LAMINATE FILM FOR BLOCKING VIRUS AND METHOD FOR MANUFACTURING SAME

Abstract

The present invention relates to a laminate film for blocking a virus and a method for manufacturing same, including a laminate film for blocking a virus in which an air-permeable film layer including 20 to 40 parts by weight of an inorganic filler with respect to 100 parts by weight of a polyethylene resin, an adhesive layer, and a non-woven fabric layer including a bi-component non-woven fabric that is made by mixing at least two selected from polyolefin-based non-woven fabrics, are sequentially laminated, and to a method for manufacturing the laminate film, comprising: a) manufacturing an air-permeable film by stretching a disc-shaped sheet obtained by melting and extruding a compound composition and processing same; b) coating an adhesive on one surface of the air-permeable film which has been stretched; c) adhering, a bi-component non-woven fabric; and d) rolling using rollers.

Claims

1. A laminate film for blocking a virus comprising: an air-permeable film layer including a polyethylene resin and an inorganic filler, an adhesive layer, and a non-woven fabric layer including a bi-component non-woven fabric which is a polyolefin-based mixed non-woven fabric, wherein the air-permeable film layer, the adhesive layer, and the non-woven fabric layer are sequentially stacked.

2. The laminate film for blocking a virus of claim 1, further comprising: an adhesive layer, and a polypropylene spunbond non-woven fabric layer, wherein the adhesive layer and the polypropylene spunbond non-woven fabric layer are sequentially stacked on the other side of the air-permeable film layer.

3. The laminate film for blocking a virus of claim 1, wherein the air-permeable film layer has a basis weight of 10 to 50 g/m.sup.2, moisture permeability of 3,000 to 10,000 g/m.sup.2□24 hr, air permeability of 500 to 1,000 sec, and water pressure resistance of 50 to 100 cm/H.sub.2O.

4. The laminate film for blocking a virus of claim 1, wherein the inorganic filler is any one or two or more selected from the group consisting of calcium carbonate, talc, clay, kaolin, silica, and diatomaceous earth, the inorganic filler having an average particle size of 0.5 to 30 μm.

5. The laminate film for blocking a virus of claim 1, wherein the bi-component non-woven fabric is a mixture of a polyethylene spunbond non-woven fabric and a polypropylene spunbond non-woven fabric.

6. The laminate film for blocking a virus of claim 1, wherein the non-woven fabric layer has a basis weight of 10 to 50 g/m.sup.2.

7. The laminate film for blocking a virus of claim 1, wherein the adhesive layer is formed by an adhesive composition including 50 to 90 wt % of a polyurethane adhesive resin in which a polyether polyol and a polyester polyol are mixed at a weight ratio of 50:50 to 20:80, 0.1 to 10 wt % of an accelerator, 1 to 20 wt % of a solvent, and 5 to 40 wt % of an isocyanate-based curing agent.

8. The laminate film for blocking a virus of claim 7, wherein the adhesive composition has a viscosity of 200 to 2,000 cps/20° C.

9. A virus blocking clothing manufactured with the laminate film for blocking a virus of claim 1.

10. A method for manufacturing a laminate film for blocking a virus, comprising: a) manufacturing an air-permeable film by stretching a disc-shaped sheet obtained by melt-extruding a compound composition for an air-permeable film in an extruder and processing the compound composition through a T-die or a circular die, b) applying an adhesive on one surface of the air-permeable film obtained from the stretching, c) adhering, to the air-permeable film applied with the adhesive, a bi-component non-woven fabric which is a polyolefin-based mixed non-woven fabric, and d) rolling using a roller.

11. The method of claim 10, further comprising: e) applying an adhesive to the other side of the air-permeable film, f) adhering, to the air-permeable film applied with the adhesive, a polypropylene spunbond non-woven fabric, and g) rolling using a roller.

12. The method of claim 10, further comprising, after a), performing a plasma treatment on the air-permeable film.

13. The method of claim 10, wherein the adhesive is applied by using a copper plate of a gravure coater which is engraved into a size of 40 to 250 mesh, and laser-engraved in a line thickness x line spacing x line depth of 0.1 to 1 mm×1 to 10 mm×10 to 150 μm.

14. The laminate film for blocking a virus of claim 1, wherein a plasma treatment is performed on the air-permeable film layer and on the non-woven fabric layer in contact with the adhesive layer.

Description

DESCRIPTION OF DRAWINGS

[0092] FIG. 1 shows a stacked structure of a 2-layered laminate film for blocking a virus of the present invention.

[0093] FIG. 2 shows a stacked structure of a 3-layered laminate film for blocking a virus of the present invention.

[0094] FIG. 3 shows a dry lamination apparatus for manufacturing a laminate film for blocking a virus in the present invention.

[0095] FIG. 4 is a cross-sectional view of a primarily engraved gravure copper plate.

[0096] FIG. 5 is a cross-sectional view of a secondarily engraved gravure copper plate.

BEST MODE

[0097] Hereinafter, Examples will be provided in order to describe the present invention in more detail. However, the present invention is not limited to Examples below.

[0098] Hereinafter, physical properties were measured by the following methods.

[0099] 1) Moisture Permeability

[0100] Moisture permeability was measured by a CaCl.sub.2 method according to ASTM E-96.

[0101] 2) Air Permeability

[0102] Air permeability was measured by a Gurley method according to ISO5636/5.

[0103] 3) Water Pressure Resistance

[0104] Water pressure resistance was measured according to AATCC127.

[0105] 4) Blocking Force against Virus

[0106] A blocking force against a virus was measured according to ASTM F1671.

[0107] The blocking force against a virus was measured according to ISO16604 (“step 5 passed” means the most excellent blocking ability against a virus).

[0108] 5) Adhesive force

[0109] Adhesive force was measured according to ASTM D5034.

Example 1

[0110] 50 parts by weight of calcium carbonate (Yabashi Korea, YK1C) was mixed with 100 parts by weight of low density polyethylene (Hanwha Chemical, HANWHA LDPE 955, MI: 7.5, density: 0.913), melt-extruded, and stretched to manufacture an air-permeable film, wherein a basis weight was 20 g/m.sup.2, moisture permeability was 3,500 g/m.sup.2□24 hr, air permeability was 620 sec, and water pressure resistance was 62 cm/H.sub.2O.

[0111] The air-permeable film manufactured above was introduced into an adhesive applicator, and was applied with an adhesive (SPH-7385, Samho Hwasung) by an application roller. Here, the adhesive was transfer-applied by the application roller, specifically, a copper plate of a 210 mesh gravure coater which was laser-engraved with a grid pattern.

[0112] The air-permeable film applied with the adhesive was transported to a lamination apparatus together with a bi-component spunbond non-woven fabric (a laminate including a polypropylene spunbond non-woven fabric (LPN-30 from UPC Company) and a polyethylene spunbond non-woven fabric (Alstrom) mixed at a weight ratio of 50:50 and having a basis weight of 25 g/m.sup.2) and supplied to one surface of the air-permeable film, compressed (175° C.) by a compression roller, adhered and laminated.

Example 2

[0113] Example 2 was performed in the same manner as in Example 1 except that the same adhesive layer as Example 1 and a polypropylene spunbond non-woven fabric (polypropylene spunbond non-woven fabric (LPN-30 from UPC Company) with a basis weight of 31 g/m.sup.2) formed on the adhesive layer were further added to the other surface of the air-permeable film.

Example 3

[0114] Example 3 was performed in the same manner as in Example 1 except that the mesh was changed to 40.

Example 4

[0115] Example 4 was performed in the same manner as in Example 1 except that the air-permeable film was subjected to a low-temperature plasma treatment. As a result, adhesive force was remarkably increased, and the virus blocking ability was most excellent.

Comparative Example 1

[0116] Comparative Example 1 was performed in the same manner as in Example 1 except that a polypropylene spunbond non-woven fabric (LPN-30 from UPC Company with a basis weight of 25 g/m.sup.2) was used instead of the bi-component spunbond non-woven fabric of Example 1.

Comparative Example 2

[0117] Comparative Example 2 was performed in the same manner as in Comparative Example 1 except that the adhesive layer of Example 1 and the spunbond non-woven fabric of Comparative Example 1 (LPN-30 from UPC Company with a basis weight of 31 g/m.sup.2) were stacked on the other surface of the air-permeable film of Comparative Example 1.

TABLE-US-00001 TABLE 1 Water Moisture Pressure Adhesive Virus blocking Permeability Resistance strength ISO ASTM (g/m.sup.2 .Math. 24 hr) (cm/H.sub.2O) (g) 16604 F1671 Example 1 1,200 100 53 Step 5 Passed Passed Example 2 1,010 150 51 Step 5 Passed Passed Example 3 1,250 100 51 Step 4 Passed Passed Example 4 1,310 130 57 Step 5 Passed Passed Comparative 897 73 52 Step 2 Not Example 1 Passed passed Comparative 714 82 49 Step 3 Not Example 2 Passed passed

DETAILED DESCRIPTION OF MAIN ELEMENTS

[0118] 10: air-permeable film layer

[0119] 20: adhesive layer

[0120] 30: bi-component non-woven fabric layer

[0121] 40: adhesive layer

[0122] 50: polypropylene spunbond non-woven fabric layer

[0123] 60: air-permeable film supply device 61: adhesive tank

[0124] 62: gravure coater 63: pressurized rubber roll

[0125] 64: pressurized auxiliary steel roll 65: drying chamber

[0126] 66: first compression roller 67: second compression roller

[0127] 68: bi-component non-woven fabric supply device

[0128] 69: laminate film winding device for blocking virus