Silicone pencil case silicone tray organic silicone sealant products how to choose

by:Smily Mia     2020-11-04
Silica gel, pencil case, silicone tray is made of silicate polycondensation, avirulent insipidity, chemical performance is very stable, not any response from the acid and alkali salt. Because the silicone is colloid structure, has a number of microporous and, for water has a strong absorption ability. So silicone pencil case, silicone tray can be used as food, medicine, daily necessities of the desiccant for external use only, because the silicone is after refining of raw materials production and sterilization, and won't have side effect to human body. Chemical bonding agent of organic silicone sealants how to choose the products on the market at present commonly used prefabricated building sealant the types and features of silane modified polyether sealant ( smp) Based on the silicon alkyl polyether polymer preparation of sealant. The product has good flexibility, low pollution and other characteristics, and concrete slabs, stone and other building materials bonding effect is good. Silicone rubber ( sr) Tades polyethylene dimethoxy silane as the main raw material preparation of sealant, the sealant has good elasticity, good cold, but also has some drawbacks, such as poor finishing. Prefabricated building sealant performance requirements and selection of mechanical properties of weatherability jgj1 2-1 24 'the technical specification for concrete structures of prefabricated,' stated in building joint waterproof sealing material should be chosen weatherability, if improper material selection, will affect the prefabricated building sealing performance and service life, causing sealant craze, cause leakage, serious and even disable appear shortly after assembling sealant, and the safety of the buildings. The main chain of the polyurethane adhesive contains a large number of c - N key, compared with silicone rubber and modified polyether rubber, the key to a minimum. In the sun for a long time, the c - polyurethane molecular chain N key prone to break the chain, pulverization, cracking phenomenon, it is also a polyurethane rubber weatherability than silicone rubber and the main reason for the modified polyether rubber. Green environmental protection is the demand of the economic and social development, in accordance with gb18583 tvoc of pu, sr, ms sealant for testing, test results for the pu adhesive tvoc is 80 mg/l, and the sr and tvoc were below the detection limit (ms 50mg/l) , environmental protection is superior to the pu adhesive. Besides antioxidant1010, pu glue also contains a certain amount of free isocyanate, has certain harm to the person, someone feel dizziness, headache, nausea, shortness of breath, even there are very few people to smell the smell hematemesis, immediately after serious still can immediately passed out; It can be gathered in human body, in the high concentration of gas environment for a long time can cause damage to the skin and mucosa, poisoning the central nervous system, causing visceral dysfunction and poisoning, and potentially carcinogenic effect. Keep good ventilation must be noticed when using, take the necessary protective measures. 4 curing rate, this paper tests the 24 h thickness and thickness of 15 d curing pu curing glue, sr and SMP adhesive are gradually need to absorb the moisture in the air were situated in curing reaction, the pu adhesive curing thickness of 2-24 h 3 mm, 15 d solidification thickness is 15 17mm; The sr glue solidification thickness of 2-24 h 3 mm, thickness of 20-15 d during curing 22mm; Baiyun brand one-component SMP strong reactivity, solidification thickness of 4 to 24 h 5 mm, 15 to 28 - d solidification thickness 30mm。 Baiyun brand double of SMP curing with water in the reaction system itself, both inside and outside at the same time, can be cured within 24 h. Recently, because of concerns about the Middle East conflict upgrade and reducing Iran's oil supply, brent crude oil futures prices to $80 a barrel. Naphtha price is closely related to the price of crude oil, as crude oil prices rise, naphtha prices will begin to rise. This would make it with naphtha as the raw material of petrochemical manufacturers, mainly in Europe and parts of Asia cracking operators of ethylene production costs rise, profits decline. Silicone products, just hit the light body, may influence due to the uneven mixture of solidification, suggest to 1 - in front of the materials 50 px to lose; Will note put inside the entrance has a tray of lighter materials, slow and once in place, about 3 minutes 30 seconds after curing materials are taken from the mouth; In a year-long trial, the damage degree of neoprene and mixed sponge, two kinds of materials in the process of test sample is lost or damaged. Severe dry samples due to sunlight and high temperature material corrosion, a strong wind can blow down experimental samples from test plate. Is suitable for use in children's tableware biological plastic type, mainly is the PLA ( Poly (lactic acid) Polylactic acid (PLA), is based on lactic acid as the main raw material polymerization of polymers, raw material sources and can regenerate adequately, mainly corn, cassava as raw materials, etc. A offered mould FuChang hardware accessories and other products suppliers, said FuChang after lawsuits caused by long-term supplier default funds, lead to more difficulty in terms of bank loans, in addition, FuChang was huawei fines of up to ten million in the near future, so the capital chain out of the question. Drinking reading: silica gel, pencil case, custom silicone tray, directly contact the dongguan custom silicone products manufacturer; Tel: 400 - 0769 - 878;
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