TPEs Exhibit Greater Low-Temperature Toughness Than PVC and Provide Up to 30% Weight Savings in Medical Bags and Pouches

January 19, 2018

Medalist® Compounds Developed by Teknor Apex for Cold-Storage Applications Meet Stringent Regulatory Requirements and Open Possibility of Down-Gauging Film 

PAWTUCKET, RI, U.S.A., January 19, 2018: Medical-grade thermoplastic elastomers (TPEs) developed for cold-storage bags and pouches exhibit low-temperature toughness superior to that of PVC, weigh less at comparable film gauges, and open the possibility of running thinner products without sacrificing performance. Teknor Apex Company will introduce the compounds at MD&M West (Booth 2014).

Medalist® compounds for low-temperature film are 70% as dense as PVC, with a typical specific gravity of 0.90. At the same time they exhibit greater toughness in cold-storage applications, with brittle points as low as -60 °C, as against -40 °C for PVC. This greater toughness introduces the possibility of down-gauging from standard thicknesses or replacing multi-layer structures with monolayer films. The new Medalist compounds exhibit tensile and tear strength properties comparable to those of PVC and better moisture barrier.

“Our new TPEs for cold-storage bags and pouches combine the inherent low-temperature toughness of elastomers with the biocompatibility, processability, and cost-performance balance characteristic of all Medalist medical compounds,” said Ross van Royen, senior market manager of regulated products. “They enable medical manufacturers to achieve weight savings and other economies while still providing the same product performance as standard PVC.”

Teknor Apex produces Medalist compounds in ISO-13485 facilities in the USA and Singapore. The new materials are made with FDA listed ingredients, are certified to ISO 10993-5 standards for biocompatibility, and are REACH SVHC compliant. They are free of DEHP and other phthalates, BPA, and latex. Standard grades are ADM-free.

Properties and Units ASTM Test Method MD-53253 MD-13240 MD-13240B MD-10353
Color --- Clear Translucent Translucent Clear
Specific gravity D792 0.89 0.90 0.91 0.89
Hardness, Shore A (5 sec. del.) D2240 53 40 40 53
Compression set (73 °F, 22hrs), % D395 9 13 12 19
Brittle point. °C D746 -49 <-60 <-60 <-60
100% modulus, psi / MPa D412 270 / 1.86 230 / 1.58 170 / 1.17 310 / 2.14
300% modulus, psi / MPa D412 415 / 2.86 550 / 3.79 490 / 3.38 452 / 312
Tensile strength, psi / MPa D412 1340 / 9.24 1480 / 10.20 1170 / 8.067 1650 / 11.38
Elongation, % D412 890 630 560 890
Tear strength, lbf/in / nm D624 177 / 20.0 215 / 24.3 200 / 22.6 221 / 25.5