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1. The role of graft compatibility in shoe materials When it comes to shoe materials, many people have headaches for leaking shoes. Especially when it ’s raining or snowing, I do n’t dare to walk on a road with water because of leaking shoes, and it is not a problem to wear rain boots to work. Big head, what's wrong with this shoe leaking? It turned out that most of the...

Type of hot melt adhesive Block and granular hot melt adhesive This hot-melt rubber pellet has the largest output. Blocks are square, round, and grains are flat, diamond, and cylindrical. Colors are light yellow, white, red, black or translucent and colorless. When in use, there should be a melt pot. After melting, it should be scraped, rolled, sprayed or squeezed. Stick hot melt...

Recently, the reporter followed the relevant staff of the Sichuan Provincial Emergency Management Department to directly check the inspection of hidden dangers in the field of hazardous chemicals. According to law enforcement officials from the Department of Emergency Management of Hazardous Chemicals of the Sichuan Provincial Emergency Management Department, Sichuan Province is conducting a...

Water based resins have extremely wide applications, with high added value, and have been listed as the focus of the development of the chemical industry for many years. With the increase of people's awareness of environmental protection, there is a high demand for water-based resins as raw materials. Different water-based resins have their own performance advantages and deficiencies. How...

(1) Surface drying time It refers to the time when the single-component room temperature vulcanized silicone rubber is exposed to the atmospheric environment, and the surface is touched with a finger, and the viscosity is lost. Normally refers to the time distance when the silicone rubber flat sealant is squeezed out to dry under normal conditions, and the surface does not stick to the hand....

There is a phenomenon of foam in sewage treatment. These foams include dense small foams and large and brittle foams. The existence of these foams will block oxygen from entering the water, seriously affecting the growth of aquatic organisms, the operation and operation of the treatment process, and the quality of the effluent water. So, under what circumstances will the sewage foam? What are...

Basic composition of cement mortar The concrete is composed of cement, sand and water. In order to ensure that the concrete has certain strength and various properties required, chemical additives will be added to the cement mortar to improve the performance of the concrete, such as: waterproof agent, water reducer, antifreeze, release agent, dispersant, thickener. Foaming factors of...

Hot melt adhesive is one of the most environmentally friendly and suitable for high speed automatic assembly line operations. Today's automobile industry is developing rapidly. Especially in China, the sales volume of automobiles in 2013 exceeded 20 million. It has become the world's largest automobile production and sales country. With the improvement of the automatic level of...

Potting materials, also known as potting or potting, refer to the isolation of circuits or wiring from harmful substances such as moisture and atmospheric pollutants, protecting them from thermal stress or mechanical stress, and providing high-voltage insulation properties. Water seal protection material in the circuit or wiring. The following Zhuo Xuanyang will answer some of the common...