CN112795126A - Refrigerator wind shielding strip formed by co-extrusion of two materials and manufacturing process - Google Patents
Refrigerator wind shielding strip formed by co-extrusion of two materials and manufacturing process Download PDFInfo
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- CN112795126A CN112795126A CN202011623188.7A CN202011623188A CN112795126A CN 112795126 A CN112795126 A CN 112795126A CN 202011623188 A CN202011623188 A CN 202011623188A CN 112795126 A CN112795126 A CN 112795126A
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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
- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
- F25D23/08—Parts formed wholly or mainly of plastics materials
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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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
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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
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
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- Chemical & Material Sciences (AREA)
- Medicinal Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a refrigerator weather strip formed by co-extrusion of two materials and a manufacturing process, and relates to the technical field of refrigerators. The invention comprises a sealing structure and a fixing structure, wherein the sealing structure is made of TPE materials, and the TPE materials comprise the following raw materials in percentage by weight: 25% -40% of styrene elastomer; 3% -10% of polyethylene; 10% -15% of polypropylene; 16% -35% of filling oil; 10-20% of inorganic filler; 2% -5% of a lubricant; the fixing structure is made of a PP material, and the PP material comprises the following raw materials in parts by weight: 100 parts of PP; 3-5 parts of an antioxidant; 3-5 parts of a light stabilizer. According to the invention, the fixing structure is made of TPE material, the sealing structure is made of PP material with good binding property with TPE, and then the weather strip is manufactured by proper co-extrusion process conditions, so that the weather strip performance meets the sealing requirement of the refrigerator.
Description
Technical Field
The invention belongs to the technical field of refrigerators, and particularly relates to a refrigerator weather strip formed by co-extrusion of two materials and a manufacturing process thereof.
Background
The refrigerator generally comprises a refrigerating chamber and a freezing chamber, wherein the refrigerating chamber is higher in temperature, the set temperature is about 5 ℃, the freezing chamber is lower in temperature, the normal use temperature is about-15 ℃, the environment temperature outside the refrigerator is generally above 10 ℃, the temperature difference between the inside and the outside of the refrigerator is large, and the condensation phenomenon of the refrigerator is easy to occur, particularly the freezing chamber of the refrigerator; if the sealing performance of the freezing chamber is poor, the freezing chamber is contacted with hot air outside the environment to generate condensation, and the energy consumption level of the refrigerator is greatly influenced.
In order to improve the sealing capability of the freezer compartment of the refrigerator, a refrigerator designer usually designs a wind-shielding strip to improve the sealing capability of the freezer compartment of the refrigerator; the wind-shielding strip is a structural sealing member for isolating cold air in the refrigerator from hot air outside the refrigerator. The wind shielding strip comprises two parts which are respectively a fixing structure and a sealing structure, the fixing structure is arranged on ribs of an inner container of a refrigerator freezing door, and the sealing structure is abutted against the inside of the refrigerator body when the refrigerator door is combined with the refrigerator body, so that the sealing capacity of the freezing chamber is improved by sealing the door case.
The refrigerator is with keeping out wind strip material can select PVC material and TPE (thermoplastic elastomer, hereinafter for short TPE) material two kinds, and to PVC material, the temperature step-down PVC material sclerosis loses sealed effect, so all the preference selects TPE material in the refrigerator industry, but to keep out the wind strip, TPE material is several times of PVC cost, has improved the cost of this spare part greatly, its TPE keeps out wind a large amount of the rising of strip cost, seriously restricts the large batch application of TPE keep out the wind strip in the refrigerator.
Disclosure of Invention
The invention aims to provide a refrigerator weather strip formed by co-extruding two materials, which is prepared by respectively adopting two materials as a fixing structure and a sealing structure, wherein the fixing structure is made of a TPE material, the sealing structure is made of a PP material with good bonding property with the TPE, and then the weather strip is manufactured by proper co-extrusion process conditions, so that the performance of the weather strip meets the sealing requirement of a refrigerator.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a refrigerator weather strip formed by co-extruding two materials, which comprises a sealing structure and a fixing structure, wherein the sealing structure and the fixing structure are respectively made of different materials; the sealing structure is made of a TPE material, and the TPE material comprises the following raw materials in percentage by weight: 25% -40% of styrene elastomer; 3% -10% of polyethylene; 10% -15% of polypropylene; 16% -35% of filling oil; 10-20% of inorganic filler; 2% -5% of a lubricant; the fixing structure is made of a PP material, and the PP material comprises the following raw materials in parts by weight: 100 parts of PP; 3-5 parts of an antioxidant; 3-5 parts of a light stabilizer.
Further, the sealing structure and the fixing structure are integrally formed in a co-extrusion mode.
Further, the extender oil is Anhui oil or white oil.
Further, the inorganic filler is one of calcium carbonate, talcum powder and barium sulfate.
Further, the lubricant is polyethylene wax or oleamide.
A manufacturing process of a refrigerator weather strip formed by co-extrusion of two materials comprises the following steps:
preparing raw materials required by a TPE material and a PP material formula, and weighing;
step two, manufacturing TPE powder; uniformly mixing the styrene elastomer and the filling oil in a mixing machine, then adding the polyethylene, the polypropylene and the inorganic filler in the formula in steps, and uniformly mixing to obtain TPE powder;
manufacturing PP powder; uniformly mixing PP, a light stabilizer and an antioxidant according to the formula amount to obtain PP powder;
step three, manufacturing a refrigerator wind shielding strip; respectively adding the TPE powder and the PP powder prepared in the step two into a TPE extruder and a PP extruder of co-extrusion equipment for extrusion treatment; wherein, the extrusion temperature range of the TPE is 160-175 ℃, and the extrusion temperature of the PP is 160-180 ℃; converging the extruded product after the extrusion treatment in a co-extrusion die head to obtain a formed wind shielding strip, wherein the temperature of the co-extrusion die head is set to be 170-175 ℃; and (3) sequentially shaping, cooling and cutting the formed wind shielding strip to obtain the wind shielding strip with the preset size for the refrigerator.
The invention has the following beneficial effects:
the invention is prepared by respectively adopting two materials for the fixing structure and the sealing structure, wherein the fixing structure is made of a TPE material, the sealing structure is made of a PP material which has good binding property with the TPE, and then the sealing structure is prepared by proper co-extrusion process conditions, so that the performance of the wind shielding strip meets the sealing requirement of a refrigerator.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of a refrigerator weather strip formed by co-extrusion of two materials according to the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
1-sealing structure, 2-fixing structure.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the invention relates to a refrigerator weather strip formed by co-extruding two materials, which comprises a sealing structure 1 and a fixing structure 2, wherein the sealing structure 1 and the fixing structure 2 are respectively made of different materials; the sealing structure 1 and the fixed structure 2 are integrally formed in a co-extrusion mode, the sealing structure 1 is made of a traditional TPE material, the hardness value of the TPE material is 70-80A, the formula of the TPE material mainly comprises a styrene elastomer, polyethylene, polypropylene, filling oil, inorganic filler and other auxiliaries, wherein the styrene elastomer is styrene TPE (styrene elastomer), also called TPS (styrene-butadiene-styrene) and is a copolymer of butadiene or isoprene and styrene block type; the polyethylene is a thermoplastic resin prepared by polymerizing ethylene, and in the embodiment, high-density polyethylene is selected, and the crystallinity is 80% -90%; polypropylene is a thermoplastic resin prepared by polymerizing propylene, and has a molecular weight of 8 to 15 ten thousand; the inorganic filler is used for keeping the elasticity and the formability of the door seal, other additives comprise pigments, processing aids, stabilizers, coupling agents and the like, the pigments are used for adjusting the color of the door seal, and the pigments can be titanium dioxide pigments.
The fixed structure 2 adopts PP material, the PP material is extrusion agent PP, the molecular weight of the extrusion agent PP is 8-15 ten thousand, the formula of the PP material mainly comprises PP polymer, antioxidant, light stabilizer and pigment, the antioxidant and the light stabilizer are not particularly limited and are suitable for extrusion grade PP, and the pigment can be titanium dioxide pigment.
Preferably, the extender oil is Anhui oil or white oil.
Preferably, the inorganic filler is one of calcium carbonate, talc and barium sulfate.
Preferably, the lubricant is a polyethylene wax or oleamide.
Example one
The TPE material comprises the following raw materials: 90g of styrene elastomer, 20g of polyethylene, 36g of polypropylene, 82g of white oil, 56g of calcium carbonate, 7g of lubricant and titanium pigment are taken.
The PP material comprises the following raw materials: taking 100 parts of PP, 5 parts of antioxidant, 5 parts of light stabilizer and titanium pigment.
A manufacturing process of a refrigerator weather strip formed by co-extrusion of two materials comprises the following steps:
preparing raw materials required by a TPE material and a PP material formula, and weighing;
step two, manufacturing TPE powder; mixing the styrene elastomer and the filling oil in a mixing machine for 10-15min to uniformly mix, then adding the polyethylene, the polypropylene and the inorganic filler in the formula in steps, uniformly mixing and granulating to obtain TPE powder;
manufacturing PP powder; uniformly mixing PP, a light stabilizer and an antioxidant according to the formula amount, and granulating to obtain PP powder;
step three, manufacturing a refrigerator wind shielding strip; respectively adding the TPE powder and the PP powder prepared in the step two into a TPE extruder and a PP extruder of co-extrusion equipment for extrusion treatment; wherein, the TPE extruder is a special double-screw extruder for common soft plastics, the extrusion temperature range of the TPE is 160-175 ℃, the PP extruder is a single-screw extruder, and the extrusion temperature of the PP is 160-180 ℃; converging the extruded product after the extrusion treatment in a co-extrusion die head to obtain a formed wind shielding strip, wherein the temperature of the co-extrusion die head is set to be 170-175 ℃; (ii) a And (3) cooling the formed wind shielding strip by a shaping die and water in a water tank, and finally, vertically cutting the wind shielding strip according to a set size to obtain the wind shielding strip for the refrigerator.
Example two
The TPE material comprises the following raw materials: 92g of styrene elastomer, 17g of polyethylene, 35g of polypropylene, 54g of white oil, 54g of calcium carbonate, 9g of lubricant and titanium pigment are taken.
The PP material comprises the following raw materials: taking 100 parts of PP, 3 parts of antioxidant, 3 parts of light stabilizer and titanium pigment.
A manufacturing process of a refrigerator weather strip formed by co-extrusion of two materials is the same as that of the first embodiment.
EXAMPLE III
The TPE material comprises the following raw materials: 100g of styrene elastomer, 23g of polyethylene, 38g of polypropylene, 68g of white oil, 56g of calcium carbonate, 6g of lubricant and titanium pigment are taken.
The PP material comprises the following raw materials: taking 100 parts of PP, 4 parts of antioxidant, 4 parts of light stabilizer and titanium pigment.
A manufacturing process of a refrigerator weather strip formed by co-extrusion of two materials is the same as that of the first embodiment.
The invention is characterized in that a co-extrusion mode is adopted, thereby not only reducing the cost of the wind shielding strip, but also ensuring the sealing performance of the wind shielding strip.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (6)
1. The utility model provides a refrigerator weather strip by two kinds of materials are crowded formation altogether, includes seal structure (1) and fixed knot structure (2), its characterized in that: the sealing structure (1) and the fixing structure (2) are respectively made of different materials;
the sealing structure (1) is made of a TPE material, and the TPE material comprises the following raw materials in percentage by weight: 25% -40% of styrene elastomer; 3% -10% of polyethylene; 10% -15% of polypropylene; 16% -35% of filling oil; 10-20% of inorganic filler; 2% -5% of a lubricant;
the fixing structure (2) is made of a PP material, and the PP material comprises the following raw materials in parts by weight: 100 parts of PP; 3-5 parts of an antioxidant; 3-5 parts of a light stabilizer.
2. A refrigerator weather strip formed by co-extrusion of two materials according to claim 1, wherein the sealing structure (1) and the fixing structure (2) are integrally formed by co-extrusion.
3. The refrigerator weather strip formed by co-extrusion of two materials as claimed in claim 1, wherein the extender oil is Anhui oil or white oil.
4. The refrigerator weather strip formed by co-extruding the two materials as claimed in claim 1, wherein the inorganic filler is one of calcium carbonate, talc and barium sulfate.
5. The refrigerator weatherstrip formed by co-extruding two materials according to claim 1, wherein said lubricant is polyethylene wax or oleamide.
6. A process for manufacturing a refrigerator weather strip made of a plurality of different materials according to any one of claims 1 to 5, comprising the steps of:
preparing raw materials required by a TPE material and a PP material formula, and weighing;
step two, manufacturing TPE powder; uniformly mixing the styrene elastomer and the filling oil in a mixing machine, then adding the polyethylene, the polypropylene and the inorganic filler in the formula in steps, and uniformly mixing to obtain TPE powder;
manufacturing PP powder; uniformly mixing PP, a light stabilizer and an antioxidant according to the formula amount to obtain PP powder;
step three, manufacturing a refrigerator wind shielding strip; respectively adding the TPE powder and the PP powder prepared in the step two into a TPE extruder and a PP extruder of co-extrusion equipment for extrusion treatment; wherein, the extrusion temperature range of the TPE is 160-175 ℃, and the extrusion temperature of the PP is 160-180 ℃; converging the extruded product after the extrusion treatment in a co-extrusion die head to obtain a formed wind shielding strip, wherein the temperature of the co-extrusion die head is set to be 170-175 ℃; and (3) sequentially shaping, cooling and cutting the formed wind shielding strip to obtain the wind shielding strip with the preset size for the refrigerator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011623188.7A CN112795126A (en) | 2020-12-30 | 2020-12-30 | Refrigerator wind shielding strip formed by co-extrusion of two materials and manufacturing process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011623188.7A CN112795126A (en) | 2020-12-30 | 2020-12-30 | Refrigerator wind shielding strip formed by co-extrusion of two materials and manufacturing process |
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| CN112795126A true CN112795126A (en) | 2021-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011623188.7A Pending CN112795126A (en) | 2020-12-30 | 2020-12-30 | Refrigerator wind shielding strip formed by co-extrusion of two materials and manufacturing process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113478777A (en) * | 2021-07-13 | 2021-10-08 | 深圳市阳林五金塑胶制品有限公司 | Preparation method of anti-collision wrap angle rubber strip and anti-collision wrap angle rubber strip |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102778101A (en) * | 2012-07-27 | 2012-11-14 | 广东顺德安和磁性制品有限公司 | Thermoplastic elastomer (TPE) and modified PP (Polypropylene) co-extruded refrigerator magnetic door seal strip and manufacturing method thereof |
| CN203719299U (en) * | 2014-02-25 | 2014-07-16 | 合肥美菱股份有限公司 | Wind shielding strip for refrigerator |
| CN106403480A (en) * | 2016-09-27 | 2017-02-15 | 合肥华凌股份有限公司 | Door seal and manufacturing method thereof |
| US20180306488A1 (en) * | 2017-04-19 | 2018-10-25 | Criser, S.A. De C.V. | Process for the manufacture of a sealing gasket for a refrigerator |
-
2020
- 2020-12-30 CN CN202011623188.7A patent/CN112795126A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102778101A (en) * | 2012-07-27 | 2012-11-14 | 广东顺德安和磁性制品有限公司 | Thermoplastic elastomer (TPE) and modified PP (Polypropylene) co-extruded refrigerator magnetic door seal strip and manufacturing method thereof |
| CN203719299U (en) * | 2014-02-25 | 2014-07-16 | 合肥美菱股份有限公司 | Wind shielding strip for refrigerator |
| CN106403480A (en) * | 2016-09-27 | 2017-02-15 | 合肥华凌股份有限公司 | Door seal and manufacturing method thereof |
| US20180306488A1 (en) * | 2017-04-19 | 2018-10-25 | Criser, S.A. De C.V. | Process for the manufacture of a sealing gasket for a refrigerator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113478777A (en) * | 2021-07-13 | 2021-10-08 | 深圳市阳林五金塑胶制品有限公司 | Preparation method of anti-collision wrap angle rubber strip and anti-collision wrap angle rubber strip |
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