PMMA (Polymethyl Methacrylate, Acrylic)

In the 1930s, PMMA was developed as a kind of paint. Injection-molded PMMA appeared in 1937. The favorite variety is plexiglass, a safe replacement of traditional glasses. PMMA is endurable and transparent. It is the best choice for products requiring a long lifespan. PMMA burns slowly, without fog or gas.

PMMA is often used in lighting and optical transmission products, such as car taillights, display screens, and windows.


PEEK (Polyether Ether Ketone)

PEEK is considered as an “organic polymer” resistant to thermal breakdown. It is stable in mechanical and chemical properties.

PEEK is also “an advanced biological material” popular in the pharmaceutical fields. The typical application is the body implant. The high performance of PEEK also makes it applicable in aerospace, vehicles, and chemical diagnostic industry.

PEI (Poly-etherimide, Ultem)

Polyetherimide is developed by GE in 1982. Ultem is the commercial name. Compared with PEEK, PEI is cheaper and semi-transparent (amber). The strength and heat resistance of PEI is lower than that of PEEK. The continuous work temperature of PEI is only 170℃.

PEI is typically used in medical, vehicle, electrical, and aerospace industries. Although PEI is not yet an optical grade material, its good light transmittance makes it widely used in the telecommunications industry, such as fiber optic connectors. In addition, PEI’s low thermal expansion coefficient makes it the best resin for applications requiring tightly controlled tolerances.


LCP (Liquid Crystal Polymer)

LCP is a relatively new variety among all plastics. Although the research its composition started in 1888, injection-molded LCP didn’t come into the market until 1980, almost 100 years later.

LCP is a unique engineering thermoplastic, whose molecule chain is highly structured. It is quite sturdy and quite expensive. It has good thermal deformation properties and good fluidity during injection molding. Therefore, LCP is a good choice for thin-walled structures (e.g. 0.2 mm).

LCP keeps excellent mechanical strength at extreme temperatures. It is resistant to almost all kinds of damages caused by chemicals, radiations, and combustions. It is a replaceable material of ceramic, metal, and other plastics.

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