PP (polypropylene # pleated plastic | soft) / TF400 / Samsung Total purposes: film Important parameters: melt flow rate: 7 g / 10min density: 0.9 g / cm3 mold shrinkage: 1.65% notched impact strength: 3 Tensile strength: 34.3 MPa Elongation at break: 500% flexural modulus: 735 MPa Hardness: 70 Vicat softening point: 120 ℃ heat distortion temperature: 85 ℃ Manufacturer: Samsung Total Company Limited PP plastic, chemical name: Polypropylene English name: Polypropylene (referred to as PP) Gravity: 0.9-0.91 grams / cubic centimeter molding shrinkage: 1.0-2.5% molding temperature: 160-220 ℃. Heat distortion temperature of 80-100 ℃, a high flexural fatigue resistance, commonly known as "pleated plastic." PE ratio transparent, non-toxic, tasteless, can be used for utensils. Low density, good toughness, good chemical resistance. PP drawbacks: low dimensional accuracy, lack of rigidity, poor weather, easy to produce "copper harm", after a contraction phenomenon, after stripping, easy to aging, brittle, easily deformed. PP polypropylene purposes: injection molding products: used in a proportion of injection molded article PP resin may account for about half of which commodities ordinary PP as raw materials, auto parts to enhance or toughening PP as raw material, while the other uses either high impact strength and copolymer polypropylene low brittle temperature of PPC-based raw materials. Auto Parts: PP is increasingly becoming the dominant material of auto parts, has become the largest automotive plastic varieties. Toughening PP bumper and wheel housing enclosures, reinforced PP applies dashboard, steering wheel, handle, container, battery shell. Daily necessities: Normal PP used in the injection molding hangers, chairs, stools, barrels, pots, toys, stationery, office supplies, furniture, hinges, turnover box. Household appliances: modified PP bucket for washing machines, TV cabinet, Fan Ye, refrigerator liners, small appliances, such as Shell. Film products: PP films account for about 10% PP amount, which is characterized by transparency and surface gloss close cellophane, but flexibility is not good, strong hands rubbing sound; high intensity, can be used for re-packaging material; oxygen permeation rate was 30% HDPE film for plastic Co. proof packaging materials, such as advanced clothing, medicines, cigarettes and other packaging. Good heat resistance PP film can be sterilized by boiling for frozen and fresh food packaging. Good electrical insulation properties of PP film, oriented film after heat-setting process can be used for the insulating material of the capacitor, motors, transformers, and even better than PET film. Biaxially oriented PP film (BOPP) strength, transparency, gloss and so good, it can be used with typewriters, adhesive tape base film, cigarette packaging film. Fiber products: PP fiber products mainly include single wire, flat wire, fiber categories. PP monofilament density, good toughness, wear resistance, suitable for the production of ropes, nets and so on. PP Flat Yarn high tensile strength, for the production of woven sacks used to replace traditional. PP woven bags with high strength, commonly used in fertilizer, cement, grain, sugar, mineral powder, chemical raw materials packaging. PP Flat Yarn can produce woven cloth, used for tents, tarpaulin, color of the cloth. PP fibers are widely used in carpets, blankets, clothing, mosquito nets, artificial turf, artificial, diapers, cloth, non-woven fabrics and curtains. Extrusion products: Tubing: PPC mainly as raw material for the Sheung Shui, drainage, heating, chemical and corrosive media; between the pipes and fittings can be used to connect hot-melt sheet: often PP / PE blends as raw materials , mainly for stationery and plastic products, such as folders, famous clip, albums, disposable cups and so on. Moreover, PP can also be used to extrude rods, plates and other products. Hollow products: good transparency and mechanical properties of PP hollow products, mainly used for single-bottle detergents, cosmetics and pharmaceutical packaging, composite materials and composite barrier bottles for food, liquid fuels, chemicals packaging. Our long-term cash to provide the above uses the corresponding PP polypropylene products, please call us ...... polypropylene (PP) molding polypropylene good processability, molded in many ways, such as injection molding, blow molding, vacuum thermoforming, coating, spin forming, welding, machining, plating and foaming, and the metal surface coating. Wherein the ratio of large injection molding, injection temperature between 180 to 200, the injection pressure at 68.6 ~ 137.2MPa, mold temperature of 40 ~ 60 ℃. Pre-drying at a temperature of about 80 ℃. Avoid prolonged contact with the metal wall PP polypropylene secondary processing is very good, better than polyethylene printability, gravure, offset, plano-concave plates and other printing methods can be used to get a good good heat Printing performance oil, water and other requirements, subject to a corona discharge treatment re-printing. Polypropylene Molding Injection molding conditions: Injection molding machine selection: the selection of the injection molding machine has no special requirements. Since PP has high crystallinity. It requires the use of higher injection pressure and can be multi-stage control of computer injection molding machine. Clamping force general press 3800t / m2 to determine the injection volume of 20% to 85%. Drying: If you do not need drying properly stored. Melting temperature: PP melting point of 160-175 ℃, decomposition temperature 350 ℃, but setting the injection processing temperature should not exceed 275 ℃. Melting zone temperature is preferably at 240 ℃. Mold temperature: mold temperature 50-90 ℃, the size requirements of high temperature with high modulus. Core temperature lower than the cavity temperature above 5 ℃. Injection pressure: the higher injection pressure (1500-1800bar) and holding pressure (about 80% of the injection pressure). About 95% of the whole trip holding pressure, with a longer dwell time. Injection speed: In order to reduce internal stress and deformation, should choose high-speed injection, but some grades of PP and mold NA (bubbles, gas lines). As the surface engraved with patterns of light and dark stripes diffused by the gate, then use the low speed injection and high mold temperature. Runners and Gates: flow channel diameter 4-7mm, needle-shaped gate length 1-1.5mm, diameter as small as 0.7mm. Polygon gate length as short as possible, about 0.7mm, a depth of half the thickness, width of the wall thickness twice, and willing to increase gradually melt flow length of the cavity. Mold must be well vented, vent depth 0.025mm-0.038mm, thickness of 1.5mm, to avoid shrinkage marks, it is necessary to use large round nozzle and a circular flow channel, stiffener thickness is smaller ( for example, the wall thickness of 50-60%). Homo PP products manufactured, the thickness should not exceed 3mm, or there will be bubbles (thick-walled products can only be used copolymer PP). Melt back pressure: Available 5bar melt back pressure, the color powder may be appropriate to increase the back pressure. After processing products: To prevent shrinkage deformation caused after crystallization, products generally require soaked in hot water. Tips: plastic frequent price fluctuations, the page did not write specific offer, For more comprehensive details, quotes! Please use the QQ or telephone direct consultation. If you need detailed material (material, UL report, RoSH standard, SGS test reports, etc.), please contact our staff on request. Thank you for your cooperation and support!