Overview of the qualities of plastic

4-1.Thermosetting plastic

PF-Phenol resin

Phenol resin by invented by L.H. Baekland (US) in 1909, and it is the plastic with longest history. It has good thermal resistance, durability and excellent electric insulation.

UF-Urea resin

Urea resin is used in oil-based felt pen cap as it can be easily colored, has high surface hardness, and it is insoluble in organic solvents. Moreover, since it has excellent tracking resistance and flame resistance, it is also used in wiring tools that requires very high electrical safety.

MF-Melamine resin

Melamine resin is used in food containers as it can be easily colored, has high surface hardness, and it has excellent water resistance. Moreover, since it has excellent tracking resistance, heat resistance and flame resistance, it is also used in housing of switch that requires very high electrical safety.

UP-Unsaturated polyester resin

Transparent and hardened unsaturated polyester resins can be obtained at normal temperatures, and they are used in paints, cast molding and buttons. Moreover, glass fiber reinforced plastic (FRP) obtained by combining it with reinforcing material such as glass, is widely used in corrugated sheets, boats, bath tubs, septic tanks, automobile parts, electrical parts, helmets, mannequin as well as various sporting goods.

EP-Epoxy Resin

Epoxy resin refers a chemical substance having 2 or more epoxy groups in one molecule. Various cured resins can be obtained by combining curative agents and bulking agents, and then heating them or keeping them at normal temperature. As far as their main applications are concerned, in addition to paints and adhesive agents, they are widely used from daily use materials to advanced materials such as structural material for air crafts and encapsulation resins of semiconductors.

4-2.Thermo-plastics

PE-Polyethylene

PE(polyethylene) is one of the main crystalline general-purpose plastics. It exhibits balanced mechanical properties and excellent molding properties, and it is used in wide range of fields. It is milky white opaque or translucent, and it is classified in High Density Polyethylene (HDPE) and Low Density Polyethylene (LDPE).

PE-Polyethylene

PP (polypropylene) is a leading crystalline general purpose plastic. With the specific gravity of 0.9, it is lightest among all general purpose plastics. Moreover, due to its excellent chemical resistance, hydrolysis resistance and electrical properties, it is used in wide range of fields as a plastic with large range of applications. It is frequently used as a replacement material for PVC (poly-vinyl chloride), which has recently come under scanner due to dioxin generation.

PVC-Polyvinyl Chloride

Due to its excellent water, acid, alkali and solvent resistance, it is used in water distributing pipes. Due to its inferior heat resistance, it generates hazardous substances like chlorine gas upon combustion.

PA-Polyamide (Nylon)

PA6 (polyamide6=Nylon 6) is a crystalline engineering plastic. It is a strong material with small coefficient of friction. Despite of that, it has excellent resistance to abrasion and self extinguishing properties. Since it is also oil resistant and chemical resistant, it is suitable for machine material. However, one drawback is that its high hygroscopic properties must be considered during design.
PA66 (polyamide66=Nylon 66) is a crystalline engineering plastic. It is a strong material with small coefficient of friction. Despite of that, it has excellent resistance to abrasion and self extinguishing properties. Since it is also oil resistant and chemical resistant, it is suitable for machine material. However, one drawback is that its high hygroscopic properties must be considered during design.

PC-Polycarbonate

PC (polycarbonate) is a non-crystalline engineering plastic. It has excellent impact resistance and balanced mechanical properties and electrical properties. Moreover, because it is transparent and self extinguishing, it is used in wide range of fields such as electrical and electronic area, automobiles and medical.

POM-Polyacetal

POM (polyacetal) is a crystalline engineering plastic. It has balanced mechanical properties and excellent fatigue resistance, creep resistance, friction and abrasion resistance and chemical resistance. Therefore, it is widely used in fields like electrical machineries, automobiles, machineries and construction in place of metals.

RENY-RENY (Glass-fiber-reinforced polyamide MXD6)

RENY is a crystalline engineering plastic re-inforced with 50% glass fiber with polyamide MXD6 as the base polymer. Among all plastics, it has the highest strength and coefficient of elasticity. Moreover, due to its excellent oil resistance and heat resistance, it is used in transportation machinery parts such as automobiles, general machinery, precision machinery parts, electrical and electronic equipments parts and civil engineering and construction material in place of metals.

PPS-PPS (polyphenylene sulfide)

PPS (polyphenylene sulfide) is a crystalline super engineering plastic. It has excellent thermal resistance, and its properties hardly deteriorate even when using for long time under high temperature environment. Moreover, it has excellent chemical resistance, mechanical properties, electrical properties, and dimensional stability, and it is widely used in electrical and electronic parts, automobiles parts, chemical machinery parts etc.

PEEK*-Polyether ether ketone

PEEK® (Polyether ether ketone) is a semicrystalline super engineering plastic with the highest level of performance. Concentrated sulfuric acid is the only general purpose chemical in which PEEK can be dissolved. Moreover, it has excellent heat resistance, abrasion resistance, flame resistance and hydrolysis resistance, and it is used in various fields like OA equipments, automobiles, IC wafer carrier and LCD manufacturing jigs.
*PEEKは、Victrex plc.の日本における登録商標です。