PA-80 Rubber for Extrusion

Manufacturer: We were advised to add "PA-80 Rubber" to our compound to improve our extrusion process for tubes and hoses. Would appreciate if you can tell us more about "PA-80 Rubber.











John Woon (Senior Latex Consultant): PA-80 Rubber is made from blending 80% prevulcanised latex with 20% unvulcanised latex followed by the usual coagulation process to give crumbs compressed into bale form.

If this is used in normal rubber compound for extrusion at,say, 30 to 80 phr, it gives the following positive results:

1) Lesser distotion to extruded shape (especially during steam vulcanisation)
2) Faster extrusion rate
3) Lesser die swell
4) Smoother surface