코오롱플라스틱(주)

Characteristics

우수한 내열성 우수한 기계적 물성 우수한 탄성 회복성 안정된 치수성 자체 난연성 우수한 내약품성, 내열수성, 저흡수성 우수한 전기적 특성 안정된 치수 특성

Molding Conditions

사출성형 조건표

Item		Unit	Set Point
Cylinder Temperature	Nozzle	℃	330
	Front Part	℃	320
	Middle Part	℃	310
	Back Part	℃	300
Molding Temperature		℃	120 ~ 150
Injection Pressure	1st Pressure	㎏/㎠	700 ~ 1200
	2nd Pressure	㎏/㎠	400 ~ 850
	Back Pressure	㎏/㎠	0 ~ 40
Drying Temperature and Time		2 ~ 4 hours at 120 ~150℃

The above table shows the standard conditions for moding of PPS,
and may vary according to the injection molding machine and shape of the molded product.

• Colling Time = Measuring Time + α

- The molding temperature has to be set slightly above the melting point of PPS (280℃), but use it below 330℃ to suppress the gas occurrence

- The molding speed is generally set fast when the thin molding, many cavities and dimensional precision are required.

- In case of the bubble problem of thick resin, set the speed slowly. Cooling time should be set with the limit which transformation or ejector pin mark does not occur when applying ejector pin.

Drying and regrind material

Drying Method
KOPPS^® has moisture absortion rate and thus can be used straight from the bag. However, in case of the list below, we recommend drying
before use.
- Appearance is important
- Demensional precision is required

Use of Regrind Material
- 100% regrind KOPPS^® shows no change in properties even after being recycled 5 times.(Other than pyrolysis or mixing foreign substance)
- The more recycling is done, the less its hardness tend to become dust mixing from the grinding process should be considered.
- The limit of mixing proportion is determined according the change of the color and it is generally recommended to mix the regrind product up to 20%

<Cautions for handling>
Regarding cautions for handling KOPPS^®, please refer to MSDS which is provided by KOLON PLASTICS.