Polymers will continue to replace other materials on an increasing scale. The polymers already perform satisfactorily in many applications previously employing metal, wood, paper, glass etc. Usage of polymers are already well established in Automobile, electronics, Telecommunication, Computer, Toys, Medical application, clock, houseware, plumbing, footwear, electrical switch gears, luggage,etc. New polymers with specific properties and applications are being developed. With the result , number of polymers with properties suitable for specific applications are now available.
Reasons for replacement of trditional materials:
- Availability of stronger, stiffer polymers.
- Development of processing techniques to exploit the properties,
- Design posibilities of plastics,
- Availability of accurate, meaningful data on the mechanical properties of polymers.
- Greater willingness on the part of engineers to consider plastics as raw materials in their own right, rather than substitute,
- Increasing awarness of the cost saving, enegy saving, labour saving and ease of manufacturing technique.
It is not correct to say that PLASTICS will generally and universally replace all materials. Need for replacement of any part should arise from functional requirement, ease of fabrication, cost with out compromising functional needs, lower weight, lower energy requirement. New polymers with specific properties and applications are being developed.
The part should be designed with plastics material, by considering the
- Functional needs
- Service condition
- Mechanical loading and duration of loading
- Polymer melt behaviour ( flow, shrinkage, response to shearing )
- Strength of material
- Properties of plastics and
- Processing (conversion- fabrication) technique.
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HDPE |
HIGH DENSITY POLYETHYLENE |
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LDPE |
LOW DENSITY POLYETHEYLENE |
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PP |
POLYPROPYLENE |
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PS |
POLYSTYRENE |
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CA |
CELULOSE ACETATE |
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RPVC |
RIGID POLY VINYLE CLORIDE |
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SPVC |
SOFT POLY VINYL CLORIDE |
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ABS |
ACRYLONITRILE BUTADINE STYRENE |
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POM |
ACETAL--POLYOXYMETHYLENE POLYFORMALDEHYDE |
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PMMA |
ACRYLIC--POLYMETHYL METHACRYLATE |
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PPO |
POLYPHENYLENE OXIDE |
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PA |
POLYAMIDE --NYLONE |
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PC |
POLYCARBONATE |
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PES |
POLYETHERSULPHONE |
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PBT |
POLYBUTYLENE TETRAPHALATE |
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PPS |
POLYPHENYLENE SULPHIDE |
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PETP |
POLYETHYLENE TETRAPHTHALATE |
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PEEK |
POLYTHERETHERKETONE |
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PP(copolymer) |
POLYPROPYLENE |
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SAN |
ACRYLONITRILE STYRENE |
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TPU |
THERMOPLASTIC POLYURATHANE |
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Click here to see Application table
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