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Polylactic acid antibiosis master batch, and preparation method and application thereof

A technology of antibacterial masterbatch and polylactic acid, which is applied in the field of polylactic acid antibacterial masterbatch and its preparation and application, can solve the problems of harmful antibacterial silver ions, high processing temperature of polylactic acid, and long processing time, so as to prevent thermal degradation and avoid Effects of material degradation, extended molding methods and applications

Active Publication Date: 2016-02-24
吉冠(上海)新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a polylactic acid antibacterial masterbatch to solve the problem that antibacterial silver ions are harmful to the human body
[0008] The present invention also provides the preparation method and application of the polylactic acid antibacterial masterbatch, which is used to solve the problems of excessively high processing temperature and excessively long processing time resulting in severe thermal degradation of polylactic acid

Method used

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  • Polylactic acid antibiosis master batch, and preparation method and application thereof
  • Polylactic acid antibiosis master batch, and preparation method and application thereof
  • Polylactic acid antibiosis master batch, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1-4

[0042] The preparation method of polylactic acid antibacterial masterbatch in embodiment 1-4 comprises the following steps:

[0043] (A) Weigh the zinc-loaded silicon hydrochloric acid antibacterial agent, dispersant, and polylactic acid base material according to the formula and pour them into the mixer. After mixing the ingredients at normal temperature for 2 minutes, they are discharged from the discharge port. Normal temperature mixing can prevent Polylactic acid thermal degradation;

[0044] (B) Pour the mixture into the hopper of the twin-screw extruder, turn on the feeding control switch, the speed of feeding is proportional to the speed of mixing, the mixture enters the twin-screw machine and is extruded into a linear shape, after 0-5°C After the cooling tank is cooled, the blower is air-dried, and the temperature of the air outlet of the blower is kept at 10-20°C. Finally, the mixed plastic strips enter the granulator for granulation, and become the final antibacteria...

Embodiment 5

[0057] The polylactic acid antibacterial masterbatch obtained in Example 1 is added to the polylactic acid base material, and plastic parts that are not exposed to a temperature higher than 70°C are formed by injection molding. It is especially suitable for forming plastic cutting boards. The processing process is as follows:

[0058] Mix the antibacterial masterbatch and polylactic acid base material, and put the mixed material into an injection molding machine equipped with a molding mold for injection molding. Adjust the temperature of the injection molding machine to 180-212°C, the mixture is stirred and dissolved by the screw, heated in the first, second, third, fourth, and fifth zones of the injection molding machine, injected into the mold, and passed through the second level of pressure holding After forming, the product is taken out immediately after cooling in the mold, placed in ice water for another 3 minutes and then taken out to obtain the finished product.

[00...

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PUM

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Abstract

The invention discloses a polylactic acid antibiosis master batch, and a preparation method and an application thereof The polylactic acid antibiosis master batch is composed of a zinc-loaded silicate antiseptic, a dispersant and a polylactic acid base material. The preparation method of the polylactic acid antibiosis master batch comprises the following steps: mixing the zinc-loaded silicate antiseptic, the dispersant and the polylactic acid base material in proportion, stirring until uniformity, carrying out extrusion molding through a double screw extruder, cooling with cooling water, drying through air drying, and granulating to prepare the polylactic acid antibiosis master batch. The polylactic acid antibiosis master batch is applied in molding of plastic parts with the contact temperature being not higher than 70DEG C, and the application process is characterized in that raw materials comprising the polylactic acid antibiosis master batch and the polylactic acid base material undergo injection molding through an injection molding machine to obtain the plastic parts. The polylactic acid antibiosis master batch is nontoxic and environmentally-friendly, and all operating processes of the preparation method and the application solve the problem of severe thermal degradation caused by too high processing temperature and too long processing time of polylactic acid processing, so the molding mode and the application of polylactic acid are developed.

Description

technical field [0001] The invention relates to a polylactic acid antibacterial masterbatch, a preparation method and application thereof. Background technique [0002] Polylactic acid (PLA) is a polymer compound polymerized with lactic acid as the main raw material. It belongs to a type of lactide polyester. It is made of starch raw materials proposed by renewable plant resources (such as corn). The raw material is made into lactic acid through the fermentation process, and then converted into polylactic acid through chemical synthesis, and the production process is pollution-free. After use, polylactic acid products can be completely degraded by microorganisms in nature, and finally generate carbon dioxide and water without polluting the environment. Even if polylactic acid is incinerated, its combustion calorific value is the same as that of incinerated paper, which is half that of incinerated traditional plastics (such as polyethylene). Moreover, the incineration of pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K9/12C08K3/08B29B9/06B29C47/92B29C45/78B29C45/34B29C45/73B29C48/92
CPCB29B9/06B29C45/0001B29C45/34B29C45/7312B29C45/78B29C48/92B29C2945/76531B29C2948/92704C08K3/08C08K2003/0806C08L67/04
Inventor 熊蕊心
Owner 吉冠(上海)新材料科技有限公司
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