CN113087941A - Water-soluble polyvinyl alcohol film and preparation method thereof - Google Patents
Water-soluble polyvinyl alcohol film and preparation method thereof Download PDFInfo
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- CN113087941A CN113087941A CN202110345660.3A CN202110345660A CN113087941A CN 113087941 A CN113087941 A CN 113087941A CN 202110345660 A CN202110345660 A CN 202110345660A CN 113087941 A CN113087941 A CN 113087941A
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- 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
- C08J2329/00—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 an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
- C08J2329/02—Homopolymers or copolymers of unsaturated alcohols
- C08J2329/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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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
- C08J2429/00—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 an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
- C08J2429/02—Homopolymers or copolymers of unsaturated alcohols
- C08J2429/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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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
- C08J2471/00—Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain; Derivatives of such polymers
- C08J2471/02—Polyalkylene oxides
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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
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/02—Organic and inorganic ingredients
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/20—Carboxylic acid amides
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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
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/524—Esters of phosphorous acids, e.g. of H3PO3
- C08K5/526—Esters of phosphorous acids, e.g. of H3PO3 with hydroxyaryl compounds
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Abstract
The invention discloses a water-soluble adjustable polyvinyl alcohol film, which comprises the following components in parts by weight: 100 parts of polyvinyl alcohol powder, 20-40 parts of compound plasticizer, 1-5 parts of processing lubricant, 0.1-1 part of antioxidant, 0.1-1 part of opening agent and 0.5-2 parts of slipping agent. The invention also discloses a preparation method of the water-soluble adjustable polyvinyl alcohol film, which comprises the steps of weighing the raw material components according to a formula, putting the raw material components into a high-speed mixer, uniformly mixing the raw material components, discharging the mixture, and then sequentially carrying out extrusion granulation by a double-screw extruder and blow molding by a film blowing machine to obtain the water-soluble adjustable polyvinyl alcohol film. The water solubility of the polyvinyl alcohol film prepared by the invention can be regulated and controlled according to raw material components, and the polyvinyl alcohol film has excellent mechanical properties and can be used for shopping bags with different water solubilities.
Description
Technical Field
The invention relates to a polyvinyl alcohol film and a preparation method thereof, in particular to a water-soluble polyvinyl alcohol film and a preparation method thereof.
Background
With the increasing awareness of people's living standards and environmental protection, white pollution caused by plastic packaging materials is more and more important, so that the requirements for green packaging materials in the field of packaging are higher and higher, and the water-soluble polyvinyl alcohol packaging film is used as a novel degradable green packaging material, is safe and convenient to use, has good water solubility and biodegradability, and is widely used for packaging various products in developed countries such as Europe, America, Japan and the like, such as pesticides, detergents, water treatment agents and the like. However, the existing water-soluble film has the problems of bubble generation, uneven thickness and the like in the production, poor tensile strength, poor solubility, long hydrolysis time and partial pollution, and the problems are directly applied to the water-soluble polyvinyl alcohol film. At present, the water-soluble polyvinyl alcohol film is mainly formed by solution tape casting, the forming process and the formula are simple and easy to operate, but the development of the process is always limited by the defects of long production period, low production efficiency, high energy consumption and the like. With the development of PVA modification technology, the process for preparing the water-soluble polyvinyl alcohol film by blow molding is carried out at the same time, and the advantage in the aspect of cost control is quite obvious. However, the blow molding technology of water-soluble polyvinyl alcohol film is not mature at present, continuous production is difficult to realize, traditional film blowing equipment needs to be upgraded and modified, and the film produced by blow molding and the film produced by solution casting technology have great difference, for example, the water solubility is much worse than that of the film produced by solution casting technology, so that the film cannot completely replace the film produced by the solution casting technology.
Disclosure of Invention
The invention aims to overcome the defects of the existing blow molding water-soluble polyvinyl alcohol film, replace the water-soluble polyvinyl alcohol film formed by solution and provide the polyvinyl alcohol film with adjustable water solubility.
The invention solves the technical problem and provides a preparation method of the polyvinyl alcohol film.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a water-soluble adjustable polyvinyl alcohol film comprises the following components in parts by weight: 100 parts of polyvinyl alcohol powder, 20-40 parts of compound plasticizer, 1-5 parts of processing lubricant, 0.1-1 part of antioxidant, 0.1-1 part of opening agent and 0.5-2 parts of slipping agent.
Wherein, the polyvinyl alcohol powder is a composition of partial alcoholysis type polyvinyl alcohol with different polymerization degrees.
Wherein the compound plasticizer is a compound of glycerol, polyethylene glycol with molecular weight less than 600 or low molecular weight polypropylene glycol, and an amide reagent.
Wherein, the processing lubricant is at least one of polyethylene glycol and polyethylene wax with molecular weight more than 1000.
Wherein the antioxidant is a composition of hindered phenol antioxidant and phosphite ester antioxidant containing benzene ring.
Wherein the opening agent is at least one of stearamide, oleamide and erucamide.
Wherein the slipping agent is at least one of talcum powder, white carbon black and titanium dioxide.
The preparation method of the water-soluble adjustable polyvinyl alcohol film comprises the following steps:
(1) 100 parts of partial alcoholysis type polyvinyl alcohol powder with different polymerization degrees are placed in a high-speed mixer, 1-5 parts of processing lubricant, 0.1-1 part of antioxidant, 0.1-1 part of opening agent and 0.1-1 part of slipping agent are sequentially added into a high-speed mixer, the mixture is mixed for 1-5 minutes at a high speed, the temperature is raised to 80 ℃, 20-40 parts of compound plasticizer are slowly added into the high-speed mixer, and the mixture is continuously mixed for 10-30 minutes and uniformly mixed after the addition is finished.
(2) And (2) conveying the mixed material obtained in the step (1) to a double-screw extruder, and extruding and granulating to obtain the modified polyvinyl alcohol material capable of being subjected to blow molding.
(3) Adding the modified polyvinyl alcohol material obtained in the step (2) into a film blowing machine, and performing blow molding to obtain the water-soluble polyvinyl alcohol film.
The extrusion granulation temperature in the step (2) is 80 ℃/120 ℃/150 ℃/160 ℃/170 ℃/175 ℃/175 ℃/170 ℃/170 ℃/165 ℃.
In the step (3), the film blowing temperature is 170 ℃/175 ℃/175 ℃/175 ℃/170 ℃.
The invention further aims to solve the technical problem of providing a polyvinyl alcohol film with adjustable water solubility, which can meet the packaging requirements of different water-soluble products and the requirements of different application fields.
Compared with the prior art, the invention has the following beneficial technical effects:
1. the water solubility of the polyvinyl alcohol film with adjustable water solubility can be adjusted according to a formula and a process, and the polyvinyl alcohol film with adjustable water solubility is more excellent and can be comparable to a polyvinyl alcohol film formed by solution tape casting.
2. The polyvinyl alcohol film prepared by the invention has high production efficiency and low raw material cost, and has obvious price advantage compared with the prior solution tape-casting film and other completely biodegradable films.
3. All the components adopted by the invention are nontoxic and harmless, have good biocompatibility and degradability, and meet the requirement of environmental protection.
Drawings
FIG. 1 is a picture of the process of dissolving the water-soluble adjustable polyvinyl alcohol film prepared by the present invention in water.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
178890 parts of polyvinyl alcohol, 058810 parts of polyvinyl alcohol, 0.5 part of antioxidant 1098/antioxidant 168 (the mass ratio is 3: 2) of polyethylene glycol 40005 parts, 0.5 part of erucamide and 1 part of talc powder with 5000 meshes are added into a high-speed mixer to be stirred for 5 minutes, the mixture is uniformly mixed, the temperature is increased to 80 ℃, 35 parts of compound plasticizer is slowly added into the high-speed mixer, the mixture is continuously mixed for 20 minutes at high speed after the addition is finished, the mixture is taken out for packaging, is placed for curing for a period of time and then is extruded and granulated by a double-screw extruder under the condition of controlling the temperature to be 80-175 ℃, and then the water-soluble adjustable polyvinyl alcohol film is obtained by.
Example 2
178880 parts of polyvinyl alcohol, 058820 parts of polyvinyl alcohol, 0.5 part of antioxidant 1098/antioxidant 168 (the mass ratio is 3: 2) of polyethylene glycol 40005 parts, 0.5 part of erucamide and 1 part of talc powder with 5000 meshes are added into a high-speed mixer to be stirred for 5 minutes, the mixture is uniformly mixed, the temperature is increased to 80 ℃, 35 parts of compound plasticizer is slowly added into the high-speed mixer, the mixture is continuously mixed for 20 minutes at high speed after the addition is finished, the mixture is taken out for packaging, is placed for curing for a period of time and then is extruded and granulated by a double-screw extruder under the condition of controlling the temperature to be 80-175 ℃, and then the water-soluble adjustable polyvinyl alcohol film is obtained by.
Example 3
178870 parts of polyvinyl alcohol, 058830 parts of polyvinyl alcohol, 0.5 part of antioxidant 1098/antioxidant 168 (the mass ratio is 3: 2) of polyethylene glycol 40005 parts, 0.5 part of erucamide and 1 part of talc powder with 5000 meshes are added into a high-speed mixer to be stirred for 5 minutes, the mixture is uniformly mixed, the temperature is increased to 80 ℃, 35 parts of compound plasticizer is slowly added into the high-speed mixer, the mixture is continuously mixed for 20 minutes at high speed after the addition is finished, the mixture is taken out for packaging, is placed for curing for a period of time and then is extruded and granulated by a double-screw extruder under the condition of controlling the temperature to be 80-175 ℃, and then the water-soluble adjustable polyvinyl alcohol film is obtained by.
Example 4
Adding 178860 parts of polyvinyl alcohol, 058840 parts of polyvinyl alcohol, 0.5 part of antioxidant 1098/antioxidant 168 (mass ratio is 3: 2) of polyethylene glycol 40005 parts of antioxidant, 0.5 part of erucamide and 1 part of talc powder with 5000 meshes into a high-speed mixer, stirring for 5 minutes, uniformly mixing, heating to 80 ℃, slowly adding 35 parts of compound plasticizer into the high-speed mixer, continuously mixing at high speed for 20 minutes after the addition is finished, taking out and packaging, standing for curing for a period of time, then extruding and granulating by using a double-screw extruder under the condition of controlling the temperature of 80-175 ℃, and then performing blow molding by using a film blowing machine to obtain the water-soluble adjustable polyvinyl alcohol film.
Example 5
178850 parts of polyvinyl alcohol, 058850 parts of polyvinyl alcohol, 0.5 part of antioxidant 1098/antioxidant 168 (the mass ratio is 3: 2) of polyethylene glycol 40005 parts, 0.5 part of erucamide and 1 part of talc powder with 5000 meshes are added into a high-speed mixer to be stirred for 5 minutes, the mixture is uniformly mixed, the temperature is increased to 80 ℃, 35 parts of compound plasticizer is slowly added into the high-speed mixer, the mixture is continuously mixed for 20 minutes at high speed after the addition is finished, the mixture is taken out for packaging, is placed for curing for a period of time and then is extruded and granulated by a double-screw extruder under the condition of controlling the temperature to be 80-175 ℃, and then the water-soluble adjustable polyvinyl alcohol film is obtained by.
Comparative examples
1788100 parts of polyvinyl alcohol, 058810 parts of polyvinyl alcohol, 0.5 part of antioxidant 1098/antioxidant 168 (the mass ratio is 3: 2) of polyethylene glycol 40005 parts, 0.5 part of erucamide and 1 part of talc powder with 5000 meshes are added into a high-speed mixer to be stirred for 5 minutes, the mixture is uniformly mixed, the temperature is increased to 80 ℃, 35 parts of compound plasticizer is slowly added into the high-speed mixer, the mixture is continuously mixed for 20 minutes at high speed after the addition is finished, the mixture is taken out for packaging, is placed for curing for a period of time and then is extruded and granulated by a double-screw extruder under the condition of controlling the temperature to be 80-175 ℃, and then the water-soluble adjustable polyvinyl alcohol film is obtained by.
TABLE 1 mechanical Properties and Water-dissolving time of Water-soluble Adjustable polyvinyl alcohol films
| Sample (I) | Tensile Strength (MPa) | Elongation at Break (%) | Water soluble time(s) |
| Comparative example | 29.06±0.95 | 362±15 | 156±5 |
| Example 1 | 28.39±0.74 | 406±13 | 139±6 |
| Example 2 | 28.97±0.56 | 412±21 | 116±3 |
| Example 3 | 28.57±0.90 | 420±23 | 108±5 |
| Example 4 | 27.38±0.30 | 497±18 | 96±3 |
| Example 5 | 25.77±0.33 | 516±23 | 80±4 |
Claims (10)
1. The water-solubility-controllable polyvinyl alcohol film is characterized by comprising the following components in parts by weight: 100 parts of polyvinyl alcohol powder, 20-40 parts of compound plasticizer, 1-5 parts of processing lubricant, 0.1-1 part of antioxidant, 0.1-1 part of opening agent and 0.5-2 parts of slipping agent.
2. The water soluble regulatable polyvinyl alcohol film of claim 1, wherein said polyvinyl alcohol powder is a composition of partially alcoholyzed polyvinyl alcohols having different degrees of polymerization.
3. The water-soluble controllable polyvinyl alcohol film according to claim 1, wherein the compounded plasticizer is a compound of glycerol, polyethylene glycol with a molecular weight of less than 600 or low molecular weight polypropylene glycol, or an amide reagent.
4. The adjustable water-soluble polyvinyl alcohol film according to claim 1, wherein the processing lubricant is at least one of polyethylene glycol and polyethylene wax having a molecular weight greater than 1000.
5. The water-soluble controllable polyvinyl alcohol film as claimed in claim 1, wherein the antioxidant is a combination of hindered phenol antioxidant and phosphite antioxidant containing benzene ring.
6. The film of claim 1, wherein the opening agent is at least one of stearamide, oleamide, and erucamide.
7. The water-soluble adjustable polyvinyl alcohol film as claimed in claim 1, wherein the slip agent is at least one of talc, white carbon black and titanium dioxide.
8. The method for preparing the water-soluble controllable polyvinyl alcohol film according to claims 1-7, comprising the following steps:
(1) 100 parts of partial alcoholysis type polyvinyl alcohol powder with different polymerization degrees are placed in a high-speed mixer, 1-5 parts of processing lubricant, 0.1-1 part of antioxidant, 0.1-1 part of opening agent and 0.1-1 part of slipping agent are sequentially added into a high-speed mixer, the mixture is mixed for 1-5 minutes at a high speed, the temperature is raised to 80 ℃, 20-40 parts of compound plasticizer are slowly added into the high-speed mixer, and the mixture is continuously mixed for 10-30 minutes and uniformly mixed after the addition is finished.
(2) And (2) conveying the mixed material obtained in the step (1) to a double-screw extruder, and extruding and granulating to obtain the modified polyvinyl alcohol material capable of being subjected to blow molding.
(3) Adding the modified polyvinyl alcohol material obtained in the step (2) into a film blowing machine, and performing blow molding to obtain the water-soluble polyvinyl alcohol film.
9. The method for preparing a water-soluble controllable polyvinyl alcohol film according to claim 8, wherein the extrusion granulation temperature is 80 ℃/120 ℃/150 ℃/160 ℃/170 ℃/175 ℃/175 ℃/170 ℃/170 ℃/165 ℃.
10. The method for preparing a water-soluble controllable polyvinyl alcohol film according to claim 8, wherein the film blowing temperature is 170 ℃/175 ℃/175 ℃/175 ℃/170 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110345660.3A CN113087941A (en) | 2021-03-25 | 2021-03-25 | Water-soluble polyvinyl alcohol film and preparation method thereof |
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| CN202110345660.3A CN113087941A (en) | 2021-03-25 | 2021-03-25 | Water-soluble polyvinyl alcohol film and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114940796A (en) * | 2022-06-27 | 2022-08-26 | 广东冠豪新材料研发有限公司 | Water-soluble packaging film and preparation method thereof |
| CN115895153A (en) * | 2022-11-14 | 2023-04-04 | 广东省科学院生物与医学工程研究所 | Polyvinyl alcohol fruit and vegetable fresh-keeping film and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111269512A (en) * | 2018-12-04 | 2020-06-12 | 广东聚益新材有限公司 | Polyvinyl alcohol film opening agent, polyvinyl alcohol composition, polyvinyl alcohol film master batch and polyvinyl alcohol film |
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2021
- 2021-03-25 CN CN202110345660.3A patent/CN113087941A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111269512A (en) * | 2018-12-04 | 2020-06-12 | 广东聚益新材有限公司 | Polyvinyl alcohol film opening agent, polyvinyl alcohol composition, polyvinyl alcohol film master batch and polyvinyl alcohol film |
Non-Patent Citations (1)
| Title |
|---|
| 郭群等: "《砂浆实验及检测培训教材》", 30 September 2014, 中国建材工业出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114940796A (en) * | 2022-06-27 | 2022-08-26 | 广东冠豪新材料研发有限公司 | Water-soluble packaging film and preparation method thereof |
| CN115895153A (en) * | 2022-11-14 | 2023-04-04 | 广东省科学院生物与医学工程研究所 | Polyvinyl alcohol fruit and vegetable fresh-keeping film and preparation method thereof |
| CN115895153B (en) * | 2022-11-14 | 2024-04-16 | 广东省科学院生物与医学工程研究所 | Polyvinyl alcohol fruit and vegetable fresh-keeping film and preparation method thereof |
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Application publication date: 20210709 |