JPH0441778A - Moisture-permeable waterproof cloth - Google Patents

Abstract

PURPOSE:To obtain the subject waterproof cloth having excellent waterproof and moisture-permeating properties and stable resistance to needle by laminating a continuous porous polytetrafluoroethylene film on the surface of ultrahigh density cloth comprising single fibers having a specific fiber size. CONSTITUTION:A continuous porous polytetrafluoroethylene film is coated with a hydrophilic resin layer having air-diffusible and moisture-permeable properties composed of, e.g. polyurethane resin, and the resultant film is laminated on the surface of an ultrahigh density cloth composed of yarn of single fibers having <=1.5 denier to afford the objective moisture-permeable and waterproof cloth, excellent in waterproof and moisture-permeating properties, and also having resistance to needle without inhibiting performance thereof even in advancing into a fasciculation region of thorn plants.

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention The present invention relates to a moisture-permeable waterproof fabric, which is comfortable to wear and has excellent resistance to needles such as thorny plants. The aim is to provide fabrics that can

(Industrial application field) Breathable waterproof fabric for obtaining garments with excellent needle resistance.

(Prior technology) When fishing in mountain streams or collecting wild vegetables, mushrooms, and chestnuts, it is necessary to enter the spaces between trees where brambles and other thorny plants are growing, and in such cases, the clothes worn are It gets caught in thorny plants, causing damage and, in some cases, damaging the wearer's skin.

Therefore, some research has been done on clothing that can prevent damage caused by thorny plants.
In particular, there are 210 denier, 24 filament, and 6 denier materials that are waterproof, taking into consideration the possibility of wearing them during mountain stream fishing and during the rainy season.
There is a plain woven fabric of 5 x 60 pieces/en coated with a waterproof layer such as vinyl chloride.

Generally, waterproof fabrics like the ones mentioned above are not breathable, so we developed moisture-permeable waterproof fabrics that are laminated with continuous porous polytetrafluoroethylene membranes to make them comfortable to wear even when sweating or during the rainy season. It has been published in Japanese Patent Application Laid-Open No. 60-39014.

(Problems to be Solved by the Invention) Although the above-mentioned conventional waterproof fabrics are preferable because they can be waterproof, they do not have moisture permeability, so they inevitably give a stuffy feeling, and they are not necessarily preferable in terms of needle resistance.

JP-A-60-39014 has a fibrillated polytetrafluoroethylene film with a microporous structure that provides moisture permeability and can greatly reduce the feeling of stuffiness when sweating, but it does not have sufficient needle resistance. do not have. That is, when a person walks into an area with thick thorny plants as described above, the waterproof and moisture-permeable tissue is easily damaged.
There are disadvantages such as water leakage and poor durability.

"Structure of the Invention" (Means for Solving the Problems) The present invention has been developed after studying to solve the problems of the conventional products as described above, It has succeeded in ensuring desirable waterproof and moisture permeable properties, and also prevents the occurrence of pinholes even when punctured by the above-mentioned thorny plants, etc., and has achieved sufficient durability. It is.

(1) A moisture-permeable waterproof fabric characterized in that a continuous porous polytetrafluoroethylene membrane is laminated on an outer fabric made of ultra-high density fabric using yarn composed of single fibers of 1.5 denier or less.

(2) The moisture-permeable waterproof fabric according to claim 1, wherein at least one side of the continuous porous polytetrafluoroethylene membrane is laminated with an air-impermeable, moisture-permeable hydrophilic resin layer.

(Example) To explain a specific embodiment of the present invention as described above, in the present invention, as shown in FIG. It is made by laminating ethylene films 2, and specifically, they are bonded together using adhesive parts 3 with appropriate intervals. The fabric 1 is a plain weave high-density fabric 1a as shown in FIG. 2, and a high-density non-woven fabric 1b as shown in FIG.
etc. can be adopted.

Furthermore, as shown in FIG.
A hydrophilic resin layer 4 is further layered on top of the laminated layer. The hydrophilic resin layer 4 may be interposed between the membrane 2 and the high-density fabric 1.

Specifically, the single fibers forming the high-density fabric 1 or 1a, 1b are in the range of about 0.01 to 1.5 denier, preferably 0.05 to 1.0 denier. shall be.

For example, when raw silk material equivalent to 75 denier polyester is used, the density of the woven fabric is 150 denier.
xlOO books/;n or more, and by setting it above this level, a preferable needle resistance effect can be obtained against thorny plants and the like. The moisture permeability is 3000 g/r/24 hr or more, preferably 5000 g/r/24 hr or more, more preferably 8000 g/r/24 hr or more, and this level is higher than the above-mentioned stretched porous polytetrafluoroethylene membrane. This can be easily secured through recruitment.

The hydrophilic resin layer 4 is an air-impermeable and hydrophilic resin film that does not allow either gas or liquid to pass through properly, but the water vapor concentration (vapor pressure) on one side of the film is It is a hydrophilic material that absorbs moisture from the high side and allows moisture to move to cause desorption or evaporation on the low side by forming a condition where the temperature is high and the other side is lower. , for example, polyether, polyurethane, perfluorosulfonic acid, etc., and more specifically, products such as W, R, Qra (products from 6 companies in the United States, Hypol and E, 1. Naf from Dupont), etc.
ion etc. are known to have such characteristics, and such hydrophilic resins generally allow
By forming the layer with a thickness of 50 .mu.m or less, preferably 5 to 20 .mu.m, more preferably 5 to 15 .mu.m, moisture can be propagated from one surface to the other and ventilation can be blocked. The thickness of the fabric 11a or the high-density nonwoven fabric 1b is generally 0.1 to 1.
．． 0 fl, preferably 0.2 to 0.8 m, more preferably 0.25 to 0.7 m, which together with the above-mentioned denseness ensures needle resistance. The thickness of the stretched porous polytetrafluoroethylene membrane is generally 10 to 120 μm.
m, preferably 20 to 100 μm, more preferably 35
It is appropriate to adopt one with a diameter of ~100 μm.

Production Example 1 Using 0.38 denier single fibers, prepare a 371 fill cloth with 75 d/246 filaments, 250 x 140 filaments/), and use this fill cloth as the outer fabric, with a porosity of 80%.
A needle-resistant, moisture-permeable waterproof fabric according to the present invention was obtained by laminating (adhering) the stretched porous polytetrafluoroethylene membrane with a maximum pore diameter of 0.2 μm and a thickness of 40 μm using known laminating equipment.

Production example 2 Single fiber is 1 denier fine fiber and 60 d/
A plain-woven fabric with 60 filaments and 200 x 140 filaments/) was prepared, and a stretched porous polytetrafluoroethylene membrane was laminated thereon in the same manner as in Production Example 1 to obtain a needle-resistant moisture-permeable waterproof fabric according to the present invention. .

Production Example 3 A nonwoven fabric with single fibers of 0.35 denier impregnated with 30% polyurethane was laminated on the same stretched porous polytetrafluoroethylene membrane as in Production Example 1.2 to produce a needle-resistant, moisture-permeable waterproof fabric of the present invention. Obtained.

Production Example 4 The stretched porous polytetrafluoroethylene membrane in Production Example 1 was coated with polyurethane-based hydrophilic resin to a thickness of 8 μm, and the same fill cloth as in Production Example 1 was laminated as the outer fabric. A non-breathable, needle-resistant, moisture-permeable waterproof fabric according to the invention was obtained.

Furthermore, the following comparative example 1.
2.3 were prepared.

Comparative Example 1 Single fiber 8 denier, 210. d/24 filament, 6
A moisture-permeable waterproof fabric was prepared by laminating 4 x 59 pieces/S of nylon Oxford onto the same stretched porous polytetrafluoroethylene membrane as in Production Example 1.

Comparative Example 2 Single fiber 6 denier, 210d/36 filament, 15
8x68 pieces/! The 3/1 twill was laminated onto a stretched porous polytetrafluoroethylene membrane to obtain a waterproof and breathable fabric.

Comparative Example 3 Single fiber 8 denier, 210d/24 filament, 65
x60/S> nylon oxford with thickness 2
A fabric coated with 0 μm vinyl chloride was prepared.

However, the moisture permeable waterproof fabrics according to the manufacturing examples of the present invention and the comparative examples obtained as described above were tested for moisture permeability and waterproofness, and were placed on a stand with 20 pins set up in the shape of a sword. The following table summarizes the results of a needle resistance evaluation measurement in which the number of leaks was counted by applying a load of 1.5 dazzles to the ground for 30 seconds, then applying a water pressure of 0.2 kg/- to the ground and counting the number of leaks. The product according to the present invention has moisture permeability and waterproofness, as well as excellent needle resistance, whereas the product of Comparative Example 1.2 is said to have waterproof and moisture permeability. The needle resistance was also poor, and the material of Comparative Example 3 was extremely poor in moisture permeability and was also insufficient in needle resistance.

``Effects of the Invention'' As explained above, the present invention is a waterproof fabric that has favorable waterproof and moisture permeable properties and can be comfortably worn when sweating, but also has stable needle resistance and has thorns. It does not impede its performance even if it enters areas with thick vegetation, prevents injury to the wearer, and can produce a fabric with excellent durability. This is a great invention.

[Brief explanation of the drawing]

The drawings show the technical content of the present invention, and include
FIG. 4 is an enlarged cross-sectional view of a part of the fabric of each embodiment of the present invention. In these drawings, 1, la, and lb are respectively high-density fabrics, 2 is a stretched porous polytetrafluoroethylene membrane, 3 is an adhesive portion, and 4 is a hydrophilic resin layer.

Claims (2)

[Claims] (1) A moisture-permeable waterproof fabric characterized in that a continuous porous polytetrafluoroethylene membrane is laminated on an outer fabric made of ultra-high density fabric using yarn composed of single fibers of 1.5 denier or less. (2) The moisture-permeable waterproof fabric according to claim 1, wherein at least one side of the continuous porous polytetrafluoroethylene membrane is laminated with an air-impermeable, moisture-permeable hydrophilic resin layer.