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Vapor permeable waterproof sheet and method for producing the same

A waterproof sheet material and manufacturing method technology, applied in the direction of chemical instruments and methods, synthetic resin layered products, layered products, etc., can solve the problems of water pressure drop, low moisture permeability, water resistance reduction, etc., to achieve comfortable clothing Environment, low water swelling, good waterproof effect

Active Publication Date: 2014-04-16
KOMATSU SEIREN CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the above countermeasures are adopted, there is also a concern that the water pressure resistance will decrease, resulting in a decrease in waterproofness, and there is also concern that the increase in air permeability will result in a decrease in wind resistance and heat retention.
[0011] The moisture-permeable waterproof sheet described in Patent Document 2 has high water pressure resistance and good waterproof performance, but the moisture permeability measured by the calcium chloride method is low, so it is considered that the moisture permeability is not sufficient for practical use.
[0012] Moreover, as the same as the moisture-permeable waterproof sheet described in Patent Document 2, a moisture-permeable waterproof sheet obtained by using a non-porous film, especially a moisture-permeable waterproof sheet having good moisture permeability as measured by the potassium acetate method is known, However, in general, if water adheres to a non-porous membrane with good moisture permeability, it will swell, which will cause a decrease in the strength of the membrane or a decrease in the appearance quality of the moisture-permeable waterproof sheet, etc.
Especially when it is used for windproof outerwear, cape-type raincoats and work clothes that do not use linings that have become popular in recent years, the deterioration of the appearance quality caused by water swelling is particularly likely to become a problem.

Method used

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  • Vapor permeable waterproof sheet and method for producing the same
  • Vapor permeable waterproof sheet and method for producing the same
  • Vapor permeable waterproof sheet and method for producing the same

Examples

Experimental program
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Effect test

no. 1 approach

[0033] (first embodiment (aspect))

[0034] The moisture-permeable waterproof sheet according to the first embodiment of the present invention will be described.

[0035] The moisture-permeable waterproof sheet according to the present embodiment has a polyurethane resin film including a layered porous portion and a layered waterproof portion formed on at least one surface of the porous portion. That is, in this polyurethane resin film, instead of laminating the porous portion and the waterproof portion as another member, the waterproof portion and the porous portion are separately formed in layers in the polyurethane resin film.

[0036]

[0037] The polyurethane resin film includes a layered porous portion and a layered waterproof portion formed on at least one surface of the porous portion. Among them, it is preferable that one side of the polyurethane resin film is a porous part and the other side is a waterproof part.

[0038] The thickness of the polyurethane resin f...

no. 2 approach

[0087] (Second embodiment (aspect))

[0088] The moisture-permeable waterproof sheet according to the second embodiment of the present invention will be described.

[0089] The moisture-permeable waterproof sheet of the present embodiment includes the polyurethane resin film of the first embodiment and a fiber fabric laminated on one surface of the polyurethane resin film. The fiber cloth may be laminated on the polyurethane resin film via an adhesive, or directly laminated on the polyurethane resin film.

[0090]

[0091] The raw material of fiber cloth can be for example: chemical fiber, such as polyester, nylon, acrylic, polyurethane, acetate, rayon, polylactic acid, etc.; natural fiber, such as cotton, hemp, silk, wool, etc.; or their mixed fibers, Blended, interwoven, etc. Moreover, they may be in any form such as textiles, knits, non-wovens, and the like. Furthermore, a porous polytetrafluoroethylene film or the like may be laminated within the range in which the ob...

no. 3 approach

[0106] (Third embodiment (aspect))

[0107] The third embodiment of the present invention is a method of manufacturing a moisture-permeable waterproof sheet, and the following description will be given of this manufacturing method.

[0108] The method for producing a moisture-permeable waterproof sheet according to this embodiment includes: a step of applying a polyurethane resin solution to one side of a release sheet as a support to form a polyurethane resin film (hereinafter referred to as the first step); This polyurethane resin film carries out the step (hereinafter referred to as the second step) of water vapor treatment; And the step (hereinafter referred to as the second step) that the polyurethane resin coating film after water vapor treatment is immersed in water and washed with water, is dried to form polyurethane resin film third step).

[0109] [first step]

[0110] Examples of the release sheet used in the first step include: release fiber fabrics (textiles, kn...

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Abstract

Disclosed is a vapor permeable waterproof sheet which is high in both water vapor permeability determined by a calcium chloride method and water vapor permeability determined by a potassium acetate method. This vapor permeable waterproof sheet is excellent in waterproof properties and hardly damaged in appearance quality since it is suppressed in water swelling. This vapor permeable waterproof sheet comprises a urethane resin film which is composed of a lamellar porous portion with pores having an average size of 0.1-8.0 µm, and a lamellar waterproof portion formed on one or both sides of the porous portion and having a total pore amount less than that of the porous portion.

Description

[0001] Cross References to Related Applications [0002] This application is based on and claims the priority of Japanese Patent Application (Japanese Patent Application) No. 2007-013695 submitted to Japan Patent Office on January 24, 2007 and Japanese Patent Application No. 2007-013696 filed on January 24, 2007, and its The content is combined here. technical field [0003] The invention relates to a moisture-permeable waterproof sheet (sheet) with moisture permeability and water resistance and a manufacturing method thereof. Background technique [0004] Moisture-permeable waterproof sheets that prevent water such as rainwater from entering while allowing moisture to pass through are used in various fields, mainly for clothing such as capa, ski wear, and windbreaker, tents, and shoe materials. [0005] As a moisture-permeable waterproof sheet and its manufacturing method, for example, Patent Document 1 discloses a coated processed cloth in which one side of a fiber cloth ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/40B32B5/18
CPCB32B27/12
Inventor 岛野泰尚中川敏胜大杉裕树中出耕治老松久雄
Owner KOMATSU SEIREN CO
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