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JW Latex Consultants (and Rubber Consultants,乳胶顾问) offer solutions to your problems in Natural Rubber latex and Synthetic Rubber latex processing and the manufacturing of latex products (condoms, catheters, medical gloves, baby teats and soothers, toy balloons etc) Quick answers through e-mails are possible at reasonable cost.

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Friday, December 11, 2009

Polyvinyl acetate emulsion (latex) as stiffening agent



Manufacturer: We are manufacturer from Europe. Besides using latex (both natural and synthetic), we are also using Polyvinyl acetate (PVac) as a binding agent for textiles and felt etc. Our aim is to increase the body and stiffness of the textiles. Can use advise us on the choice of the right grade of PVac?

John Woon (Senior Latex Consultant): Some Polyvinyl acetate emulsions (or rather latex) are plasticized either externally or internally through copolymerization with one or more different monomers. For maximum stiffness you should select one that is not plasticized or only lightly plasticized. Also, emulsion with coarser particle size would have more stiffening effect than those with finer particle size.

For your application, usually a low solid content is required. Hence the emulsion you select should have good colloidal stability on addition of water.

It might interest you to know that PVac emulsion with coarser particle size also tend to have better freeze-thaw stability especially when the polymer has a relatively higher molecular weight while the plasticizer content is not too high.

Having said that, you could also consider using PVac as a stiffening and reinforcing agent for your natural rubber latex.

You are at the site for answers and solutions to all your problems in natural rubber latex processing and manufacturing of industrial, household and medical gloves, condoms, catheters, baby teats and baby pacifiers, toy balloons, latex foam products, latex threads etc.

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