Oil-based neoprene has a cell penetration of 60-70%, whereas limestone neoprene has a 94% cell penetration. These are independent closed cells (bubbles basically) within the neoprene that are packed together at an extremely high density. Limestone neoprene has a high micro-cell structure. What are the advantages of limestone neoprene? This is the first of four stages that form the basic process of converting limestone to neoprene. The calcium carbonate, found in the limestone, is used as the base with chloroprene by a process of polymerization to produce limestone based-chloroprene rubber chips. Yamamoto has set the standard for quality and innovation in the neoprene industry with their advanced manufacturing techniques, leading to the creation of a limestone neoprene that has a completely independent cell structure and multi-directional stretch capacity. It was Yamamoto Corporation from Osaka, Japan that first developed neoprene from limestone-and with no oil at all-thanks to an abundance of pure limestone close by in the mountains of Japan (their reserve of limestone is estimated to be sufficient for the next 3,000 years). Today, nearly 90% is used for chemical and industrial uses. In 1900, more than 80% of the lime used in the U.S. In the United States, lime use has changed dramatically. Ancient Egyptian civilization used lime to make plaster and mortar. Archeological discoveries in Turkey indicate lime was used as a mortar as far back as 7,000 years ago. It has numerous uses: as a building material, as aggregate for the base of roads, as white pigment or filler in products such as toothpaste or paints and as a chemical feedstock.Īs a key part of construction, limestone and lime has been used for thousands of years. Limestone makes up about 10% of the total volume of all sedimentary rocks. Limestone (CaCO3) is a sedimentary rock composed largely of the minerals calcite and aragonite, which are both different crystal forms of calcium carbonate (the stuff needed for limestone neoprene). The core ingredient of limestone neoprene, of course, is limestone.
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