CN112123908B - Degradable polyester synthetic paper and preparation method thereof - Google Patents
Degradable polyester synthetic paper and preparation method thereof Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08J5/18—Manufacture of films or sheets
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/0427—Coating with only one layer of a composition containing a polymer binder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/716—Degradable
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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
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- 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
- C08J2423/10—Homopolymers or copolymers of propene
- C08J2423/12—Polypropene
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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
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
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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
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2467/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
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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
- C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2475/04—Polyurethanes
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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
- C08J2479/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen, or carbon only, not provided for in groups C08J2461/00 - C08J2477/00
- C08J2479/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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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
- C08K3/36—Silica
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Abstract
The invention discloses degradable polyester synthetic paper and a preparation method thereof. The degradable polyester synthetic paper comprises a printing layer, a film upper surface layer, a base layer and a film lower surface layer; the printing layer is formed by coating a coating liquid on the surface of the upper surface layer of the film, curing and drying, the components of the upper surface layer of the film and the lower surface layer of the film are the same, and the main components are an opening agent, an anti-ultraviolet agent and degradable polyester; the main components of the base layer are degradable polyester, additive, polypropylene and white master batch. The degradable polyester synthetic paper prepared by the invention can be used for UV ink printing, carbon ribbon printing and writing, has the characteristics of moisture resistance, light weight and degradability, has good physical and mechanical properties, and can be applied to the fields of electronic product labels and the like.
Description
Technical Field
The invention belongs to the field of polyester films, and particularly relates to degradable polyester synthetic paper and a preparation method thereof.
Background
Due to the continuous expansion of the use of polymer material products and the increasing use amount of polymer material products, the used plastic product wastes are increased day by day, which brings a serious problem of environmental pollution and poses a great threat to the environment, and thousands of tons of plastic wastes are discharged worldwide every year. Therefore, the main focus of the problem research in recent years is how to treat the waste of the polymer plastics. The polyester film is thermoplastic plastic, waste edges and waste materials produced in production can be recycled, and packaging products can be recycled, but the polyester film is slowly degraded in a landfill site after being used. The research and development and the production of the high-performance degradable polyester film have important significance for the polyester film industry, and are one of the future development trends of the polyester film. The polyester film synthetic paper can partially replace paper and is used in the field of labels, has the characteristics of light weight, corrosion resistance, high strength, printable and printable surface and the like, and has the degradable performance, favorable environmental protection and wide application prospect.
Disclosure of Invention
The invention provides degradable polyester synthetic paper and a preparation method thereof, wherein the polyester synthetic paper has degradable performance by a copolymerization modification method, the polyester synthetic paper has the functions of printing UV ink, carbon ribbon printing and writing by a film surface coating method, the polyester synthetic paper has light weight by a method of adding polypropylene, and the prepared degradable polyester synthetic paper can be applied to the fields of electronic product labels and the like.
The technical scheme adopted by the invention is as follows:
1. a degradable polyester synthetic paper:
the degradable polyester synthetic paper comprises a printing layer, a film upper surface layer, a base layer and a film lower surface layer; the printing layer is formed by coating, curing and drying coating liquid on the surface of the upper surface layer of the film and has the functions of printing UV ink, printing by a carbon ribbon and writing; the components of the upper surface layer of the film and the lower surface layer of the film are the same, and the main components are an opening agent, an anti-ultraviolet agent and degradable polyester; the main components of the base layer are degradable polyester, additive, polypropylene and white master batch.
The upper surface layer and the lower surface layer of the film respectively comprise 86-88% of degradable polyester, 10% of an opening agent and 2-4% of an anti-ultraviolet agent, wherein the opening agent mainly comprises 1% of silicon dioxide by weight, and the carrier is degradable polyester; the main component of the uvioresistant agent is 20 percent of polyimidazole by weight, and the carrier is degradable polyester.
The coating liquid comprises polyurethane, polyester, an antistatic agent, silicon dioxide, butanone and ethyl acetate.
The base layer mainly comprises 70-80% of degradable polyester, 2% of additive, 3% of polypropylene and 15-25% of white masterbatch.
Wherein, the additive is polylactic acid, the main component of the white mother is titanium dioxide with the weight percentage of 60 percent, and the carrier is degradable polyester. A small amount of polylactic acid is added into the polyester synthetic paper, so that the degradation rate of the polyester synthetic paper can be accelerated.
The unit density of the polyester film can be reduced by adding a small amount of polypropylene into the polyester synthetic paper, the polyester and the polypropylene are incompatible systems, two phases form a sea-island structure, and a cavity system is formed in the stretching process, so that the film is light. The polyester synthetic paper can be made white by adding a certain amount of white mother material.
The degradable polyester is a copolymer, the copolymer is mainly formed by copolymerizing a carboxylic acid component and an alcohol component, and the molar addition amount of the alcohol component in the copolymer is 1.2 times that of the carboxylic acid component; wherein, the carboxylic acid component comprises 2,5-furandicarboxylic acid, terephthalic acid and glutaric acid, the alcohol component comprises ethylene glycol and butanediol, the molar ratio of the addition amount of the carboxylic acid component is 2,5-furandicarboxylic acid: terephthalic acid: glutaric acid =10 to 15: 70-80: 5 to 10; the molar ratio of the added alcohol component is ethylene glycol: butanediol =90 to 95:5 to 10.
The content of 2,5-furandicarboxylic acid, glutaric acid and butanediol is increased, and the degradation rate of polyester synthetic paper is accelerated. The content of terephthalic acid and glycol is increased, and the mechanical property of the polyester synthetic paper is improved.
The 60-degree glossiness value of the printing layer of the degradable polyester synthetic paper is 5-15, and the light transmittance of the degradable polyester synthetic paper is 10-20%.
The degradable polyester synthetic paper is detected for 120 days under the standard of ASTM D5511 and/or ISO15985, and the degradation rate reaches 15-40%.
2. Preparation method of degradable polyester synthetic paper
The method comprises the following specific steps:
1) Respectively blending, extruding and granulating silicon dioxide, polyimidazole and titanium dioxide with degradable polyester to prepare an opening agent, an anti-ultraviolet agent and a white mother material, and adding the degradable polyester, the opening agent and the anti-ultraviolet agent into a charging opening of an auxiliary extruder in proportion; adding degradable polyester, additive, polypropylene and white master batch into a charging hole of a main extruder in proportion.
2) And the double-screw extruder is used for obtaining the three-layer structure of the upper surface layer of the film, the base layer and the lower surface layer of the film of the degradable polyester synthetic paper after melt extrusion, sheet casting, biaxial stretching, heat setting and rolling.
3) Preparing a coating liquid, coating the surface of the upper surface of the film by an off-line coating mode to form a printing layer, wherein the coating thickness is 3-6 mu m, drying after coating, the drying temperature is 90-100 ℃, the coating thickness is 1-1.8 mu m after drying, and winding after coating to obtain the degradable polyester synthetic paper.
The coating liquid mainly comprises, by weight, 10-15% of polyurethane, 5-10% of polyester, 1% of an antistatic agent, 5-8% of silicon dioxide, 50-60% of butanone and 9-24% of ethyl acetate.
In the step 2): the heating temperature of the double-screw extruder is 230-260 ℃; the bidirectional stretching is longitudinal stretching and transverse stretching, wherein the longitudinal stretching temperature is 65-70 ℃, the longitudinal stretching ratio is 3.3-3.5, the transverse stretching temperature is 85-95 ℃, and the transverse stretching ratio is 3.0-3.2; the heat setting temperature is 190-205 ℃.
The invention has the beneficial effects that:
the color of the degradable polyester synthetic paper prepared by the invention is white, the surface of the degradable polyester synthetic paper can be printed with UV ink and printed and written by a carbon ribbon, and the degradable polyester synthetic paper has the characteristics of moisture resistance, degradability and light weight, has good physical and mechanical properties, and can be applied to the fields of books, labels and the like.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
1) The silicon dioxide, the polyimidazole and the titanium dioxide are respectively blended with the degradable polyester, extruded and granulated to prepare the opening agent, the uvioresistant agent and the white master batch. Adding 86% of degradable polyester, 10% of opening agent and 4% of uvioresistant agent into a feeding port of an auxiliary extruder according to weight components; adding 75% of degradable polyester, 2% of additive, 3% of polypropylene and 20% of white master batch into a feed inlet of a main extruder according to the weight components, wherein the additive is polylactic acid, and a small amount of polylactic acid is added into the polyester synthetic paper, so that the degradation rate of the polyester synthetic paper can be accelerated; the unit density of the polyester film can be reduced by adding a small amount of polypropylene into the polyester synthetic paper, the polyester and the polypropylene are incompatible systems, two phases form a sea-island structure, and a cavity system is formed in the stretching process, so that the film is light. The polyester synthetic paper can be made white by adding a certain amount of white mother material.
2) And a double-screw extruder, and the steps of melt extrusion, sheet casting, biaxial stretching, heat setting and rolling are carried out. The heating temperature interval of the double-screw extruder is 230-260 ℃; the bidirectional stretching is longitudinal stretching and transverse stretching, wherein the longitudinal stretching temperature is 65-70 ℃, the longitudinal stretching ratio is 3.3-3.5, the transverse stretching temperature is 85-95 ℃, and the transverse stretching ratio is 3.0-3.2; the heat setting temperature is 190-205 ℃.
3) A coating solution was prepared, which was composed of 10% by weight of polyurethane, 10% by weight of polyester, 1% by weight of antistatic agent, 8% by weight of silica, 57% by weight of methyl ethyl ketone, and 14% by weight of ethyl acetate. Coating the upper surface of the film by an off-line coating mode, wherein the coating thickness is 6 microns, drying after coating, the drying temperature is 90-100 ℃, the coating thickness is 1.8 microns after drying, forming a printing layer on the surface of the upper surface of the film, and rolling to obtain the degradable polyester synthetic paper.
Wherein the degradable polyester is copolymerized by 2,5-furandicarboxylic acid, terephthalic acid, glutaric acid, ethylene glycol and butanediol, wherein the molar ratio of the addition amount of the carboxylic acid component is 2,5-furandicarboxylic acid: terephthalic acid: glutaric acid =15:80:5; the molar ratio of the added alcohol component is ethylene glycol: butanediol =95:5, the amount of the alcohol component added was 1.2 times the molar amount of the carboxylic acid component added. The content of 2,5-furandicarboxylic acid, glutaric acid and butanediol is increased, the degradation rate of the polyester synthetic paper is accelerated, the content of terephthalic acid and ethylene glycol is increased, and the mechanical property of the polyester synthetic paper is improved.
The longitudinal tensile strength of the prepared degradable polyester synthetic paper with the thickness of 50 mu m is 185MPa, the degradation rate is 15 percent after 120 days under the test of ASTM D5511 and/or ISO15985 standard, the light transmittance is 13 percent, the 60-degree gloss value of the layer surface of the printing layer of the degradable polyester synthetic paper is 5, and the printing layer resists alcohol scraping for more than 100 times.
Example 2
1) The silicon dioxide, the polyimidazole and the titanium dioxide are respectively blended with the degradable polyester, extruded and granulated to prepare the opening agent, the uvioresistant agent and the white master batch. Adding 88 percent of degradable polyester, 10 percent of opening agent and 2 percent of uvioresistant agent into a feed inlet of an auxiliary extruder according to weight components; 77% of degradable polyester, 2% of additive, 3% of polypropylene and 18% of white master batch are added into a feed inlet of a main extruder according to the weight components, wherein the additive is polylactic acid, and a small amount of polylactic acid is added into the polyester synthetic paper, so that the degradation rate of the polyester synthetic paper can be accelerated; the unit density of the polyester film can be reduced by adding a small amount of polypropylene into the polyester synthetic paper, the polyester and the polypropylene are incompatible systems, two phases form a sea-island structure, and a cavity system is formed in the stretching process, so that the film is light. The polyester synthetic paper can be made white by adding a certain amount of white mother material.
2) And a double-screw extruder, and the steps of melt extrusion, sheet casting, biaxial stretching, heat setting and rolling are carried out. The heating temperature interval of the double-screw extruder is 230-255 ℃; the bidirectional stretching is longitudinal stretching and transverse stretching, wherein the longitudinal stretching temperature is 60-70 ℃, the longitudinal stretching ratio is 3.3-3.5, the transverse stretching temperature is 80-90 ℃, and the transverse stretching ratio is 3.0-3.2; the heat setting temperature is 190-205 ℃.
3) A coating liquid was prepared, which was composed of 13% polyurethane, 8% polyester, 1% antistatic agent, 6% silica, 59% methyl ethyl ketone, and 13% ethyl acetate by weight. Coating the upper surface of the thin film in an off-line coating mode, wherein the coating thickness is 4 microns, drying after coating, the drying temperature is 90-100 ℃, the coating thickness is 1.2 microns after drying, forming a printing layer on the surface of the upper surface of the thin film, and rolling to obtain the degradable polyester synthetic paper.
Wherein the degradable polyester is copolymerized by 2,5-furandicarboxylic acid, terephthalic acid, glutaric acid, ethylene glycol and butanediol, wherein the molar ratio of the addition amount of the carboxylic acid component is 2,5-furandicarboxylic acid: terephthalic acid: glutaric acid =20:75:5; the molar ratio of the added alcohol component is ethylene glycol: butanediol =95:5, the amount of the alcohol component added was 1.2 times the molar amount of the carboxylic acid component added. The content of 2,5-furandicarboxylic acid, glutaric acid and butanediol is increased, the degradation rate of the polyester synthetic paper is accelerated, the content of terephthalic acid and ethylene glycol is increased, and the mechanical property of the polyester synthetic paper is improved.
The longitudinal tensile strength of the prepared degradable polyester synthetic paper with the thickness of 50 mu m is 180MPa, the degradation rate is 25 percent after 120 days under the standard of ASTM D5511 and/or ISO15985, the light transmittance is 18 percent, the 60-degree gloss value of the layer surface of the printing layer of the degradable polyester synthetic paper is 10, and the printing layer resists alcohol scraping for more than 100 times.
Example 3
1) The silicon dioxide, the polyimidazole and the titanium dioxide are respectively blended with the degradable polyester, extruded and granulated to prepare the opening agent, the uvioresistant agent and the white master batch. Adding 88% of degradable polyester, 10% of opening agent and 2% of uvioresistant agent into a feed inlet of an auxiliary extruder according to weight components; adding 80% of degradable polyester, 2% of additive, 3% of polypropylene and 15% of white master batch into a feed inlet of a main extruder according to the weight components, wherein the additive is polylactic acid, and a small amount of polylactic acid is added into the polyester synthetic paper, so that the degradation rate of the polyester synthetic paper can be accelerated; the unit density of the polyester film can be reduced by adding a small amount of polypropylene into the polyester synthetic paper, the polyester and the polypropylene are incompatible systems, two phases form a sea-island structure, and a cavity system is formed in the stretching process, so that the film is light. The polyester synthetic paper can be made white by adding a certain amount of white mother material.
2) And a double-screw extruder, and the steps of melt extrusion, sheet casting, biaxial stretching, heat setting and rolling are carried out. The heating temperature interval of the double-screw extruder is 230-250 ℃; the bidirectional stretching is longitudinal stretching and transverse stretching, wherein the longitudinal stretching temperature is 60-70 ℃, the longitudinal stretching ratio is 3.3-3.5, the transverse stretching temperature is 80-90 ℃, and the transverse stretching ratio is 3.0-3.2; the heat setting temperature is 190-205 ℃.
3) A coating solution was prepared consisting of 15% polyurethane, 10% polyester, 1% antistatic agent, 5% silica, 50% butanone, 19% ethyl acetate by weight. Coating the upper surface of the thin film in an off-line coating mode, wherein the coating thickness is 3 mu m, drying after coating, the drying temperature is 90-100 ℃, the coating thickness is 1 mu m after drying, forming a printing layer on the surface of the upper surface of the thin film, and rolling to obtain the degradable polyester synthetic paper.
Wherein the degradable polyester is copolymerized by 2,5-furandicarboxylic acid, terephthalic acid, glutaric acid, ethylene glycol and butanediol, wherein the molar ratio of the addition amount of the carboxylic acid component is 2,5-furandicarboxylic acid: terephthalic acid: glutaric acid =20:70:10; the molar ratio of the added alcohol component is ethylene glycol: butanediol =90:10, the amount of the alcohol component added was 1.2 times the molar amount of the carboxylic acid component added. The content of 2,5-furandicarboxylic acid, glutaric acid and butanediol is increased, the degradation rate of the polyester synthetic paper is accelerated, the content of terephthalic acid and ethylene glycol is increased, and the mechanical property of the polyester synthetic paper is improved.
The longitudinal tensile strength of the prepared degradable polyester synthetic paper with the thickness of 50 mu m is 176MPa, the degradation rate is 40 percent after 120 days under the standard of ASTM D5511 and/or ISO15985, the light transmittance is 19 percent, the 60-degree gloss value of the layer surface of the printing layer of the degradable polyester synthetic paper is 15, and the printing layer resists alcohol scraping for more than 100 times.
The implementation result shows that the degradable polyester synthetic paper prepared by the invention has good mechanical property, better degradable property, environmental protection, suitability for treating the waste polyester synthetic paper by an industrial landfill method and obvious technical effect.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent modifications made by the present invention in the specification are included in the scope of the present invention.
Claims (6)
1. A degradable polyester synthetic paper is characterized in that: the degradable polyester synthetic paper comprises a printing layer, a film upper surface layer, a base layer and a film lower surface layer; the printing layer is formed by coating a coating liquid on the surface of the upper surface layer of the film, curing and drying, the components of the upper surface layer of the film and the lower surface layer of the film are the same, and the main components are an opening agent, an anti-ultraviolet agent and degradable polyester; the main components of the base layer are degradable polyester, additive, polypropylene and white mother;
the degradable polyester is a copolymer, the copolymer is mainly formed by copolymerizing a carboxylic acid component and an alcohol component, and the molar addition amount of the alcohol component in the copolymer is 1.2 times that of the carboxylic acid component; wherein, the carboxylic acid component comprises 2,5-furandicarboxylic acid, terephthalic acid and glutaric acid, the alcohol component comprises ethylene glycol and butanediol, the molar ratio of the addition amount of the carboxylic acid component is 2,5-furandicarboxylic acid: terephthalic acid: glutaric acid =10 to 15:70 to 80:5 to 10; the molar ratio of the added alcohol component is ethylene glycol: butanediol =90 to 95:5 to 10;
the upper surface layer and the lower surface layer of the film respectively comprise 86-88% of degradable polyester, 10% of an opening agent and 2~4% of an uvioresistant agent, wherein the opening agent mainly comprises 1% of silicon dioxide by weight, and the carrier is degradable polyester; the main component of the uvioresistant agent is 20 percent of polyimidazole by weight, and the carrier is degradable polyester;
the coating liquid comprises polyurethane, polyester, an antistatic agent, silicon dioxide, butanone and ethyl acetate;
the base layer mainly comprises 70-80% of degradable polyester, 2% of additive, 3% of polypropylene and 15-25% of white mother, wherein the additive is polylactic acid, the white mother mainly comprises titanium dioxide with the weight component of 60%, and the carrier is degradable polyester.
2. The degradable polyester synthetic paper according to claim 1, wherein:
the 60-degree gloss value of the layer surface of the printing layer of the degradable polyester synthetic paper is 5 to 15, and the light transmittance of the degradable polyester synthetic paper is 10 to 20%.
3. The degradable polyester synthetic paper according to claim 1, wherein: the degradable polyester synthetic paper is detected for 120 days under the standard of ASTM D5511 and/or ISO15985, and the degradation rate reaches 15 to 40 percent.
4. A method for preparing the degradable polyester synthetic paper according to any one of claims 1 to 3, wherein the method comprises the following steps: the method comprises the following specific steps:
1) Respectively blending, extruding and granulating silicon dioxide, polyimidazole and titanium dioxide with degradable polyester to prepare an opening agent, an anti-ultraviolet agent and a white mother material, and adding the degradable polyester, the opening agent and the anti-ultraviolet agent into a charging opening of an auxiliary extruder in proportion; adding degradable polyester, an additive, polypropylene and white masterbatch into a feed inlet of a main extruder in proportion;
the degradable polyester is a copolymer, the copolymer is mainly formed by copolymerizing a carboxylic acid component and an alcohol component, and the molar addition amount of the alcohol component in the copolymer is 1.2 times that of the carboxylic acid component; wherein, the carboxylic acid component comprises 2,5-furandicarboxylic acid, terephthalic acid and glutaric acid, the alcohol component comprises ethylene glycol and butanediol, the molar ratio of the addition amount of the carboxylic acid component is 2,5-furandicarboxylic acid: terephthalic acid: glutaric acid =10 to 15:70 to 80:5 to 10; the molar ratio of the added alcohol component is ethylene glycol: butanediol =90 to 95:5 to 10;
2) The double-screw extruder is used for obtaining a three-layer structure of an upper surface layer of the film, a base layer and a lower surface layer of the film of the degradable polyester synthetic paper after melt extrusion, sheet casting, biaxial stretching, heat setting and rolling;
the heating temperature of the double-screw extruder in the step 2) is 230 to 260 ℃;
3) Preparing a coating liquid, coating the surface of the upper surface of the film by an off-line coating mode to form a printing layer, wherein the coating thickness is 3~6 mu m, drying after coating, the drying temperature is 90-100 ℃, the coating thickness is 1-1.8 mu m after drying, and winding after coating to obtain the degradable polyester synthetic paper.
5. The method for preparing degradable polyester synthetic paper according to claim 4, wherein the method comprises the following steps: the coating liquid mainly comprises 10 to 15 percent of polyurethane, 5 to 10 percent of polyester, 1 percent of antistatic agent, 5~8 percent of silicon dioxide, 50 to 60 percent of butanone and 9 to 24 percent of ethyl acetate by weight.
6. The method for preparing degradable polyester synthetic paper according to claim 4, wherein the method comprises the following steps: in the step 2): the biaxial stretching is longitudinal stretching and then transverse stretching, wherein the longitudinal stretching temperature is 65 to 70 ℃, the longitudinal stretching ratio is 3.3 to 3.5, the transverse stretching temperature is 85 to 95 ℃, and the transverse stretching ratio is 3.0 to 3.2; the heat setting temperature is 190 to 205 ℃.
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| GB757043A (en) * | 1954-02-10 | 1956-09-12 | Du Pont | Improvements in polymeric materials and methods of preparing them |
| JPH0564862A (en) * | 1991-02-27 | 1993-03-19 | Oji Yuka Synthetic Paper Co Ltd | Synthetic paper excellent in pencil writing properties and printability |
| KR100197891B1 (en) * | 1996-06-10 | 1999-06-15 | 남창우 | Synthetic plastic paper and method for manufacturing the same |
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| CN102909982A (en) * | 2012-09-12 | 2013-02-06 | 浙江欧丽数码喷绘材料有限公司 | Waterproof PP(propene polymer) synthesized paper for ink-jet printing and preparation method thereof |
| CN103242723A (en) * | 2013-05-28 | 2013-08-14 | 广东邦固化学科技有限公司 | Printable anti-scraping release agent as well as applications thereof |
| CN104441709B (en) * | 2014-11-24 | 2017-01-18 | 天津万华股份有限公司 | Preparation method of polyester film for coating tag |
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| CN106928483B (en) * | 2017-03-23 | 2019-07-30 | 江苏耐斯数码科技股份有限公司 | A kind of printing material and preparation method of print film class |
| CN107031153B (en) * | 2017-03-30 | 2019-08-13 | 齐庆德 | A kind of preparation method of biodegradable multi-layer co-extruded material |
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