CN110577686A - degradable packaging plate with antibacterial effect and preparation method thereof - Google Patents
degradable packaging plate with antibacterial effect and preparation method thereof Download PDFInfo
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- CN110577686A CN110577686A CN201910615639.3A CN201910615639A CN110577686A CN 110577686 A CN110577686 A CN 110577686A CN 201910615639 A CN201910615639 A CN 201910615639A CN 110577686 A CN110577686 A CN 110577686A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/46—Applications of disintegrable, dissolvable or edible materials
- B65D65/466—Bio- or photodegradable packaging materials
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0066—Use of inorganic compounding ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
- C08J9/102—Azo-compounds
- C08J9/103—Azodicarbonamide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2300/00—Characterised by the use of unspecified polymers
- C08J2300/16—Biodegradable polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2321/00—Characterised by the use of unspecified rubbers
- C08J2321/02—Latex
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/08—Copolymers of ethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2400/00—Characterised by the use of unspecified polymers
- C08J2400/16—Biodegradable polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2421/00—Characterised by the use of unspecified rubbers
- C08J2421/02—Latex
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/08—Copolymers of ethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2467/08—Polyesters modified with higher fatty oils or their acids, or with resins or resin acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2471/00—Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain; Derivatives of such polymers
- C08J2471/02—Polyalkylene oxides
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
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- Materials Engineering (AREA)
- Organic Chemistry (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Mechanical Engineering (AREA)
- Biological Depolymerization Polymers (AREA)
- Wrappers (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
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.
Description
[ 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.
Example 1
A preparation method of a degradable packaging board with an antibacterial effect comprises the following steps:
1) weighing and mixing raw materials: 15 parts of latex, 6 parts of foaming agent, 13 parts of EVA particles, 1 part of alkyd resin, 0.5 part of polyethylene glycol, 0.5 part of diatomite, 1 part of antibacterial agent and 1 part of compatilizer, and putting the materials into a stirring kettle to be uniformly mixed 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.
The resin adhesive film is pre-impregnated with the glass fiber cloth hot melt adhesive, the composite foaming plate is solidified on the upper abdomen of the glass fiber cloth hot melt adhesive and is vacuumized to form the degradable packaging plate with the antibacterial effect, and the antibacterial circle of the plate is 11.2cm through detection.
Example 2
A preparation method of a degradable packaging board with an antibacterial effect comprises the following steps:
1) weighing and mixing raw materials: 18 parts of latex, 8 parts of foaming agent, 16 parts of EVA particles, 1.5 parts of alkyd resin, 0.8 part of polyethylene glycol, 0.8 part of diatomite, 1.5 parts of antibacterial agent and 1.5 parts of compatilizer, and putting the materials into a stirring kettle for uniform mixing 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.
the resin adhesive film is pre-impregnated with the glass fiber cloth hot melt adhesive, the composite foaming plate is solidified on the upper abdomen of the glass fiber cloth hot melt adhesive and is vacuumized to form the degradable packaging plate with the antibacterial effect, and the antibacterial circle of the plate is 20.9cm through detection.
Example 3
a preparation method of a degradable packaging board with an antibacterial effect comprises the following steps:
1) weighing and mixing raw materials: 20 parts of latex, 10 parts of foaming agent, 20 parts of EVA particles, 2 parts of alkyd resin, 1 part of polyethylene glycol, 1 part of diatomite, 2 parts of antibacterial agent and 2 parts of compatilizer, and putting the materials into a stirring kettle to be uniformly mixed 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.
The resin adhesive film is pre-soaked with a glass fiber cloth hot melt adhesive, the upper and lower composite foaming plates of the glass fiber cloth hot melt adhesive are cured and vacuumized to form the degradable packaging plate with the antibacterial effect, and the inhibition zone of the plate is 29.8cm through detection. .
as can be seen from the above examples, the composition of example 3 is the most preferable.
The invention has the following advantages:
Firstly, diatomite is used as a base material of the plate, and then thermoplastic molding of degradable high polymer materials such as alkyd resin, polyethylene glycol and EVA particles is combined, so that the plate is non-toxic, pollution-free and biodegradable, and meanwhile, antibacterial master batch capable of chemically reacting with the diatomite is added, so that the plate can generate a larger antibacterial zone, and has a good antibacterial effect.
and secondly, various performances such as antibacterial property, wear resistance, toughness, rigidity, foamability and the like of the biodegradable material are obviously improved, compared with the existing similar products, the density is reduced by 10-20%, the low-temperature performance is reduced from-10 ℃ to-50 ℃, the heat resistance is improved by more than 25%, and the toughness is improved by more than 30%.
All the raw materials are biodegradable materials, do not contain polyolefin materials such as EPS, PE, PP, PVC and the like, can be completely degraded in nature, do not pollute the environment, are convenient to recycle, can be widely used for disposable products, daily necessities, medical packages, toys, film products and industrial product buffer packaging materials, and meet the requirement of circular economy.
And fourthly, the air holes are formed, and the air holes can be used for packaging products requiring good ventilation.
the above description is only for the purpose of illustrating the preferred embodiments of the present application and is not intended to limit the scope of the present application, which is within the scope of the present application, except that the same or similar principles and basic structures as the present application may be used.
Claims (7)
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 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910615639.3A CN110577686A (en) | 2019-07-09 | 2019-07-09 | degradable packaging plate with antibacterial effect and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910615639.3A CN110577686A (en) | 2019-07-09 | 2019-07-09 | degradable packaging plate with antibacterial effect and preparation method thereof |
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| CN110577686A true CN110577686A (en) | 2019-12-17 |
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| CN201910615639.3A Pending CN110577686A (en) | 2019-07-09 | 2019-07-09 | degradable packaging plate with antibacterial effect and preparation method thereof |
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| CN (1) | CN110577686A (en) |
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| CN113696554A (en) * | 2021-06-17 | 2021-11-26 | 苏州大上科高新材料有限公司 | Processing method of high-stability PE coating multifunctional oxford fabric |
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| US20100323135A1 (en) * | 2009-06-17 | 2010-12-23 | Chen Yaotian | Biodegradable environmentally-friendly material, a container, and their manufacturing methods |
| CN104312182A (en) * | 2014-09-24 | 2015-01-28 | 江西禾尔斯环保科技有限公司 | Degradable foam packaging material and its preparation method |
| CN104817798A (en) * | 2015-05-14 | 2015-08-05 | 北京汽车股份有限公司 | Manufacturing method of foamed board, foamed plate and automobile |
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Application publication date: 20191217 |