MICRO-STRUCTURED SURFACE WITH IMPROVED INSULATION AND CONDENSATION RESISTANCE

Abstract

This invention is a micro-featured surface with improved insulation and condensation resistance comprising: a micro-structure included with the substrate having an arrangement of a first set of micro-features and a second set of micro-features; a first micro-feature horizontal cross section taken from the group consisting of a circle, oval, polygon, and concave portion; a condensation rate less than 0.15 grams when measure by an ambient test method; and an improved hold time of 23.00% or greater as shown by hold testing wherein a micro-feature density is in a range of 5.00% to 25.00%.

Claims

1. A micro-featured surface with improved insulation and condensation resistance comprising: a substrate; a micro-structure included with the substrate having an arrangement of a first set of micro-features and a second set of micro-features; a first micro-feature horizontal cross section taken from the group consisting of a circle, oval, polygon, and concave portion; a first micro-feature horizontal cross section dimension included in the first set of micro-features in a range of 300 μm to 750 μm; a pitch included in the micro-structure in a range of 450 μm to 1650 μm; a spacing between the first set of micro-features in the micro-structure in the range of 300 μm to 1650 μm; a depth of the first set of micro-features in a range of 420 μm to 2000 μm; a condensation rate less than 0.15 grams when measure by an ambient test method; a second set of micro-features included in the first set of micro-features having a second micro-feature horizontal cross section taken from the group consisting of pillars and opening; a second micro-feature horizontal cross section dimension included in the set of micro-features equal to or less than and the horizontal cross section dimension of the first micro-feature and, an improved hold time of 23.00% or greater as shown by hold testing wherein a micro-feature density is in a range of 0.5% to 25.00%.

2. The surface of claim 1 wherein the substrate is a beverage container.

3. The surface of claim 1 wherein the second set of micro-features includes an opening defined in a top of a first micro-feature having a diameter of less than the horizontal cross section dimension of the first micro-feature and extending into a micro-feature at least 50% of the total height of the first and second micro-feature combined.

4. The surface of claim 1 wherein the second set of microfeatures includes a pillar extending upward from a top of a first micro-feature having a width of about 50 μm and a height of about 50 μm.

5. The surface of claim 1 wherein a width of a micro-feature in the first set of micro-features has a length greater than a width and are arranged offset relative to an adjacent first micro-feature in the micro-structure.

6. The surface of claim 5 wherein the micro-features are arranged in an alternating orthogonal pattern in the micro-structure.

7. The surface of claim 1 including a generally flat top in each first micro-feature.

8. A micro-featured surface with improved condensation resistance comprising: a micro-structure having a substrate and having an arrangement of micro-features; a micro-feature horizontal cross section taken from the group consisting of a circle, oval, polygon, and concave portion; a micro-feature cross section dimension included in each micro-feature in the range of 300 μm to 750 μm; a pitch included in the micro-structure in the range of 450 μm to 1950 μm; a spacing between the micro-features in a range of 50 μm to 1650 μm; a depth of the micro-features in a range of 230 μm to 2000 μm; and, a condensation rate improvement greater than 25%.

9. The surface of claim 8 wherein the micro-features are arranged in an alternating orthogonal pattern in the micro-structure.

10. The surface of claim 8 including curved sides on at least one micro-feature.

11. The surface of claim 8 wherein the condensation rate is less than 0.75 grams when measure by the ambient test method.

12. The surface of claim 8 including a conical section included in at least one micro-feature having a top angle in a range of 130° to 150°.

13. The surface of claim 12 including a lower section disposed between the substrate and the conical section wherein the lower section has elevated cross section of a rectangle.

14. The surface of claim 8 including an elevated cross section included in the micro-feature having a polygon elevated cross section an opening angle in the range of 10° to 50°.

15. The surface of claim 8 wherein the micro-features are ridges defining channels dispose between the ridges wherein the ridges have a width in the range of 300 μm to 500 μm.

16. The surface of claim 15 wherein the ridges include tapered side with an open angle in the range of 2° to 5°.

17. The surface of claim 8 including openings defined in the substrate having a horizontal cross section taken from the group consisting of a circle, oval, polygon and any combination thereof.

18. The surface of claim 8 wherein the substrate includes an attachment side to attach the substrate to an article so that a micro-structured side is facing outward from the article.

19. A micro-featured surface with improved insulation and condensation resistance comprising: a micro-structure disposed on a substrate having a first set of micro-features included on the substrate and a second set of micro-features included in the first set of micro-features; a first micro-feature horizontal cross section taken from the group consisting of a circle, oval, polygon, and concave portion; a first micro-feature horizontal cross section having a width of about 200 μm; a second micro-feature horizontal cross section taken from the group consisting of pillars and opening; a second micro-feature horizontal cross section dimension included in the set of micro-features equal to or less than the horizontal cross section dimension of the first micro-feature; and, an improved hold time of 23.00% or greater as shown by hold testing wherein a micro-feature density is in the range of 0.5% to 25.00%.

20. The surface of claim 19 wherein a spacing is about 120 μm and a height of the first micro-feature is in a range of 350 μm and 2000 μm.

21. The surface of claim 19 wherein first micro-feature has a diameter of about 200 μm and the second micro-feature has a diameter of about 100 μm or less.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The construction designed to carry out the invention will hereinafter be described, together with other features thereof. The invention will be more readily understood from a reading of the following specification and by reference to the accompanying drawings forming a part thereof, wherein an example of the invention is shown and wherein:

[0023] FIG. 1 shows a front view of aspects of the invention;

[0024] FIGS. 2A-F show several physical properties of the invention;

[0025] FIG. 3A is a perspective view of aspects of the invention;

[0026] FIG. 3B is a top view of aspects of the invention;

[0027] FIG. 4A is a perspective view of aspects of the invention;

[0028] FIG. 4B is a top view of aspects of the invention;

[0029] FIG. 5A is a perspective view of aspects of the invention;

[0030] FIG. 5B is a top view of aspects of the invention;

[0031] FIG. 5C is a side view cut section of aspects of the invention;

[0032] FIG. 6A is a perspective view of aspects of the invention;

[0033] FIG. 6B is a top view of aspects of the invention;

[0034] FIGS. 6C and 6D are side view cut sections of aspects of the invention;

[0035] FIG. 7A is a perspective view of aspects of the invention;

[0036] FIG. 7B is a top view of aspects of the invention;

[0037] FIG. 7C is a side view cut section of aspects of the invention;

[0038] FIG. 8A is a perspective view of aspects of the invention;

[0039] FIG. 8B is a top view of aspects of the invention;

[0040] FIG. 9A is a perspective view of aspects of the invention;

[0041] FIG. 9B is a top view of aspects of the invention;

[0042] FIG. 3A is a perspective view of aspects of the invention;

[0043] FIG. 10 is a perspective view of aspects of the invention; and,

[0044] FIG. 11 is a perspective view of aspects of the invention.

[0045] It will be understood by those skilled in the art that one or more aspects of this invention can meet certain objectives, while one or more other aspects can meet certain other objectives. Each objective may not apply equally, in all its respects, to every aspect of this invention. As such, the preceding objects can be viewed in the alternative with respect to any one aspect of this invention. These and other objects and features of the invention will become more fully apparent when the following detailed description is read in conjunction with the accompanying figures and examples. However, it is to be understood that both the foregoing summary of the invention and the following detailed description are of a preferred embodiment and not restrictive of the invention or other alternate embodiments of the invention. In particular, while the invention is described herein with reference to a number of specific embodiments, it will be appreciated that the description is illustrative of the invention and is not constructed as limiting of the invention. Various modifications and applications may occur to those who are skilled in the art, without departing from the spirit and the scope of the invention, as described by the appended claims. Likewise, other objects, features, benefits and advantages of the present invention will be apparent from this summary and certain embodiments described below, and will be readily apparent to those skilled in the art. Such objects, features, benefits and advantages will be apparent from the above in conjunction with the accompanying examples, data, figures and all reasonable inferences to be drawn therefrom, alone or with consideration of the references incorporated herein.

DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT

[0046] With reference to the drawings, the invention will now be described in more detail. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood to one of ordinary skill in the art to which the presently disclosed subject matter belongs. Although any methods, devices, and materials similar or equivalent to those described herein can be used in the practice or testing of the presently disclosed subject matter, representative methods, devices, and materials are herein described.

[0047] Referring to FIG. 1, a container 10, cup in one example, is provided with micro-structures 12 on at least a portion of the outer wall 14 of the container that can come into contact with an individual's hand having a micro-structured outer wall surface 16 of a beverage container. The portion having micro-features can be of any shape, and can be transparent or partially transparent so as to allow a graphic 13, such as a logo, to view through the micro-feature. The micro-structured surface can also be on a surface that is integrated into an article such a cup, glass, beverage container, film wrap, tape, label, pipe, or ice tray 11, to provide some examples. The micro-features can be manufactured into the outer wall surface. In one embodiment, the micro-features or micro-patterns can include individual features with height between 70 μm and 1000 μm. The micro-structures with a micro-feature density on the outer wall of the beverage container of between about 0.5% and 25% reduce heat transfer from a hot surface (such as an outer wall) to a second surface (such as a hand) that rests against the outer ends of the micro features facing away from the hot surface. The micro-features can be uniformly distributed in a random pattern or can be systematically arranged such as in rows, grids, asymmetrical arrangement, offset rows, or any combination.

[0048] The substrata can include a micro-structured side where the micro-feature included in the micro-structure is disposed away from an article where the micro-structure is attached. The micro-structure can be manufactured into an article, such as a cup, so that the substrate coincides with a surface of the article itself. In one embodiment, the substrate can be adhered to an article and therefore can include an attachment side to adhere the substrate to an article allowing the micro-structured side to face outward from the article.

[0049] Using the microstructure can increase the hold time a container containing a hot liquid can be held by a person, test subject, from 11 seconds for a smooth cup to over 29 seconds for a micro-structured cup in one embodiment. This is shown by hold testing, in one scenario, by having test subjects hold cups filled with water heated to at least 190° F. The cups were covered with polypropylene sheets that had various micro-surface patterns embossed on their outer surface. The time was measured until the cup was uncomfortable to hold and the person needed to set it down. Multiple repeats of the test were done to ensure that the results were valid. From these test, the following results were obtained as shown in Table 1 and FIG. 2A through 2F corresponding below.

TABLE-US-00001 TABLE 1 Average Average Hold Time Percent Temperature Pattern FIG. (Seconds) Improvement (° F.) Control 2A 11.48 0.00% 175.07 #003AP 2B 20.11 75.17% 176.09 #049AP 2C 14.07 22.56% 170.5 #008AP 2D 18.71 62.98% 176.01 #128AP 2E 29.22 154.53% 175.4 #129AP 2F 14.16 23.34% 175.01

[0050] The micro-feature density on the outer wall is related to the improved insulation properties an anti-condensation property of the present invention. Micro-feature density is the ratio of micro-structured feature in a given area to the total area. For example, if a portion of the outer surface of the beverage container is 100 cm.sup.2 and the micro-feature structures occupy 10 cm.sup.2, then the micro-feature density would be 10%. The micro-feature density can be varied from 0% to 100%. Hold time (in seconds), in one scenario, relates to the micro-feature density (in percentages) as shown in Table 2.

TABLE-US-00002 Micro-feature Density Hold Time Hold Time (approximate) (Approx. secs) Improvement  0% 11 0.00%  5% 14 27.27% 10% 20-30 127.27% 20% 19 72.73% 25% 14 27.27% 100%  11 0.00%
From the data gathered in the hot cup portion of this study it appears that embodiment #128AP performed the best in average hold time when being observed in a general demographic or participants.

[0051] The present invention can also include several embodiments where the micro-feature height is varied and that hold time is affected by the micro-feature height. The relationship between the micro-feature height and the hold time is shown in Table 3.

TABLE-US-00003 TABLE 3 Micro-feature Height Hold Time (approximate μm) (Approx. secs) 0 11 70 20 75 14 220 14 350 18 420 29
A micro-feature that that is 420 microns tall and that has 1% contact to the skin, tested the same of the paper sleeve (in the range 52 to 65 seconds). The upper 50 microns of the pillar had reduced area of contact. The two level design prevented penetration into the skin to the depth of the nerves. Thus it was comfortable when squeezed (in either cups filled with hot or cold beverage). In one embodiment includes micro-features that are 1000 micron tall and have 11% contact to the skin. This embodiment tested superior to the paper sleeve (range 30 to 199 seconds). As shown, increasing the micro-feature height improves the hold time for a beverage container with hot liquid. Table 4 illustrates additional properties of the present invention.

TABLE-US-00004 TABLE 4 Pattern Distance Pattern Descrip- Feature Between Con- ID tion Feature Size Height Features tact % Control Smooth NA NA NA 100 Control #003AP Ovals 50 μm × 25 μm  70 μm 100 μm 9.8 #049AP Wide  50 μm  75 μm 200 μm 25 Contin- uous Lines #008AP Circles 200 μm 350 μm 400 μm 19.6 #128AP Oval 300 μm × 600 μm 420 μm 1.2 mm 9.8 #129AB Oval 150 μm × 300 μm 220 μm 900 μm 4.4
Further testing was conducted with additional micro patterns developed as shown in Table 5.

TABLE-US-00005 TABLE 5 Additional Micro Patterns Developed for Hot Surfaces ID Width Shape Pitch Array Height Contact H226AP Cold 450 circle 1200 rectangular 1000 11.0% study H227AP Cold 450 circle 1200 rectangular 2000 11.0% study H238AP New 300 × 600 ellipse 2400 rectangular 600 2.5% H239AP New 200 × 150 Circular 1200 Rectangular 420 1.0% pillar with indent hole H240AP New 200 × Square 1200 Rectangular 420 2.1% 200, 100 × pillar 100 with indent cross H241AP New 150 Circular 1200 Rectangular 420 1.2% pillar
Table 6 shows results of testing the additional surfaces.

TABLE-US-00006 TABLE 6 Test Results for Hold Time with Hot Liquids Paper Cups Range of Ranking Points Rank with Micro Tests Hold Times (Pair wise (lowest num- Pattern ID (approximate seconds) comparisons) ber is best) H226AP 50 to 199 10.5 2 H227AP 55 to 134 11 1 H238AP 13 to 39  4.5 5 H239AP 42 to 65  8 3 H240AP 21 to 45  6 4 H241AP 3 to 39 2 8 Paper Cup with 4 to 32 3 7 Polypropylene Film Coat Paper Cup 5 to 28 1 9 Paper Cup with 21 to 120 5 6 Paper Sleeve
In pair-wise comparison ranking measuring the time for several people holding the cups and comparing in pairs, micro surfaces H226AP and H227AP were superior to with use paper sleeve or the paper or polypropylene coated cups. H238AP, H239AP, and H240AP gave statistically the same hold time as when a paper sleeve was used and were superior to the paper or polypropylene coated cups. Further reduction of contact area and increases in height improved hold time.

[0052] We also see that a reduction of condensation, measured by weight, for a beverage container with a cold liquid based upon the particular microstructure pattern that is used. Referring to FIG. 2A through 2F, the micro-feature patterns that are included in several embodiments are shown and designated pattern #000, #003AP, #008AP, #049AP, #128AP and #129AP respectively. Pattern 000 is a non-micro-featured surface and used a control for testing of the various embodiments of the present invention. Pattern #003AP generally contains micro-features with horizontal cross sections that are oval and can include rounded edges. The various micro-features can be arranged so that the long axis of the micro-features alternate about 180 degree to the adjacent micro-feature or are in an alternating orthogonal pattern. Pattern #008AP includes a horizontal cross section that is generally circular and can have generally flat or rounded tips or tops. The micro-features can be arranged in an offset linear fashion so that the vertical rows are offset in relation to the adjacent vertical rows. Pattern #049AP is ridges that run along the surface in generally parallel formation. Pattern #128AP generally contains micro-features with cross sections that are elliptical. The various micro-features can be arranged so that the long axis of the micro-features alternate about 180 degree to the adjacent micro-feature or are in an alternating orthogonal pattern.

[0053] Referring to FIGS. 3A and 3B, a perspective view and top view showing micro-features that are have a generally oval horizontal cross section 21. The micro-features can be arranged so that the long axis 20a of the micro-features alternate about 180 degrees to the adjacent long axis 20b micro-feature or are in an alternating orthogonal pattern shown generally as 22. In one embodiment, the width 24 of the micro-feature is in the range of 0.25 mm and 0.30 mm; the length 26 is in the range of 0.55 mm to 0.65 mm. The height 28 is in the range of 0.35 mm and 0.50 mm. The spacing 30 between micro-feature is in the range of 1.10 mm and 1.30 mm. In one embodiment, the ends 32 of the micro-feature can be curved.

[0054] Referring to FIGS. 4A and 4B, the micro-features shown can have a generally circular cross section 34. In one embodiment, the diameter of the cross section is in the range of 0.40 mm to 0.50 mm. The pitch, or distance 36 between micro-features is in the range of 1.10 mm and 1.30 mm. The height 38 is in the range of 0.35 mm to 0.50 mm. In one embodiment, the pitch 40 can be in the range of 0.40 mm to 0.60 mm and is about 0.50 mm in one embodiment. In one embodiment, the pitch is in the range of 0.70 mm and 0.80 mm and 0.75 mm on one embodiment. In one embodiment, the pitch is in the range of 1.80 mm and 2.10 mm and 1.95 mm in one embodiment. In one embodiment, the pitch is in the range of 3.40 mm and 3.50 mm and 3.45 mm on one embodiment. In one embodiment, the diameter of the micro-features is in the range of 0.05 mm and 0.15 mm. The pitch is in the range of 0.80 mm and 0.90 mm. The height can be in the range of 0.025 mm to 0.075 mm in one embodiment, 0.8 mm to 1.2 mm in one embodiment and 1.8 mm to 2.2 mm in one embodiment.

[0055] Referring to FIGS. 5A through 5C, one embodiment of micro-features is shown. In this embodiment, the micro-feature can have a generally circular horizontal cross section 40 in a lower section 44 with a conical section 42 adjacent to the lower section wherein the in the conical section the diameter of the conical section decreases in a direction 46 opposite the substrate. The lower section can have an elevated cross section of a polygon, rectangle, and square. The pitch 48 can be in the range of 1.10 mm to 1.3 mm. The diameter of the lower section can be in the range of 0.8 mm to 1.2 mm. The height of the lower section and conical section together can be in the range of 0.35 mm to 0.5 mm. Referring to FIG. 5C, showing an elevated cross section along 41, the conical section can include a top angle 50 in the range of 130° to 150°. In one embodiment, the micro-feature does not include the lower section. The pitch can be in the range of 2.50 mm to 3.00 mm. The height of the conical section can be in the range of 0.30 mm to 0.50 mm.

[0056] Referring to FIGS. 6A through 6D, the micro-features can include generally oblong horizontal cross sections 52 and can be arranged with alternating 180° offset relative to the adjacent micro-features. The sides 54 of the micro-feature can include a curve. On one embodiment, the area of the elevated cross section 53 can decrease in a direction 56 opposite the substrate. The pitch can be in the range of 1.00 mm to 1.40 mm. The elevated cross section at the largest point 58 of the micro feature can be in the range of 0.40 mm to 0.80 mm. The height 60 of the micro-feature can in the range of 0.35 mm to 0.50 mm. In one embodiment, the top 62 of the micro-feature is generally flat. The opening angle 64 can be in the range of 10° to 20°. In one embodiment, the opening angle is in the range of 20° to 50°. In one embodiment, the top 66 of the micro-feature can be rounded. In one embodiment, the micro-feature is a partial sphere having a diameter in the range of 0.40 mm to 0.50 mm. The partial sphere 68 can have a radius 70 of 0.23 mm.

[0057] Referring to FIGS. 7A and 7B, one embodiment is shown with ridges 72 defining slots 74 on a substrate. The ridges can have a width 76 in the range of 0.30 mm to 0.50 mm, a pitch 78 in the range of 1.00 mm to 1.40 mm and a height 80 in the range of 0.30 mm to 0.50 mm. The ridges can be tapered side 80a and 80b with an open angle 82 in the range of 2.00° to 5.00°. An elevated cross section of one or more micro-features along direction 81 can be a polygon and in one embodiment, a square.

[0058] Referring to FIGS. 8A and 8B, one embodiment is shown with opening 84 defined in a substrate 86. The opening can be circular, oval, polygon, asymmetrical shape or any combination thereof. In one embodiment, the opening is a hexagon. The opening can be separated as shown by 88 between 0.65 mm to 0.85 mm from side to side and the pitch 90 between sides can be in the range of 0.35 mm to 0.55 mm. The substrate can have a thickness 92 in the range of 0.35 mm to 0.50 mm. The elevated cross section along 91 can include concave portion defined in the substrate. The concave portion can be a partial circle, oval, or polygon. Referring to FIGS. 9A and 9B, the combination of these micro-features can be used to form a micro-structured surface. In this embodiment, ridges 94 are disposed adjacent to an arrangement of columns 96. The first set of micro-features 98 can be adjacent to a second set of micro-features 100 which can in turn be adjacent to a third set of micro-features 102. Two or more sets of micro-features can alternate along the substrate 104 to form a micro-structured surface.

[0059] Referring to FIG. 10, the micro-feature is shown that can be used to provide for improved insulation properties of a container. This aspect of the invention can be used to improve the tactical sensation of holding a hot container such as a cup and to eliminate the need for accessories such as cup sleeves. The micro-features can include a circular horizontal cross section and be generally column configuration. One or more columns of the micro-feature can include a vertical cavity defined in the column extended lengthwise along the column. The cavity can extend through the entire column or only through a portion of the column. The arrangement of columns 106 can include column 108 having an outer diameter 110 and an opening 112 defined in the top of the column. The opening can extend through the column and in one embodiment, extends into the column a depth in the range of 0.025 mm to the length of the column. The outer diameter can be in the range of 0.10 mm to 0.30 mm and the diameter of the opening can be in the range of 0.05 mm to 0.15 mm. Referring to FIG. 11, the micro-features 114 can have a horizontal cross section 115 that is a polygon and specifically a square in one embodiment. A second layer 116 of micro-features can be placed on the first micro-feature 114. In one embodiment, the second layer of micro-features includes secondary micro-feature 118 disposed at the corners of the top of the first micro-feature. In one embodiment, the first micro-feature has a width and length in the range of 0.10 mm to 0.30 mm and the secondary micro-feature has a width and depth in the range of 0.025 mm to 0.075 mm. The pitch 120 can be in the range of 1.10 mm to 1.30 mm.

[0060] The present invention can also reduce the amount of condensation on the outer wall of the beverage container when the beverage container contains a cold liquid. Different micro-feature patterns are placed on the outer wall; beverage containers were covered with thin sheets of polypropylene and embossed with the various micro-patterns. The beverage containers were then filled with a precise amount of ice and water. The exterior surface was dried and then the cups were placed in a 100% humid chamber on a dry dish. The humidity chamber was continuously replenished with humidity from a container of boiling water. The cups and the dish under the cup were weighed every 5 minutes for 25 minutes. The results of the weight of the condensation on the beverage container for each of the microstructure patterns is generally shown in Table 7.

TABLE-US-00007 TABLE 7 Control #003AP #008AP #128AP #129AP Time (2A) (2B) #0049AP (2D) (2C) (2E) (2F) 5 2.000 0.687 0.812 0.687 0.375 0.562 10 2.375 0.875 0.885 0.750 0.667 0.687 15 2.688 1.125 1.500 1.063 0.749 0.750 20 2.875 1.625 1.688 1.057 1.000 1.000 25 3.000 2.250 2.255 1.500 1.438 1.438
The weight in grams of the condensation in the dish placed under the beverage container is shown in Table 8 at various measurement times.

TABLE-US-00008 TABLE 8 Time (s) Control #003AP #008AP #128AP #129AP 5 0.00 0.00 0.00 0.00 0.00 10 0.00 0.10 0.00 0.00 0.00 15 0.10 0.40 0.00 0.00 0.10 20 0.10 0.40 0.10 0.00 0.10 25 0.20 0.50 0.10 0.00 0.20

[0061] We also see that the height of the micro-features on the outer wall of the beverage container affects the amount of condensation produced. Generally, the higher the micro-feature height, the less condensation is produced. The relationship between the height of the micro-features and the condensation measured by weight is shown in Table 9.

TABLE-US-00009 TABLE 9 Micro-feature Height Weight Condensation (approximate μm) (grams) 0 0.6 70 0.1 75 0.5 220 0.2 350 0.1 420 0.0
Initial finding show that pattern #128AP is the best performer in gathering the least amount of condensation on the cup. Additionally pattern #128AP was also the best performer in the amount of condensation that fell off the cup into a dish beneath it. The control pattern overall did the worst except for in one instance where #003AP did slightly worse in the amount of condensation gathered into a dish.

[0062] The weight of condensation on the dish below the cup for various micro-feature densities is shown in Table 10.

TABLE-US-00010 TABLE 10 Micro-feature Density Weight Condensation (percentage) (grams) 5 0.2 10 0.0-0.5 20 0.1 25 0.1 100 0.6

[0063] The micro-patterns can be formed on paper, metal, ceramic, or plastic surfaces such as cups by embossing, stamping, injection molding, compression molding, laminating, ink jet printing, additive manufacturing processes, and by other ink printing processes. The ink printing processes can include techniques of using viscous inks that give raised features such as thermal transfer printing. Micro-features placed on the outer wall of a beverage container with heights between 70 μm and 1000 μm, and with micro-features densities of between about 0.5% and 25% reduce vapor condensation from a humid atmosphere.

[0064] In one scenario using an ambient test method, the test sample is a cup that is filled with ice water. The cup is placed on a pre-weighted dish. The cup and dish is placed in an ambient environment, such as an office setting or outdoors with humidity in excess 50%. After a pre-determined time, 1 hour in one scenario, the dish and cup is weighted and the difference from the prior weighting is recorded representing condensation.

[0065] In one embodiment a fog test method is used wherein a semi-sealed chamber with piezo humidifier generating fog equal to or greater than 90% humidity can be used. Boiling water placed in the chamber provides the humidity. In one embodiment, a fog generator is used including a chamber with a fan to circulate air to reduce or eliminate the humidity gradient. In one scenario, the lowering the fog generator output and potentially passing the fog through a mixing chamber to dissipate fog droplets into vapor results in around 75% relative humidity in the chamber. The results from these tests are shown in Table 11.

TABLE-US-00011 TABLE 11 After 2 hrs cup + Added water Petri water and ice + After 2 hrs remaining Pattern Dish Cup and petri dish petri dish condensation ID wt. wt. ice wt. wt. wt. on dish H216 8.31 22.07 430.69 454.12 8.41 0.1 H217 8.31 23.66 407.55 441.07 8.39 0.08 H218 8.31 23.32 418.99 443.83 8.4 0.09 H219 8.3 21.62 413.15 444.45 8.38 0.08 H220 8.31 21.01 408.23 430.03 8.37 0.06 H221 0 H222 8.31 21.04 415.52 437.49 8.4 0.09 H223 8.31 22.18 417.18 449.99 8.43 0.12 H224 8.31 20.93 401.65 432.02 8.36 0.05 H225 8.32 20.5 408.55 438.59 8.49 0.17 H226 8.31 23.78 406.15 439.41 8.36 0.05 H227 8.32 25.17 413.94 414.74 8.4 0.08 H228 8.31 22.59 411.98 436.11 8.37 0.06 H229 8.31 23.12 424.25 456.54 8.34 0.03 H230 8.31 20.63 413.14 443.56 8.36 0.05 H231 0 H232 8.31 24.36 404.65 431.04 8.36 0.05 H233 0 H234 (H) 8.31 20.29 428.1 449.83 8.34 0.03 H235 8.31 21.66 415.43 446.93 8.35 0.04 H236 8.31 23.73 410.64 435.87 8.36 0.05 H237 8.33 21.6 409.95 441.01 8.33 0 window 8.32 16.65 403.11 429.32 8.55 0.23 screen
Additional information is shown in Tables 12A and 12B.

TABLE-US-00012 TABLE 12A Condensation Adjusted Rate (grams) size 2 of 3 smallest (size at top of draft Pattern ID points feature) Shape pitch depth spacing angle H227AP 0.00 450 circle 1200 2000 750 0 H236AP 0.00 450 lines 1200 420 750 0 PP Mesh 0.00 460 holes 1280 340 820 0 Screen H226AP 0.00 450 circle 1200 1000 750 0 H232AP 0.01 450 lines 1200 420 750 3 H234AH 0.01 450 web of circles 1200 420 1200 0 H128AP −0.01 450 oval 1200 420 750 0 H218AP 0.01 450 circle 750 420 300 0 H233AH 0.00 450 web (honeycomb) 1200 420 750 0 H237AP 0.04 381 lines 1200 420 819 14 H235AP 0.15 450 lines + pillars 1200 420 750 0 H216AP 0.08 450 circle 1200 420 750 0 H230AP 0.43 450 oval with rounded 1200 420 750 30 top H229AP 0.35 490.5 oval 1200 420 709.5 7 H221AP 0.42 100 circle 850 420 750 0 H231AP 0.40 450 dimple 1200 225 750 15 H228AP 0.59 490.5 oval 1200 420 709.5 15 H219AP 0.63 450 circle 1950 420 1500 0 H217AP 0.76 450 circle 500 420 50 0 H222AP 0.68 1000 circle 1750 420 750 45 H220AP 0.86 450 circle 3450 420 3000 0 H224AP 0.96 3000 circle 3750 420 750 45 H225AP 1.10 450 circle 1200 50 750 0 H223AP 0.98 2000 circle 2750 420 750 45 Smooth 1.03 Control

TABLE-US-00013 TABLE 12B Condensation Difference Rate from Smooth Percent Pattern ID (grams) Control Improvement H227AP 0.000 1.030 100.00% H236AP 0.000 1.030 100.00% PP Mesh Screen 0.000 1.030 100.00% H226AP 0.000 1.030 100.00% H232AP 0.010 1.020 99.03% H234AH 0.010 1.020 99.03% H128AP −0.010 1.040 100.97% H218AP 0.010 1.020 99.03% H233AH 0.000 1.030 100.00% H237AP 0.040 0.990 96.12% H235AP 0.150 0.880 85.44% H216AP 0.080 0.950 92.23% H230AP 0.430 0.600 58.25% H229AP 0.350 0.680 66.02% H221AP 0.420 0.610 59.22% H231AP 0.400 0.630 61.17% H228AP 0.590 0.440 42.72% H219AP 0.630 0.400 38.83% H217AP 0.760 0.270 26.21% H222AP 0.680 0.350 33.98% H220AP 0.860 0.170 16.50% H224AP 0.960 0.070 6.80% H225AP 1.100 −0.070 −6.80% H223AP 0.980 0.050 4.85% Smooth Control 1.030 0.000 0.00%
In one embodiment, the oval is an ellipse. The adjusted size can define the size of the top of the micro-feature and can be in the range of 380 μm to 460 μm. In one embodiment, the adjusted size at the top can be in the range of 450 μm to 460 μm. Additional Information is shown in Table 13. Note that in table 13, distance measurements are provided in millimeter. For width measurements, oblong features are shown with two dimensions, width and length, while the remaining is shown with one measurement representing the width and length of the micro-feature.

TABLE-US-00014 TABLE 13 Pattern Shape Width Pitch Spacing Depth Draft H128A Oval 0.30 × 0.60 1.20 0.75 0.42 0 H216A Circle 0.45 1.20 0.75 0.42 0 H217A Circle 0.45 0.50 0.05 0.42 0 H218A Circle 0.45 0.75 0.30 0.42 0 H219A Circle 0.45 1.95 1.5 0.42 0 H220A Circle 0.45 3.45 3.00 0.42 0 H221A Circle 0.1 0.85 0.75 0.42 0 H222A Circle 1.00 1.75 0.75 0.42 0 H223A Circle 2.00 2.75 0.75 0.42 0 H224A Circle 3.00 3.75 0.75 0.42 0 H225A Circle 0.45 1.20 0.75 0.05 0 H226A Circle 0.45 1.20 0.75 1.00 0 H227A Circle 0.45 1.20 0.75 2.00 0 H228A Oval 0.381 × 0.60  1.20 0.75 0.42 15°  H229A Oval 0.381 × 0.60  1.20 0.75 0.42 30°  H230A Oval 0.30 × 0.60 1.20 0.75 0.42 0 H231A Dimple 0.45 1.20 0.75 0.225 arced H232A Ridges 0.45 1.20 0.75 0.42  3°. H233A Web 0.45 1.20 0.75 0.42 0 H234AH Circle 0.45 1.65 1.20 0.42 0 H235A Ridges 0.45 1.20 0.76 0.42 0 and Pillars H236A Ridge 0.45 1.20 0.75 0.42 0 H237A Ridges 0.381 1.20 0.75 0.42 14°. Polypropylene 0.46 1.26 0.83 0.34 20 × 20 mesh

[0066] The anti-condensation properties of the present invention can be provided with specific micro-features and patterns. Any horizontal cross sectional geometric shape (circles, squares, triangles, holes or honeycomb, woven or punched mesh, ridges or any combination) can be used with spacing of 300 to 1200 microns; width 380 to 450 microns; depth 340 to 2000 microns; and optionally having sharp edges and with vertical sides of the micro features having draft angle less than 10 degrees. The micro-features can be added to a surface, substrate, product or tooling by molding, embossing, machining, extrusion, electrical discharge machining, laser engraving, contact printing, ink jet printing, 3D printing, rapid prototyping or other printing processes. The micro-features can be added to a surface adding a label, wrap, tape or sleeve made by molding, embossing, machining, extrusion, electrical discharge machining, or laser engraving. Surfaces having honeycomb and woven meshes can be used as auxiliary products such as sleeves, labels, tapes or wraps added to existing cold surfaces such as beverage containers, pipes, windows, and other embodiment wherein the physical properties of the present invention are advantageous. The through holes can improve visibility of liquid contents. Mesh and honey-comb products can be made by punching or piercing and stretching a sheet or made be made by weaving filaments to form a woven screen. The anti-condensation surface may be made of plastic, rubber, fiber, wood, metal, glass or ceramic. The anti-condensation micro-surface may be made of a different material than the cold surface.

[0067] It should be noted that multiple micro-features can be layers on a surface to provide for advantageous properties. For example, pillars on pillars or pillars on pillars on pillars.

[0068] In performing the tests to achieve the results described here and to describe the physical properties of the present invention, the objective is to determine a micro-feature pattern on a fiber hot cup that most effectively reduces surface contact points with a consumer's hand. By modifying the surface properties of the beverage container with micro-features, the consumer's comfort threshold is enhanced for holding beverage containers having a hot liquid and to provide a better grip. The beverage container can be single walled or double walled. This testing can include two phases, a motion oriented test and a thermal panel test. The motion oriented test aims measures the number of times the consumer must switch hands while walking across a predetermined distance and to also the timing at which it takes place. Additional consumer insight was gathered based off of questionnaires presented during each test. For the thermal panel test, consumers are given a cup set to compare and will be asked to fill out a questionnaire giving their temperature perception and ranking the hottest to coldest feeling cup.

[0069] The material used for the testing can include: hot plate (to insure the water stays the same temperature), coffee pot (to hold water inside between trials), water (kept at 190° F., tray (to transport cups to consumer), thermometer (measure the temperature of the water), stopwatch (timing how long people hold cup), cup samples, control cups, lids, sleeves, cup of room temperature (neutral temperature surface for use before each cup sample is tested), questionnaires, and walking space. The preparation for testing includes the steps of: preparing samples in packaging lab, labeling cups corresponding to different variables, marking fill level on all cups, validating how long it takes to fill, cap, and hand cup to consumer, providing pretest questionnaire to consumer via email after sign up, preforming a motion oriented test, recording which cup the consumer is testing before the motion test, preforming a thermal panel test, marking tray with corresponding letters to the sample ID's of each cup trial to match cups with questionnaires.

[0070] In performing a motion oriented test, pre-preparation steps are performed as stated herein. The temp of the water is measured to insure it is at the proper temperature, such as 190° F. in one test scenario. The sample to be tested is filled with the heated water to a predetermined level, between 60% and 95% full in one embodiment. The sample is placed on a tray. Test subjects are interviewed to inquire how they would hold the test sample, a cup on one test scenario and with which hand. The test subjects grip style on cup is observed and photographed. The test subject holds a neutral temperature cup, room temperature in one scenario, before handling test sample. The test sample is handled by the test subject. The test subject is requested to walk from a starting point, along a path, wherein the path represents normal walking pattern in one embodiment, while holding the test sample. The test subject is observed how many times the test subject changes hands, grip styles, or releases the test sample altogether. These events are recorded with associated timestamps. In one embodiment, the time stamps are determined from a video recording these events. Once the path is completed, the test subject is provided with a control sample with a sleeve and requested to repeat the path. In one embodiment, the path is reversed with the control sample. The test subject is provided with a questionnaire concerning the test sample and the control samples. The samples are collected form the set subjects at the conclusion of test.

[0071] When conducting the thermal panel test, the pre-test preparations are performed as stated herein. The temperature of the water is measured to insure that it is about 190° F. in one scenario. In one scenario, three test samples are selected to be provided to test subjects. The test samples are placed on a tray in predetermined positions (e.g. A, B, and C position). The test subjects were interview as to how they would hold the test sample and with which hand. The test sample is then filled with heated water and capped. Prior to allowing the test subject to handle the test sample, the test subject is provided with a neutral temperature sample prior to handling the test sample with heated water. The test subject is then instructed to handle the test sample until it is no longer comfortable to do so. The time is observed and recorded and once the test subject releases the first test samples, the process is released for additional test samples (e.g. A, B, and C). The test subject then ranks the test samples from hottest to coldest. In one scenario, the test subjects rank 1 to 3 with 1 being no difference and 3 being a large difference in temperature between the test samples. The hold time for each test subject for each test samples can also be recorded, correlated with the ranking and used to provide some validation of the ranking. The test subjects can then be interviewed concerning any additional comments directed to the grip or other measureable attributes from a questionnaire.

[0072] The testing for determining the physical properties of the concerning condensation were performed using the following materials: hot plate (heat water to create humidity chamber), coffee pot (hold water during heating), water (water will be kept at 190° F. or above), tray (transport cups), thermometer, stopwatch, lids for cups, beaker, and scale.

[0073] The following procedures can be followed to perform the thermal panel test that can include the following steps. First, a heating source such as a hot plate can be activated and heat a liquid such as water in a first container. The temperature of the heated liquid is measured periodically and recorded. A second container is used with dishes that can be placed around the container. Each dish can be assigned to the test sample and the initial weight of each dish with the test sample and optionally a lid is taken and recorded. The test samples can be filled with ice and a liquid such as water. In one embodiment, the test samples are filled with between 150 and 225 grams of ice and 100 to 300 grams of water. Lids can be placed on the test samples. When the water in the first container reaches or exceed about 180° F., in one scenario, the test samples are placed on the respective dishes. The heated liquid is place on the second container and a covering is placed over the second container and the test samples to create a humidity chamber. The time is recorded and once a pre-determined period of time has elapsed, the cover is removed. The weights of each test samples, each dish, and the final temperature of each cup. The difference in the weight of the cup initially and after the above process represents the amount of condensation.

[0074] Unless specifically stated, terms and phrases used in this document, and variations thereof, unless otherwise expressly stated, should be construed as open ended as opposed to limiting. Likewise, a group of items linked with the conjunction “and” should not be read as requiring that each and every one of those items be present in the grouping, but rather should be read as “and/or” unless expressly stated otherwise. Similarly, a group of items linked with the conjunction “or” should not be read as requiring mutual exclusivity among that group, but rather should also be read as “and/or” unless expressly stated otherwise.

[0075] Furthermore, although items, elements or components of the disclosure may be described or claimed in the singular, the plural is contemplated to be within the scope thereof unless limitation to the singular is explicitly stated. The presence of broadening words and phrases such as “one or more,” “at least,” “but not limited to” or other like phrases in some instances shall not be read to mean that the narrower case is intended or required in instances where such broadening phrases may be absent.

[0076] While the present subject matter has been described in detail with respect to specific exemplary embodiments and methods thereof, it will be appreciated that those skilled in the art, upon attaining an understanding of the foregoing may readily produce alterations to, variations of, and equivalents to such embodiments. Accordingly, the scope of the present disclosure is by way of example rather than by way of limitation, and the subject disclosure does not preclude inclusion of such modifications, variations and/or additions to the present subject matter as would be readily apparent to one of ordinary skill in the art using the teachings disclosed herein.