코오롱플라스틱(주)

Product

KOLON PLASTICS provides the best product
fit in to customer’s satisfaction with diverse portfolios.

KOCETAL®-POM

KOCETAL® refers to polyacetal resin of a copolymer type, and is a material of an excellent quality with features of excellent anti-friction/anti-wear, chemical-resistance, heat-resisting stability, precise dimensions and molding abilities. It is mainly applied in gear or roller, and is used for various purposes over the fields of cars, office equipment and living materials.

Catalog
KOCETAL®-POM
Production of Low-VOCs POM of the World-Best Quality

Following POM (Brand name: KOCETAL®) products that are made by our independent technology development, KOLON PLASTICS has developed low-VOCs(volatile organic chemicals) POM resin of the world-best quality with almost no emission during the process of formaldehyde that is harmful to human body for the first time in Korea.

The low-VOCsPOM of KOLON PLASTICS has less than 0.5ppm formaldehyde emission, which is almost 1/20 of normal POM (around 10ppm) and about 1/10 maximum of that of the low VOCs of the competitors, and is being evaluated as the world-best standard environment-friendly material.

The low-VOCs POM that KOLON PLASTICS is supplying has passed strict environment regulations of Europe, North America and Japan, and especially, the material has notably less emission of formaldehyde even when it is re-used, thus it is very environment-friendly.

저 VOCs POM 포름알데하이드 함량 비교 / 저 VOCs POM Recycle시 포름알데하이드 함량 비교
Properties of KOCETAL®-POM

기계적 성질, 열적 성질, 내화학성, 내후성

Mechanical property The resin is highly crystalline, and has a great combination of toughness and rigidity. It is also resistant to fatigue, creep, and to abrasion thanks to its property of self-lubrication.

Thermal property Heat deflection temperature under load and deterioration are other properties to be considered with polymer. Amorphous resin deflects over the heat deflection temperature, but polyacetal that is crystalline, doesn't deflect a lot even over the heat deflection temperature. Thus, the limit of temperature should be considered after calculating the amount of creep deflection, depending on the design requirement.

The estimated life of resin can be extrapolated by measuring the change of property by temperature and using Arrhenius Plot. Because thermal stability of acetal copolymer resin can be improved by addition of stablilizer, each grade shows different thermal stability. Homopolymer is more easily deteriorated than copolymer.

Chemical resistance The chemical resistance of a resin can be judged by examining the solubility to chemicals, the increase of weight through absorption, and the influence of chemicals on creep fracture.

Polyacetal isn't penetrated by organic solvents due to its crystalline property, but gains its weight slightly to aromatic, chlorine, ketonic, and ester solvents, which can change its mechanical property and size. Exceptionally, hexafluoroacetone dissolves polyacetal. Polyacetal is resistant to gasoline and lubricant, but if acid additive is used to improve the performance, it may become less resistant. Copolymer is resistant to alkali, but homopolymer is not resistant to alkali chemicals. Polyacetal is generally resistant to inorganic chemicals, but can be penetrated by ZnCL2 depending on temperature and concentration.

The life of resin should be decided by considering the concentration of chemicals and temperature. In case of resistance to hot water, if used for one year, the limit of temperature for copolymer is 90℃, and is 65℃ if used for ten years. Due to its chemical structure, homopolymer has fairly shorter life than copolymer.

Weatherability Polyacetal resin is not resistant to ultraviolet, but can be improved by adding light stabilizer and ultraviolet absorber. The resistance to ultraviolet can be enhanced by staining carbon black and using proper pigment. However, in case of exterior use, the resin can be deteriorated by ultraviolet and influenced by SOx, NOx, ozone, etc. Therefore, serious consideration is needed for weatherability.

The accelerated weather resistance test is carried out by using Weather-O-Meter, Xenon arc, and Fade-O-Meter. Good result doesn't guarantee any crack or discoloration caused by exterior conditions.

Homopolymer & Copolymer

Homopolymer and copolymer are slightly different in terms of their physical nature, and the company is producing POM of copolymer type. Copolymer is excellent in terms of heat stability especially in high temperature and also has great alkali-existence and elasticity compared to homopolymer. Also, it has excellent heat-stability for molding process and a wide range of molding temperature, therefore advantageous in molding process to suit the desired purpose.

Homopolymer & Copolymer
Property Unit Homopolymer Copolymer
Specific Gravity - 1.42 1.41
Specific Gravity Kgf/㎠ 700 630
Tensile elongation % 30 60
Flexural strength Kgf/㎠ 980 910
Flexural modulus Kgf/㎠ 28800 26400
Impact strength
Notched lzod
Kgf . ㎝/㎝ 7.5 6.5
Rockwell hardness M scale 94 80
Application

Application DC Motor Gear Door Latch Housing Fuel Pump Plate Seat Belt D-ring Speaker Grill Window Regulator C_Plate Window Regulator Motor Gear Conveyor Roller Washing Machine Drain Valve Parts of Machines ROD Sheet Conveyor Belt Segment Pack