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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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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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Friday, June 09, 2017

Aqueous Dispersions of Rubber Chemicals

Manufacturer: We are encountering poor dispersion of rubber chemicals such as sulphur, accelerators and antioxidants used for latex compounding. This has resulted in sedimentation to the extent of forming hard cakes that are difficult to be re-dispersed. We would appreciate very much if you could give us some guidance to overcome this problem.

John Woon (Senior Latex Consultant): Achievement of a well milled and well dispersed rubber chemical in water entails a lot of details which cannot be sufficiently covered in this forum. If you want, I can prepare a comprehensive report for you.

However, in the mean time, you should pay close attention on all factors that allow you to achieve the following:


  • Wetting of Chemical Particles: All the air from the particle surface and between the particles of the aggregates and agglomerates must first be replaced by the solution of a dispersing agent or agents. The particle/gaseous interface should then be transformed into a solid/liquid interface.
  • Milling or Grinding and Separation: The composite from above mentioned step is then subjected to mechanical energy via impact and shear forces. As a result, the agglomerates are broken up  into smaller units and evenly dispersed.
  • Stabilization of the Chemicals Particles in Suspension: The chemical dispersion is stabilized by dispersing agents via the adsorption of molecules of these dispersing agents (usually some surfactants) at the chemical particle surface. This prevents or minimizes sedimentation and phase-separation.  
Let me know if you require a more comprehensive report with recommended recipes for the dispersion of each chemical you are using.

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What has the bouncing ball to do with tyres?

Latex Gloves Educational Articles from the Malaysian Rubber Export Promotion Council

How do you select your medical gloves?

Rubber Chemicals: Carcinogenicity, Mutagenicity, Clastogenicity.

Why is Compression Set measurement important?

Assessment of Latex Stability

Joule Effect

Poor Flocking Quality Of Household Gloves

Creaming of Latex

What is Vulcanization?

History of Latex Dipped Products

Applications of Prevulcanized Latex

Defoamer Creating Havoc in Glove Factory

Problems With Milling Rubber Chemicals

Medical Gloves From Guayule Latex

Introduction to SMG Gloves

 

 

Click on The Following Links to Read More Articles:

[Advantages of Vulcanization] [Applications of PV Latex] [Bacteria and Latex] [Chemical Toxicity] [Cross-Linking Density] [Biodegradability] [Black Articles] [Blooming] [Bouncing Ball] [Compression Set] [Condoms] [Creaming] [Defoamer] [FDA] [Fatty Acid Soaps] [Flame Retardant] [Flocking] [Food Packaging] [Glove Demand] [Glove Selection] [Guayule Latex] [History of Gloves] [Joul Effect] [Latex Stability] [Latex Thread] [Milling Problem] [MREPC Articles] [Nano Polymer Particles] [Nano ZnO] [Polychloroprene] [REACH] [SMG] [Storage Hardening] [Vulcanization] [Vytex] [Yulex]

Disclaimer:
The information and data contained in this site are believed to be accurate and reliable. However it is the responsibility of the visitors and readers to satisfy themselves that the information is workable under their own processing conditions. Hence the owners of this site make no warranties concerning the suitability of the information given in this site.

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