is part of the Informa Markets Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them. Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Low-gloss PVC compounds for automotive window encapsulation closely match surface finish of nearby EPDM components

Article-Low-gloss PVC compounds for automotive window encapsulation closely match surface finish of nearby EPDM components

Low-gloss PVC compounds for automotive window encapsulation closely match surface finish of nearby EPDM components
OEM-approved Apex 1523-LG compounds from Teknor Apex retain PVC cost advantage over elastomers, are scratch- and mar-resistant, and facilitate precise color matching.

A newly developed series of flexible PVC injection molding compounds that have been used successfully in automotive window encapsulation reportedly exhibit substantially lower levels of surface gloss, providing a rubberlike finish that matches that of adjacent EPDM components while retaining the cost-performance advantages of PVC. Teknor Apex Company will introduce the enhanced formulations at NPE 2018 (Booth S22045).

PVC compound closely matches EPDM appearance in terms of gloss, rubberlike finish.

The newly enhanced Apex 1523-LG Series exhibits gloss levels similar to those of EPDM rubber beltline seals or glass run channels, enabling manufacturers of PVC-encapsulated windows to meet OEM demand for a closer match in the surface finish of these critical appearance parts. The lowest gloss levels of standard PVC compounds for window encapsulation are in the 9 to 12 range as defined by SPI gloss finish standards, and they are achieved through etching or sandblasting of the tooling surface. In contrast, Apex 1523-LG Series compounds achieve a gloss level in the 3 to 4 range without need for surface treatment of the tooling. This eliminates the costs associated with the tooling maintenance and repair required to keep a consistent surface appearance from part to part. 

Apex 1523-LG Series compounds have received several OEM material approvals, including the GMW-16084 specification for quarter windows from General Motors and the MSDC543 specification for quarter windows and sunroofs from Chrysler. Teknor Apex can manufacture these compounds in the U.S., Europe, and China.

“Our introduction of low-gloss compounds is particularly important since PVC is the dominant material for window encapsulation and is valued by manufacturers for its advantages over elastomers,” said Steve McCormack, industry manager of the Teknor Apex Automotive Group. “Like standard PVC, new Apex 1523-LG Series formulations are relatively low in cost, provide better scratch and mar resistance, excellent bonding to glass, and superior colorability. Teknor Apex says it can match to any color and supply uniform product no matter how many places in the world a customer carries out manufacturing.

Hide comments


  • Allowed HTML tags: <em> <strong> <blockquote> <br> <p>

Plain text

  • No HTML tags allowed.
  • Web page addresses and e-mail addresses turn into links automatically.
  • Lines and paragraphs break automatically.
The Plastics Industry Is Under Attack

Environmental concerns about plastics are valid, but politicians and corporations often cow to activists without considering that they can be a sustainable choice in many applications.

We're tracking the industry's fight to ensure common sense prevails.