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What is plastic injection molding?

Injection molding plastics are the cornerstone of injection molding services, and this process is widely used in the mass production of custom injection molded plastic parts. These materials differ significantly due to the diversity of their properties and uses, mainly covering thermoplastics, thermosetting plastics and elastomers. Each category has its own unique characteristics and application scenarios, making material selection a crucial decision during injection molding.

Key considerations in injection molding plastic selection

1.Project requirements: First of all, the function, appearance and use scenario of the product are defined, including its durability and impact on the environment.

2.Budget considerations: Injection molding prices vary by material. When choosing a low-cost injection molding material, make sure your budget matches the entire process of plastic injection molding , including raw materials, processing and maintenance costs.

3.Performance comparison: Different materials have different performance characteristics, such as strength, flexibility and heat resistance. For example, HDPE is preferred for its strength and stiffness, while TPU is favored for its high elasticity.

4.Process feasibility: The manufacturability of materials is critical to production efficiency. Selecting materials that are easy to process, have a good flow rate and a short cooling time can help improve the efficiency of plastic molding injection.

5.Compliance requirements: Depending on the use of the product, specific industry standards and regulations may need to be met. Materials such as ABS and PC are the materials of choice for injection molding suppliers because they meet multiple safety and quality standards.

Why is material selection important for injection molding

1. Material cost and selection

When manufacturing a variety of injection molded plastic products, choosing the right injection molded plastic material is the key. The right material selection not only helps save additional injection molding processing costs, but also ensures the stability of product quality.

2. Avoid mold adjustment costs

Each injection molding plastic material has its own unique shrinkage rate, and injection molds are designed for specific shrinkage. Therefore, the right material choice is crucial. By selecting the matching material in advance, the suitability of the injection mold can be ensured, thus avoiding costly mold adjustment costs in the later stage.

3. Control manufacturing costs

The molding difficulty of injection molding plastic materials directly affects the production cost. Choosing the right material can not only meet the product design requirements, but also effectively control the price of the final product. In pursuit of cost-effectiveness, it is important to ensure that the materials selected meet product performance and quality expectations.

Plastic Injection Molding Materials

Subtitle Description

Name	Properties	Applications	Price
ABS	Physical properties: high strength, good toughness, impact resistance Chemical properties: chemical resistance, grease resistance, easy processing	automotive parts, toys, electronic housings, bags and kitchen appliances	＄＄
POM	Physical properties: high mechanical strength, wear resistance, fatigue resistance Chemical properties: chemical corrosion resistance, good insulation, good thermal stability	gears, bearings, electrical components	＄＄
PA	Physical properties: high strength, good rigidity, fatigue resistance Chemical properties: chemical corrosion resistance, easy water absorption, wear resistance	gears, bearings, electrical components, automotive parts	＄＄
PEEK	Physical properties: high strength, good toughness, good heat resistance Chemical properties: chemical corrosion resistance, wear resistance, high temperature resistance	aerospace components, medical equipment, electrical connectors	＄＄＄
PTFE	Physical properties: high temperature resistance, low temperature resistance, low friction coefficient Chemical properties: chemical corrosion resistance, good insulation, non-adhesion	Seals, gaskets, bearings	＄＄
PC	Physical properties: colorless, transparent, heat resistant, impact resistant Chemical properties: oil resistance, weak acid resistance, alkali resistance	electronic components, automotive parts, medical devices, safety hats	＄＄＄
PE	Physical properties: light weight, low temperature resistance, good insulation Chemical properties: chemical stability, acid and alkali resistance, good water resistance	Packaging, containers, toys	＄＄
PMMA	Physical properties: high transparency, high strength, easy to process Chemical properties: acid and alkali resistance, good weather resistance, easy dyeing	Lighting fixtures, automotive lenses, medical equipment	＄
PET	Physical properties: high transparency, high strength, good toughness Chemical properties: acid and alkali resistance, oil resistance, friction resistance	Bottles, jars, containers	＄
PP	Physical properties: light weight, wear resistance, shrinkage rate Chemical properties: chemical stability, acid and alkali resistance, good insulation	Packaging, containers, automotive parts, medical devices	＄

How to select materials for plastic injection molding projects？

Subtitle Description

The field of plastic injection molding is extensive, and even for experienced product developers, the selection of materials can be confusing.Therefore, we provide you with a concise and comprehensive material selection manual. Although the selection is not guaranteed to be foolproof, it can help you to filter out the right few from the many options

Hardness consideration

Hardness is an indispensable characteristic. Nylon performs well in applications where hardness is required. For extreme performance, thermoplastic polyurethane (TPU) is preferred, but be aware of the high cost of material and mold injection.

Flexibility requirements

Thermoplastic elastomers and polypropylene are examples of flexible materials. TPE performs better in terms of fatigue resistance and high temperature resistance, while PP is safer due to its recyclability.

Cost control

PP and PS have advantages in material cost, the price is close to the people and easy to purchase.

Temperature resistance evaluation

Nylon and ABS are stable at high temperatures, POM is excellent at low temperatures.

Customization and application

The final selection should be based on the product application. Ensure that the selected material can meet the needs of custom injection molds and micro-plastic injection molding, and become a useful choice for injection molding manufacturers.

Environmental protection needs

If you have certain needs in environmental protection, you can give priority to PA6, PMMA and PEEK

Which plastic is best for your injection molding project?

Subtitle Description

When facing injection molding projects, how to choose the right plastic material becomes the key. With the help of this guide, designers can make more precise choices.

Plastic auto parts

This type of part requires high hardness and heat resistance to cope with frequent use and the heat generated by the engine. ABS is an excellent starting point because it has these features and is affordable. In order to ensure the perfect product, it is essential to work with a professional injection molding supplier to customize the injection mold.

Power tools

Power tools face challenges of high force, vibration and frequent use, and can sometimes be damaged by overheating. When selecting materials, consider specific application scenarios. Nylon, PET, ABS, and even TPU are all reliable options. To ensure smooth processing, it is key to seek professional injection molding services and advice on injection molding plastic materials.

High-end footwear soles

Soft, flexible and unrip-resistant soles are a must for high-end footwear. At the same time, it must be lightweight, resistant to water and wear. TPU seems to be the ideal choice for this need, especially when you are looking for small batch injection molds and custom injection mold plastic parts.