Injection moldable thermoplastic materials

Posted by Hortn Wayes on March 18th, 2019

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.

The electronic devices and parts manufacturers develop new products in conjunction with the rapid advancement in technology. To stay competitive, it is required to design, test, and manufacture electronic products rapidly.  In addition, "in-house" control & confidentiality are particularly important during the product development phase.

St's plastic injection molding machines offer a significant role in developing devices for the electronic industry at an affordable level. Why? The equipment allow the use of far less expensive molds than would be required for production type molding machines.

By eliminating many of the high cost tooling features of the plastic mold, overall project costs can be reduced into a sensible product development budget, while keeping the confidentiality of designs fully in-house.

St's plastic injection molding solution often cost less than conventional molds alone.  It is truly a low-risk, low-cost alternative to getting the prototypes and samples developed by a 3rd party.  

Proven in wide range of applications in the electronic industry, St's plastic injection molding machines have a track record of reliable, profitable operation for hundreds of large and small companies representing various industries for over 30 years. Many St-Press users state that their unit paid for itself within the first year.