UHMWPE bushing product production highlights

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2014-07-27

UHMWPE bushing product production methods
1, pressed and sintered
Pressed and sintered UHMWPE (UHMW-PE) of the original processing method. This method is quite low production efficiency, prone to oxidation and degradation. In order to improve production efficiency, the direct electrical heating method may be employed ; Further, Werner and Pfleiderer developed an ultra- high-speed processing method frit, using a mixer blade, up to the maximum rotation speed of the blades 150m / s, so that the material only processing temperature can be raised within a few seconds.
2, extrusion
Ram extrusion equipment are extruders, single screw extruders and twin-screw extruders. Twin-screw extruder to use more co-rotating twin -screw extruder.
1960s, mostly using a ram extruder, the mid-1970s, Japan, the United States, West Germany has developed a single-screw extrusion process. Mitsui Petrochemical company first made ​​a rod extrusion technology success in 1974. Developed country in late 1994 Φ45 type UHMWPE (UHMW-PE) single screw extruder, and made Φ65 single- screw extruder pipe production line industrial success in 1997.
3, injection molding
Mitsui Petrochemical Company in 1974 to develop the injection molding process and to achieve commercialization in 1976, and later developed a reciprocating screw injection molding technology. 1985 American Hoechst also achieved UHMWPE (UHMW-PE) of the screw injection molding process. Of 1983 on the domestic XS-ZY-125A -type injection molding machine has been transformed successfully injected a beer canning line with ultra-high molecular weight polyethylene (UHMW-PE) roller, water pump bushings, 1985 and successfully injected a medical artificial joints.
4, blow molding
Ultrahigh molecular weight polyethylene (UHMW-PE) during processing, when the material extruded from the die, due to the elastic recovery of a certain retracted, and the droop phenomenon hardly occurs, the container is hollow, especially in large containers, such as tanks, vats blow created favorable conditions. Ultrahigh molecular weight polyethylene (UHMW-PE) may cause blow molding vertically and horizontally balanced performance film strength, thereby solving the HDPE film strength vertically and horizontally long inconsistency exists, the problem is likely to cause damage to the longitudinal direction.

 

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