What process is uhmw plastic sheet made of？
Uhmw plastic sheet manufacturing process:
1.Molding, engineering plastic uhmwpe has excellent comprehensive properties in the solid state, but its melt characteristics are very different from ordinary polyethylene plastics, which brings difficulties to processing. Not affected by the relative molecular weight of uhmwpe, even the world’s relatively high molecular weight uhmwpe (up to 10 million) can be processed.
2.During blow molding and processing of ultra-high molecular weight polyethylene (UHMW-PE), when the material is extruded from the die, there is a certain shrinkage due to elastic recovery, and almost no sagging occurs, so it is a hollow container. In particular, the blow molding of large containers, such as fuel tanks and vats, has created favorable conditions.
Uhmw plastic sheet blow molding can also lead to high-performance films with balanced strength in the vertical and horizontal directions, thereby solving the problem of HDPE film inconsistent strength in the vertical and horizontal directions for a long time, which easily causes longitudinal damage.
3.Extrusion molding Extrusion molding equipment mainly includes plunger extruder, single screw extruder and twin screw extruder. For twin-screw extrusion, co-rotating twin-screw extruders are mostly used.
The characteristics of ultra-high molecular weight polyethylene ranks first among heavy plastics. When it comes to polyethylene machine parts, I believe everyone is not unfamiliar. Polyethylene special-shaped parts are very widely classified products in polyethylene series products, with a large number of products and a wide range of industries ,E.g:
1.The application of polyethylene special-shaped parts in transportation machinery includes: guide rails, conveyor belts, slider seats of conveyors, fixed plates, timing star wheels of production lines, etc.
2.In food machinery, polyethylene special-shaped parts are: star wheel, bottle feeding counting screw, filling machine bearing, bottle catcher part, gasket guide pin, cylinder, gear, roller, sprocket handle, etc.Polyethylene special-shaped parts are used in papermaking machinery such as suction box cover, deflector, scraper, bearing, nozzle, filter, oil reservoir, anti-wear bar, felt cleaner, etc.
3.The use on textile machinery includes: stenter, damper baffle, connector, crankshaft connecting rod, shuttle rod, sweeping needle, bias rod bearing, swinging rear beam and so on.
The abrasion resistance and chemical resistance of uhmw plastic sheet make it unique in chemical machinery. Acid-resistant pumps, transmission machinery, water pumps, bushings, gaskets, gears, etc. made of ultra-high molecular weight polyethylene instead of metal materials, not only greatly extend the service life, but also greatly reduce the cost. Ultra-high molecular weight polyethylene can also be used as a modification additive, which can be added to other compounds to improve its chemical properties. For example, the use of a vibration rotary mixer can penetrate the molten ultra-high molecular weight polyethylene into the polypropylene, so that the amorphous ultra-high molecular weight polyethylene and polypropylene form a complex continuous network structure, thereby improving the elongation at break of polypropylene and Yield Strength. UHMWPE can also be used as an impact strength modifier, tensile strength modifier, and toughening enhancer for polypropylene.
