Process for preparing hot melt adhesive elastic grid by plastic uptake method

Abstract

The invention discloses a process for preparing a hot melt adhesive elastic grid by a plastic uptake method. The process comprises the following steps: placing a hydrogenated styrene-butadiene block copolymer and white oil in a heating stirrer according to a specific proportion, stirring and filling oil, adding polypropylene, silicon dioxide anti-blocking master batch, an antistatic agent and an antioxidant after oil filling is completed, and continuously stirring; and casting the uniformly mixed raw materials into a film through a single-screw extruder, and meanwhile, carrying out vacuum plastic uptake on the cast film through a nickel net with square holes, so as to prepare the hot melt adhesive elastic grid. According to the invention, the hydrogenated styrene-butadiene block copolymer with low melting point and high melting index is used as a matrix material, so that the fabric can be compounded without discoloring and hardening; and the cast film is subjected to vacuum plastic uptake through the nickel net with the square holes to form a grid which is of a #-shaped structure and of which the transverse and longitudinal stems are vertical, so that the transverse and longitudinal mechanical properties can be exerted under the condition of ensuring the ventilation effect, and the cast film has higher tensile strength, thereby meeting the use requirements of the shaping clothes.

Description

technical field [0001] The invention relates to the preparation of elastic hot-melt adhesive nets for shaping clothes, in particular to a process for preparing hot-melt adhesive elastic nets by blistering. Background technique [0002] Shapewear is made with ergonomics, and it is a kind of adjustable functional underwear, so it is also called shapewear, corsets, shapewear, etc. It is soft to the touch, good in resilience, and good in shape. At present, in the preparation process of shaping clothes on the market, polyurethane film or glue net is mainly used, but this type of glue has some defects, such as: [0003] 1. The proportion of polyurethane is relatively high, at 1.2g / cm 3 , which is a relatively high material in plastics, and polyurethane with a higher grammage will affect the feel; [0004] 2. Polyurethane generally has poor yellowing resistance. At present, the yellowing time is mainly extended by adding UV additives in the industry, but for some white or light-c...

AI Technical Summary

Problems solved by technology

[0003] 1. The proportion of polyurethane is relatively high, at 1.2g / cm 3 , which is a relatively high material in plastics, and polyurethane with a higher grammage will affect the feel;

[0004] 2. Polyurethane generally has poor yellowing resistance. At present, the yellowing time is mainly extended by adding UV additives in the industry, but for some white or light-colored fabrics, the yellowing time is only delayed by adding UV additives, and Can not improve the yellowing resistance of the fabric;

[0005] 3. Polyurethane omentum fibers are irregular in the form of non-woven fabrics, so the tensile strength and recovery rate will be greatly reduced, thus failing to achieve the desired effect of shapewear

[0006] The above problems will lead to a decrease in the texture of the shapewear, which is not durable, and it is difficult to achieve the ideal use effect of the shapewear, thus failing to meet the needs of consumers