Soft glue is made of plastic by injection molding. It feels soft at room temperature. Many people call it "soft glue", but it does not need to be cured.
Soft rubber：
There is no uniform standard for the classification of soft rubber.
In the general plastic industry, PP,PE and other light proportion, material surface hardness is relatively low plastic known as soft glue.And PS,ABS,AS, hard PVC and other plastics can be called hard glue.
In fact, soft and hard adhesive is only relative, general plastic industry said PE,PP belongs to soft adhesive.However, compared with soft PVC, silica gel,EVA,POE,TPES and other flexible plastics, these materials can be regarded as hard materials.
The characteristics of：
1.Heat resistance properties
Organosilicon products are based on silicon-oxygen (SI-O) bond as the main chain structure. The bond energy of C-C bond is 82.6 kcal/mol, and the bond energy of Si-O bond is 121 kcal/mol in organosilicon. Therefore, the thermal stability of organosilicon products is high, and chemical bonds of molecules under high temperature (or radiation irradiation) do not break or decompose.Silicone is resistant to both high and low temperatures and can be used over a wide range of temperatures.Both chemical properties and physical and mechanical properties change very little with temperature.
2.Weather resistance
The main chain of organosilicone products is -SI-O - and there is no double bond, so it is not easy to be decomposed by ULTRAVIOLET light and ozone.Organosilicon has better thermal stability, irradiation resistance and weather resistance than other polymer materials.The service life of organic silicon in the natural environment can reach several decades.
3.Electrical insulation performance
Organic silicon products have good electrical insulation performance, dielectric loss, voltage resistance, arc resistance, corona resistance, volume resistance coefficient and surface resistance coefficient are among the best insulation materials, and their electrical performance is little affected by temperature and frequency.Therefore, they are a stable electrical insulation material, widely used in the electronics, electrical industry.In addition to excellent heat resistance, organosilicone also has excellent water repellency, which is the guarantee of high reliability for the use of electrical equipment under wet conditions.
4.Physiological inertia
Polysiloxane is one of the most inactive compounds known.They are very resistant to biological aging, have no rejection reaction with animal body, and have better anticoagulant ability.
5.Low surface tension and low surface energy
The main chain of organosilicone is very pliable, and its intermolecular force is much weaker than that of hydrocarbons. Therefore, compared with hydrocarbons with the same molecular weight, the viscosity is lower, the surface tension is weak, the surface energy is small, and the film-forming ability is strong.This low surface tension and low surface energy is the main reason for its various applications: hydrophobic, defoaming, foam stability, anti-adhesion, lubrication, polishing and other excellent properties.
use
Due to the excellent properties mentioned above, organosilicone has a wide range of applications.It is not only used as special materials in aviation, cutting-edge technology, military technology departments, but also used in all sectors of the national economy, its application has expanded to: construction, electronics and electrical, textile, automobile, machinery, leather paper, chemical and light industry, metal and paint, medicine and medical treatment.