Injection moldable thermoplastic materials

by Hortn Wayes
Injection moldable thermoplastic materials

The physical properties of injection moldable materials vary from the soft flexibility of gum rubber to the brittleness of glass; temperature resistance varies from complete softening and dissolving in hot water to an ability to withstand a brief exposure to flame. Costs vary from a few cents to several dollars a pound.

The decision as to which material to use for an application need not be a difficult one since over ninety percent of thermoplastic parts used are made from no more than a dozen basic materials. Often a part can be successfully made from any one of a number of available materials. Listed in this section are the most commonly used thermoplastics with a brief description of their most notable characteristics and uses.

  • ABS 
  • ABS - A.B.S. is a copolymer - mixture of acrylic, butadiene, and styrene.
  • Acetal 
  • Acetal - Parts which must maintain a springiness such as latches and snap catches are usually made of acetal since it strives to retain its molded shape.

·        Plastic molds

·        Plastic Molding Company

  • Acrylic 
  • Acrylic - This material has good optical clarity.
  • Nylon 
  • Nylon - As any ardent fisherman will know, nylon is a tough material with a high resistance to abrasion.
  • Phenylene Oxide 
  • Phenylene Oxide - This is a high-temperature resistant material used for electrical components such as switch holdings and junction boxes.

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  • Polycarbonate 
  • Polycarbonate - This material is extremely tough. Impact resistance is its real asset.
  • Polyester 
  • Polyester - Polyester is dimensionally stable and has low moisture absorption.
  • Polyethylene 
  • Polyethylene - Many food containers used in the home are polyethylene.
  • Polypropylene 
  • Polypropylene - This is the lowest density common plastic.
  • Polysulfone 
  • Polysulfone - Polysulfone is strong, rigid and has a very high heat-deflection temperature along with excellent electrical properties.
  • Styrene 
  • Styrene - It has low resistance to chemicals and heat, will solvent bond easily.
  • Urethane 
  • Urethane - The wear resistance of this material is often many times that of rubber compounds.
  • Vinyl 
  • Vinyl - Most electrical wire coverings and plugs are made of vinyl.
March 18, 2019
by Hortn Wayes