General Plastic 

HDPE

Advantages: With good cold resistance, chemical stability. It’s not soluble any organic solvent in room temperature. Excellent resist to acid, alkali, salt chemical corrosion. The melting point is about 130 ℃.The maximum operating temperature is 78 ℃. Besides, it is with good toughness and stiffness also with dielectric properties.

Disadvantages:  The mechanical properties is not good, and easy to deformation, aging, brittle, stress cracking. And surface hardness is low, easy to scratch. It needs surface discharge treatment to printing. Not allowed plating.

PP

Advantages: With high impact resistance, tough mechanical properties, resist to a variety of organic solvents and acid corrosion. Highest heat resistance in the general thermoplastic. The melting point of 189 ℃. It can be long term use in 100℃.

Disadvantages: High brittleness in low temperature, not resistance aging .

PVC

Advantages:  With excellent mechanical properties, hardness, chemical resistance, and can withstand most of the inorganic acid, alkali, most organic solvents and inorganic salts. Good electrical insulation, easy printing and welding. And the plasticizer can adjust its soft and hardness, but the mechanical properties will be reduced with the plasticizer increases. PVC with flame retardant function,  Suitable working temperature is between 60-70 ℃.

Disadvantages: Thermal stability and impact resistance is poor, not resist aging and cold. The processing performance is not good.

ABS

Advantages:  With fine wear-resistant, oil resistance and good stability. Heat distortion temperature is 93-118 ℃, it can be used at -40-100 ℃.

Disadvantages: Poor weather resistance, easy decomposed under ultraviolet light. If stay half year in the outdoors, the impact strength decreased half. And mechanical properties are affected by temperature.

PS

Advantages:  High transparency, the light transmittance up to 90% or more, good electrical insulation, easy to color, good processing flow. PS is hard and brittle, its with highest tensile strength and bending strength in the general thermoplastic. Heat distortion temperature is about 80 ℃, Suitable working temperature is 60-80 ℃.

Disadvantages: Not suitable for outdoor use.

Engineering Plastic

PA

Advantages: Good wearing resistance, self-lubricating, mechanical properties, oil resistance, good gas barrier, and endurance. Suitable working temperature is 100℃

Disadvantages: Hygroscopicity, and not reisit acid and alkali. In the wet environment, the dimension is easy to change. 

PC

Advantages: With high impact-resistance, transparency, excellent mechanical properties, electrical insulation, high dimension stability, resist most organic acid and ozone.

Which is a plastic material combine solid, hard and tough together. The using temperature range -130-130 ℃. The most suitable working temperature is 110℃.

Disadvantages: Hygroscopicity, difficult process. Not resistant to alkali, low fatigue resistance, friction and wear resistance is not good.

POM

Advantages: Excellent mechanical properties and rigidity, which is the ideal material to replace metal.Good resistance to fatigue and creep resistance, wear resistance, self-lubricating and friction are good, and thermal stability and chemical stability is also good, excellent electrical insulation. Hot deformation temperature is 124 ℃, can be used at 120 ℃ for short-term use.

Disadvantages:  Not resist acid and cannot work for a long time in high temperature.  The shrinkage is large and unstable, poor dimensional stability, poor weather resistance, if working under ultraviolet light long time, the mechanical properties will decline, and the surface will be cracking.

POK

Excellent chemical and abrasion resistance. Abrasion is 14 times of POM . The heat distortion temperature is 200 °C. It has excellent barrier properties, impact strength and toughness for gases and hydrocarbons. It’s an ideal material instead of PA (nylon) or POM.

Special Engineering Plastic

PSF/PSU

PSF/SU with high heat resistance, which can be used at -100-150 ℃ for a long-term, mechanical properties, creep resistance and electrical properties are very good. Resistant to inorganic acids, alkali and salt. But not resistant to sulfuric acid and nitric acid. Excellent resistance to radiation, but weatherability and resistance to ultraviolet light is not good.

PEI

PEI with excellent mechanical and dielectric properties. It is with high heat resistance, heat distortion temperature up to 200 ℃, and at 170 ℃ can be long-term use, resistance chemical corrosion, ultraviolet radiation, good water stability, flame retardant. It’s easier to process than polyimide (PI).

PVDF

PVDF with the characteristics of fluorine plastic and general purpose resin, good resistance to chemical corrosion, high temperature, oxidation, weatherability, radiation resistance, but also has a piezoelectric, dielectric, thermoelectric, etc.. Its mechanical properties are the most superior in fluorine plastic. Which is can be long-term used in the -40-150 ℃.