A waterproof and wrinkle-resistant polyurethane foam breast cup and its preparation process

Abstract

The invention relates to the technical field of bra underwear, in particular to a waterproof and crease-resistant polyurethane foaming bra cup and a preparation process thereof. The bra cup comprisesa foaming bra cup core layer, a waterproof layer, a water-based finish paint layer and a water-based release paint layer which are sequentially arranged from inside to outside, the foaming bra cup core layer and the waterproof layer are both made of composite PU materials in a foaming forming mode. The composite PU material is prepared from the following raw materials in parts by weight: 65-75 parts of polyol, 40-50 parts of diphenylmethane diisocyanate, 3-7 parts of acrylate, 0.2-0.5 part of hydroquinone, 12-15 parts of a plasticizer, 8-12 parts of a filler, 0.3-0.8 part of a catalyst, 15-20parts of a foaming agent, 0.3-1.0 part of a foam stabilizer, 5-8 parts of a curing agent and 25-30 parts of a solvent A. The foaming bra cup is light in weight, good in waterproofness, capable of forming a waterproof layer through self-skinning, good in crease resistance, degradable in material, environmentally friendly, safe, good in physical and mechanical strength, good in weather resistance, soft and comfortable.

Description

Technical field [0001] The invention relates to the technical field of bras and underwear, and in particular to a waterproof and anti-wrinkle polyurethane foam breast cup and its preparation process. Background technique [0002] Current bra cups are basically made of sponge, upright cotton and other materials that are bonded to the fabric and molded to form the shape of the cup. However, since sponges are prone to bacteria and contain toxic ingredients, wearing a breast cup containing sponge ingredients for a long time will cause problems. It is easy to affect women's breasts and cause breast diseases; in addition, breast cups made of sponge, upright cotton and other materials have low waterproofness and are difficult to dry after absorbing water. When used on swimsuits and other clothing, the wear resistance of the swimsuit after absorbing water will be increased. Weight affects the feeling of wearing and using. [0003] In addition, for breast cups made of waterproof mat...

AI Technical Summary

Problems solved by technology

[0002] The current breast cups basically use materials such as sponge and standing cotton to fit the cloth, and form the shape of the breast cup by molding. However, because the sponge is easy to breed bacteria and itself contains toxic components, long-term wear of the breast cup containing sponge components, It is easy to affect women's breasts and cause breast diseases; in addition, breast cups made of sponge, upright cotton and other materials have low water resistance and are difficult to dry after absorbing water. Weight affects the feeling of wearing

[0003] In addition, for breast cups made of waterproof materials, there are currently silicone breast cups on the market, but silicone breast cups have poor air permeability and heavy weight, which greatly reduces the feeling of use.

For polyurethane foam breast cups, the current manufacturing process is to first foam the polyurethane material, then slice it, then mold it into a breast cup shape, and finally attach a waterproof membrane. Uneven thickness leads to uneven thickness of the final molded polyurethane foam breast cups, which makes it difficult to achieve the consistency of each polyurethane foam breast cup, which affects the wearing and use feeling of both breasts; Only the outer and inner sides can be waterproofed, and the edge of the polyurethane material cannot be waterproofed, making it easy for moisture to seep from the edge of the polyurethane foam breast cup

Furthermore, traditional polyurethane foam breast cups have low weather resistance. After being sliced, they are molded at high temperature, which makes the polyurethane prone to overall hardening and reduces the wearing feeling of polyurethane foam breast cups.

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