Essay Example on The classification of thermoplastic Plastic









The classification of thermoplastic plastic by function and use can be classified into 3 categories 1 general plastic PE PVC PS PMMA 2 general engineering plastics PA PC POM PET PBT PPO MPPO 3 and special engineering plastics PTFE PPS PI Polysulfone polyketone Plastic is made from two parts resin and additives The field of plastic applications 1 packing materials are the largest use of plastic accounting for more than 20 of the total amount and the main products are as follows 1 The film products such as heavy packaging film barrier film heat shrinkable film self adhesive film anti rust film tear film and air cushion Membrane etc 2 Bottle products such as food packaging bottles oil beer soda liquor vinegar soy sauce and milk etc cosmetic bottles medicine bottles and chemical reagent bottles etc 3 Boxes of products such as food boxes lunch boxes cake boxes gift boxes and ice cream boxes etc and hardware handicrafts Stationery and other boxes 4 Cup products such as a disposable beverage cup milk cup and yogurt cup 5 Boxes of products such as beer boxes soda boxes food containers working containers ammunition boxes fruit boxes vegetable boxes and And so on 6 Bags such as handbags and woven bags etc 2 daily necessities mainly include the following items 1 The products such as POTS buckets boxes baskets plates chairs ships leather cases thermos bottles silk and nets etc 2 Stationery such as a pen ruler clip knife table tennis badminton and racket etc 3 

Clothing products such as sole artificial leather synthetic leather buttons hairpins zippers hats raincoats skin With necklaces and so on 4 Kitchen supplies such as POTS bowls pans buckets forks spoons chopping boards lighters and firearms 3 agricultural materials such as film canopy film seedling plate irrigation pipe drip irrigation pipe sprayer and fishing net etc 4 there are several main building materials The 1 pipe material such as pipe pipe pipe tube and heating pipe 2 The material such as a door window furniture armrest decorative line and warm air cover etc 3 The plate such as decorative board ceiling floor exterior wall decorative aluminum plastic composite board sun board partition board and roof partition Hot plate etc 4 Other such as carpet floor leather wallpaper artificial marble artificial agate whole bathroom and waterproof material etc 5 insulation materials such as high medium and low voltage insulated cables and sheath cables capacitor media film junction box switch Relays and air switches etc 6 mechanical products such as various kinds of housing pump material pull rod rope chain sprocket gear CAM shaft Bearing guide rail seals and gaskets etc 7 auto parts such as instrument panel bumper wheel housing cover steering wheel seat fuel tank pipeline radiator grill Grid ashtray ceiling armrest frame lampshade and friction film etc 8 medical materials such as artificial bone trachea blood vessels skin teeth kidneys and heart valves The medical device such as a disposable syringe surgical instrument blood transfusion tube endoscope tube and catheter etc 9 optical materials mainly include optical lens materials optical fiber materials and optical disc materials 

The single screw extruder is usually matched with the extruder head and then it is equipped with the cooling fining device traction device a cutting device etc Set up the extrusion unit and set up the molding pipe film sheet profile wire net rod cable covering etc The continuous production line of the product The function of a single screw extruder is to transport plasticize homogenize and build the plastic The process of cutting and heating of plastic in the extruder cylinder to flow state and good plasticity One of the important functions of a single screw extruder is to transfer the plastic material steadily to the extruder Machine goes through by the solid particles or powder to the transition of the solution in order to adapt to the change of state of the plastic extruder design has a solid conveying section melt and melt conveying section of the three functions among them the culture delivery period is known as the metering section different functions The material transport mechanism is different Single screw extruder can be applied to the processing of PP PE PS ABS PMMA PVC and other thermoplastic pipes sheet sheet bar profile and plastic granulator In polymer processing twin screw extruder is applied as follows 1 for the processing of hard polyethylene

RPVC products such as a directly extruding plate tube various profiles etc 2 the physical modification of the polymer is mixed filled and enhanced to carry out two different types of polymers Mix to get the properties of the blend required Add inorganic or organic filler in the polymer for example to improve strength performance or ultra high strength fibers are added into the polymer such as carbon fiber or cassia carbide fiber to form a high strength high heat resistance materials 3 the preparation of color masterbatch pigments and a variety of additives are added to the polymer the polymer staining or to improve its processability and gives its specific physical and chemical properties 4 chemical reactions such as polymerization and condensation of monomers as polymer synthesis reactors or for plastics rubber and Concentrated exhaust dehydration extrusion drying extraction monomer etc 5 substitute the mixer for mixing the powder resin which is for the feed of the calendering machine or with the granulator and the metering combination In the granulation 6 it is used in plastic recycling to recycle the waste materials and waste materials in plastic processing

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