Question 7. What is the communication responsibility of exporters whose products contain SVHC less than 0.1% wt / wt? Answer: If the exported product contains SVHC less than 0.1% wt / wt, the exporte......
2020-03-13Question 4.How to calculate 0.1% wt / wt? Answer: 0.1% wt / wt is calculated on the basis of percentage. It can be the amount of SVHC existing in the total weight of the product or the amount of SVHC......
2020-03-13Question 1. What is SVHC? Answer: SVHC is a substance of great concern. The European Chemicals Agency ECHA frequently updates the candidate list for SVHC. The SVHC list is updated 2-3 times a year, a......
2020-03-13Main glue The normal mix should be the system of natural rubber NR or IR with styrene butadiene rubber and butadiene rubber, which is mainly a system of butadiene rubber. At present, most factories a......
2020-03-12One. material The influence of materials on physical properties is very large. At present, China's vulcanized shoe additives have developed rapidly. In terms of general materials, it can basically re......
2020-03-12Typical use of silicone gel: 1. Precision electronic components 2. Module power supply and circuit board potting protection with high transparency and restoration requirements Use of silicone gel......
2020-03-12Definition of silicone gel: The silicone gel is frosted glass-like translucent particles. Insoluble in water and inorganic acids, but soluble in hydrofluoric acid and concentrated caustic soda soluti......
2020-03-12Rubber additives are generally divided into six categories. The first category is vulcanization system additives, mainly vulcanizing agents, accelerators and activators Vulcanizing agents include: ①......
2020-03-121.SEBS can produce elastomers with Shore hardness A0 ~ 95 by mixing with polypropylene, naphthenic oil or hydrogenated naphthenic oil, white oil, etc. Such elastomers have excellent surface texture an......
2020-03-11SEBS is the hydrogenation product of thermoplastic elastomer SBS, often referred to as hydrogenated SBS. This hydrogenated SBS has a high content of 1,2 structure, and after hydrogenation, it is......
2020-03-11Used as adhesives for corrugated paper, metal preservatives, water softeners, detergent auxiliaries, refractory materials and ceramic raw materials, bleaching, dyeing and pulping of textiles, mine ......
2020-03-11It is used to make various silicate products such as silica gel, white carbon black, zeolite molecular sieve, sodium metasilicate pentahydrate, silica sol, layer silicon and instant powder sodium sili......
2020-03-111. In the field of light industry: Water glass is an indispensable raw material in detergents such as washing powder and soap, as well as water softener and sedimentation aid; Used in the textile in......
2020-03-111. The shrinkage of the product increases with the increase of the rubber content. 2. The shrinkage of the product changes into a saddle shape with the hardness after vulcanization. It rises sharply ......
2020-03-10The second is the non-contact method, which generally uses an infrared thermometer, which has been used since the 1960s. This method determines the surface temperature of the measured object by measu......
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