CN113999419A - Preparation method of degradable packaging board - Google Patents
Preparation method of degradable packaging board Download PDFInfo
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- CN113999419A CN113999419A CN202111184897.4A CN202111184897A CN113999419A CN 113999419 A CN113999419 A CN 113999419A CN 202111184897 A CN202111184897 A CN 202111184897A CN 113999419 A CN113999419 A CN 113999419A
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- plate body
- degradable packaging
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- preparing
- back coating
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- 238000004806 packaging method and process Methods 0.000 title claims abstract description 93
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000011248 coating agent Substances 0.000 claims abstract description 42
- 238000000576 coating method Methods 0.000 claims abstract description 42
- 238000002156 mixing Methods 0.000 claims abstract description 28
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 229920005989 resin Polymers 0.000 claims abstract description 13
- 239000011347 resin Substances 0.000 claims abstract description 13
- 239000003085 diluting agent Substances 0.000 claims abstract description 12
- 229920000954 Polyglycolide Polymers 0.000 claims abstract description 11
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052901 montmorillonite Inorganic materials 0.000 claims abstract description 11
- 239000004633 polyglycolic acid Substances 0.000 claims abstract description 11
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 238000001035 drying Methods 0.000 claims abstract description 10
- 239000003960 organic solvent Substances 0.000 claims abstract description 9
- 239000011044 quartzite Substances 0.000 claims abstract description 8
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims description 31
- 239000004743 Polypropylene Substances 0.000 claims description 24
- 239000003822 epoxy resin Substances 0.000 claims description 20
- 229920000647 polyepoxide Polymers 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 19
- 238000003756 stirring Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 17
- -1 polypropylene Polymers 0.000 claims description 14
- 229920001155 polypropylene Polymers 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 239000004611 light stabiliser Substances 0.000 claims description 10
- 238000001291 vacuum drying Methods 0.000 claims description 9
- 238000006116 polymerization reaction Methods 0.000 claims description 7
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 6
- 238000012644 addition polymerization Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 238000001746 injection moulding Methods 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 6
- 239000011265 semifinished product Substances 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 230000000977 initiatory effect Effects 0.000 claims description 5
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 4
- 239000006096 absorbing agent Substances 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 4
- 229920001911 maleic anhydride grafted polypropylene Polymers 0.000 claims description 4
- AFEQENGXSMURHA-UHFFFAOYSA-N oxiran-2-ylmethanamine Chemical compound NCC1CO1 AFEQENGXSMURHA-UHFFFAOYSA-N 0.000 claims description 4
- 238000007790 scraping Methods 0.000 claims description 4
- 230000003197 catalytic effect Effects 0.000 claims description 3
- 238000005469 granulation Methods 0.000 claims description 3
- 230000003179 granulation Effects 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- LTVUCOSIZFEASK-MPXCPUAZSA-N (3ar,4s,7r,7as)-3a-methyl-3a,4,7,7a-tetrahydro-4,7-methano-2-benzofuran-1,3-dione Chemical compound C([C@H]1C=C2)[C@H]2[C@H]2[C@]1(C)C(=O)OC2=O LTVUCOSIZFEASK-MPXCPUAZSA-N 0.000 claims description 2
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 claims description 2
- UWFRVQVNYNPBEF-UHFFFAOYSA-N 1-(2,4-dimethylphenyl)propan-1-one Chemical compound CCC(=O)C1=CC=C(C)C=C1C UWFRVQVNYNPBEF-UHFFFAOYSA-N 0.000 claims description 2
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 claims description 2
- QNYBOILAKBSWFG-UHFFFAOYSA-N 2-(phenylmethoxymethyl)oxirane Chemical compound C1OC1COCC1=CC=CC=C1 QNYBOILAKBSWFG-UHFFFAOYSA-N 0.000 claims description 2
- WTYYGFLRBWMFRY-UHFFFAOYSA-N 2-[6-(oxiran-2-ylmethoxy)hexoxymethyl]oxirane Chemical compound C1OC1COCCCCCCOCC1CO1 WTYYGFLRBWMFRY-UHFFFAOYSA-N 0.000 claims description 2
- CYCBPQPFMHUATH-UHFFFAOYSA-N 4-(oxiran-2-ylmethoxy)butan-1-ol Chemical compound OCCCCOCC1CO1 CYCBPQPFMHUATH-UHFFFAOYSA-N 0.000 claims description 2
- ULKLGIFJWFIQFF-UHFFFAOYSA-N 5K8XI641G3 Chemical compound CCC1=NC=C(C)N1 ULKLGIFJWFIQFF-UHFFFAOYSA-N 0.000 claims description 2
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 claims description 2
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 2
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 claims description 2
- 239000012965 benzophenone Substances 0.000 claims description 2
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 2
- 239000012964 benzotriazole Substances 0.000 claims description 2
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 claims description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 2
- 230000000593 degrading effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 21
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- 238000006731 degradation reaction Methods 0.000 abstract description 20
- 239000011247 coating layer Substances 0.000 abstract description 9
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052799 carbon Inorganic materials 0.000 abstract description 8
- 239000012752 auxiliary agent Substances 0.000 abstract description 7
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- 229920005629 polypropylene homopolymer Polymers 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
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- 235000001674 Agaricus brunnescens Nutrition 0.000 description 1
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- 241001330002 Bambuseae Species 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 1
- 206010051246 Photodermatosis Diseases 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
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- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 230000008845 photoaging Effects 0.000 description 1
- 238000006552 photochemical reaction Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
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- 238000010791 quenching Methods 0.000 description 1
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- 230000007281 self degradation Effects 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
-
- 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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- 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
- C08J2300/00—Characterised by the use of unspecified polymers
- C08J2300/16—Biodegradable 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
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—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
- C08J2353/00—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; 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
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- C08J2400/16—Biodegradable polymers
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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
- 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
- C08J2463/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
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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
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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- C08L2201/00—Properties
- C08L2201/06—Biodegradable
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
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Abstract
The invention discloses a preparation method of a degradable packaging plate, which comprises a plate body and a back coating layer formed by coating back coating liquid on the back surface of the plate body and drying, wherein PP resin and polyglycolic acid are used as main organic materials, quartzite and montmorillonite are used as inorganic fillers, titanium dioxide is used as dye or pigment for blending the overall appearance color of the plate body, and other auxiliary agents are added for mixing; simultaneously through the back coating that will constitute by epoxy, organic solvent, curing agent and diluent set up on the back of plate body, set up the protective layer to the back of plate body, back through the plate body with make the back coating combine together, it is effectual to make this degradable packaging panel compare current packaging panel outward appearance, the antipollution ability is strong, good degradation effect has, the accessible landfill can reach complete degradation gradually in natural environment, reach the low carbon, environmental protection, energy-conserving purpose.
Description
The application is a divisional application, the application number of the original application is 2019106150768, the application date is number 07 and 09 in 2019, and the patent names of the invention are as follows: a degradable packaging plate with good back coating effect and a preparation method thereof.
Technical Field
The invention belongs to the technical field of packaging materials, and particularly relates to a preparation method of a degradable packaging plate.
Background
The packaging plate is used for manufacturing packaging containers, packaging decoration, packaging printing, packaging transportation and the like, is a material used for meeting the packaging requirements of products, and comprises main packaging materials such as metal, plastic, glass, ceramics, paper, bamboo, wild mushrooms, natural fibers, chemical fibers, composite materials and the like, and auxiliary materials such as strapping, decoration, printing materials and the like. The packaging plate plays an important role in the whole packaging industry and is the basis for developing packaging technology, improving packaging quality and reducing packaging cost. Therefore, the method has important significance for understanding the performance, application range and development trend of the packaging plate, reasonably selecting the packaging plate, expanding the source of the packaging plate, adopting new packaging and new processing technology, creating novel packaging and packaging technology and improving the packaging technology level and the management level. However, the existing packaging plate material has poor performance as a packaging material, and particularly shows the aspects of appearance effect, anti-pollution capability, self-degradation effect after being discarded and the like.
Disclosure of Invention
The invention aims to overcome the problems of the prior art and provides a preparation method of a degradable packaging plate, which has the advantages of low manufacturing cost, bright appearance effect, strong pollution resistance, easy cleaning, gradual complete degradation by burying, good degradation effect and favorable environment protection.
In order to achieve the purpose, the invention adopts the following scheme:
the preparation method of the degradable packaging board comprises the following steps:
first, plate body preparation of degradable packaging plate
(1) Material handling and mixing
A. Adding quartzite, montmorillonite and titanium dioxide into a grinder for grinding for 35-40 min, and then sieving through a 100-mesh sieve to obtain a mixture A;
B. mixing PP resin and polyglycolic acid in a mixing stirrer for 18-25 minutes to obtain a mixture B;
C. adding the mixture A, the mixture B, the compatilizer and the light stabilizer into the mixture B, and mixing and stirring the mixture A, the mixture B, the compatilizer and the light stabilizer in a stirring kettle for 20-30 minutes at a stirring speed of 2600 and 4000 revolutions per minute; controlling the temperature to be 80-135 ℃, and then forming a mixture C through catalytic polymerization;
(2) vacuum drying
Vacuum drying the mixture C for 3-7 hours at the temperature of 25-45 ℃;
(3) melt extrusion
After vacuum drying, putting the mixture C into a double-screw extruder to be heated, melted, extruded and plasticized to obtain a semi-finished product, wherein the working conditions are as follows: the temperature is 210-250 ℃, and the rotating speed of the screw is 440-450 r/min;
(4) granulation and aftertreatment
Bracing the semi-finished product, cooling with cold air, drying and granulating, wherein the temperature of the cold air is kept at 35-40 ℃ in the cooling process; finally, putting the plate into an injection molding machine for injection molding to obtain a plate body;
preparation of second, back coating liquid
(1) Mixing the organic solvent and the diluent by stirring for 20-30 minutes; obtaining a mixed solution D;
(2) mixing and stirring the mixed solution D and the epoxy resin in a reaction kettle for 15-20 minutes, and then adding a curing agent for mixing and stirring for 7-15 minutes; then, carrying out addition polymerization reaction, wherein the temperature of the addition polymerization reaction is controlled to be 75-100 ℃ and the time is 5-8 hours, so as to obtain a back coating liquid;
third, the formation of the sheet
Putting the plate body into a coating machine prepared with back coating liquid, and carrying out back coating treatment on the back surface of the plate body in a scraping rolling conveying mode, wherein the wet coating amount is 1-2.5 g/m2And (3) conveying at a speed of 30-55 m/min, and drying the plate body subjected to back coating treatment at a drying temperature of 60-70 ℃ to obtain the degradable packaging plate.
The preparation method of the material of the degradable packaging board has the advantages of simple preparation process, easy control of reaction, good repeatability, good production quality, environment-friendly and safe process synthesis and little smell.
The back coating is prepared by coating back coating liquid on the plate body, and comprises the following components in percentage by weight:
the back coating is prepared from the following materials in percentage by weight:
the plate body of the degradable packaging plate is mainly prepared from PP resin, polyglycolic acid, quartzite, montmorillonite, titanium dioxide and other auxiliary agents, the sources of the materials are many, the cost is low, and the manufacturing process of the degradable packaging plate is simple, so that the total cost for preparing the degradable packaging plate is low, and the degradable packaging plate is suitable for mass production. PP resin and polyglycolic acid are used as main organic materials, quartzite and montmorillonite are used as inorganic fillers, titanium dioxide is used as a dye or pigment for blending the overall appearance and color of the plate body, and other auxiliary agents are added for mixing; meanwhile, the back coating layer composed of epoxy resin, an organic solvent, a curing agent and a diluent is arranged on the back surface of the plate body, the protective layer is arranged on the back surface of the plate body, and the plate body is combined with the back coating layer, so that the degradable packaging plate has a good appearance effect compared with the existing packaging plate, is high in pollution resistance, not easy to accumulate dust and easy to clean, is buried in a mud land with humidity of more than 50%, is seriously damaged and almost degraded after being buried for 1-2 years, has a good degradation effect, can gradually achieve complete degradation in a natural environment through burying, and achieves the purposes of low carbon, environmental protection and energy conservation.
Further, the PP resin is one or two of homo-polypropylene and block co-polypropylene. The mechanical toughness of the degradable packaging board is improved by taking the homo-polypropylene and the block co-polypropylene as PP resin, the degradable packaging board has good impact strength and rigidity, product packaging is facilitated, the degradable packaging board formed by combining the homo-polypropylene and the block co-polypropylene with materials such as polyglycolic acid is buried in a mud land with the humidity of more than 50%, and after the degradable packaging board is buried for 1-2 years, the PP resin is promoted to be degraded under the action of the polyglycolic acid, so that the degradable packaging board is seriously damaged and almost degraded, the degradation rate reaches more than 95%, and carbon dioxide and water which are not bad for the environment are generated.
Further, the particle size of the montmorillonite is less than 2 μm. The friction coefficient of the product is controlled by controlling the using amount and the particle size of the montmorillonite, so that the mechanical property of the degradable packaging plate is improved, the degradable packaging plate has good rigidity and strength, meanwhile, the montmorillonite is mainly silicon dioxide, and the environment cannot be damaged after the degradable packaging plate is degraded.
Further, the other auxiliary agents include a compatibilizer and a light stabilizer. The compatilizer is added in the material mixing, so that the PP resin, the polyglycolic acid and other materials are conveniently polymerized to form, the polymerization stability among the materials is enhanced, the degradable packaging board can obtain good mechanical property, has good rigidity and strength and good degradation effect, and can gradually achieve complete degradation in natural environment through landfill after being abandoned, thereby achieving the purposes of low carbon, environmental protection and energy saving.
Further, the compatilizer is maleic anhydride grafted polypropylene; the maleic anhydride grafted polypropylene comprises maleic anhydride, polypropylene and an initiation aid; the initiation aid comprises dicumyl peroxide or di-tert-butyl peroxide. The compatilizer is formed by maleic anhydride, polypropylene and an initiating auxiliary agent, so that the polymerization stability among materials is enhanced, the fusion among the materials is promoted, the degradable packaging board has good rigidity and strength and good degradation effect, and after being abandoned, the degradable packaging board can be gradually and completely degraded by being buried in a natural environment, and the purposes of low carbon, environmental protection and energy conservation are achieved.
Further, the light stabilizer is one or more of benzophenone ultraviolet absorbers and benzotriazole ultraviolet absorbers. The light stabilizer can shield or absorb the energy of ultraviolet rays, quench singlet oxygen, decompose hydroperoxide into inactive substances and the like, so that the degradable packaging board can eliminate or slow down the possibility of photochemical reaction under the radiation of light, and prevent or delay the process of photoaging, thereby achieving the purpose of prolonging the service life of the degradable packaging board.
Further, the epoxy resin is one or more of glycidyl ester type epoxy resin and glycidyl amine type epoxy resin. The glue coating layer formed by using the glycidyl ester type epoxy resin, the glycidyl amine type epoxy resin or the mixture of the glycidyl ester type epoxy resin and the glycidyl amine type epoxy resin to react with other materials has good bonding strength and chemical resistance.
Further, the curing agent is one or more of methyl nadic anhydride, 2-ethyl-4-methylimidazole and levo-trans-1, 2-cyclohexanediamine. The curing agent is mainly used for resin curing, is convenient for polymerization to form back coating liquid, and then can be convenient for setting a glue coating layer on a plate body so as to improve the overall appearance effect of the plate, has strong pollution resistance, is not easy to accumulate dust, and is easy to clean.
Further, the diluent is one of 1, 4-butanediol glycidyl ether, benzyl glycidyl ether, 1, 6-hexanediol diglycidyl ether and ethylene glycol diglycidyl ether. The epoxy resin is very thick, the diluent mainly has the effect of reducing the concentration of the epoxy resin, so that the epoxy resin is convenient to form on the diluted epoxy resin, and can also take part in reaction, wherein molecules in the diluent contain active groups, so that the diluent can react with a curing agent of an adhesive without gas escaping, the performance of a cured adhesive layer is generally not influenced, and the diluent has good environmental protection performance.
Further, the organic solvent II is one or more than two of toluene, N-dimethylformamide, tetrahydrofuran, N-dimethylacetamide and 1, 4-dioxane. Through these organic solvents, the epoxy resin of being convenient for fully reacts and mixes together, and the polymerization of being convenient for forms back of the body coating liquid, and then can be convenient for set up the rubber coating layer on the plate body to improve the holistic outward appearance effect of this panel, the antipollution ability is strong, is difficult for laying dust, easily cleans.
Further, the thickness of the plate body (1) is 1-8 mm; the thickness of the back coating is 4-6 μm. The thickness of this degradable packaging panel of reasonable control through the injection membrane to and the thickness of the back coating of control coating, make this degradable packaging panel's light in weight, convenient to use, the practicality is strong, has good outward appearance effect simultaneously.
Compared with the prior art, the invention has the following advantages:
1. the plate body of the degradable packaging plate is mainly prepared from PP resin, polyglycolic acid, quartzite, montmorillonite, titanium dioxide and other auxiliary agents, the sources of the materials are many, the cost is low, and the manufacturing process of the degradable packaging plate is simple, so that the total cost for preparing the degradable packaging plate with good middle and back coating effects is low, and the degradable packaging plate is suitable for mass production.
2. The invention takes PP resin and polyglycolic acid as main organic materials, quartzite and montmorillonite as inorganic fillers, titanium dioxide as dye or pigment for blending the overall appearance and color of the plate body, and other auxiliary agents are added for mixing; meanwhile, the back coating layer composed of epoxy resin, an organic solvent, a curing agent and a diluent is arranged on the back surface of the plate body, a protective layer is arranged on the back surface of the plate body, the back coating layer is combined with the back coating layer through the back surface of the plate body, so that the degradable packaging plate has a good appearance effect compared with the existing packaging plate, is high in pollution resistance, is not easy to accumulate dust and is easy to clean, and can be buried in a mud land with humidity of more than 50 percent, after the degradable packaging plate is buried for 1-2 years, the degradable packaging plate is seriously damaged and almost degraded, the degradation rate reaches more than 95 percent, a good degradation effect is achieved, complete degradation can be gradually achieved in a natural environment through burying, and the purposes of low carbon, environmental protection and energy conservation are achieved.
3. The preparation method of the material of the degradable packaging board has the advantages of simple preparation process, easy control of reaction, good repeatability, good production quality, environment-friendly and safe process synthesis and little smell.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic cross-sectional view of a plate body of the degradable packaging plate.
Detailed Description
The invention is further described below with reference to examples 1-6, as shown in FIG. 1:
a preparation method of a degradable packaging board comprises the following steps:
first, plate body preparation of degradable packaging plate
(1) Material handling and mixing
A. Adding quartzite, montmorillonite and titanium dioxide into a grinder for grinding for 35-40 min, and then sieving through a 100-mesh sieve to obtain a mixture A;
B. mixing PP resin and polyglycolic acid in a mixing stirrer for 18-25 minutes to obtain a mixture B;
C. adding the mixture A, the mixture B, the compatilizer and the light stabilizer into the mixture B, and mixing and stirring the mixture A, the mixture B, the compatilizer and the light stabilizer in a stirring kettle for 20-30 minutes at a stirring speed of 2600 and 4000 revolutions per minute; controlling the temperature to be 80-135 ℃, and then forming a mixture C through catalytic polymerization;
(2) vacuum drying
Vacuum drying the mixture C for 3-7 hours at the temperature of 25-45 ℃;
(3) melt extrusion
After vacuum drying, putting the mixture C into a double-screw extruder to be heated, melted, extruded and plasticized to obtain a semi-finished product, wherein the working conditions are as follows: the temperature is 210-250 ℃, and the rotating speed of the screw is 440-450 r/min;
(4) granulation and aftertreatment
Bracing the semi-finished product, cooling with cold air, drying and granulating, wherein the temperature of the cold air is kept at 35-40 ℃ in the cooling process; and finally, putting the plate body into an injection molding machine for injection molding to obtain the plate body 1.
Preparation of second, back coating liquid
(1) Mixing the organic solvent and the diluent by stirring for 20-30 minutes; obtaining a mixed solution D;
(2) mixing and stirring the mixed solution D and the epoxy resin in a reaction kettle for 15-20 minutes, and then adding a curing agent for mixing and stirring for 7-15 minutes; and then carrying out addition polymerization reaction, wherein the temperature of the addition polymerization reaction is controlled to be 75-100 ℃ and the time is 5-8 hours, so as to obtain the back coating liquid.
Third, the formation of the sheet
Putting the plate body 1 into a coating machine prepared with back coating liquid, and carrying out back coating treatment on the back surface of the plate body 1 in a scraping rolling conveying mode, wherein the wet coating amount is 1-2.5 g/m2And (3) conveying at a speed of 30-55 m/min, and drying the plate body 1 subjected to back coating treatment at a drying temperature of 60-70 ℃ to obtain the degradable packaging plate.
Table 1: examples 1 to 6 proportions of respective components of the plate body 1
Table 2: EXAMPLES 1-6 proportions of Components of Back coating 2
Table 3: process conditions of examples 1 to 6
TABLE 4 data from examples 1-6
This application is through putting into plate body 1 and being equipped with in the coating machine of back coating liquid, carry out the back coating through the mode of scraping face roll extrusion transport to plate body 1's the back and handle, the effectual degradable packaging panel of back coating that the stoving obtained, the surface is smooth, the phenomenon of bubble and delaminating does not appear in the surface, and have good bond strength, resistant dirt nature is strong, and high elongation at break, it is effectual to make this degradable packaging panel compare current packaging panel outward appearance, anti pollution can the reinforce, be difficult for the laying dust, easy to clean.
Table 5: according to the national standard GB 18006.1-1999, the degradable packaging boards in the embodiments 1-6 and the polypropylene packaging material added in the comparative example are placed in different environments, and the outer surface of the product is tested to be broken or not, and is subjected to a folding test for 15 times and a drop test in different time periods.
The degradable packaging boards of examples 1 to 6 and the polypropylene packaging material added in the comparative example were buried in mud land with a relative humidity of 50%, and then the test tests were performed on the degradable packaging boards of examples 1 to 6 and the polypropylene packaging material added in the comparative example.
Through experimental judgment that the degradable packaging plates in the embodiments 1-6 and the polypropylene packaging material added in the comparative example are placed in a dry land, the degradable packaging plates are buried in a mud land with the humidity of 50%, after being buried for 1-2 years, the degradable packaging plates are seriously damaged and almost degraded, the degradation rate reaches more than 95%, the degradable packaging plates have good degradation effect, can gradually achieve complete degradation in a natural environment through being buried, and achieve the purposes of low carbon, environmental protection and energy conservation.
Table 5: the degradable packaging plates of examples 1-6 and the polypropylene packaging material added in the comparative example were buried in mud land with relative humidity of 80%, and then the test tests were performed on the degradable packaging plates of examples 1-6 and the polypropylene packaging material added in the comparative example.
Through experimental judgment that the degradable packaging plates in the embodiments 1-6 and the polypropylene packaging material added in the comparative example are placed in a dry land, the degradable packaging plates are buried in a mud land with the humidity of 80%, after being buried for 1-2 years, the degradable packaging plates are seriously damaged and almost degraded, the degradation rate reaches more than 97%, the degradable packaging plates have good degradation effect, can gradually achieve complete degradation in a natural environment through being buried, and achieve the purposes of low carbon, environmental protection and energy conservation.
In conclusion, compared with the existing packaging plate, the degradable packaging plate has the advantages of good appearance effect, strong pollution resistance, difficulty in dust accumulation and easiness in cleaning, is buried in a mud land with the humidity of more than 50%, is seriously damaged and almost degraded after being buried for 1-2 years, has a good degradation effect, can be gradually and completely degraded in a natural environment by being buried, and achieves the purposes of low carbon, environmental protection and energy conservation.
While the embodiments of the present application have been described in detail, the present application is not limited to the embodiments described above. Even if various changes are made in the present application, the protection scope of the present application is still included.
Claims (10)
1. The preparation method of the degradable packaging board is characterized by comprising the following steps of:
firstly, preparing a plate body (1) capable of degrading packaging plates
(1) Material handling and mixing
A. Adding quartzite, montmorillonite and titanium dioxide into a grinder for grinding for 35-40 min, and then sieving through a 100-mesh sieve to obtain a mixture A;
B. mixing PP resin and polyglycolic acid in a mixing stirrer for 18-25 minutes to obtain a mixture B;
C. adding the mixture A, the mixture B, the compatilizer and the light stabilizer into the mixture B, and mixing and stirring the mixture A, the mixture B, the compatilizer and the light stabilizer in a stirring kettle for 20-30 minutes at a stirring speed of 2600 and 4000 revolutions per minute; controlling the temperature to be 80-135 ℃, and then forming a mixture C through catalytic polymerization;
(2) vacuum drying
Vacuum drying the mixture C for 3-7 hours at the temperature of 25-45 ℃;
(3) melt extrusion
After vacuum drying, putting the mixture C into a double-screw extruder to be heated, melted, extruded and plasticized to obtain a semi-finished product, wherein the working conditions are as follows: the temperature is 210-250 ℃, and the rotating speed of the screw is 440-450 r/min;
(4) granulation and aftertreatment
Bracing the semi-finished product, cooling with cold air, drying and granulating, wherein the temperature of the cold air is kept at 35-40 ℃ in the cooling process; finally, putting the plate into an injection molding machine for injection molding to obtain a plate body (1);
preparation of second, back coating liquid
(1) Mixing the organic solvent and the diluent by stirring for 20-30 minutes; obtaining a mixed solution D;
(2) mixing and stirring the mixed solution D and the epoxy resin in a reaction kettle for 15-20 minutes, and then adding a curing agent for mixing and stirring for 7-15 minutes; then, carrying out addition polymerization reaction, wherein the temperature of the addition polymerization reaction is controlled to be 75-100 ℃ and the time is 5-8 hours, so as to obtain a back coating liquid;
third, the formation of the sheet
Putting the plate body (1) into a coating machine prepared with back coating liquid, and carrying out back coating treatment on the back surface of the plate body (1) in a scraping rolling conveying mode, wherein the wet coating amount is 1-2.5 g/m2And (3) conveying at a speed of 30-55 m/min, and drying the plate body (1) subjected to back coating treatment at a drying temperature of 60-70 ℃ to obtain the degradable packaging plate.
2. The method for preparing the degradable packaging board as claimed in claim 1, wherein the compatibilizer is maleic anhydride grafted polypropylene.
3. The method for preparing the degradable packaging board as claimed in claim 2, wherein the maleic anhydride grafted polypropylene comprises maleic anhydride, polypropylene and initiation aid.
4. The method for preparing the degradable packaging board according to claim 3, wherein the initiation aid comprises dicumyl peroxide or di-tert-butyl peroxide.
5. The method for preparing the degradable packaging board according to claim 1, wherein the light stabilizer is one or more of benzophenone ultraviolet absorbers and benzotriazole ultraviolet absorbers.
6. The method for preparing the degradable packaging board according to claim 1, wherein the epoxy resin is one or more of glycidyl ester type epoxy resin and glycidyl amine type epoxy resin.
7. The method for preparing the degradable packaging board as claimed in claim 1, wherein the curing agent is one of methyl nadic anhydride, 2-ethyl-4-methylimidazole and levo-trans-1, 2-cyclohexanediamine.
8. The method for preparing the degradable packaging board according to claim 1, wherein the diluent is one of 1, 4-butanediol glycidyl ether, benzyl glycidyl ether, 1, 6-hexanediol diglycidyl ether and ethylene glycol diglycidyl ether.
9. The method for preparing the degradable packaging board according to claim 1, wherein the organic solvent di is one or more of toluene, N-dimethylformamide, tetrahydrofuran, N-dimethylacetamide and 1, 4-dioxane.
10. The method for preparing the degradable packaging board as claimed in claim 1, wherein the thickness of the board body (1) is 1 mm-8 mm; the thickness of the back coating (2) is 4-6 μm.
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