阅读说明：本技术 一种抗菌母粒及其制备方法 (Antibacterial masterbatch and preparation method thereof ) 是由 张建 于 2019-09-19 设计创作，主要内容包括：本发明揭示了一种抗菌母粒,该抗菌母粒由20-40份氧化锌粉末、60-80份热塑性树脂、0.1-1份分散剂和1-5份着色剂组成。另外,本发明还揭示了一种抗菌母粒的制备方法,其包括如下步骤：称量：按配比称取氧化锌粉末、热塑性树脂、分散剂和着色剂；预混：将氧化锌粉末和分散剂加入高速混料机进行预混合；混合：将热塑性树脂和着色剂加入高速混料机进行混合。本发明的抗菌母粒,通过加入氧化锌粉末使母粒具有良好的抗菌功能,并且抗菌功能持续稳定,在制备时,先加入氧化锌粉末和分散剂进行预混,再加入热塑性树脂和着色剂进行混合,可以使原料充分混合,制备出成分更为均衡的抗菌母粒,提高后续制备的塑料制品的抗菌效果。(The invention discloses an antibacterial master batch which is composed of 20-40 parts of zinc oxide powder, 60-80 parts of thermoplastic resin, 0.1-1 part of dispersing agent and 1-5 parts of coloring agent. In addition, the invention also discloses a preparation method of the antibacterial master batch, which comprises the following steps: weighing: weighing zinc oxide powder, thermoplastic resin, dispersant and colorant according to a ratio; premixing: adding zinc oxide powder and a dispersing agent into a high-speed mixer for premixing; mixing: the thermoplastic resin and the colorant are mixed in a high-speed mixer. According to the antibacterial master batch, the zinc oxide powder is added to enable the master batch to have a good antibacterial function, the antibacterial function is continuous and stable, during preparation, the zinc oxide powder and the dispersing agent are added for premixing, then the thermoplastic resin and the coloring agent are added for mixing, so that the raw materials can be fully mixed, the antibacterial master batch with more balanced components is prepared, and the antibacterial effect of a plastic product prepared subsequently is improved.)

1. an antibacterial master batch is characterized in that: the antibacterial master batch consists of 20-40 parts of zinc oxide powder, 60-80 parts of thermoplastic resin, 0.1-1 part of dispersing agent and 1-5 parts of coloring agent.

2. the antimicrobial masterbatch of claim 1, wherein: the antibacterial master batch comprises 20 parts of zinc oxide powder, 77 parts of thermoplastic resin, 1 part of dispersing agent and 2 parts of colorant component.

3. the antimicrobial masterbatch of claim 1, wherein: the antibacterial master batch consists of 40 parts of zinc oxide powder, 56 parts of thermoplastic resin, 0.1 part of dispersing agent and 3.9 parts of coloring agent.

4. the antimicrobial masterbatch of claim 1, wherein: the antibacterial master batch consists of 30 parts of zinc oxide powder, 64.5 parts of thermoplastic resin, 0.5 part of dispersing agent and 5 parts of coloring agent.

5. the antimicrobial concentrate of any one of claims 1-4, wherein: the thermoplastic resin is selected from the same type of polymer as the matrix resin of the plastic article desired to be prepared.

6. The antimicrobial concentrate of any one of claims 1-4, wherein: the thermoplastic resin is polyethylene, polyethylene terephthalate, high-density polyethylene, polypropylene or polystyrene.

7. The antimicrobial concentrate of any one of claims 1-4, wherein: the dispersing agent is one or more of silicone oil, polyethylene wax, polypropylene wax, oxidized polyethylene wax, stearic acid or zinc stearate.

8. A method for preparing the antibacterial masterbatch according to any one of claims 1 to 7, which is characterized by comprising the following steps:

Weighing: weighing zinc oxide powder, thermoplastic resin, dispersant and colorant according to a ratio;

Premixing: adding zinc oxide powder and a dispersing agent into a high-speed mixer for premixing;

Mixing: the thermoplastic resin and the colorant are mixed in a high-speed mixer.

9. The method for preparing the antibacterial masterbatch according to claim 8, is characterized in that: after the mixing step, the method also comprises the following steps:

extruding: adding the mixed raw materials into a screw extruder for extrusion;

and (3) granulation: the strand silk extruded by the screw extruder is cooled and solidified by cooling water and then cut into particles by a granulator.

10. the method for preparing the antibacterial masterbatch according to claim 8, is characterized in that: in the weighing step, weighing is performed using a mettlertyoli multi-electron balance.

Technical Field

the invention relates to an antibacterial master batch and a preparation method thereof.

Background

At present, the application of plastics is more extensive, and plastics which are in direct contact with drinking water or food, such as plastic containers for containing water in drinking water machines, are often used in the drinking water or food industry. Plastics that come into contact with drinking water or food need to have certain antimicrobial properties to prevent contamination of drinking water and food and to reduce bacterial growth. In the prior art, the antibacterial master batch is usually added into the plastic to enable the plastic to generate certain antibacterial performance, but the antibacterial master batch additive in the prior art has various complex components, so that the antibacterial capability is poor, and the complex components can generate adverse effects on drinking water or food; in addition, when the master batch is produced in the prior art, all raw materials are generally weighed and then mixed, and the raw materials are mostly powder, so that the raw materials are difficult to mix uniformly, the raw materials in each produced master batch are uneven in distribution, and the antibacterial performance is difficult to guarantee after the master batch is made into plastics.

disclosure of Invention

the invention aims to provide the antibacterial master batch and the preparation method thereof aiming at the defects in the prior art, and the antibacterial master batch has good antibacterial effect and can be applied to plastic products contacting with drinking water or food.

In order to achieve the above object, the present invention provides an antibacterial masterbatch comprising 20 to 40 parts of zinc oxide powder, 60 to 80 parts of thermoplastic resin, 0.1 to 1 part of dispersant and 1 to 5 parts of colorant.

Further, the antibacterial master batch comprises 20 parts of zinc oxide powder, 77 parts of thermoplastic resin, 1 part of dispersing agent and 2 parts of colorant component.

Further, the antibacterial master batch is composed of 40 parts of zinc oxide powder, 56 parts of thermoplastic resin, 0.1 part of dispersing agent and 3.9 parts of coloring agent.

Further, the antibacterial master batch is composed of 30 parts of zinc oxide powder, 64.5 parts of thermoplastic resin, 0.5 part of dispersing agent and 5 parts of coloring agent.

further, the thermoplastic resin is selected from the same type of polymer as the matrix resin of the plastic article to be produced.

Further, the thermoplastic resin is polyethylene, polyethylene terephthalate, high-density polyethylene, polypropylene, or polystyrene.

Further, the dispersing agent is one or more of silicone oil, polyethylene wax, polypropylene wax, oxidized polyethylene wax, stearic acid or zinc stearate.

On the other hand, the invention also provides a preparation method of the antibacterial master batch, which comprises the following steps:

Weighing: weighing zinc oxide powder, thermoplastic resin, dispersant and colorant according to a ratio;

premixing: adding zinc oxide powder and a dispersing agent into a high-speed mixer for premixing;

mixing: adding thermoplastic resin and a colorant into a high-speed mixer for mixing;

Further, after the mixing step, the method further comprises the following steps:

Extruding: adding the mixed raw materials into a screw extruder for extrusion;

And (3) granulation: the strand silk extruded by the screw extruder is cooled and solidified by cooling water and then cut into particles by a granulator.

Further, in the weighing step, weighing is performed using a mettlerlington multi-electronic balance.

compared with the prior art, the invention has the advantages that:

According to the antibacterial master batch, the zinc oxide powder is added to enable the functional master batch to have a good antibacterial function, the antibacterial function is continuous and stable, the zinc oxide powder and the dispersing agent are added to be premixed during preparation, the thermoplastic resin and the coloring agent are added to be mixed, raw materials can be fully mixed, the antibacterial master batch with more balanced components is prepared, and the antibacterial effect of a plastic product prepared subsequently is improved. The invention adopts the resin made of food-grade materials, can be directly applied to plastics contacting with drinking water or food, for example, is used for preparing the activated carbon rod in water purifying equipment, can ensure that the activated carbon rod has good antibacterial capacity, and has no adverse effect on water quality. In addition, the antibacterial master batch can also be applied to other fields, such as water purification, fabrics, clothes, packaging, household toilets and the like.

Detailed Description

the following non-limiting detailed description of the present invention is provided in connection with the preferred embodiments.

An antibacterial master batch is composed of 20-40 parts of zinc oxide powder, 60-80 parts of thermoplastic resin, 0.1-1 part of dispersing agent and 1-5 parts of coloring agent.

The thermoplastic resin is selected from the same type of polymer as the matrix resin of the plastic article to be produced, to ensure chemical compatibility of the thermoplastic resin with the matrix resin, and the thermoplastic resin is a food grade material, which may be, for example, Polyethylene (PE), polyethylene terephthalate (PET), High Density Polyethylene (HDPE), polypropylene (PP), or Polystyrene (PS).

The dispersing agent is one or more of silicone oil, polyethylene wax, polypropylene wax, oxidized polyethylene wax, stearic acid or zinc stearate.

A preparation method of antibacterial master batch comprises the following steps:

weighing, namely weighing zinc oxide powder, thermoplastic resin, a dispersing agent and a coloring agent according to the proportion by using a Mettlerlatidol electronic balance;

Premixing: adding zinc oxide powder and a dispersing agent into a high-speed mixer for mixing, wherein the mixing speed is 800-;

mixing: adding the thermoplastic resin and the colorant into a high-speed mixer for mixing, wherein the mixing speed is 450-550 revolutions per minute, and the mixing time is 15-25 minutes;

extruding: adding the mixed raw materials into a screw extruder for extrusion, wherein the rotating speed of the screw extruder is 250-400 r/min, and the extrusion temperature is 230 ℃; preferably the screw extruder is a twin screw extruder.

And (3) granulation: and cooling and solidifying the filaments extruded by the screw extruder by cooling water, cutting the filaments into granules by a granulator, and drying to obtain the antibacterial master batch.