阅读说明：本技术 一种具有抗菌效果的可降解包装板材及其制备方法 (degradable packaging plate with antibacterial effect and preparation method thereof ) 是由 廖集汉 于 2019-07-09 设计创作，主要内容包括：本申请属于包装材料技术领域,尤其涉及一种具有抗菌效果的可降解包装板材及其制备方法,可降解包装板材,其采用硅藻土作为板材的基材,再结合可降解的高分子材料醇酸树脂、聚乙二醇、EVA颗粒等热塑成型,无毒无污染,可生物降解,同时加入能与硅藻土发生化学反应的抗菌母料,使其产生较大的抑菌圈,因此具有良好的抑菌作用。本申请通过以发泡剂、EVA颗粒、聚乙二醇、硅藻土作为主体有机材料,以醇酸树脂、抗菌剂作为辅料,通过这些材料热塑、预发泡、冲压成型的可降解包装板材密度小、刚性好、强度高,而且掩埋在相对湿度达到50％以上的泥地内,在掩埋达到1-2年后,该可降解的包装板材严重破损,几乎降解,降解率达到95％以上,具有良好的降解效果。(The application belongs to the technical field of packaging materials, especially, relate to a degradable packaging board and preparation method with antibacterial effect, degradable packaging board, it adopts diatomaceous earth as the substrate of panel, and thermoplastic molding such as degradable macromolecular material alkyd, polyethylene glycol, EVA granule etc. is reunited, and is nontoxic pollution-free, but biodegradable, adds simultaneously can take place the antibiotic masterbatch of chemical reaction with diatomaceous earth, makes it produce great antibacterial ring, consequently has good antibacterial action. According to the degradable packaging board, the foaming agent, the EVA particles, the polyethylene glycol and the diatomite are used as main organic materials, the alkyd resin and the antibacterial agent are used as auxiliary materials, the degradable packaging board formed by thermoplastic molding, pre-foaming and punch forming is small in density, good in rigidity and high in strength, and is buried in a mud land with the relative humidity of more than 50%, after the degradable packaging board is buried for 1-2 years, the degradable packaging board is seriously damaged and almost degraded, the degradation rate reaches more than 95%, and a good degradation effect is achieved.)

1. The degradable packaging board with the antibacterial effect is characterized by comprising the following components:

2. The degradable packaging board with antibacterial effect as claimed in claim 1, wherein the foaming agent is azodicarbonamide foaming agent.

3. The degradable packaging board with antibacterial effect as claimed in claim 1, wherein the antibacterial agent is one or more of zeolite powder, zinc oxide powder, copper oxide powder, ammonium dihydrogen phosphate and lithium carbonate.

4. The degradable packaging board with antibacterial effect as claimed in claim 1, wherein the compatibilizer is a graft of polyolefin and maleic anhydride, the graft ratio is 0.8-1.0%, and the melt index is 70-110g/10min under the conditions of 200 ℃ and 2 kg.

5. a method for preparing a degradable packaging board with antibacterial effect as claimed in any one of claims 1 to 4, which comprises the following steps:

1) Raw material treatment and mixing: preparing materials according to claim 1, and uniformly mixing a foaming agent, EVA particles, alkyd resin, polyethylene glycol and diatomite in a stirring kettle to obtain a mixture A;

2) And (3) constant temperature: heating the mixture A to 70-90 ℃, keeping the temperature constant, slowly adding the latex, the antibacterial agent and the compatilizer, and stirring at a constant speed to obtain a mixture B;

3) thermoplastic molding: pre-foaming the mixture B in a thermoplastic furnace at the heating temperature of 110-120 ℃ for 35-50 minutes, wherein the volume of the pre-foaming is 5-8 times of the original volume;

4) Die pressing: compressing the pre-foamed volume to 2-3 times of the original volume by mechanical die pressing; at this time, the mold has uniformly arranged pores with a density of 500000-1000000 pores/m³；

5) foaming: placing the plate into a foaming machine for heating and foaming to form a plate, wherein the heating temperature is 200-220 ℃, and heating is carried out for 45-50 minutes to ensure that chemical substances contained in the plate perform chemical reaction again, and in the foaming process, the weight is unchanged, and the volume is increased to 15-20 times of the original volume; and in the foaming process, inert gas is uniformly injected for slow expansion of air holes to form the plate, and the antibacterial property of the plate is 10-30 cm.

6) and (3) curing: curing the foamed board in a multi-section curing furnace for pore formation;

7) And (3) cooling: cooling to room temperature;

8) Slicing: cutting the plate into a required shape and thickness;

9) Cutting: cutting the cut plate to a required size and specification;

10) Stamping forming: and (5) performing punch forming on the two sides of the cut plate by using a stamping die after the two sides of the cut plate are glued.

6. The method for preparing a degradable packaging board with antibacterial effect as claimed in claim 5, wherein in step 1), the inert gas is argon.

7. the preparation method of the degradable packaging board with the antibacterial effect as claimed in claim 5, wherein in the step 6), a three-stage curing furnace is adopted for curing, wherein the temperature of the first stage is 120-130 ℃, the temperature of the second stage is 100-110 ℃, and the temperature of the third stage is 80-90 ℃.

[ technical field ] A method for producing a semiconductor device

The application belongs to the technical field of packaging materials, and particularly relates to a degradable packaging plate with an antibacterial effect and a preparation method thereof.

[ background of the invention ]

the prior product is mostly packaged by molded or assembled polystyrene, which has poor degradation performance and is not environment-friendly, the packaging material of the product formed by the polystyrene is degraded slowly, which easily causes serious environmental pollution problem, and bacteria is easily generated after long-term contact, and the antibacterial ability is poor. With the rapid development of packaging technology, packaging materials are developed in the direction of greenization, and how to degrade the packaging materials conveniently after use and how to resist the attack of various germs becomes a hotspot of research.

[ summary of the invention ]

In order to overcome the defects of the prior art, the application aims to provide a degradable packaging plate which is low in manufacturing cost, high in strength, easy to degrade and good in bacteriostatic action, and also provides a method for preparing the packaging plate.

The technical scheme adopted for solving the technical problem is as follows:

A degradable packaging board with an antibacterial effect is prepared from the following materials in parts by weight:

Preferably, the blowing agent is an azodicarbonamide blowing agent. The azodicarbonamide foaming agent can be used as a foaming agent for foaming various foamed plastics, has the advantages of good elasticity, uniform cell diameter and good strength, is convenient to use and low in price, can effectively improve the processing performance and the mechanical and physical properties of various materials of the degradable packaging board, can enhance the mobility among polyethylene glycol molecules after being mixed with the polyethylene glycol of the degradable packaging board, enables the polyethylene glycol molecules to be closely connected, is convenient for polymerization formation among various materials, and greatly enhances the stability after polymerization.

Preferably, the antibacterial agent is one or more of zeolite powder, zinc oxide powder, copper oxide powder, ammonium dihydrogen phosphate and lithium carbonate. By reasonably selecting the antibacterial agent, the thermal oxidation degradation of the alkyd resin can be effectively inhibited, the polymerization among materials is facilitated, the polymerization stability among the materials is enhanced, so that a bacteriostatic ring is formed on the surface of the plate, and the antibacterial agent has a good bacteriostatic action.

Preferably, the compatilizer is a graft of polyolefin and maleic anhydride, the grafting ratio is 0.8-1.0%, and the melt index is 70-110g/10min under the conditions of 200 ℃ and 2 kg.

The method for preparing the degradable packaging board with the antibacterial effect comprises the following steps:

1) raw material treatment and mixing: preparing materials according to claim 1, and uniformly mixing a foaming agent, EVA particles, alkyd resin, polyethylene glycol and diatomite in a stirring kettle to obtain a mixture A;

2) and (3) constant temperature: heating the mixture A to 70-90 ℃, keeping the temperature constant, slowly adding the latex, the antibacterial agent and the compatilizer, and stirring at a constant speed to obtain a mixture B;

3) Thermoplastic molding: pre-foaming the mixture B in a thermoplastic furnace at the heating temperature of 110-120 ℃ for 35-50 minutes, wherein the volume of the pre-foaming is 5-8 times of the original volume;

4) die pressing: compressing the pre-foamed volume to 2-3 times of the original volume by mechanical die pressing; at this time, the mold has uniformly arranged pores with a density of 500000-1000000 pores/m³；

5) Foaming: placing the plate into a foaming machine for heating and foaming to form a plate, wherein the heating temperature is 200-220 ℃, and heating is carried out for 45-50 minutes to ensure that chemical substances contained in the plate perform chemical reaction again, and the weight is unchanged and the volume is increased to 15-20 times of the original volume in the foaming process; and in the foaming process, inert gas is uniformly injected for slow expansion of air holes to form the plate, and the antibacterial property of the plate is 10-30 cm.

6) and (3) curing: curing the foamed board in a multi-section curing furnace for pore formation;

7) and (3) cooling: cooling to room temperature;

8) slicing: cutting the plate into a required shape and thickness;

9) cutting: cutting the cut plate to a required size and specification;

10) stamping forming: and (5) performing punch forming on the two sides of the cut plate by using a stamping die after the two sides of the cut plate are glued.

In step 1), the inert gas is argon.

In the step 6), a three-section curing furnace is adopted for curing, wherein the temperature of the first section is 120-130 ℃, the temperature of the second section is 100-110 ℃, and the temperature of the third section is 80-90 ℃.

compared with the prior art, the method has the following advantages:

1. The application provides a degradable packaging board adopts diatomaceous earth as the substrate of panel, and thermoplastic molding such as degradable macromolecular material alkyd, polyethylene glycol, EVA granule reunion, nontoxic pollution-free, biodegradable adds the antibiotic masterbatch that can take place chemical reaction with diatomaceous earth simultaneously, makes it produce great antibacterial ring, consequently has good bacteriostatic action.

2. the application provides a degradable packaging board, through add the EVA granule in panel, the panel made by it has soft good, shockproof, antiskid, advantage that compressive resistance is strong, suitable wide use, and but EVA granule biodegradable can not cause the injury to the environment when abandoning or burning.

3. The degradable packaging board provided by the application is mainly prepared from a foaming agent, EVA (ethylene vinyl acetate) particles, alkyd resin, polyethylene glycol, diatomite and an antibacterial agent, the materials are more in source and low in cost, and the manufacturing process of the degradable packaging board is simple, so that the total cost for preparing the degradable packaging board is low, and the degradable packaging board is suitable for mass production.

4. according to the degradable packaging board, the foaming agent, the EVA particles, the polyethylene glycol and the diatomite are used as main organic materials, the alkyd resin and the antibacterial agent are used as auxiliary materials, the degradable packaging board formed by thermoplastic, pre-foaming and stamping is small in density, good in rigidity, high in strength and high in chemical stability, and is buried in a mud land with the relative humidity of more than 50%, after the degradable packaging board is buried for 1-2 years, the degradable packaging board is seriously damaged and almost degraded, the degradation rate reaches more than 95%, a good degradation effect is achieved, complete degradation can be gradually achieved in the natural environment through landfill, and the purposes of low carbon, environmental protection and energy conservation are achieved.

[ detailed description ] embodiments

The present application will be further described with reference to specific examples.