Products: Ejection Material – Dura-Strip

Dura Strip

Dura-Strip is a micro-cellular elastomer that was originally designed for the most demanding automotive and truck applications. The same characteristics that make Dura-Strip suitable for these heavy duty applications make it an excellent die ejection material. The benefits of Dura-Strip are:

Highly Stable
Stands Up to Heat

It is Dura-Strip’s low transverse expansion feature that makes it suitable for slot and punch ejection. Figure A shows how normal closed cellular rubber expands laterally under pressure. Given the same pressure, Dura-Strip will behave more like a spring. By reducing the lateral expansion, Dura-Strip will reduce rule cracks in the slot which cause scrap to build up.

Dura-Strip is available for slots, as trim breaker rubber, and for punch ejectors. It is a proven product that has been successfully used in both rotary and flat dies to solve many of the problems associated with conventional closed cell rubber.

Also available:
■ Large Sizes
■ Metric Sizes
■ Punch Ejectors

Dura-Strip is a photo-sensitive product that gradually turns from almost white to rust colored. Though the appearance changes substantially over time, no other physical properties change. Dura-Strip does not shrink or get harder as it ages despite the color change.

Full Sheet Size
4.9” (125 mm) x 9.8” (280 mm)

Thickness                 Sheets per Box
1/8” (3.18 mm)          16
3/16” (4.76 mm)        12
1/4” (6.35 mm)          10
5/16” (7.94 mm)         6
3/8” (9.53 mm)           6
7/16” (11.11 mm)        5
1/2” (12.70 mm)         4
9/16” (14.29 mm)       4

Strip Sizes
Scallop Cut
3/8” (9.53 mm)
7/16” (11.11 mm)
1/2” (12.70 mm)
9/16” (14.29 mm)
5/8” (15.88 mm)
11/16” (17.46 mm)

Straight Cut
1/4” (6.35 mm)
5/16” (7.98 mm)
3/8” (9.53 mm)
7/16” (11.11 mm)
1/2” (12.70 mm)
9/16” (14.29 mm)
5/8” (15.88 mm)
11/16” (17.46 mm)