CN111978614A - Antibacterial and deodorant plastic for garbage can and preparation method thereof - Google Patents
Antibacterial and deodorant plastic for garbage can and preparation method thereof Download PDFInfo
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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- 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
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
- C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
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- 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
- C08J2323/06—Polyethene
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- 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
- C08J2423/06—Polyethene
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0806—Silver
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
Abstract
The application relates to the field of plastic materials, in particular to antibacterial and deodorant plastic for a garbage can and a preparation method thereof, wherein the antibacterial and deodorant plastic for the garbage can comprises the following components in parts by weight: 100 parts of high-density polyethylene resin, 8-12 parts of antibacterial master batch, 0.5-2 parts of lubricant, 0.1-0.3 part of ultraviolet absorbent and 0.1-0.3 part of antioxidant; the density of the high-density polyethylene resin is 0.957g/cm3The melt index is 7.3g/10 min; the antibacterial master batch is prepared by mixing polyethylene serving as carrier resin, a mixture of glass-carried silver and nano zinc oxide serving as an antibacterial component. The utility model provides an antibiotic deodorization plastics for garbage bin has antibiotic deodorization effect and is excellent and the good effect of processing property.
Description
Technical Field
The application relates to the field of plastic materials, in particular to antibacterial and deodorant plastic for a garbage can and a preparation method thereof.
Background
The garbage can is a common garbage collecting device in daily life and is mostly made of metal or plastic, and the plastic garbage can is widely applied due to the advantages of good mechanical property, light weight, low cost and the like. The garbage can is used for containing food, kitchen garbage, domestic waste and the like, and food waste in the garbage can is easy to decompose and rot under the action of bacteria and microorganisms at high temperature, so that bad smells such as hydrogen sulfide and ammonia are generated, the environment and the mood of people are influenced, and in order to solve the problem, garbage can materials with antibacterial and deodorizing functions are also produced at present.
In the prior art, a patent application with application publication number CN104910484A discloses an antibacterial PE plastic garbage can formula, which comprises the following components in parts by weight: polyethylene resin: 800-1200 parts; plasticizer: 20-50 parts; a stabilizer: 10-30 parts; antibacterial agents: 20-40 parts; glass fiber: 100-300 parts; inorganic nano-filler: 5-15 parts; pigment: 1-5 parts; antimicrobial stabilizer: 10-20 parts; wherein the antibacterial agent is zinc pyrithione, and the antibacterial agent stabilizer is hydrotalcite. Because the stability of the common antibacterial agent in the plastic modification process is poor, an antibacterial agent stabilizer needs to be added to improve the stability of the antibacterial agent in the plastic modification process; however, the antibiotic stabilizer hydrotalcite is similar to glass fiber and inorganic filler, and belongs to inorganic materials, and although the addition of hydrotalcite can improve the mechanical properties of the material, the addition of hydrotalcite also increases the specific gravity of the product, and the excessive addition of inorganic materials can cause the reduction of the fluidity of polyethylene when the polyethylene is melted, thereby affecting the processability of the product. Therefore, the current antibacterial deodorant plastics still have some problems.
Disclosure of Invention
To the not enough of prior art existence, the first aim at of this application provides an antibiotic deodorization plastics for garbage bin, and it has antibiotic deodorization effect excellence and the good advantage of working property.
The second purpose of the present application is to provide a preparation method of the antibacterial and deodorant plastic for trash cans, which has the advantages of simple preparation method and easy processing.
In order to achieve the first object, the present application provides the following technical solutions: the utility model provides an antibiotic deodorization plastics for garbage bin which characterized in that: 100 parts of high-density polyethylene resin, 8-12 parts of antibacterial master batch, 0.5-2 parts of lubricant, 0.1-0.3 part of ultraviolet absorbent and 0.1-0.3 part of antioxidant;
the density of the high-density polyethylene resin is 0.957g/cm3The melt index is 7.3g/10 min;
the antibacterial master batch is prepared by mixing polyethylene serving as carrier resin, a mixture of glass-carried silver and nano zinc oxide serving as an antibacterial component.
By adopting the technical scheme, the antibacterial agent is the antibacterial master batch taking polyethylene as carrier resin, and has good compatibility with high-density polyethylene resin, so that the plastic material can have good long-acting antibacterial property without additionally adding an antibacterial stabilizer; the high-density polyethylene has a high melt index, and the higher the melt index is, the better the fluidity of the high-density polyethylene in melting is, which indicates that the plastic material has good processing performance; through the cooperation of lubricant, ultraviolet absorbent and antioxidant for the plastic material of this application has better light-fast, oxidation resistance, thereby effectively prolongs its life.
Further, the lubricant is one of oleamide and erucamide.
By adopting the technical scheme, the oleamide and the erucamide are used as the lubricant in the polyethylene processing process, so that the melt viscosity of the resin particles during molding can be reduced, the fluidity of the resin particles can be improved, the dynamic and static friction coefficients of the surfaces of the products can be reduced, the surface glossiness of the products can be improved, and the processing performance of the products can be improved.
Further, the ultraviolet absorbent is 2-hydroxy-4-n-octoxybenzophenone.
By adopting the technical scheme, the 2-hydroxy-4-n-octoxybenzophenone is also called as an ultraviolet absorbent UV-531, has good compatibility with polyethylene resin, has the advantages of small volatility, good mobility and easy processing, and can effectively improve the light aging resistance of plastic products.
Further, the antioxidant is prepared by mixing tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester and tri [2, 4-di-tert-butylphenyl ] phosphite in a weight ratio of 3: 1.
By adopting the technical scheme, the tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester is also called antioxidant 1010, is a high molecular weight hindered phenol antioxidant and has the advantages of low volatility and difficult migration; the tris [2, 4-di-tert-butylphenyl ] phosphite is also called as antioxidant 168, has a good synergistic effect when used together with antioxidant 1010, can effectively prevent the phenomena of thermal oxidative degradation and yellowing of polyethylene during high-molecular processing, and is beneficial to improving the stability of product performance.
Further, 0.5-3 parts of deodorization slow release agent is also included.
By adopting the technical scheme, different deodorizers can be selected according to different types of garbage in the garbage can, so that gases such as sulfur, acid, ammonia and the like generated during garbage decay can be removed in a targeted manner.
Further, the deodorant is prepared by melting, extruding and granulating silicate minerals, zinc ricinoleate and microcrystalline cellulose which are used as core layers and polylactic acid and maleic anhydride grafted polyethylene which are used as coating layers.
Through adopting above-mentioned technical scheme, with silicate mineral, zinc ricinoleate, microcrystalline cellulose has fine deodorization effect as the deodorant of sandwich layer, and through polylactic acid, maleic anhydride grafting polyethylene is as the coating, not only can improve the compatibility of deodorant and polyethylene resin, but also can make the deodorization effect of deodorant have certain slow-release effect, when polylactic acid is decomposed gradually, the deodorization component of sandwich layer can expose gradually, thereby play fine deodorization effect, thereby make its plastic products have long-term deodorization effect.
Further, the density of the polylactic acid is 1.24g/cm3The melt index was 20g/10 min.
In order to achieve the second object, the present application provides the following technical solutions: a preparation method of antibacterial and deodorant plastic for a trash can comprises the following steps:
s1, uniformly mixing the high-density polyethylene resin, the antibacterial master batch, the lubricant, the ultraviolet absorbent and the antioxidant according to the proportion to obtain a mixture;
s2, placing the mixture in a double-screw extruder, wherein the temperature of a material cylinder of the double-screw extruder is 150-195 ℃, the temperature of a die head of the double-screw extruder is 155-165 ℃, and the rotating speed of a screw is 200-400r/min, and obtaining the antibacterial and deodorant plastic for the garbage can after melting, extruding and granulating.
By adopting the technical scheme, the raw materials are mixed, and then are melted, extruded and granulated, so that the preparation method is simple and easy to operate.
Further, the temperatures of all the zones of the double-screw extruder are respectively as follows: the first zone is 150-155 deg.C, the second zone is 160-170 deg.C, the third zone is 170-180 deg.C, the fourth zone is 180-185 deg.C, the fifth zone is 185-190 deg.C, the sixth zone is 175-180 deg.C, and the seventh zone is 165-170 deg.C.
By adopting the technical scheme, the raw materials can be fully melted and mixed at the temperature, and the stability of the product performance is improved.
Further, a deodorant is added into the S1, and the deodorant is prepared by the following method:
firstly, taking silicate minerals, soaking in dilute acid solution, washing and drying to obtain pretreated silicate minerals;
crushing the pretreated silicate mineral, and calcining the crushed silicate mineral at 600-800 ℃ for 3-5 hours to obtain calcined mineral powder;
mixing zinc ricinoleate, microcrystalline cellulose and absolute ethyl alcohol according to the weight ratio of 1-3:1:20, and stirring for 10-30min at the temperature of 80-90 ℃ to obtain a mixed solution;
adding calcined mineral powder accounting for 20-30% of the weight of the mixed solution into the mixed solution, soaking for 2-4h, and then performing suction filtration and drying to obtain a deodorant core layer;
taking polylactic acid and maleic anhydride grafted polyethylene as coating layers, mixing 40-60 parts by weight of deodorant core layer, 10-20 parts by weight of polylactic acid and 1-2 parts by weight of maleic anhydride grafted polyethylene, placing the mixture in a double-screw extruder, and melting, extruding and granulating to obtain the deodorant.
By adopting the technical scheme, after the silicate mineral is calcined after being treated by acid, the porous structure of the silicate mineral can be increased, and the adsorption capacity of the silicate mineral is improved; then mixing the calcined mineral powder with a mixed solution of zinc ricinoleate, microcrystalline cellulose and absolute ethyl alcohol, so that the zinc ricinoleate enters a porous structure of the calcined mineral powder, and the zinc ricinoleate is fixed by intermolecular hydrogen bonds to obtain a deodorant core layer; then mixing the deodorant core layer with polylactic acid and maleic anhydride grafted polyethylene, and coating the deodorant core layer with the polylactic acid to obtain a deodorizing sustained-release agent; then, by utilizing the air permeability and the degradable performance of the polylactic acid, when the effect of the antibacterial master batch is weakened, the polylactic acid gradually exposes the deodorant core layer due to the decomposition of bacteria and microorganisms, thereby playing a good deodorizing effect, and the deodorant component of the deodorant can be slowly released due to the slow release effect, so that the plastic product has a long-acting deodorizing effect.
In summary, compared with the prior art, the application has the following beneficial effects:
1. the high-density polyethylene resin with high melt index and the antibacterial master batch taking polyethylene as carrier resin are mixed, so that the prepared plastic product has good processing performance and long-acting antibacterial performance;
2. the deodorant can prolong the deodorization time of the plastic product, and when the antibacterial deodorization effect of the added antibacterial master batch is weakened, the deodorization component in the deodorant can be slowly released, so that the plastic product has a long-acting deodorization effect.
Detailed Description
The present application is described in further detail below.
Preparation example of deodorant
The silicate mineral is one or more of kaolinite, montmorillonite, zeolite, sepiolite and talc, and the silicate mineral of the following preparation examples is kaolinite; the polylactic acid is 3001D polylactic acid provided by NatureWorks of America, and has a density of 1.24g/cm3The melt index is 20g/10 min; the maleic anhydride grafted polyethylene is selected from maleic anhydride grafted polyethylene with the brand number P-01 provided by Guangzhou modest and scientific and technological Co.
Preparation example 1 of deodorant: firstly, taking kaolinite, soaking the kaolinite in a 5 wt% dilute hydrochloric acid solution for 3 hours, then taking out the kaolinite, washing the kaolinite with clean water, and drying the kaolinite for 2 hours at the temperature of 60 ℃ to obtain pretreated kaolinite;
crushing the pretreated kaolinite to 50 meshes, and calcining the crushed kaolinite for 3 hours at the temperature of 600 ℃ to obtain calcined mineral powder;
mixing zinc ricinoleate, microcrystalline cellulose and absolute ethyl alcohol according to the weight ratio of 1:1:20, and stirring for 10min at the temperature of 80 ℃ to obtain a mixed solution;
adding calcined mineral powder accounting for 20% of the weight of the mixed solution into the mixed solution, and soaking for 2 hours; then removing the ethanol solvent by suction filtration to obtain a precipitate, drying the precipitate at the temperature of 120 ℃ for 4 hours, and grinding the precipitate to 400 meshes to obtain a deodorant core layer;
taking polylactic acid and maleic anhydride grafted polyethylene as coating layers, taking 40kg of deodorant core layer, 10kg of polylactic acid and 1kg of maleic anhydride grafted polyethylene, mixing the materials, placing the mixture in a double-screw extruder, wherein the temperature of each zone of the double-screw extruder is 160 ℃ in the first zone, 165 ℃ in the second zone, 175 ℃ in the third zone, 185 ℃ in the fourth zone, 195 ℃ in the fifth zone, 185 ℃ in the sixth zone, 175 ℃ in the seventh zone, 165 ℃ in the die head and 200r/min in the screw rotation speed, and melting, extruding and granulating to obtain the deodorant.
Preparation example 2 of deodorant: firstly, taking kaolinite, soaking the kaolinite in a 5 wt% dilute hydrochloric acid solution for 3 hours, then taking out the kaolinite, washing the kaolinite with clean water, and drying the kaolinite for 2 hours at the temperature of 60 ℃ to obtain pretreated kaolinite;
crushing the pretreated kaolinite to 50 meshes, and calcining the crushed kaolinite for 4 hours at the temperature of 700 ℃ to obtain calcined mineral powder;
mixing zinc ricinoleate, microcrystalline cellulose and absolute ethyl alcohol according to the weight ratio of 2:1:20, and stirring at 85 ℃ for 20min to obtain a mixed solution;
adding 25% of calcined ore powder by weight of the mixed solution into the mixed solution, and soaking for 3 hours; then removing the solvent by suction filtration to obtain a precipitate, drying the precipitate at the temperature of 120 ℃ for 4 hours, and grinding the precipitate to 400 meshes to obtain a deodorant core layer;
taking polylactic acid and maleic anhydride grafted polyethylene as coating layers, taking 50kg of deodorant core layer, 15kg of polylactic acid and 1.5kg of maleic anhydride grafted polyethylene, mixing the materials, placing the mixture in a double-screw extruder, wherein the temperature of each zone of the double-screw extruder is 160 ℃ in the first zone, 165 ℃ in the second zone, 175 ℃ in the third zone, 185 ℃ in the fourth zone, 195 ℃ in the fifth zone, 185 ℃ in the sixth zone, 175 ℃ in the seventh zone, 165 ℃ in the die head and 200r/min in the screw rotation speed, and melting, extruding and granulating to obtain the deodorant.
Preparation example 3 of deodorant: firstly, taking kaolinite, soaking the kaolinite in a 5 wt% dilute hydrochloric acid solution for 3 hours, then taking out the kaolinite, washing the kaolinite with clean water, and drying the kaolinite for 2 hours at the temperature of 60 ℃ to obtain pretreated kaolinite;
crushing the pretreated kaolinite to 50 meshes, and calcining the crushed kaolinite at the temperature of 800 ℃ for 5 hours to obtain calcined mineral powder;
mixing zinc ricinoleate, microcrystalline cellulose and absolute ethyl alcohol according to the weight ratio of 3:1:20, and stirring for 30min at the temperature of 90 ℃ to obtain a mixed solution;
adding 30 percent of calcined ore powder by weight of the mixed solution into the mixed solution, and soaking for 4 hours; then removing the solvent by suction filtration to obtain a precipitate, drying the precipitate at the temperature of 120 ℃ for 4 hours, and grinding the precipitate to 400 meshes to obtain a deodorant core layer;
taking polylactic acid and maleic anhydride grafted polyethylene as coating layers, taking 60kg of deodorant core layer, 20kg of polylactic acid and 2kg of maleic anhydride grafted polyethylene, mixing the materials, placing the mixture in a double-screw extruder, wherein the temperature of each zone of the double-screw extruder is 160 ℃ in the first zone, 165 ℃ in the second zone, 175 ℃ in the third zone, 185 ℃ in the fourth zone, 195 ℃ in the fifth zone, 185 ℃ in the sixth zone, 175 ℃ in the seventh zone, 165 ℃ in the die head and 200r/min in the screw rotation speed, and melting, extruding and granulating to obtain the deodorant.
Preparation example 4 of deodorant: the difference between the preparation example and the deodorant preparation example 1 is that in the step (II), the pretreated kaolinite is crushed into 50 meshes and is not calcined to obtain uncalcined mineral powder; replacing the calcined ore powder in the step (IV) with the same amount of uncalcined ore powder.
Preparation example 5 of deodorant: the difference between the preparation example and the preparation example 1 of the deodorant is that the preparation example does not comprise the step (c), and the step (c) is to grind the calcined mineral powder to 400 meshes after drying the calcined mineral powder for 4 hours at the temperature of 120 ℃ to obtain the deodorant core layer.
Preparation example 6 of deodorant: the difference between the preparation example and the preparation example 1 of the deodorant is that the fifth step, namely the deodorant core layer of the fourth step, is not included.
Examples
The high density polyethylene resin in the following examples was selected from HDPE supplied by the Mount petrochemical industry, model DEDM8008, having a density of 0.9566g/cm3The melt index (190 ℃, 2.16kg) was 7.3g/10 min; the antibacterial master batch is selected from HX antibacterial master batches provided by Huixin chemical technology Co., Ltd, Zhongshan City, the antibacterial master batches take PE as a carrier, and the antibacterial component of the antibacterial master batches is a mixture of glass-carried silver and zinc oxide; adding silver ions and zinc oxide into a glass carrier by adopting a chemical physical method, then carrying out high-temperature melting, water distribution, grading and other steps to prepare silver-series inorganic antibacterial agent powder, and then carrying out melt blending on the silver-series inorganic antibacterial agent powder and a polyethylene carrier to prepare antibacterial master batches, wherein the silver content is0.5 percent and the zinc content is 3.0 percent.
Example 1: the antibacterial and deodorant plastic for the garbage can is prepared by the following method:
s1, uniformly mixing 100kg of high-density polyethylene resin, 8kg of antibacterial master batch, 0.5kg of lubricant, 0.1kg of ultraviolet absorbent and 0.1kg of antioxidant to obtain a mixture; wherein the lubricant is oleamide; the ultraviolet absorbent is 2-hydroxy-4-n-octoxy benzophenone; the antioxidant is formed by mixing tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester and tri [2, 4-di-tert-butylphenyl ] phosphite in a weight ratio of 3: 1;
s2, placing the mixture in a double-screw extruder, wherein the temperature of each area of the double-screw extruder is as follows: the antibacterial and deodorant plastic for the garbage can is obtained by melting, extruding and granulating the materials at the first zone of 150 ℃, the second zone of 160 ℃, the third zone of 170 ℃, the fourth zone of 180 ℃, the fifth zone of 185 ℃, the sixth zone of 175 ℃ and the seventh zone of 165 ℃, the die head temperature of 155 ℃ and the screw rotation speed of 200 r/min.
Example 2: the antibacterial and deodorant plastic for the garbage can is prepared by the following method:
s1, uniformly mixing 100kg of high-density polyethylene resin, 10kg of antibacterial master batch, 1kg of lubricant, 0.2kg of ultraviolet absorbent and 0.2kg of antioxidant to obtain a mixture; wherein the lubricant is erucamide; the ultraviolet absorbent is 2-hydroxy-4-n-octoxy benzophenone; the antioxidant is formed by mixing tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester and tri [2, 4-di-tert-butylphenyl ] phosphite in a weight ratio of 3: 1;
s2, placing the mixture in a double-screw extruder, wherein the temperature of each area of the double-screw extruder is as follows: the antibacterial and deodorant plastic for the garbage can is obtained by melting, extruding and granulating the materials in a first zone of 152 ℃, a second zone of 165 ℃, a third zone of 175 ℃, a fourth zone of 182 ℃, a fifth zone of 187 ℃, a sixth zone of 177 ℃, a seventh zone of 167 ℃, a die head temperature of 160 ℃ and a screw rotation speed of 300 r/min.
Example 3: the antibacterial and deodorant plastic for the garbage can is prepared by the following method:
s1, uniformly mixing 100kg of high-density polyethylene resin, 12kg of antibacterial master batch, 2kg of lubricant, 0.3kg of ultraviolet absorbent and 0.3kg of antioxidant to obtain a mixture; wherein the lubricant is oleamide; the ultraviolet absorbent is 2-hydroxy-4-n-octoxy benzophenone; the antioxidant is formed by mixing tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester and tri [2, 4-di-tert-butylphenyl ] phosphite in a weight ratio of 3: 1;
s2, placing the mixture in a double-screw extruder, wherein the temperature of each area of the double-screw extruder is as follows: the antibacterial and deodorant plastic for the garbage can is obtained by melting, extruding and granulating the materials at the first zone of 155 ℃, the second zone of 170 ℃, the third zone of 180 ℃, the fourth zone of 185 ℃, the fifth zone of 190 ℃, the sixth zone of 180 ℃ and the seventh zone of 170 ℃, the die head temperature of 165 ℃ and the screw rotation speed of 400 r/min.
Example 4: this example differs from example 1 in that 0.5kg of a deodorant selected from the group consisting of Kesimon SR-D10N deodorizers available from Tokya synthetic company, the main component of which is zinc oxide, was also added to S1.
Example 5: this example differs from example 1 in that 2kg of a deodorant selected from the group consisting of Kesimon SR-D10N deodorizers available from Tokya synthetic company, the main component of which is zinc oxide, was also added to S1.
Example 6: this example differs from example 1 in that 3kg of a deodorant selected from the group consisting of Kesimon SR-D10N deodorizers available from Tokya synthetic company, the main component of which is zinc oxide, was also added to S1.
Example 7: this example differs from example 5 in that the deodorant was selected from Kasemon NS-10 deodorant supplied by Toyo Synthesis K.K., the main component of which was zirconia.
Example 8: this example is different from example 5 in that the deodorant was prepared from preparation example 1 of a deodorant.
Example 9: this example is different from example 5 in that the deodorant was prepared from preparation example 2 of a deodorant.
Example 10: this example is different from example 5 in that the deodorant was prepared from preparation example 3 of a deodorant.
Example 11: this example is different from example 6 in that the deodorant was prepared from preparation example 1 of a deodorant.
Example 12: this example is different from example 5 in that the deodorant includes 1kg of kesimon SR-D10N deodorant and 1kg of deodorant prepared by preparation example 1 of deodorant.
Example 13: this example differs from example 5 in that the deodorant contained 1kg of kesimon NS-10 deodorant and 1kg of deodorant prepared by preparation example 1 of deodorant.
Example 14: this example is different from example 5 in that the deodorant was prepared from preparation example 4 of a deodorant.
Example 15: this example is different from example 5 in that the deodorant was prepared from preparation example 5 of a deodorant.
Example 16: this example is different from example 5 in that the deodorant was prepared from preparation example 6 of a deodorant.
Example 17: this example is different from example 6 in that the deodorant was prepared from preparation example 6 of a deodorant.
Comparative example
Comparative example using the patent application publication No. CN104910484A, an example of an antimicrobial PE plastic bucket formulation, which is 900g of polyethylene resin; 30g of diisononyl phthalate; 20g of calcium zinc stabilizer; 25g of zinc pyrithione; 200g of glass fiber; 10g of nano silicon dioxide; 5g of pigment; 15g of hydrotalcite. The garbage can is manufactured by the following method: weighing the raw materials according to the weight part ratio of the components, adding all the raw materials except the glass fiber into a charging barrel, uniformly mixing, heating and melting, putting the weighed glass fiber into a mold, then quickly injecting the slurry which is subjected to mixing and melting into the mold of the closed garbage can, maintaining the pressure, performing injection molding, opening the mold, taking out a product, and properly trimming to obtain the plastic garbage can.
Performance testing
The deodorizing plastic prepared in the embodiment is placed in an injection molding machine, various parameters of the injection molding machine are adjusted, the temperature of a charging barrel of the injection molding machine is 230 ℃, the temperature of a nozzle is 200 ℃, the temperature of a mold is 60 ℃, the injection molding speed is 220mm/s, the injection molding pressure is 5MPa, the pressure maintaining pressure is 3MPa, and the injection time is 60s, so that the plastic barrel is obtained by injection molding.
The materials of examples 1 to 17 and comparative example were used as test samples, and their properties were measured in the following manner, and the results are shown in Table 1.
Melt index: the test is carried out according to the method in GB/T3682.1-2018 method for the melt mass flow rate and the melt volume flow rate of the plastic thermoplastic plastics; the larger the melt index, the more fluid the material is in the molten state, and the better the processability.
Tensile strength: determination of tensile Properties according to GB/T1040.2-2006 section 2: the tests were carried out by the methods described in test conditions for molded and extruded plastics.
Elongation at break: determination of tensile Properties according to GB/T1040.2-2006 section 2: the tests were carried out by the methods described in test conditions for molded and extruded plastics.
Impact strength of the simply supported beam: according to GB/T1043.1-2008' determination of impact performance of plastic simply supported beam part 1: the method in non-instrumented impact test.
Antibacterial property: according to QB/T2591-2003A 'antibacterial plastic antibacterial performance test method and antibacterial effect', the bacteria for detection: escherichia coli (Escherichia coli) ATCC 25922, Staphylococcus aureus (Staphylococcus aureus) ATCC 6538.
Deodorization performance: putrid vegetables are used as garbage samples and are placed in the garbage cans of the embodiment and the comparative example, when garbage is just placed in the garbage cans and the garbage is placed in the garbage cans for 6 hours, a portable ammonia hydrogen sulfide detector with the model number of PNT400-NH3/H2S, which is provided by Shenzhen Ruikei technology Limited, is adopted to detect the concentration of malodorous gases (ammonia and hydrogen sulfide) in the garbage cans, and the change rate of the concentration of the malodorous gases in the garbage cans is calculated, wherein F ═ is (F ═ A (F ═ F-2-F1)/F1×100％，F1Foul gas when garbage is just put into the garbage canConcentration of (A), F2The concentration of the malodorous gas after the garbage is put into the garbage can for 6 hours.
Long-acting deodorization performance: placing the garbage can in a condition of 25 ℃ and 65% RH humidity for 3 months, then placing the garbage can in distilled water of 50 ℃ for soaking for 48h, then placing the garbage can in a temperature of (50 +/-2) DEG C, and drying for 48h to obtain a test sample; repeating the above test method for deodorization performance, respectively testing the concentration of malodorous gas just after the garbage is put into the garbage can and 6 hours after the garbage is filled into the garbage can, and calculating the change rate of the concentration of malodorous gas in the garbage can, wherein F ═ F (F ═ is4-F3)/F3×100％，F3The concentration of malodorous gas F when the garbage is just put into the garbage can4The concentration of the malodorous gas after the garbage is put into the garbage can for 6 hours.
TABLE 1 test table for performance of plastic materials in examples and comparative examples
As can be seen from the data in Table 1, compared with the comparative example, the deodorant plastic prepared by the invention has better processing performance, better mechanical property and excellent antibacterial property, and can inhibit the decomposition of bacteria and microorganisms on rotten foods and reduce the increase of malodorous gases to a certain extent due to the good antibacterial property.
As can be seen from the comparison between examples 1 and 3, as the amount of the antibacterial masterbatch is increased, the antibacterial performance of the material is gradually enhanced, and the melt index of the material is not significantly changed, which indicates that the antibacterial masterbatch has good compatibility with polyethylene, and the increase of the amount of the antibacterial masterbatch in the range of the amount of the antibacterial masterbatch does not cause significant changes in the processability and mechanical properties of the material.
As can be seen from comparison between examples 1 and 4-6, the addition of the SR-D10N deodorant has a good effect of removing hydrogen sulfide gas, and the deodorization effect is better as the amount of the deodorant is increased, but the melt index and the mechanics of the material are slightly reduced. As can be seen from the comparison of example 5 with example 7, the addition of the NS-10 deodorant had a very good effect of removing ammonia-based gases.
As is clear from comparison between example 5 and examples 8 to 10, the deodorant of the preparation example of the present application has a superior effect of removing both hydrogen sulfide type gas and ammonia type gas, and although the deodorizing effect is slightly lower than that of SR-D10N deodorant and that of NS-10 deodorant in a short period of time, it has an outstanding long-lasting deodorizing effect as compared with SR-D10N deodorant and that of NS-10 deodorant.
The comparison between the example 8 and the example 11 shows that the melt index and the mechanical property of the material are not obviously changed with the increase of the dosage of the deodorant, which indicates that the deodorant prepared by the application has good compatibility with the polyethylene material, and the increase of the dosage of the deodorant in the dosage range of the application does not cause the obvious change of the processing property and the mechanical property of the material.
As can be seen from comparison among examples 5, 7, 8, 12 and 13, when the deodorant of the present invention is used in combination with SR-D10N deodorant or NS-10 deodorant, it has excellent short-term and long-term effects and a good overall effect without changing the processability and mechanical properties of the material.
The deodorant of example 14 was prepared from preparation example 4 of a deodorant in which the pretreated kaolinite powder was not subjected to calcination treatment; the deodorant of example 15 was prepared from preparation example 5 of a deodorant in which the calcined ore powder was not treated with a mixed solution of zinc ricinoleate, microcrystalline cellulose and absolute ethyl alcohol. The comparison of examples 5, 8, 14 and 15 shows that the short-term deodorizing performance and the long-term deodorizing performance of the material are obviously poor, and the preparation method of the deodorant of the present application has synergistic effect of the steps, so that the deodorizing effect can be remarkably improved.
The deodorant of example 16 was prepared from preparation example 6 of a deodorant, in which the deodorant core layer was not subjected to coating treatment; as is clear from comparison of examples 5, 8 and 16, the short-term deodorizing rate can be improved but the long-term deodorizing ability is remarkably reduced when the deodorant is not coated.
It is understood from comparison among examples 11, 16 and 17 that the deodorant without being coated is reduced in compatibility with the polyethylene material and thus in processability and mechanical properties when the amount of the deodorant is increased.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (9)
1. The utility model provides an antibiotic deodorization plastics for garbage bin which characterized in that: the paint comprises the following components in parts by weight: 100 parts of high-density polyethylene resin, 8-12 parts of antibacterial master batch, 0.5-2 parts of lubricant, 0.1-0.3 part of ultraviolet absorbent and 0.1-0.3 part of antioxidant;
the density of the high-density polyethylene resin is 0.957g/cm3The melt index is 7.3g/10 min;
the antibacterial master batch is prepared by mixing polyethylene serving as carrier resin, a mixture of glass-carried silver and nano zinc oxide serving as an antibacterial component.
2. The antibacterial and deodorant plastic for trash cans according to claim 1, wherein: the lubricant is one of oleamide and erucamide.
3. The antibacterial and deodorant plastic for trash cans according to claim 1, wherein: the ultraviolet absorbent is 2-hydroxy-4-n-octoxy benzophenone.
4. The antibacterial and deodorant plastic for trash cans according to claim 1, wherein: the antioxidant is prepared by mixing tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester and tri [2, 4-di-tert-butylphenyl ] phosphite in a weight ratio of 3: 1.
5. The antibacterial and deodorant plastic for trash cans according to claim 1, wherein: also comprises 0.5-3 parts of deodorant.
6. The antibacterial and deodorant plastic for trash cans according to claim 5, wherein: the deodorant is prepared by melting, extruding and granulating silicate minerals, zinc ricinoleate and microcrystalline cellulose which are used as core layers and polylactic acid and maleic anhydride grafted polyethylene which are used as coating layers.
7. A preparation method of antibacterial and deodorant plastic for a garbage can is characterized by comprising the following steps: the method comprises the following steps:
s1, uniformly mixing the high-density polyethylene resin, the antibacterial master batch, the lubricant, the ultraviolet absorbent and the antioxidant according to the proportion to obtain a mixture;
s2, placing the mixture in a double-screw extruder, wherein the temperature of a material cylinder of the double-screw extruder is 150-195 ℃, the temperature of a die head of the double-screw extruder is 155-165 ℃, and the rotating speed of a screw is 200-400r/min, and obtaining the antibacterial and deodorant plastic for the garbage can after melting, extruding and granulating.
8. The method for preparing the antibacterial and deodorant plastic for the trash can according to claim 7, wherein the method comprises the following steps: the temperature of each zone of the double-screw extruder is respectively as follows: the first zone is 150-155 deg.C, the second zone is 160-170 deg.C, the third zone is 170-180 deg.C, the fourth zone is 180-185 deg.C, the fifth zone is 185-190 deg.C, the sixth zone is 175-180 deg.C, and the seventh zone is 165-170 deg.C.
9. The method for preparing the antibacterial and deodorant plastic for the trash can according to claim 7, wherein the method comprises the following steps: s1, a deodorant is also added, and the deodorant is prepared by the following method:
firstly, taking silicate minerals, soaking in dilute acid solution, washing and drying to obtain pretreated silicate minerals;
crushing the pretreated silicate mineral, and calcining the crushed silicate mineral at 600-800 ℃ for 3-5 hours to obtain calcined mineral powder;
mixing zinc ricinoleate, microcrystalline cellulose and absolute ethyl alcohol according to the weight ratio of 1-3:1:20, and stirring for 10-30min at the temperature of 80-90 ℃ to obtain a mixed solution;
adding calcined mineral powder accounting for 20-30% of the weight of the mixed solution into the mixed solution, soaking for 2-4h, and then performing suction filtration and drying to obtain a deodorant core layer;
taking polylactic acid and maleic anhydride grafted polyethylene as coating layers, mixing 40-60 parts by weight of deodorant core layer, 10-20 parts by weight of polylactic acid and 1-2 parts by weight of maleic anhydride grafted polyethylene, placing the mixture in a double-screw extruder, and melting, extruding and granulating to obtain the deodorant.
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