CN115926310A - Low-temperature-resistant polyethylene composite material and application thereof in refrigerator drawer - Google Patents
Low-temperature-resistant polyethylene composite material and application thereof in refrigerator drawer Download PDFInfo
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- CN115926310A CN115926310A CN202210221631.0A CN202210221631A CN115926310A CN 115926310 A CN115926310 A CN 115926310A CN 202210221631 A CN202210221631 A CN 202210221631A CN 115926310 A CN115926310 A CN 115926310A
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- -1 polyethylene Polymers 0.000 title claims abstract description 87
- 239000004698 Polyethylene Substances 0.000 title claims abstract description 69
- 229920000573 polyethylene Polymers 0.000 title claims abstract description 69
- 239000002131 composite material Substances 0.000 title claims abstract description 65
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000002994 raw material Substances 0.000 claims abstract description 25
- 239000011863 silicon-based powder Substances 0.000 claims abstract description 25
- 238000002360 preparation method Methods 0.000 claims abstract description 18
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 16
- 239000000057 synthetic resin Substances 0.000 claims abstract description 16
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 16
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 16
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 14
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 14
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 7
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000008117 stearic acid Substances 0.000 claims abstract description 7
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 46
- 239000011787 zinc oxide Substances 0.000 claims description 23
- 239000004743 Polypropylene Substances 0.000 claims description 19
- 229920001155 polypropylene Polymers 0.000 claims description 19
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 18
- 229920001903 high density polyethylene Polymers 0.000 claims description 17
- 239000004700 high-density polyethylene Substances 0.000 claims description 17
- 229920001684 low density polyethylene Polymers 0.000 claims description 16
- 239000004702 low-density polyethylene Substances 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 16
- 229920003023 plastic Polymers 0.000 claims description 11
- 239000004033 plastic Substances 0.000 claims description 11
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 10
- 239000008116 calcium stearate Substances 0.000 claims description 10
- 235000013539 calcium stearate Nutrition 0.000 claims description 10
- 239000000395 magnesium oxide Substances 0.000 claims description 10
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 10
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 10
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 10
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 10
- 229940114926 stearate Drugs 0.000 claims description 9
- 229920005629 polypropylene homopolymer Polymers 0.000 claims description 6
- 239000004709 Chlorinated polyethylene Substances 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 4
- 238000005469 granulation Methods 0.000 claims description 4
- 230000003179 granulation Effects 0.000 claims description 4
- 238000001746 injection moulding Methods 0.000 claims description 4
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 claims description 4
- 239000012188 paraffin wax Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 2
- CEGOLXSVJUTHNZ-UHFFFAOYSA-K aluminium tristearate Chemical compound [Al+3].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CEGOLXSVJUTHNZ-UHFFFAOYSA-K 0.000 claims description 2
- 229940063655 aluminum stearate Drugs 0.000 claims description 2
- GWOWVOYJLHSRJJ-UHFFFAOYSA-L cadmium stearate Chemical compound [Cd+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O GWOWVOYJLHSRJJ-UHFFFAOYSA-L 0.000 claims description 2
- UQLDLKMNUJERMK-UHFFFAOYSA-L di(octadecanoyloxy)lead Chemical compound [Pb+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O UQLDLKMNUJERMK-UHFFFAOYSA-L 0.000 claims description 2
- FRVCGRDGKAINSV-UHFFFAOYSA-L iron(2+);octadecanoate Chemical compound [Fe+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O FRVCGRDGKAINSV-UHFFFAOYSA-L 0.000 claims description 2
- 235000019359 magnesium stearate Nutrition 0.000 claims description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 2
- 229940114930 potassium stearate Drugs 0.000 claims description 2
- ANBFRLKBEIFNQU-UHFFFAOYSA-M potassium;octadecanoate Chemical compound [K+].CCCCCCCCCCCCCCCCCC([O-])=O ANBFRLKBEIFNQU-UHFFFAOYSA-M 0.000 claims description 2
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 claims description 2
- 239000000314 lubricant Substances 0.000 claims 1
- 235000013873 oxidized polyethylene wax Nutrition 0.000 claims 1
- 239000004209 oxidized polyethylene wax Substances 0.000 claims 1
- 239000001993 wax Substances 0.000 claims 1
- 230000000844 anti-bacterial effect Effects 0.000 abstract description 11
- 230000001877 deodorizing effect Effects 0.000 abstract description 5
- 238000005452 bending Methods 0.000 abstract description 4
- 238000004332 deodorization Methods 0.000 abstract description 3
- 231100000252 nontoxic Toxicity 0.000 abstract description 3
- 230000003000 nontoxic effect Effects 0.000 abstract description 3
- 230000001954 sterilising effect Effects 0.000 abstract description 3
- 238000004659 sterilization and disinfection Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 11
- 239000003921 oil Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- 241000700605 Viruses Species 0.000 description 2
- 230000007794 irritation Effects 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 241000588724 Escherichia coli Species 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
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- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the field of C08L23/00, in particular to a low-temperature-resistant polyethylene composite material and application thereof in a refrigerator drawer, wherein 40-60 parts of polyethylene, 60-95 parts of thermoplastic synthetic resin, 0.5-4 parts of stearic acid, 1-3 parts of stearate, 95-400 parts of silicon powder and 4-8 parts of metal oxide are used as main raw materials, so that the low-temperature-resistant polyethylene composite material is provided, is safe and non-toxic, has high glossiness, has an outstanding antibacterial and deodorizing function, realizes long-acting sterilization and long-acting deodorization, meets the requirements of the refrigerator drawer on bearing capacity, impact resistance and low-temperature resistance, solves the problems of bending deformation and service life reduction of the drawer due to insufficient bearing of the existing refrigerator drawer, is applied to the preparation of the refrigerator drawer, improves the product quality of the refrigerator drawer, prolongs the service life of the refrigerator drawer, realizes the autonomous supply of the refrigerator drawer, and has important research significance and practical application value.
Description
Technical Field
The invention relates to the field of C08L23/00, in particular to a low-temperature-resistant polyethylene composite material and application thereof in a refrigerator drawer.
Background
The refrigerator drawer has high requirements on materials, certain bearing capacity, impact resistance and low temperature resistance are required, most of the existing refrigerator drawers are made of imported PS materials, and the price is high; and polypropylene is used as a raw material for part of refrigerator materials, and although the refrigerator has certain corrosion resistance and relatively simple production process, the refrigerator is very easy to be impacted and broken or the service life of the drawer is seriously influenced by insufficient bearing in the actual use process.
Chinese patent CN112430369A discloses a refrigerator drawer material and a preparation method thereof, and polystyrene, polybutadiene rubber, nitrile rubber, white carbon black, maleic anhydride monomer and the like are mainly used as raw materials, so that the provided material has better toughness and oil resistance, but the requirements of the refrigerator drawer on the low-temperature resistance and impact resistance of the material are ignored; chinese patent CN104479217A discloses a refrigerator drawer material, which uses low-density polypropylene as a main material, adopts ethylene propylene diene monomer and calcium carbonate to toughen, improves the stability and mechanical properties of the material, but can not meet the requirements of the existing refrigerator drawer on oil resistance, antibacterial property and bearing property.
Therefore, the low-temperature-resistant polyethylene composite material is safe, non-toxic, high in glossiness, outstanding in antibacterial and deodorizing functions, capable of meeting the requirements of the refrigerator drawer on bearing capacity, impact resistance and low-temperature resistance, applied to preparation of the refrigerator drawer, capable of improving product quality of the refrigerator drawer, prolonging service life of the refrigerator drawer and achieving independent supply of the refrigerator drawer, and has important research significance and practical application value.
Disclosure of Invention
The invention provides a low-temperature-resistant polyethylene composite material, which at least comprises the following preparation raw materials in parts by weight: 40-60 parts of polyethylene, 60-95 parts of thermoplastic synthetic resin, 0.5-4 parts of stearic acid, 1-3 parts of stearate, 95-400 parts of silicon powder and 4-8 parts of metal oxide.
As a preferred technical solution, the polyethylene includes low density polyethylene, high density polyethylene; the mass ratio of the low-density polyethylene to the high-density polyethylene is (30-40): (10-20); preferably, the high density polyethylene has a melt index (GBT 1845, with a load of 2.16kg, test temperature of 190 ℃) of 6 to 9g/10min.
The product number of the low density polyethylene is F-A10239, and the low density polyethylene is purchased from Shanghai Ji to Biochemical technology Co., ltd; the high density polyethylene is available under the product number P77512, available from gie, shanghai to bio-chemical technology limited.
As a preferable embodiment, the thermoplastic synthetic resin includes at least: homo-polypropylene, co-polypropylene, polyethylene oxide; preferably, the thermoplastic synthetic resin comprises 35 to 50 parts by weight of homo-polypropylene, 5 to 10 parts by weight of co-polypropylene and 6 to 12 parts by weight of polyethylene oxide; preferably, the polyethylene oxide has an average molecular weight of 8000;
the product number of the homopolymerized polypropylene is PA09561, and the product number of the copolymerized polypropylene is PA09562, which are purchased from Guangdong Wengjiang chemical reagent Co. The polyethylene oxide has a product number of P831923, and is purchased from Shanghai Maxin Biotechnology, inc.;
according to the polyethylene oxide composite material, polyethylene oxide with the average molecular weight of 8000 is adopted, and homo-polypropylene and co-polypropylene are matched, so that on one hand, polyethylene is effectively toughened, the toughness and the shock resistance of the low-temperature-resistant polyethylene composite material are improved, on the other hand, the compatibility between high-density polyethylene and silicon powder in the system is remarkably improved, the silicon powder is favorably dispersed and fixed in the system, the stability of the system is improved, and the product quality of the low-temperature-resistant polyethylene composite material is ensured.
As a preferred technical scheme, the preparation raw materials of the low temperature resistant polyethylene composite material also comprise 0.5-4 parts by weight of chlorinated polyethylene, 1-5 parts by weight of paraffin and 0.5-3 parts by weight of ceramic micropowder;
as a preferable technical scheme, the metal oxide is selected from at least one of aluminum oxide, magnesium oxide, zinc oxide and zirconium dioxide; preferably, the metal oxide is a combination of aluminum oxide, magnesium oxide and zinc oxide; preferably, the mass ratio of the aluminum oxide to the magnesium oxide to the zinc oxide is (1-2): (1.2-2.2): (1.5-2.5); in the research process, the application discovers that when the mass ratio is (1-2): (1.2-2.2): (1.5-2.5) when aluminum oxide, magnesium oxide and zinc oxide are used, the surface gloss, transparency and tensile strength of the polyethylene composite material are obviously improved; preferably, the zinc oxide is nano zinc oxide, and the particle size of the nano zinc oxide is 30-50nm; the polyethylene composite material provided by the application can efficiently and quickly kill various virus and bacteria by adopting the nano zinc oxide with the particle size of 30 +/-10 nm, realizes long-acting sterilization and long-acting deodorization, is harmless to human bodies and environment, has no irritation, and is particularly suitable for being used as a raw material of a refrigerator drawer.
The product number of the nano zinc oxide is Z112847, and the nano zinc oxide is purchased from Shanghai Allantin Biotechnology Co.
As a preferable technical solution, the stearate is at least one selected from sodium stearate, magnesium stearate, zinc stearate, calcium stearate, lead stearate, aluminum stearate, cadmium stearate, iron stearate and potassium stearate; preferably, the stearate is a combination of calcium stearate and zinc stearate, and the mass ratio of the calcium stearate to the zinc stearate is (2-4): (1.8-3.5). During the research process, the applicant finds that when the mass ratio is (2-4): the calcium stearate and the zinc stearate of (1.8-3.5) are matched with stearic acid, so that the dispersing capacity of the metal oxide in a system is obviously improved, the metal oxide is favorably fixed in low-density polyethylene, high-density polyethylene and thermoplastic synthetic resin in the system, and the provided low-temperature-resistant polyethylene composite material can effectively exert antibacterial and deodorizing performance for a long time, so that the composite material is better suitable for preparation and use of refrigerator drawers.
As a preferred technical solution, the silicon powder accounts for 65 to 72wt% of the total weight of the composite material, and more preferably, the silicon powder accounts for 67wt% of the total weight of the composite material.
As a preferred technical scheme, the oil absorption value of the silicon powder is 17-26; preferably, the silicon powder is selected from at least one of H032, L032, H050, L050 and H070; preferably, the silicon powder is H070;
the H070 type silicon powder has an oil absorption value of 20 and a median diameter of 1500 meshes and is purchased from Anmi micro-nano new material (Guangzhou) Co.
By adopting the silicon powder with the oil absorption value of 20 and the median diameter of 1500 meshes and controlling the mass of the added silicon powder to account for 67wt% of the total weight of the composite material, the thermoplastic synthetic resin in a matching system is matched to achieve synergistic toughening, so that the provided low-temperature-resistant polyethylene composite material has excellent impact resistance and wear resistance, and the problems of bending deformation and service life reduction of the drawer due to insufficient bearing of the existing refrigerator drawer are solved.
The preparation steps of the low temperature resistant polyethylene composite material at least comprise:
(1) Placing the raw materials in a mixing container according to the parts by weight, and stirring for 20-30min by using a handheld stirrer to obtain a raw material mixture;
(2) Controlling the temperature to be 180-200 ℃, and adding the raw material mixture obtained in the step (1) into an internal mixer for internal mixing for 8-10min to obtain an internal mixing mixture;
(3) Presetting the temperature of an extruding machine to be 190-200 ℃, adding the banburying mixture obtained in the step (2) into the extruding machine, drawing a plastic strip, and sending the plastic strip to a granulator for granulation to obtain the finished product.
The invention provides an application of the low-temperature-resistant polyethylene composite material, which is applied to preparation of refrigerator drawers.
The refrigerator drawer is made of a low-temperature-resistant polyethylene composite material through an injection molding process;
the refrigerator drawer is composed of a bottom plate, a left side plate, a right side plate, a rear plate, a front plate and a handle.
Advantageous effects
1. The low-temperature-resistant polyethylene composite material provided by the invention is safe, non-toxic, high in glossiness, outstanding in antibacterial and deodorizing functions, and capable of meeting the requirements of refrigerator drawers on bearing capacity, impact resistance and low-temperature resistance, is applied to preparation of the refrigerator drawers, improves the product quality of the refrigerator drawers, prolongs the service life of the refrigerator drawers, and realizes independent supply of the refrigerator drawers, and has important research significance and practical application value.
2. According to the polyethylene oxide composite material, polyethylene oxide with the average molecular weight of 8000 is adopted, and homo-polypropylene and co-polypropylene are matched, so that on one hand, polyethylene is effectively toughened, the toughness and the shock resistance of the low-temperature-resistant polyethylene composite material are improved, on the other hand, the compatibility between high-density polyethylene and silicon powder in the system is remarkably improved, the silicon powder is favorably dispersed and fixed in the system, the stability of the system is improved, and the product quality of the low-temperature-resistant polyethylene composite material is ensured.
3. The application adopts the following components in percentage by mass (1-2): (1.2-2.2): (1.5-2.5) aluminum oxide, magnesium oxide and zinc oxide, the surface gloss, transparency and tensile strength of the polyethylene composite material are obviously improved; particularly, the polyethylene composite material provided by the application can efficiently and quickly kill various viruses and bacteria by adopting the nano zinc oxide with the particle size of 30 +/-10 nm, realizes long-acting sterilization and long-acting deodorization, is harmless to human bodies and environment, has no irritation, and is particularly suitable for being used as a raw material of refrigerator drawers.
4. The mass ratio of (2-4): the calcium stearate and the zinc stearate of (1.8-3.5) are matched with stearic acid, so that the dispersing capacity of the metal oxide in a system is obviously improved, the metal oxide is favorably fixed in low-density polyethylene, high-density polyethylene and thermoplastic synthetic resin in the system, and the provided low-temperature-resistant polyethylene composite material can effectively exert antibacterial and deodorizing performance for a long time, so that the low-temperature-resistant polyethylene composite material is better suitable for preparation and use of refrigerator drawers.
5. By adopting the silicon powder with the oil absorption value of 20 and the median diameter of 1500 meshes and controlling the mass of the added silicon powder to account for 67wt% of the total weight of the composite material, the thermoplastic synthetic resin in a matching system is matched to achieve synergistic toughening, so that the provided low-temperature-resistant polyethylene composite material has excellent impact resistance and wear resistance, and the problems of bending deformation and service life reduction of the drawer due to insufficient bearing of the existing refrigerator drawer are solved.
Detailed Description
Example 1
In one aspect, embodiment 1 of the present invention provides a low temperature resistant polyethylene composite material, which comprises the following raw materials, by weight: 50 parts of polyethylene, 63 parts of thermoplastic synthetic resin, 2 parts of stearic acid, 2 parts of stearate, 264 parts of silicon powder and 6 parts of metal oxide.
The polyethylene comprises low density polyethylene and high density polyethylene; the mass ratio of the low-density polyethylene to the high-density polyethylene is 35:15; the high-density polyethylene has a melt index (GBT 1845, test temperature of 190 ℃ with a load of 2.16 kg) of 6 to 9g/10min.
The product number of the low-density polyethylene is F-A10239, and the low-density polyethylene is purchased from Shanghai Ji to Biochemical technology Co., ltd; the high density polyethylene is available under the product number P77512, available from gie, shanghai to bio-chemical technology limited.
The thermoplastic synthetic resin comprises 45 parts by weight of homopolymerized polypropylene, 8 parts by weight of copolymerized polypropylene and 10 parts by weight of polyoxyethylene; the average molecular weight of the polyethylene oxide is 8000;
the product number of the homopolymerized polypropylene is PA09561, and the product number of the copolymerized polypropylene is PA09562, which are purchased from Guangdong Wengjiang chemical reagent Co. The product number of the polyoxyethylene is P831923, and the polyoxyethylene is purchased from Shanghai Michelin Biochemical technology Co., ltd;
the preparation raw materials of the low-temperature resistant polyethylene composite material also comprise 2 parts of chlorinated polyethylene, 3 parts of paraffin and 2 parts of ceramic micro powder;
the metal oxide is a combination of aluminum oxide, magnesium oxide and zinc oxide; the mass ratio of the aluminum oxide to the magnesium oxide to the zinc oxide is 1.5:2:1.8.
the product number of the nano zinc oxide is Z112847, and the nano zinc oxide is purchased from Shanghai Allantin Biotechnology Co.
The stearate is a combination of calcium stearate and zinc stearate, and the mass ratio of the calcium stearate to the zinc stearate is 3:2.
the silicon powder accounts for 67wt% of the total weight of the composite material.
The silicon powder is H070;
the H070 type silicon powder has an oil absorption value of 20 and a median diameter of 1500 meshes and is purchased from Anmi micro-nano new material (Guangzhou) Co.
The preparation steps of the low temperature resistant polyethylene composite material at least comprise:
(1) Placing the raw materials in a mixing container according to the parts by weight, and stirring for 25min by using a handheld stirrer to obtain a raw material mixture;
(2) Controlling the temperature to be 200 ℃, and adding the raw material mixture obtained in the step (1) into an internal mixer for internal mixing for 8min to obtain an internal mixed mixture;
(3) Presetting the temperature of an extruding machine to be 200 ℃, adding the banburying mixture obtained in the step (2) into the extruding machine, drawing a plastic strip, and conveying the plastic strip to a granulator for granulation to obtain the finished product.
In another aspect, embodiment 1 of the present invention provides an application of a low temperature resistant polyethylene composite material, which is applied to the preparation of a drawer of a refrigerator; the refrigerator drawer is made of a low-temperature-resistant polyethylene composite material through an injection molding process; the refrigerator drawer is composed of a bottom plate, a left side plate, a right side plate, a rear plate, a front plate and a handle.
Example 2
In one aspect, embodiment 2 of the present invention provides a low temperature resistant polyethylene composite material, which comprises the following raw materials, by weight: 50 parts of polyethylene, 60 parts of thermoplastic synthetic resin, 2 parts of stearic acid, 2 parts of stearate, 258 parts of silicon powder and 6 parts of metal oxide.
The polyethylene comprises low density polyethylene and high density polyethylene; the mass ratio of the low-density polyethylene to the high-density polyethylene is 35:15; the high-density polyethylene has a melt index (GBT 1845, 2.16kg load, 190 ℃ test temperature) of 6 to 9g/10min.
The product number of the low density polyethylene is F-A10239, and the low density polyethylene is purchased from Shanghai Ji to Biochemical technology Co., ltd; the high density polyethylene is available under the product number P77512, available from gie, shanghai to bio-chemical technology limited.
The thermoplastic synthetic resin comprises 40 parts of homopolymerized polypropylene, 8 parts of copolymerized polypropylene and 12 parts of polyethylene oxide in parts by weight; the average molecular weight of the polyethylene oxide is 8000;
the product number of the homopolymerized polypropylene is PA09561, and the product number of the copolymerized polypropylene is PA09562, which are purchased from Guangdong Wengjiang chemical reagent Co. The product number of the polyoxyethylene is P831923, and the polyoxyethylene is purchased from Shanghai Michelin Biochemical technology Co., ltd;
the preparation raw materials of the low-temperature resistant polyethylene composite material also comprise 3 parts of chlorinated polyethylene, 2 parts of paraffin and 2 parts of ceramic micro powder by weight;
the metal oxide is a combination of aluminum oxide, magnesium oxide and zinc oxide; the mass ratio of the aluminum oxide to the magnesium oxide to the zinc oxide is 3:2.2:2.5.
the product number of the nano zinc oxide is Z112847, and the nano zinc oxide is purchased from Shanghai Allantin Biotechnology Co.
The stearate is a combination of calcium stearate and zinc stearate, and the mass ratio of the calcium stearate to the zinc stearate is 4:3.5.
the silicon powder accounts for 67wt% of the total weight of the composite material.
The silicon powder is H070;
the H070 type silicon powder has an oil absorption value of 20 and a median diameter of 1500 meshes and is purchased from Anmi micro-nano new material (Guangzhou) Co.
The preparation steps of the low temperature resistant polyethylene composite material at least comprise:
(1) Placing the raw materials in a mixing container according to the parts by weight, and stirring for 25min by using a handheld stirrer to obtain a raw material mixture;
(2) Controlling the temperature to be 200 ℃, and adding the raw material mixture obtained in the step (1) into an internal mixer for internal mixing for 8min to obtain an internal mixed mixture;
(3) And (3) setting the temperature of the extruding machine to be 200 ℃ in advance, adding the banburying mixture obtained in the step (2) into the extruding machine, drawing a plastic strip, and feeding the plastic strip to a granulator for granulation to obtain the plastic strip.
In another aspect, embodiment 2 of the invention provides an application of a low temperature resistant polyethylene composite material, which is applied to preparation of a refrigerator drawer; the refrigerator drawer is made of a low-temperature-resistant polyethylene composite material through an injection molding process; the refrigerator drawer is composed of a bottom plate, a left side plate, a right side plate, a rear plate, a front plate and a handle.
Comparative example 1
Comparative example 1 of the present invention provides a low temperature resistant polyethylene composite, which is similar to example 1, except that the polyethylene is a low density polyethylene.
Comparative example 2
The specific implementation manner of the low-temperature-resistant polyethylene composite material provided by the comparative example 2 of the invention is the same as that of the example 1, except that the particle size of the nano zinc oxide is 100nm, and the nano zinc oxide is purchased from Shanghai Aladdin Biotechnology Co., ltd.
Comparative example 3
Comparative example 3 of the present invention provides a low temperature resistant polyethylene composite material, which is the same as example 1 except that the thermoplastic synthetic resin is a copolymerized polypropylene.
Performance test method
(1) Notched impact strength: referring to GB/T1843, notched impact strength of the low-temperature resistant polyethylene composite materials prepared in the examples and the comparative examples is measured by a cantilever beam impact testing machine, wherein three parallel samples are arranged, the specification of each sample is 8mm-4mm, and the test results are averaged;
(2) Tensile strength: according to GB/T1040, a universal tensile testing machine is adopted to measure the tensile strength of the low temperature resistant polyethylene composite material prepared in the examples and the comparative examples, and the test condition is 50mm/min;
(3) Bending strength: the low-temperature resistant polyethylene composite materials prepared in the examples and the comparative examples are subjected to elongation at break test by using a universal tensile testing machine, the test method refers to GB/19341, and the test condition is 2mm/min;
(4) And (3) antibacterial performance: the antibacterial rate of the low-temperature resistant polyethylene composite materials prepared in the examples and the comparative examples on escherichia coli is tested according to the QB/T2591-2003 'antibacterial property test method and antibacterial effect of antibacterial plastics';
referring to table 1, table 1 shows the performance test results of the low temperature resistant polyethylene composites prepared in examples 1 to 2 and comparative examples 1 to 3.
Claims (10)
1. The low-temperature-resistant polyethylene composite material is characterized by at least comprising the following preparation raw materials in parts by weight: 40-60 parts of polyethylene, 60-95 parts of thermoplastic synthetic resin, 0.5-4 parts of stearic acid, 1-3 parts of stearate, 95-400 parts of silicon powder and 4-8 parts of metal oxide.
2. A low temperature resistant polyethylene composite material according to claim 1, wherein said polyethylene comprises low density polyethylene, high density polyethylene.
3. A low temperature resistant polyethylene composite material according to claim 2, characterized in that said thermoplastic synthetic resin comprises at least: homo-polypropylene, co-polypropylene, polyethylene oxide.
4. A low temperature resistant polyethylene composite material according to claim 3, wherein said thermoplastic synthetic resin comprises, by weight, 35-50 parts of homo-polypropylene, 5-10 parts of co-polypropylene, 6-12 parts of polyethylene oxide.
5. The low temperature resistant polyethylene composite material according to claim 1, wherein the raw materials for preparing the low temperature resistant polyethylene composite material further comprise 0.5-4 parts by weight of chlorinated polyethylene, 1-5 parts by weight of paraffin and 0.5-3 parts by weight of ceramic micropowder.
6. The low temperature resistant polyethylene composite material of claim 1, wherein the lubricant is at least one selected from the group consisting of polyethylene wax and oxidized polyethylene wax.
7. The low temperature resistant polyethylene composite material according to claim 1, wherein the metal oxide is at least one selected from the group consisting of aluminum oxide, magnesium oxide, zinc oxide, and zirconium dioxide.
8. A low temperature resistant polyethylene composite material according to claim 7, wherein said stearate is selected from at least one of sodium stearate, magnesium stearate, zinc stearate, calcium stearate, lead stearate, aluminum stearate, cadmium stearate, iron stearate, potassium stearate.
9. A low temperature resistant polyethylene composite according to any of claims 1-8, characterized in that the preparation step of the low temperature resistant polyethylene composite comprises at least:
(1) Placing the raw materials in a mixing container according to the parts by weight, and stirring for 20-30min by using a handheld stirrer to obtain a raw material mixture;
(2) Controlling the temperature to be 180-200 ℃, and adding the raw material mixture obtained in the step (1) into an internal mixer for internal mixing for 8-10min to obtain an internal mixing mixture;
(3) And (3) setting the temperature of the extruding machine to be 190-200 ℃, adding the banburying mixture obtained in the step (2) into the extruding machine, drawing a plastic strip, and feeding the plastic strip to a granulator for granulation to obtain the plastic strip.
10. The use of the low temperature resistant polyethylene composite material according to any one of claims 1 to 9, wherein the low temperature resistant polyethylene composite material is used for preparing a refrigerator drawer, the refrigerator drawer is prepared by an injection molding process and is composed of a bottom plate, a left side plate, a right side plate, a back plate, a front plate and a handle.
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