Ultra-permeable PVC (polyvinyl chloride) film and preparation method thereof
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A technology of rubber and zinc powder, which is applied in the field of ultra-transparent PVC film and its preparation, can solve the problems of thick PVC film, low transparency of PVC film, poor low temperature toughness, etc., and achieve the effect of small thickness
Active Publication Date: 2013-02-13
FOSHAN WEIMING PLASTICS
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[0004]However, the existing PVC film has low transparency, and due to its poor low temperature toughness, the thickness of PVC film is generally thick
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[0019] A kind of ultra-permeable PVC film of the present invention, the raw material of its weight percentage is composed of: PVC glue material 75%, zinc powder 10%, oil 2%, plasticizer DOP 10%, cadmium barium zinc composite stabilizer 3% .
[0020] In this embodiment, epoxidized soybean oil is used as oil, which has no pollution to food and can be used for food packaging.
[0021] The PVC film with this composition has good transparency, good toughness and tear resistance, and can obtain a PVC film with a thickness of 0.5 mm, which is durable.
[0022] The preparation steps of the ultra-permeable PVC film of the present invention include: batching, banburying, kneading, filtering, extruding, six-roll calendering, passing pure water, drying, shaping, refrigerating, winding and packaging.
[0023] ①The mixing temperature is 100-120℃.
[0024] ②The refining temperature is 80-100℃.
[0025] ③ Extrusion adopts twin-screw extrusion, and the temperatures are 100-120°C, 120-140°C,...
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Abstract
The invention discloses an ultra-permeable PVC (polyvinyl chloride) film which comprises the following raw materials by weight percentage: 60%-80% of PVC sizing material, 5%-10% of zinc powder, 1.5%-2% of oil, 10%-30% of plasticizer DOP (dioctyl-phthalate) and 2%-4% of cadmium barium zinc compound stabilizer. A preparation method of the ultra-permeable PVC film comprises the following steps of: burdening, banburying, refining in an open way, filtering, extruding, calendaring by six rollers, introducing purified water, drying, shaping, refrigerating, coiling and packing. The PVC film obtained by the invention is small in thickness which can be less than 1.2mm, nontoxic, high in photo-permeability, impact-resistant, tear-resistant, free from combustion, and free from moisture absorption, thereby being particularly suitable for the requirement of various high-speed automatic packaging machinery. Therefore, the film disclosed by the invention can be widely used for the package for the printing industry, the furniture, the drug, the articles of everyday use and the like, and plays a part in moisture resistance and dust resistance.
Description
technical field [0001] The invention relates to a PVC film, in particular to a super-permeable PVC film and a preparation method thereof. Background technique [0002] The natural color of polyvinyl chloride is light yellow translucent and shiny. Transparency is better than polyethylene and polypropylene, and worse than polystyrene. Depending on the amount of additives, it can be divided into soft and hard PVC. Soft products are soft and tough, and feel sticky. The hardness of hard products is higher than that of low-density polyethylene. And lower than polypropylene, there will be whitening at the inflection. [0003] PVC with plasticizer added has satisfactory mechanical strength required by engineering plastics, such as tensile strength, elongation, impact strength, bending strength, etc., so people use polyvinyl chloride (PVC) as the main body, with various A kind of processing aid, developed by extrusion blow molding method, developed a PVC film suitable for candy, fo...
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