CN112143153A - Refrigerator liner, refrigerator liner material and preparation method thereof - Google Patents
Refrigerator liner, refrigerator liner material and preparation method thereof Download PDFInfo
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- CN112143153A CN112143153A CN202011067671.1A CN202011067671A CN112143153A CN 112143153 A CN112143153 A CN 112143153A CN 202011067671 A CN202011067671 A CN 202011067671A CN 112143153 A CN112143153 A CN 112143153A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/04—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to rubbers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- 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
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention provides a refrigerator liner, a refrigerator liner material and a preparation method thereof. The refrigerator liner material comprises the following components in parts by weight80-90 parts of impact-resistant polystyrene resin, 8-15 parts of polyethylene, 0.3-0.6 part of antibacterial agent, 7-12 parts of compatibilizer, 5-10 parts of flexibilizer, 0.1-1 part of antioxidant, 0.1-1 part of lubricant and 0.3-1 part of colorant, wherein the antibacterial agent is an inorganic antibacterial agent, the particle size of rubber in the high-impact polystyrene resin is more than 5 mu m, the melt index is 1-5g/10min, the elongation is more than 60%, and the notch impact strength is 12-14KJ/m2. The refrigerator liner material has the effects of antibiosis and sterilization, and has good environmental stress resistance and chemical corrosion resistance.
Description
Technical Field
The invention relates to the technical field of refrigerator liners, in particular to a refrigerator liner, a refrigerator liner material and a preparation method thereof.
Background
The refrigerator becomes a necessary household appliance in daily life, great convenience is provided for the life of a user, the requirement of the user on the functions of the refrigerator is higher and higher along with the improvement of the living standard, and on the basis of ordinary fresh-keeping refrigeration, the user hopes that the inside of the refrigerator can be kept in a cleaner environment for a long time, so that frequent internal cleaning is avoided, and the inside of the refrigerator is required to have automatic antibacterial or sterilizing capability.
Disclosure of Invention
The invention aims to provide an antibacterial refrigerator liner material, a preparation method thereof and a refrigerator liner using the refrigerator liner material, so as to solve the problems in the prior art.
In order to solve the technical problem, the invention provides a refrigerator liner material which comprises the following components in parts by weight:
wherein the antibacterial agent is an inorganic antibacterial agent, the particle size of rubber in the high-impact polystyrene resin is more than 5 mu m, the melt index is 1-5g/10min, the elongation is more than 60%, and the notch impact strength is 12-14KJ/m2。
In one embodiment, the antimicrobial agent comprises at least one of a silver ion antimicrobial agent and a zinc ion antimicrobial agent.
In one embodiment, the polyethylene is a low density polyethylene having a melt index of 1 to 4g/10 min.
In one embodiment, the compatibilizer comprises at least one of styrene-maleic anhydride copolymer (SMA), methyl methacrylate-butadiene-styrene terpolymer (MBS), styrene-ethylene-propylene-styrene block copolymer, maleic anhydride graft.
In one embodiment, the toughening agent includes at least one of a styrene-butadiene-styrene block copolymer (SBS), a styrene-butylene/butadiene-styrene copolymer (SEBS), a K-gum, a polyolefin elastomer (POE), and a methyl methacrylate-butadiene-styrene copolymer (MBS).
In one embodiment, the antioxidant comprises a primary antioxidant and a secondary antioxidant, and the weight ratio of the primary antioxidant to the secondary antioxidant is 2: 1.
In one embodiment, the primary antioxidant is antioxidant 1010 and the secondary antioxidant is antioxidant 168.
In one embodiment, the lubricant comprises at least one of paraffin wax, chlorinated paraffin wax, Ethylene Bis Stearamide (EBS), zinc stearate, low molecular weight polyethylene.
The invention also provides a preparation method of the refrigerator liner material, which comprises the following steps:
weighing 80-90 parts by weight of high impact polystyrene resin, 8-15 parts by weight of polyethylene, 0.3-0.6 part by weight of antibacterial agent, 7-12 parts by weight of compatibilizer, 5-10 parts by weight of toughening agent, 0.1-1 part by weight of antioxidant, 0.1-1 part by weight of lubricant and 0.3-1 part by weight of colorant, and placing the materials in a high-speed mixer; the antibacterial agent is an inorganic antibacterial agent, the particle size of rubber in the high-impact polystyrene resin is more than 5 mu m, the melt index is 1-5g/10min, the elongation is more than 60%, and the notch impact strength is 12-14KJ/m2；
Uniformly stirring by a high-speed mixer, wherein the rotating speed of the mixer is 1000-;
starting the double-screw extruder, feeding the mixture into the extruder, mixing and extruding, and setting the temperature ranges of the cylinder of the double-screw extruder from the feed inlet to the head sections as follows: the refrigerator inner container material is obtained by fully melting, compounding, extruding, granulating and drying materials under the conditions of shearing, mixing and conveying of a screw, wherein the first zone is 190-fold, the second zone is 210-fold, the third zone is 220-fold, the temperature is 230 ℃ 220-fold, the fifth zone is 210-fold, the sixth zone is 200-fold, the seventh zone is 190-fold, the eighth zone is 220-fold, the ninth zone is 220-fold, the temperature is 230 ℃ and the tenth zone is 200-fold, the length-diameter ratio of a double-screw extruder is 40-44:1, and the rotating speed of the screw is 500-fold 600 r/min.
The invention also provides a refrigerator liner, which is made of the refrigerator liner material or the refrigerator liner material prepared by the method.
According to the technical scheme, the invention has the advantages and positive effects that:
the refrigerator liner material disclosed by the invention has good antibacterial and bactericidal effects, and also has good environmental stress resistance and chemical corrosion resistance. And the crystallization speed of the refrigerator liner material is reduced, and the whitening phenomenon in the forming process is avoided.
Drawings
FIG. 1 is a flow chart of the preparation method of the refrigerator liner material of the present invention.
Detailed Description
Exemplary embodiments that embody features and advantages of the invention are described in detail below in the specification. It is to be understood that the invention is capable of other embodiments and that various changes in form and details may be made therein without departing from the scope of the invention and the description and drawings are to be regarded as illustrative in nature and not as restrictive.
For further explanation of the principles and construction of the present invention, reference will now be made in detail to the preferred embodiments of the present invention, which are illustrated in the accompanying drawings.
The invention provides a refrigerator liner which has an antibacterial and bactericidal effect and also has good environmental stress resistance and chemical corrosion resistance.
The refrigerator liner material and the preparation method thereof are provided to realize the excellent performances of the refrigerator liner material such as antibiosis and sterilization, and the refrigerator liner material and the preparation method thereof are described in detail below.
Specifically, the refrigerator liner material comprises, by weight, 80-90 parts of high impact polystyrene resin, 8-15 parts of polyethylene, 0.3-0.6 part of an antibacterial agent, 7-12 parts of a compatibilizer, 5-10 parts of a toughening agent, 0.1-1 part of an antioxidant, 0.1-1 part of a lubricant and 0.3-1 part of a colorant, wherein the antibacterial agent is an inorganic antibacterial agent.
Among them, high impact polystyrene resin (HIPS resin) is a mixture of styrene polymer and butadiene/styrene graft copolymer, styrene polymer PS is a resin phase, and butadiene/styrene graft copolymer is a rubber phase. Specifically, the high impact polystyrene resin has rubber grain size greater than 5 micron, melt index of 1-5g/10min, elongation greater than 60% and notched impact strength of 12-14KJ/m2. The arrangement that the particle size of the rubber is larger than 5 mu m can improve the environmental stress resistance of the whole refrigerator liner material. The high impact polystyrene resin has the advantages of large elongation, high impact strength and good extensibility due to the arrangement of the melt index, and is suitable for extrusion grade.
In this example, the high impact polystyrene was an extruded plate grade HIPS resin. For example: dadada HIPS8265, qimei HIPS88sf, yangba HIPS2720, and shengxi HIPS 1173.
The polyethylene is low density polyethylene with a melt index of 1-4g/10 min. The setting of the melt index of the polyethylene not only enables the polyethylene to be suitable for extrusion, but also can improve the environmental stress resistance and the impact strength of the whole refrigerator liner material.
The antibacterial agent is inorganic antibacterial agent. Specifically, the antibacterial agent may be a silver ion antibacterial agent or a zinc ion antibacterial agent, or a mixture of a silver ion antibacterial agent and a zinc ion antibacterial agent. The inorganic antibacterial agent has the characteristics of good chemical stability, durable antibiosis, good high temperature resistance and the like. The silver and zinc ions can effectively inhibit or kill microorganisms.
The compatibilizer comprises at least one of styrene-maleic anhydride copolymer (SMA), methyl methacrylate-butadiene-styrene terpolymer (MBS), styrene-ethylene-propylene-styrene block copolymer and maleic anhydride graft.
The toughening agent comprises at least one of styrene-butadiene-styrene block copolymer (SBS), styrene-butylene/butadiene-styrene copolymer (SEBS), K glue, polyolefin elastomer (POE) and methyl methacrylate-butadiene-styrene copolymer (MBS). Wherein the K-gum is also called K-resin and is styrene-butadiene copolymer (SB).
The antioxidant comprises a main antioxidant and an auxiliary antioxidant, and the weight ratio of the main antioxidant to the auxiliary antioxidant is 2: 1. The primary antioxidant is antioxidant 1010, and the secondary antioxidant is antioxidant 168.
The lubricant comprises at least one of paraffin wax, chlorinated paraffin wax, Ethylene Bis Stearamide (EBS), zinc stearate and low molecular weight polyethylene.
The colorant may be selected as desired. For example, when a grey refrigerator inner container is needed, a grey colorant is selected, and when other refrigerator inner containers with other colors are needed, a colorant with the corresponding color is selected.
In order to prepare the refrigerator liner with antibacterial performance, after the antibacterial agent is added into the HIPS resin, a whitening phenomenon is easy to occur in the forming process of the refrigerator liner, and particularly, the refrigerator liner with the antibacterial performance is more obvious. In order to solve the whitening problem, the inventor of the application adds polyethylene and a compatibilizer to slow down the crystallization speed of PS, thereby avoiding the whitening phenomenon. In addition, the polyethylene has good extensibility and is suitable for extrusion process.
Therefore, the refrigerator liner material disclosed by the invention not only has antibacterial and bactericidal properties, but also has good environmental stress resistance and chemical corrosion resistance. And the crystallization speed of the refrigerator liner material is lower than that of the common PS material, the stress borne by the refrigerator liner material during molding can be reduced, and the phenomenon of whitening during plastic suction molding is avoided.
Referring to fig. 1, fig. 1 shows a flow chart of a preparation method of a refrigerator liner material of the present invention, the preparation method of the refrigerator liner material comprises the following steps:
s1, weighing 80-90 parts by weight of high impact polystyrene resin, 8-15 parts by weight of polyethylene, 0.3-0.6 part by weight of antibacterial agent, 7-12 parts by weight of compatibilizer, 5-10 parts by weight of toughening agent, 0.1-1 part by weight of antioxidant, 0.1-1 part by weight of lubricant and 0.3-1 part by weight of colorant, and placing the materials in a high-speed mixer.
Wherein the antibacterial agent is an inorganic antibacterial agent. The high impact polystyrene resin has rubber grain size greater than 5 micron, melt index of 1-5g/10min, elongation greater than 60% and notched impact strength of 12-14KJ/m2。
S2, uniformly stirring by a high-speed mixer, wherein the rotating speed of the mixer is 1000-1200r/min, and mixing for 5-10 minutes at a high speed to obtain a uniform mixture.
S3, starting the double-screw extruder, feeding the mixture into the extruder, mixing and extruding, and setting the temperature ranges of all sections of the cylinder of the double-screw extruder from the feed inlet to the machine head as follows: the refrigerator inner container material is obtained by fully melting, compounding, extruding, granulating and drying materials under the conditions of shearing, mixing and conveying of a screw, wherein the first zone is 190-fold, the second zone is 210-fold, the third zone is 220-fold, the temperature is 230 ℃ 220-fold, the fifth zone is 210-fold, the sixth zone is 200-fold, the seventh zone is 190-fold, the eighth zone is 220-fold, the ninth zone is 220-fold, the temperature is 230 ℃ and the tenth zone is 200-fold, the length-diameter ratio of a double-screw extruder is 40-44:1, and the rotating speed of the screw is 500-fold 600 r/min.
The inventors of the present application realized the above-described excellent properties of the refrigerator liner material by strictly designing the contents of the respective components, which are described below through the respective examples.
Example 1
The refrigerator inner container comprises the following materials in parts by weight:
the preparation method of the refrigerator liner material comprises the following steps:
s11, weighing 80 parts by weight of high impact polystyrene resin, 15 parts by weight of polyethylene, 0.3 part by weight of silver ion antibacterial agent, 7 parts by weight of styrene-maleic anhydride copolymer (SMA), 5 parts by weight of styrene-butadiene-styrene block copolymer (SBS), 0.67 part by weight of antioxidant 1010, 0.33 part by weight of antioxidant 168, 1 part by weight of solid paraffin and 1 part by weight of colorant, and placing the components in a high-speed mixer.
And S12, uniformly stirring by using a high-speed mixer, wherein the rotating speed of the mixer is 1200r/min, and mixing for 5 minutes at a high speed to obtain a uniform mixture.
S13, starting the double-screw extruder, feeding the mixture into the extruder, mixing and extruding, and setting the temperature ranges of all sections of the cylinder of the double-screw extruder from the feed inlet to the machine head as follows: the refrigerator inner container material is obtained by fully melting, compounding, extruding, granulating and drying materials under the conditions of shearing, mixing and conveying of a screw, wherein the first zone is 190-fold, the second zone is 210-fold, the third zone is 220-fold, the temperature is 230 ℃ 220-fold, the fifth zone is 210-fold, the sixth zone is 200-fold, the seventh zone is 190-fold, the eighth zone is 220-fold, the ninth zone is 220-fold, the temperature is 230 ℃ and the tenth zone is 200-fold, the length-diameter ratio of a double-screw extruder is 40-44:1, and the rotating speed of the screw is 500-fold 600 r/min.
Example 2
The refrigerator inner container comprises the following materials in parts by weight:
the preparation method of the refrigerator liner material comprises the following steps:
s21, weighing 90 parts by weight of high impact polystyrene resin, 8 parts by weight of polyethylene, 0.6 part by weight of zinc ion antibacterial agent, 12 parts by weight of methyl methacrylate-butadiene-styrene terpolymer (MBS), 10 parts by weight of styrene-butylene/butadiene-styrene copolymer (SEBS), 0.067 part by weight of antioxidant 1010, 0.033 part by weight of antioxidant 168, 0.1 part by weight of chlorinated paraffin and 0.3 part by weight of colorant, and placing in a high-speed mixer.
And S22, uniformly stirring by using a high-speed mixer, wherein the rotating speed of the mixer is 1000r/min, and mixing for 10 minutes at a high speed to obtain a uniform mixture.
S23, starting the double-screw extruder, feeding the mixture into the extruder, mixing and extruding, and setting the temperature ranges of all sections of the cylinder of the double-screw extruder from the feed inlet to the machine head as follows: the refrigerator inner container material is obtained by fully melting, compounding, extruding, granulating and drying materials under the conditions of shearing, mixing and conveying of a screw, wherein the first zone is 190-fold, the second zone is 210-fold, the third zone is 220-fold, the temperature is 230 ℃ 220-fold, the fifth zone is 210-fold, the sixth zone is 200-fold, the seventh zone is 190-fold, the eighth zone is 220-fold, the ninth zone is 220-fold, the temperature is 230 ℃ and the tenth zone is 200-fold, the length-diameter ratio of a double-screw extruder is 40-44:1, and the rotating speed of the screw is 500-fold 600 r/min.
Example 3
The refrigerator inner container comprises the following materials in parts by weight:
the preparation method of the refrigerator liner material comprises the following steps:
s31, weighing 85 parts of high impact polystyrene resin, 10 parts of polyethylene, 0.2 part of silver ion antibacterial agent, 0.2 part of zinc ion antibacterial agent, 10 parts of styrene-ethylene-propylene-styrene segmented copolymer, 8 parts of K glue, 0.4 part of antioxidant 1010, 0.2 part of antioxidant 168, 0.5 part of Ethylene Bis Stearamide (EBS) and 0.5 part of colorant by weight, and placing the materials in a high-speed mixer.
And S32, uniformly stirring by using a high-speed mixer, wherein the rotating speed of the mixer is 1100r/min, and mixing for 8 minutes at a high speed to obtain a uniform mixture.
S33, starting the double-screw extruder, feeding the mixture into the extruder, mixing and extruding, and setting the temperature ranges of all sections of the cylinder of the double-screw extruder from the feed inlet to the machine head as follows: the refrigerator inner container material is obtained by fully melting, compounding, extruding, granulating and drying materials under the conditions of shearing, mixing and conveying of a screw, wherein the first zone is 190-fold, the second zone is 210-fold, the third zone is 220-fold, the temperature is 230 ℃ 220-fold, the fifth zone is 210-fold, the sixth zone is 200-fold, the seventh zone is 190-fold, the eighth zone is 220-fold, the ninth zone is 220-fold, the temperature is 230 ℃ and the tenth zone is 200-fold, the length-diameter ratio of a double-screw extruder is 40-44:1, and the rotating speed of the screw is 500-fold 600 r/min.
Example 4
The refrigerator inner container comprises the following materials in parts by weight:
the preparation method of the refrigerator liner material comprises the following steps:
s41, weighing 88 parts of high impact polystyrene resin, 12 parts of polyethylene, 0.5 part of silver ion antibacterial agent, 9 parts of maleic anhydride graft, 7 parts of polyolefin elastomer (POE), 0.6 part of antioxidant 1010, 0.3 part of antioxidant 168, 0.4 part of solid paraffin, 0.4 part of zinc stearate and 0.6 part of colorant in parts by weight, and placing the components in a high-speed mixer.
And S42, uniformly stirring by using a high-speed mixer, wherein the rotating speed of the mixer is 1050r/min, and mixing for 9 minutes at a high speed to obtain a uniform mixture.
S43, starting the double-screw extruder, feeding the mixture into the extruder, mixing and extruding, and setting the temperature ranges of all sections of the cylinder of the double-screw extruder from the feed inlet to the machine head as follows: the refrigerator inner container material is obtained by fully melting, compounding, extruding, granulating and drying materials under the conditions of shearing, mixing and conveying of a screw, wherein the first zone is 190-fold, the second zone is 210-fold, the third zone is 220-fold, the temperature is 230 ℃ 220-fold, the fifth zone is 210-fold, the sixth zone is 200-fold, the seventh zone is 190-fold, the eighth zone is 220-fold, the ninth zone is 220-fold, the temperature is 230 ℃ and the tenth zone is 200-fold, the length-diameter ratio of a double-screw extruder is 40-44:1, and the rotating speed of the screw is 500-fold 600 r/min.
Example 5
The refrigerator inner container comprises the following materials in parts by weight:
the preparation method of the refrigerator liner material comprises the following steps:
s51, weighing 82 parts by weight of high impact polystyrene resin, 13 parts by weight of polyethylene, 0.4 part by weight of zinc ion antibacterial agent, 4 parts by weight of styrene-maleic anhydride copolymer (SMA), 4 parts by weight of maleic anhydride graft, 9 parts by weight of maleic anhydride graft, 0.2 part by weight of antioxidant 1010, 0.1 part by weight of antioxidant 168, 0.3 part by weight of low molecular weight polyethylene and 0.8 part by weight of colorant, and placing the components in a high-speed mixer.
And S52, uniformly stirring by using a high-speed mixer, wherein the rotating speed of the mixer is 1150r/min, and mixing for 6 minutes at a high speed to obtain a uniform mixture.
S53, starting the double-screw extruder, feeding the mixture into the extruder, mixing and extruding, and setting the temperature ranges of all sections of the cylinder of the double-screw extruder from the feed inlet to the machine head as follows: the refrigerator inner container material is obtained by fully melting, compounding, extruding, granulating and drying materials under the conditions of shearing, mixing and conveying of a screw, wherein the first zone is 190-fold, the second zone is 210-fold, the third zone is 220-fold, the temperature is 230 ℃ 220-fold, the fifth zone is 210-fold, the sixth zone is 200-fold, the seventh zone is 190-fold, the eighth zone is 220-fold, the ninth zone is 220-fold, the temperature is 230 ℃ and the tenth zone is 200-fold, the length-diameter ratio of a double-screw extruder is 40-44:1, and the rotating speed of the screw is 500-fold 600 r/min.
Example 6
The refrigerator inner container comprises the following materials in parts by weight:
the preparation method of the refrigerator liner material comprises the following steps:
s61, weighing 89 parts by weight of high impact polystyrene resin, 9 parts by weight of polyethylene, 0.5 part by weight of silver ion antibacterial agent, 11 parts by weight of styrene-maleic anhydride copolymer (SMA), 3 parts by weight of styrene-butylene/butadiene-styrene copolymer (SEBS), 0.2 part by weight of antioxidant 1010, 0.1 part by weight of antioxidant 168, 0.6 part by weight of zinc stearate and 0.9 part by weight of colorant, and placing the materials in a high-speed mixer.
S62, uniformly stirring by a high-speed mixer, wherein the rotating speed of the mixer is 1000-1200r/min, and mixing for 5-10 minutes at a high speed to obtain a uniform mixture.
S63, starting the double-screw extruder, feeding the mixture into the extruder, mixing and extruding, and setting the temperature ranges of all sections of the cylinder of the double-screw extruder from the feed inlet to the machine head as follows: the refrigerator inner container material is obtained by fully melting, compounding, extruding, granulating and drying materials under the conditions of shearing, mixing and conveying of a screw, wherein the first zone is 190-fold, the second zone is 210-fold, the third zone is 220-fold, the temperature is 230 ℃ 220-fold, the fifth zone is 210-fold, the sixth zone is 200-fold, the seventh zone is 190-fold, the eighth zone is 220-fold, the ninth zone is 220-fold, the temperature is 230 ℃ and the tenth zone is 200-fold, the length-diameter ratio of a double-screw extruder is 40-44:1, and the rotating speed of the screw is 500-fold 600 r/min.
Comparative example 1
The refrigerator inner container comprises the following materials in parts by weight:
88 parts of high impact polystyrene resin,
0.6 part of colorant.
The preparation method of the refrigerator liner material comprises the following steps:
s71, 88 parts by weight of high impact polystyrene resin and 0.6 part by weight of colorant are weighed and placed in a high speed mixer.
And S72, uniformly stirring by using a high-speed mixer, wherein the rotating speed of the mixer is 1050r/min, and mixing for 9 minutes at a high speed to obtain a uniform mixture.
S73, starting the double-screw extruder, feeding the mixture into the extruder, mixing and extruding, and setting the temperature ranges of all sections of the cylinder of the double-screw extruder from the feed inlet to the machine head as follows: the refrigerator inner container material is obtained by fully melting, compounding, extruding, granulating and drying materials under the conditions of shearing, mixing and conveying of a screw, wherein the first zone is 190-fold, the second zone is 210-fold, the third zone is 220-fold, the temperature is 230 ℃ 220-fold, the fifth zone is 210-fold, the sixth zone is 200-fold, the seventh zone is 190-fold, the eighth zone is 220-fold, the ninth zone is 220-fold, the temperature is 230 ℃ and the tenth zone is 200-fold, the length-diameter ratio of a double-screw extruder is 40-44:1, and the rotating speed of the screw is 500-fold 600 r/min.
Comparative example 2
The refrigerator inner container comprises the following materials in parts by weight:
88 parts of high impact polystyrene resin,
0.5 part of silver ion antibacterial agent,
0.6 part of colorant.
The preparation method of the refrigerator liner material comprises the following steps:
s81, 88 parts by weight of high impact polystyrene resin, 0.5 part by weight of silver ion antibacterial agent and 0.6 part by weight of colorant are weighed and placed in a high-speed mixer.
And S82, uniformly stirring by using a high-speed mixer, wherein the rotating speed of the mixer is 1050r/min, and mixing for 9 minutes at a high speed to obtain a uniform mixture.
S83, starting the double-screw extruder, feeding the mixture into the extruder, mixing and extruding, and setting the temperature ranges of all sections of the cylinder of the double-screw extruder from the feed inlet to the machine head as follows: the refrigerator inner container material is obtained by fully melting, compounding, extruding, granulating and drying materials under the conditions of shearing, mixing and conveying of a screw, wherein the first zone is 190-fold, the second zone is 210-fold, the third zone is 220-fold, the temperature is 230 ℃ 220-fold, the fifth zone is 210-fold, the sixth zone is 200-fold, the seventh zone is 190-fold, the eighth zone is 220-fold, the ninth zone is 220-fold, the temperature is 230 ℃ and the tenth zone is 200-fold, the length-diameter ratio of a double-screw extruder is 40-44:1, and the rotating speed of the screw is 500-fold 600 r/min.
The performances of the refrigerator liner materials of examples 1-6 and comparative examples 1 and 2 are compared, and are shown in table 1:
TABLE 1 Properties of refrigerator liner Material
As can be seen from the above table, the impact strength of the refrigerator liner materials prepared in examples 1-6 is obviously higher than that of comparative example 1 and comparative example 2, and the change rate of the tensile strength and the change rate of the elongation at break of the ESCR are obviously lower than those of comparative example 1 and comparative example 2, which shows that the refrigerator liner material has good impact strength, and simultaneously has good environmental stress resistance and chemical corrosion resistance. The antibacterial rate of the refrigerator liner materials prepared in the embodiments 1-6 is more than 99%, which shows that the refrigerator liner materials have good antibacterial and bactericidal effects.
According to the technical scheme, the invention has the advantages and positive effects that:
the refrigerator liner material disclosed by the invention has good antibacterial and bactericidal effects, and also has good environmental stress resistance and chemical corrosion resistance. And the crystallization speed of the refrigerator liner material is reduced, and the whitening phenomenon in the forming process is avoided.
While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (10)
1. The refrigerator liner material is characterized by comprising the following components in parts by weight:
wherein the antibacterial agent is an inorganic antibacterial agent, the particle size of rubber in the high-impact polystyrene resin is more than 5 mu m, the melt index is 1-5g/10min, the elongation is more than 60%, and the notch impact strength is 12-14KJ/m2。
2. The refrigerator liner material of claim 1, wherein the antimicrobial agent comprises at least one of a silver ion antimicrobial agent and a zinc ion antimicrobial agent.
3. The refrigerator liner material of claim 1, wherein the polyethylene is low density polyethylene and has a melt index of 1-4g/10 min.
4. The refrigerator liner material as claimed in claim 1, wherein the compatibilizer comprises at least one of styrene-maleic anhydride copolymer (SMA), methyl methacrylate-butadiene-styrene terpolymer (MBS), styrene-ethylene-propylene-styrene block copolymer, and maleic anhydride graft.
5. The refrigerator liner material of claim 1, wherein the toughening agent comprises at least one of styrene-butadiene-styrene block copolymer (SBS), styrene-butylene/butadiene-styrene copolymer (SEBS), K-glue, polyolefin elastomer (POE), and methyl methacrylate-butadiene-styrene copolymer (MBS).
6. The refrigerator liner material as claimed in claim 1, wherein the antioxidant comprises a main antioxidant and an auxiliary antioxidant, and the weight ratio of the main antioxidant to the auxiliary antioxidant is 2: 1.
7. The refrigerator liner material as claimed in claim 1, wherein the primary antioxidant is antioxidant 1010, and the secondary antioxidant is antioxidant 168.
8. The refrigerator liner material as claimed in claim 1, wherein the lubricant comprises at least one of paraffin wax, chlorinated paraffin wax, Ethylene Bis Stearamide (EBS), zinc stearate, and low molecular weight polyethylene.
9. The preparation method of the refrigerator liner material is characterized by comprising the following steps of:
weighing 80-90 parts by weight of high impact polystyrene resin, 8-15 parts by weight of polyethylene, 0.3-0.6 part by weight of antibacterial agent, 7-12 parts by weight of compatibilizer, 5-10 parts by weight of toughening agent, 0.1-1 part by weight of antioxidant, 0.1-1 part by weight of lubricant and 0.3-1 part by weight of colorant, and placing the materials in a high-speed mixer; the antibacterial agent is an inorganic antibacterial agent, the particle size of rubber in the high-impact polystyrene resin is more than 5 mu m, the melt index is 1-5g/10min, the elongation is more than 60%, and the notch impact strength is 12-14KJ/m2；
Uniformly stirring by a high-speed mixer, wherein the rotating speed of the mixer is 1000-;
starting the double-screw extruder, feeding the mixture into the extruder, mixing and extruding, and setting the temperature ranges of the cylinder of the double-screw extruder from the feed inlet to the head sections as follows: the refrigerator inner container material is obtained by fully melting, compounding, extruding, granulating and drying materials under the conditions of shearing, mixing and conveying of a screw, wherein the first zone is 190-fold, the second zone is 210-fold, the third zone is 220-fold, the temperature is 230 ℃ 220-fold, the fifth zone is 210-fold, the sixth zone is 200-fold, the seventh zone is 190-fold, the eighth zone is 220-fold, the ninth zone is 220-fold, the temperature is 230 ℃ and the tenth zone is 200-fold, the length-diameter ratio of a double-screw extruder is 40-44:1, and the rotating speed of the screw is 500-fold 600 r/min.
10. A refrigerator liner is characterized in that the material of the refrigerator liner is the refrigerator liner material as claimed in any one of claims 1 to 8 or the refrigerator liner material prepared according to claim 9.
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| CN113789015A (en) * | 2021-08-02 | 2021-12-14 | 海信容声(广东)冰箱有限公司 | High-transparency antibacterial GPPS material and preparation method and application thereof |
| CN113789026A (en) * | 2021-08-02 | 2021-12-14 | 海信容声(广东)冰箱有限公司 | HIPS material with lasting antibacterial property and preparation method and application thereof |
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Application publication date: 20201229 |