Physical modification treatment method of polyurethane foam cotton or foam

Abstract

The invention discloses a physical modification treatment method of polyurethane foam cotton or foam. The method comprises the following steps of: preparing an organic acid buffer solution, wherein the organic acid buffer solution is obtained by mixing an organic acid and salts thereof with water, and the pH value is between 3 and 7; heating the organic acid buffer solution to 25-40 DEG C; soaking the polyurethane foam cotton or foam in the organic acid buffer solution for 1-20 minutes; and then drying the polyurethane foam cotton or foam. The polyurethane foam cotton or foam treated by the method can improve the physical properties of yellowing resistance, phenolic yellowing resistance and the like.

Description

technical field [0001] The invention relates to a physical modification treatment method of polyurethane foam or foam, in particular to a physical modification treatment method which can make polyurethane foam or foam have better anti-yellowing ability. Background technique [0002] At present, polyurethane polymer materials have been widely used in textiles, and are often combined with textile materials in a composite way to exhibit special physical properties, such as polyurethane (PU) synthetic leather and polyurethane foam or padding cloth after lamination of foam or With polyurethane foam or foam thermoformed shoulder pads, collars or bra cups, etc., due to the reaction of phenol structure substances on textiles and nitrogen oxides, the textiles will turn yellow, resulting in a decrease in the value of clothing products. Therefore, it was studied by Courtaulds The phenol yellow test (also known as the Courtauld test) developed by the center is applicable to internationa...

AI Technical Summary

Problems solved by technology

[0003] However, for the polymerization of polyurethane polymer materials, especially polyurethane foam or foam, tertiary amine catalysts are indispensable components, but also because the alkalinity of tertiary amine catalysts accelerates the reaction between substances with phenol structure and nitrogen oxides, so it is common It is extremely difficult for polyurethane foam or foam to pass the phenol yellow test. In order to make polyurethane foam or foam pass the phenol yellow test, that is, to increase its anti-yellowing ability, the current common method in the industry is to select tertiary amines that are easier to migrate Catalysts, and adding acidic substances into the formula, the above two methods will result in lengthening the health care program and delay the shipment schedule, or affect the chemical reaction of polyurethane foam or foam foaming, resulting in reduced process tolerance and increased quality variation, and seriously Industrial safety accidents occurred due to violent acid-base exothermic reaction

[0004] Furthermore, not all polyurethane foams or foams need to increase their anti-yellowing ability, depending on their use. Therefore, if the polymerization process of polyurethane foams or foams is used to change their physical properties, manufacturers will be able to produce polyurethane foams. or foam, it is necessary to have multiple different production processes, which is likely to cause an increase in management and cost