WOOD-ENCASED PENCIL

Abstract

A description is given of a wood-encased pencil comprising a casing and a core, the casing consisting of wood material impregnated with a saccharide component, the saccharide component comprising at least one mono-, di- or oligosaccharide and at least one polybasic organic acid in solution in a vehicle.

Claims

1. A wood-encased pencil, comprising: a casing consisting of a wood material impregnated with a saccharide component, the saccharide component comprising at least one of a monosaccharide, a disaccharide, or an oligosaccharide, and at least one polybasic organic acid in a solution in a vehicle; and a core.

2. The wood-encased pencil according to claim 1, wherein the saccharide component comprises at least one monosaccharide and at least one oligosaccharide.

3. The wood-encased pencil according to claim 1, wherein the saccharide component comprises at least one oligosaccharide constructed of glucose units.

4. The wood-encased pencil according to claim 2, wherein the saccharide component comprises a monosaccharide selected from the group consisting of: glucose, galactose, mannose, fructose, arabinose, xylose, ribose, and combinations thereof.

5. The wood-encased pencil according to claim 1, wherein the saccharide component comprises a disaccharide selected from the group consisting of: maltose, lactose, sucrose, and combinations thereof.

6. The wood-encased pencil according to claim 5, wherein the oligosaccharide of the saccharide component comprises oligosaccharide maltodextrin with a dextrose equivalent of from 3 to 30.

7. The wood-encased pencil according to claim 1, wherein the saccharide component comprises, as polybasic acid, citric acid, tartaric acid, oxalic acid, mucic acid, fumaric acid, an aldaric acid, or a combination thereof.

8. The wood-encased pencil according to claim 1, wherein the saccharide component further comprises at least one monobasic organic acid.

9. The wood-encased pencil according to claim 8, wherein the at least one monobasic organic acid is acetic acid, lactic acid, an alduronic acid, mandelic acid, or a mixture thereof.

10. The wood-encased pencil according to claim 1, wherein the saccharide component further comprises a polyol.

11. The wood-encased pencil according to claim 10, wherein the polyol is selected from the group consisting of pentaerythritol, polyvinyl alcohol, and a combination thereof.

12. A method of Method for impregnating a wood, comprising: impregnating the wood with a saccharide component of claim 1 for from 10 minutes to 24 hours at a temperature of 0° C. to 90° C.

13. A method of producing a wood having solvent barrier properties, comprising: impregnating the wood with a saccharide component of claim 1 for from 10 minutes to 24 hours at a temperature of 0° C. to 90° C.

14. A composition for generating solvent barrier properties in a wood or a wood substitute, the composition comprising: at least one of a monosaccharide, a disaccharide, an oligosaccharide, and at least one polybasic organic acid.

15. The composition according to claim 14, wherein the composition comprises at least one oligosaccharide constructed of glucose units.

16. The wood-encased pencil of claim 3, wherein the at least one oligosaccharide constructed of glucose units comprises maltodextrin.

17. The composition according to claim 15, wherein the at least one oligosaccharide constructed of glucose units comprises maltodextrin.

18. The composition according to claim 15, further comprising at least one monosaccharide.

19. The composition according to claim 15, further comprising citric acid.

20. The composition according to claim 19, wherein the citric acid is mixed with at least one of: acetic acid, polyvinyl alcohol, or a combination thereof.

Description

EXAMPLE 1

[0039] Wood material was placed into an impregnating solution containing 16.3% by weight of citric acid, 1.6% by weight of glucose, 7.1% by weight of maltodextrin and 1% by weight of PVA in aqueous solution. The wood material was subsequently dried as follows:

Preliminary drying/drip drying 1 h at 25° C.
Heating to 65° C. within 30 minutes

3 h at 65° C.

[0040] Heating to 100° C. within 30 minutes

12 h at 100° C.

[0041] After cooling, the wood material was processed into a boat into which a core had been inserted. Moreover, for comparison, boats of untreated wood material were produced, and were equipped with the same core compound. The composition of the core compound embedded into the cedar wood boats was as follows:

TABLE-US-00001 TABLE 1 INCI - US K K Value Unit Iron Oxides 77491/77492/77499 Z F  28.943% Synthetic Wax Z B  14.473% Isododecane Z B    12% Polybutene Z B  11.182% Hydrogenated Cottonseed Oil Z B   6.578% Hydrogenated Polyisobutene Z B   5.333% Hydrogenated Polydecene Z B   5.333% Hydrogenated Poly(C6-14 Olefin) Z B   5.333% Simmondsia Chinensis (Jojoba) Z B   3.289% Seed Oil Mica 77019 Z F   1.973% Ceresin Z B   1.579% Ferric Ferrocyanide 77510 Z F   1.316% Ozokerite Z B   1.315% Microcrystalline Wax Z B   1.053% Tocopherol Z B   0.25% Ascorbyl Palmitate Z B   0.05% 100.0000%

[0042] All of the boats were then sealed. The resulting boats were kept in a heating cabinet at 45° C. for 12 weeks. The weight was determined in each case after 1, 2, 3, 4, 10 and 12 weeks and the weight loss was calculated accordingly. All of the values are average values, owing to the use of a plurality of boats for each test. The boats for this purpose were removed from the heating cabinet and weighed after cooling to room temperature. FIG. 1 shows the weight loss for boats made from untreated wood material, and FIG. 2 shows the weight loss for boats made from wood material treated in accordance with the invention.

[0043] It can clearly be seen that untreated wood is not impervious to volatile hydrocarbons. After just a week, the pencils were significantly drier, and after 10 weeks they were no longer usable. The cores had contracted. The test was therefore discontinued after 10 weeks.

[0044] Conversely, the boats made of wood material treated in accordance with the invention were still impervious even after 12 weeks; the weight loss was minimal. It was found that further criteria, such as decoration, sharpenability, processing, appearance, etc., were positively fulfilled.

EXAMPLE 2

[0045] Different saccharide components according to the invention were tested. For this purpose, wood material was inserted in each case into an impregnating solution as defined in Table 3. The wood material was subsequently processed to boats, in each of which a core was inserted. The composition of the core material embedded into the cedar boats was as follows:

TABLE-US-00002 TABLE 2 |INCI - US |K|K| Value |Unit| Cyclopentasiloxane Z B  36.426% Paraffin Z B  17.142% Iron Oxides 77491/77492/77499 Z F  13.943% Diisostearyl Dimer Dilinoleate Z B   7.464% PEG-6 Beeswax Z B   6.428% Ozokerite Z B     5% Mica 77019 Z F   4.385% Hydrogenated Castor Oil Z B   3.571% Titanium Dioxide 77891 Z F   2.643% Iron Oxides 77491/77492/77499 Z F   0.997% Ceresin Z B   0.714% Bismuth Oxychloride 77163 Z F   0.607% Iron Oxides 77491/77492/77499 Z F   0.38% Tocopherol Z B   0.25% Ascorbyl Palmtate Z B   0.05% 100.0000%

[0046] The boats were then sealed. The resulting boats were kept in a heating cabin at 45° C. for 12 weeks. The weight loss was determined after 1, 2, 3, 4, 10 and 13 weeks. For that purpose, the boats were taken from the heating cabin and, after cooling to room temperature, were weighed. After 13 weeks, the boats were opened and the cores contained therein were investigated for their sharpenability, visual appearance, processing, etc. It was found that in the case of boats whose wood had been impregnated with the saccharide component of the invention, there was virtually no deviation in relation to decoratability, sharpenability, processing, visual appearance, and so on. Conversely, in the case of boats made from untreated wood, it was found that the core had contracted and after just one week was more significantly drier and after 10 weeks was no longer usable.

[0047] In the case of this test, the quality of the wood material was regarded as sufficient in terms of imperviosity if after 12 weeks at 45° C. the weight loss was at most 3% by weight. This value was achieved by all saccharide components according to the invention, as shown in Table 3.

[0048] The compositions and the results are shown in Table 3 below.

TABLE-US-00003 TABLE 3 Acetic Citric Weight loss (%) Sample acid acid Glucose Maltodextrin Fructose PVA 45° C., 12 weeks 1   6.10 (*) 2 16.7 27.8 2.90 3 4.3 6.5 21.5 2.94 4 16.3 1.6 7.1 1 1.98 5 4.9 4.9 14.6 2 1.69 6 2 4 28 1.6 1.97 7 21.3 12 2.46 *Test discontinued after 10 weeks

EXAMPLE 3

[0049] Wood material was inserted into an impregnating solution containing 16.3% by weight of citric acid, 1.6% by weight of glucose, 7.1% by weight of maltodextrin and 1% by weight of PVA in aqueous solution. The wood material was subsequently processed to boats using various core materials, and the boats were then tested as described in Example 1. Core materials used were as follows: the core material of Example 2, the core material with the following composition as per Table 4, and the core material with the following composition as per Table 5:

TABLE-US-00004 TABLE 4 |INCI - US |K|K| Value|Unit| Isododecane Z B  26.515% Iron Oxides 77491/77492/77499 Z F  23.014% Cyclopentasiloxane Z B  10.202% PEG/PPG-19/19 Dimethicone Z B   9.805% Synthetic Wax Z B   8.555% Hydrogenated Polydicyclopentadiene Z B   6.644% Mica 77019 Z F   4.603% C20-40 Alcohols Z B   3.683% Nylon-12 Z B   2.051% Perfluorononyl Dimethicone Z B   1.741% Trimethylsiloxysilicate Z B     1% Polyglyceryl-4 Disostearate/ Z B   0.951% Polyhydroxystearate/Sebacate Polyethylene Z B   0.921% Penterythrityl Tetra-di-t-butyl Z B    0.3% Hydroxyhydrocinnamate Macadamia Integrifola Seed Oil Z B   0.01% Tocopherol Z B   0.004% 100.0000%

TABLE-US-00005 TABLE 5 INCI - US Value Unit Dimethicone 1.5 cSt 25.112 % Synthetic Wax 16.324 % Octyldodecanol 12.557 % Polybutene 12.557 % Cetearyl Behenate 8.79 % Synthetic Fluorphlogopite 6.278 % Disteardimonium Hectorite 5.023 % Sorbitan Olivate 5.023 % Iron Oxides 77491/77492/77499 2.511 % Propylene Carbonate 1.507 % Titanium Dioxide 77891 1.381 % Synthetic Beeswax 1.256 % Iron Oxides 77491/77492/77499 0.753 % Iron Oxides 77491/77492/77499 0.628 % Pentaerythrityl Tetra-di-t-butyl 0.3 % Hydroxyhydrocinnamate 100.0000 %

[0050] After 13 weeks the boats were opened and the cores contained therein were investigated for their sharpenability, visual appearance, processing, etc. It was found that in the case of boats whose wood had been impregnated with the saccharide component of the invention, there was virtually no deviation in respect of decoratability, sharpenability, processing, visual appearance, and so on. The weight loss was determined as described above, and the values found were as follows:

TABLE-US-00006 Table 6 Volatile constituents Volatile Weight loss [%] after in the core constituents 12 weeks at 45° C. average at average 12 Overall Core formula (target) minimum average maximum start [%] Wks/45° C. [%] evaluation Core formula as 36.4% cyclopentasiloxane 1.67 1.99 2.41 37.51 37.20 o. k. per Example 2 Core formula as 26.5% isododecane 2.07 2.34 2.93 36.66 34.99 o. k. per Table 4 10.2% cyclopentasiloxane Core formula as 25.1% dimethicone 1.5 cSt 0.91 1.20 1.89 26.03 25.20 o. k. per Table 5