A kind of polyurethane blood absorption foam, preparation method and use thereof

Abstract

The invention provides a polyurethane blood-absorbing foam, a preparation method and use thereof. The raw materials of the polyurethane blood absorbing foam are isocyanate, polyol, chain extender, antioxidant, amino-containing polycarboxylic acid polymer, hydrophilic surfactant, diatomite-nano silver / copper composite particles, and water. In the present invention, by introducing amino-containing polycarboxylic acid polymer and diatomite-nano silver / copper composite material into the foaming material at the same time, the prepared polyurethane absorber foam has antibacterial and deodorizing properties, strong blood affinity, and inhibits blood coagulation. It has high safety and can quickly absorb fluid properties such as blood.

Description

technical field [0001] The invention relates to the field of foam material products, in particular to a novel polyurethane blood-absorbing foam, a preparation method and its application in the medical and health field. Background technique [0002] With the improvement of people's living standards, disposable hygiene products, as a daily essential product, have greatly improved their usage and quality requirements. Traditional disposable hygiene products are mainly based on the composite of fluff pulp and high absorbent resin, but there are also some problems, such as SAP cannot be effectively dispersed, and the gel will be blocked after absorbing liquid, which will affect further absorption; in addition, the comfort of the material , the softness also affects the consumer's life experience. In addition, fluff pulp is mainly produced in masson pine materials in the Americas. As a forest wood resource, the output is limited, which limits the output of disposable hygiene prod...

AI Technical Summary

Problems solved by technology

However, this patent uses organotin as a catalyst and dichloromethane as a foaming agent. The residues of the two chemicals will increase the biological toxicity and affect its application in the medical and health field; on the other hand, after absorbing blood such as menstrual blood, itself and Under the induction of microorganisms, it is easy to release unpleasant odors, which greatly affects the user experience

[0006] Invention patent CN110577627A discloses a method for preparing an absorbent material with high absorption capacity. The polyols used in this method are all polyether polyols, and the obtained polyurethane foam will swell severely after sucking blood, and its mechanical properties will drop significantly, which will affect User experience; at the same time, the blood is easy to coagulate after sucking blood, which further reduces the blood absorption capacity

[0008] In addition, after the blood-absorbing foam absorbs blood, it will decompose under the action of itself and bacteria to produce odorous and irritating gases such as ammonia and trimethylamine. At the same time, the high pH will activate some enzyme activities and cause irritation to the skin and mucous membranes. Under multiple stimuli, it is easy to cause wound inflammation, infection, itching, erythema and other inflammatory reactions

Therefore, there is an urgent need to develop effective antibacterial and deodorizing functions for existing high-efficiency blood-absorbing products, and when ensuring the antibacterial and deodorizing functions, it is also necessary to ensure the safety of medical and sanitary products and reduce harm to the human body

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