CN113214559A - Mildew-proof antibacterial EVA foaming material and production process thereof - Google Patents
Mildew-proof antibacterial EVA foaming material and production process thereof Download PDFInfo
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- CN113214559A CN113214559A CN202110253725.1A CN202110253725A CN113214559A CN 113214559 A CN113214559 A CN 113214559A CN 202110253725 A CN202110253725 A CN 202110253725A CN 113214559 A CN113214559 A CN 113214559A
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- 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
- C08J9/10—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 nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
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- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
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- 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
- C08J2323/08—Copolymers of ethene
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- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—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
- C08J2423/04—Homopolymers or copolymers of ethene
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- C08J2439/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen; Derivatives of such polymers
- C08J2439/04—Homopolymers or copolymers of monomers containing heterocyclic rings having nitrogen as ring member
- C08J2439/06—Homopolymers or copolymers of N-vinyl-pyrrolidones
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- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
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Abstract
The invention discloses a mildew-proof antibacterial EVA foaming material and a production process thereof, wherein the mildew-proof antibacterial EVA foaming material comprises the following raw materials in parts by weight: 40-50 parts of ethylene-vinyl acetate copolymer, 15-25 parts of ethylene-octene copolymer, 3-5 parts of polyethylene, 3-8 parts of bactericide, 1-5 parts of antioxidant, 0.5-1.5 parts of cross-linking agent and 2-5 parts of foaming agent. The prepared EVA foaming material has a good antibacterial function, can obviously play an antibacterial role, has long-term antibacterial property, is added with a bactericide to enhance the antibacterial property and slow resilience of the whole material, has excellent mildew-proof antibacterial property, and is high in impact strength and tearing strength.
Description
Technical Field
The invention relates to the technical field of plastics, in particular to a mildew-proof antibacterial EVA foaming material and a production process thereof.
Background
EVA is copolymerized by ethylene and acetic acid, and has the Chinese cultural name: ethylene-vinyl acetate copolymers (ethylene-vinyl acetate copolymers). The EVA has wide application fields, the annual market consumption of China is continuously increased, and the EVA is particularly applied to soles and interior materials of high-grade sneakers, climbing shoes, slippers and sandals in the shoe manufacturing industry.
In the prior art, EVA is widely used and is often used in foaming materials, but the compatibility between the EVA material and an inorganic antibacterial agent at the present stage is poor, so that improvement is made on the compatibility, and a mildew-proof antibacterial EVA foaming material and a production process thereof are provided.
Disclosure of Invention
In order to solve the technical problems, the invention provides the following technical scheme:
the mildew-proof antibacterial EVA foaming material comprises the following raw materials in parts by weight: 40-50 parts of ethylene-vinyl acetate copolymer, 15-25 parts of ethylene-octene copolymer, 3-5 parts of polyethylene, 3-8 parts of bactericide, 1-5 parts of antioxidant, 0.5-1.5 parts of cross-linking agent and 2-5 parts of foaming agent.
As a preferred technical scheme of the invention, the ethylene-vinyl acetate copolymer has the vinyl acetate content of 5-40%.
In a preferred embodiment of the present invention, the antioxidant is at least one selected from phenols, phosphites, and thioesters, the antioxidant is one or a combination of antioxidant 1010, antioxidant BHT, and antioxidant 168, the blowing agent is azodicarbonamide, and the crosslinking assistant is triallyl isocyanurate.
According to the preferable technical scheme, the bactericide is silicon dioxide, the silicon dioxide is formed by mixing nano silicon dioxide, a coupling agent, a silver compound and a complexing agent according to the proportion of 50:1:2:3, the silver compound is silver nitrate, the complexing agent is polyvinylpyrrolidone, and the coupling agent is one or the combination of silane coupling agents KH550, KH560, KH570, A151 or A171.
The production process of the mildew-proof antibacterial EVA foaming material comprises the following steps:
the method comprises the following steps: placing the ethylene-vinyl acetate copolymer into an internal mixer, adjusting the internal mixing temperature to 95-98 ℃, keeping for 4-6 minutes, adding the ethylene-octene copolymer, polyethylene, bactericide, antioxidant, cross-linking agent and foaming agent, internally mixing again, mixing and internally mixing to 100 ℃, keeping for 5 minutes, turning once when the internal mixing temperature rises to 2 ℃, and pouring when the internal mixing temperature is 135 ℃;
step two: extruding the poured raw materials by a double-screw extruder, rolling the raw materials into sheets in an open mill, vulcanizing and molding the sheets by a lower mold, wherein the thickness of the sheets is 1.5 mm.
As a preferred technical scheme of the invention, in the second step, the length-diameter ratio of the screw of the double-screw extruder is 44: 1-48: 1, and a cylinder of the double-screw extruder is provided with a side feeding port.
In the second step, the vulcanization is carried out by sealing and pressurizing 80-150 kg/mm, and heating at 130-180 ℃, and the vulcanization is carried out automatically in about 2-15 minutes.
The invention has the beneficial effects that: according to the mildew-proof antibacterial EVA foaming material and the production process thereof, the prepared EVA foaming material has a good antibacterial function, can obviously play an antibacterial role, has long-term antibacterial property, is added with a bactericide to enhance the antibacterial property and slow resilience of the whole material, has excellent mildew-proof antibacterial property, and is high in impact strength and tear strength;
the volume shrinkage is extremely small, the production efficiency is improved, the production cost is reduced, and the reliable use in the fields of high-voltage transmission cables, polyolefin seals of building doors and windows, polyolefin parts of vehicles, electronics and the like can be met; the service life is longer, the comprehensive performance is good, the use requirement of the living or industrial environment can be met, and the application prospect and the market demand are wide.
Detailed Description
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the invention.
Example one
The invention relates to a mildew-proof antibacterial EVA foaming material and a production process thereof, wherein the mildew-proof antibacterial EVA foaming material comprises the following raw materials in parts by weight: 40 parts of ethylene-vinyl acetate copolymer, 15 parts of ethylene-octene copolymer, 3 parts of polyethylene, 3 parts of bactericide, 1 part of antioxidant, 0.5 part of cross-linking agent and 2 parts of foaming agent.
The preparation method comprises the following steps:
the method comprises the following steps: placing the ethylene-vinyl acetate copolymer into an internal mixer, adjusting the internal mixing temperature to 95 ℃, keeping for 4 minutes, adding the ethylene-octene copolymer, polyethylene, bactericide, antioxidant, cross-linking agent and foaming agent, internally mixing again, mixing and internally mixing to 100 ℃, keeping for 5 minutes, turning once when the internal mixing temperature rises to 2 ℃, and pouring when the internal mixing temperature is 135 ℃;
step two: extruding the poured raw materials by a double-screw extruder, rolling the raw materials into sheets in an open mill, vulcanizing and molding the sheets by a lower mold, wherein the thickness of the sheets is 1.5 mm.
Example two
The invention relates to a mildew-proof antibacterial EVA foaming material and a production process thereof, wherein the mildew-proof antibacterial EVA foaming material comprises the following raw materials in parts by weight: 45 parts of ethylene-vinyl acetate copolymer, 20 parts of ethylene-octene copolymer, 4 parts of polyethylene, 6 parts of bactericide, 3 parts of antioxidant, 1 part of cross-linking agent and 3 parts of foaming agent.
The preparation method comprises the following steps:
the method comprises the following steps: placing the ethylene-vinyl acetate copolymer into an internal mixer, adjusting the internal mixing temperature to be 96 ℃, keeping for 5 minutes, adding the ethylene-octene copolymer, polyethylene, bactericide, antioxidant, cross-linking agent and foaming agent, internally mixing again, mixing and internally mixing to 100 ℃, keeping for 5 minutes, turning once when the internal mixing temperature rises to 2 ℃, and pouring when the internal mixing temperature is 135 ℃;
step two: extruding the poured raw materials by a double-screw extruder, rolling the raw materials into sheets in an open mill, vulcanizing and molding the sheets by a lower mold, wherein the thickness of the sheets is 1.5 mm.
EXAMPLE III
The invention relates to a mildew-proof antibacterial EVA foaming material and a production process thereof, wherein the mildew-proof antibacterial EVA foaming material comprises the following raw materials in parts by weight: 50 parts of ethylene-vinyl acetate copolymer, 25 parts of ethylene-octene copolymer, 5 parts of polyethylene, 8 parts of bactericide, 5 parts of antioxidant, 1.5 parts of cross-linking agent and 5 parts of foaming agent.
The preparation method comprises the following steps:
the method comprises the following steps: placing the ethylene-vinyl acetate copolymer into an internal mixer, adjusting the internal mixing temperature to 95 ℃, keeping for 4 minutes, adding the ethylene-octene copolymer, polyethylene, bactericide, antioxidant, cross-linking agent and foaming agent, internally mixing again, mixing and internally mixing to 100 ℃, keeping for 5 minutes, turning once when the internal mixing temperature rises to 2 ℃, and pouring when the internal mixing temperature is 135 ℃;
step two: extruding the poured raw materials by a double-screw extruder, rolling the raw materials into sheets in an open mill, vulcanizing and molding the sheets by a lower mold, wherein the thickness of the sheets is 1.5 mm.
Example four
The invention relates to a mildew-proof antibacterial EVA foaming material and a production process thereof, wherein the mildew-proof antibacterial EVA foaming material comprises the following raw materials in parts by weight: 46 parts of ethylene-vinyl acetate copolymer, 20 parts of ethylene-octene copolymer, 4 parts of polyethylene, 5 parts of bactericide, 3 parts of antioxidant, 0.9 part of cross-linking agent and 3 parts of foaming agent.
The preparation method comprises the following steps:
the method comprises the following steps: placing the ethylene-vinyl acetate copolymer into an internal mixer, adjusting the internal mixing temperature to be 96 ℃, keeping for 5 minutes, adding the ethylene-octene copolymer, polyethylene, bactericide, antioxidant, cross-linking agent and foaming agent, internally mixing again, mixing and internally mixing to 100 ℃, keeping for 5 minutes, turning once when the internal mixing temperature rises to 2 ℃, and pouring when the internal mixing temperature is 135 ℃;
step two: extruding the poured raw materials by a double-screw extruder, rolling the raw materials into sheets in an open mill, vulcanizing and molding the sheets by a lower mold, wherein the thickness of the sheets is 1.5 mm.
EXAMPLE five
The invention relates to a mildew-proof antibacterial EVA foaming material and a production process thereof, wherein the mildew-proof antibacterial EVA foaming material comprises the following raw materials in parts by weight: 50 parts of ethylene-vinyl acetate copolymer, 25 parts of ethylene-octene copolymer, 5 parts of polyethylene, 8 parts of bactericide, 5 parts of antioxidant, 1.5 parts of cross-linking agent and 5 parts of foaming agent.
The preparation method comprises the following steps:
the method comprises the following steps: placing the ethylene-vinyl acetate copolymer into an internal mixer, adjusting the internal mixing temperature to 98 ℃, keeping for 6 minutes, adding the ethylene-octene copolymer, polyethylene, bactericide, antioxidant, cross-linking agent and foaming agent, internally mixing again, mixing and internally mixing to 100 ℃, keeping for 5 minutes, turning once when the internal mixing temperature rises to 2 ℃, and pouring when the internal mixing temperature is 135 ℃;
step two: extruding the poured raw materials by a double-screw extruder, rolling the raw materials into sheets in an open mill, vulcanizing and molding the sheets by a lower mold, wherein the thickness of the sheets is 1.5 mm.
Selecting the same product with relatively high market sales volume, respectively weighing 0.1 g of the sample of the embodiment and the sample of the control group, and respectively carrying out antibacterial property test detection to obtain the following detection results:
the table shows that the bactericide does not have adverse effect, the modified EVA can be better in dispersion property and extremely small in volume shrinkage rate by adding the coupling agent, the production efficiency is improved, the production cost is reduced, and the characteristics of reliable use in the fields of high-voltage cables, building door and window polyolefin seals, vehicle polyolefin parts, electronics and electrics and the like can be met; the service life is longer, the comprehensive performance is good, the use requirement of life or industrial environment can be met, and the application prospect and market demand are wide.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements can be directly connected with each other or indirectly connected with each other through an intermediate medium, and the two elements can be communicated with each other. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention shall be included in the protection of the present invention.
Claims (7)
1. The mildew-proof antibacterial EVA foaming material is characterized by comprising the following raw materials in parts by weight: 40-50 parts of ethylene-vinyl acetate copolymer, 15-25 parts of ethylene-octene copolymer, 3-5 parts of polyethylene, 3-8 parts of bactericide, 1-5 parts of antioxidant, 0.5-1.5 parts of cross-linking agent and 2-5 parts of foaming agent.
2. The mildew-proof and antibacterial EVA foaming material of claim 1, wherein the ethylene-vinyl acetate copolymer has a vinyl acetate content of 5-40%.
3. The mildew-proof and antibacterial EVA foaming material of claim 1, wherein the antioxidant is at least one selected from phenols, phosphites and thioesters, the antioxidant is one or a combination of antioxidant 1010, antioxidant BHT or antioxidant 168, the foaming agent is azodicarbonamide, and the crosslinking assistant is triallyl isocyanurate.
4. The mildew-proof antibacterial EVA foaming material of claim 1, wherein the bactericide is silicon dioxide, the silicon dioxide is prepared by mixing nano silicon dioxide, a coupling agent, a silver compound and a complexing agent according to a ratio of 50:1:2:3, the silvered matter is silver nitrate, the complexing agent is polyvinylpyrrolidone, and the coupling agent is one or a combination of silane coupling agents KH550, KH560, KH570, A151 or A171.
5. The production process of the mildew-proof antibacterial EVA foaming material is characterized by comprising the following steps of:
the method comprises the following steps: placing the ethylene-vinyl acetate copolymer into an internal mixer, adjusting the internal mixing temperature to 95-98 ℃, keeping for 4-6 minutes, adding the ethylene-octene copolymer, polyethylene, a bactericide, an antioxidant, a cross-linking agent and a foaming agent, carrying out internal mixing again, mixing and internal mixing to 100 ℃, keeping for 5 minutes, turning once when the internal mixing temperature rises to 2 ℃, and pouring when the internal mixing temperature is 135 ℃;
step two: extruding the poured raw materials by a double-screw extruder, rolling the raw materials into sheets in an open mill, vulcanizing and molding the sheets by a lower mold, wherein the thickness of the sheets is 1.5 mm.
6. The production process of the mildew-proof antibacterial EVA foaming material as claimed in claim 5, wherein in the second step, the length-diameter ratio of a screw of the double-screw extruder is 44: 1-48: 1, and a barrel of the double-screw extruder is provided with a side feeding port.
7. The production process of the mildew-proof antibacterial EVA foaming material of claim 5, wherein in the second step, the vulcanization is carried out by sealing and pressurizing for 80-150 kg/mm, and heating at 130-180 ℃, and the vulcanization is carried out automatically in about 2-15 minutes.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114316339A (en) * | 2021-12-07 | 2022-04-12 | 茂泰(福建)鞋材有限公司 | Antibacterial EVA (ethylene-vinyl acetate copolymer) foamed sole and preparation method thereof |
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|---|---|---|---|---|
| CN102532675A (en) * | 2011-12-16 | 2012-07-04 | 蔡龙源 | Foaming material for shoes |
| CN103756111A (en) * | 2013-12-18 | 2014-04-30 | 福州大学 | Antibacterial and antistatic EVA/starch/PE composite foaming material and preparation method thereof |
| CN105199213A (en) * | 2015-08-21 | 2015-12-30 | 浙江隆源高分子科技有限公司 | Flame-retardant EVA (Ethylene Vinyl Acetate) foaming sole material and preparation method thereof |
| CN107722442A (en) * | 2017-11-06 | 2018-02-23 | 福建嘉怡塑胶有限公司 | A kind of EVA composition, foams and preparation method thereof |
| CN108752726A (en) * | 2018-06-13 | 2018-11-06 | 福建三盛实业有限公司 | A kind of novel antibacterial EVA expanded materials and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114316339A (en) * | 2021-12-07 | 2022-04-12 | 茂泰(福建)鞋材有限公司 | Antibacterial EVA (ethylene-vinyl acetate copolymer) foamed sole and preparation method thereof |
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Application publication date: 20210806 |