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Engineering Plastics
How to Choose an Injection Molding Material
Compare function, environment, appearance, compliance, cost, and production requirements before selecting a resin.
Read How to Choose an Injection Molding Material
Injection Molding Material Hub
Plastic Materials for Injection Molding
Explore practical guides covering commodity plastics, engineering thermoplastics, elastomers, high-performance polymers, material comparisons, processing behavior, design limits, compliance, and application selection.
Material and process fit
Design and tooling impact
Application-based selection
Heat & strength
Flow & shrinkage
Finish & compliance
Choose around the actual part
Material selection should account for function, environment, geometry, appearance, quantity, tooling, and production control.
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Featured Plastic Material Guides
Start with these guides when you are comparing resin families, reviewing material behavior, or narrowing the options for a molded part.
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Engineering Plastics
PA6 and PA66 Injection Molding
Compare PA6 and PA66 around moisture, stiffness, heat, processing, and molded-part performance.
Read PA6 and PA66 Injection Molding03
Material Comparisons
ABS vs PC vs PA for Injection Molding
Compare toughness, heat, moisture, appearance, dimensional behavior, processing, and cost.
Read ABS vs PC vs PA for Injection Molding04
Commodity Plastics
Polystyrene (PS) Material
Review PS properties, molding behavior, common grades, applications, and design limits.
Read Polystyrene (PS) Material05
Material Comparisons
TPU vs Silicone
Compare flexibility, temperature, chemicals, compression set, processing, bonding, and cost.
Read TPU vs Silicone06
High-Performance Plastics
Heat-Resistant Plastics
Compare resin families for continuous heat, short-term peaks, creep, dimensional stability, and cost.
Read Heat-Resistant PlasticsCommodity Plastics
Common Resins for Cost-Sensitive Production
Commodity plastics are often selected for high-volume applications where cost, chemical resistance, appearance, or general-purpose performance matters more than extreme heat or structural capability.
4 material resourcesPolystyrene (PS) Material
Review PS properties, molding behavior, common grades, applications, and design limits.
HDPE Injection Molding
Understand HDPE flow, shrinkage, chemical resistance, warpage risk, and typical applications.
PET Material for Injection Molding
Review PET drying, crystallinity, processing, dimensional behavior, and part applications.
Acrylic Injection Molding
Explore PMMA transparency, surface quality, brittleness, drying, and molding considerations.
Engineering Plastics
Balance Strength, Heat, Appearance, and Processing
Engineering plastics and elastomers support more demanding mechanical, electrical, cosmetic, sealing, and assembly requirements. Their performance depends heavily on grade, moisture, reinforcement, processing, and part geometry.
15 material resourcesHow to Choose an Injection Molding Material
Compare function, environment, appearance, compliance, cost, and production requirements before selecting a resin.
ABS Injection Molding
Review ABS toughness, finish, shrinkage, processing, design guidance, and application fit.
ABS Plastic Enclosures for Electronics
Evaluate ABS for indoor electronic housings, bosses, ribs, vents, appearance, and assembly.
PC Injection Molding for Electronic Housings
Review polycarbonate impact, heat, transparency, drying, stress, and enclosure design considerations.
PA Injection Molding
Understand nylon moisture, strength, shrinkage, reinforcement, processing, and application limits.
PA6 and PA66 Injection Molding
Compare PA6 and PA66 around moisture, stiffness, heat, processing, and molded-part performance.
How Moisture Absorption Affects PA Injection Molding
See how moisture changes nylon dimensions, appearance, strength, storage, drying, and inspection.
POM Injection Molding
Review acetal stiffness, friction, dimensional stability, shrinkage, venting, and design risks.
PBT Plastic
Understand PBT electrical properties, moisture sensitivity, crystallinity, molding, and applications.
Thermoplastic Polyurethane (TPU) Injection Molding
Review TPU hardness, flexibility, drying, flow, shrinkage, demolding, and bonding considerations.
TPE Material for Injection-Molded Parts
Explore TPE softness, compression, bonding, overmolding, processing, and application selection.
Silicone Rubber Injection Molding
Review silicone curing, tooling, flash, part design, temperature resistance, and production needs.
Liquid Silicone Rubber for Injection-Molded Parts
Understand LSR material behavior, sealing applications, mold requirements, curing, and inspection.
Transparent Plastic Materials
Compare clear plastics around optical quality, impact, heat, scratches, chemicals, and molding.
Thermoplastic Mold Design and Material Selection
Connect resin choice with shrinkage, cooling, gates, ejection, tooling, and production requirements.
High-Performance Plastics
Materials for Heat, Chemicals, Precision, and Compliance
High-performance polymers can solve difficult thermal, chemical, electrical, dimensional, or regulatory requirements, but they also demand closer control of drying, tooling, mold temperature, cycle conditions, inspection, and cost.
9 material resourcesPEEK Injection Molding
Review high-temperature processing, crystallinity, tooling, drying, annealing, and application fit.
PEI Plastic
Understand PEI heat resistance, strength, transparency, drying, stress, and molding conditions.
PPS Plastic in Injection Molding
Review PPS heat, chemicals, glass filling, brittleness, mold temperature, and process control.
PPSU Material Injection Molding
Explore PPSU toughness, heat and steam resistance, drying, processing, and application needs.
PPA Plastic for Injection Molding
Review PPA heat, moisture, reinforcement, dimensional control, drying, and processing requirements.
LCP Material Injection Molding
Understand LCP flow, thin-wall capability, anisotropy, weld lines, tooling, and electronics applications.
Heat-Resistant Plastics
Compare resin families for continuous heat, short-term peaks, creep, dimensional stability, and cost.
Flame-Retardant Plastic Materials
Review flame-retardant grades, UL considerations, additives, performance tradeoffs, and molding.
Food-Grade Plastic Injection Molding Standards
Understand food-contact resin selection, traceability, compliance evidence, processing, and inspection.
Material Comparisons
Compare Resins Around the Real Application
A material comparison is useful only when it reflects the actual part requirements. Review stiffness, impact, heat, moisture, chemicals, dimensional stability, surface needs, processing, assembly, and expected volume together.
7 comparison resourcesABS vs PC vs PA for Injection Molding
Compare toughness, heat, moisture, appearance, dimensional behavior, processing, and cost.
TPU vs Silicone
Compare flexibility, temperature, chemicals, compression set, processing, bonding, and cost.
Difference Between PPO and PP Plastic
Compare heat resistance, stiffness, moisture, chemicals, processing, applications, and price.
LDPE vs HDPE
Compare density, stiffness, flexibility, shrinkage, chemical resistance, and typical applications.
Glass-Filled vs Unfilled PA
Compare nylon stiffness, strength, shrinkage, warpage, surface finish, wear, and moisture behavior.
ABS vs HDPE for Injection Molding
Compare rigidity, impact, appearance, chemicals, shrinkage, applications, and processing.
LSR and HTV Silicone Injection Molding
Compare liquid and high-consistency silicone around processing, tooling, applications, and part needs.
Selection Checklist
What to Confirm Before Choosing a Resin
Do not choose a material from a property table alone. The final grade must work with the part design, mold, process, assembly, quality plan, operating environment, and supply requirements.
Mechanical LoadsImpact, stiffness, fatigue, wear, creep, fastening, flexing, and expected service life.
Operating EnvironmentContinuous and peak temperature, moisture, UV, chemicals, cleaning, and outdoor exposure.
Part GeometryWall thickness, flow length, ribs, bosses, undercuts, weld lines, shrinkage, and warpage risk.
AppearanceColor, gloss, texture, transparency, scratches, sink tolerance, and visible gate requirements.
ProcessingDrying, melt temperature, mold temperature, cycle time, venting, tooling wear, and process window.
AssemblyThreads, inserts, snap fits, ultrasonic welding, adhesives, overmolding, coatings, and mating parts.
ComplianceFood contact, flame rating, medical, electrical, environmental, traceability, and test evidence.
Commercial FitResin availability, grade consistency, minimum purchase, color matching, scrap, cycle time, and annual volume.
Need Help Narrowing the Material Options?
Share the part function, operating environment, expected quantity, appearance, tolerance, assembly, and compliance requirements. Our team can reply by email so you can provide drawings and technical information securely.
Complete Directory
Browse All Plastic Material Articles
Use the category filters or search field to find all 35 material guides included in this resource hub.
Polystyrene (PS) Material
Review PS properties, molding behavior, common grades, applications, and design limits.
Read articleHDPE Injection Molding
Understand HDPE flow, shrinkage, chemical resistance, warpage risk, and typical applications.
Read articlePET Material for Injection Molding
Review PET drying, crystallinity, processing, dimensional behavior, and part applications.
Read articleAcrylic Injection Molding
Explore PMMA transparency, surface quality, brittleness, drying, and molding considerations.
Read articleHow to Choose an Injection Molding Material
Compare function, environment, appearance, compliance, cost, and production requirements before selecting a resin.
Read articleABS Injection Molding
Review ABS toughness, finish, shrinkage, processing, design guidance, and application fit.
Read articleABS Plastic Enclosures for Electronics
Evaluate ABS for indoor electronic housings, bosses, ribs, vents, appearance, and assembly.
Read articlePC Injection Molding for Electronic Housings
Review polycarbonate impact, heat, transparency, drying, stress, and enclosure design considerations.
Read articlePA Injection Molding
Understand nylon moisture, strength, shrinkage, reinforcement, processing, and application limits.
Read articlePA6 and PA66 Injection Molding
Compare PA6 and PA66 around moisture, stiffness, heat, processing, and molded-part performance.
Read articleHow Moisture Absorption Affects PA Injection Molding
See how moisture changes nylon dimensions, appearance, strength, storage, drying, and inspection.
Read articlePOM Injection Molding
Review acetal stiffness, friction, dimensional stability, shrinkage, venting, and design risks.
Read articlePBT Plastic
Understand PBT electrical properties, moisture sensitivity, crystallinity, molding, and applications.
Read articleThermoplastic Polyurethane (TPU) Injection Molding
Review TPU hardness, flexibility, drying, flow, shrinkage, demolding, and bonding considerations.
Read articleTPE Material for Injection-Molded Parts
Explore TPE softness, compression, bonding, overmolding, processing, and application selection.
Read articleSilicone Rubber Injection Molding
Review silicone curing, tooling, flash, part design, temperature resistance, and production needs.
Read articleLiquid Silicone Rubber for Injection-Molded Parts
Understand LSR material behavior, sealing applications, mold requirements, curing, and inspection.
Read articleTransparent Plastic Materials
Compare clear plastics around optical quality, impact, heat, scratches, chemicals, and molding.
Read articleThermoplastic Mold Design and Material Selection
Connect resin choice with shrinkage, cooling, gates, ejection, tooling, and production requirements.
Read articlePEEK Injection Molding
Review high-temperature processing, crystallinity, tooling, drying, annealing, and application fit.
Read articlePEI Plastic
Understand PEI heat resistance, strength, transparency, drying, stress, and molding conditions.
Read articlePPS Plastic in Injection Molding
Review PPS heat, chemicals, glass filling, brittleness, mold temperature, and process control.
Read articlePPSU Material Injection Molding
Explore PPSU toughness, heat and steam resistance, drying, processing, and application needs.
Read articlePPA Plastic for Injection Molding
Review PPA heat, moisture, reinforcement, dimensional control, drying, and processing requirements.
Read articleLCP Material Injection Molding
Understand LCP flow, thin-wall capability, anisotropy, weld lines, tooling, and electronics applications.
Read articleHeat-Resistant Plastics
Compare resin families for continuous heat, short-term peaks, creep, dimensional stability, and cost.
Read articleFlame-Retardant Plastic Materials
Review flame-retardant grades, UL considerations, additives, performance tradeoffs, and molding.
Read articleFood-Grade Plastic Injection Molding Standards
Understand food-contact resin selection, traceability, compliance evidence, processing, and inspection.
Read articleABS vs PC vs PA for Injection Molding
Compare toughness, heat, moisture, appearance, dimensional behavior, processing, and cost.
Read articleTPU vs Silicone
Compare flexibility, temperature, chemicals, compression set, processing, bonding, and cost.
Read articleDifference Between PPO and PP Plastic
Compare heat resistance, stiffness, moisture, chemicals, processing, applications, and price.
Read articleLDPE vs HDPE
Compare density, stiffness, flexibility, shrinkage, chemical resistance, and typical applications.
Read articleGlass-Filled vs Unfilled PA
Compare nylon stiffness, strength, shrinkage, warpage, surface finish, wear, and moisture behavior.
Read articleABS vs HDPE for Injection Molding
Compare rigidity, impact, appearance, chemicals, shrinkage, applications, and processing.
Read articleLSR and HTV Silicone Injection Molding
Compare liquid and high-consistency silicone around processing, tooling, applications, and part needs.
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Review material verification, process control, dimensions, appearance, records, sampling, and final inspection.
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