A kind of high-strength soft permeable cotton and its preparation process and cotton products

Abstract

The invention relates to the technical field of polyurethane foam materials, and discloses a high-strength and soft permeable cotton, which solves the problem that the existing permeable cotton has low strength and is easy to be torn and damaged to cause wrinkles. It includes the following mass parts of raw materials mixed and foamed Obtain: 20-40 parts of polyether polyol, 3.5-4.8 parts of polyether, 5-7 parts of silicone oil, 24-40 parts of isocyanate, 8-12 parts of nano-tetrafluoroethylene powder with volume equivalent diameter of 400nm, 3 parts of water ~5 parts, catalyst 1~1.2 parts, polydimethylsiloxane 8~12 parts, vaporizing agent 2~10 parts, antioxidant 0.3~0.7 parts, vaporizing agent is dichloromethane or dichloroethane; composite catalyst Trimethylamine, triethylenediamine and stannous octoate are mixed at a mass ratio of 1:3:10. The obtained permeable cotton improves the tear resistance of the permeable cotton while maintaining the soft and permeable characteristics of the permeable cotton, and strengthens the permeable cotton. wrinkle resistance; also discloses the permeable cotton of the present invention and the cotton products made from the permeable cotton of the present invention, the cotton bale is permeable, breathable and wrinkle-resistant for a long time, and the finished product has a long service life.

Description

technical field [0001] The invention relates to the technical field of polyurethane foam materials, in particular to a high-strength and soft permeable cotton, its preparation process and cotton products. Background technique [0002] Polyurethane foam material, also commonly known as polyurethane foam sponge, is obtained by mixing and foaming polyether polyol and isocyanate. Among them, polyurethane soft foam material, as a kind of polyurethane material, is widely used in fabric composite materials, such as shoulder pads, bra sponges, cosmetic sponges and toys, thus extending modified materials with their own characteristics. [0003] For example, the Chinese patent with application publication number CN104817681A "Formula and Foaming Manufacturing Method of Water-permeable Polyurethane Underwear Cup Sponge" discloses a water-permeable polyurethane material based on the original polyether polyol and isocyanate mixed foam , Add organosiloxane hydrophilic agent to the raw ma...

AI Technical Summary

Problems solved by technology

[0004] However, in actual use, its non-wrinkle characteristics are time-sensitive, and the possibility of machine washing wrinkles after a period of use is greatly increased

After adjustment, it is found that the problem comes from two aspects. First, the water-permeable polyurethane material itself has a large amount of compression set, and there is an unrecoverable amount in the process of compression deformation and recovery at the bend. accumulate, causing wrinkles

On the other hand, because the polyurethane foam material is wrapped with fabric after the actual production of the finished product, the two are machine washed together or the polyurethane foam material is also subjected to tearing force during daily use, and the inside of the polyurethane foam material is torn and damaged, resulting in its The strength is further reduced, and the amount of compression set increases, so wrinkles will be more likely to occur

Finally, the strength of the underwear cups and toys made of the polyurethane foam material decreases significantly after a period of use, and wrinkles are easy to occur

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