work when the noise and to be as small as possible; hygroscopicity, permeability and oxygen permeability are small; mechanical properties of long-term stability; easy processing. Applicable to the disc material is PC, lPMMA, new amorphous thermoplastic polyester ETG), amorphous ring olefin (mCOC), modified bisphenol A epoxy resin. Which is the most commonly used PC, in recent years due to mCOC low water absorption and excellent optical properties, the application gradually expanded. 8. Transparent packaging materials transparent packaging materials} mainly used for photoelectric conversion electronics such as solar cells, the use of transparent plastic performance requirements: high transmittance; good wear resistance, high pollution resistance, such as adsorption of low dust ; Good weather resistance; excellent sealing performance, refers to air tightness, moisture resistance and prevent the performance of other chemicals invasion; soft and flexible. Suitable for transparent packaging materials are mainly surface hardened PMMA, FEP, EVA, EMA (ethylene / vinyl acetate copolymer), PVB (polyvinyl butyral), etc., generally do not PET, PC, PVC, PU and so on. Here are two examples of EVA and EMA weather resistant packaging formula. ①EVA package formula (mass) ② EMA packaging formula (mass copies.

A injection molding machine conditions 1. The temperature of the pipe set 260 ℃ ~ 290 ℃, PET bottle embryo thickness tolerance within 0.10mm, oil, water bottle within 0.25mm. 2. Storage speed should be fast. 3. Injection speed above the speed. 4. Pressure to moderate pressure. 5. Each mold injection of the remaining material to 5mm-10mm, the less the better. 6. The injection capacity is required to be injected below 80% of the injection volume. 7. Finished with a polarizer to check the average distribution of pressure lines, and appropriate adjustment of molding information. 8. Moderate back pressure adjustment can increase the color mixing evenly and bubble discharge. B preform molding process conditions require PET preforms in addition to available extrusion molding process, most of the production of preforms with injection molding. In the whole preform manufacturing equipment, in addition to injection molding machine, but also including hot runner mold, ester dehumidification dryer, mold cooling ice machine, preform removal of the robot arm, embryo conveyor belt and injection environment control air conditioning dehumidifier , And the various machines are to be associated with the launch machine action