Waterproof and breathable coated fabric and preparation method thereof

Abstract

The invention discloses a waterproof and breathable coated fabric and a preparation method thereof. The preparation method of the waterproof and breathable coated fabric comprises the following steps of: (1) water repellency treatment: dipping a fabric into a dipping liquid tank containing a Teflon waterproofing agent for 10-30 seconds, drying and baking; (2) calendering treatment: carrying out calendering treatment on the baked fabric by using a calender; (3) coating a primer: coating the primer on the surface of the calendered fabric; and (4) coating a top coat: coating the top coat on the surface of the primer of the fabric. The preparation method of the waterproof and breathable coated fabric disclosed by the invention has the advantages of shorter technological process, energy saving and CO2 emission reduction, low cost in investment and processing, and thus, the preparation method has more competitive advantages; and the waterproof and breathable coated fabric prepared by the preparation method can manage the moisture on the surface of a human body, the moisture management is in direct influence on wearing comfort, and the functional textiles are attractive in appearance, are breathable and have certain protective functions.

Description

technical field [0001] The invention relates to a fabric and a preparation method thereof, in particular to a waterproof and breathable coated fabric and a preparation method thereof. Background technique [0002] In short-term sports and durable sports, the performance of clothing mainly refers to comfort. In outdoor sports, clothing should be able to resist external factors, such as strong winds, sunlight, rain and snow, and at the same time help maintain the body’s heat balance with the outside world , that is, when the body's metabolism speeds up, clothing can help the body dissipate heat and perspire. [0003] With the development of high-functional coating and laminated fabric production technology, the performance of functional textiles has been greatly improved, especially the ability to manage the moisture on the human body surface, and moisture management directly affects the comfort of wearing. These functional textiles are beautiful in appearance, It is breathab...

AI Technical Summary

Problems solved by technology

b. There are many factors affecting the replacement process. In addition to the structure of the polyurethane molecule, some additives (mainly the type and concentration of the surfactant) also have a significant effect, as well as processing conditions (such as the temperature of the coagulation bath, DMF concentration, residence time, etc.), because these factors are mutually restrained, it is not easy to control correctly, and there are many patent documents in this area

c. DMF solvent problem: 1. Detection and control of DMF concentration: In order to control the DMF concentration in the tank, a refractometer is installed on the equipment to read the DMF concentration, and at the same time, the stability of the DMF concentration is adjusted by controlling the added soft water. within the range

2. DMF solvent safety issues: DMF is harmful to the human body, and labor protection measures are indispensable. Operators should wear protective gloves, glasses, etc.

3. The problem of expensive recycling equipment: Generally, two wet coating machines must be equipped with one DMF solvent recovery processor, which is expensive and increases equipment costs

Obviously, the existing technology has the defects of low water pressure resistance and strict requirements for processing technology control

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