Preparation method of figured islands-in-sea wool suedette interior trim leather of car

Abstract

The invention relates to a preparation method of figured islands-in-sea wool suedette interior trim leather of a car. The preparation method comprises the following steps: (a) opening 100% of 3.5Dx51mm Dacron figured islands-in-sea fibers through a nonwoven opening machine; (b) needling vertically so that the fibers are entangled and occluded to form a fabric; (c) transporting the fabric to a fibrewoven machine for surface finishing, and then ironing the fabric by adopting a heat roller with temperature of 110-120 DEG C at speed of 10-15m / min; (d) soaking the ironed fabric into polyving akohol solution with temperature of 80-90 DEG C and mass concentration of 8-10%, then soaking in waterborne polyurethane dispersoid, drying at 110-115 DEG C, and placing into deionized water with temperature of 80-95 DEG C for removing polyvinyl alcohol, thus obtaining suedette, namely Beth; (e) soaking the Beth into NaOH or KOH solution with mass concentration of 5-10%, wherein the pick-up ratio is 100%; adjusting the pH till the pH is neutral, and drying; (f) dyeing and drying; and (g) carrying out sanding treatment. With the adoption of the preparation method, polyvinyl alcohol can be removed in alkaline solution, and thus the suedette interior trim leather with good breathability is obtained.

Description

technical field [0001] The invention belongs to the field of polymer materials, and relates to a method for preparing automotive interior leather, in particular to a method for preparing suede-like interior leather of velvet. Background technique [0002] The development process of artificial leather has gone through six major technological changes. From the first generation of woven fabrics coated with polyvinyl chloride resin, the second generation of warp-knitted fabrics coated with polyurethane to the third generation of ordinary staple fiber non-woven fabrics coated with polyurethane, collectively referred to as synthetic leather. [0003] The fourth generation uses the indefinite island staple fiber non-woven base fabric, and the leather produced is called indeterminate island microfiber leather. Indeterminate island staple fiber is usually made of polyamide and polyethylene blended at a ratio of 50:50 to make a non-woven base fabric, and then toluene is used to draw ...

AI Technical Summary

Problems solved by technology

[0004] The leather based on the non-woven fabric produced by Dingdao sea island fiber belongs to the fifth generation of artificial leather. The leather produced is called Dingdao microfiber leather. Its production technology is complicated and the processing is difficult.

Due to the use of fixed island sea-island fibers, the final dyeing effect of the product is much higher than that of indefinite island products. In addition, because toluene is not used in the process, the product has no toluene residue, but due to its own process characteristics, the dimensional stability, physical indicators and flexibility are relatively high. Difference

At present, suede leather is also used for car seats. The reason is that suede leather has good air permeability and moisture permeability. However, suede leather is not environmentally friendly and expensive to use in batches; although the fabric can meet the requirements of breathability and dimensional stability, However, due to low performance, inelasticity and toughness, it is generally used in low-end economical cars, and cannot meet the high-performance and high-end requirements of car manufacturers.