MCA
Performance Engineered Products (Formerly MCA Molding Corporation of America)
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RESOURCES
PART DESIGN
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RESINS
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Resin Guide
Acetal
(POM)
Features:
High Strength
Wear Resistant
Chemical Resistant
High Gloss
Disadvantages:
Poor resistance to acids
Subject to UV degradation
Flammable
Difficult to bond
Uses:
Bearings, fasteners, gears, pulleys, springs, toys, valve parts, zippers.
Trade Names:
Ashlene, Celcon, Delrin
Acrylic
(PMMA)
Features:
Excellent optical clarity
Excellent weatherability and resistance to sunlight
Rigid with good impact resistance
Good light transmission
Disadvantages:
Poor solvent resistance
Subject to stress cracking
Low continuous service temperature
Poor impact resistance
Uses:
Glass replacement, lenses, casings, aquariums.
Trade Names:
Acrylite, Kydex, Plexiglas
Acrylonitrile Butadiene Styrene
(ABS)
Features:
Medium impact resistance
Good processability and appearance
Dimensional stability
General Purpose
High Gloss
Metal platable
Available in clear
Good Balance of Properties
Disadvantages:
Limited weathering resistance
Moderate heat, moisture and chemical resistance
Flammable with high smoke generation
Uses:
Calculators, aircraft interiors, cell phones, appliances, audio tapes, automotive bumpers, automotive electronics, computer components, white water canoes, beverage containers, food containers, cosmetics, toys (legos).
Trade Names:
Cycolac, Lustran, Polylac, Trilac
Acrylonitrile Butadiene Styrene / Polycarbonate
(ABS/PC)
Features:
Good impact resistance
Good processability and appearance
Dimensional stability
General Purpose
High Gloss
Metal platable
Available in clear
Disadvantages:
Limited weathering resistance
Moderate heat, moisture and chemical resistance
Flammable with high smoke generation
Uses:
Calculators, Aircraft Interiors, Cell Phones, Appliances, Audio Tapes, Automotive Bumpers, Automotive Electronics, Computer Components, Connectors, Instrument Panel, Beverage Containers, Food Containers, Cosmetics, Toys.
Trade Names:
Bayblend, Cycoloy
High Density Polyethylene
(HDPE)
Features:
Durable
Good stiffness
Impact resistant
Food grades available
Low cost
Moisture resistance
Good chemical resistance
Disadvantages:
Poor weather resistance
Flammable
High thermal expansion
Difficult to bond
Uses:
Consumer products, houseware items, detergent bottles, milk jugs, food storage containers, electronic wire/cable insulators and medical products.
Trade Names:
Alathon, Borealis, Certene, Dow, ExxonMobil, HiFill, Marlex, Unipol
Low Density Polyethylene
(LDPE)
Features:
Good impact strength
Crack resistant
Excellent flexibility
Low cost
Moisture resistance
Food grades available
Good chemical resistance
Disadvantages:
Poor weather resistance
Flammable
High thermal expansion
Difficult to bond
Uses:
Consumer products, houseware items, electronic wire/cable insulators, siding, clamshell packaging, medical products.
Trade Names:
Borealis, Certene, Dow, ExxonMobil, Marlex
Polyamide
(Nylon 6 PA)
Features:
Food contact acceptable
Easily processed
Temperature resistance
Unfilled and glass filled available
Good melt flow
Disadvantages:
Degraded by UV
High moisture absorptivity
Attacked by strong acids/bases
Uses:
Automotive components, bearings, electronic connectors, gears, consumer products and industrial products, medium stress components.
Trade Names:
Akromid, Celanese, Celstran, Zytel
Polyamide
(Nylon 6/6 PA)
Features:
Good heat resistance
Excellent chemical resistance
High resistance to abrasion
Withstands repeated impact
Disadvantages:
Absorbs moisture
Requires UV stability
Attacked by strong acids/bases
High notch sensitivity
Uses:
Automotive Components, Electronic Connectors, Gears, Clips, Fasteners, Levers, Bushings. Uses Requiring Heat, Chemical and Wear Resistance
Trade Names:
Adell, HiFill, Ultramid, Zytel
Polybutylene Terephthalate
(PBT)
Features:
Excellent wear resistance
Excellent chemical resistance
Food contact acceptable
High impact strength
Disadvantages:
Difficult to fill thin parts
Poor resistance to acid
Moderate to high price
Uses:
Industrial equipment applications, power tool casings, electronic components, housings, automotive connectors, computer keybuttons.
Trade Names:
Celstran, Celanex, Crastin, Valox
Polycarbonate
(PC)
Features:
Dimensionally stable
Easily processed
Clear
High impact resistance
Disadvantages:
High processing temperatures required
Aromatic sensitivity
Chemical resistance is only fair
Moderate to high price
Uses:
Bottles, cups, LEDs, lenses, lighting applications, single use containers.
Trade Names:
Calibre, Hopolex, Hylex , Lexan, Makrolon
Polyether Ether Ketone
(PEEK)
Features:
Good sterilizability
Good chemical resistance
High strength and stiffness
food contact acceptable
Disadvantages:
Moderate to high price
Uses:
Engineering applications, medical, healthcare.
Trade Names:
Victrex
Polyetherimide
(PEI)
Features:
High heat resistance
Food contact acceptable
High strength
Broad chemical resistance
Biocompatible
Disadvantages:
High processing temperatures required
Limited colorability
Relatively high material and processing costs
Uses:
Medical/healthcare applications, thin walled parts, containers for liquids and foods, cooking utensils, fiber optics.
Trade Names:
Duron, Ultem
Polysulfone
(PSU)
Features:
Thermal stability
Heat resistant
High strength
Low moisture absorption
Available in transparent
Disadvantages:
High cost
Poor weatherability
Difficult to process
Uses:
Medical/Healthcare Applications, food services, hydraulic applications.
Trade Names:
Udel, Ultrason, Mindel, HiFill, Thermocomp
Polyethylene
(PE)
Features:
Corrosion resistant
High Heat Resistance
Good Toughness
Low weight
Impact resistant
High flexibility
Disadvantages:
Poor weatherability
High thermal expansion
Flammable
Subject to stress cracking
Uses:
Buckets, toys, consumer products.
Trade Names:
Alathon, Bapolene, Dow, Marlex
Polyethylene Terepthalate
(PET)
Features:
Easily processed
Clarity
Some grades FDA approved
Good flow
Disadvantages:
High processing temps required
Uses:
Reusable bottles, pacifiers, sippy cups, carbonated drinks bottles, medical devices, housewares, microwavable packaging.
Trade Names:
Celanex, HiFill, Petra, Ramapet, Valox
Polyphenylene Sulfide
(PPS)
Features:
High Heat Resistance
High Stiffness
Wear Resistant
Excellent dimensional stability
Flame retardant
Disadvantages:
High costs
Difficult to process
Fillers required for good impact strength
Uses:
Hydraulic components, medical/healthcare, metal replacement, electronic parts.
Trade Names:
Celstran, Fortron, Lubricomp, Ryton, Supec.
Polypropylene
(PP)
Features:
Good impact strength
Easily processed
Living hinge/Mold-in hinge
Food contact acceptable
Highly moisture resistance
Disadvantages:
Degraded by UV
Flammable, but retarded grades available
Attacked by chlorinated solvents and aromatics
Difficult to bond
Uses:
Packaging, living hinge applications, toys, bottle caps, food containers, fruit baskets, consumer goods.
Trade Names:
Adell, Borealis, Celstran, Certene, Hival, Lupol, Profax
Polystyrene
(PS)
Features:
Optical Clarity
Food contact acceptable
Flame retardant
Fast cycle time
Expandable
High gloss
Low cost
Disadvantages:
Homopolymers are brittle
Poor solvent resistance, attacked by many chemicals
Flammable, but retarded grades available
Subject to stress and environmental cracking
Uses:
Disposable tableware, food containers.
Trade Names:
Certene, Hival, Polystyrol, Styron, Starex
Styrene Acrylonitrile
(SAN)
Features:
High gloss
Dimensionally Stable
High clarity
High Flow and Rigidity
Disadvantages:
Higher water absorption than polystyrene
Low thermal capability
Low impact strength
Flammable with high smoke generation
Yellows more quickly than PS
Uses:
Dials, knobs, switches, lenses, trays, containers, cosmetic packaging.
Trade Names:
Lustran, Luran, Absolan
Thermoplastic Elastomer
(TPE)
Features:
Good adhesion
Good Flexibility
Good tear strength
Disadvantages:
Relatively high cost
Temperature sensitive
Uses:
Rubber replacement, bicycle grips, flexible grip, gaskets, overmolding.
Trade Names:
CoolPoly, Dynaflex, Elastamax, Elastocon, Monprene, Versaflex, Santoprene
Thermoplastic Polyurethane
(TPU)
Features:
Abrasion Resistant
Impact Strength
Good Tear Strength
Good Flexibility
Oil Resistant
Disadvantages:
Narrower hardness range than other TPEs
Lower stiffness than similar PET
Drying required pre-processing
Uses:
Footwear, O-rings, overmolding, power cable jacketing, sporting goods.
Trade Names:
Desmopan, Elastollan, Estane, Pearlthane, Pellethane
Source: prospector.com.