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Preparation method and application of antibacterial polyethylene master batch

A polyethylene and masterbatch technology, applied in the field of preparation of antibacterial polyethylene masterbatches, can solve the problems of agglomeration, uneven distribution, poor filterability, etc., achieve good filterability and film-forming performance by casting, and inhibit reproduction and spread. Effect

Active Publication Date: 2021-04-20
厦门翔鹭化纤股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are also antibacterial masterbatches with silver oxide, copper oxide, and zinc oxide as active ingredients on the market, but generally silver oxide, copper oxide, and zinc oxide have large particle sizes and uneven distribution, and poor filterability during production. Disadvantages such as reunion

Method used

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  • Preparation method and application of antibacterial polyethylene master batch
  • Preparation method and application of antibacterial polyethylene master batch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) 50 parts by weight of S16 bacteriostatic agent are fully dispersed in 100 parts by weight of pure water to obtain a dispersion, in which the active ingredients of S16 bacteriostatic agent are separated out in a suspended liquid state;

[0032] (2) Add 0.5 parts by weight of tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythyl ester to the dispersion obtained in step (1), and mix well;

[0033] (3) add 0.3 parts by weight of sodium hydroxide in the material of step (2) gained, mix homogeneously;

[0034] (4) drying the material obtained in step (3) at 100° C. to obtain antibacterial powder;

[0035] (5) 4 parts by weight of the antibacterial powder of step (4) gained and 96 parts by weight of the film-grade polyethylene powder whose melt index center value is 2g / min are dropped into the mixer, and stirred and mixed at a high speed at a speed of 1000rpm for 5min;

[0036] (6) The material obtained in step (5) is sent into a twin-screw extruder fo...

Embodiment 2

[0038] (1)-(4) are the same as embodiment 1.

[0039] (5) 6 parts by weight of the antibacterial powder of step (4) gained and 94 parts by weight of film-grade polyethylene powder whose melt index center value is 2g / min are dropped into the mixer, and stirred and mixed at a high speed at a speed of 1000rpm for 5min;

[0040] (6) The material obtained in step (5) is sent into a twin-screw extruder for melt granulation, the length-to-diameter ratio of the screw of the twin-screw extruder is 40: 1, and the temperature of the melt granulation is 200 ± 3 ℃, the screw speed is 280rpm, the S16 bacteriostatic agent is further uniformly dispersed in polyethylene by shearing and kneading of the twin-screw, then extruded and granulated, and dried to obtain the transparent bacteriostatic polyethylene masterbatch.

Embodiment 3

[0042] (1)-(4) are the same as embodiment 1.

[0043] (5) 8 parts by weight of the antibacterial powder of step (4) gained and 92 parts by weight of the film-grade polyethylene powder whose melt index center value is 2g / min are dropped into the mixer, and stirred and mixed at a high speed at a speed of 1000rpm for 5min;

[0044] (6) The material obtained in step (5) is sent into a twin-screw extruder for melt granulation, the length-to-diameter ratio of the screw of the twin-screw extruder is 40: 1, and the temperature of the melt granulation is 207 ± 3 °C, the screw speed is 250rpm, the S16 bacteriostatic agent is further uniformly dispersed in the polyethylene through the shearing and mixing of the twin-screw, and then extruded and granulated, and dried to obtain the transparent bacteriostatic polyethylene masterbatch.

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Abstract

The invention discloses a preparation method and application of an antibacterial polyethylene master batch, and the preparation method comprises the following steps: (1) fully dispersing an S16 bacteriostatic agent with organic zinc as an effective component in pure water to obtain a dispersion liquid; (2) adding tetra [3-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester into the dispersion liquid obtained in the step (1), and uniformly mixing; (3) adding sodium hydroxide into the material obtained in the step (2), and uniformly mixing; (4) drying the material obtained in the step (3) to obtain antibacterial powder; (5) mixing the antibacterial powder obtained in the step (4) with film-grade polyethylene powder; and (6) feeding the material obtained in the step (5) into a double-screw extruder for melt granulation. The product prepared by the invention has the characteristics of bacteriostasis, no toxicity and permanent effect.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a preparation method and application of antibacterial polyethylene masterbatch. Background technique [0002] Polyethylene film is a high molecular polymer with excellent performance. Polyethylene film has excellent biodegradability and is non-toxic. It is a new generation of environmentally friendly plastic film material. As a functional material, the antibacterial masterbatch is blended with ordinary polyethylene materials before processing Melt extrusion can obtain a long-lasting, safe and stable functional polyethylene film material with antibacterial properties. [0003] Ordinary polyethylene film has poor stability and is easy to oxidize. The oxidized structure is easily attacked by microorganisms and mildew occurs. The common method on the market is to utilize the processing method of post coating film, CN110959610A a kind of medical silver ion anti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K5/56C08K5/103C08J3/22
Inventor 刘龙敏刘志麟郑铮田艳艳蔡禄生刘茜
Owner 厦门翔鹭化纤股份有限公司
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