Micro suspension PVC

   Some domestic production units and product brands of vinyl chloride with suspension method and Communist units 0-72 some domestic production units and product brands and phase of micro suspension polyvinyl chloride are mainly used for foaming, coating, dipping and plastic lining puc-sp-1 PVC in Wuhan Gedian chemical plant Sp-j pvosp- Co., Ltd. Wuxi green Aipu chemical wallpapers, artificial leather, impregnated coating of flame-retardant conveyor belt, color general-purpose, non foaming artificial leather bottom layer, artificial leather and Dishan psh-10 surface layer, canvas, soaking molding (gloves, boots and shoes), spinning (doll toys), bottle cap pad are suitable for plasticizing paste with high plasticizer content, artificial leather hair layer, bottle cap pad, eraser steel plate coating, foaming wallpapers, floor foaming layer, canvas Shenyang Chemical Industry Co., Ltd. pipes, rotary molding (toy) hoses, belts, canvas, plaited tablecloth, artificial leather foam layer foaming wallpaper, rotary molding toys, bottle caps with high plasticizer content foam, foam artificial leather psl- 10 general purpose type, which can be processed by low-temperature melting. It is used for PSH low-temperature explosion foaming body, foaming wallpaper, floor foaming layer, rotational molding bulk cyanoethylene field (MPVC) and the three PVC tree streets introduced above (suspension method, lotion method  and micro suspension method polyvinyl chloride) can also be called PVC. There is no national standard for bulk argon polymerization. Table 2-73 lists the models and performance parameter indexes of iron polyoxyethylene braid of Yibin tianyuanji Reference Group Co., Ltd., and the available time

    (2) Precautions in use: the amount of vinyl chloride monomer (VCM) in the bulk polyvinyl chloride resin is 1, which is toxic. However, because the resin powder is very fine, the powder is flying during application, storage and packaging, and it is easy to be sucked into the lungs. Therefore, dust prevention measures should be taken during operation, and workers should wear dust masks. 2.3.5 high molecular weight polyvinyl chloride high molecular weight polyvinyl chloride (HPVC) resin currently has no unified national standard. Table 2-75 shows the technical indexes of p-2500 high polymerization degree PVC produced by Beijing No.2 Chemical Industry Co., Ltd. for reference in selection and application. Table 2-75 technical indicators of p-2500 high polymerization degree PVC of Beijing No.2 Chemical Industry Co., Ltd

Index name ① conductivity of 10% resin water extract 2.3.5.1 performance characteristics high molecular weight polyvinyl chloride is a white powder resin, and the degree of polymerization is generally in the range of 2000~3000. Compared with suspension polyvinyl chloride (the degree of polymerization is in the range of 500~1500), its products have higher mechanical properties such as stretching, bending, impact, and excellent fatigue resistance, wear resistance, cold resistance and heat resistance, In application, the temperature range is also wide, and the resin has good performance of absorbing plasticizers. The products made of adding a large proportion of plasticizers have rubber elasticity. But the processability is slightly worse than that of suspension PVC- 91 (2) precautions in application the content of VCM in jujiab sales photo of bulk method is 10 poisons. However, due to this fat powder, the powder is flying and easy to be inhaled into the lungs during use, storage and packaging. Therefore, dust injury measures should be taken during operation, and workers should wear dust masks.

2.3.5 molecular weight PVC

    At present, there is no unified national standard for high molecular weight polyvinyl chloride (HPVC) trees. Table 2-75 shows the technical indexes of p-2500 high polymerization degree PVC produced by Beijing No.2 Chemical Industry Co., Ltd. for reference in selection and application. Table 2-75 name of technical indicators of p-2500 high polymerization degree polyethylene oxide plant of Jinghua No.2 Co., Ltd ① Conductivity of 10% resin water extract.

High molecular weight PVC is a kind of white powder resin, and the polymerization degree is generally in the range of 2000~3000. Compared with suspension PVC (the polymerization degree is in the range of 500~1500), its products have higher mechanical properties such as tensile, bending and impact, as well as different properties such as fatigue resistance, wear resistance, cold resistance and heat resistance, and have a wide temperature range in application; The resin has good absorption plasticizer performance. The products made by adding a large proportion of plasticizer have rubber elasticity, but the processing performance is slightly worse than that of suspension PVC. Plastic molding technician is good at it

2.3.5.2 forming method and Application

    High molecular weight PVC resin is generally only used for plasticizing processing, and products can be molded by extrusion, \plastic, calendering, blow molding and other methods. It is widely used to make soft products used in special occasions such as heat resistance, wear resistance and fatigue resistance. Such as wires and cables for high temperature (105 ℃), all plastic flame-retardant conveyor belts, water hoses, hoses, sealing washers, electrical shields, floor tiles, radiation-resistant sealing materials, thermal insulation gloves, high-strength films, high-grade soles, automotive lining accessories and artificial leather, etc. Cross linked polyvinyl chloride (clpvc) can also be generally called polyvinyl chloride or thermosetting polyvinyl chloride. Crosslinked PVC can be prepared by radiation crosslinking and chemical crosslinking. Here we only introduce the production method of radiation crosslinked wire and cable with PVC resin as the main raw material.(1) According to the formula requirements, a certain proportion of multifunctional monomers (such as glyceryl trimethylacrylate, glyceryl triacrylate, etc.) and other additives are added to PVC (suspension PVC) resin by radiation crosslinking method, but initiators should not be added. After accurate measurement, they are mixed together, and then stirred and mixed evenly; The raw materials are plasticized by an extruder, extruded from the mold, and processed into molded products (wires, cables, tubes, or other profiles), which are protected under vacuum or nitrogen conditions. After irradiation with electron rays, r-rays, etc., they form a cross-linked structure. (2) Production process radiation crosslinked PVC production process sequence is:Polyvinyl chloride electronic ray multifunctional monomer - metering → mixing evenly processed products > other additives for radiation crosslinked PVC products table 2-76 lists the performance parameters in the enterprise standard q/xgy025-92 of polyvinyl chloride for zjfl-105 radiation crosslinked wire and cable of China Blue Chenguang Research Institute of chemical industry. Table 2-77 is the enterprise standard of 80 ℃ radiation crosslinked PVC insulation material of Shanghai Cable Research Institute, which can be used for reference.

   After the radiation crosslinked polyoxyethylene decorative resin is mixed with other additives according to the formula requirements, the -92- can be used to shape the products by the processing method of float polyoxyethylene, such as the production of radiation feather crosslinked spring vinyl chloride wire and cable by extrusion molding with an extruder. Index table 2-76jfl 105 polyethylene enterprise standard for radiation crosslinked wires and cables other index 40 maximum change of breaking sec length car Shanghai Cable Research Institute Grade 80 radiation polyethylene insulation enterprise standard index 16.0, tensile strength after heat aging (120 ℃ index, China's development period, important growth rate /% de compounded humidity / ℃ 8 change parts (120 ℃) /% non occupational electrogram rate, radiation crosslinked polyvinyl chloride wires and cables, electric comparison with wires and cables made of ordinary polyvinyl chloride resin, It is a kind of wire and electric appliance with high strength, heat resistance (up to 105 ℃) and wear resistance Radiation crosslinked PVC wires and cables can be used in the internal connecting lines of dryers, bread ovens, hair curlers, water bottles, rice cookers, transformer outgoing lines, motor outgoing lines, lighting equipment wiring, internal wiring of air conditioners, high-voltage outgoing lines of color televisions, internal wiring of small exquisite appliances such as miniature tape recorders, cameras and cameras, etc.

Because this cross-linked PVC wire and cable has good mechanical properties, wear resistance and chemical solvent resistance, it is also widely used in automotive, aviation, aerospace, weapons, ships and other fields. 11.7 PVC spherical resin

PVC spherical resin is a new kind of special PVC resin. PVC spherical resin is a kind of white spherical particles with smooth surface and internal pores. See table 2-79 for the performance indicators of PVC spherical resin at home and abroad.

Compared with suspension PVC resin, PVC spherical resin has good processing performance. Therefore, PVC spherical resin can be processed by extrusion, injection molding and calendering. When used for extrusion molding products, its production extrusion rate can be increased by 15%~25%, and the spherical resin is more suitable for extrusion molding large-diameter hard pipes.