Plastic processing technologies blow molding

At the heart of the process is the blow-molding machine. This technology is not unique to aseptic (Mocessing. In the machine, molten plastic is extruded under high temperatures (around 200 C) and pressures (350 bar) as a hollow... 

Blow molded parts demonstrate that, from technical and cost standpoints, BM offers a promising alternative to other processes, particularly injection molding (IM) and thermoforming. The technical evolution of BM, plus accompanying improvements and new developments in plastics, has led to new BM parts. With the coextrusion technology now established and the hardware in place, the variety of achievable properties can readily be extended by the correct combination of different materials (see Chapter 3). The potential for BM products includes much more than the simple bottles that have been made for many decades. Now the expertise and economics of the method are such that many ideas once deemed futuristic are much closer to realization (2, 96, 186-212). 

Extrusion blow molding is by far the most important method, with reference to both the size of the product and the amount of plastics processed. With today s technology, pieces with volumes from 1 cm to 10 m can be blown. This enormous size range does include packaging, storage, and transport containers, but it mainly... 

The performance of many products is based on their overall shape, not just in terms of appearance, but in terms of function as well. The shape and form of the plastic parts in that product play an important role. While some shapes are a function of the processing technology used, such as a blow molded beverage container, sometimes shapes are based on the unique... 

Thermoplastic properties can be varied by mixing low- or high-density polyolefines, com starch and plasticizers. They all can be processed by typical plastics technologies, such as molding or film-blowing. Such resins contain up to 60-75% natural materials and up to 40% synthetic polymers. 

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