High Strength Plastic Injection Molding

FCE is an expert in providing customers with high-precision and high-strength injection molded plastic parts. It has rich experience in precision injection molding and molds. With its superb technical level, we can provide injection molding services for high-strength plastic parts and meet the standards recognized by all industries. As a company certified by ISO9001 and IATF 16949, we know the characteristics of various high-strength plastic materials very well, We will provide professional and complete solutions and one-stop services for your injection molding projects

Injection molding with High strength plastic

High strength plastic materials have the strength, toughness and durability unmatched by ordinary injection molding plastics. Considering the development trend of lightweight products and replacing steel with plastics, they are more and more preferred by product developers, and are usually special materials for a wide range of injection products used in communications, national defense, aerospace and medical applications.

Specialty  injection molding materials

Most high-strength injection molded plastics must be processed at very high temperatures (as shown in the figure). Moreover, because of these high temperatures, advanced molding equipment, more complex mold and tool design capabilities are required. FCE just has this ability, which enables us to fully control the quality, reliability and performance of molds and tools. This helps us to maintain the strict tolerances required by your design and ensure the accuracy of your custom injection molded products.

Classification of thermoplastics

Classification of thermoplastics

Properties and applications of commonly used high-strength plastic materials:

Material grade Material characteristics and application
PA46 PA46 is an aliphatic polyamide polycondensated from butylene diamine and adipic acid. Compared with PA6 and PA66, PA46 has more amides on each chain with a given length and more symmetrical chain structure, which makes its crystallinity as high as 70% and gives it a very fast crystallization rate. The melting point of PA46 is 295 ℃, and the HDT (thermal deformation temperature) of unreinforced PA46 is 160 ℃. After glass fiber reinforcement, its HDT can reach 290 ℃, and the long-term use temperature is 163 ℃. The unique structure of PA46 endows other materials with unique properties that cannot be achieved; PA46 is mainly used in electronics, aerospace and automobile.
PPA PPA is polycondensated from dibasic acid containing benzene ring and aliphatic diamine. Its melting point is between 310-325 ℃, and its hot deformation temperature is between 280-290 ℃. The main varieties are PA4T, PA6T, PA9T, PA10T, etc. Compared with ordinary PA66, the water absorption rate of PPA is very low. Even if it is immersed in cold water for several years, its tensile strength can remain more than 80%, and the oil resistance of PPA is very good. Even at high temperatures, PPA is also highly resistant to lubricating oil and fuel oil. PPA also has excellent dimensional stability and weather resistance. It is commonly used in the fields of automobiles, electrical appliances, electronics, machinery industry and daily necessities.
PPS Polyphenylene sulfide (PPS) is a special engineering plastic with the fastest development and largest consumption in recent years. It is widely used in automobile, electronic and electrical industry, machinery industry, petrochemical industry, pharmaceutical industry, light industry, military industry, aerospace, 5G communication and other fields. It is the most widely used special engineering plastics.
1. High performance: Modified PPS plastic is one of the best varieties of engineering plastics with high temperature resistance, and its thermal deformation temperature is generally above 260 ℃. In addition, it also has the advantages of small molding shrinkage, low water absorption, excellent fire resistance, chemical resistance, weather resistance, electrical performance, good dimensional stability, anti vibration fatigue, strong arc resistance, especially in high temperature and high humidity environments, it still has excellent electrical insulation, so it can replace metal as engineering materials in many application fields.
2. Light product weight: the proportion of ordinary pps plastic is about 1.34~2.0, which is only 1/9~1/4 of steel and 1/2 of aluminum. This feature of pps is particularly important for vehicles, ships, aircraft and other mechanical equipment that need to reduce weight.
3. High strength: For materials of the same volume, the strength of pps is generally lower than that of metals, but because pps is much lighter than metals, when compared with metals of the same weight, pps is much stronger than ordinary metals, and its strength is the highest among existing structural materials.
4. Convenient processing: pps products are often molded at one time, while metal products generally need to go through several, more than ten, or even dozens of processes to complete.
PEEK Poly ether ether ketone (PEEK), as a new semi crystalline aromatic plastic engineering plastic, has extremely excellent physical and mechanical properties. It can replace traditional materials such as metals and ceramics in many special fields. It has made outstanding contributions to reducing mass and improving performance. It is one of the hottest high-performance engineering plastics today.
Features: high temperature resistance, good biocompatibility, excellent mechanical properties, good dimensional stability, good self-lubricating property, sliding wear resistance and fretting wear resistance, excellent flame retardancy, strong self extinguishing property, chemical stability, good processing and molding, and easy for secondary processing.
Electronic and electrical Today’s electronic components have higher requirements for product performance, portability, wireless/high-frequency and life. Due to its advantages such as high temperature resistance, excellent mechanical processing stability, flame retardancy, low smoke, corrosion resistance, and excellent electrical performance, PEEK is often preferred in some applications in the electronic and electrical field with high requirements. At present, it is mainly applied to polymer parts of wires and circuit breakers, batteries, capacitors, connectors, sockets and touch screen parts.
PEI PEI has excellent mechanical properties, electrical insulation properties, radiation resistance, high temperature resistance and wear resistance. It has good melt fluidity and molding shrinkage of 0.5%~0.7%. It can be used for injection molding and extrusion molding. It is easy to post-processing. It can also be combined with other materials by welding. It is widely used in electronics, aviation, automobile, medical equipment and other industries.
PSU PSU is a slightly amber, amorphous, transparent or translucent polymer. Its outstanding advantages are excellent mechanical properties, high rigidity, wear resistance, and high strength. It can maintain excellent mechanical properties even at high temperatures; The temperature resistance range is – 100~150 ℃, the long-term use temperature is 180 ℃, and the short-term use temperature is 220 ℃. It has good dimensional stability, electrical insulation, chemical resistance and hydrolysis resistance. It is mainly used in automotive, electronic and electrical, household (food contact) and other fields, especially some transparent parts, and is a good alternative to metal, glass and ceramics. Polysulfone includes ordinary bisphenol A PSU (commonly known as PSU), polyphenyl sulfone (PPSU) and polyether sulfone (PES).
PAR Polyaryl ester (PAR) is a thermoplastic resin with benzene ring and ester bond on the main chain.PAR has good light transmittance (nearly 90%), toughness, heat resistance, elastic recovery, weather resistance and flame retardancy, and the maximum continuous use temperature is 170 ℃. It is mainly used for precision devices, automobiles, medical treatment, food and daily necessities.
LCP Liquid Crystal Polymer (LCP) is a kind of polymer which is composed of rigid molecular chains. Under certain conditions, it can have both liquid fluidity and crystal anisotropy (liquid crystal state).
The mechanical properties of LCP are excellent. The biggest feature is that the relative strength increases with the thinning of the wall thickness. LCP has good thermal performance, and the continuous use temperature can reach 200 ℃ – 300 ℃.
LCP has very small dielectric constant and dielectric loss, so it is used in electronic devices, such as connectors, slots, switches, brackets and sensors. The application of 5G antenna in mobile phone is the most widely studied.

For more information about Injection molding with High strength plastic,  please contact us! We will give you strong professional support.

Backplane socket with LCP plastic material

PEI plastic material

PEI plastic material parts

PPS plastic material

socket with PPS plastic material