Material Comparison Guide

Research materials to see which options best fit your needs.

Our experienced sales and technical teams are available to assist you with material selection challenges.

Plastic Injection molding PEI

What is Material PEI?

PEI is an amorphous polymer that ranges from amber to transparent. It has excellent electrical insulation properties and a good strength-to-weight ratio, making it a popular replacement for metal. It also has excellent mechanical properties and superior rigidity compared to Delrin or nylon. It is also biocompatible, making it suitable for medical applications.

PEI is used in the manufacturing of reusable medical devices and sterilization trays. It has high tensile strength and is very rigid, so it can withstand high temperatures without reinforcement. PEI is also used in electrical applications because it has excellent electrical and thermal properties. And it is flame resistant, which is important for many applications.

In addition to its good mechanical properties, PEI is also resistant to chemicals. Its polyimide-based polymeric structure allows it to resist many fluids, including aliphatic hydrocarbons, alcohols, acids, and weak aqueous solutions. PEI is also a low-cost alternative to PEEK, and it is increasingly being used in 3D printing.

PROPERTIES TABLE OF PEI

The table data is for reference only, if the plastic type is different and it has different data.

Injection Molding Material Selection

The process of plastic material selection is an integral part of the product design process. By choosing the right material for your application, you can be confident that the product will meet your expectations for quality, cost, and performance. Furthermore, you will save time and money on manufacturing because you will not have to scrap any parts.

We can offer more than 100 different thermoplastic materials. If you are looking for alternative materials, please review our resin substitution guide for ABS, PC, PP，POM,PA,PBT,PPS and other common plastics, or contact us.

Material

PET
HDPE
PC/ABS
PC/PBT
PVC
AS
PA12
MDPE

LDPE
PEI
PMMA
PPE
EVA
PC/PMMA
PA66
POM

Our PEI Product Cases

How Does Plastic Injection Molding Work?

Plastic injection molding is a process in which plastic pellets are formed and injected into molds to form the desired shape. The plastic melts in a chamber and reaches a specified temperature, so the injection time has to be calculated correctly. Once the desired shape is achieved, the plastic pellets are cooled, and the mold is opened. An ejection bar is then used to force the solid plastic part out of the open cavity.