A Borealis A/S polypropylene can reduce cycle time and part weight when blended as a process aid with other PP resins, according to the company.
Borealis of Lyngby, Denmark, said its Daploy WB130HMS is a high-melt-strength, homopolymer PP.
Blends containing 10-20 percent of the material allow processors to tailor properties of copolymer or homopolymer PP resins with a range of molecular weights and other properties, depending on the end-use requirement.
The Daploy polymer acts as a nucleating agent for the main PP resin, according to Borealis.
Transmit Technology Group LLC of Arlington, Texas, performed tests for Borealis that showed the Daploy grade improved properties and processing economics.
In one example, a large part made by structural foam molding contained 10 percent of the Daploy resin in a PP homopolymer.
Cycle time was reduced from 102 seconds to 80 seconds and part weight dropped from 21 pounds to 19.8 pounds. Surface defects such as dimples and flow marks were absent, according to Borealis.
Tel. +45 4596-6000, fax +45 4596-6123.