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
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可以通过电子邮件与JW乳胶顾问来解决问题
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US Researchers Develop Soya Polymer for Nappies
Researchers at Ohio-based Battelle Memorial Institute believe they’ve got to the bottom of the nappy market by developing soya-based polymers that can replace as much as one-third of the petroleum products currently used in those products.
Soya bean-based soy meal can replace 33% of acrylic-based super-absorbent polymers – also known as hydrogels – while keeping the same absorption rate of 200 to 300 times their own weight, officials with Battelle said.
The market for super-absorbent polymers (SAPs) is estimated at more than three billion pounds per year, with nappies and other personal care items making up well over half of demand. Battelle researchers now are looking to commercialise the soya-based polymers, which were developed with funding provided by the United Soybean Board and the Ohio Soybean Council.
Earlier this year, Battelle licensed technology to make soya bean-based polyols to agricultural firm Emery OleoChemicals of Cincinnati. Emery has begun sampling the products to customers for use in flexible and rigid foams and other markets, and hopes to have the polyols in commercial production by the end of the year.
By Frank Esposito
Deterioration of Rubber Products by Water
Manufacturer: Should we worry about the water resistance of our rubber products? What test we need to do to measure the water resistance and how to ensure our products have maximum resistance to water?
John Woon (Senior Latex Consultant): Generally speaking most rubbers have some inherent water repellency when compared to other materials such as paper, fabric, wood and leather. All rubbers whether natural or synthetic, adsorb water to a certain extent resulting in a lower physical properties such as tensile strength.
The standard test for water resistance is similar to that for oil resistance (ASTM D471). This test method covers the required procedures to evaluate the comparative ability of rubber and rubber-like compositions to withstand the effect of liquids by immersion.
You have to be aware of the fact that the choice of your compounding ingredients play an important part in the sensitivity of rubber to water. The use of hydrophilic and water soluble materials should be avoided or minimised. Also, a deproteinised natural rubber is superior to other grades of natural rubber.