Advantages and uses of LCP plastic raw materials
2020-05-05 Connector、 Connector manufacturer
LCP plastic raw material: LCP plastic raw material (liquid crystal polymer) is also called liquid crystal polymer. It is a new kind of polymer material, which is liquid crystal in the melting state.

LCP benefits
1. High liquidity
2. Good dimensional stability
3. Excellent liquidity
4. Solvent resistance
5. High mechanical strength
6. Flame retardancy

LCP purpose
1. Quick connect device, coil, switch and socket
2. Pump parts, valve parts
3. Automobile fuel peripheral parts
4. Container for electronic furnace

Material properties
This kind of material has excellent heat resistance and molding performance. The main polymerization method is melt polycondensation, and the whole aromatic LCP is supplemented by solid polycondensation to produce high molecular weight products. One step or two-step melt polymerization is often used to produce LCP plastics. In recent years, the technology of continuous melt polycondensation to produce high molecular weight LCP has been developed. Liquid crystal aromatic polyester in liquid crystal state because its macromolecular chain is oriented, it has abnormal regular fiber structure, special performance, high product strength, no less than metal and ceramics. The tensile strength and bending modulus of various thermoplastic engineering plastics developed in the past 10 years. Mechanical properties, dimensional stability, optical properties, electrical properties, chemical resistance, flame retardant, good processability, good heat resistance, low thermal expansion coefficient. With different monomers, the properties, processability and price of the liquid crystal polyester are different. Different fillers and different amount of fillers also affect its performance.

A: Liquid crystal can be divided into lyotropic liquid crystal polymer and thermotropic liquid crystal polymer. The former is liquid crystal in solvent, while the latter is liquid crystal due to temperature change. B: The main chain of liquid crystal polymer molecules is rigid, and the molecules are closely stacked, and highly oriented in the molding process, so it has small linear expansion coefficient, low molding shrinkage, very prominent strength and modulus of elasticity, and excellent heat resistance, high load deformation temperature, some of which can be as high as 340 ℃. C: LCP has good weather resistance, radiation resistance, excellent flame retardancy, and can extinguish the flame without further combustion. Its combustion level reaches UL94V-0. LCP plastic material is one of the special plastics with the best fire safety. D: The general thermotropic liquid crystal polymer has good fluidity and is easy to be processed. The molding product has the unique skin core structure of liquid crystal polymer, the resin itself has fiber properties, and has a high orientation in the melting state, so it can play the role of fiber reinforcement. This is also the most striking feature of liquid crystal polymers. E: Thermotropic liquid crystal polymer can also be made into polymer blends with a variety of plastics, in which the liquid crystal polymer plays the role of glass fiber reinforcement, which can greatly improve the strength, rigidity and heat resistance of the materials. F: The density of LCP plastic raw material is 1.4-1.7g/cm3. Liquid crystal polymer has the mechanical properties of high strength and high modulus. Because of its structural characteristics, it has self reinforcement, so the unreinforced liquid crystal plastic can reach or even exceed the level of mechanical strength and modulus of ordinary engineering plastics after reinforced with dozens of percent of glass fiber; if reinforced with glass fiber, carbon fiber, etc., it is far more than other engineering plastics. G: LCP liquid crystal polymer also has excellent thermal stability, heat resistance and chemical resistance. For the creep defects of most plastics, the liquid crystal material can be ignored, and has excellent wear resistance and antifriction. H: LCP plastic material has excellent electrical insulation performance. Its dielectric strength is higher than that of general engineering plastics, and its arc resistance is good. As a part of electrical appliance application, its electrical performance is not affected when the continuous use temperature is 200 ~ 300 ℃. However, the intermittent use temperature can reach about 316 ℃. 1: LCP plastic raw materials have outstanding corrosion resistance. LCP products will not be eroded in the presence of 90% acid and 50% alkali. For industrial solvents, fuel oil, detergent and hot water, they will not be dissolved or cause stress cracking after contact.

Nature
Property 1: LCP appearance: Beige (also has opaque solid powder in white); 2: LCP density: 1.35-1.45g/cm3; 3. LCP has self reinforcement: it has abnormal and regular fibrous structure, so the unreinforced liquid crystal plastic can reach or even exceed the mechanical strength and modulus level of ordinary engineering plastics after reinforced with dozens of glass fibers. If glass fiber and carbon fiber are used for reinforcement, they are far more than other engineering plastics. 4. Liquid crystal polymer also has excellent thermal stability, heat resistance and chemical resistance. For the creep characteristics of most plastics, liquid crystal materials can be ignored, and its wear resistance and wear reduction are excellent. 5. LCP has good weather resistance, radiation resistance, excellent flame retardancy, and can extinguish the flame without further combustion. Its combustion level reaches UL94V-0. 6. LCP has excellent electrical insulation performance. Its dielectric strength is higher than that of general engineering plastics, and its arc resistance is good. In the continuous use temperature of 200-300 ℃, its electrical performance is not affected. The intermittent use temperature can reach about 316 ℃. 7. LCP has outstanding corrosion resistance. LCP products will not be eroded in the presence of 90% acid and 50% alkali. For industrial solvents, fuel oil, detergents and hot water, they will not be dissolved or cause stress cracking after contact. 8: The heat resistance classification of liquid crystal resin (low, medium and high heat resistance type) a, low heat resistance < 177 Japanese Baoli a430, rodrun & reg; lc3000 B, medium heat resistance 177 ~ 243 American DuPont 6330, Japanese Baoli a130, Mitsubishi e335g30, Sumitomo e7000, rodrun & reg; lc5000, Ueno LCP & reg; 1000 C, high heat resistance > 243 xydar & reg; - 930, DuPont; 6130 Japanese Baoli C130, Ueno LCP & reg; 2000, Titan LCP & reg; lg431, Mitsubishi e345g30, Japan II, application a, electronic and electrical are the main markets of LCP: the surface assembly and welding technology of electronic and electrical has high requirements on the dimensional stability and heat resistance of materials (can withstand the gas phase welding and infrared welding used in surface assembly Technology); b. LCP: printed circuit board, artificial satellite electronic components, jet engine parts, automobile mechanical parts, medical aspects; C. LCP added high filler or alloy (PSF / PBT / PA): as an integrated circuit packaging material, instead of epoxy resin as the coil framework packaging material; as optical fiber cable joint sheath and high-strength components; instead of ceramics as the filler material in the chemical separation tower. Instead of glass fiber reinforced polysulfone and other plastics (outer panel of spacecraft, brake system of automobile).

a. LCP has self reinforcement: it has abnormal and regular fiber structure, so the unreinforced liquid crystal plastic can reach or even exceed the mechanical strength and modulus of ordinary engineering plastics reinforced by dozens of percent glass fiber. If glass fiber, carbon fiber and other reinforced, far more than other engineering plastics.
b. Liquid crystal polymer also has excellent thermal stability, heat resistance and chemical resistance. For the creep characteristics of most plastics, liquid crystal materials can be ignored, and its wear resistance and wear reduction are excellent.
c. LCP has good weather resistance, radiation resistance, excellent flame retardancy, and can extinguish the flame without further combustion. Its combustion level reaches UL94V-0.
d. LCP has excellent electrical insulation performance. Its dielectric strength is higher than that of general engineering plastics, and its arc resistance is good. In the continuous use temperature of 200-300 ℃, its electrical performance is not affected. The intermittent use temperature can reach about 316 ℃.
e. LCP has outstanding corrosion resistance. LCP products will not be eroded in the presence of 90% acid and 50% alkali. For industrial solvents, fuel oil, detergents and hot water, they will not be dissolved or cause stress cracking after contact.

2. Application
a. Electronic and electrical is the main market of LCP: the surface assembly and welding technology of electronic and electrical has high requirements on the dimensional stability and heat resistance of materials (can withstand the gas phase welding and infrared welding used in surface assembly technology);
b. LCP: printed circuit board, artificial satellite electronic parts, jet engine parts, automobile mechanical parts, medical aspects.
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