Interaction between Plastisol ôJelly worm stuffö and other plastic mat 1

[davis45]

Would molding a Plastisol substance with another type of plastic or rubber help within it cause any problems with either one. If so with this problem be more pronounces if the to were to be required to deform and stretch frequently.

 

[dwightdixon]

Dave,

any plastisol contains massive amounts of PVC plasticizer which attack may other kinds of plastic. You can not reliably use jelly worm material around most other kinds of plastics. Time and temperature will aggreviate the problem. Flexing and stretching have little effect. If you want these kind of properties in a less aggressive material, you might try Kraton based jellys. They contain massive amounts of mineral oil which are slightly less objectionable. What part of the world are you from? maybe I can suggest a supplier. What other kinds of plastic is the jelly to come into long term contact with?

 

[davis45]

(I am from Alabama)
I was wandering how easy would the politicizes found in the Plastisol transfer to a material contained within it? I am thinking that if the politicizes did transfer from material to material the second material would only increase in volume and flexibility but not break or tear. I am not really sure though, I am hoping that it would not lose its continuity. Molecularly, what would really be happening?

 

[patprimmer]

Davis

I am finding your posts quite difficult to understand, but plastisols have different effects on different plastics, from softening PVC to no effect on nylons or polyesters to stress cracking polycarbonate.

Any results by mixing plastics and depending on the plasticiser migrating will at best be useless and at worst produce a catastrophic failure.

Regards

eng-tips, by professional engineers for professional engineers
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

 

[dwightdixon]

If you have the jelly worm material in contact with another flexible vinyl, that vinyl will soften greatly and lose its strength. If the jelly worm material is in contact with styrene, the styrene will dissolve and the jelly worm will melt into it. If the jelly worm material is in contact with polycarbonate, the polycarbonate piece will crack. PVC jelly worm material is almost useless for anything but jellyworms. Styrenic TPE jellies (used in shoe inserts) are alot less objectionable to most plastics, but contact with other flexible PVC materials will destroy the styrenic TPE compound.

I also find your posting to contain poor english and demonstrate a lack of knowledge of plastics. You should hire a consultant before you market something which will cause you great liability and monitary loss.

 

[davis45]

I thank each of you for your help. I am just beginning my engineering career through the CO-OP program, so any constructive criticisms that you give will be very helpful. They will help me as I grow to become a professional engineer.