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Antibacterial toughened polyethylene film and preparation method thereof

A polyethylene film and toughening technology, applied in the field of polyethylene film, can solve the problems of reducing the toughness, strength and mechanical properties of polyethylene film materials, reducing the continuity of amorphous structure regions, etc.

Pending Publication Date: 2021-09-10
北京冬曦既驾科技咨询有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For the above-mentioned related technologies, the inventor believes that by adding antibacterial materials in polyethylene film, in the technical scheme of improving the antibacterial performance of polyethylene film materials, the additives will affect the physical and mechanical properties of packaging materials, reducing the polyethylene film. The continuity of the amorphous structure region of the material, thereby reducing the toughness, strength and mechanical properties of the polyethylene film material

Method used

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  • Antibacterial toughened polyethylene film and preparation method thereof
  • Antibacterial toughened polyethylene film and preparation method thereof

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preparation example Construction

[0037] In the second aspect, the present application provides a method for preparing an antibacterial and toughened polyethylene film. The preparation steps of the antibacterial and toughened polyethylene film include: S1. The tough particles are stirred and mixed in a high-speed stirring device, and the mixed material is collected; S2, the mixed material is placed in a twin-screw extruder, and the temperature of the first zone to the seventh zone of the twin-screw extruder is adjusted to 140°C and 170°C in sequence , 170°C, 170°C, 170°C, 170°C, 160°C, extrude and granulate at a speed of 55r / min and collect the extruded particles; S3, then stir and mix the extruded particles with high-density polyethylene particles and place In the blown film machine, adjust the temperature of the first zone, the second zone and the third zone of the blown film machine to 165°C, 180°C and 180°C in sequence, and the temperature of the extrusion die is 165°C, and the film can be produced by extru...

preparation example 1

[0054] Stir and mix zinc nitrate and aluminum nitrate according to the Zn:Al molar ratio of 3:1, collect the mixed particles and add them to deionized water, adjust the solution concentration to 0.3mol / L, take the metal oxide sol with the same molar mass as aluminum nitrate , stir and mix the solution with a metal oxide sol with a particle size of 20nm to collect the matrix liquid, adjust the pH of the matrix liquid to 8.5, and then keep stirring at 35°C for 24h, filter and collect the filter cake, and dry at 75°C for 6h. Prepare antibacterial and toughened particles; add antibacterial and toughened particles to 0.85mol / L sodium hydroxide solution, stir and mix and let stand for 15h, then centrifuge at 2500r / min for 10min, remove the lower layer of precipitate and rinse with deionized water for 3 After that, vacuum freeze-dry to prepare alkali-treated antibacterial and toughened particles 1.

preparation example 2

[0056] Stir and mix zinc nitrate and aluminum nitrate according to the Zn:Al molar ratio of 3:1, collect the mixed particles and add them to deionized water, adjust the solution concentration to 0.3mol / L, take the metal oxide sol with the same molar mass as aluminum nitrate , stir and mix the solution with a metal oxide sol with a particle size of 20nm to collect the matrix liquid, adjust the pH of the matrix liquid to 8.5, and then keep stirring at 45°C for 24h, filter and collect the filter cake, and dry at 80°C for 7h. Prepare antibacterial and toughened particles; add antibacterial and toughened particles to 1mol / L sodium hydroxide solution, stir and mix and let stand for 17h, then centrifuge at 2750r / min for 12min, remove the lower layer of precipitate and rinse it with deionized water 4 times Afterwards, vacuum freeze-drying to prepare alkali-treated antibacterial and toughened particles 2.

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Abstract

The invention discloses an antibacterial toughening type polyethylene film and a preparation method thereof, the antibacterial toughening type polyethylene film comprises the following components in parts by weight: 45-50 parts of high density polyethylene particles, 15-20 parts of low density polyethylene particles, 0.5-0.75 part of an antioxidant, and 6-8 parts of antibacterial toughening particles; the antibacterial toughening particles are hydrotalcite particles prepared by metal oxide sol intercalation; and the preparation method comprises the following steps: stirring and mixing the low-density polyethylene particles, the antioxidant and the antibacterial toughening particles according to a formula, and collecting a mixed material; s2, extruding and granulating the mixed material, and collecting extruded particles; and S3, stirring and mixing the extruded particles and high-density polyethylene particles, extruding, blowing a film, and rolling to prepare the antibacterial toughened polyethylene film. The antibacterial toughening type polyethylene film can be used for fresh-keeping packaging and has excellent antibacterial performance and mechanical strength, and the mechanical strength of a polyethylene film fresh-keeping packaging material is improved.

Description

technical field [0001] The application relates to the field of polyethylene film, more specifically, it relates to an antibacterial and toughened polyethylene film and a preparation method thereof. Background technique [0002] The principle of antibacterial packaging is to add antibacterial to packaging materials, so that the packaging materials have the function of inhibiting or slowing down the growth of microorganisms, and then maintain the quality of packaged food and extend the shelf life. Polyethylene is a high molecular polymer polymerized from ethylene monomer. It is the most widely used variety in synthetic resins. It is mainly used to make films and daily necessities. Therefore, polyethylene film is also widely used in various packaging materials. [0003] Publication No. in the related art is the Chinese patent of CN108997634A, discloses a kind of preparation method of degradable antibacterial polyethylene film, and its step is: (1) take TiO of equal mass and Ni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K9/12C08K9/10C08K3/22C08K3/26C08J5/18
CPCC08J5/18C08J2323/06C08J2423/06C08K9/12C08K9/10C08K3/26C08K2003/2296C08K2003/2248C08K2003/2241C08K2201/011
Inventor 张家秀
Owner 北京冬曦既驾科技咨询有限公司
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