Wuhan Handern Plastic Laminate
DATE：2020/5/22 8:29:08 / READ： / SOURCE：This station
Wuhan Handern Plastic Laminate
Plastic laminate is an improvement on two other old products that have been used, namely paper shells and steel paper. Paper shells are cellulose fibers with gum or starch (also often containing various fillers). It was popular in the mid-17th century. It was introduced from Asia and began to appear in Europe in the form of decorative lacquer boxes, plates, and other artworks. The paper shell gives a lightweight structure and has surprisingly good tensile strength, toughness and stiffness. It soon discovered that it could be made into masks, doll heads, shoe heels, picture frames and tubes. The patent literature also suggests manufacturing large paper shell structures, such as screen partitions, packaging boxes, and possibly car door and instrument panels. www.handern.com Meltblown non-woven equipment
Steel paper is made by impregnating cotton paper in concentrated cold zinc chloride solution. Impregnation makes the fiber swell strongly, the outer layer is gelatinized, and then the swelled fiber is pressed into the desired shape, and zinc chloride is leached out. After drying, the surface of the gel fiber forms a comprehensive consolidation between the fiber and the fiber, which makes its material performance similar to that of the paper shell. Leo Baekeland was awarded in 1912 to use fiber-phenolic resin composites to make laminate U.S. Patent, products made with thermosetting phenol resins are much more water-resistant than paper shells or steel paper, and the fibers give the resins its winding and toughness. www.handern.com Meltblown non-woven equipment
This discovery caused people to impregnate saturated paper sheets or paper webs with novolac, and then dry them to remove most of the solvent. Several sheets of resin-impregnated flat paper are stacked, heated and pressurized in a hydraulic press. Hot pressing causes the phenol resin to condense (polymerize) and process the loose paper stack into an integrated laminate. The thickness of the laminate can be adjusted by changing the number and basis weight of the paper stack. Changes in resin content and resin composition will change the physical properties of laminates. The rapid growth of the automotive and electrical industries has provided ready-made market potential for all three products, including gears, monoliths, and electrical insulation materials. In most cases, phenolic laminates can obtain the required performance at a lower price, so they have completely driven other products out of the market. www.handern.com Meltblown non-woven equipment
Because of the brown-black color of the phenol star laminate, it can only be used in occasions where aesthetic requirements are not important. Attempts were made to dye the phenol laminate, but the effect was not great. Until the second world war, melamine-methan resin was obtained To solve this problem. Thereafter, the laminate composed of melamine: methyl resin impregnated paper and phenol resin impregnated layer became the standard decorative laminate. After the Second World War, the decorative material laminate (or decorative The material panel) has developed very slowly. They have now become the main plastic laminate products. www.handern.com Meltblown non-woven equipment
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