Bonding Santoprene to HDPE

Tammaron Technologies manufactures an HDPE bonding agent called Tam Tech which might do the trick for you. Check out the specs on their website. They also do specialty products so if the Tam Tech adhesive doesn't work for you per has you could contact them directly for a special mix?

Richard
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You can modify the surface by flame or corona treatment to help. Santoprene grades usually contain about 40% PP, which is also difficult to bond and not that compatible (in the melt) with HDPE, so platten welding will not be that good. Some high temperature hot melt adhesives will have compatiblity with both and are an option. Emabond will do a good job for a high volume application but require extensive development and tooling which make it uneconomical for smaller volume runs. If you coroma treat the HDPE free books, you might be able to use a cynoacrylate from Loctite.

under www.tack-service.com you find under products the new tack treat as 3000,for pe santoprene,silicon,tpu,pp,nylon and....

I may have posted this twice. If so please forgive the duplicate note. Akron Coatings and Adhesives has recently developed a line of adhesives designed specifically to bond Santoprene to various surfaces. These adhesives do not require any primer and many are water-based for easy clean up.

For more information, contact Christian D. Sokolowski at cds@akroncoating.com or call (330)724-4716.

Cliff Questel

Akron Coating and Adhesives has developed a variety of adhesives specifically for santoprene. For more information you can contact Christian D. Sokolowski at cds@akroncoating.com or call (330) 724-4716.

We were able to finally bond HDPE to Santoprene using a loctite primer and then a loctite glue.. this seems to give us a really strong bond. Thank you to all those replied.

HDPE is a low energy material. Therefore glues that do not wet the surface will have difficulty bonding. You can modify the surface by flame or corona treatment to help. Santoprene grades usually contain about 40% PP, which is also difficult to bond and not that compatible (in the melt) with HDPE, so platten welding will not be that good. Some high temperature hot melt adhesives will have compatiblity with both and are an option. Emabond will do a good job for a high volume application but require extensive development and tooling which make it uneconomical for smaller volume runs. If you coroma treat the HDPE, you might be able to use a cynoacrylate from Loctite.

All bets are off on finding a good way to bond silicone to HDPE.

>If PE doesn't bond well, why
>are so many hot melt
>glue guns sold?

Because craft work does not require strong bonds between ribbons and flowers, wood and cloth, pine cones and whaterver...

If PE doesn't bond well, why are so many hot melt glue guns sold?

Santoprene is a poly pro based material. Since PP&PE are olefenic resins you will get a natural thermo-bond between the two. Have done it many times when I was with AES/Monsanto in the process lab with very good success rate.

Robert

according to the bonding charts I have, PE does not bond very good to anything. Surprising since I would have thought the same as the first reply. You could contact Santoprene or Multibase which has a silicone based TPV. Both of them should be able to help you select a bondable product if they have one.

Santoprene is EPDM rubber in a PP matrix. I would think that using HDPE you can acheive a natural thermo bond between the two. Check The Santoprene website(www.santoprene.com) Look for the bonding or injection molding guide. I know there are several technical papers within their site that should help you. What grade of Santoprene are you using and what is the actual melt temperature? Make sure you let your HDPE parts set for 24 hours prior to molding the Santoprene on them or you will get very little bonding. Parts must be free of grease oil and contaminates. You may have to pre-heat inserts prior to overmolding to enhance bonding.

Robert