Klobbie process

Invented by E. J. C. Klobbie of Lankhorst Toawfabriken of the Netherlands this machine can handle a mixture of waste plastics with a mini- 

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Another of the plastic lumber manufacturers. Superwood Holdings PLC, licenses its patented process. There is currently one Superwood plant in Canada and another being started in Alabama. The process machinery was developed in Holland and is known as the Klobbie Process. Although HOPE, LDPE and PP are the primary raw materials for plastic lumber production, PET and ABS are allowed but controlled. Due to the fact that PVC will degrade and produce a poor product if present in a mix as a high proportion, it may only be present in small amounts without special additives being added. If a separate source of PVC is available, it can be used at a lower temperature by itself to produce a quality lumber product. Examples of plastic sources for the Superwood process are manufacturers of... 

Most processes for recycling of commingled plastics depend on a predominance of polyolefin in the mix to serve as a matrix within which the other components are dispersed. One of the early processes was the Mitsubishi Reverzer, which was developed in Japan. This process used a short-time, high-temperature, high-shear machine which could handle up to 50% filler. The plastics were first softened in a hopper and then mixed in an extruder. Products were formed in a variety of shapes by flow molding, extrusion, or compression molding. However, the equipment was never successfully marketed. The Klobbie process, developed in the Netherlands in the 1970s, consisted of an extruder... 

Because of the heterogeneous nature of the mixture, and presence of contaminants, the articles produced should have large cross-sections, so that small imperfections do not hinder the mechanical performance of the products. Products can be manufactured by continuous extrusion, compression molding, or by Klobbie-based intrusion processes. Intrusion process is a cross between conventional injection molding and extrusion. In this, the extruder first works and softens the thermoplastic mixture, which is poured into one of the molds without using screen packs or nozzles. Today s recycling equipments are capable of processing most types of mixed thermoplastic material, even with up to 30 to 40 percent contamination as unmelted polymers or nonpolymer materials such... 

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