Moisture-permeable waterproof film, composite material, and processes for producing these

Abstract

The invention relates to a moisture-permeable waterproof film characterized by comprising a resin layer which comprises two or more resins made up of monomer units comprising bishydroxyalkylfatty acid units and polyalkylene glycol units, the content of the bishydroxyalkylfatty acid units in each resin being 0.08 to 0.5 mmol per gram of the resin on a solid basis and the content of the polyalkylene glycol moieties in each resin being 40 to 80 wt.% on a solid basis, and by having a moisture permeability of 3*10<3> to 200*10<3> g / m<2>24 h as measured by the potassium acetate method (method B-1) in accordance with JIS L-1099 when the film has an average thickness of 20 micron; and a moisture-permeable waterproof composite material which comprises a base and the film disposed at least on one side thereof and has a moisture permeability of 1*10<3> to 50*10<3> g / m<2>24 h as measured by the potassium acetate method (method B-1) in accordance with JIS L-1099. Polymers which are excellent in moisture permeability, waterproofness, and durability and can be produced in the form of a water-compatible resin are used. Because of this, the moisture-permeable waterproof film and composite material can be produced by a process in which the burden to be imposed on the environment is lessened.

Description

technical field

[0001] The present invention relates to a moisture-permeable waterproof film and a composite material that can be manufactured with less environmental pollution by using a water-compatible polymer with excellent moisture permeability, water resistance, and material durability. More specifically, the present invention relates to outdoor products such as fishing and mountaineering clothing, ski clothing, Windproof outerwear, sporting goods, golf equipment, tennis equipment, raincoats, travel coats, clothing for outdoor work, gloves and shoes, clothing materials, so-called wallpaper and building materials such as roof waterproof sheets and tiles, so-called Moisture-permeable waterproof films and their composite materials in the field of non-clothing materials for electronic machinery and equipment components such as film substrates for dehumidifiers. Background technique

[0002] In the past, in order to obtain moisture-permeable waterproof films and composite ...