PC features:1, high impact strength, wide range oftemperature.2. High degree of staining.3. H.D.T.4. Excellentelectrical characteristics.5, tasteless and odorless to the humanbody harmless in line with health.6. Low forming shrinkage and gooddimensional stability.Electronic appliances: CD, switch, housing,canister, telephone.Industrial parts: camera body, case, cap,diving mirror, lens.Heat resistance, shock resistance, flameretardant, good mechanical properties at ordinary operatingtemperature. Compared with the similar polyester, the polyester hasbetter impact resistance, high refractive index, good processingability and UL94 v-0 flame retardant performance without additives.However, the price of poly is relatively low, and can be producedby bulk polymerization of large devices. With the increase of theproduction scale of poly (ethyl ester), the price differencebetween poly (ethyl ester) and poly (methyl group) is decreasingday by day. Polyester has poor wear resistance. Some polyurethanedevices for wear and tear applications require special surfacetreatments.
Optical lighting: for the manufacture of large lampshades,protective glass, optical instruments around the eyepiece tube, butalso widely used in aircraft materials. Electronic appliances: polyester is a good grade E (120 ℃) insulation materials, used in themanufacture of connectors, coil framework, pipe insulation,insulation casing, telephone shell and parts, miner's lamp batteryshell, etc. It can also be used for making parts with highdimensional accuracy, such as optical disc, telephone, electroniccomputer, video recorder, telephone switch, relay and othercommunication e Polyurethane thin touch is also widelyused as capacitors, insulation bags, tapes, color video tapes andso on.Mechanical e: used for manufacturing all kinds ofgear, rack, worm gear, worm, bearing, CAM, bolt, lever, crankshaft,ratchet wheel, also can be used for some mechanical parts, coverand frame parts.E: cups, tubes, bottles, dentalinstruments, containers, surgical instruments, and even artificialorgans such as artificial lungs.Other aspects: double wall panelswith hollow reinforcement, glass for the greenhouse, etc. Used intextile industry as textile yarn tube, textile machine bearingbush, etc. Daily use for milk bottles, tableware, toys and models,etc.
PC processing technology: PC bibulous rate is bigger, plasticraw materials must be preheated before processing dry, pure PC 120℃ drying, modified PC generally with 110 ℃ drying temperature morethan 4 hours. Drying time should not exceed 10 hours. In general,air extrusion can be used to determine whether the drying issufficient. The proportion of recycled materials can reach 20%. Insome cases, recycled materials can be used, the actual amountdepends on the re of the products. The recycledmaterial can not be mixed with different color masterbatch at thesame time, otherwise it will seriously damage the property of thefinished product; Common mold temperature is 80-100 ℃, and glassfiber is 100-130 ℃, small products available needle gate, the gatedepth should be the thickest part of 70%, other gate are circularand rectangular. The larger the gate, the better, to reduce thedefect caused by excessive shearing of the plastic. The depth ofthe exhaust hole should be less than 0.03-0.06mm, the flow channelshould be as short and round as possible, and the demoulding slopeis generally about 30 '-1. The convection injection method can beused to determine the processing temperature. General PC plasticprocessing temperature is 270-320 ℃, some modification or lowmolecular weight PC plastic material is 230-270 ℃.
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