Plastic injection molding materials should be selected by application requirements such as load, heat, impact, chemical exposure, dimensional stability, surface finish, flexibility, flame rating, UV exposure and production cost. Common choices include ABS, PC, nylon, PP, PE, POM, PBT, TPE and PMMA.
Many molded part issues start with an unclear material choice. A resin that is easy to mold may not survive heat, load or chemical exposure, while a high-performance resin may increase cost or require design changes. A practical selection guide should connect part function with manufacturability.
Common Injection Molding Materials
| Cause / matière | Signe ou utilisation typique | Intervention de l'acheteur ou du service d'ingénierie |
|---|---|---|
| ABS | Housings, covers, consumer and industrial parts | Good processability and surface finish |
| PC | Impact-resistant and transparent components | Needs drying and stress-aware design |
| PA6 / PA66 nylon | Gears, brackets, wear parts and structural components | Check moisture absorption and glass fiber options |
| PP | Living hinges, clips, containers and lightweight parts | Good chemical resistance and fatigue behavior |
| POM / acétal | Precision gears, bushings and sliding parts | Good dimensional stability and wear resistance |
How to Choose a Plastic for Injection Molding
- Define the part’s load, temperature, chemical exposure and assembly method.
- Separate cosmetic requirements from functional requirements.
- Confirm whether the part needs stiffness, toughness, flexibility or wear resistance.
- Review shrinkage, moisture absorption and tolerance needs before tooling.
- Ask whether a prototype material can transition into production molding.
Material Selection by Application
| Matériau / boîtier | Principale préoccupation | Note relative à la sélection |
|---|---|---|
| Automotive under-hood parts | PA66 GF, PBT, PPS | Heat, chemical and dimensional stability matter |
| Electrical housings | ABS, PC-ABS, FR PC, PBT | Impact and flame rating may be required |
| Transparent covers | PC, PMMA | Balance impact strength and clarity |
| Flexible grips or seals | TPE, TPU | Hardness, bonding and compression set matter |
| Wear and sliding parts | POM, nylon, PTFE-filled grades | Friction, moisture and tolerance must be checked |
Buyer RFQ Details for Material Selection
Pour obtenir une analyse utile, veuillez nous envoyer le modèle 3D ou le dessin 2D, le type de résine ou le matériau cible, des photos de la pièce si le défaut est déjà présent, les informations relatives à la machine et au moule si elles sont disponibles, le volume annuel prévu, les exigences esthétiques, les cotes critiques, l'environnement d'application et toute norme d'inspection applicable. Nylon Plastic peut examiner la conception, le matériau et le procédé de moulage avant que des modifications ne soient apportées à l'outillage ou à la production.
Where Modified Nylon Fits in the Material Decision
| Material Direction | When It Is a Practical Starting Point | Checks Before Release |
|---|---|---|
| Unfilled PA | Toughness, fatigue, wear, surface quality, or a balanced cost target leads the decision | Moisture state, dimensional change, heat, load and chemical exposure |
| PA-GF20 | Moderate stiffness, creep control, and shrinkage reduction are needed without maximum reinforcement | Fiber orientation, weld-line strength, surface, tool wear and conditioned dimensions |
| PA-CF30 | Specific stiffness, lower thermal expansion, weight reduction, or a qualified electrical target matters | Conductivity, anisotropy, impact, tooling wear, flow direction and exact grade data |
| PP, HDPE or LDPE | The part requirement calls for an unmodified polyolefin route | Shrinkage, stiffness, chemical exposure, hinge behavior, color and application fit |
Unfilled PA, PA-GF20, and PA-CF30 are the primary modified-nylon directions to compare when a project needs a nylon-based molding solution. PP, HDPE, and LDPE remain general raw-material options and should not be treated as interchangeable with reinforced nylon.
Comment le plastique nylon contribue à la réalisation du projet
Nylon Plastic supports material selection and finished plastic-part manufacturing through its plastic injection molding service. For injection molding material selection, the useful review connects the drawing, material, tooling or machining route, inspection state, and production plan before a quote is approved.
- Translate load, temperature, humidity, chemicals, tolerance, appearance, annual volume, and approvals into a grade requirement.
- Review custom modified nylon compounds when a standard PA grade misses stiffness, impact, wear, heat, color, or compliance needs.
- Connect the selected resin to drying, shrinkage, gate and vent design, sampling, COA, moisture, and lot-traceability controls.
Lire la suite
- Modified Nylon Engineering Plastics
- Nylon Material Selection for Molding
- Services de moulage par injection de nylon
Questions fréquemment posées
Compare detailed PA66 GF30 properties and grade selection across GF15, GF30 and GF60 glass fiber reinforcement levels in our dedicated glass-filled nylon guide.
What are the most common plastic injection molding materials?
Common choices include nylon, ABS, PC, PP, PE, POM, PBT, TPE, and PMMA. The correct material depends on the part requirement, processing route, and qualified grade.
When should I choose unfilled PA for injection molding?
Start with unfilled PA when toughness, fatigue, wear, surface quality, and a balanced cost target matter more than maximum stiffness or minimum shrinkage.
When is PA-GF20 or PA-CF30 appropriate?
PA-GF20 is a practical moderate-reinforcement direction. PA-CF30 is considered for specific stiffness, lower thermal expansion, weight, or qualified electrical requirements. Both require grade-specific validation.
Can prototype material become the production material?
Sometimes, but compare mechanical behavior, moisture, shrinkage, tolerance, appearance, compliance, processing, and cost in the final production route before approval.
Request an Injection Molding Material Review
Send the drawing, service environment, quantity, current resin, critical features, and approval requirements for a material and process comparison.
