Rubber's Standard

JWT's rubber standards are instrumental in specifying, testing, and assessing the physical, mechanical, and chemical properties of a wide variety of materials and products that are made of rubber and its elastomeric derivatives. Rubber, which can either be synthetically produced or derived from the milky colloidal suspension found in the sap of some plants, exhibits unique properties that render it extensively useful in many applications and products. These rubber standards allow rubber manufacturers and end-users to examine and evaluate their material or product of concern to ensure quality and acceptability towards safe utilization.

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Natural rubber & Synthetic rubbers

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Natural rubber Natural Rubber - Solid state Natural rubber is made from a runny, milky white liquid called  latex  that oozes from certain plants when you cut into them. (Common dandelions, for example, produce latex; if you snap off their stems, you can see the latex dripping out from them. In theory, there's no reason why we couldn't make rubber by growing dandelions, though we'd need an awful lot of them. Although there are something like 200 plants in the world that produce latex, over 99 percent of the world's natural rubber is made from the latex that comes from a tree species called  Hevea brasiliensis , widely known as the rubber tree . This latex is about one third water and one third rubber particles held in a form known as a  colloidal  suspension. Natural rubber is a polymer of isoprene (also known as 2-methylbuta-1,3-diene) with the chemical formula (C 5 H 8 )n. To put it more simply, it's made of many thousands of basic C 5 H 8 units (the mon
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Types of Liquid Silicone Rubber

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Silicone rubbers are man-made polymer materials that have a wide range of industrial and manufacturing applications. The various types of silicone rubbers include room temperature vulcanize, liquid silicone, fluorosilicone and high-consistency rubber. In this post, we’ll provide information about liquid silicone rubber, including what it is and the types that are available for manufacturing purposes. WHAT IS LIQUID SILICONE RUBBER? Liquid silicone rubber (LSR) is classified as an elastomer, which means it possesses exceptional elasticity (ability to resume its normal shape after stretching). Key LSR attributes include hardness, tensile strength (resistance to break under tension) and compression set. Other LSR characteristics include excellent bacteria resistance and hydrophobicity, meaning that it acts as a water repellent. The two liquid silicone rubber types include food grade and medical grade. WHAT IS FOOD GRADE LSR? Food grade liquid silicone rubber is well-suited for
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An Introduction About Plastic And Marrin Litter

Plastic is present everywhere around us – its durability, low cost, light weight and easily modified shape and properties has led to almost exponential increase in production since its large-scale manufacturing started in 1950s. Nowadays the global annual production of plastics exceeds 311 million tons and it is expected to rise year after year. Plastic is a synthetic material consisting of polymers, which form the basic structure of plastic. This structure can be modified to fulfil different needs by using additives that for example improve the flexibility or strength of the material. The wide variety of different plastics have their unique properties which make them suitable for different applications, e.g. packaging or insulation. Marine litter includes all anthropogenic material that has been entered the marine environment by intentional or unintentional actions of human beings. The composition of marine litter varies between locations, but usually most of the litter consists of p
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