PC945APC945A#247;

品牌：进口 产品规格：25KG 产地：广东东莞 包装说明： CAS/标准: 运输说明： PC 945A PC 945A÷▲‘PBT WBL36L
▲‘ABS EKF50
▲‘PC 940 NC
▲‘POM HC450
▲‘ABS VH-0815
▲‘PBT ENH2900
▲‘PBT SK655FR
▲‘PC AC3900
▲‘PC DCL329XZ
▲‘PA6 6 30V Z3/3/05
PP S2035
▲‘TPE GLS 341-007
▲‘PBT 2302G1/20



POM A kind of synthetic resin, also known as poly formaldehyde resin, POM plastic, steel material; is a kind of white or black plastic particles, has the characteristics of high hardness, high rigidity and high wear resistance. It is mainly used for gear, bearing, auto parts, machine tool, instrument inside, toy and so on.
1.1 brief introduction
2.2 performance characteristics
1.3 application fields
2.4 performance
1.5 process characteristics
2.6 application
brief introduction

A kind of synthetic resin, also known as poly formaldehyde resin, POM plastic, steel material; is a kind of white or black plastic particles, has the characteristics of high hardness, high rigidity and high wear resistance. It is mainly used for gear, bearing, auto parts, machine tools, instrument and inner parts, and so on.
Characteristic

(1) POM before processing can not be dry, the best in the process of preheating (about 80 degrees C), the stability of the product size is good.
(2) the processing temperature of POM is very narrow (0~215 DEG C), the barrel will stay for a long time or decomposition temperature more than 220 DEG C, produce formaldehyde gas with strong stimulation.
(3) the pressure protection pressure of POM injection molding is larger (similar to the injection pressure) to reduce the pressure drop. The screw speed can not be too high and the residual amount is less.
(4) POM product shrinkage rate is large, easy to produce shrinkage or deformation of.POM high specific heat, mold temperature high (80~100 degrees C), product die very hot, to prevent scald fingers.
(5) POM should be formed under the condition of "medium pressure, medium speed, low temperature and high mold temperature", and the control mould temperature should be used when the precision products are formed.
(6) high mechanical strength and rigidity
(7) maximum fatigue strength
(8) environmental resistance and good organic solvent resistance
(9) strong resistance, good electrical properties, good resilience, good lubricity, good wear resistance and good size stability.
Modified POM


PPA PPA resin is more solid and harder than fatty polyamide, such as nylon 6, 6 and so on. It has lower sensitivity to water, better thermal performance, and better creep, fatigue and chemical resistance. For example, the PPA resin containing 45% glass short fibers has a tensile strength of about 276MPa, the flexural modulus more than 13786MPa, and the thermal deformation temperature (HDT) of 549 degree F. The tensile strength can reach 117MPa even if the mineral filler level is PPA. The extensibility of PPA resin is not as good as that of nylon 6 and 6. However, an unreinforced impact grade PPA resin has been developed, and its notched cantilever impact strength is as high as 20 feet / pound / inch.
All polyphenols absorb a certain amount of water, causing plasticization and size change. For example, nylon 6, 6, at 23 degrees F, the relative humidity is 100%, it can absorb 8.9% of the moisture, which makes its glass transition temperature from 6.5 C to a 20 degree temperature, the size increased 2.3%. Under the same conditions, the PPA resin can absorb about 6% of the moisture, but the vitrification temperature of Tg will not be less than 40, and the accompanying size increases not more than 1%.
As mentioned before, glass reinforced PPA resin has a high HDT value, which can tolerate short term effects of high temperature, for example, in a furnace, or in steam phase and in the process of infrared countercurrent consolidation. The thermal oxidation stability of PPA resin makes it capable of long-term high temperature effect and glass enhancement PPA. Within 20000 hours, its continuous use temperature can reach 330 F.
Under normal conditions, PPA resins usually exhibit excellent anti solubility for fatty hydrocarbons, aromatic hydrocarbons, chlorinated hydrocarbons, esters, ketones, alcohols and most aqueous solutions. This kind of resin can not withstand the effect of extremely strong acid and strong oxidizing agent. It is soluble in phenol and cresol. PPA is not naturally flame-retardant. According to the UL94 standard, the flame retardant grade resin is graded to VO until 0.031 inches thick.
Although other melting processes can be used, the vast majority of PPA resins are processed by traditional injection molding. Pre drying PPA raw material to a humidity level below 0.1% and then loading it into a thermally sealed metal village bag or box. These containers ensure that PPA raw materials need not be dried before processing. The moisture level acceptable to the processing process is 0.15% or lower. The processing of wet resin can reduce the molecular weight and cause the loss of mechanical properties. Using a desiccant bucket dryer, it is easy to dry the resin to the dew point humidity of 25 F or even lower at 175 F. The drying time depends on the amount of water absorbed, usually within the range of 4 - 16 hours.


PPO performance
1. It's white particles. It has good comprehensive performance and can be used in 120 degrees of steam. It has good electrical insulation and small water absorption, but it has the tendency of stress cracking. The modified polyphenylene ether can eliminate stress cracking.
2. It has outstanding electrical insulation and water resistance. It has good wear resistance and electrical properties, and has good dimensional stability. Its dielectric property ranks first in plastic.
3, MPPO is a modified material made by blending PPO with HIPS. At present, the materials on the market are all such materials.
4, high heat resistance, glass transition temperature 211 degrees, melting point 268 degrees, heating to 330 degrees, and decomposition tendency. The higher the content of PPO, the better the heat resistance and the hot deformation temperature can reach 190 degrees.
5, the flame retardancy is good, it has self interest, and it has medium combustibility after mixing with HIPS. It is light and non-toxic and can be used in the food and drug industry. Poor light resistance, long time in the sun will be discoloration.
6. It can be modified by blending with ABS, HDPE, PPS, PA, HIPS, glass fiber and so on. PPO plastic raw material characteristics: A and PPO plastic materials are non-toxic, transparent and relatively small in density. They have excellent mechanical strength, stress relaxation, creep resistance, heat resistance, water resistance, water vapor resistance and dimensional stability.
Molding process PPS is a thermoplastic engineering plastic containing benzyl sulfide on the main chain of the molecule, which is a polyether.
PPS plastic material English Name: Phenylenesulfide specific gravity: 1.36 g / cubic centimeter molding shrinkage: 0.7%
Molding temperature: 300-330 centigrade. It is a kind of special thermoplastic engineering plastic with excellent comprehensive performance. Its outstanding characteristics are high temperature resistance, corrosion resistance and superior mechanical properties.