High-strength soft water-permeable cotton and preparation process thereof, and cotton product

Abstract

The invention relates to the technical field of polyurethane foam materials and discloses high-strength soft water-permeable cotton. The high-strength soft water-permeable cotton overcomes the problemthat existing water-permeable cotton is low in strength and prone to generation of wrinkles due to damage by tearing. The high-strength soft water-permeable cotton is prepared by mixing and foaming the following raw materials in parts by mass: 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 nanoscale tetrafluoroethylene powder with the volume equivalent diameter of 400 nm, 3-5 parts of water, 1-1.2 parts of a catalyst, 8-12 parts of polydimethylsiloxane, 2-10 parts of a vaporization agent and 0.3-0.7 part of an antioxidant, wherein the vaporization agent is dichloromethane or dichloroethane, and the composite catalyst is formed by mixing trimethylamine, triethylenediamine and stannous octoate according to a mass ratio of 1: 3: 10. The obtained water-permeable cotton is improved in tear resistance and wrinkle resistance while maintaining the characteristics of softness and water permeability of the water-permeable cotton. The invention further discloses the water-permeable cotton and a cotton product prepared from the water-permeable cotton. A cotton bale of the water-permeable cotton is water-permeable, air-permeable and crease-resistant for a long time, and the service life of the prepared finished product is long.

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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