Antioxidant, UV Absorber, Optical Brightener And Pigment For Polypropylene

PP is an abbreviation of polypropylene is a thermoplastic polymer used in a wide variety of applications including packaging and labeling, textiles, etc.

PP Processing temperature of PP is 200-300℃.

 

Antioxidant, UV Absorber and Light Stabilizer For PP

Processing TemperatureAntioxidantUV Absorber

light stabilizer

Remark
PP thick section260-280℃

Outdoor table&chair

1010+DSTDP622+326DSTDP=3*1010
PP thin section

Fiber & strip

240-300℃PP fiber:1425

1010+168/DSTDP

 

Fiber:

770 without heat

622 with heat

Strip:791

Low volatile

Heat stability

Extraction resistance

Gas yellowing

 

Optical Brightener For PP of Polyolefin

ApplicationOBAs Adding FormTypical OBAsIssue to mind
PolyolefinDry powder mixFP 127

KSN

Compatibility

PP>hdpe>ldpe

Immigration resistance

 

Pigment for PP (please click on title)

 

Things to know when selecting pigments for polyolefins

1. Distortion & Shrinkage 

A number of organic pigments cause distortion in certain types of polyolefins, especially in HDPE. These pigments also enhance the shrinkage of polyolefins, particularly in the direction of the flow.

2. Dispersibility 

The dispersibility of an organic pigment which is to be incorporated in a polyolefin is of particular importance. This is especially true for the coloration of extrusion films and for HDPE or PP ribbon made from stretched blown film or from sheeted extrusion film, as well as for the coating or melt spin dyeing. Powder form pigment dispersion is not adequate in these applications. Poor dispersion causes filler specks, holes in films, and other faults. Pigment preparations, usually in combination with polyolefins as a carrier, are frequently used to color polyolefins.

Pigment powders continue to be used in thick-walled articles, such as extruded sheets, or hollow objects, or in injection-molded products; although color concentrates are beginning to be more important even in these areas.

Pigment/polyolefin paste preparations containing between 20 and 70% pigment are also used. They are manufactured by means of three-roll mills, agitated ball mills, or dissolves or similar equipment. Such preparations are employed primarily to produce bottles, injection-molded articles, or extrusion sheets. These preparations have the advantage of being applicable in volumetric doses and may be premixed in slow mixers or gravitation mixers to uniformly adhere to the plastic granulate.