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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Send Your Enquiry and Orders To: woonsungliang@yahoo.com.sg
Problem Solving Through E-Mails with John Woon Latex Consultants Is Possible
可以通过电子邮件与JW乳胶顾问来解决问题
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Sodium Soaps vs Potassium Soaps as Latex Stabilisers
Manufacturer: We use both KOH and NaOH for making our fatty acid soaps as stabilizers for our latex compounds. We are experiencing more problem with sodium soaps especially when there is a change in ambient temperatures. Why?
John Woon (Senior Latex Consultant): Simple. The reasons are as follows:
1) Sodium soaps are less soluble than potassium soaps.
2) Sodium soaps are harder than potassium soaps.
3) Sodium soaps tend to gel at lower temperatures although this phenomenon is reversible.
Therefore from technical point of view, there is no reason why you should use sodium hydroxide although it might be cheaper than potassium hydroxide.
Blowing Agent (Foaming agent) for PVC Plastisol
Manufacturer: We are manufacturers of products based on PVC
plastisols including PVC gloves. We are now venturing into making foamed
products but our initial work has not been successful. We believe that this could
be due the wrong choice of blowing agent as our processing temperature is quite
low at about 120 C. We would appreciate very much if you could suggest
some suitable blowing agents for our use.
John Woon (Senior Latex Consultant): Some of the most common blowing agents used for rubber and plastic do have high decomposition temperatures of more than 150
°C which would of course not work satisfactorily if your processing temperature is only 120
°C.
I suggest you evaluate the following:
Azo nitriles, bezene sulphonic acid hydrazide and ditroso pentamethylene tetramine.
Let me know the outcome in due course.