According to the above classification method, the resin can be divided into the following categories. 1. (Including AS), (also known as K resin), MS, MBS, transparent, transparent, transparent, transparent, transparent, transparent, , PES, J. D series, CR-39, TPX, HEMA, F4, F3, EFP, PVF, PVDF, EP, PF, UP, cellulose acetate, nitrocellulose and EVA. Where PES is polyethersulfone, J. D series of optical resins are PES copolymer derivatives, SAN is styrene / acrylonitrile copolymer, TPX is polymethyl-1-pentene, BS is 25% butadiene / 75% styrene copolymer, CR-39 Is a diallyl diethylene glycol carbonate polymer, and HEMA is a polyethyl acrylate. Among these transparent plastics, PC, PMMA, PS, PET, PETG, AS, BS, MS, MBS, transparent ABS, transparent PP and transparent PA are the most commonly used. 2. Translucent resin mainly includes PP, PE, PA, PVB (polyvinyl butyral) and so on. 3. Opaque resin absolutely opaque plastic varieties rarely, mainly PPO, POM and so on. The properties of commonly used transparent resins are shown in Table 9-9. Third, the specific choice of transparent plastic 1. Daily transparent materials daily transparent plastic requirements of the material is better transparency, low prices, easy to shape processing. (1) transparent film packaging with PE, PP, PS, PVC and PET, and so on. Agricultural PE, EVA, PVC and PET, and so on. (2) transparent film, board with PP, PVC, PET, PMMA and PC. (3) transparent pipe with PVC, PA and so on. (4) transparent bottles with PVC, PET, PP, PS and PC, and so on. 2. Lighting equipment materials lighting equipment mainly includes all kinds of lampshade products for light transmission. Specific performance, seeking for the high rate of approval, good impact resistance. Commonly used lighting equipment for the PS, modified PS, AS, PMMA and PC. 3. Optical instrument materials Optical instruments mainly refers to all kinds of mirror material, which includes glasses, lenses, magnifying glass and telescope, etc., can be divided into hard mirror and soft mirror body (contact lenses) two categories.
Traditional optical instruments are made of glass materials, but the plastic has a comparable transparency with the glass, but also has the advantages of light, easy to break, etc., is gradually replacing the glass material. (L) hard mirror body hard mirror body: to find the specific performance of transparent plastic: high transmittance, should be more than 90%, low haze; low birefringence to prevent image distortion.
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