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Novel method for large-scale preparation of silver-containing inorganic antimicrobial master batch for high-transparency plastics

A large-scale preparation and antibacterial masterbatch technology, applied in the field of plastics, can solve the problem of destroying the transparency of PC, achieve the effect of stable appearance and color, dispersion and protection of silver particle agglomeration

Active Publication Date: 2014-02-26
SANHE JINGNA ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the use of organic guanidine salt and chitosan will decompose at high temperature, producing toxic and harmful gases, and nano-titanium dioxide and nano-silver oxide powder will also destroy the transparency of PC due to dispersion, agglomeration and refraction problems.

Method used

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  • Novel method for large-scale preparation of silver-containing inorganic antimicrobial master batch for high-transparency plastics
  • Novel method for large-scale preparation of silver-containing inorganic antimicrobial master batch for high-transparency plastics
  • Novel method for large-scale preparation of silver-containing inorganic antimicrobial master batch for high-transparency plastics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] Example 1: Preparation of silver-containing inorganic antibacterial masterbatch of the present invention

[0080] Add 0.2 parts by weight of high silver oxide ultrafine powder, 99 parts by weight of PMMA resin, 1 part by weight of composite dispersant (PVPk30 / AClyn201A=1:2), and 0.5 parts by weight of pentaerythritol into the high-speed mixer produced by Zhangjiagang Chuangjia Machinery Co., Ltd. , carry out high-speed mixing and stirring treatment at 1000rpm for 4 minutes to fully knead evenly, and then put it into a large-capacity devolatilization twin-screw extruder produced by Nanjing Lixuan Machinery Equipment Co., Ltd. to melt and extrude at high temperature to obtain granules. Silver-containing inorganic antibacterial masterbatch. The length-to-diameter ratio of the screw is 56:1, the processing temperature is 260-270°C, and the screw speed is 100rpm.

[0081] Use the PMMA antibacterial masterbatch that this embodiment prepares, adopt the method described in t...

Embodiment 2

[0082] Example 2: Preparation of silver-containing inorganic antibacterial masterbatch of the present invention

[0083] Add 1.0 parts by weight of silver citrate, 95 parts by weight of PC resin, 3 parts by weight of composite dispersant (PVPk90 / sarin resin 8920=1:2), and 1.0 parts by weight of pentaerythritol stearate into Zhangjiagang Chuangjia Machinery Co., Ltd. In the high-speed mixer produced by the company, high-speed mixing and stirring treatment was carried out at 1500rpm for 3 minutes to fully mix and evenly mix, and then put into a large-capacity devolatilization twin-screw extruder produced by Nanjing Lixuan Machinery Equipment Co., Ltd. for high-temperature melt extrusion Granules to obtain the silver-containing inorganic antibacterial masterbatch. The length-to-diameter ratio of the screw is 56:1, the processing temperature is 270-300°C, and the screw speed is 120rpm.

[0084] Using the PC antibacterial masterbatch prepared in this example, use the method desc...

Embodiment 3

[0085] Example 3: Add 2.0 parts by weight of silver behenate, 96 parts by weight of PC resin, 2.5 parts by weight of composite dispersant (PVPk30 / AClyn295A=1:2), and 1.0 parts by weight of pentaerythritol phosphate into the high-speed mixing machine produced by Zhangjiagang Chuangjia Machinery Co., Ltd. In the machine, carry out high-speed mixing and stirring treatment at 800rpm rotating speed for 4min to fully mix and evenly, and then put it into a reaction type twin-screw extruder produced by Lanzhou Lantai Plastic Machinery Co., Ltd. to melt and extrude at high temperature to obtain granulation. Silver inorganic antibacterial masterbatch. The length-to-diameter ratio of the screw is 58:1, the processing temperature is 260-280°C, and the screw speed is 90rpm.

[0086] Using the PET antibacterial masterbatch prepared in this example, the method described in this manual is used for detection, and the antibacterial samples Escherichia coli (ATCC 25922) and Staphylococcus aure...

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Abstract

The invention relates to a novel method for large-scale preparation of a silver-containing inorganic antimicrobial master batch for high-transparency plastics. According to the method, the preparation of the silver-containing inorganic nano antimicrobial master batch is completed on a reaction type or devolatilization type twin-screw extruder with length-diameter ratio through the chemical pyrolysis principle of silver salt and an oxide by using an ultrahigh-temperature (260-350 DEG C) processing process of plastics. The silver-containing inorganic antimicrobial master batch prepared by the method has excellent antibacterial performance and outstanding transparency and safety performance, is low in production cost, is suitable for large-scale industrial production and can be widely applied to the fields of food and medical treatment, such as high-transparency antibacterial baby milk bottles, freshness maintaining boxes and medical surgical trays.

Description

technical field [0001] The invention relates to the technical field of plastics. More specifically, the present invention relates to a method for preparing a silver-containing inorganic antibacterial masterbatch for highly transparent plastics, in particular to a preparation process of a silver-containing inorganic antibacterial masterbatch that is simple, low in production cost, and suitable for large-scale production. method. Background technique [0002] Due to the advantages of light weight, good toughness, easy molding, and low cost, plastics are increasingly used instead of glass in modern industry and daily products, especially in optical instruments and packaging industries, and the development is particularly rapid. Plastics used to replace glass are commonly called transparent plastics, among which PMMA (polymethyl methacrylate), PET (polyethylene terephthalate), PC (polycarbonate), PA (polyamide), PPSU (polyphenylene sulfone) or PES (polyether sulfone), etc. Fo...

Claims

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Application Information

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IPC IPC(8): C08L33/12C08L67/02C08L69/00C08L77/00C08L81/06C08K13/02C08K3/08C08K3/22C08J3/22
Inventor 李泽国姜虹娟
Owner SANHE JINGNA ENVIRONMENTAL PROTECTION TECH CO LTD
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