Polyacetal are resins with high crystalline structure. Two are the main types:
- Homopolymer
- Copolymer
Homopolymer
The molecular structure of the Homopolymer, obtained by polymerization of Formaldehyde, presents several identical units:
– (– CH2O – ) n –
Homopolymer present a lower heat resistance and oxygen resistance either during processing or on the final product, having unstable links among its molecular structure, despite of better characteristics such as:
- higher melting point
- higher rigidity
- higher hardness
- shorter molding time
when compared to Copolymer.
Copolymer
In random positions of the Copolymer molecular structure, obtained by copolymerization of Trioxan (Formaldehyde Trimer) there is a different monomer:
HO – Y – [– (CH20)n – Y ] – CH2 – Y – H
The linear structure and its enhanced crystalline grade give the copolymer good physicalmechanical properties, for high-tech applications instead of other tech-polymers or even metal Also available with glass filling for injection molding of items where high stiffness, hardness, lower thermal deformation and low mold shrinkage are required.
Its characteristics are as follows:
- Toughness even at low temperatures
- Rigidity and hardness
- Creep resistance
- Thermal and dimensional stability
- Low friction coefficient
- Abrasion resistance
- Good electrical properties
Main fields of application
- Gas meter and water meter particulars
- Commuter disks ( current meters)
- Toothed gears and bearings
- Small gears for house appliances and automotive
- Car handle (doors and windows)
- Coils body, switches parts
- Cameras parts
- Bearing cages
- Pumps and parts related to gas feeding
- Gas tank cover
- Furniture accessories
- Small toys parts
- Hydraulic components
- Cloth washing and dish washing electro-valves and timers
- Lighter tanks
- Computer parts
- Zippers
Industrial grade Acetal
Industrial grade Acetal are in form of dull natural, medium flow and high flow types. Black is also available for general purpose. Reprocessing of Acetal, either from regrind or from pellets, can be successfully done because the loss of the main characteristics, due to further processing, is very small.
Obviously it is compulsory that the material must not be contaminated with foreign resins and thermal degradation has not occurred in previous processes.
- Homopolymer
- Copolymer
Homopolymer
The molecular structure of the Homopolymer, obtained by polymerization of Formaldehyde, presents several identical units:
– (– CH2O – ) n –
Homopolymer present a lower heat resistance and oxygen resistance either during processing or on the final product, having unstable links among its molecular structure, despite of better characteristics such as:
- higher melting point
- higher rigidity
- higher hardness
- shorter molding time
when compared to Copolymer.
Copolymer
In random positions of the Copolymer molecular structure, obtained by copolymerization of Trioxan (Formaldehyde Trimer) there is a different monomer:
HO – Y – [– (CH20)n – Y ] – CH2 – Y – H
The linear structure and its enhanced crystalline grade give the copolymer good physicalmechanical properties, for high-tech applications instead of other tech-polymers or even metal Also available with glass filling for injection molding of items where high stiffness, hardness, lower thermal deformation and low mold shrinkage are required.
Its characteristics are as follows:
- Toughness even at low temperatures
- Rigidity and hardness
- Creep resistance
- Thermal and dimensional stability
- Low friction coefficient
- Abrasion resistance
- Good electrical properties
Main fields of application
- Gas meter and water meter particulars
- Commuter disks ( current meters)
- Toothed gears and bearings
- Small gears for house appliances and automotive
- Car handle (doors and windows)
- Coils body, switches parts
- Cameras parts
- Bearing cages
- Pumps and parts related to gas feeding
- Gas tank cover
- Furniture accessories
- Small toys parts
- Hydraulic components
- Cloth washing and dish washing electro-valves and timers
- Lighter tanks
- Computer parts
- Zippers
Industrial grade Acetal
Industrial grade Acetal are in form of dull natural, medium flow and high flow types. Black is also available for general purpose. Reprocessing of Acetal, either from regrind or from pellets, can be successfully done because the loss of the main characteristics, due to further processing, is very small.
Obviously it is compulsory that the material must not be contaminated with foreign resins and thermal degradation has not occurred in previous processes.
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