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A technology of thin film and nano-titanium dioxide, which is applied in the field of plastic film, can solve the problems of insufficient antibacterial and antibacterial performance, achieve good smooth effect, ensure sliding performance, change sliding and anti-sticking effect
Active Publication Date: 2020-12-04
浙江森纳新材料科技有限公司
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Problems solved by technology
[0004] Aiming at the problems of insufficient antibacterial and antibacterial properties in the prior art, the first object of the present invention is to provide a BOPP film, which has the advantages of excellent antibacterial properties
Method used
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preparation example 1
[0052] Prepare antibacterial polypropylene pellets, it may further comprise the steps:
[0053] S1, put polypropylene and polyhexamethyleneguanidine hydrochloride into a high-speed mixer and stir well;
[0054] S2, melting and extruding the mixture into granules through a twin-screw extruder, the granulation temperature is 220° C., and the rotation speed is 350 rpm;
[0055] S3, drying the extruded pellets in a constant temperature oven at 90° C. for 3 hours to obtain antibacterial polypropylene pellets.
preparation example 2
[0057] Preparation of loaded zinc sulfate nano-titanium dioxide fibers comprises the following steps:
[0058] S1, put the saturated solution of zinc sulfate and nano-titanium dioxide fibers into the reaction kettle, and heat at 300°C for 10 hours;
[0059] S2, cooled to room temperature, washed 3 times with distilled water;
[0060] S3, put it in an oven, and dry it at 80° C. for 8 hours.
Embodiment 1
[0063] A kind of BOPP film, comprises surface layer, core layer and bottom layer, by weight, and the raw material composition of core layer is as shown in table 1.
[0064] The preparation method of BOPP film comprises the following steps:
[0065] S1, raw material preparation: prepare antibacterial polypropylene pellets by mixing polypropylene and polyhexamethyleneguanidine hydrochloride;
[0066] S2, Extrusion: Take antibacterial polypropylene pellets, nano-titanium dioxide fibers, silicone, sodium lauroyl amate, and nano-calcium carbonate, and extrude on an extruder at 220°C to obtain a core layer, and simultaneously prepare a surface layer and a bottom layer;
[0067] S3, forming: pass the surface layer, core layer and bottom layer through a three-layer co-extrusion film head, pass through a salivating machine at 230°C, and cool and form through a cooling system at 20°C;
[0068] S4, Stretching: stretch the film longitudinally at 110°C, with a stretching ratio of 6.5 time...
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Abstract
The invention relates to the field of plastic films, and particularly discloses a BOPP film and a preparation method thereof.The BOPP film comprises a surface layer, a core layer and a bottom layer, and the core layer is prepared from, by weight, 50-60 parts of polypropylene; 2-3 parts of nano titanium dioxide; 0.2-0.4 part of an antibacterial agent; 0.1-0.2 part of a slipping agent; 0.5-1 part ofan antistatic agent; and 5-6 parts of a pearling agent. Polyhexamethylene guanidine hydrochloride is adopted as the antibacterial agent. The polyhexamethylene guanidine hydrochloride is an organic antibacterial agent with a certain polymerization degree, does not contain a heterocyclic structure, is relatively high in safety, has a melting point far lower than the processing temperature of polypropylene, can be fully melted in the polypropylene during processing, does not easily influence the haze and light transmittance of the antibacterial BOPP film, and provides a good antibacterial property for the BOPP film.
Description
technical field [0001] The invention relates to the field of plastic films, more specifically, it relates to a BOPP film and a preparation method thereof. Background technique [0002] Biaxially oriented polypropylene (BOPP) film has the advantages of high strength, high transparency, high gloss, high stiffness, good thermal stability, non-toxic, etc., high quality and moderate price, widely used in food, beverages, cigarettes, clothing, etc. The industry's packaging quickly occupied the plastic packaging market. [0003] However, due to the trace air permeability and water permeability of the BOPP film itself, when packaging products with a long shelf life, it is easy to be corroded by mold and microorganisms, thereby affecting the actual shelf life of the product and bringing hidden dangers to consumers. ,Room for improvement. Contents of the invention [0004] In view of the problems of insufficient antibacterial and antibacterial properties in the prior art, the firs...
Claims
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