New developped PVC extrusion profile for power socket rail
others
The characteristics of liquid crystal polymer and polyimide
by：CSSSLD
2021-02-03
Polyimide as the flame retardant polymer, PEI, PAI the oxygen index of 47 and 43, respectively, and the combustion smoke density low, small toxic gas content.
Radiation resistant performance is good, PAI after Y rays, only the tensile strength of the loss of 5%.
Polyimide at higher temperature range electric performance is very good, especially the corona resistance, superior to other engineering plastics injection molding processing.
Polyimide not alkali and acid, in boiling water and steam for a long time under the action of damage, but ultem hydrolysis stability, 10000 h in a boiling water can still retain 85% of the strength.
LCP have prominent flame retardancy, generally without adding flame retardants can achieve LL94V - Level 0 level of flame retardant, smoke is also very low, but also has excellent vibration absorption properties, used for audio parts can reduce the noise. Due to forming the molecule altitude orientation, products are anisotropic, at right angles to the flow direction of the mechanical performance is relatively poor, and there is also a difference between the products surface and central layers, the need for chemical and physical modification.
polyimide resin on the basis of different varieties, performance also varies. Excellent mechanical properties, tensile strength is generally in more than 100 mpa. Polyamide imide performance is particularly prominent, the tensile strength can reach 200 mpa, the elastic modulus of pma 5000, notched impact strength of 140 j/m, polyimide creep resistance, abrasion resistance is very good. Good heat resistance, long-term use of temperature above 200 ℃, generally all benzenoid PI can reach 260 ℃, and low temperature resistance is very outstanding, in - 269 ℃ low temperature can keep the mechanical strength.
LCP joint strength is low, the mold design should avoid seam line, or to place it in the secondary components. Should not be due to the linear expansion coefficient is low, the production of products with embedded parts. With glass fiber, carbon fiber can improve the mechanical properties and thermal stability. With carbon fiber reinforced, for example, bending elastic modulus can be doubled, reaching 30000 mpa. Filled with inorganic fillers, such as mica, graphite, etc. , to improve the joint strength, and reduce the anisotropy of products, packing and often the LCP modification with glass fiber.
LCP and most engineering plastic alloy, can reduce the cost of products, some can also improve product performance, for example, and an amorphous PES, PC, and crystalline resin, such as nylon, POM, PBT, PEEK, PCTFE, UHMWPE, etc. The application of LCP is mainly in the electronic electric, automobile, chemical industry. In the electrical industry, LCP to produce high density connector, printers, and other components.
LCP thermal stability and high heat resistance, temperature index is up to 220 - UL 240 ℃, special grade is 260 ℃. Soldering heat resistance and high and low temperature resistance is also very good. LCP in high injection molding processing temperature range, for the vast majority of solvents and chemicals has excellent chemical stability, can be resistant to acid and the concentration of 90% to 50% of the concentration of alkali. In addition, you can through the microwave radiation and resistance to high doses of atomic radiation, the ultraviolet radiation is also stable.
polyimide, referred to as 'PI, is the earliest emergence of high temperature resistant, high strength of special engineering plastics. In the heat resistance of the engineering plastics and its important position. Polyimide is in the main chain molecules containing imide group of aromatic heterocyclic polymers. Polymer variety are many, but basically can be divided into two major categories of thermosetting and thermoplastic, already industrialized production and scale of the main varieties have both benzene type polyimide, ether anhydride type polyimide, polyamide imide, polyether imide and double maleic imide. Among them are benzene type polyimide, polyamide imide and ultem are thermoplastic.
more excellent articles: poly (aryl ether ketone, click directly.
http://www。 csssld。 cn//html/2017/Info_0217/497。 HTML
nantong on suye's official website: http://www. csssld。 cn//
LCP have prominent flame retardancy, generally without adding flame retardants can achieve LL94V - Level 0 level of flame retardant, smoke is also very low, but also has excellent vibration absorption properties, used for audio parts can reduce the noise. Due to forming the molecule altitude orientation, products are anisotropic, at right angles to the flow direction of the mechanical performance is relatively poor, and there is also a difference between the products surface and central layers, the need for chemical and physical modification.
polyimide resin on the basis of different varieties, performance also varies. Excellent mechanical properties, tensile strength is generally in more than 100 mpa. Polyamide imide performance is particularly prominent, the tensile strength can reach 200 mpa, the elastic modulus of pma 5000, notched impact strength of 140 j/m, polyimide creep resistance, abrasion resistance is very good. Good heat resistance, long-term use of temperature above 200 ℃, generally all benzenoid PI can reach 260 ℃, and low temperature resistance is very outstanding, in - 269 ℃ low temperature can keep the mechanical strength.
LCP joint strength is low, the mold design should avoid seam line, or to place it in the secondary components. Should not be due to the linear expansion coefficient is low, the production of products with embedded parts. With glass fiber, carbon fiber can improve the mechanical properties and thermal stability. With carbon fiber reinforced, for example, bending elastic modulus can be doubled, reaching 30000 mpa. Filled with inorganic fillers, such as mica, graphite, etc. , to improve the joint strength, and reduce the anisotropy of products, packing and often the LCP modification with glass fiber.
LCP and most engineering plastic alloy, can reduce the cost of products, some can also improve product performance, for example, and an amorphous PES, PC, and crystalline resin, such as nylon, POM, PBT, PEEK, PCTFE, UHMWPE, etc. The application of LCP is mainly in the electronic electric, automobile, chemical industry. In the electrical industry, LCP to produce high density connector, printers, and other components.
LCP thermal stability and high heat resistance, temperature index is up to 220 - UL 240 ℃, special grade is 260 ℃. Soldering heat resistance and high and low temperature resistance is also very good. LCP in high injection molding processing temperature range, for the vast majority of solvents and chemicals has excellent chemical stability, can be resistant to acid and the concentration of 90% to 50% of the concentration of alkali. In addition, you can through the microwave radiation and resistance to high doses of atomic radiation, the ultraviolet radiation is also stable.
polyimide, referred to as 'PI, is the earliest emergence of high temperature resistant, high strength of special engineering plastics. In the heat resistance of the engineering plastics and its important position. Polyimide is in the main chain molecules containing imide group of aromatic heterocyclic polymers. Polymer variety are many, but basically can be divided into two major categories of thermosetting and thermoplastic, already industrialized production and scale of the main varieties have both benzene type polyimide, ether anhydride type polyimide, polyamide imide, polyether imide and double maleic imide. Among them are benzene type polyimide, polyamide imide and ultem are thermoplastic.
more excellent articles: poly (aryl ether ketone, click directly.
http://www。 csssld。 cn//html/2017/Info_0217/497。 HTML
nantong on suye's official website: http://www. csssld。 cn//
Custom message
Related Products
