POMRTP882TFE10美国RTP系列

东莞市明一塑胶原料有限公司为您提供pomrtp882tfe10美国rtp系列。

pom丨rtp 882tfe10丨美国rtp系列pa66 rs66k15lt、lcp e462i、pp st611m 、pc 121r-111、asa 776se、eva ue633、tpu ecod12t55d、eva ef526、pps r-7、

pbt wbl36l、pa66 rd434 k17002-2mapmma sx-304、tpu 690au、pp -950、pc/abs mb1700、tpu 16n80、pc/abs fr3010hf、pbt 5010gn1-30am2、pbt b1800、

pp k7726hpa6 73m30、pbt sk641fr、pa6 t-422-01a

pbt but also produce hdpe by adding comonomers, also known as linear low density polyethylene. in recent years, various low pressure processes he developed rapidly. medium pressure only philip company is still in use, the production is mainly high density polyethylene. the method of polymerization of ethylene into low density polyethylene by using oxygen or peroxide as a initiator in high pressure method. ethylene through two stage compressed into the reactor (figure 3), under the pressure of 100 ~ 300mpa, the temperature of 200~300 deg c and under the action of the initiator for the polymerization of polyethylene, the reaction by decompression separation, the unreacted ethylene recovery after recycled polyethylene melt like in adding plastic additives after extrusion granulation. (see pictures) used in polymerization reactor has a tubular reactor (length of 2000m) and reactor two. the single pass conversion rate of tube method is 20% ~ 34%, and the single line annual production capacity is 100kt. the one way conversion rate of the reactor was 20% to 25%, and the single line annual production capacity was 180kt. the low pressure method is divided into three kinds of slurry method, solution method and gas phase method. in addition to the solution method, the polymerization pressure is below 2mpa. the general steps include the preparation of the catalyst, the polymerization of ethylene, the separation of the polymer and the granulation. 1. the polythene produced by the slurry method is insoluble in the solvent and is in the form of slurry. the slurry polymerization conditions are mild and easy to operate. alkyl aluminum is used as activator, hydrogen is used as molecular weight regulator, and most of the reactor is used. the polymer slurry produced by the polymerization kettle passes through the flash kettle, the gas-liquid separator to the powder dryer, and then the granulation (figure 4). in the process of production, the process of solvent recovery and solvent refining are also included. the products with different molecular weight distribution can be obtained by the combination of different polymerizer in series or in parallel. 2. the solution was polymerized in the solvent, but ethylene and polyethylene were dissolved in the solvent, and the reaction system was homogeneous solution. the reaction temperature (140 deg c), high pressure (4 ~ 5mpa). characterized by short polymerization time and high production intensity, it can produce three kinds of polyethylene with high density, medium and low density, which can control the properties of products better. however, the molecular weight of polymer obtained by solution method is low, and its molecular weight distribution is narrow and solid content is low. (3) the gas-phase polymerization of ethylene in the gaseous state is generally used as a fluidized bed reactor. the catalyst has two kinds of chromium and titanium, which are added into the bed by the storage tank. the high speed ethylene cycle is used to maintain the fluidization of the bed and eliminate the polymerization heat. the generated polyethylene is discharged from the bottom of the reactor (figure 5). the pressure of the reactor is about 2mpa, and the temperature is 85~100. gas phase method is the main way to produce linear low density polyethylene. gas phase method ses solvent recovery and polymer drying process, and ses 15% of investment and 10% of operation cost than solution method. 30% of the investment for the traditional high pressure method, the 1/6 of the operation fee. therefore, it has been developed rapidly. however, the gas phase method should be further improved in product quality and variety. medium pressure is used as a chromium catalyst supported on silica gel. in the loop reactor, ethylene is polymerized under medium pressure to produce high density polyethylene (hdpe). the processing and application of ailable blow molding, extrusion, injection molding method, widely used in the manufacture of thin film, hollow fiber and other products, daily-use sundry goods. in actual production, in order to improve the stability of ultriolet and oxidation of polyethylene and improve the processing and use performance, a small amount of plastic additives should be added. the usual ultriolet absorbent is two benzophenone or its alkoxy derivatives, and carbon black is an excellent uv shielding agent. in addition, antioxidants, lubricants, colorants and so on, so that the application of polyethylene to expand the scope of [1].

 

 pom丨rtp 882tfe10丨美国rtp系列pmma v045-68177 、pc 3414r-731、pa6 gf1013b、pp ah561 、pp 35ll247、pa66 dmx61g15h、pp bi518、pbt fgs600f40、pom k700bk、

tpe tc7csz、pa6 xp36-c1 pp ep341、pp 1100p、tpu 3095a、pc/abs fr3310tv、pbt gp1000ds、pc 8210-31、pp jh-570、pc b-8130r、

tpe vx-5085uipom kp004xxp、pa66 kdg1030f、tpu d91f88

2. self moistening, good friction resistance. nylon has a good self - moistening, small friction coefficient, so it has a long service life as a transmission component.

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