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Plastic & Nylon product through Injection PDF Print E-mail

INJECTION MOULDING M/CThere are many types of materials that may be used in the injection molding process. Most polymers may be used, including all thermoplastics, some thermosets, and some elastomers. When these materials are used in the injection molding process, their raw form is usually small pellets or a fine powder. Also, colorants may be added in the process to control the color of the final part. The selection of a material for creating injection molded parts is not solely based upon the desired characteristics of the final part. While each material has different properties that will affect the strength and function of the final part, these properties also dictate the parameters used in processing these materials. Each material requires a different set of processing parameters in the injection molding process, including the injection temperature, injection pressure, mold temperature, ejection temperature, and cycle time. A comparison of some commonly used materials is shown below (Follow the links to search the material library).

 

Material name

Abbreviation

Trade names

Description

Applications

Acetal

POM

Celcon, Delrin, Hostaform, Lucel

Strong, rigid, excellent fatigue resistance, excellent creep resistance, chemical resistance, moisture resistance, naturally opaque white, low/medium cost

Bearings, cams, gears, handles, plumbing components, rollers, rotors, slide guides, valves

Acrylic

PMMA

Diakon, Oroglas, Lucite, Plexiglas

Rigid, brittle, scratch resistant, transparent, optical clarity, low/medium cost

Display stands, knobs, lenses, light housings, panels, reflectors, signs, shelves, trays

Acrylonitrile Butadiene Styrene

ABS

Cycolac, Magnum, Novodur, Terluran

Strong, flexible, low mold shrinkage (tight tolerances), chemical resistance, electroplating capability, naturally opaque, low/medium cost

Automotive (consoles, panels, trim, vents), boxes, gauges, housings, inhalors, toys

Cellulose Acetate

CA

Dexel, Cellidor, Setilithe

Tough, transparent, high cost

Handles, eyeglass frames

Polyamide 6 (Nylon)

PA6

Akulon, Ultramid, Grilon

High strength, fatigue resistance, chemical resistance, low creep, low friction, almost opaque/white, medium/high cost

Bearings, bushings, gears, rollers, wheels

Polyamide 6/6 (Nylon)

PA6/6

Kopa, Zytel, Radilon

High strength, fatigue resistance, chemical resistance, low creep, low friction, almost opaque/white, medium/high cost

Handles, levers, small housings, zip ties

Polyamide 11+12 (Nylon)

PA11+12

Rilsan, Grilamid

High strength, fatigue resistance, chemical resistance, low creep, low friction, almost opaque to clear, very high cost

Air filters, eyeglass frames, safety masks

Polycarbonate

PC

Calibre, Lexan, Makrolon

Very tough, temperature resistance, dimensional stability, transparent, high cost

Automotive (panels, lenses, consoles), bottles, containers, housings, light covers, reflectors, safety helmets and shields

Polyester - Thermoplastic

PBT, PET

Celanex, Crastin, Lupox, Rynite, Valox

Rigid, heat resistance, chemical resistance, medium/high cost

Automotive (filters, handles, pumps), bearings, cams, electrical components (connectors, sensors), gears, housings, rollers, switches, valves

Polyether Sulphone

PES

Victrex, Udel

Tough, very high chemical resistance, clear, very high cost

Valves

Polyetheretherketone

PEEKEEK

 

Strong, thermal stability, chemical resistance, abrasion resistance, low moisture absorption

Aircraft components, electrical connectors, pump impellers, seals

Polyetherimide

PEI

Ultem

Heat resistance, flame resistance, transparent (amber color)

Electrical components (connectors, boards, switches), covers, sheilds, surgical tools

Polyethylene - Low Density

LDPE

Alkathene, Escorene, Novex

Lightweight, tough and flexible, excellent chemical resistance, natural waxy appearance, low cost

Kitchenware, housings, covers, and containers

Polyethylene - High Density

HDPE

Eraclene, Hostalen, Stamylan

Tough and stiff, excellent chemical resistance, natural waxy appearance, low cost

Chair seats, housings, covers, and containers

Polyphenylene Oxide

PPO

Noryl, Thermocomp, Vamporan

Tough, heat resistance, flame resistance, dimensional stability, low water absorption, electroplating capability, high cost

Automotive (housings, panels), electrical components, housings, plumbing components

Polyphenylene Sulphide

PPS

Ryton, Fortron

Very high strength, heat resistance, brown, very high cost

Bearings, covers, fuel system components, guides, switches, and shields 

Polypropylene

PP

Novolen, Appryl, Escorene

Lightweight, heat resistance, high chemical resistance, scratch resistance, natural waxy appearance, tough and stiff, low cost.

Automotive (bumpers, covers, trim), bottles, caps, crates, handles, housings

Polystyrene - General purpose

GPPS

Lacqrene, Styron, Solarene

Brittle, transparent, low cost

Cosmetics packaging, pens

Polystyrene - High impact

HIPS

Polystyrol, Kostil, Polystar

Impact strength, rigidity, toughness, dimensional stability, naturally translucent, low cost

Electronic housings, food containers, toys

Polyvinyl Chloride - Plasticised

PVC

Welvic, Varlan

Tough, flexible, flame resistance, transparent or opaque, low cost

Electrical insulation, housewares, medical tubing, shoe soles, toys

Polyvinyl Chloride - Rigid

UPVC

Polycol, Trosiplast

Tough, flexible, flame resistance, transparent or opaque, low cost

Outdoor applications (drains, fittings, gutters)

Styrene Acrylonitrile

SAN

Luran, Arpylene, Starex

Stiff, brittle, chemical resistance, heat resistance, hydrolytically stable, transparent, low cost

Housewares, knobs, syringes

Thermoplastic Elastomer/Rubber

TPE/R

Hytrel, Santoprene, Sarlink

Tough, flexible, high cost

Bushings, electrical components, seals, washers

 

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