Today's KNOWLEDGE Share: POM (part 1):
Today's KNOWLEDGE Share:
POM (part 1):What is Acetal Plastic?
Acetal is a plastic that is generically referred to as polyacetal and polyoxymethylene (POM) and is a general purpose, semi-crystalline, engineered thermoplastic. Acetal is commonly used for parts that need to be very stiff, have low surface friction and good dimensional stability. Dimensional stability is the ability of a plastic part to maintain its original dimensions when it is exposed to changes in temperature and humidity.
What is an engineered plastic?
Engineered plastics have better mechanical properties and handle heat better than commodity plastics. This makes them tougher and more suitable for extreme environments. Commodity plastics are simply not as tough. Some familiar commodity plastics are PVC, polyethylene and polypropylene.
What are semi-crystalline plastics?
Semi-crystalline plastics have a very organized molecular structure and sharp melting points. They will not gradually soften as their temperature increases. Instead, they stay solid until their melting point is reached. When they are hot enough, semi-crystalline plastics quickly change from solids into low viscosity or thin liquids that flow easily.
The temperature range in which Acetal, with a melting point that varies by its type, can operate effectively is between -40F to 180F (40C to 82C).
Copolymer and homopolymer acetal plastics:
Acetal is made in slightly different formulation variations sold under various trade names. Each trade name acetal plastic is also usually made in a range of recipes that are adjusted to improve specific properties. One thing that all acetal plastics have in common is that they are either a copolymer acetal or a homopolymer acetal. The differences between copolymer and homopolymer acetal plastics are relatively small but they are measurable.
Some of the better-known acetal plastic trade names:
Acetron® - copolymer and homopolymer acetals made by Mitsubishi
Celcon® - copolymer acetals made by Celanese
Delrin® - homopolymer acetals made by the DuPont™
Duracon® POM - copolymer acetals made by Polyplastics
Hostaform® - copolymer acetals made by the Celanese
Kepital® POM – copolymer and homopolymer acetals made by KEP (Korea Engineering Plastics)
Sustarin® C – copolymer and homopolymer acetals made by Rรถchling
Tecaform® - copolymer and homopolymer acetals made by Ensinger
Tenac™-C - copolymer and homopolymer acetals made by Asahi Kasei
Tepcon® - copolymer acetals made by Polyplastics
Ultraform® - copolymer acetals made by BASF
(to be continued )
Source:industrialspec.com
#plastics #engineeringplastics #pom #acetal
What are semi-crystalline plastics?
Semi-crystalline plastics have a very organized molecular structure and sharp melting points. They will not gradually soften as their temperature increases. Instead, they stay solid until their melting point is reached. When they are hot enough, semi-crystalline plastics quickly change from solids into low viscosity or thin liquids that flow easily.
The temperature range in which Acetal, with a melting point that varies by its type, can operate effectively is between -40F to 180F (40C to 82C).
Copolymer and homopolymer acetal plastics:
Acetal is made in slightly different formulation variations sold under various trade names. Each trade name acetal plastic is also usually made in a range of recipes that are adjusted to improve specific properties. One thing that all acetal plastics have in common is that they are either a copolymer acetal or a homopolymer acetal. The differences between copolymer and homopolymer acetal plastics are relatively small but they are measurable.
Some of the better-known acetal plastic trade names:
Acetron® - copolymer and homopolymer acetals made by Mitsubishi
Celcon® - copolymer acetals made by Celanese
Delrin® - homopolymer acetals made by the DuPont™
Duracon® POM - copolymer acetals made by Polyplastics
Hostaform® - copolymer acetals made by the Celanese
Kepital® POM – copolymer and homopolymer acetals made by KEP (Korea Engineering Plastics)
Sustarin® C – copolymer and homopolymer acetals made by Rรถchling
Tecaform® - copolymer and homopolymer acetals made by Ensinger
Tenac™-C - copolymer and homopolymer acetals made by Asahi Kasei
Tepcon® - copolymer acetals made by Polyplastics
Ultraform® - copolymer acetals made by BASF
(to be continued )
Source:industrialspec.com
#plastics #engineeringplastics #pom #acetal
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