Manufacturing method for flame-retardant polyurethane artificial leather

Abstract

The invention relates to the technical field of artificial leather production, in particular to a manufacturing method for a flame-retardant polyurethane artificial leather. The method includes manufacturing base cloth, wherein the raw materials comprise the following components in parts by weight: 70-100 parts of hydroxyl-terminated polybutadiene, 70-100 parts of methylene diphenyl diisocyanate,5-10 parts of vinyltriethoxysilane, 2-10 parts of silane coupling agents, 0.1-0.2 part of dibutyltin dilaurate, 3-5 parts of flame retardants, 5-10 parts of carbon nanotubes, 5-10 parts of hydrophobicfumed silica, 0-5 parts of gardenia fruit juice and 5-10 parts of Silane-based terminated polyether; manufacturing resin layer raw materials, wherein the resin layer raw materials comprise 100 partsby weight of polyurethane elastomer, 0-10 parts by weight of plasticizers, 1-3 parts by weight of compatilizers, 0-20 parts by weight of fillers, 5-10 parts by weight of flame retardants and 3-5 partsby weight of gardenia fruit juice; preforming tape casting coating forming. The invention provides the manufacturing method for the full flame retardant artificial leather, and avoids the influence of an organic phosphine flame retardant on quality in the prior art.

Description

technical field [0001] The invention relates to the technical field of artificial leather production, in particular to a method for preparing flame-retardant polyurethane artificial leather. Background technique [0002] Polyurethane artificial leather is widely used instead of genuine leather because of its close to genuine leather feel and lower cost than genuine leather, and can also achieve a more beautiful appearance. However, polyurethane artificial leather has poor flame retardancy and will burn when exposed to open flame or high temperature baking At present, the common method to solve its poor flame retardancy is to coat the surface of the artificial leather with a flame-retardant layer, or add a flame-retardant material to the surface layer of the artificial leather, and prevent the flame from spreading to the base fabric through the flame-retardant material. , to prevent the artificial leather from burning, but once the flame starts to burn from the base cloth lay...

AI Technical Summary

Problems solved by technology

[0002] Polyurethane artificial leather is widely used instead of genuine leather because of its close to genuine leather feel and lower cost than genuine leather, and can also achieve a more beautiful appearance. However, polyurethane artificial leather has poor flame retardancy and will burn when exposed to open flame or high temperature baking At present, the common method to solve its poor flame retardancy is to coat the surface of the artificial leather with a flame-retardant layer, or add a flame-retardant material to the surface layer of the artificial leather, and prevent the flame from spreading to the base fabric through the flame-retardant material. , to prevent the artificial leather from burning, but once the flame starts to burn from the base cloth layer, the flame retardant performance of the artificial leather will lose its effect, causing irreparable losses to the user, and the current way of artificial leather only adding flame retardants to the surface layer makes Artificial leather is prone to attenuation of flame retardant effect during long-term use, resulting in the loss of flame retardant effect of artificial leather after long-term use, and low fire safety factor

[0003] The invention of authorized notification number CN 106087389 B discloses a preparation method of flame-retardant polyurethane synthetic leather, 12g of thermoplastic polyurethane and 3g of styrene-butadiene-styrene block copolymer, styrene-ethylene-butylene- Styrene block copolymer 3g, polyamide type thermoplastic elastomer 7g, coloring agent 2g and substance A2g are extruded through an extruder at 90-370°C to obtain a polyurethane film with a thickness of 0.8mm; before the modified polyurethane film is cooled It is combined with the flame-retardant base cloth by extrusion roller under the pressure of 1.0Mpa, and then embossed by the roller with texture under the pressure of 0.2Mpa. After cooling, the primary synthetic leather is obtained; The primary synthetic leather is surface treated with a water-soluble silicone oil solution at 90°C, and dried in an oven at 110°C to obtain a flame-retardant polyurethane synthetic leather. There are two disadvantages: one is that the surface of the base fabric is only treated with flame retardant, and after long-term use and friction, the flame retardant material on the surface will fall off and lose the flame retardant function; the other is that the flame retardant is organic phosphine flame retardant Although the flame retardant effect is good and it is more environmentally friendly, it has the inherent problems of high volatility, poor thermal stability, poor light stability and poor compatibility with polymers, which affect the later quality of artificial leather.