-----------------

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.

You Are Visitor Number:

counter
Expedia Promotional Codes

__________________________

This Site Is Best Viewed With Mozilla Firefox Browser. If You Are Viewing With Internet Explorer, It Is Advisable to Switch to Mozilla Firefox By Going to This Link -> http://www.mozilla.org/en-US/firefox/new/

It Is Free to Download

__________________________

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

__________________________

Please kindly donate to support the maintenance of this site. We'd appreciate it very much.

__________________________

__________________________________________________________________________

Thursday, August 31, 2006

Testimonial from Durban University of Technology

TESTIMONIAL: Mr. JOHN WOON

My name is Ugan Padayachee, a South African Mechanical Engineering student. I am deeply indebted to Mr. Woon for the personal assistance he provided me during my latex research.

I have no experience with chemistry and was assigned the task of developing a latex bag as part of my training. I asked many students and lecturers for assistance but no one was prepared to sacrifice their personal time. The internet was basically my only source of information. It took me months to create a product which resembled a bag, which was far from complete. I was on the verge of giving up when I stumbled across Mr. Woon's website which I immediately emailed.

I firmly believe that Mr. Woon is an invaluable mentor. It is rare finding professional people such as Mr Woon who offers expert services to students and others. Mr. Woon made it his honourable duty and an effort to reply to all of my emails as promptly as possible, and provided me with a detailed professional analysis. This obviously resulted in an immediate success in my project. Never did Mr. Woon mention a fee but was always too glad to help me out. I greatly appreciate the time and valuable advice that he offered me.

Although I did not personally meet Mr. Woon, I strongly believe that he is a man driven by passion and love for helping others. His expertise in his field of Latex Technology is highly recommended to anyone seeking advice.

Yours Sincerely

Ugan Padayachee

August 31, 2006



*Ugan Padayachee can be contacted at ugan@mighty.co.za


You are at the site for answers and solutions to all your problems in natural rubber latex processing and manufacturing of medical gloves, condoms, catheters, baby teats and baby pacfiers.

Wednesday, August 30, 2006

Sweden banned brominated flame retardant?

Despite EU's exemption of brominated flame retardant, deca-BDE (Brominated Diphenyl Ethers) from its Restriction of Hazardous Substances legislation following the conclusion of its ten-year assessment, the Swedish government decided on 24 August to restrict deca-BDE in textiles, furniture and cables starting from 1 January 2007.

The European Brominated Flame Retardant Industry Panel was reported to have said that this unilateral action was a serious breach of EU law and risked being brought before the EU Court of Justice.


You are at the site for answers and solutions to all your problems in natural rubber latex processing and manufacturing of medical gloves, condoms, catheters, baby teats and baby pacfiers.

Monday, August 28, 2006

Functions of Higher Fatty Acid Soaps of Natural Rubber Latex

Manufacturer: What are other functions of fatty acid soaps we add to latex besides improving the mechanical stability of our latex compounds?

JohnWoon: The fatty acid soaps or rather the Higher Fatty Acid (some times referred to as HFA) soaps do not come solely from those you add during compounding. In fact, it derives from the so-called non-rubbers of natural rubber latex of which about 50% is lipid material. The lipid materials contain phospholipids along with natural waxes, sterols and sterol esters. (HFA contains mainly palmitic, stearic, oleic and linoleic)

When we produce latex concentrates, ammonia is added as a preservative. With time, the phospholipid would be hydrolysed into fatty acid soaps, among other things, in the presence of ammonia. The whole process takes about 3 to 4 weeks. We therefore normally observe a gradual a rise in the mechanical stability of natural rubber latex (MST) from the day it is produced. Occasionally such rise is inadequate for good proccesibility hence the requirement of extra addition during compounding.

The crosslinking potential in a typical sulphur vulcanization system is also affected by the presence of HFAs since they form part of the activating system by solubilizing Zinc. It is therefore understandable that in the curative recipes for many dry rubber products, the addition of 1 to 2 parts stearic acid is very common.

Also, some quarters believe that fatty acid soaps lead to a reduction of the surface tension of the latex compounds resulting in better wetting, a prerequisite property required for good dipping process and more even spread of latex onto former surface.

Having said this, one should bear in mind the negative effects of such fatty acid soaps i.e. the increased foaming and webbing tendency.




You are at the site for answers and solutions to all your problems in natural rubber latex processing and manufacturing of medical gloves, condoms, catheters, baby teats and baby pacfiers.

Friday, August 11, 2006

Agglomerate free nano-sized Zinc Oxide

With approximately 1,300 R&D partnerships worldwide, BASF has recently signed a one-year contract with the Singapore-based NanoMaterials Technology Pte Ltd (NMT) focusing on nanoparticle synthesis and application development.

The collaboration will involve the use of NMT's technology for producing stabilised and agglomerate-free zinc oxide nanosuspensions (less than 20 nanometres). Functionalities can also be applied to the ZnO which can then be used in catalysts, polymers and pigments.


You are at the site for answers and solutions to all your problems in natural rubber latex processing and manufacturing of medical gloves, condoms, catheters, baby teats and baby pacfiers.

Thursday, August 10, 2006

Premature failure of latex thread

Manufacturer:We are latex thread manufacturer. We have received complaints from customers who dye their garments with elastic waistbands and find the waistbands failing by their own customers after a short period of use. Please help us find the causes of this problem.

JohnWoon:Many people do not realize that both the dyes and the dyeing process could be detrimental to the rubber and hence service life of the rubber thread and for that matter, other "rubberized" products such as bath mats.

The symptoms you'd probably encounter are the loss of strength and modulus resulting in stickiness and eventual brittleness. The choice of dyes is therefore important as some of these might contain transition metals that could catalyze the oxidation of the rubber.

Dyeing process should be controlled to have as low a temperature as possible with a pH as close to neutral as possible because washing rubber products with hot water at alkaline pH could lead to premature loss of antioxidants.

You are at the site for answers and solutions to all your problems in natural rubber latex processing and manufacturing of medical gloves, condoms, catheters, baby teats and baby pacfiers.

Tuesday, August 08, 2006

Food packaging containing latex?

Researchers at Leatherhead Food International, UK, has revealed that one-third of the food packaging tested was "contaminated" with natural rubber latex with the highest level in an ice-cream wrapper.

The researchers also reported that latex had been transferred to the food, with the highest level being found in a chocolate biscuit.

Experts from the UK Latex Allergy Support Group (LASG) hope that EU would use this "evidence" to consider the necessity for labeling. However some quaters believe that this is over reacting.

Around 1-6% of the population is believed to be potentially sensitive to natural rubber latex in the UK.


You are at the site for answers and solutions to all your problems in natural rubber latex processing and manufacturing of medical gloves, condoms, catheters, baby teats and baby pacfiers.

Link

__________________________

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.

__________________________