As the main assistant of polyurethane foam, color paste is widely used in all kinds of polyurethane materials. As a professional polyurethane color paste manufacturer in East China, the color paste produced by our factory has the characteristics of high color concentration, good fluidity, large amount of addition does not affect foaming, bright color, strong weather resistance, etc
Polyurethane material (i.e. polymer containing carbamate group in the main chain of macromolecule, - nhcoo) has developed rapidly since industrial production was not put on the market in 1950s. Compared with polymer rubber, it has its own characteristics. It can be used to produce polyurethane products with different properties and properties according to different needs of using performance, using different numbers of functional groups and different types of functional groups and different production processes.
Among rubber varieties, there are polyurethane rubber varieties that can be crosslinked. There are also non rubber categories, such as foam plastics, hard plastic products, coatings, high resilience synthetic fibers, artificial leather, adhesives and so on.
Polyurethane materials are widely used in various fields at present, such as in the aerospace industry, its hard products, soft products, foam products, which are lighter than metal materials, [very important for aircraft] and have the properties of high resilience and non flammability, high strength, ultra-low temperature insulation, etc., which are used for aircraft nose cover, deceleration plate, radar radome, aircraft fuel tank filler, fuel consumption Polyurethane materials are indispensable for the control of vaporizer buoys and various supports and cushions for interior decoration, thermal insulation materials and cushions for transportation, home manufacturing, and even high-end adult condoms and tires.
And the recent development and use of products in automobile shock absorption and damping accessories has attracted more attention.
Although there are many kinds of polyurethane products, the classification of polyurethane products is no more than:
Soft foam products, hard products, and elastomers [thermoplastic elastomers, vulcanized elastomers EU, AU].
The product forming equipment, such as polyurethane rubber, is generally solid. Sulfur, peroxide and polyisocyanide can be used for vulcanization. It can be designed according to the production process and formula of conventional rubber products.
In the case of thermoplastic elastomers, injection or molding can be used. If it is plastic polyurethane, it can be produced by casting process.
Taking soft polyurethane foam products as an example, the main ingredients of the formula are polyether, polyester, or other polyols, and polyisocyanates. Others include water chain growth agents, crosslinking agents, catalysts, foam stabilizers, foaming agents, flame retardants, release agents, coloring agents, etc. The production process is generally two-component liquid reaction molding. That is to say, one group is the mixture reaction of polyol polymer and isocyanate, and then the above reactants are mixed with another group including water, foaming agent, stabilizer, catalyst, and various additives to generate reactants including organic carbamate, urea group, etc. Meanwhile, carbon dioxide is generated by reaction, releasing a lot of heat, making the added foaming agent generate vaporization, and then the catalyst is used for regulation Foaming speed, and finally finished foam structure uniform products.
At present, the automobile manufacturing industry is constantly improving the safety, comfort and durability, and the durability requirements of shock absorption and damping elastomer parts under high-strength working conditions are very high. A new type of shock absorber made of polyurethane soft foam has appeared in foreign markets. Its physical and mechanical properties and shock absorption effect are slightly better than rubber shock absorption accessories. The product requires a density of 0. 08g · cm3, the material is compressed by 5%, the compression strength is above 7kpa, the product works normally under the - 20-40 "degree, the compression permanent deformation of the product is not more than 10%, at the same time, the product has oil resistance, under repeated pressure impact, there is no fracture. There is nothing special about its production process, the key is its main reaction material. At present, BASF company monopolizes the production and supply. BASF company also learns the market supply principle of DuPont company for perfluoroether rubber, that is, it only sells manufactured products, not raw materials, so as to reduce market competitors.
The new polyurethane soft foam automotive shock absorber adopts advanced "one-step" forming process. The ingredients of all ingredients, such as isocyanate, polyol polymer, chain extender, catalyst, foam stabilizer and other auxiliaries, will be measured according to the formula. The isocyanate can be used as a separate component, and polyol polymer, water and auxiliary foaming agent can be used as chain extender. Surfactant, catalyst and other auxiliaries are prepared into a component in advance, and then they are added to the reaction tank and foaming agent at one time. After high-speed mixing, the foaming reaction process is carried out. This one-step production process is particularly suitable for processing accessories with complex shapes and small specifications. With the molding method, the mixed combination liquid is directly injected into the mold with complex shape, foamed and formed in the mold cavity. Products made by this method. The specifications and sizes are accurate, and the products can be inlaid with metal parts according to the needs.
At present, polyurethane products are widely used and have a large market demand. Although China started late, it has developed rapidly. Its global market share has reached more than one quarter, and it has become the largest manufacturing and consumption market of polyurethane products in the world. There are only deficiencies, the key main reactant, compared with the advanced level of foreign countries, there is still a gap, which needs to be innovated and developed in the industry.
It is reported that the wear resistance and environmental protection of the retreaded tire with polyurethane as tread rubber are better than that of natural rubber. This innovative research and development has opened up a new way for the retreading process. During the 13th Five Year Plan period, polyurethane industry will have greater development space.
Address: Longzhen Avenue, Longshan Industrial Zone, Cixi, Ningbo
Marketing Center: 1308, Yaojiang Xindu, Hongtang street, Jiangbei, Ningbo
Tel： +860574-86501282-0
83096225 83096226
Fax： +860574-86501283
Web：http://zy-pigment.en.alibaba.com/
