Friction can turn medical products into failures

By Frank Esposito
Senior Staff Reporter

Published: June 4, 2014 4:37 pm ET
Updated: June 4, 2014 4:42 pm ET

Image By: Janet Century Ben Gerjets, left, and Josh Blackmore, both of RTP Co., speak about the importance of low friction plastics in medical devices.

Related to this story

Topics Medical, Materials, Plastics in Medical Devices
Companies & Associations RTP Co.

CLEVELAND — Researchers at RTP Co. are working to make sure friction doesn’t burn up users of single-use drug delivery devices.

The use of such devices — including syringes and injection pens — is becoming more widespread as patients are being taught how to administer their own medication, often at home. This, in turn, has put pressure on medical device makers to ensure that parts don’t exhibit stick/slip — basically, that they don’t get stuck — when being used.

“If the device doesn’t deliver the full amount of the drug, it’s a failure,” RTP global healthcare manager Josh Blackmore said May 6 at Plastics in Medical Devices, a conference hosted by Plastics News in Cleveland.

To find the best way to eliminate friction in these devices, researchers with Winona, Minn.-based RTP — which ranks among North America’s 30 largest compounders and concentrate makers — tested numerous resin pairings combined with several different lubricants.

Parts made of varying plastics — including polycarbonate, acetal, PBT, high density polyethylene, ABS and PC/ABS — were tested against each other after being filled with internal lubricants, according to product development engineer Ben Gerjets.

Lubricants used in the testing included fluorinated PFPE and RTP’s own APWA (all-polymeric wear alloy) Plus-brand lubricant. APWA Plus was commercialized earlier this year in acetal-based compounds.

RTP’s tests also measured how various plastic parts exposed to friction were affected by sterilization, UV degradation and shelf life. Parts also were exposed to 100 hours of wear over time.

“Dissimilar pairs [of resin] showed improved low friction,” Gerjets said. “But they performed best when dissimilar pairs were combined with internal lubricants.”

“Internal plastic lubrication improved stick/slip,” he added.


Comments

Friction can turn medical products into failures

By Frank Esposito
Senior Staff Reporter

Published: June 4, 2014 4:37 pm ET
Updated: June 4, 2014 4:42 pm ET

Post Your Comments


Back to story


More stories

Image

Oxford Polymers adds compounding capacity

January 30, 2015 1:16 pm ET

Materials maker Oxford Polymers has increased its compounding capacity by installing a new single-screw extrusion line.    More

Image

Marval's next generation expands capacity

January 30, 2015 1:27 pm ET

MAMARONECK, N.Y. — There’s a lot of history at Marval Industries Inc., but the 59-year-old compounding firm also is looking toward the...    More

Image

Lubrizol buys Brazil-based coatings technology manufacturer

January 30, 2015 11:50 am ET

Specialty chemicals company Lubrizol Corp. of Wickliffe, Ohio, said it has acquired a Brazilian company that makes coatings technology for products...    More

Image

2014 sees modest sales increase, but profit decrease, for Dow Chemical

January 29, 2015 4:20 pm ET

UPDATED — Dow Chemical Co. delivered modest sales growth in 2014, but the firm's profit took a tumble.    More

Image

Resin prices continuing to tumble

January 29, 2015 2:24 pm ET

The ongoing slide in crude oil prices is taking commodity resin prices down as well.    More

Market Reports

Plastics in Automotive: Innovation & Emerging Trends

This special report newly released by PN and sponsored by The Conair Group examines current trends in the use of plastics in automotive, materials innovations and the changing landscape. It includes a review of legislative/regulatory activity impacting vehicle development and lightweighting, market opportunities & challenges for mold and toolmakers, innovative design strategies being implemented by major OEMs and suppliers, as well as a review of key indicators in Canada, Mexico, Brazil and China.

Learn more

Plastics Recycling Trends in North America

This report is a review and analysis of the North American Plastics Recycling Industry, including key trends and statistics based on 2013 performance. We examine market environment factors, regulatory issues, industry challenges, key drivers and emerging trends in post-consumer and post-industrial recycling.

Learn more

Injection Molding Market Analysis & Processor Rankings

Plastics News BUNDLED package contains our in-depth Market Analysis of the Injection Molding segment. You will gain keen insight on current trends and our economic outlook.

As a BONUS this includes PN's updated 2014 database of North American Injection Molders RANKED by sales volume. Sort, merge, mail & prospect by end market, materials processed, region, # of plants and more.

Learn more

Upcoming Plastics News Events

February 4, 2015 - February 6, 2015Plastics News Executive Forum 2015

June 2, 2015 - June 3, 2015Plastics Financial Summit - Chicago 2015

September 16, 2015 - September 18, 2015Plastics Caps & Closures - September 2015

More Events