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Coextrusion waterproof moisture permeable thin-film structure and textile

A waterproof and moisture-permeable, film-structured technology, applied in protective clothing, layered products, synthetic resin layered products, etc., can solve the problems of film clumping and mold blockage, and achieve the effect of overcoming mold blockage and good moisture permeability.

Active Publication Date: 2009-04-22
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] The purpose of the present invention is to use a co-extruded waterproof and moisture-permeable film structure to basically solve the problems of film blockage and mold blockage in the prior art, and to produce a film material with both waterproof and moisture-permeable functions

Method used

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  • Coextrusion waterproof moisture permeable thin-film structure and textile

Examples

Experimental program
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Effect test

Embodiment 1

[0035] In this example, a three-layer co-extruded waterproof and moisture-permeable film structure is obtained by blown film processing, the top surface layer is 20 μm thick LDPE (Taiwan Polymer Chemicals Co., Ltd., 100 plastic NA112-27); the middle layer is 20 μm thick Polyurethane I-80M (Institute of Industrial Technology), which has a hard segment structure TDI and a soft segment structure PEG, the ratio of the two is 0.83:0.17; and LDPE with a thickness of 20 μm on the bottom surface (Taiwan Polymer Chemicals Co., Ltd. -27). The inflation ratio set by the blown film processing method is 2.0. The LDPE of the top surface layer and the bottom surface layer of the film was peeled off, and only the I-80M layer was used for the moisture permeability test such as ASTM E96 BW and JIS 1099 A-2. The obtained data are shown in Table 1. ASTM E96 BW is a method for measuring the moisture permeability of an inverted cup, which is to cover the water cup on the film at 25°C with an exter...

Embodiment 2

[0037] In this embodiment, a three-layer co-extruded waterproof and moisture-permeable film structure is obtained by blown film processing. The top surface layer is 20 μm thick LLDPE 118W (Saudi Basic Industries Corporation); the middle layer is 20 μm thick polyurethane (available from Noveon) 58245); and a bottom surface layer of LLDPE118W (Saudi Basic Industries Corporation) 20 μm thick. The inflation ratio set by the blown film processing method is 2.0. Peel off the top surface layer and bottom surface layer LLDPE 118W of the film, only use The 58245 layer was tested for moisture permeability according to ASTM E96 BW and JIS 1099 A-2, and the obtained data are shown in Table 1.

Embodiment 3

[0039] In this example, a three-layer co-extruded waterproof and moisture-permeable film structure is obtained by blown film processing, the top surface layer is 20 μm thick LDPE (Taiwan Polymer Chemicals Co., Ltd., 100 plastic NA112-27); the middle layer is 20 μm thick Polyurethane (purchased from Noveon's 58237); and LDPE with a thickness of 20 μm on the bottom surface (Taiwan Polymer Chemicals Co., Ltd., 100 plastic NA112-27). The inflation ratio set by the blown film processing method is 2.0. Peel off the LDPE of the top surface layer and the bottom surface layer of the film, only use The 58237 layer was tested for moisture permeability according to ASTM E96 BW and JIS 1099 A-2, and the obtained data are shown in Table 1.

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Abstract

The invention provides a coextrusion waterproof moisture-permeable film structure, which comprises a top surface layer, a middle layer, and a bottom surface layer, wherein the top surface layer and the bottom surface layer comprise polyolefin or polyurethane; and the middle layer comprises the polyurethane. The middle layer is sandwiched between the top surface layer and the bottom surface layer. If the top surface layer and / or the bottom surface layer adopt the polyurethane, the moisture permeability and the air permeability of the polyurethane of the top surface layer and the bottom surface layer are less than that of the polyurethane of the middle layer. The film can be produced through a coextrusion film blowing method or a coextrusion film casting method. Besides, the coextrusion waterproof moisture-permeable film can be adhered to a fabric through an adhesive so as to form a waterproof moisture-permeable textile.

Description

technical field [0001] The present invention relates to a polymer material, more particularly to a co-extruded water-proof and moisture-permeable film structure and textiles using the film structure (Co-extruded water-proof and moisture-permeable film structure and textile). Background technique [0002] Thermoplastic polyurethane (TPU) is a high tensile strength and soft elastomeric synthetic resin, which has the characteristics of wear resistance, low temperature resistance, no cracking, and is not easy to fall off from the surface of the attached object. Its processing does not use solvents and is decomposable, which meets environmental protection requirements and has a wide range of uses, especially in the processing and bonding of textiles and garments. It is quite practical. In film processing, in order to achieve lower thickness (<20 μm) and better uniformity (accuracy ±15%), blown film (blown film) processing is usually used. [0003] Due to the high friction on ...

Claims

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Application Information

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IPC IPC(8): B32B5/14B32B27/32B32B27/40B32B27/28B32B27/12B32B7/12A41D31/02
Inventor 龚丹诚陈瑞鑫张义和
Owner IND TECH RES INST
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