• PT Youtube
  • PT Facebook
  • PT Linkedin
  • PT Twitter
4/1/2009

Thermoforming Heat-Resistant PLA Trays

Facebook Share Icon LinkedIn Share Icon Twitter Share Icon Share by EMail icon Print Icon

A technique for crystallizing polylactide (PLA) biopolymer trays to make them more heat resistant was disclosed in a recent patent application by NatureWorks LLC, Minnetonka, Minn.

Related Suppliers

A technique for crystallizing polylactide (PLA) biopolymer trays to make them more heat resistant was disclosed in a recent patent application by NatureWorks LLC, Minnetonka, Minn. U.S. Pat. Applic. 20080258357 describes heating a sheet of amorphous PLA at 80 to 155 C to develop a critical level of crystallinity, and then forming the sheet on a mold heated to less than the Tg or the crystallization temperature of PLA. The target crystallinity of 15 to 24 J/g is achieved by a combination of resin, nucleating agent, sheet temperature, and oven dwell time. The principle is similar to forming CPET, but doesn’t require a hot mold or longer cycles. The CPLA process can also be used to form PLA foam sheet. The process has been demonstrated on full-scale forming lines using NatureWorks’ Ingeo PLA. (952) 742-0400 • www.natureworksllc.com

NatureWorks LLC
15305 Minnetonka Blvd Minnetonka, MN 55345
Phone (952) 742-0523 Fax (952) 742-0477 

Hand holding a crystal ball

We’d rather send you $15 than rely on our crystal ball…

It’s Capital Spending Survey season and the manufacturing industry is counting on you to participate! Odds are that you received our 5-minute Plastics survey from Plastics Technology in your mail or email. Fill it out and we’ll email you $15 to exchange for your choice of gift card or charitable donation. Are you in the U.S. and not sure you received the survey? Contact us to access it.

Help us inform the industry and everybody benefits.

RELATED CONTENT

Resources