High-flexibility synthetic leather sizing agent and preparation method thereof

Abstract

The invention relates to a high-flexibility synthetic leather sizing agent and a preparation method thereof. The high-flexibility synthetic leather sizing agent comprises the following components in parts by mass: 80-95 parts of solvent type polyurethane resin, 6-8 parts of 3,3-disulfonhydrazide diphenyl sulfone, 4-5 parts of fatty acid amide, 2-4 parts of epoxy resin, 10-15 parts of gladiolus leaves, 5-8 parts of akanthikon powder, 1-2 parts of dibutyl phthalate, 20-35 parts of acetone and 25-28 parts of bentonite. The synthetic leather sizing agent with the solvent type polyurethane resin as a main body is fine and smooth, a finished product of synthetic leather is flexible and natural, is soft in hand feeling, has an appearance of good real leather features, and is good in elasticity, excellent in adhesion property and good in abrasion resistance, deflection resistance, aging resistance and mold resistance. After fibers are implanted, the connection strength of the synthetic leather can be enhanced, and the problem that polyurethane resin is too soft is solved, the texture of the synthetic leather is better, and the prepared synthetic leather is approximate to natural leather in quality.

Description

technical field [0001] The invention relates to the technical field of slurry for artificial leather, in particular to a highly flexible synthetic leather slurry and a preparation method thereof. Background technique [0002] However, with the growth of the world's population, the human's demand for both the total amount and the type of leather has doubled, and the limited amount of natural leather has long been unable to meet this demand of people. So scientists began to develop synthetic leather. [0003] Synthetic leather simulates the composition and structure of natural leather and can be used as a plastic product for its substitute material. In the production process of synthetic leather, the impregnated non-woven fabric is usually used as the mesh layer, and the microporous polyurethane layer is used as the grain layer. Its front and back are very similar to leather, and has a certain degree of air permeability, which is closer to natural leather than ordinary artif...

AI Technical Summary

Problems solved by technology

[0004] However, the existing synthetic leather generally has the following disadvantages: 1. Usually, it can only be cleaned by dipping in water and cleaning with detergent, and gasoline cannot be used to completely remove stains, and dry cleaning cannot be used.

2. When washing with water, the water temperature should not exceed 40°C. However, the cleaning effect of low-temperature water washing is not good, and the best performance of the detergent cannot be exerted.

3. It cannot be exposed to the sun, so synthetic leather is easy to age and has poor weather resistance, and the use effect is not good in high temperature areas in the world

4. Due to the properties of synthetic leather, most synthetic leather cannot be exposed to organic solvents and is easily corroded

5. Synthetic leather is not resistant to folding, and will crease and crack after folding, especially in a humid environment

6. Synthetic leather is easy to stretch and start to mold in a humid environment, so the storage conditions are harsh