CN110643107A - Mildew-proof antibacterial transparent PEVA film and preparation process thereof - Google Patents
Mildew-proof antibacterial transparent PEVA film and preparation process thereof Download PDFInfo
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- CN110643107A CN110643107A CN201911028188.XA CN201911028188A CN110643107A CN 110643107 A CN110643107 A CN 110643107A CN 201911028188 A CN201911028188 A CN 201911028188A CN 110643107 A CN110643107 A CN 110643107A
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- 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
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- 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
- C08J2323/08—Copolymers of ethene
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- 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
- 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
- C08J2423/06—Polyethene
Abstract
The invention discloses a mildew-proof antibacterial transparent PEVA film and a preparation process thereof, the mildew-proof antibacterial transparent PEVA film comprises 35-50 parts of PE polyethylene, 45-55 parts of EVA ethylene-vinyl acetate copolymer, 20-30 parts of low-density polyethylene, 10-16 parts of vinyl acetate, 5-10 parts of a special mildew-proof antibacterial agent, 5-8 parts of thiol group, 8-10 parts of graphene powder, 3-6 parts of a flame retardant, 2-6 parts of a stabilizer, 3-5 parts of a defoaming agent, the mildew-proof antibacterial transparent PEVA film contains vinyl acetate, the PEVA film improves the transparency, softness and toughness of the PEVA film by increasing the content of the vinyl acetate of the PEVA film, the PEVA film is required to be heated and melted firstly when the PEVA film is processed and molded, and the defoaming agent and the stabilizer are added into the raw material, softness and toughness, and increase the application range of the PEVA film.
Description
Technical Field
The invention relates to the technical field of pipe piles, in particular to a mildew-proof and antibacterial transparent PEVA film and a preparation process thereof.
Background
PEVA, polyethylene-vinyl acetate, is a blend of PE and EVA, and has good flexibility and little elasticity, where the higher the proportion of PE, the more difficult the adhesion is to handle, and is commonly used to produce films.
PE = Polyethylene, which is the simplest polymer organic compound in structure, and is the most widely used polymer material in the world today, and is polymerized from ethylene, and is classified into high density Polyethylene, medium density Polyethylene, and low density Polyethylene according to the difference in density.
The low-density polyethylene is softer and is polymerized under high pressure for multiple purposes; high density polyethylene has characteristics of high rigidity, hardness and mechanical strength, and is used in low pressure polymerization. The high-density polyethylene can be used as a container and a pipeline, and also can be used as a high-frequency electric insulating material for radars and televisions. A commonly used high-density (high-pressure) polyethylene is used in large quantities. Polyethylene is waxy, has a smooth feel like wax, and when undyed, low density polyethylene is clear, while high density polyethylene is opaque. Polyethylene is a highly polymerized chain of repeating-CH 2-units linked by addition and polymerization of ethylene (CH2= CH 2). The properties of polyethylene depend on its mode of polymerization; Ziegler-Natta polymerizations conducted under moderate pressure (15-30 atmospheres) organic compound catalyzed conditions are High Density Polyethylene (HDPE). The polyethylene molecules polymerized under such conditions are linear and have long molecular chains, up to several hundred thousand. If the free radical polymerization is carried out under the conditions of high pressure (100-300MPa), high temperature (190-210C) and peroxide catalysis, the Low Density Polyethylene (LDPE) is produced, and the LDPE is of a branched structure.
Polyethylene is insoluble in water and has little water absorption, namely, some chemical solvents, such as toluene, acetic acid and the like, can be slightly dissolved only at the temperature of more than 70 ℃. However, the fine-particle polyethylene can be melted or solidified with the temperature change between 15 ℃ and 40 ℃, and the fine-particle polyethylene is melted when the temperature rises and absorbs heat; when the temperature is reduced, the material is solidified and releases heat. And because it has small water absorption, is not easy to be wet and has insulating property. Therefore, it is a good building material.
However, the current PEVA film has a mildew-proof function, some PEVA films have an antibacterial function, the transparency of some PEVA films is higher, and the functions of the PEVA films are single.
Disclosure of Invention
The invention aims to provide a mildew-proof and antibacterial transparent PEVA film and a preparation process thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a mildew-proof antibacterial transparent PEVA film comprises 35-50 parts of PE polyethylene, 45-55 parts of EVA ethylene-vinyl acetate copolymer, 20-30 parts of low-density polyethylene, 10-16 parts of vinyl acetate, 5-10 parts of a special mildew-proof antibacterial agent, 5-8 parts of a thiol-containing group, 8-10 parts of graphene powder, 3-6 parts of a flame retardant, 2-6 parts of a stabilizer and 3-5 parts of a defoaming agent.
Preferably, 36 parts of PE polyethylene, 45 parts of EVA ethylene-vinyl acetate copolymer, 20 parts of low-density polyethylene, 11 parts of vinyl acetate, 6 parts of a special mildew-proof antibacterial agent, 6 parts of a thiol-containing group, 8 parts of graphene powder, 3 parts of a flame retardant, 3 parts of a stabilizer and 4 parts of a defoaming agent.
Preferably, the special mildewproof antibacterial agent contains an inorganic antibacterial agent, a metal ion antibacterial agent, a phenol antibacterial agent or polyvinyl pyridine.
Preferably, the flame retardant is tributyl phosphate, tri (2-ethylhexyl) phosphate, tri (2-chloroethyl) phosphate, tri (2, 3-dichloropropyl) phosphate and tri (2, 3-dibromopropyl) phosphate of alkyl phosphate;
or dicyclopentadiene chlordanic anhydride, aliphatic halogenated hydrocarbon, dibromomethane, trichlorobromomethane, dichlorobromomethane, octabromodiphenyl oxide, pentabromoethylbenzene, tetrabromobisphenol A and other aromatic bromides.
Preferably, the stabilizer is one or a mixture of several of lead salt, metal soap, organic tin, organic antimony, organic rare earth and pure organic compounds.
Preferably, the defoaming agent is polydimethylsiloxane.
Preferably, the mildew-proof antibacterial transparent PEVA film and the preparation process thereof comprise the following steps:
A. firstly, preparing PE polyethylene, EVA ethylene-vinyl acetate copolymer, low-density polyethylene and vinyl acetate according to a certain proportion, putting the mixture into a melting device, heating for melting, and maintaining the PEVA film production raw material in a molten state for 10-15min after the material is melted;
B. sequentially adding a flame retardant and a stabilizer into a PEVA film raw material in a molten state;
C. when the temperature of the PEVA film raw material is reduced to 180 ℃ of 160-;
D. injecting the PEVA film raw material into a film forming die, and preparing the PEVA film through a casting film forming process.
Preferably, the heating melting temperature of the PE polyethylene, the EVA ethylene-vinyl acetate copolymer and the low-density polyethylene is 280-300 ℃, and the proportion of the PE polyethylene, the EVA ethylene-vinyl acetate copolymer and the low-density polyethylene is 5:6: 3.
Preferably, the vinyl acetate is obtained by heating butene-3-nitrile and concentrated hydrochloric acid together, generating a large amount of ammonium chloride precipitate after reaction, quickly raising the temperature, adding water after reflux reaction for 15min, separating an upper acid layer, carrying out reduced pressure distillation, and collecting a fraction of 70-72 ℃ (1.2 kPa).
Compared with the prior art, the invention has the beneficial effects that:
the PEVA film prepared by the invention has good transparency, softness and toughness, and the application range of the PEVA film is increased.
Detailed Description
The technical solutions in the embodiments of the present invention are 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.
The invention provides the following technical scheme: a mildew-proof antibacterial transparent PEVA film comprises 35-50 parts of PE polyethylene, 45-55 parts of EVA ethylene-vinyl acetate copolymer, 20-30 parts of low-density polyethylene, 10-16 parts of vinyl acetate, 5-10 parts of a special mildew-proof antibacterial agent, 5-8 parts of a thiol-containing group, 8-10 parts of graphene powder, 3-6 parts of a flame retardant, 2-6 parts of a stabilizer and 3-5 parts of a defoaming agent.
The polyethylene-ethylene-vinyl acetate copolymer.
When the transparent PEVA film is prepared, a special mildew-proof antibacterial agent containing an inorganic antibacterial agent, a metal ion antibacterial agent, a phenol antibacterial agent or polyvinyl pyridine is selected.
The flame retardant used for the transparent PEVA film is one of alkyl phosphate tributyl phosphate, tri (2-ethylhexyl) phosphate, tri (2-chloroethyl) phosphate, tri (2, 3-dichloropropyl) phosphate, tri (2, 3-dibromopropyl) phosphate, dicyclopentadiene chlordane anhydride, aliphatic halogenated hydrocarbon, dibromomethane, trichlorobromomethane, dichlorobromomethane and octabromodiphenyl oxide, pentabromoethylbenzene, tetrabromobisphenol A and other aromatic bromides.
The stabilizer is one or a mixture of more of lead salt, metal soap, organic tin, organic antimony, organic rare earth and pure organic compounds.
Heating vinyl acetate with butene-3-nitrile and concentrated hydrochloric acid together, reacting to obtain ammonium chloride precipitate, raising temperature rapidly, refluxing for 15min, adding water, separating upper acid layer, distilling under reduced pressure, and collecting 70-72 deg.C (1.2 kPa) fraction, wherein the defoaming agent is polydimethylsiloxane.
Example 1, a material for preparing a transparent PEVA film, including 35 parts of PE polyethylene, 45 parts of EVA ethylene-vinyl acetate copolymer, 20 parts of low density polyethylene, 10 parts of vinyl acetate, 5 parts of thiol group, 5 parts of a special antifungal/antibacterial agent, 8 parts of graphene powder, 3 parts of a flame retardant, 2 parts of a stabilizer, and 3 parts of a defoaming agent, is prepared.
Putting 35 parts of PE polyethylene, 45 parts of EVA ethylene-vinyl acetate copolymer, 20 parts of low-density polyethylene, 10 parts of vinyl acetate and 5 parts of thiol-containing group into a melting device, heating to the temperature of 280-180 ℃ for melting, melting the materials, maintaining the PEVA film production raw materials in a molten state for 10-15min, sequentially adding a flame retardant and a stabilizer into the PEVA film raw materials in the molten state, adding a defoaming agent into the PEVA film raw materials when the temperature of the PEVA film raw materials is reduced to the temperature of 160-180 ℃, uniformly stirring and fusing the defoaming agent and the PEVA film raw materials by using a stirring paddle, standing for 20-25min, injecting the PEVA film raw materials into a film forming die, and preparing the PEVA film by a cast film forming process.
Example 2, a material for preparing a transparent PEVA film, PE polyethylene 36 parts, EVA ethylene-vinyl acetate copolymer 46 parts, low density polyethylene 21 parts, vinyl acetate 11 parts, thiol group 6 parts, a special antifungal and antibacterial agent 6 parts, graphene powder 9 parts, a flame retardant 4 parts, a stabilizer 3 parts, and a defoaming agent 4 parts, are prepared.
Putting 35 parts of PE polyethylene, 45 parts of EVA ethylene-vinyl acetate copolymer, 20 parts of low-density polyethylene, 10 parts of vinyl acetate and 5 parts of thiol-containing group into a melting device, heating to the temperature of 280-180 ℃ for melting, melting the materials, maintaining the PEVA film production raw materials in a molten state for 10-15min, sequentially adding a flame retardant and a stabilizer into the PEVA film raw materials in the molten state, adding a defoaming agent into the PEVA film raw materials when the temperature of the PEVA film raw materials is reduced to the temperature of 160-180 ℃, uniformly stirring and fusing the defoaming agent and the PEVA film raw materials by using a stirring paddle, standing for 20-25min, injecting the PEVA film raw materials into a film forming die, and preparing the PEVA film by a cast film forming process.
Example 3, a transparent PEVA film is prepared from 37 parts of PE polyethylene, 47 parts of EVA ethylene-vinyl acetate copolymer, 22 parts of low density polyethylene, 12 parts of vinyl acetate, 7 parts of thiol-containing groups, 7 parts of a special antifungal/antibacterial agent, 10 parts of graphene powder, 5 parts of a flame retardant, 4 parts of a stabilizer, and 5 parts of a defoaming agent.
Putting 35 parts of PE polyethylene, 45 parts of EVA ethylene-vinyl acetate copolymer, 20 parts of low-density polyethylene, 10 parts of vinyl acetate and 5 parts of thiol-containing group into a melting device, heating to the temperature of 280-180 ℃ for melting, melting the materials, maintaining the PEVA film production raw materials in a molten state for 10-15min, sequentially adding a flame retardant and a stabilizer into the PEVA film raw materials in the molten state, adding a defoaming agent into the PEVA film raw materials when the temperature of the PEVA film raw materials is reduced to the temperature of 160-180 ℃, uniformly stirring and fusing the defoaming agent and the PEVA film raw materials by using a stirring paddle, standing for 20-25min, injecting the PEVA film raw materials into a film forming die, and preparing the PEVA film by a cast film forming process.
Example 4, a transparent PEVA film is prepared by using 40 parts of PE polyethylene, 50 parts of EVA ethylene-vinyl acetate copolymer, 28 parts of low density polyethylene, 15 parts of vinyl acetate, 8 parts of a special antifungal/antibacterial agent, 8 parts of thiol group, 10 parts of graphene powder, 6 parts of a flame retardant, 5 parts of a stabilizer, and 5 parts of a defoaming agent.
Putting 35 parts of PE polyethylene, 45 parts of EVA ethylene-vinyl acetate copolymer, 20 parts of low-density polyethylene, 10 parts of vinyl acetate and 5 parts of thiol-containing group into a melting device, heating to the temperature of 280-180 ℃ for melting, melting the materials, maintaining the PEVA film production raw materials in a molten state for 10-15min, sequentially adding a flame retardant and a stabilizer into the PEVA film raw materials in the molten state, adding a defoaming agent into the PEVA film raw materials when the temperature of the PEVA film raw materials is reduced to the temperature of 160-180 ℃, uniformly stirring and fusing the defoaming agent and the PEVA film raw materials by using a stirring paddle, standing for 20-25min, injecting the PEVA film raw materials into a film forming die, and preparing the PEVA film by a cast film forming process.
The mildew-proof antibacterial transparent PEVA film contains vinyl acetate, the PEVA film improves the transparency, softness and toughness of the PEVA film by increasing the content of the vinyl acetate of the PEVA film, the PEVA raw material needs to be heated and melted firstly when the PEVA film is processed and formed, and the defoaming agent and the stabilizing agent are added into the raw material.
A mildew-proof antibacterial transparent PEVA film and a preparation process thereof comprise the following steps:
A. firstly, preparing PE polyethylene, EVA ethylene-vinyl acetate copolymer, low-density polyethylene and vinyl acetate according to a certain proportion, putting the mixture into a melting device, heating for melting, and maintaining the PEVA film production raw material in a molten state for 10-15min after the material is melted;
B. sequentially adding a flame retardant and a stabilizer into a PEVA film raw material in a molten state;
C. when the temperature of the PEVA film raw material is reduced to 180 ℃ of 160-;
D. injecting the PEVA film raw material into a film forming die, and preparing the PEVA film through a casting film forming process.
Compared with the prior art, the invention has the beneficial effects that:
the PEVA film prepared by the invention has good transparency, softness and toughness, and the application range of the PEVA film is increased.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A mildew-proof antibacterial transparent PEVA film and a preparation process thereof are characterized in that: the flame retardant is characterized by comprising 35-50 parts of PE polyethylene, 45-55 parts of EVA ethylene-vinyl acetate copolymer, 20-30 parts of low-density polyethylene, 10-16 parts of vinyl acetate, 5-10 parts of a special mildew-proof antibacterial agent, 5-8 parts of thiol-containing group, 8-10 parts of graphene powder, 3-6 parts of a flame retardant, 2-6 parts of a stabilizer and 3-5 parts of a defoaming agent.
2. The mildew-proof and antibacterial transparent PEVA film and the preparation process thereof as claimed in claim 1, wherein: 36 parts of PE polyethylene, 45 parts of EVA ethylene-vinyl acetate copolymer, 20 parts of low-density polyethylene, 11 parts of vinyl acetate, 6 parts of a special mildew-proof antibacterial agent, 6 parts of a thiol-containing group, 8 parts of graphene powder, 3 parts of a flame retardant, 3 parts of a stabilizer and 4 parts of a defoaming agent.
3. The mildew-proof and antibacterial transparent PEVA film and the preparation process thereof as claimed in claim 1, wherein: the special mildewproof antibacterial agent contains an inorganic antibacterial agent, a metal ion antibacterial agent, a phenol antibacterial agent or polyvinyl pyridine.
4. The mildew-proof and antibacterial transparent PEVA film and the preparation process thereof as claimed in claim 1, wherein: the flame retardant is tributyl phosphate, tri (2-ethylhexyl) phosphate, tri (2-chloroethyl) phosphate, tri (2, 3-dichloropropyl) phosphate and tri (2, 3-dibromopropyl) phosphate of alkyl phosphate;
or dicyclopentadiene chlordanic anhydride, aliphatic halogenated hydrocarbon, dibromomethane, trichlorobromomethane, dichlorobromomethane, octabromodiphenyl oxide, pentabromoethylbenzene, tetrabromobisphenol A and other aromatic bromides.
5. The mildewproof and antibacterial transparent PEVA film and the preparation process thereof as claimed in claim 1 or 2, wherein: the stabilizer is one or a mixture of more of lead salt, metal soap, organic tin, organic antimony, organic rare earth and pure organic compounds.
6. The mildew-proof and antibacterial transparent PEVA film and the preparation process thereof as claimed in claim 1, wherein: the defoaming agent adopts polydimethylsiloxane.
7. The mildew-proof antibacterial transparent PEVA film and the preparation process thereof for realizing the mildew-proof antibacterial transparent PEVA film as claimed in claim 1 comprise the following steps:
A. firstly, preparing PE polyethylene, EVA ethylene-vinyl acetate copolymer, low-density polyethylene and vinyl acetate according to a certain proportion, putting the mixture into a melting device, heating for melting, and maintaining the PEVA film production raw material in a molten state for 10-15min after the material is melted;
B. sequentially adding a flame retardant and a stabilizer into a PEVA film raw material in a molten state;
C. when the temperature of the PEVA film raw material is reduced to 180 ℃ of 160-;
D. injecting the PEVA film raw material into a film forming die, and preparing the PEVA film through a casting film forming process.
8. The mildew-proof and antibacterial transparent PEVA film and the preparation process thereof as claimed in claim 1, wherein: the heating melting temperature of the PE polyethylene, the EVA ethylene-vinyl acetate copolymer and the low-density polyethylene is 280-300 ℃, and the proportion of the PE polyethylene, the EVA ethylene-vinyl acetate copolymer and the low-density polyethylene is 5:6: 3.
9. The mildew-proof and antibacterial transparent PEVA film and the preparation process thereof as claimed in claim 1, wherein: heating the vinyl acetate with butene-3-nitrile and concentrated hydrochloric acid together, reacting to generate a large amount of ammonium chloride precipitate, quickly raising the temperature, refluxing for 15min, adding water, separating an upper acid layer, distilling under reduced pressure, and collecting a fraction of 70-72 ℃ (1.2 kPa).
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| CN201911028188.XA CN110643107A (en) | 2019-10-28 | 2019-10-28 | Mildew-proof antibacterial transparent PEVA film and preparation process thereof |
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| CN201911028188.XA CN110643107A (en) | 2019-10-28 | 2019-10-28 | Mildew-proof antibacterial transparent PEVA film and preparation process thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112831112A (en) * | 2021-01-07 | 2021-05-25 | 浙江万里新材料科技有限公司 | Cross-linked polyethylene foam material and preparation method thereof |
| CN114250038A (en) * | 2021-12-31 | 2022-03-29 | 东莞亿帆材料科技有限公司 | Printable environment-friendly film and preparation method thereof |
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| US20070287803A1 (en) * | 2006-06-08 | 2007-12-13 | Urian David C | Shaped articles containing poly(vinylpyrrolidone)-iodine complex |
| CN105885203A (en) * | 2016-06-20 | 2016-08-24 | 东莞市开源塑化科技有限公司 | Mildew-proof antibacterial EVA (ethylene-vinyl acetate) or PEVA (polyethylene vinyl acetate) film |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112831112A (en) * | 2021-01-07 | 2021-05-25 | 浙江万里新材料科技有限公司 | Cross-linked polyethylene foam material and preparation method thereof |
| CN114250038A (en) * | 2021-12-31 | 2022-03-29 | 东莞亿帆材料科技有限公司 | Printable environment-friendly film and preparation method thereof |
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Application publication date: 20200103 |