CN114015281B - Polystyrene plastic sealing film and preparation method thereof - Google Patents
Polystyrene plastic sealing film and preparation method thereof Download PDFInfo
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- CN114015281B CN114015281B CN202111385601.5A CN202111385601A CN114015281B CN 114015281 B CN114015281 B CN 114015281B CN 202111385601 A CN202111385601 A CN 202111385601A CN 114015281 B CN114015281 B CN 114015281B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/106—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C09D11/107—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds from unsaturated acids or derivatives thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/26—Printing on other surfaces than ordinary paper
- B41M1/30—Printing on other surfaces than ordinary paper on organic plastics, horn or similar materials
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
- C09D11/033—Printing inks characterised by features other than the chemical nature of the binder characterised by the solvent
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- Life Sciences & Earth Sciences (AREA)
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- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a polystyrene plastic sealing film and a preparation method thereof, wherein the sealing film comprises a printing layer and a heat sealing layer which are arranged up and down, and the preparation method comprises the following steps: preparing materials according to the following weight ratio, wherein the component A comprises the following components: 30 to 60 parts of polyacrylate, 5 to 30 parts of propyl acetate, 10 to 60 parts of ethyl acetate, 0.1 to 0.5 part of matte powder, 0.1 to 0.5 part of wax powder, 2 to 10 parts of methylcyclohexane, 3 to 8 parts of rosin and 1 to 3 parts of chlorinated polypropylene; the component B comprises: 10-50 parts of polyisocyanate and 20-70 parts of ethyl acetate; uniformly mixing the component A and the component B according to the mass ratio of 15.1 to 15; and (3) adopting the oil obtained in the step (2) as printing ink, printing on the surface of the printing layer by adopting a gravure high-speed printing machine, and curing after printing to obtain the polystyrene plastic sealing film. The method can properly adjust the sealing strength of the sealing film, so that the prepared sealing film has good tearability, low production cost, simple preparation process and good application prospect.
Description
Technical Field
The invention belongs to the technical field of composite films, and particularly relates to a polystyrene plastic sealing film and a preparation method thereof.
Background
Polystyrene (PS) is a colorless transparent thermoplastic plastic, and compared with other plastics, it has the characteristics of high light transmission, surface gloss, easy dyeing, high hardness, good rigidity, and good water resistance and chemical corrosion resistance. Therefore, PS is widely used as a packaging material in the fields of electronic appliances, transparent parts for public buildings, daily necessities, foods, and the like. At present, most sealing films of PS packaging materials are aluminum foils, aluminum-plastic composite materials or aluminum-plated composite materials, and although the barrier property is good, the tearing property is difficult to control, and the cost is high.
Chinese patent CN109291570A discloses a polystyrene plastic cup sealing film for post-fermentation yoghourt and a preparation method thereof, wherein the sealing film comprises a printing layer, a blocking layer and a heat sealing layer which are sequentially arranged from top to bottom, the printing layer is a PET polyester film layer, the blocking layer is an aluminum foil layer, and the heat sealing layer comprises the following components in parts by weight: 30 to 35 parts of low-density polyethylene, 25 to 30 parts of linear low-density polyethylene, 15 to 20 parts of ethylene-methacrylic acid copolymer and 15 to 20 parts of ethylene-vinyl acetate copolymer. The sealing film is complex in manufacturing process, comprises an aluminum foil layer and is relatively high in cost.
Polypropylene (PP) is a thermoplastic synthetic resin with excellent performance, is colorless semitransparent thermoplastic light general-purpose plastic, has chemical resistance, heat resistance, electrical insulation, high-strength mechanical properties, good high-wear-resistance processing properties and the like, and is widely developed and applied in various fields of machinery, automobiles, electronic appliances, buildings, textiles, packaging, agriculture, forestry, fishery, food industry and the like. PP is widely applied to the field of packaging materials due to plasticity and is low in cost, but the heat sealing strength of a PP film to PS plastic is low, and the heat sealing of PS cannot be realized.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the polystyrene plastic sealing film and the preparation method thereof.
The technical scheme of the invention is realized as follows:
a preparation method of a polystyrene plastic sealing film comprises the following steps:
(1) Preparing materials: preparing materials according to the following weight ratio, wherein the component A comprises the following components: 30 to 60 parts of polyacrylate, 5 to 30 parts of propyl acetate, 10 to 60 parts of ethyl acetate, 0.1 to 0.5 part of matte powder, 0.1 to 0.5 part of wax powder, 2 to 10 parts of methylcyclohexane, 3 to 8 parts of rosin and 1 to 3 parts of chlorinated polypropylene; the component B comprises: 10-50 parts of polyisocyanate and 20-70 parts of ethyl acetate;
(2) Mixing materials: uniformly mixing the component A and the component B according to a mass ratio of 15.1-15;
(3) Printing: and (3) adopting the oil material obtained in the step (2) as printing ink, printing on the surface of the printing layer by adopting a gravure high-speed printing machine, and curing after printing to obtain the polystyrene plastic sealing film.
Further, the mass ratio of the component A to the component B in the step (2) is 15.
Further, the printing layer is a polypropylene layer.
Further, the printing conditions in step (3) are: the printing speed is 140 to 200 m/min, the printing plate roller is an electroengraving plate, the plate depth is 20 to 50 mu m, and the curing temperature is 40 to 80 ℃.
Further, in the step (3), curing is carried out for 12 to 24 hours under the temperature condition of 30 to 50 ℃.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention adopts polyacrylate with adhesiveness as a main film forming agent, is bonded with PS at high temperature, and has certain heat seal strength after cooling. The rosin and chlorinated polypropylene resin are used for adjusting the adhesive force between the heat sealing layer and the PS, so that the heat sealing strength is in a proper range, and the sealing film has good tearability.
2. The invention takes a polypropylene (PP) layer as a carrier, and a heat sealing layer with the thickness of 1 to 2 mu m is printed on the PP layer to form the polystyrene plastic sealing film. The PP has a plurality of excellent performances such as chemical resistance, heat resistance, electrical insulation, high-strength mechanical property, good high-wear-resistance processing property and the like, and the PP is adopted as a printing layer of the sealing film, so that the overall performance of the sealing film, such as mechanical strength and barrier property, can be effectively improved. The heat sealing layer adopts polyacrylate as a main film forming agent, and the heat sealing strength of the sealing film is controlled to be 4-9N/15 mm by adjusting the proportion of the film forming auxiliary agent, so that the sealing film is ensured to have certain sealing strength, but has good tearability.
3. PP is common resin, the cost is low, and meanwhile, solvents such as polyacrylate, ethyl acetate and the like and curing agent polyisocyanate are common chemicals, so that the cost is low; the film forming process adopts a gravure high-speed printing mode, has high speed and low cost, thereby reducing the production cost.
Drawings
FIG. 1 is a graph showing the effect of the sealing film obtained in example 1.
Detailed Description
A preparation method of a polystyrene plastic sealing film comprises the following steps:
(1) Preparing materials: preparing materials according to the following weight ratio, wherein the component A comprises the following components: 30 to 60 parts of polyacrylate, 5 to 30 parts of propyl acetate, 10 to 60 parts of ethyl acetate, 0.1 to 0.5 part of matte powder, 0.1 to 0.5 part of wax powder, 2 to 10 parts of methylcyclohexane, 3 to 8 parts of rosin and 1 to 3 parts of chlorinated polypropylene; the component B comprises: 10-50 parts of polyisocyanate and 20-70 parts of ethyl acetate.
(2) Mixing materials: uniformly mixing the component A and the component B according to a mass ratio of 15.1-15; the oil stock is ready for use in 24 hours.
(3) Printing: and (3) adopting the oil obtained in the step (2) as printing ink, printing on the surface of the printing layer by adopting a gravure high-speed printing machine, and curing after printing to obtain the polystyrene plastic sealing film.
In the component A, polyacrylate is used as a main film forming agent, propyl acetate and ethyl acetate are used as solvents for regulating volatilization speed, matte powder is used for regulating viscosity, wax powder is used for improving scratch resistance of the sealing film, methylcyclohexane is used as a solvent, and rosin and chlorinated polypropylene are used for regulating adhesion performance of the sealing film. In the component B, polyisocyanate is used as a curing agent, and ethyl acetate is used as a solvent.
Polyacrylate has adhesiveness, is a heat-sensitive adhesive, can be adhered with PS at high temperature, and can keep certain strength after cooling, thereby sealing the polypropylene plastic.
The boiling point of the ethyl acetate is 77.2 ℃, the boiling point of the propyl acetate is 101.6 ℃, the mixture of the ethyl acetate and the propyl acetate is adopted, so that the volatilization speed can be conveniently adjusted, the proportion of the ethyl acetate is increased to accelerate the volatilization speed, and the proportion of the propyl acetate is increased to reduce the volatilization speed, so that the volatilization speed of the mixture can be adjusted by adjusting and controlling the proportion of the ethyl acetate and the propyl acetate.
The rosin can reduce the temperature of the sealing film for heat sealing on the polystyrene plastic and improve the adhesive force of the sealing film on the polystyrene plastic. The chlorinated polypropylene resin can improve the cohesive strength of the base material, thereby improving the adhesive force of the heat-sealing layer to the printing layer.
In specific implementation, the mass ratio of the component A to the component B is 15.2.
In specific implementation, the printing layer is a polypropylene layer.
The polypropylene layer is used as a carrier of the heat sealing layer, the PP is synthetic resin with excellent performance, and has numerous excellent performances such as chemical resistance, heat resistance, electrical insulation, high-strength mechanical property, good high-wear-resistance processing performance and the like, the PP polypropylene is used as a printing layer to effectively improve the overall performance of the sealing film, and the heat sealing layer with heat sealing strength is arranged on the printing layer, so that the sealing film has heat sealing strength to the PS, the heat sealing strength of the sealing film is 4-9N/15 mm, the sealing film is ensured to be within the range of easy-tear strength, and the sealing film has good easy-tear performance; and the cost of PP is low, so that the cost of the sealing film can be reduced.
In specific implementation, the printing conditions in the step (3) are as follows: the printing speed is 140 to 200 m/min, the printing plate roller is an electric engraving plate, the plate depth is 20 to 50 mu m, and the curing temperature is 40 to 80 ℃.
The uniformity of the heat-sealing layer is controlled through the printing speed, the thickness of the heat-sealing layer is controlled through the control plate depth, so that the heat-sealing strength of the sealing film is controlled, the temperature is favorable for volatilization of a solvent in the sealing film, and the residual amount of the solvent in the sealing film is less than 2PPM and far lower than 5PPM of the national standard.
Specifically, in the step (3), the mixture is cured at a temperature of 30 to 50 ℃ for 12 to 24 hours.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Example 1
(1) Preparing materials: the component A comprises: respectively weighing 30 parts of polyacrylate, 30 parts of propyl acetate, 10 parts of ethyl acetate, 0.4 part of matte powder, 0.2 part of wax powder, 8 parts of methylcyclohexane, 5 parts of rosin and 1 part of chlorinated polypropylene, and then uniformly mixing for later use; and the component B comprises: 10 parts of polyisocyanate and 40 parts of ethyl acetate are respectively weighed and then uniformly mixed for later use.
(2) Mixing: mixing the components A and B according to the weight ratio of 15: and (3) uniformly mixing the components in a mass ratio of 0.2 to obtain the oil material.
(3) Printing: and (3) adopting the oil material obtained in the step (2) as printing ink, printing on PP by adopting a gravure high-speed printing machine at a printing speed of 160 m/min, adopting an electric engraving plate as a printing plate roller at a plate depth of 38 mu m and an oven temperature of 65-70 ℃, and curing for 24 hours in a drying room at 50 ℃ after printing.
Experiments prove that the glossiness (60 ℃) of the sealing film obtained in the embodiment is 90-110; and (3) anti-blocking aspect: under the temperature condition of 50 ℃, the materials are not adhered for 2 hours; and (3) adhesion force: the 98% of the film is not peeled off by adopting a check method; and the smell (solvent residue) is less than or equal to 2PPM.
Example 2
(1) Preparing materials: the component A comprises: respectively weighing 40 parts of polyacrylate, 10 parts of propyl acetate, 45 parts of ethyl acetate, 0.2 part of matte powder, 0.3 part of wax powder, 5 parts of methylcyclohexane, 3 parts of rosin and 2 parts of chlorinated polypropylene, and then uniformly mixing for later use; and B component: respectively weighing 15 parts of polyisocyanate and 50 parts of ethyl acetate, and then uniformly mixing for later use.
(2) Mixing: mixing the components A and B according to the weight ratio of 15: and (3) uniformly mixing the components in a mass ratio of 0.1 to obtain the oil material.
(3) Printing: and (3) adopting the oil material obtained in the step (2) as printing ink, printing on PP by adopting a gravure high-speed printing machine at a printing speed of 160 m/min, adopting an electric engraving plate as a printing plate roller at a plate depth of 45 mu m and an oven temperature of 60-65 ℃, and curing for 24 hours in a drying room at 50 ℃ after printing.
Experiments prove that the glossiness (60 ℃) of the sealing film obtained in the embodiment is 90-110; and (3) anti-blocking aspect: the materials are not adhered for 2 hours at the temperature of 50 ℃; in the aspect of adhesion force: the 98% of the film is not peeled off by adopting a check method; and the smell (solvent residue) is less than or equal to 2PPM.
Example 3
(1) Preparing materials: the component A comprises: respectively weighing 50 parts of polyacrylate, 30 parts of propyl acetate, 40 parts of ethyl acetate, 0.5 part of matte powder, 0.4 part of wax powder, 10 parts of methylcyclohexane, 6 parts of rosin and 3 parts of chlorinated polypropylene, and then uniformly mixing for later use; and B component: 30 parts of polyisocyanate and 65 parts of ethyl acetate are respectively weighed and then uniformly mixed for later use.
(2) Mixing: mixing the components A and B according to the weight ratio of 15: and (3) uniformly mixing the components in a mass ratio of 0.8 to obtain the oil material.
(3) Printing: and (3) adopting the oil material obtained in the step (2) as printing ink, printing on PP by adopting a gravure high-speed printing machine at a printing speed of 160 m/min, adopting an electric engraving plate as a printing plate roller at a plate depth of 50 mu m and an oven temperature of 60-65 ℃, and curing for 24 hours in a 50 ℃ drying room after printing.
Experiments prove that the glossiness (60 ℃) of the sealing film obtained in the embodiment is 90-110; and (3) anti-blocking aspect: under the temperature condition of 50 ℃, the materials are not adhered for 2 hours; and (3) adhesion force: the 98% of the film is not peeled off by adopting a check method; and the smell (solvent residue) is less than or equal to 2PPM.
The sealing film with the heat-seal layer of different thickness carries out the heat-seal to polystyrene plastics under different heat-seal temperature conditions, and heat-seal dwell time is 0.5s, then tests its heat-seal intensity, and its experimental data is shown below:
as can be seen from the above table, the sealing film obtained by the present invention has a heat sealing strength of 4.6 to 8.5N/15 mm and a certain sealing strength when heat-sealed at a temperature of 130 to 165 ℃. Fig. 1 (a) is an effect diagram of the sealing film obtained in example 1 obtained by heat sealing at 145 ℃, which shows that the sealing film can be effectively sealed and has a good sealing effect, and fig. 1 (b) is an effect diagram after tearing, which shows that no sealing film is left along the cup edge and the sealing film is not damaged, and the sealing film obtained by the invention has good tearability and tensile strength.
Finally, it should be noted that the above examples of the present invention are only for illustrating the present invention and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. It is not exhaustive here for all embodiments. All obvious changes and modifications of the present invention are within the scope of the present invention.
Claims (5)
1. A preparation method of a polystyrene plastic sealing film comprises a printing layer and a heat sealing layer which are arranged up and down, and is characterized by comprising the following steps:
(1) Preparing materials: preparing materials according to the following weight ratio, wherein the component A comprises the following components: 30 to 60 parts of polyacrylate, 5 to 30 parts of propyl acetate, 10 to 60 parts of ethyl acetate, 0.1 to 0.5 part of matte powder, 0.1 to 0.5 part of wax powder, 2 to 10 parts of methylcyclohexane, 3 to 8 parts of rosin and 1 to 3 parts of chlorinated polypropylene; the component B comprises: 10-50 parts of polyisocyanate and 20-70 parts of ethyl acetate;
(2) Mixing materials: uniformly mixing the component A and the component B according to a mass ratio of 15.1-15;
(3) Printing: adopting the oil material obtained in the step (2) as printing ink, printing on the surface of a printing layer by adopting a gravure high-speed printing machine, and curing after printing to obtain the polystyrene plastic sealing film; the heat sealing strength of the polystyrene plastic sealing film is 4-9N/15 mm; the printing layer is a polypropylene layer.
2. The method for preparing a polystyrene plastic sealing film as claimed in claim 1, wherein the mass ratio of the component A to the component B in the step (2) is 15.2.
3. The method for preparing a polystyrene plastic sealing film as claimed in claim 1, wherein the printing conditions in step (3) are as follows: the printing speed is 140 to 200 m/min, the printing plate roller is an electroengraving plate, the plate depth is 20 to 50 mu m, and the curing temperature is 40 to 80 ℃.
4. The method for preparing the polystyrene plastic sealing film as claimed in claim 1, wherein the curing in the step (3) is performed at a temperature of 30 to 50 ℃ for 12 to 24 hours.
5. A polystyrene plastic sealing film, which is characterized by being prepared by the preparation method of any one of claims 1 to 4.
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| CN202111385601.5A CN114015281B (en) | 2021-11-22 | 2021-11-22 | Polystyrene plastic sealing film and preparation method thereof |
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| CN202111385601.5A CN114015281B (en) | 2021-11-22 | 2021-11-22 | Polystyrene plastic sealing film and preparation method thereof |
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| CN114015281A CN114015281A (en) | 2022-02-08 |
| CN114015281B true CN114015281B (en) | 2023-03-17 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1055807A (en) * | 1964-01-10 | 1967-01-18 | Riegel Paper Corp | Heat-sealable,moistureproof coating composition and coated packaging material incorporating same |
| US20080057205A1 (en) * | 2005-06-17 | 2008-03-06 | Roehm Gmbh | Heat-Sealing Compound For Sealing Aluminium Foil And Polyethlene Terephthalate Film To Polypropylene, Polyvinyl Chloride and Polystyrene Containers |
| CN103273714A (en) * | 2013-06-03 | 2013-09-04 | 靖江瑞泰电子材料有限公司 | Heat seal cover tape and preparation method of heat seal cover tape |
| JP2014228782A (en) * | 2013-05-24 | 2014-12-08 | 東洋インキＳｃホールディングス株式会社 | Heat seal label excellent in adhesive strength |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3921677A1 (en) * | 1989-07-01 | 1991-01-10 | Basf Ag | SEALABLE PLASTIC FILM |
| WO2002068557A1 (en) * | 2001-02-07 | 2002-09-06 | Röhm GmbH & Co. KG | Hot sealing compound for aluminum foils applied to polypropylene and polystyrene |
| CN101665174B (en) * | 2009-10-21 | 2011-11-09 | 浙江金石包装有限公司 | Manufacturing method of hot melt adhesive aluminum foil sealing film |
| CN103045130B (en) * | 2012-12-10 | 2015-01-21 | 江苏中金玛泰医药包装有限公司 | Heat-sealing adhesive for polystyrene and preparation method of heat-sealing adhesive |
| CN103252960B (en) * | 2013-06-08 | 2015-09-16 | 佛山市运通晨塑料助剂有限公司 | A kind of wear-resisting cigarette pack film and production method thereof |
-
2021
- 2021-11-22 CN CN202111385601.5A patent/CN114015281B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1055807A (en) * | 1964-01-10 | 1967-01-18 | Riegel Paper Corp | Heat-sealable,moistureproof coating composition and coated packaging material incorporating same |
| US20080057205A1 (en) * | 2005-06-17 | 2008-03-06 | Roehm Gmbh | Heat-Sealing Compound For Sealing Aluminium Foil And Polyethlene Terephthalate Film To Polypropylene, Polyvinyl Chloride and Polystyrene Containers |
| JP2014228782A (en) * | 2013-05-24 | 2014-12-08 | 東洋インキＳｃホールディングス株式会社 | Heat seal label excellent in adhesive strength |
| CN103273714A (en) * | 2013-06-03 | 2013-09-04 | 靖江瑞泰电子材料有限公司 | Heat seal cover tape and preparation method of heat seal cover tape |
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