CN113201196A - PVA film and production process thereof - Google Patents
PVA film and production process thereof Download PDFInfo
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- CN113201196A CN113201196A CN202110509134.6A CN202110509134A CN113201196A CN 113201196 A CN113201196 A CN 113201196A CN 202110509134 A CN202110509134 A CN 202110509134A CN 113201196 A CN113201196 A CN 113201196A
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/275—Recovery or reuse of energy or materials
- B29C48/277—Recovery or reuse of energy or materials of materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/793—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling upstream of the plasticising zone, e.g. heating in the hopper
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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
- 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
- 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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- 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
- C08K3/34—Silicon-containing compounds
- C08K3/346—Clay
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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
- C08K5/04—Oxygen-containing compounds
- C08K5/05—Alcohols; Metal alcoholates
- C08K5/053—Polyhydroxylic alcohols
-
- 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
- C08K5/04—Oxygen-containing compounds
- C08K5/06—Ethers; Acetals; Ketals; Ortho-esters
-
- 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
- C08K5/16—Nitrogen-containing compounds
- C08K5/17—Amines; Quaternary ammonium compounds
-
- 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
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3412—Heterocyclic compounds having nitrogen in the ring having one nitrogen atom in the ring
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The invention discloses a PVA film and a production process thereof, wherein the production process specifically comprises the following steps: the preparation method comprises the following steps of (1) weighing and proportioning 92 parts, 0.5 part, 0.3 part, 0.6 part, 0.3 part and 2 parts of polyvinyl alcohol resin, plasticizer, activator, heat stabilizer, antioxidant and filler, and putting 92 parts of polyvinyl alcohol resin, 0.5 part of plasticizer, 0.3 part of activator, 0.6 part of heat stabilizer, 0.3 part of antioxidant and 2 parts of filler into a high-speed stirrer for stirring and mixing to obtain a mixed master batch; according to the PVA film and the production process thereof, in the extrusion process, the heating sleeve heats the mixed master batch in the conveying pipe, so that the mixed master batch is in a molten state, the mixed master batch can be conveniently conveyed in the conveying pipe, the mixed master batch is effectively prevented from being blocked in the conveying process, leftover materials of the PVA film can be recycled, and the utilization rate of the PVA film in the production process is improved.
Description
Technical Field
The invention relates to the field of PVA films, in particular to a PVA film and a production process thereof.
Background
The polyvinyl alcohol film is PVA for short, the density of the polyvinyl alcohol film is 1.26-1, the cubic power of 29g/cm, the refractive index is 1.52, the polyvinyl alcohol film emits white light after being irradiated by ultraviolet rays, the water absorption is high, the polyvinyl alcohol film can be dissolved after being immersed in water, the water content of the fiber can reach 30% -50%, and the moisture content of the fiber under the environment of 65% RH and 25 ℃ can also reach 4.5%. Can permeate water vapor, but hardly permeate alcohol vapor, can not permeate organic solvent steam, inert gas and hydrogen, and the barrier property of the polyvinyl alcohol film is even better than that of a vinylidene chloride film.
But there is certain weak point to be improved in current PVA film preparation process, at first, in the in-process of extruding, does not heat the mixed masterbatch of conveyer pipe inside, and inconvenient mixed masterbatch carries in the inside of conveyer pipe, and the jam appears in the in-process of carrying in the mixed masterbatch easily, and secondly, the in-process of making membrane does not carry out the clout and retrieves, does not carry out recycle to the leftover bits of PVA film, and the utilization ratio of PVA film production process is not high.
Disclosure of Invention
The invention aims to provide a PVA film and a production process thereof, and solves the technical problems that the mixed master batch in a conveying pipe is not heated in the extrusion process of the conventional PVA film, the mixed master batch is inconvenient to convey in the conveying pipe, the mixed master batch is easy to block in the conveying process, no excess material is recovered in the film making process, no leftover material of the PVA film is recycled, and the utilization rate of the PVA film in the production process is low.
The purpose of the invention can be realized by the following technical scheme:
a PVA film is composed of the following raw materials in parts by weight: 90-95 parts of polyvinyl alcohol resin, 0.2-2 parts of plasticizer, 0.1-0.5 part of activator, 0.4-0.8 part of heat stabilizer, 0.2-0.7 part of antioxidant and 1-3 parts of filler.
Preferably, the PVA film comprises the following components in parts by weight: 92 parts of polyvinyl alcohol resin, 0.5 part of plasticizer, 0.3 part of active agent, 0.6 part of heat stabilizer, 0.3 part of antioxidant and 2 parts of filler.
Preferably, the plasticizer is one or more of glycerol, propylene glycol, ethylene glycol, butanediol, diethylene glycol, triethylene glycol, triethanolamine and lactam, and the filler is one or more of talcum powder, mica, clay, wollastonite and calcium carbonate.
A production process of a PVA film specifically comprises the following steps:
the method comprises the following steps: proportioning, namely metering 92 parts, 0.5 part, 0.3 part, 0.6 part, 0.3 part and 2 parts of polyvinyl alcohol resin, plasticizer, activator, heat stabilizer, antioxidant and filler;
step two: mixing, namely putting 92 parts of polyvinyl alcohol resin, 0.5 part of plasticizer, 0.3 part of active agent, 0.6 part of heat stabilizer, 0.3 part of antioxidant and 2 parts of filler into a high-speed mixer, and stirring and mixing to obtain a mixed master batch;
step three: extruding, namely conveying the mixed master batch obtained in the step two to a double-screw extruder through a conveying pipe by a feeder to perform melt extrusion granulation, and simultaneously heating the mixed master batch in the conveying pipe to obtain polyvinyl alcohol resin granules;
step four: drying, namely putting the polyvinyl alcohol resin granules obtained in the step three into a vacuum dryer for drying treatment;
step five: and (2) preparing a film, namely introducing fully dried polyvinyl alcohol resin granules into an extruder, carrying out hot melting extrusion on a hot melting mixture through a forming die under the action of pressure, carrying out roll-in sizing on a solution extruded through a casting die through a roll shaft, finally drawing a PVA film through a film making machine according to a certain film drawing speed, and recovering the cut leftover materials after sizing through a surplus material recovery mechanism.
Further, in the second step, the rotating speed of the rotating shaft of the high-speed stirrer is 220-.
Further, in the third step, a heating sleeve is sleeved on the outer surface of the conveying pipe, and a heat conducting pad is arranged between the heating sleeve and the conveying pipe.
Further, in the third step, the temperature of the feeding section of the double-screw extruder is set to be 60 ℃, the temperature of the feeding section of the double-screw extruder is set to be 100 ℃, and the temperature of the outlet flange of the double-screw extruder is set to be 120 ℃.
Further, in the third step, the temperature of each zone of the double-screw extruder is 200-300 ℃.
Further, in the fourth step, the vacuum dryer is divided into a primary drying area and a secondary drying area, the working temperature of the primary drying area is 110-130 ℃, and the drying temperature of the secondary drying area is 130-150 ℃.
Further, in the fifth step, the excess material recycling mechanism comprises a recycling pipe and a processing tank, and a processing chamber is formed in the processing tank.
The invention has the beneficial effects that:
in the extrusion process, the heating sleeve heats the mixed master batch in the conveying pipe, so that the mixed master batch is in a molten state, the mixed master batch can be conveniently conveyed in the conveying pipe, and the mixed master batch is effectively prevented from being blocked in the conveying process;
through carrying out the clout at the in-process of making membrane and retrieving, can carry out recycle to the leftover bits of PVA film, improved the utilization ratio of PVA film production process.
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.
A PVA film is composed of the following raw materials in parts by weight: 90-95 parts of polyvinyl alcohol resin, 0.2-2 parts of plasticizer, 0.1-0.5 part of activator, 0.4-0.8 part of heat stabilizer, 0.2-0.7 part of antioxidant and 1-3 parts of filler.
The PVA film comprises the following components in parts by weight: 92 parts of polyvinyl alcohol resin, 0.5 part of plasticizer, 0.3 part of active agent, 0.6 part of heat stabilizer, 0.3 part of antioxidant and 2 parts of filler.
The plasticizer is one or more of glycerol, propylene glycol, ethylene glycol, butanediol, diethylene glycol, triethylene glycol, triethanolamine and lactam, and the filler is one or more of talcum powder, mica, clay, wollastonite and calcium carbonate
A production process of a PVA film specifically comprises the following steps:
the method comprises the following steps: proportioning, namely metering 92 parts, 0.5 part, 0.3 part, 0.6 part, 0.3 part and 2 parts of polyvinyl alcohol resin, plasticizer, activator, heat stabilizer, antioxidant and filler;
step two: mixing, namely putting 92 parts of polyvinyl alcohol resin, 0.5 part of plasticizer, 0.3 part of active agent, 0.6 part of heat stabilizer, 0.3 part of antioxidant and 2 parts of filler into a high-speed mixer, and stirring and mixing to obtain a mixed master batch;
step three: extruding, namely conveying the mixed master batch obtained in the step two to a double-screw extruder through a conveying pipe by a feeder to perform melt extrusion granulation, and simultaneously heating the mixed master batch in the conveying pipe to obtain polyvinyl alcohol resin granules;
step four: drying, namely putting the polyvinyl alcohol resin granules obtained in the step three into a vacuum dryer for drying treatment;
step five: and (2) preparing a film, namely introducing fully dried polyvinyl alcohol resin granules into an extruder, carrying out hot melting extrusion on a hot melting mixture through a forming die under the action of pressure, carrying out roll-in sizing on a solution extruded through a casting die through a roll shaft, finally drawing a PVA film through a film making machine according to a certain film drawing speed, and recovering the cut leftover materials after sizing through a surplus material recovery mechanism.
In the second step, the rotating speed of the rotating shaft of the high-speed stirrer is 220-300r/min, and the mixing time is 10-40 min.
In the third step, the outer surface of the conveying pipe is sleeved with a heating sleeve, and a heat conducting pad is arranged between the heating sleeve and the conveying pipe.
In the third step, the temperature of the feeding section of the double-screw extruder is set to be 60 ℃, the temperature of the feeding section of the double-screw extruder is set to be 100 ℃, and the temperature of the outlet flange of the double-screw extruder is set to be 120 ℃.
In the fourth step, the vacuum drier is divided into a primary drying area and a secondary drying area, the working temperature of the primary drying area is 110-130 ℃, and the drying temperature of the secondary drying area is 130-150 ℃.
And in the fifth step, the excess material recovery mechanism comprises a recovery pipe and a treatment tank, and a treatment chamber is arranged in the treatment tank.
The foregoing is merely exemplary and illustrative of the principles of the present invention and various modifications, additions and substitutions of the specific embodiments described herein may be made by those skilled in the art without departing from the principles of the present invention or exceeding the scope of the claims set forth herein.
Claims (9)
1. A PVA film characterized in that: the PVA film is composed of the following raw materials in parts by weight: 90-95 parts of polyvinyl alcohol resin, 0.2-2 parts of plasticizer, 0.1-0.5 part of activator, 0.4-0.8 part of heat stabilizer, 0.2-0.7 part of antioxidant and 1-3 parts of filler.
2. The PVA film according to claim 1, wherein the PVA film comprises the following components in parts by weight: 92 parts of polyvinyl alcohol resin, 0.5 part of plasticizer, 0.3 part of active agent, 0.6 part of heat stabilizer, 0.3 part of antioxidant and 2 parts of filler.
3. The PVA film according to claim 1, wherein the plasticizer is one or more selected from the group consisting of glycerin, propylene glycol, ethylene glycol, butylene glycol, diethylene glycol, triethylene glycol, triethanolamine and lactam, and the filler is one or more selected from the group consisting of talc, mica, clay, wollastonite and calcium carbonate.
4. The production process of the PVA film is characterized by comprising the following steps:
the method comprises the following steps: proportioning, namely metering 92 parts, 0.5 part, 0.3 part, 0.6 part, 0.3 part and 2 parts of polyvinyl alcohol resin, plasticizer, activator, heat stabilizer, antioxidant and filler;
step two: mixing, namely putting 92 parts of polyvinyl alcohol resin, 0.5 part of plasticizer, 0.3 part of active agent, 0.6 part of heat stabilizer, 0.3 part of antioxidant and 2 parts of filler into a high-speed mixer, and stirring and mixing to obtain a mixed master batch;
step three: extruding, namely conveying the mixed master batch obtained in the step two to a double-screw extruder through a conveying pipe by a feeder to perform melt extrusion granulation, and simultaneously heating the mixed master batch in the conveying pipe to obtain polyvinyl alcohol resin granules;
step four: drying, namely putting the polyvinyl alcohol resin granules obtained in the step three into a vacuum dryer for drying treatment;
step five: and (2) preparing a film, namely introducing fully dried polyvinyl alcohol resin granules into an extruder, carrying out hot melting extrusion on a hot melting mixture through a forming die under the action of pressure, carrying out roll-in sizing on a solution extruded through a casting die through a roll shaft, finally drawing a PVA film through a film making machine according to a certain film drawing speed, and recovering the cut leftover materials after sizing through a surplus material recovery mechanism.
5. A process for the production of a PVA film according to claim 4, wherein: in the second step, the rotating speed of the rotating shaft of the high-speed stirrer is 220-300r/min, and the mixing time is 10-40 min.
6. A process for the production of a PVA film according to claim 4, wherein: in the third step, the outer surface of the conveying pipe is sleeved with a heating sleeve, and a heat conducting pad is arranged between the heating sleeve and the conveying pipe.
7. A process for the production of a PVA film according to claim 4, wherein: in the third step, the temperature of the feeding section of the double-screw extruder is set to be 60 ℃, the temperature of the feeding section of the double-screw extruder is set to be 100 ℃, and the temperature of the outlet flange of the double-screw extruder is set to be 120 ℃.
8. A process for the production of a PVA film according to claim 4, wherein: in the fourth step, the vacuum drier is divided into a primary drying area and a secondary drying area, the working temperature of the primary drying area is 110-130 ℃, and the drying temperature of the secondary drying area is 130-150 ℃.
9. A process for the production of a PVA film according to claim 4, wherein: and in the fifth step, the excess material recovery mechanism comprises a recovery pipe and a treatment tank, and a treatment chamber is arranged in the treatment tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110509134.6A CN113201196A (en) | 2021-05-11 | 2021-05-11 | PVA film and production process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110509134.6A CN113201196A (en) | 2021-05-11 | 2021-05-11 | PVA film and production process thereof |
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| CN113201196A true CN113201196A (en) | 2021-08-03 |
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| CN102286183A (en) * | 2011-06-17 | 2011-12-21 | 包头科瑞尔新材料有限公司 | Plastic polyvinyl alcohol (PVA) resin and preparation method thereof |
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| CN112194869A (en) * | 2020-08-17 | 2021-01-08 | 福建师范大学泉港石化研究院 | Special PVA material capable of being thermoplastically processed and preparation method thereof |
| CN112406069A (en) * | 2020-11-09 | 2021-02-26 | 时向东 | Plastic extruder capable of stably mixing materials and controlling temperature |
| CN112721096A (en) * | 2020-11-27 | 2021-04-30 | 南京肯特复合材料股份有限公司 | Extruder head and polytetrafluoroethylene extruder |
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Application publication date: 20210803 |