Plastic contract manufacturing is the process of manufacturing plastic products on a contract basis. There are many contract manufacturers of plastic products, rubber products and other specialty chemical products. They produce fabricated and extruded plastic products. The plastic fabrication facility of most of the plastic contract manufacturers include the latest Computerized Numerical Control (CNC) routers, mills and lathes for top quality machining of plastic parts and products. Plastic contract manufacturers handle plastic fabrication, CNC machining and CNC turning projects. They usually make plastic products from both natural and synthetic materials. Contract manufacturing of plastic provides plastic products of high abrasion resistance, high tensile strength, high tear strength and good oil resistance.

Plastic contract manufacturers usually make plastic products, components and assemblies at the lowest possible prices. They work together with their customers to determine the materials needed, time taken, design specifications, production developments and certifications required. Contract manufacturers of plastics come up with plastic products in any size, design or quantity, according to the needs of the customer. Most contract manufacturers have a full range of services for design engineering and manufacturing of plastic products.

Plastic contract manufacturing mainly focuses on the quality, repeatability and performance of plastic products. Some contract manufacturers specialize in producing the plastic components for high precision electronic and electrical products, consumer products, automobile products and parts. Many of them also manufacture the press components and precision components of other engineering plastics. Plastic contract manufacturers usually manufacture containers, jars, jigs and fixtures. Generally, contract manufactures use advanced technologies in injection blow molding and compression molding to produce high precision components for electronics and electrical plastics. The materials used in plastic contract manufacturing include low density polyethylene (LDPE), linear low density polyethylene (LLDPE), polypropylene (PP), polyethylene terephthalate (PET), polyvinyl chloride (PVC) and high density polyethylene (HDPE).

Injection molding is widely used for thermoplastics. This process avoids the hardening of plastic in the machine. Injection molding helps to produce more accurate moldings having better control on the material usage. Many contract manufacturers of plastic specialize in the manufacturing dies for injection molded products such as plastic compounds, fan regulators, fan regulator switches, electrical rotary switches, fuse boxes and other special purpose machine parts.