CN111117036B - Polyethylene composition and preparation method thereof - Google Patents
Polyethylene composition and preparation method thereof Download PDFInfo
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- CN111117036B CN111117036B CN201911400096.XA CN201911400096A CN111117036B CN 111117036 B CN111117036 B CN 111117036B CN 201911400096 A CN201911400096 A CN 201911400096A CN 111117036 B CN111117036 B CN 111117036B
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- 239000004698 Polyethylene Substances 0.000 title claims abstract description 47
- -1 Polyethylene Polymers 0.000 title claims abstract description 45
- 229920000573 polyethylene Polymers 0.000 title claims abstract description 44
- 239000000203 mixture Substances 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000004088 foaming agent Substances 0.000 claims abstract description 16
- 229920013716 polyethylene resin Polymers 0.000 claims abstract description 13
- 239000000945 filler Substances 0.000 claims abstract description 12
- 229920001684 low density polyethylene Polymers 0.000 claims abstract description 5
- 239000004702 low-density polyethylene Substances 0.000 claims abstract description 5
- 239000011347 resin Substances 0.000 claims abstract description 5
- 229920005989 resin Polymers 0.000 claims abstract description 5
- 239000000155 melt Substances 0.000 claims abstract description 3
- 239000003963 antioxidant agent Substances 0.000 claims description 10
- 239000004611 light stabiliser Substances 0.000 claims description 10
- 230000003078 antioxidant effect Effects 0.000 claims description 8
- 238000001746 injection moulding Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 239000000049 pigment Substances 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical group [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- 239000000314 lubricant Substances 0.000 claims description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 claims description 3
- 150000001412 amines Chemical class 0.000 claims description 3
- 150000002148 esters Chemical class 0.000 claims description 3
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 claims description 3
- 239000000454 talc Substances 0.000 claims description 3
- 229910052623 talc Inorganic materials 0.000 claims description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 claims description 2
- 150000001408 amides Chemical class 0.000 claims description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 2
- 239000000194 fatty acid Substances 0.000 claims description 2
- 229930195729 fatty acid Natural products 0.000 claims description 2
- 150000004665 fatty acids Chemical class 0.000 claims description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 239000004604 Blowing Agent Substances 0.000 claims 1
- 239000002671 adjuvant Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 26
- 238000009413 insulation Methods 0.000 abstract description 18
- 238000005187 foaming Methods 0.000 abstract description 10
- 239000012774 insulation material Substances 0.000 abstract description 8
- 239000011148 porous material Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 9
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 7
- 229920000742 Cotton Polymers 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 4
- 239000006260 foam Substances 0.000 description 3
- 238000009472 formulation Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000012752 auxiliary agent Substances 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 235000012222 talc Nutrition 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000013585 weight reducing agent Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical class [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002530 phenolic antioxidant Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/08—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing carbon dioxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/36—Feeding the material to be shaped
- B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
- B29C44/42—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length using pressure difference, e.g. by injection or by vacuum
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0014—Use of organic additives
- C08J9/0023—Use of organic additives containing oxygen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0014—Use of organic additives
- C08J9/0038—Use of organic additives containing phosphorus
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0066—Use of inorganic compounding ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/02—CO2-releasing, e.g. NaHCO3 and citric acid
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
-
- 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
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/02—Organic and inorganic ingredients
-
- 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
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- 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
- C08K3/34—Silicon-containing compounds
-
- 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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/13—Phenols; Phenolates
- C08K5/134—Phenols containing ester groups
- C08K5/1345—Carboxylic esters of phenolcarboxylic acids
-
- 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
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/524—Esters of phosphorous acids, e.g. of H3PO3
- C08K5/526—Esters of phosphorous acids, e.g. of H3PO3 with hydroxyaryl compounds
Abstract
The invention discloses a polyethylene composition, which comprises the following components in parts by weight: 100 parts of polyethylene resin, 0-34 parts of filler and 0.05-2.5 parts of foaming agent; the polyethylene resin is low-density polyethylene resin, and the melt mass flow rate of the polyethylene resin is 10-30 g/10min at 230 ℃ under the load of 2.16 kg. The polyethylene composition is a micro-foaming material obtained by optimizing polyethylene materials with different flowability, can form a sandwich skin-core structure with a compact skin layer outside, has fine and dense pores, can reduce weight by about 25%, has good sound insulation property and good formability, and has good prospects in applications such as automobile air pipes, wheel cover sound insulation materials and front wall sound insulation materials. The invention also provides a preparation method of the polyethylene composition.
Description
Technical Field
The invention relates to the technical field of high polymer materials, in particular to a polyethylene composition and a preparation method thereof.
Background
Polyethylene as a general plastic with high cost performance has excellent mechanical properties such as high strength and high toughness and chemical resistance after being modified, has small water absorption and excellent electrical insulation, and is widely applied to interior and exterior products of automobiles.
Disclose in patent CN 109263214A enclose sound insulation combined material before car, including the cotton layer of inhaling of intermediate level and inhale first layer polymer sheet and the second floor polymer sheet of the cotton layer both sides of sound, through set up protruding barrier and make the sound wave refraction and change the sound wave direction by a wide margin and make and inhale the cotton effective absorption sound wave of sound near the one side of inhaling the cotton in the middle of first layer polymer sheet and second floor polymer sheet, above method mainly starts from structural design, and set out in the aspect of material self structure, it has obvious promotion space to give sound insulation to improve the effect. In addition, CN 109627550 a discloses a foaming material added with an AC foaming agent, which obtains a fine and high-closed-cell-ratio foaming material, on one hand, the added AC foaming agent itself releases ammonia gas during the foaming process, and the residue after foaming has carcinogenic risk, so that the use of such foaming agent is difficult to be applied in a large range in household and automobile products, and meanwhile, the foamed PE material shown in this patent adds a certain amount of EPDM and glass fiber, so that the material formability is reduced, and the use of the foamed PE material in some complex structural parts is limited.
At present, most of PE automotive interior and exterior trim sound insulation materials on the market are multilayer combined sound insulation materials formed by high polymer materials and soundproof cotton, the material preparation process is relatively complex, the material cost is relatively high, and each part has a clear lightweight index based on the lightweight requirement of the automotive industry.
Therefore, the development of an automobile interior and exterior trim which is simple to prepare, can be effectively suitable for automobile parts with complex structures, meets the requirement of automobiles on material light weight, and has better sound insulation performance is needed in the field.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a polyethylene composition and a preparation method thereof.
In order to achieve the purpose, the invention adopts the technical scheme that: a polyethylene composition comprising the following components in parts by weight: 100 parts of polyethylene resin, 0-34 parts of filler and 0.05-2.5 parts of foaming agent; the polyethylene resin is low-density polyethylene resin, and the melt mass flow rate of the polyethylene resin is 10-30 g/10min at 230 ℃ under the load of 2.16 kg.
The polyethylene material with different flowability is optimized to obtain the polyethylene composition which is a micro-foaming material, a sandwich skin-core structure with a compact skin layer outside can be formed, the foam holes are fine and dense, about 10% weight reduction can be realized, the sound insulation performance is good, the formability is good, and the polyethylene composition has a good prospect in applications such as automobile air pipes, wheel cover sound insulation materials and front wall sound insulation materials.
Preferably, the filler is calcium carbonate and/or talc. The granularity D50 of the filler is less than or equal to 5 mu m.
Preferably, the filler is 10-30 parts. The addition of filler plays the effect of foaming nucleation when the material foams, has increased the number of foaming nucleus, and the cell quantity increases, can promote the cell density of material, has reduced the cell size simultaneously, improves expanded material's sound-proof properties, but the talc powder adds the viscosity that excessive also can further promote the material for the expandable property variation of material leads to cell density to descend, when the talc powder is when above-mentioned addition, can have better syllable-dividing effect. More preferably, the filler is 24 parts. When the addition amount of the talcum powder is 24 parts, the sound insulation effect is best.
Preferably, the foaming agent is at least one of bicarbonate and citrate.
Preferably, the polyethylene composition further comprises 0-2 parts of an auxiliary agent and 0-2 parts of a pigment.
Preferably, the auxiliary agent is at least one of an antioxidant, a light stabilizer and a lubricant.
Preferably, the antioxidant is a hindered phenol and phosphite antioxidant.
Preferably, the light stabilizer is a hindered amine light stabilizer.
Preferably, the lubricant is at least one of silicones, esters, amides, polyethylenes, stearates, fatty acids, and esters.
The invention also provides a preparation method of the polyethylene composition, which comprises the following steps: uniformly mixing all the components except the foaming agent, adding the mixture into a double-screw extruder, carrying out melt mixing at the temperature of 170-220 ℃ and the screw rotating speed of 350-450 rpm, extruding and granulating, adding the foaming agent, and carrying out injection molding on the mixture into a mold to obtain the polyethylene composition.
According to the invention, after the foaming agent is added, the injection molding is carried out by adopting a secondary die opening process, the part close to the die during the injection molding is cooled in advance to form a compact skin layer, and the material which is not completely cooled inside is further foamed during the primary micro die opening of the die, so that a sandwich skin-core structure with the compact skin layer outside can be formed, and the sandwich skin-core structure has the properties of weight reduction and sound insulation.
The invention has the beneficial effects that: the invention provides a polyethylene composition. The polyethylene composition is a micro-foaming material obtained by optimizing polyethylene materials with different flowability, can form a sandwich skin-core structure with a compact skin layer outside, has fine and dense pores, can reduce weight by about 25%, has good sound insulation property and good formability, and has good prospects in applications such as automobile air pipes, wheel cover sound insulation materials and front wall sound insulation materials.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples.
In the examples and comparative examples, each of the raw materials was purchased from the market, wherein the polyethylene resins were low density polyethylene resins having melt mass flow rates at 230 ℃ under a load of 2.16kg as shown in Table 1.
TABLE 1 melt mass flow Rate of polyethylene resins
| Polyethylene 1 | Polyethylene 2 | Polyethylene 3 | Polyethylene 4 | Polyethylene 5 | |
| MFR(g/10min) | 10 | 20 | 30 | 5 | 35 |
The particle size D50 of talc was 5 μm.
The foaming agent is a bicarbonate foaming agent, and is EE25C from Yonghe chemical industry Co Ltd;
the pigment is black master, purchased from cabot corporation, and is UN 2005;
antioxidants were purchased from san feng group ltd, shandong, model 1010 (hindered phenolic antioxidants) and 168 (phosphite antioxidants); the weight ratio of 1010 to 168 is: 1: 1;
the light stabilizer is a hindered amine light stabilizer which is purchased from Beijing Tiangang auxiliary company Limited and has the model number of 3808.
The polyethylene compositions of examples 1 to 13 and comparative examples 1 to 6 have the formulations shown in tables 2 and 3,
and uniformly mixing the polyethylene resin, the talcum powder, the pigment, the antioxidant and the light stabilizer in the formulas of the comparative examples 4 and 6, adding the mixture into a double-screw extruder, carrying out melt mixing at the temperature of 170-220 ℃ and the screw rotating speed of 350-450 rpm, carrying out extrusion granulation, and carrying out process injection molding to obtain sample sheets of 100mm x 1.5mm, thus obtaining the polyethylene composition sample sheets of the comparative examples 4 and 6.
Uniformly mixing polyethylene resin, talcum powder, pigment, antioxidant and light stabilizer in the formulas of comparative examples 1-13, 1-3 and 5, adding the mixture into a double-screw extruder, carrying out melt mixing at the temperature of 170-220 ℃ and the screw rotation speed of 350-450 rpm, carrying out extrusion granulation, adding a foaming agent, and carrying out injection molding by adopting a secondary die opening process to obtain sample sheets of 100mm 2.5mm, thus obtaining the polyethylene composition sample sheets of comparative examples 1-13, 1-3 and 5.
The performance of the polyethylene composition sample sheets of examples 1 to 13 and comparative examples 1 to 6 was tested according to the following test methods:
cell density: and (4) shooting a section scanning electron microscope photo of the sample wafer, and fitting and calculating the cell density under a certain volume according to the cell size and the cell distribution in the section photo.
Sound insulation effect at different frequencies: the sound insulation effect of the material is tested by adopting the sound insulation test impedance tube, sound waves with different frequencies are transmitted at one end of the impedance tube, a wafer with the sample size of 100mm is inserted into the middle of the impedance tube, sound sensors are respectively arranged at two sides close to and far away from a sound source of the sample wafer, the intensity dB values of the sound are respectively tested, and the difference value of the two values is the sound insulation value of the sample wafer.
TABLE 2 formulation (parts by weight) and Performance test results of polyethylene compositions according to examples 1 to 8 and comparative examples 1 to 4
TABLE 3 formulation (parts by weight) and Performance test results for polyethylene compositions as described in examples 9 to 13 and comparative examples 5 to 6
In the table, "-" indicates no addition.
Generally speaking, the larger the cell density is, the smaller the cell size is, the better the sound insulation effect is, the sound intensity at 500Hz is greater than 23.5dB, the sound intensity at 1000Hz is greater than 23.8dB, the sound intensity at 1500Hz is greater than 36.2dB, the sound intensity at 2000Hz is greater than 19.5dB, the sound insulation and noise reduction effect better than that of foam can be realized, and the production cost is greatly reduced.
As can be seen from the test results in tables 2 and 3, the addition of the foaming agent increases the cell density of the polyethylene material and improves the sound insulation effect; the low-density polyethylene resin with different melt mass flow rates has larger influence on the foaming degree, when MFR is less than 10g/10min, the cell density is smaller, the sound insulation effect is not obviously improved, along with the increase of the MFR, the cell density is increased, the sound insulation effect is increased, when the MFR is more than 30g/10min, the cell quality is reduced, the macropores are more, the formability of the material is poorer, the cells are easy to break, the surface of the polypropylene material has serious quality problems, the appearance is poor, and the sound insulation effect is reduced. The addition of filler can increase syllable-dividing effect, and along with filler content's increase, its syllable-dividing effect increases, but behind the talcum powder addition amount being greater than 30 parts, syllable-dividing effect reduces, and when the addition amount of talcum powder is greater than 34 parts, its syllable-dividing effect promotes unobviously, and the outward appearance variation.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. The soundproof polyethylene composition is characterized by comprising the following components in parts by weight: 100 parts of polyethylene resin, 10-30 parts of filler and 0.05-2.5 parts of foaming agent; the polyethylene resin is low-density polyethylene resin, and the melt mass flow rate of the polyethylene resin is 10-30 g/10min at 230 ℃ under the load of 2.16 kg;
wherein, the preparation method of the soundproof polyethylene composition comprises the following steps: uniformly mixing all the components except the foaming agent, adding the mixture into a double-screw extruder, carrying out melt mixing at the temperature of 170-220 ℃ and the screw rotating speed of 350-450 rpm, extruding and granulating, adding the foaming agent, carrying out injection molding into a mold, and carrying out injection molding by adopting a secondary mold opening process to obtain the soundproof polyethylene composition.
2. An acoustically insulating polyethylene composition according to claim 1 in which the filler is calcium carbonate and/or talc.
3. An acoustically insulating polyethylene composition according to claim 1 in which the filler is 24 parts.
4. An acoustically insulating polyethylene composition according to claim 1, in which said blowing agent is at least one of the bicarbonate and citrate types.
5. An acoustically insulating polyethylene composition according to claim 1 further comprising 0 to 2 parts by weight of an adjuvant and 0 to 2 parts by weight of a pigment.
6. An acoustically insulating polyethylene composition according to claim 5 in which the adjunct is at least one of an antioxidant, a light stabiliser and a lubricant.
7. An acoustically insulating polyethylene composition according to claim 6 in which the antioxidant is a hindered phenolic and phosphite antioxidant.
8. An acoustically insulating polyethylene composition according to claim 6 in which the light stabilizer is a hindered amine light stabilizer.
9. An acoustically insulating polyethylene composition according to claim 6 in which the lubricant is at least one of silicones, esters, amides, polyethylenes, fatty acids.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911400096.XA CN111117036B (en) | 2019-12-30 | 2019-12-30 | Polyethylene composition and preparation method thereof |
| PCT/CN2020/125122 WO2021135599A1 (en) | 2019-12-30 | 2020-10-30 | Polyethylene composition and preparation method therefor |
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| CN201911400096.XA CN111117036B (en) | 2019-12-30 | 2019-12-30 | Polyethylene composition and preparation method thereof |
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| CN111117036A CN111117036A (en) | 2020-05-08 |
| CN111117036B true CN111117036B (en) | 2022-04-19 |
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| CN111117036B (en) * | 2019-12-30 | 2022-04-19 | 金发科技股份有限公司 | Polyethylene composition and preparation method thereof |
| CN114573896B (en) * | 2022-02-18 | 2022-12-02 | 日丰新材有限公司 | High-density polyethylene double-wall corrugated pipe and preparation method and application thereof |
| CN115232433A (en) * | 2022-08-19 | 2022-10-25 | 东莞市万铨吸塑包装制品有限公司 | Anti-aging injection molding polymer material and preparation method thereof |
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| EP0186887A3 (en) * | 1985-01-02 | 1987-01-07 | Hüls Troisdorf Aktiengesellschaft | Process for manufacturing an electrically conductive reticulated polyolefin foam and its use |
| US6809125B1 (en) * | 2000-06-02 | 2004-10-26 | Sealed Air Corporation (Us) | Foam comprising polyolefin blend and method for producing same |
| CN103554626B (en) * | 2013-11-06 | 2015-10-07 | 福建农林大学 | A kind of fretting map polyethylene based wood-plastic composite material and preparation method thereof |
| CN104744823A (en) * | 2015-03-24 | 2015-07-01 | 合肥创新轻质材料有限公司 | Porous polymer carrier material and preparation method thereof |
| JP6078091B2 (en) * | 2015-03-26 | 2017-02-08 | 株式会社ジェイエスピー | Method for producing polyethylene-based resin laminated foam sheet, polyethylene-based resin laminated foam sheet, and interleaf paper for glass plate using the same |
| CN105086043A (en) * | 2015-05-27 | 2015-11-25 | 上海心尔新材料科技股份有限公司 | High foaming polyethylene alloy material and preparation method therefor |
| KR101786313B1 (en) * | 2016-03-17 | 2017-10-17 | 현대자동차주식회사 | Polyolefin composite composition for automotive airduct |
| CN109705432A (en) * | 2018-12-14 | 2019-05-03 | 金旸（厦门）新材料科技有限公司 | A kind of crosslinked foaming type washing machine masterbatch and preparation method thereof |
| CN111117036B (en) * | 2019-12-30 | 2022-04-19 | 金发科技股份有限公司 | Polyethylene composition and preparation method thereof |
| CN112175264A (en) * | 2020-09-23 | 2021-01-05 | 中广核三角洲（江苏）塑化有限公司 | Size-stable type automobile cavity plugging expansion adhesive and preparation method thereof |
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Effective date of registration: 20231113 Address after: 510000 No. 33 Kefeng Road, Science City, Guangzhou High-tech Industrial Development Zone, Guangdong Province Patentee after: KINGFA SCI. & TECH. Co.,Ltd. Patentee after: Jinfa Environmental Protection Technology Co.,Ltd. Address before: 510663 Guangzhou science and Technology Development Zone, Guangdong, China, 33 Patentee before: KINGFA SCI. & TECH. Co.,Ltd. |