CN111270556B - Card paper composite material and preparation method thereof - Google Patents
Card paper composite material and preparation method thereof Download PDFInfo
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- CN111270556B CN111270556B CN202010157175.9A CN202010157175A CN111270556B CN 111270556 B CN111270556 B CN 111270556B CN 202010157175 A CN202010157175 A CN 202010157175A CN 111270556 B CN111270556 B CN 111270556B
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- 239000002131 composite material Substances 0.000 title claims abstract description 70
- 238000002360 preparation method Methods 0.000 title abstract description 14
- 239000011248 coating agent Substances 0.000 claims abstract description 72
- 238000000576 coating method Methods 0.000 claims abstract description 72
- 239000000463 material Substances 0.000 claims abstract description 66
- 239000011087 paperboard Substances 0.000 claims abstract description 54
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims abstract description 38
- 239000007864 aqueous solution Substances 0.000 claims abstract description 26
- 238000013329 compounding Methods 0.000 claims abstract description 10
- -1 polyoxyethylene Polymers 0.000 claims abstract description 9
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims abstract description 7
- URAYPUMNDPQOKB-UHFFFAOYSA-N triacetin Chemical compound CC(=O)OCC(OC(C)=O)COC(C)=O URAYPUMNDPQOKB-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000080 wetting agent Substances 0.000 claims abstract description 6
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 5
- 108010010803 Gelatin Proteins 0.000 claims abstract description 4
- 239000008139 complexing agent Substances 0.000 claims abstract description 4
- 238000007766 curtain coating Methods 0.000 claims abstract description 4
- 229920000159 gelatin Polymers 0.000 claims abstract description 4
- 239000008273 gelatin Substances 0.000 claims abstract description 4
- 235000019322 gelatine Nutrition 0.000 claims abstract description 4
- 235000011852 gelatine desserts Nutrition 0.000 claims abstract description 4
- 235000013773 glyceryl triacetate Nutrition 0.000 claims abstract description 3
- 238000007761 roller coating Methods 0.000 claims abstract description 3
- 229960002622 triacetin Drugs 0.000 claims abstract description 3
- 239000001087 glyceryl triacetate Substances 0.000 claims abstract 2
- 238000010345 tape casting Methods 0.000 claims abstract 2
- 239000011111 cardboard Substances 0.000 claims description 29
- 238000002156 mixing Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000003490 calendering Methods 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- 238000005096 rolling process Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 239000003381 stabilizer Substances 0.000 claims description 5
- ASJCVVGLGXVRGQ-UHFFFAOYSA-N 1-butyl-2-methoxybenzene Chemical compound CCCCC1=CC=CC=C1OC ASJCVVGLGXVRGQ-UHFFFAOYSA-N 0.000 claims description 4
- WJFKNYWRSNBZNX-UHFFFAOYSA-N 10H-phenothiazine Chemical compound C1=CC=C2NC3=CC=CC=C3SC2=C1 WJFKNYWRSNBZNX-UHFFFAOYSA-N 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 239000004202 carbamide Substances 0.000 claims description 4
- 235000013877 carbamide Nutrition 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 229950000688 phenothiazine Drugs 0.000 claims description 4
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- NVBFHJWHLNUMCV-UHFFFAOYSA-N sulfamide Chemical compound NS(N)(=O)=O NVBFHJWHLNUMCV-UHFFFAOYSA-N 0.000 claims description 2
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical class C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 claims 1
- 239000000123 paper Substances 0.000 abstract description 47
- 238000004064 recycling Methods 0.000 abstract description 6
- 239000002195 soluble material Substances 0.000 abstract description 2
- 229920003023 plastic Polymers 0.000 description 18
- 239000004033 plastic Substances 0.000 description 18
- 238000004806 packaging method and process Methods 0.000 description 16
- 239000011091 composite packaging material Substances 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 239000005022 packaging material Substances 0.000 description 5
- 230000000704 physical effect Effects 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 239000002994 raw material Substances 0.000 description 4
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 4
- 238000010525 oxidative degradation reaction Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000011343 solid material Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011127 biaxially oriented polypropylene Substances 0.000 description 1
- 229920006378 biaxially oriented polypropylene Polymers 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010668 complexation reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000003906 humectant Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000012149 noodles Nutrition 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
Classifications
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/12—Coatings without pigments applied as a solution using water as the only solvent, e.g. in the presence of acid or alkaline compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J171/00—Adhesives based on polyethers obtained by reactions forming an ether link in the main chain; Adhesives based on derivatives of such polymers
- C09J171/02—Polyalkylene oxides
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/21—Paper; Textile fabrics
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2400/00—Presence of inorganic and organic materials
- C09J2400/20—Presence of organic materials
- C09J2400/28—Presence of paper
- C09J2400/283—Presence of paper in the substrate
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2471/00—Presence of polyether
Abstract
The invention belongs to the field of preparation and application of paper-based composite materials, and discloses a paperboard composite material and a preparation method thereof, wherein the paperboard composite material is obtained by coating and compounding an environment-friendly water-soluble material coating and paperboard on a coating unit; the coating mode can be knife coating, roller coating, curtain coating and the like. The water-soluble coating material for the paperboard composite material comprises the following components in parts by weight: 100 parts of modified polyoxyethylene aqueous solution; 0.1-0.5 part of gelatin; 5-10 parts of a complexing agent; 5-10 parts of isopropanol; 1-5 parts of triacetin; 0.3-1.0 part of base material wetting agent; 0.5-1.0 part of leveling agent. The components are mixed for 30 to 60 minutes at 50 ℃. The paperboard coated and compounded by the coating not only has excellent heat-seal adhesion, but also can realize the renewable recycling of paperboard composite materials.
Description
Technical Field
The invention belongs to the field of preparation and application of paper-based composite materials, and particularly relates to a card paper composite material and a preparation method thereof.
Background
The soft package of our country is popular in the end of the last 70 th century. With the introduction of packaging equipment, flexible packages and composite packaging materials thereof have been rapidly developed. The composite packaging material is a packaging material with a two-dimensional structure formed by combining two or more materials with different properties by methods such as laminating, co-extruding and the like. The composite packaging material follows the combination of good advantages and short disadvantages on the microstructure, exerts the advantages of the substances, enlarges the application range, improves the economic benefit and makes the composite packaging material become a more practical and complete packaging material. The paper-plastic composite packaging material has the characteristics of light resistance, safety, sanitation, convenient use, low cost and the like, is widely applied to the fields of food, medicine, chemicals and daily necessities packaging, disposable consumption packaging, disposable convenient bags and the like by all countries in the world, and is greatly increased every year. Therefore, the method has very important significance for the research on the aspects of the material and the structure of the paper-plastic composite packaging material, the domestic and foreign recycling and the like.
The paper-plastic composite packing material is a kind of basic structure material made of paper base (paper, paperboard and cardboard), and is combined with another or more than one kind of film material by one or more times of composite process to form a composite material with certain functions.
The card paper belongs to one of paper-based materials and is a general name of thick paper between paper and paper board; the card paper has various products, such as common craft paper, coating craft paper, fine dried noodle craft paper, single-sided craft paper and double-sided craft paper. It is a gram weight (GSM) of 100-350 g/m2And (3) a range. The packaging paper box is mainly applied to packaging paper boxes, hand bags, general packages and the like.
The paper-based composite material is generally subjected to paper-plastic compounding by adopting plastics such as BOPP \ PET \ CPP \ PE and the like as base materials. The paper-plastic composite packaging material can be said to be an environment-friendly product.
At present, the production process of the paper-plastic composite material generally comprises the following steps: firstly, the paper material and the plastic are bonded and compounded through an adhesive; the method can also be divided into dry compounding and wet compounding, wherein the dry compounding is carried out by adopting a solvent-free adhesive; such as chinese patent publications CN106009155A, CN2635356Y, CN1445084A, etc.; the wet method adopts solvent type or water-based adhesive for compounding; such as chinese patent publications CN106584918A, CN105365282A, CN105328965A, CN105313411A, CN105291526A, CN105328964A, CN102069602A, CN101638559A, etc.; secondly, directly performing curtain coating and coating compounding on the paper material. Such as chinese patent publications CN106256706A, CN202480505U, etc.
In the future, the paper-plastic composite packaging material will mainly develop towards two aspects:
1. functional paper-plastic composite packaging material
The bag is developed from a common four-edge sealed bag to a self-standing bag; the zipper is developed towards a mouth inserting bag and an easy-tearing zipper bag; the packaging method is developed towards independent small packages; the production process is developed towards an environment-friendly packaging bag; the forced establishment of the traceability system enables the paper-plastic packaging bags to be developed in a bag-to-bag and code direction, and the like.
2. Low-temperature sealing paper-plastic composite packaging material
The future packaging machine has the advantages of simple and convenient requirements, energy conservation, speed improvement and efficiency increase so as to meet the requirements of modern large-batch packaging, wherein the use of low-temperature sealing packaging materials is a necessary condition. With the increasing demand of packaging, modern goods put more demands on packaging, which has promoted the innovative development of packaging materials to a great extent, from simple paper packaging, to single-layer plastic packaging, and then to paper-plastic composite packaging materials. In the future, the paper-plastic composite packaging material is bound to develop in the direction of serialization, multifunction, high performance, special function and the like, and shows a full market situation.
In summary, it can be seen that the paper-plastic composite material produced in mature production at present comprises a paper-based material, an adhesive material layer and a plastic film layer; besides the paper base material is an environment-friendly and environment-friendly material, other bonding layers and plastic layers compounded on the paper base material do not have the environment-friendly requirement, even the used paper base material can cause great trouble in recycling, the material layers which are not environment-friendly are not easy to separate, and the difficulty or the cost of recycling the paper base material is increased.
Disclosure of Invention
In order to overcome the disadvantages and shortcomings of the prior art, the present invention provides a recyclable and environmentally friendly composite material for cardboard, which is formed by combining a coating layer of an environmentally friendly water-soluble material with cardboard; the composite paperboard has the properties of environmental protection, safety and recycling, has excellent heat-sealing adhesion, can meet the technical requirements of mechanical high-speed automatic heat-sealing bag making, box making and the like, and greatly improves the production efficiency and the production quality of paper-based products. Can completely replace the production technology of bonding the traditional paper-based material products (paper bags and cartons) by adhesives, which has low efficiency. Because the prepared coating compounded with the paper base material has the properties of complete water solubility and biodegradation, the composite paperboard can be completely recycled, and the compounded water-soluble coating can directly enter a regenerated papermaking system and has the functions of reinforcing and toughening the paper base material.
The invention also aims to provide a preparation method of the paperboard composite material.
The purpose of the invention is realized by the following scheme:
the composite material of the cardboard is obtained by coating and compounding a water-soluble coating material for the composite material of the cardboard and cardboard, wherein the water-soluble coating material for the composite material of the cardboard at least comprises the following components in parts by weight:
the modified polyethylene oxide (PEO) aqueous solution (8-15%; wt%) is a self-prepared raw material prepared from molecular weight MW＝(1-10)x105The polyethylene oxide (PEO) is subjected to thermo-oxidative degradation (stirring for more than or equal to 4 hours at the temperature of 80 ℃ in the air and at the stirring speed of 300 revolutions per minute) to obtain an aqueous solution; controlling the final viscosity of the thermo-oxidative degradation polyethylene oxide (PEO) aqueous solution to be less than or equal to 3000(mPa & s) (25 ℃) as a modification end point; after reaching the end point, the reaction is terminated and a thermal oxygen stabilizer, which is one of phenothiazine, butyl hydroxy toluene, butyl anisole, etc., is added in an amount of 0.01-0.05% (wt%) of the aqueous solution of modified polyethylene oxide (PEO). The polyethylene oxide (PEO) selected includes one of WSR-N-10, WSR-N-80, WSR-N-750, WSR-N-3000, WSR-N-205, WSR-N-1105, and PEO-1, PEO-3, PEO-6, etc. manufactured by Nippon iron chemical industries, Inc. under the trade name Polyox, manufactured by United states carbide.
The gelatin is of industrial grade; the gelatin can form complexation with polyoxyethylene so as to improve the mechanical strength and the processing performance of the polyethylene oxide after film formation.
The complexing agent is one of carbamide and sulfamide (namely urea and thiourea). The complex formed by urea or thiourea and polyoxyethylene can greatly increase the melting point of polyoxyethylene to over 140 ℃, and does not influence the water solubility of the polyoxyethylene.
The isopropyl alcohol is added as a viscosity stabilizer for the polyethylene oxide aqueous solution.
The glycerol triacetate is a plasticizer.
The base material wetting agent is a low-foaming wetting agent, and the wetting agent is a surfactant capable of reducing the surface energy of a solid material and enabling the solid material to be easily soaked and permeated by the sizing modification liquid; the humectant is one of EASYTECH ST-5000, EASYTECH ST-5020, EASYTECH ST-5100, EASYTECHST-5030, EASYTECH ST-5040 and EASYTECH ST-5060 produced by Shanghai Sanguing chemical industry Co.
The leveling agent is one of LP0100, LP050A and LP050C produced by Guangzhou Wantou materials science and technology Limited.
A preparation method of a card paper composite material comprises the following steps:
(1) after measuring all components in the water-soluble coating material for the paperboard composite material, heating, stirring and uniformly mixing to obtain the water-soluble coating material for the paperboard composite material;
(2) the paperboard composite material is coated and compounded with the water-soluble coating material and the paperboard through a coating unit, and then the paperboard composite material which can be recycled is obtained after drying, calendaring and rolling.
The heating stirring mixing in the step (1) refers to stirring mixing at 50 ℃ for 30-60min, wherein the stirring is performed to fully mix the raw materials, so that the stirring speed is not limited.
The coating mode in the step (2) can be a blade coating mode, a roller coating mode, a curtain coating mode and the like;
the coating in the step (2) can be single-sided coating or double-sided coating, and the coating amount (single side) is 3-12 g/m2(dry weight of water-soluble coating material);
the gram weight of the paperboard in the step (2) is 100 and 350g/m in GSM2。
Compared with the prior art, the invention has the following advantages and beneficial effects:
the composite coating completely uses water as a medium, does not use any organic solvent in production, and is environment-friendly and safe; the used coating glue is both an adhesive of the paper base material and a composite film forming material; excellent adhesion to paper-based materials; after the paper-based material and the paper-based material are compounded into a film, the compound film layer has heat sealing performance, mechanical heat sealing bag making can be realized in the paper-plastic material preparation packaging bag, and the efficiency is high; fourthly, the method is suitable for preparing various paper-based packaging materials, and is particularly suitable for preparing the packages and the consumption of disposable fast-moving products such as shopping bags, disposable packaging bags (boxes), convenient bags (boxes) and the like; the coating film can be completely dissolved in water and can be used as a reinforcing agent of paper (wood pulp) fiber to enter the papermaking process, so that the complete renewable recycling is realized, and the paper-based composite material is a real environment-friendly renewable paper-based composite material.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto. It is noted that the processes described below, if not specifically described in detail, are all realizable or understandable by those skilled in the art with reference to the prior art. The raw materials or equipment used are not indicated by the manufacturer, and are regarded as conventional products which can be purchased commercially.
The weight (mass) parts used in the following examples and comparative examples may be given by way of example in the form of grams, kilograms, etc., or may be any other amount commonly used in the art.
In the following specific examples, an aqueous solution (8-15%) of modified polyethylene oxide (PEO) was used as a self-prepared raw material; with a molecular weight of MW＝(1-10)x105The polyethylene oxide (PEO) is subjected to thermo-oxidative degradation (stirring for more than or equal to 4 hours at the temperature of 80 ℃ in the air and at the stirring speed of 300 revolutions per minute) to obtain an aqueous solution; viscosity of the aqueous solution is less than or equal to 3000 (mPa.s) (25 ℃); polyethylene oxides (PEO) used for modification include WSR-N-10, WSR-N-80, WSR-N-750, WSR-N-3000, WSR-N-205, WSR-N-1105, available under the trade name Polyox from United states carbide corporation; and PEO-1, PEO-3, PEO-6, etc., produced by Nippon iron making chemical industries, Ltd. The penetrant is one of EASYTECH ST-5000, EASYTECH ST-5020, EASYTECH ST-5100, EASYTECHST-5030, EASYTECH ST-5040 and EASYTECH ST-5060 produced by Shanghai Mulberry well chemical industry Co. The leveling agent is one of LP0100, LP050A and LP050C produced by Guangzhou Wantou materials science and technology Limited.
In the specific embodiment, the paperboard bursting strength test conforms to the standard GB/T454-2002; the folding endurance test of the paperboard follows the standard GB/T457-; the heat seal performance test follows standard QB/T2358-98.
Example 1
A water-soluble coating material for a paperboard composite material comprises the following components in parts by weight:
PEO used in the modified PEO aqueous solution is WSR-N-10 produced by United states carbide company, and the solid content of the aqueous solution is 8 percent (wt percent); viscosity of 1820 mPas (25 ℃); phenothiazine was added at 0.01% (wt%).
The components are respectively measured, and are stirred and mixed uniformly in a container with a heating device to obtain the cardboard composite material and the water-soluble coating material for the preparation method thereof. The mixing temperature is 50 ℃; the mixing time was 60 minutes.
The water-soluble coating material is metered on a coating machine to be coated on the paperboard (100 g/m) of the paper-based material2) Drying, calendaring and rolling the surface of the paperboard composite material to obtain the recyclable paperboard composite material. The gram weight (GSM) of the coated paperboard is 100g/m2(ii) a One-side coating is carried out, the coating amount is 3 g/m2. The basic properties are shown in Table 1.
TABLE 1
Note: the blank is the cardboard which is not coated and compounded by the water-soluble coating material of the invention, and the same is carried out below.
From the above experimental data, it can be seen that the cardboard composite material prepared in example 1 not only has excellent heat sealability, but also has improved other mechanical and physical properties of cardboard.
Example 2
A water-soluble coating material for a paperboard composite material comprises the following components in parts by weight:
PEO used in the above-mentioned modified PEO aqueous solution was PEO-1 produced by Nippon iron chemical industries, Ltd., the aqueous solution had a solid content of 15% and a viscosity of 2960 mPas (25 ℃ C.), and 0.05% of butylhydroxytoluene was added.
The components are respectively measured, and are stirred and mixed uniformly in a container with a heating device to obtain the cardboard composite material and the water-soluble coating material for the preparation method thereof. The mixing temperature is 50 ℃; the mixing time was 60 minutes.
The above water-soluble coating material was metered onto cardboard (350 g/m) of a paper-based material on a coating machine2) Drying, calendaring and rolling the surface of the paperboard composite material to obtain the recyclable paperboard composite material. The gram weight (GSM) of the coated paperboard is 350g/m2(ii) a The single-side coating amount is 12 g/m2And performing double-sided coating. The basic properties are shown in Table 2.
TABLE 2
From the above experimental data, it can be seen that the cardboard composite material prepared in example 2 not only has excellent heat sealability, but also has improved other mechanical and physical properties of cardboard.
Example 3
A water-soluble coating material for a paperboard composite material comprises the following components in parts by weight:
PEO used in the above-mentioned aqueous solution of modified PEO was WSR-N-750 manufactured by United states carbide, the aqueous solution had a solid content of 10% and a viscosity of 2130mPa · s (25 ℃ C.), and 0.03% of butyl anisole was added.
The components are respectively measured, and are stirred and mixed uniformly in a container with a heating device to obtain the cardboard composite material and the water-soluble coating material for the preparation method thereof. The mixing temperature is 50 ℃; the mixing time was 30 minutes.
The above water-soluble coating material was metered onto cardboard (150 g/m) of a paper-based material on a coating machine2) Drying, calendaring and rolling the surface of the paperboard composite material to obtain the recyclable paperboard composite material. The Grammage (GSM) of the coated paperboard is 150g/m2(ii) a One-side coating is carried out, the coating amount is 8 g/m2. The basic properties are shown in Table 3.
TABLE 3
From the above experimental data, it can be seen that the cardboard composite material prepared in example 3 not only has excellent heat sealability, but also has improved other mechanical and physical properties of the cardboard.
Example 4
A water-soluble coating material for a paperboard composite material comprises the following components in parts by weight:
PEO used in the above-mentioned aqueous solution of modified PEO was WSR-N-205 produced by United states carbide, and the aqueous solution had a solid content of 9% and a viscosity of 2460 mPa.s (25 ℃ C.), and 0.02% of butyl anisole was added.
The components are respectively measured, and are stirred and mixed uniformly in a container with a heating device to obtain the cardboard composite material and the water-soluble coating material for the preparation method thereof. The mixing temperature is 50 ℃; the mixing time was 50 minutes.
The above water-soluble coating material is metered onto cardboard (200 g/m) of a paper-based material on a coating machine2) Drying, calendaring and rolling the surface of the paperboard composite material to obtain the recyclable paperboard composite material. The gram weight (GSM) of the coated paperboard is 200g/m2(ii) a One-side coating is carried out, the coating amount is 10 g/m2. The basic properties are shown in Table 4.
TABLE 4
From the above experimental data, it can be seen that the cardboard composite material prepared in example 4 not only has excellent heat sealability, but also has improved other mechanical and physical properties of cardboard.
Example 5
A water-soluble coating material for a paperboard composite material comprises the following components in parts by weight:
PEO used in the above-mentioned modified PEO aqueous solution was PEO-3 produced by Nippon iron chemical industries, Ltd., the aqueous solution had a solid content of 12% and a viscosity of 2360 mPas (25 ℃ C.), and phenothiazine was added in an amount of 0.03%.
The components are respectively measured, and are stirred and mixed uniformly in a container with a heating device to obtain the cardboard composite material and the water-soluble coating material for the preparation method thereof. The mixing temperature is 50 ℃; the mixing time was 40 minutes.
The above-mentioned water-soluble coating material is metered onto the paper substrate on a coating machineMaterial card paper (250 g/m)2) Drying, calendaring and rolling the surface of the paperboard composite material to obtain the recyclable paperboard composite material. The Grammage (GSM) of the coated paperboard is 250g/m2(ii) a The single-side coating amount is 10 g/m2(ii) a And (4) coating on two sides. The basic properties are shown in Table 5.
TABLE 5
From the above experimental data, it can be seen that the cardboard composite material prepared in example 5 not only has excellent heat sealability, but also has improved other mechanical and physical properties of cardboard.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (8)
1. The paperboard composite material is characterized by being obtained by coating and compounding paperboard composite material with water-soluble coating material and paperboard, wherein the water-soluble coating material for the paperboard composite material at least comprises the following components in parts by weight:
parts by weight
100 parts of modified polyoxyethylene aqueous solution
0.1-0.5 part of gelatin
5-10 parts of complexing agent
5-10 parts of isopropanol
1-5 parts of triacetin
0.3 to 1.0 portion of base material wetting agent
0.5-1.0 part of leveling agent;
saidThe modified polyoxyethylene aqueous solution is prepared by the following method: molecular weight MW=（1-10）x105Dissolving polyoxyethylene in water to form an aqueous solution with the mass fraction of 8-15%, stirring the aqueous solution at 80 ℃ in air for more than 4 hours, and adding a thermal oxygen stabilizer and stopping the reaction when the final viscosity of the aqueous solution is less than or equal to 3000 mPa.s to obtain the modified ethylene oxide aqueous solution;
the thermal oxygen stabilizer is one of phenothiazine, butyl hydroxy toluene and butyl anisole;
the dosage of the thermal oxygen stabilizer is 0.01-0.05wt% of the modified polyoxyethylene aqueous solution.
2. The paperboard composite of claim 1, wherein:
the polyethylene oxide comprises one of WSR-N-10, WSR-N-80, WSR-N-750, WSR-N-3000, WSR-N-205 and WSR-N-1105 which are manufactured by United states carbide company and are sold under the tradename Polyox, and PEO-1, PEO-3 and PEO-6 which are manufactured by Nippon iron chemical industry Co.
3. The paperboard composite of claim 1, wherein:
the complexing agent is one of carbamide and sulfamide.
4. The paperboard composite of claim 1, wherein:
the base material wetting agent is one of EASYTECH ST-5000, EASYTECH ST-5020, EASYTECH ST-5100, EASYTECHST-5030, EASYTECH ST-5040 and EASYTECH ST-5060 produced by Shanghai Sanguing chemical industry Co.
5. The paperboard composite of claim 1, wherein:
the leveling agent is one of LP0100, LP050A and LP050C produced by Guangzhou Wantou materials science and technology Limited.
6. A method for preparing a composite cardboard according to any of the claims 1 to 5, characterized in that it comprises the following steps:
(1) after measuring all components in the water-soluble coating material for the paperboard composite material, heating, stirring and uniformly mixing to obtain the water-soluble coating material for the paperboard composite material;
(2) coating and compounding the paperboard composite material with a water-soluble coating material and paperboard by a coating unit, and then drying, calendering and rolling to obtain the paperboard composite material.
7. The method for preparing a cardboard composite according to claim 6, characterized in that:
the heating, stirring and mixing in the step (1) refers to stirring and mixing at 50 ℃ for 30-60 min.
8. The method for preparing a cardboard composite according to claim 6, characterized in that:
the coating mode in the step (2) is knife coating, roller coating or curtain coating;
the coating in the step (2) is single-sided coating or double-sided coating, and the coating amount of each single side is 3-12 g/m based on the dry weight of the water-soluble coating material2；
The gram weight of the paperboard in the step (2) is 100-350 g/m2。
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| US5589528A (en) * | 1994-06-13 | 1996-12-31 | Bogardy; Lawrence S. | Hot melt glue based on modified waterbearing gels |
| CN1810908B (en) * | 2005-01-25 | 2010-10-13 | 深圳市比克电池有限公司 | Water-base adhesive |
| EP2879874B1 (en) * | 2012-08-01 | 2019-02-20 | Avery Dennison Corporation | Adhesive articles utilizing release agents free of silicon and fluorine, and related methods |
| CN102899001B (en) * | 2012-10-12 | 2015-11-11 | 华南理工大学 | A kind of preparation method of water-soluble non-setting adhesive |
| CN106398559A (en) * | 2016-08-30 | 2017-02-15 | 盐城市艾斯特体育器材有限公司 | Waterborne table tennis bat rubber covering attaching adhesive |
| CN108130002A (en) * | 2017-12-29 | 2018-06-08 | 中山荣思东数码科技有限公司 | A kind of biodegradable hot melt adhesive and preparation method thereof |
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