Antioxidant, UV Absorber, OBAs and Pigment For PB & PEX

PB is an abbreviation of Polybutylene which is a polyolefin or saturated polymer with the chemical formula (C4H8). It is mainly used in pressure piping, flexible packaging, water heaters, compounding and hot melt adhesives.

PEX is an abbreviation of Cross-linked polyethylene. PEX is mainly used in building services pipework systems, hydronic radiant heating and cooling systems, domestic water piping, and insulation for high tension (high voltage) electrical cables.

Antioxidant And UV Absorber and HALS For PB & PEX

Optical Brightener For PB & PEX of Polyolefin

Pigment for PB and PEX (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 and 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.