A kind of preparation method of stretch stretch film
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A technology of stretching stretch film and longitudinal stretching, which is applied in the field of preparation of stretch stretch film, can solve the problems of poor tensile strength, etc., and achieve the effect of improving tensile strength, stable chemical properties, and not easy to agglomerate
Active Publication Date: 2020-12-11
安徽友发包装科技有限公司
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[0005] The technical problem to be solved by the present invention: Aiming at the problem of poor tensile strength of the stretch stretch film currently on the market, a preparation method of the stretch stretch film is provided
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[0017] In parts by weight, weigh 10-15 parts of polytetrafluoroethylene, 14-19 parts of polyethylene, 1-8 parts of carbon nanotubes, 5-10 parts of polylactic acid, 2-6 parts of hexene copolymerized polyethylene, 0.1-0.6 parts of antioxidant, 0.1-0.4 parts of dispersant, 2-5 parts of silica sol, 0.1-0.6 parts of nano-titanium dioxide, mix polytetrafluoroethylene, polyethylene, hexene-copolymerized polyethylene and polylactic acid evenly, at temperature Insulate at 70-90°C for 1-3 hours to obtain a blend. Mix carbon nanotubes, silica sol and nano-titanium dioxide evenly to obtain a composite sol. Put the composite gel at a temperature of 40-50°C and a vacuum of 0.04 Vacuum drying at ~0.08mbar for 24-72 hours to obtain a composite gel. Mix the blend, composite gel, antioxidant and dispersant, and stir for 30-60 minutes at a stirring speed of 80-90r / min to obtain a mixture. The mixture is poured into a twin-screw extruder, extruded at a temperature of 180-215°C to obtain a cast sh...
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Abstract
The invention relates to a preparation method for a stretch wrap film, which belongs to the technical field of packaging materials. According to the method, carbon atoms in carbon nanotubes are hybridized by adopting SP2, so that the carbon nanotubes have high modulus and high strength, the carbon nanotubes have good mechanical properties, the carbon nanotubes with good flexibility can be stretched, and therefore the composite material which is prepared by adding the carbon nanotubes can show good strength, elasticity, fatigue resistance and isotropy. Because silica sol is adopted to wrap titanium dioxide and the carbon nanotubes in the method, titanium dioxide and the carbon nanotubes can be uniformly distributed and cannot be easily agglomerated; because the wrapping material is added, the silica sol which is a stable disperse system for silica colloid particles in water can act along with nanoscale titanium dioxide, so that the chemical property of the wrapping material is stable; moreover, as a continuous body with a spatial reticular structure, the silica sol has a large specific surface area to firmly adsorb the carbon nanotubes, and thereby the tensile strength of the stretch wrap film is effectively increased.
Description
technical field [0001] The invention relates to a preparation method of a stretch stretch film, belonging to the technical field of packaging materials. Background technique [0002] Packaging materials refer to the materials used to make packaging containers, packaging decoration, packaging printing, packaging and transportation to meet product packaging requirements, including metal, plastic, glass, ceramics, paper, bamboo, wild mushrooms, natural fibers, Main packaging materials such as chemical fibers and composite materials, as well as auxiliary materials such as strapping, decoration, and printing materials. [0003] Stretch film is an industrial film product, which has the advantages of high tensile strength, high elongation, good self-adhesiveness, and high transparency. It can be used for manual stretch film and machine stretch film, and can be widely used in the concentration of various goods. Packaging, wrapping the goods stacked on the pallet, making the packagi...
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