Low temperature hot melt adhesive
Low temperature Hong Kong treasure It's used for fixing the heel at the bottom of the heel. The material used is somewhat like cardboard. It's hard. It only uses glue when fixing low temperature port treasure and shoes. Classification of low temperature Hong Kong treasure
The low temperature port is generally divided into three kinds of materials.
1. The low temperature port [1] of the skin pulp
The method of soaking and softening is not only the material of low temperature port, but also the softening method used to make leather shoes before hand. Now, Italy leather shoes have been trapped in traditional ideas and used this kind of low temperature port treasure which does not accord with economic benefits.
2, chemical film low temperature Hong Kong treasure
The soaking solvent (toluene) softening method; this kind of cryogenic port leaching solvent can be softened, which is one of the revolutionary shoes in the shoe industry in recent years. The characteristics of soaking solvent can be very soft, the most conducive to the shoe molding, do not add or enhance any treatment, drying and cooling can reach the effect of stiffness, widely used for the shoe industry. The advantages of cheap, easy molding. Disadvantages: thick, forming a long time. The elasticity is the worst.
3, hot melt adhesive low temperature Hong Kong treasure
The heating and softening method is to use the heating (about 100 degrees to 120 degrees) to soften the hot melt adhesive which is placed in front of the shoes in advance, so as to facilitate the forming. The advantages are fast, thin and elastic, which is better than the commonly used low temperature port.
In addition, when making climbing shoes and safety shoes, there are also iron sheets and other special materials to be used as low temperature jewel.
The development trend and Prospect of hot-melt glue Hong Kong treasure:
Hot-melt film (Hong Kong treasure) is one of the most important materials for shoe making, with a huge demand. The traditional leather and port chemicals are made by immersion softening method and foam solvent (toluene) softening method, but the products are thicker, the molding time is long, and the elasticity is very poor. Besides, the operation process is much more time-consuming and laborious, which is not economic. And a stupid body is harmful to the skin and mucous membrane. It has an anesthetic effect on the central nervous system. Therefore, the traditional Hong Kong treasure belongs to the product which is neither environmentally friendly nor economically backward. The low temperature hot-melt film in the last two years is the best substitute for the traditional Hong Kong treasure.