You will have to ask a conveyor belt manufacturere for that sort of proprietory information. The Malaysian rubber industry have a central association which might be inclined to help as well...for a fee. Then there's RAPRA in Shawbury, Shropshire, UK who will definitely charge you a fee for their often cursory attention. ■

The bonding strength obtained using a good quality cold vulcanisng adhesive on rubber to rubber is around 1 Kg/mm for 90 Degree peel.

Rajagopal ■

Dear Mr. Ganesh,

I don't have the DIN standards with me. I think DIN 22101 refers to Splice area of fabric Belts. The standards should be same for elevated beltings also. The splicing area only will change depending on the Belt rating. For a cold joint a bonding strength og 8-10 Kg/cm2 can be achieved. You can calculate the are of splice from this once the belt rating is known.

Rajagopal ■

Greetings and salutations SGanesh,

one question comes to mind, How can we have a verifiable standard for materials when the material to be moved is the unknown-meaning the type of material, volume carried, weight, size, impact loading?

I am afraid the cobra in the basket will never be the same one all the time every time though.

Your points are valid none the less. The ASTM and the various manufacturers organizations and OSHA and MSHA are the cats that must be herded unfortunately. I am afraid this is one of those situations that will require delicate surgery with every application of the known variables.

And a decision tree. ■

We use 12N/mm on test strips when trying to rip them off.

So Rajagopal is correct.

We use this (or fairly close to it) in SABS 1669 part II for the bonding of pulley lagging too.

Cheers

LSL Tekpro ■