Polyvel peroxide concentrates offer several product improvements, but the use of Polyvel peroxide concentrates also allows for reduced material use and increased flexibility in resin selection — both factors leading to raw material cost savings.

Following are the Polyvel peroxide concentrates manufactured specifically for use in the fiber market using fiber grade polypropylene.

Pellet	CR5F, CR10PX, CR20PX
Granular	CR5XG, CR10XG, CR20PXG

Polyvel pelletized peroxide concentrates feed uniformly through additive feeders allowing for consistent, uniform addition of the peroxide concentrate into the process. The granular form of concentrate has been developed and is specifically recommended for use with granular or powdered polypropylene. The granular form peroxide concentrates blend easily and uniformly with the granular or powdered polypropylene resin during low sheer mixing processes, developing a uniform distribution of the peroxide concentrate.

The granular versions of each of these concentrates performs similar to the pelletized concentrates. Polyvel granular peroxide concentrates are recommended only when direct blending with granule or powdered polypropylene resins is required.

The dramatic melt flow rate increase that is achievable when Polyvel CR20PX is added to the polypropylene makes it possible for the fiber being produced to be manufactured thinner. As a result of thinner fibers, the space between the fibers is decreased. This decrease in space between the fibers results in the improved absorption, filtration and insulation properties of the material.

	Pellet
	CR5F	CR10PX	CR20PX
Physical Form	Off White	Off White	Off White
Melt Index*	35	400	400
TGA Weight Loss**	<1.5%	<1.5%	<1.5% C
Active Level	5%	10%	20%
Type of Peroxide***	1	2	2
	Granular
	CR5XG	CR10XG	CR20PXG
Physical Form	Off White	Off White	Off White
Melt Index*	400	400	400
TGA Weight Loss**	<1.5%	<1.5%	<1.5% C
Active Level	5%	10%	20%
Type of Peroxide***	1	1	2

*gm/10 min. (Condition L)
**At 300° C, in air
*** Peroxide types:
1. 2, 5 Dimethyl - 2, 5 - di (t-butylperoxy) hexane
2. 1, 3 bis (tert butylperoxy - isopropyl ) - Benzene