Pcpet film production line

日期:2021/5/25 8:36:04 / 閱讀: / 來源:本站

Pcpet film production line
Modification and application of Polyoxymethylene
Polyoxymethylene (POM) is a kind of opalescent transparent crystalline linear polymer, which has good comprehensive properties and colorability. There are two methods to prepare POM: homopolymerization and copolymerization. The products obtained are also called homopolymerization and copolymerization respectively.
As a result, many international multinational companies have invested in building factories in China. DuPont of the United States and Mitsubishi Gas Chemical Company of Japan all plan to build ten thousand ton production units. Baoli plastics of Japan and lion of Japan have jointly invested 128 million US dollars. The construction of 60 kt unit in Nantong of Jiangsu Province has been approved by the relevant state departments. In addition, Hunan Xiangxian Industrial Co., Ltd., Inner Mongolia Yihua Chemical Co., Ltd., Zhejiang Juhua Co., Ltd., Sinopec Sichuan Weini lunguang and other companies are all building 10-0 fo production units in Jigu sea. At present, POM production technology is still owned by large foreign companies. Foreign investors only invest in China and do not easily transfer technology or build joint ventures. Therefore, domestic enterprises should develop their own POM production technology, digest and absorb the imported devices, and build the domestic ten thousand ton POM production device as soon as possible, so as to meet the increasing demand of the domestic market. Pcpet film production line www.www.dressup9x.com
Although Homo POM and co POM have different properties, they are basically similar. Because of its good thermal stability, wide processing temperature range and good acid-base stability, the mechanical properties of POM are slightly inferior to those of POM, but general plastic processing plants and users are willing to use POM. POM has higher mechanical strength, and its hardness and rigidity are better in engineering plastics; It has long fatigue life and excellent creep resistance in various environments; It has low friction coefficient and excellent wear resistance, low water absorption of POM and high dimensional stability of products, so the development of POM plastics has broad prospects. Pcpet film production line www.www.dressup9x.com
Although POM has many excellent physical and mechanical properties, there are still some shortcomings, which need to be modified to meet the higher requirements of engineering. In recent years, many researches have been done on the modification of POM, such as glass fiber reinforcement to improve the mechanical strength; Using PTFE powder, graphite, molybdenum disulfide, carbon fiber, PTFE fiber, engine oil, stearate and so on to improve the wear resistance of materials and reduce the friction coefficient, certain achievements have been made and put into industrial production. Pcpet film production line www.www.dressup9x.com
POM reinforced by glass fiber reinforced POM is produced by twin-screw extruder, adding a certain proportion of glass fiber into POM resin and extruding granulation. The tensile strength, bending strength, modulus and thermal deformation temperature of glass fiber reinforced POM are higher than those of POM, and it has 272 mcete, such as low Australian stock, good quality of products, etc Glass fiber content gb2576-89 10 ~ - 20% density GB 1033-86 R / em '1.46 ~ 1.50 tensile yield strength GB 1040-79 MPa 360 bending modulus of elasticity GB 9341-88 MPa 4000 crack free impact strength GB 1043-79 kJ / M > 30 simply supported beam notch impact strength Degree GB 1043-79 kJ / MI s ball indentation hardness GB 3398-82 MPa > 145 hot deformation temperature GB 1634-79 C > 155
Usage: 0 before molding, it needs to be dried, and the drying conditions are as follows; The temperature of the blast oven is 80 ~ G0 ℃, the drying time is more than 4h, and the original degree of the material layer is less than 30mm; 170 ~ 200, mold temperature; 60 ~ 80 ℃, injection pressure: 90 ~ 130 MPa
In order to make the material have more comprehensive physical and mechanical properties, two or more modifiers can be added at the same time. For example, the properties of 20% PTFE powder and 20% glass fiber filled POM are listed in table 6-2, which not only improves the friction and wear properties of the material, but also improves the mechanical strength of the material. Pcpet film production line www.www.dressup9x.com


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