CN112391025A - Antibacterial TPE door seal and preparation method thereof - Google Patents
Antibacterial TPE door seal and preparation method thereof Download PDFInfo
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- CN112391025A CN112391025A CN202011302122.8A CN202011302122A CN112391025A CN 112391025 A CN112391025 A CN 112391025A CN 202011302122 A CN202011302122 A CN 202011302122A CN 112391025 A CN112391025 A CN 112391025A
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- door seal
- tpe
- antibacterial
- antimicrobial
- styrene
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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
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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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
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention discloses an antibacterial TPE door seal and a preparation method thereof, and relates to the technical field of door seals. The antibacterial TPE door seal provided by the invention comprises the following components in percentage by mass: 25 to 40 percent of styrene elastomer; 3 to 10 percent of polyethylene; 10 to 15 percent of polypropylene; 3 to 10 percent of antibacterial agent; the antibacterial agent is nano zinc oxide or zinc oxide whisker; 16% -35% of filling oil; 10 to 20 percent of inorganic filler; 2 to 5 percent of lubricant. According to the invention, the nanometer zinc oxide or the zinc oxide whisker is used as the antibacterial agent, so that the long-acting antibacterial effect of the TPE door seal is realized, and the problems of poor long-term stability, poor heat resistance and low sterilization efficiency of the existing door seal are solved.
Description
Technical Field
The invention belongs to the technical field of door seals, and particularly relates to an antibacterial TPE door seal and a preparation method thereof.
Background
In the refrigerator industry, door seals are mostly made of polyvinyl chloride (PVC) resin. However, the refrigerator door seal made of the PVC material has poor high-temperature and low-temperature performance, and under the long-term use condition of a user, the PVC door seal becomes hard, the low-temperature effect becomes worse and worse, the refrigeration effect of the refrigerator is affected, and the energy consumption of the refrigerator is greatly improved.
In recent years, in order to solve the problem of PVC door seals, there are refrigerator door seals made of thermoplastic elastomer (hereinafter referred to as TPE), which have high elasticity and strength of rubber at normal temperature and are made of high polymer materials that can be plasticized like thermoplastic resin at high temperature. The door seal strip made of the TPE material solves the problem that the PVC door seal is poor in door seal performance after long-term use, but a plasticizer is also present in the formula of the TPE door seal strip, and is a nutrient substance of bacteria and mould, so that the TPE door seal is easy to corrode the bacteria and the mould to generate a mould phenomenon.
Commonly used antimicrobial agents for plastics include inorganic antimicrobial agents, organic antimicrobial agents, and natural antimicrobial agents. The inorganic antibacterial agent is mainly the antibacterial agent type represented by metals such as silver, copper and the like, in particular to a silver ion antibacterial agent which has a dominant role in inorganic antibacterial; the organic antibacterial agent is mainly micromolecular organic matter such as imidazoles, thiazoles, quaternary ammonium salts and the like; the natural antibacterial agent is mainly extracted from natural plants, such as chitin, mustard, castor oil, horseradish, etc.; however, these types of antibacterial agents have their own disadvantages in plastic applications, such as incompatibility between silver ion antibacterial agents and plastic particles, environmental protection limit requirements, and the like, easy precipitation of small organic molecule antibacterial agents, poor long-term stability, poor heat resistance of natural antibacterial agents, low sterilization efficiency, and the like. Based on the situation, the development of the long-acting antibacterial TPE door seal has great manufacturing influence and great significance on health and safety.
Disclosure of Invention
The invention aims to provide an antibacterial TPE door seal, which realizes the long-acting antibacterial effect of the TPE door seal by taking nano zinc oxide or zinc oxide whiskers as an antibacterial agent, and solves the problems of poor long-term stability, poor heat resistance and low sterilization efficiency of the existing door seal.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to an antibacterial TPE door seal, which comprises the following components in percentage by mass:
further, the styrene elastomer is a styrene-butadiene-styrene block copolymer, an isoprene-substituted butadiene block styrene polymer, a hydrogenated styrene-butadiene block copolymer, or polystyrene-polyethylene propylene-polystyrene.
Further, the crystallinity of the polyethylene is 80% to 90%.
Further, the extender oil is naphthenic oil or white oil.
Further, the inorganic filler is calcium carbonate, talcum powder or barium sulfate with the mesh size of more than 2000.
Further, the lubricant is polyethylene wax or oleamide.
Further, the antibacterial TPE door seal comprises pigment and a stabilizer.
A preparation method of an antibacterial TPE door seal strip comprises the following steps:
the method comprises the following steps: the styrene elastomer and the extender oil in the formula amount are mixed uniformly.
Step two: adding polyethylene, polypropylene, an antibacterial agent, an inorganic filler and a lubricant according to the formula ratio, and uniformly mixing to obtain a powder mixture; at the same time, pigment and/or stabilizer can be added, so that the antibacterial TPE door seal with different colors can be obtained.
Step three: extruding and granulating the powdery mixture to obtain antibacterial TPE granules; wherein the extrusion temperature is 160-175 ℃.
Step four: and extruding, drawing, cooling, cutting, installing magnetic strips, welding and the like on the door seal production line to obtain the TPE door seal. Wherein the extrusion temperature of the door seal is 160-175 ℃.
The invention has the following beneficial effects:
according to the invention, the nanometer zinc oxide or the zinc oxide whisker is used as the antibacterial agent and is added into the TPE granular material formula in a proper proportion, so that the TPE door seal strip can achieve a long-term antibacterial effect, and the antibacterial effect and the sterilization efficiency of the TPE door seal strip are effectively improved. Meanwhile, the long-term stability and the heat resistance of the antibacterial TPE door seal strip are effectively guaranteed.
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.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.
Example 1
The formula of the antibacterial TPE door seal provided by the invention comprises the following components: 90g of styrene elastomer, 18g of polyethylene, 32g of polypropylene, 20g of zinc oxide whisker, 80g of white oil, 53g of calcium carbonate, 7g of lubricant, pigment and stabilizer or other auxiliary agents, and the adding amount of each raw material is enlarged according to the output during specific production.
A preparation method of the antibacterial TPE door seal strip comprises the following steps:
the method comprises the following steps: mixing the styrene elastomer and the filling oil in a formula ratio in a high-speed mixer for 15 minutes to uniformly mix the styrene elastomer and the filling oil;
step two: adding polyethylene, polypropylene, an antibacterial agent, an inorganic filler and a lubricant according to the formula ratio, and uniformly mixing to obtain a powder mixture;
step three: plasticizing and extruding the powdery mixture by a double screw to granulate to obtain the antibacterial TPE granules; wherein the double-screw plasticizing extrusion temperature is 160-175 ℃, such as 165 ℃, 168 ℃ or 170 ℃.
Step four: and extruding, drawing, cooling, cutting, installing magnetic strips, welding and the like on a door seal production line to obtain the TPE door seal for the refrigerator or the freezer. Wherein the extrusion temperature of the door seal is 160-175 ℃, such as 162 ℃, 166 ℃ or 172 ℃.
Example 2
The formula of the antibacterial TPE door seal provided by the invention comprises the following components: 95g of styrene elastomer, 10g of polyethylene, 40g of polypropylene, 15g of zinc oxide whisker, 70g of naphthenic oil, 60g of calcium carbonate and 10g of lubricant, as well as pigment and stabilizer, or other auxiliary agents. The preparation method comprises the following steps: the same as in example 1.
Example 3
The formula of the antibacterial TPE door seal provided by the invention comprises the following components: 100g of styrene elastomer, 20g of polyethylene, 30g of polypropylene, 13g of nano zinc oxide, 69g of naphthenic oil, 60g of talcum powder, 8g of lubricant, pigment and stabilizer, or other auxiliary agents. The preparation method comprises the following steps: the same as in example 1.
Comparative example
The raw material formula is as follows: 100g of styrene elastomer, 20g of polyethylene, 30g of polypropylene, 0g of antibacterial agent, 62g of naphthenic oil, 70g of talcum powder, 8g of lubricant and proper amount of pigment and stabilizer or other auxiliary agents. The preparation method comprises the following steps: the same as in example 1.
The evaluation method comprises the following steps: the main performances of the TPE door seal material obtained in the examples 1-3 and the comparative example are tested. Wherein, the mechanical property test comprises a density test (according to the national standard GB1033), a Shore hardness test (according to the national standard GB2411), a tensile strength test (according to the national standard GB1040), an elongation at break test (according to the national standard GB1040), and a hardness change rate test (according to the national standard GB 2411); the antibacterial and mildewproof test is in accordance with the GB21551.2-2010 test standard. The test results are shown in table 1. comparison of properties:
TABLE 1 comparison of Properties
| Test results | Unit of | Example 1 | Example 2 | Example 3 | Comparative example |
| Density of | g/cm3 | 0.90 | 0.92 | 0.94 | 0.94 |
| Shore hardness | ShoreA | 68 | 70 | 72 | 72 |
| Tensile strength | MPa | 8.04 | 8.10 | 8.15 | 8.15 |
| Elongation at break | ％ | 615 | 614 | 625 | 624 |
| Rate of change of hardness | ％ | 6.2 | 6.2 | 6.1 | 6.1 |
| Antibacterial rate | ％ | 99.9 | 99.6 | 99.3 | 20 |
| Mildew resistance rating | / | Level 0 | Level 0 | Level 0 | 4 stage |
And (3) mildew-proof grade:
and (4) conclusion: the results of the embodiments 1-3 show that the antibacterial TPE door seal strip prepared by the formula disclosed by the invention has good antibacterial and mildewproof properties, the antibacterial rate reaches over 99%, and the mildewproof grade reaches 0 level.
Meanwhile, the data in table 1 show that the door seal prepared in the embodiment 1-3 has little change in the main conventional performance compared with the comparative example after the antibacterial agent is added, so that the antibacterial TPE door seal provided by the invention can meet other performance requirements of the door seal while having a long-acting antibacterial effect.
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 (9)
1. The utility model provides an antibiotic TPE door strip of paper used for sealing which characterized in that: the method comprises the following steps of:
2. the antimicrobial TPE door seal of claim 1 wherein the styrenic elastomer is styrene-butadiene-styrene block copolymer, isoprene substituted butadiene block styrene polymer, hydrogenated styrene-butadiene block copolymer or polystyrene-polyethylene propylene-polystyrene.
3. The antimicrobial TPE door seal according to claim 1, wherein the polyethylene has a crystallinity of 80% to 90%.
4. The antimicrobial TPE door seal of claim 1 wherein the extender oil is naphthenic or white oil.
5. The antimicrobial TPE door seal according to claim 1, wherein the inorganic filler is calcium carbonate, talc or barium sulfate of 2000 mesh or above.
6. The antimicrobial TPE door seal of claim 1 wherein the lubricant is polyethylene wax or oleamide.
7. The antimicrobial TPE door seal according to any one of claims 1 to 6, comprising pigments and stabilizers.
8. A preparation method of an antibacterial TPE door seal is characterized by comprising the following steps:
the method comprises the following steps: uniformly mixing the styrene elastomer and the filling oil according to the formula ratio;
step two: adding polyethylene, polypropylene, an antibacterial agent, an inorganic filler and a lubricant according to the formula ratio, and uniformly mixing to obtain a powder mixture;
step three: extruding and granulating the powdery mixture to obtain antibacterial TPE granules; wherein the extrusion temperature is 160-175 ℃;
step four: processing the antibacterial TPE granules on a door seal production line to obtain a TPE door seal; wherein the extrusion temperature of the door seal is 160-175 ℃.
9. The method of claim 8, wherein pigments and/or stabilizers are optionally added in step two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011302122.8A CN112391025A (en) | 2020-11-19 | 2020-11-19 | Antibacterial TPE door seal and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011302122.8A CN112391025A (en) | 2020-11-19 | 2020-11-19 | Antibacterial TPE door seal and preparation method thereof |
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| Publication Number | Publication Date |
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| CN112391025A true CN112391025A (en) | 2021-02-23 |
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| CN202011302122.8A Pending CN112391025A (en) | 2020-11-19 | 2020-11-19 | Antibacterial TPE door seal and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120053285A1 (en) * | 2009-05-20 | 2012-03-01 | West Pharmaceutical Services, Inc. | Tpe composition having good reseal, articles produced therefrom, and method |
| CN104341650A (en) * | 2013-08-06 | 2015-02-11 | 徐州农丰塑料有限公司 | Antibacterial plastic |
| CN109942975A (en) * | 2019-03-04 | 2019-06-28 | 合肥华凌股份有限公司 | Gasket and its feedstock composition, production method |
| CN110066459A (en) * | 2019-04-18 | 2019-07-30 | 青岛拜士特新材料有限公司 | A kind of antibacterial matrices and preparation method of sustained-release antibacterial |
-
2020
- 2020-11-19 CN CN202011302122.8A patent/CN112391025A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120053285A1 (en) * | 2009-05-20 | 2012-03-01 | West Pharmaceutical Services, Inc. | Tpe composition having good reseal, articles produced therefrom, and method |
| CN104341650A (en) * | 2013-08-06 | 2015-02-11 | 徐州农丰塑料有限公司 | Antibacterial plastic |
| CN109942975A (en) * | 2019-03-04 | 2019-06-28 | 合肥华凌股份有限公司 | Gasket and its feedstock composition, production method |
| CN110066459A (en) * | 2019-04-18 | 2019-07-30 | 青岛拜士特新材料有限公司 | A kind of antibacterial matrices and preparation method of sustained-release antibacterial |
Non-Patent Citations (1)
| Title |
|---|
| 汪多仁: "《绿色化工助剂》", 31 January 2006, 科学技术文献出版社 * |
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Application publication date: 20210223 |