CN109505193A - A kind of composite paper-plastic material water-soluble coating material and preparation method thereof that recyclable regenerative utilizes - Google Patents
A kind of composite paper-plastic material water-soluble coating material and preparation method thereof that recyclable regenerative utilizes Download PDFInfo
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- CN109505193A CN109505193A CN201811062194.2A CN201811062194A CN109505193A CN 109505193 A CN109505193 A CN 109505193A CN 201811062194 A CN201811062194 A CN 201811062194A CN 109505193 A CN109505193 A CN 109505193A
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- soluble coating
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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
- D21H19/36—Coatings with pigments
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. clays
-
- 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
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
-
- 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
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/46—Non-macromolecular organic compounds
-
- 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
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/54—Starch
-
- 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
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/62—Macromolecular organic compounds or oligomers thereof obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- 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
-
- 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
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/10—Packing paper
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paper (AREA)
- Laminated Bodies (AREA)
- Wrappers (AREA)
Abstract
The invention discloses a kind of composite paper-plastic material water-soluble coating materials and preparation method thereof that recyclable regenerative utilizes, the water-soluble coating material includes polyvinyl alcohol (PVA), hydroxypropyl cellulose (HPC), glycerol, ethylene glycol, starch, precipitated silica, talcum powder, defoaming agent, levelling agent and water, it is added in the container with heating jacket after each component metering, it is warming up to 95 DEG C under stiring, keep the temperature 2-4 hours under stiring, then stop heating, and it is cooled to room temperature by collet cooling water, continue stirring 0.5 hour at room temperature, discharging is a kind of composite paper-plastic material water-soluble coating material that recyclable regenerative utilizes.The environmental protection of water-soluble coating material prepared by the present invention, safety, have excellent heat-sealing bonding, and can be realized the renewable of composite paper-plastic material and recycle.
Description
Technical field
The present invention relates to the preparation of paper-based composite material water-soluble coating material and application fields, and in particular to Yi Zhongke
Composite paper-plastic material water-soluble coating material of recycling and preparation method thereof.
Background technique
The flexible package in China was risen in the end of the seventies in last century.With the introduction of packaging facilities, flexible package and its compound packet
Package material develops rapidly.So-called compound package material be by two or more different performance material by it is laminated,
The packaging material with two-dimensional structure that the methods of co-extrusion is combined together to form.Compound package material follows in microstructure
The advantages of combination maximized favourable factors and minimized unfavourable ones, performance institute's component, expands use scope, increases economic efficiency, makes it one kind more
Practical, more complete packaging material.Paper-plastic composite packaging material is with its light blocking, safety and sanitation, easy to use and low in cost etc.
Feature is widely used in food, drug, chemicals and commodity packaging by countries in the world and one-time consumption is packed, once
The fields such as property shopping bag, and be all significantly incremented by every year.Therefore, to paper-plastic composite packaging material material, structure and both at home and abroad
The research of recycle etc. has a very important significance.
Paper-plastic composite packaging material be one kind using paper as basic structure material, with another kind or more than one thin-film materials,
It combines by one or many combination process, to constitute the composite material of certain function, has high-intensitive, anti-
The features such as aqueous good, appearance is beautiful is one of current most popular packaging material.
Usual film use BOPP PET CPP PE etc. for substrate, the paper then compound dedicated paper of use purification.Paper-plastic stick
Packaging material can be described as a kind of environment-friendly products.Depending on the application, about tens kinds of difference classification situations such as technique, are commonly used soft
Packaging field has brown paper, white brown paper, velvet paper, body paper, iridescent paper etc., quantitative from 25g/m2To 80g/m2Differ.
Currently, the production technology of composite paper-plastic material generally has: 1. realizing paper material and plastic bonding by adhesive
It carries out compound；Dry laminating can be divided into again and wet process is compound, dry laminating is compound using non-solvent adhesive progress；As specially
Sharp CN106009155A, CN2635356, CN1445084 etc.；Wet process is compound using solvent type or aqueous binder progress；Such as
Patent CN106584918A, CN105365282A, CN105328965A, CN105313411A, CN105291526A,
2. CN105328964A, CN102069602A, CN101638559 etc. carry out showering coating directly on paper material compound.Such as
Patent CN106256706A, CN202480505U etc..
Future, paper-plastic composite packaging material will mainly develop in terms of two:
1. functional paper-plastic composite packaging material
Develop from common four bandings sack to self-standing bag direction；To bag of interrupting, easily tears zippered bag direction and develop；It is small to independence
Packaging direction is developed；Develop to environment protection type package bag direction；The pressure constitution and implementation of traceability system, paper-plastic packing bag will be to one bags
One yard of direction is developed.
2. low temperature seals paper-plastic composite packaging material
The following package packing machine requires simple and convenient, energy saving, raising speed, increase efficiency, to adapt to modern high-volume
The needs of packaging, wherein the use of low temperature sealing packaging material being necessary condition.With being continuously increased for packaging demand, quotient is modernized
Product propose more requirements to packaging, this largely promotes the innovation and development of packaging material, from simple paper bag
Dress, to the plastics package of single layer, developing deeply to paper-plastic composite packaging material.Future, paper-plastic composite packaging material will be towards being
The directions such as columnization, multi-functional, high-performance, specific function are developed, and the market situation that a hundred flowers blossom is presented.
In conclusion it is not difficult to find out that, the paper material of mature production, includes paper base material, layer of adhesive material at present
And plastic film layers；Wherein other than paper base material belongs to environmental protection and environment-friendly material, other are combined on paper base material
Adhesive layer and plastic layer do not have environmental requirement, in addition after use paper base material recycling on will cause very big puzzlement, no
It is easy these material layers not environmentally to separate, the difficult increase or cost for also resulting in paper base material to recycle increase.
Summary of the invention
The purpose of the present invention is to provide a kind of composite paper-plastic material water-soluble coating materials that recyclable regenerative utilizes
And preparation method thereof, the recyclable composite paper-plastic material utilized water-soluble coating material environmental protection, safety have excellent
Heat-sealing bonding, and can be realized the renewable of composite paper-plastic material and recycle.
The purpose of the present invention is achieved through the following technical solutions.
A kind of composite paper-plastic material water-soluble coating material that recyclable regenerative utilizes at least wraps based on parts by weight
Include following component:
Preferably, the polyvinyl alcohol (PVA) is complete alcoholysis type polyvinyl alcohol；The complete alcoholysis type polyvinyl alcohol gathers
It is right be 1100~2000, alcoholysis degree 99%, complete alcoholysis type polyvinyl alcohol has that cold water is insoluble and the characteristic of hot water soluble.
Preferably, the hydroxypropyl cellulose (HPC) is molar substitution (MS) >=3.0, and degree of substitution (DS) >=2.0 gathers
The right high substitution value hydroxypropyl cellulose (H-HPC) between 100-300, high substitution value hydroxypropyl cellulose (H-HPC) are
A kind of good thermoplasticity natural polymer has excellent film forming, and excellent caking property, form a film very tough and tensile, glossiness
Well；In chemical inertness, hardly possible is chemically reacted with other substances；It is nontoxic without pharmacological action, to physiological harmlessness.
Preferably, the glycerol is used as polyvinyl alcohol (PVA) and is plasticized as plasticizer.
Preferably, good solvent of the ethylene glycol as hydroxypropyl cellulose (HPC) is used as solubilization, second two is not added
Alcohol, mixed solution system is unstable, and mixed solution is uniform and stable after ethylene glycol is added.
Preferably, the starch includes one of cornstarch, tapioca, is added as volume filler.
Preferably, the precipitated silica, talcum powder are added as a kind of filler in the present invention, its role is to
The effects of filling out hole filling-in is provided for paper base surface, the film surface after making coating form a film is more smooth.
Preferably, the defoaming agent is water-soluble defoaming agent.
Preferably, the water is industrial deionized water.
The invention also includes a kind of water-soluble coating materials of composite paper-plastic material that recyclable regenerative as described above utilizes
The preparation method of material, the preparation method comprise the following specific steps that:
1. being added to each component in the container with heating jacket, it is warming up to 95 DEG C under stiring, keeps the temperature under stiring
2-4 hours；
2. then stopping heating, and it is cooled to room temperature by collet cooling water；
3. continuing stirring 0.5 hour at room temperature, discharging is a kind of composite paper-plastic material that recyclable regenerative utilizes use
Water-soluble coating material.
The present invention also provides a kind of application of water-soluble coating material as described above in composite paper-plastic material, this is answered
With including that the water-soluble coating material is coated to paper base material surface by coating machine, after drying, press polish, winding i.e.
For a kind of recyclable composite paper-plastic material utilized.
The preparation method and application comparison of the present invention and current existing composite paper-plastic material has following feature and advantage: 1.
Composite coating uses water as medium completely, and any organic solvent, environmental protection, safety are not used in production；2. used coating adhesive
It is with the adhesive of paper base material is compound filmogen again；There is excellent adhesiveness with paper base material；3. with paper base
After Material cladding film forming, composite film has heat sealability, and mechanical heat-sealing bag making, effect may be implemented in the preparation packaging bag of paper material
Rate is high；4. being suitble to prepare various paperbased packaging materials, it is particularly suitable for preparing disposable such as shopping bag, non-returnable container
The packaging and consumption of the product that disappear fastly such as bag, shopping bag；5. after use can directly reclaiming papermaking, be not required to coated film point
From, because coated film thus can under hot water it is water-soluble, and the reinforcing agent that can be used as paper fiber enters paper-making process, and realization completely may be used
Recycling utilization is a kind of environmentally friendly Regenerable paper making plastic composite materials truly.
Specific embodiment
Further specific detailed description, but reality of the invention is made to technical solution of the present invention below in conjunction with specific embodiment
It applies mode and protection scope is without being limited thereto.
In following specific examples, used polyvinyl alcohol (PVA) is that the trade mark is PVA-1199, PVA-1399, PVA-
1799, one of polyvinyl alcohol of PVA-2099 or a variety of, used hydroxypropyl cellulose (HPC) are the U.S.
One of Klucel-E, Klucel-L, Klucel-J of Hercules, Inc. company production, used defoaming agent is wide
State city ten thousand holds in defoaming foam inhibitor SRXP811, SRXP812, FSXP901, FSXP902 of the production of new material Science and Technology Ltd.
One kind, used levelling agent are that Guangzhou ten thousand holds in new material Science and Technology Ltd. production LP0100, LP050A, LP050C
It is a kind of.
Embodiment 1
A kind of composite paper-plastic material water-soluble coating material that recyclable regenerative utilizes, based on parts by weight (such as it is single
Position g), including following component:
Above-mentioned each group is measured respectively, 1. each component is added in the container with heating jacket, is risen under stiring
Temperature keeps the temperature 2 hours (h) to 95 DEG C under stiring；2. then stopping heating, and it is cooled to room temperature by collet cooling water；3.
Continue to stir 0.5 hour (h) at room temperature；Discharging is a kind of water-soluble coating material of recyclable composite paper-plastic material utilized
Material.
Above-mentioned water-soluble coating material is coated to paper base material (60g/m by metering on coating machine2) surface, it does
Dry, press polish, winding are a kind of recyclable composite paper-plastic material utilized.Basic performance such as table 1.
1. embodiment of table, 1 basic performance:
From above-mentioned experimental data it is found that the recyclable composite paper-plastic material utilized of one kind prepared by embodiment 1 has had
Standby heat sealability, can carry out Machine automated bag making, and the film for being compounded in paper base material surface have hot water can be completely molten
The feature of solution.
Embodiment 2
A kind of composite paper-plastic material water-soluble coating material that recyclable regenerative utilizes, based on parts by weight, including such as
Lower component:
Above-mentioned each group is measured respectively, 1. each component is added in the container with heating jacket, is risen under stiring
Temperature keeps the temperature 4 hours (h) to 95 DEG C under stiring；2. then stopping heating, and it is cooled to room temperature by collet cooling water；3.
Continue to stir 0.5 hour (h) at room temperature；Discharging is a kind of water-soluble coating material of recyclable composite paper-plastic material utilized
Material.
Above-mentioned water-soluble coating material is coated to paper base material (80g/m by metering on coating machine2) surface, it does
Dry, press polish, winding are a kind of recyclable composite paper-plastic material utilized.Basic performance such as table 2.
2. embodiment of table, 2 basic performance:
From above-mentioned experimental data it is found that the recyclable composite paper-plastic material utilized of one kind prepared by embodiment 2 has had
Standby excellent heat sealability, can carry out Machine automated bag making, and the film for being compounded in paper base material surface have hot water can
The feature being completely dissolved.
Embodiment 3
A kind of composite paper-plastic material water-soluble coating material that recyclable regenerative utilizes, based on parts by weight, including such as
Lower component:
Above-mentioned each group is measured respectively, 1. each component is added in the container with heating jacket, is risen under stiring
Temperature keeps the temperature 3 hours (h) to 95 DEG C under stiring；2. then stopping heating, and it is cooled to room temperature by collet cooling water；3.
Continue to stir 0.5 hour (h) at room temperature；Discharging is a kind of water-soluble coating material of recyclable composite paper-plastic material utilized
Material.
Above-mentioned water-soluble coating material is coated to paper base material (45g/m by metering on coating machine2) surface, it does
Dry, press polish, winding are a kind of recyclable composite paper-plastic material utilized.Basic performance such as table 3.
3. embodiment of table, 3 basic performance:
From above-mentioned experimental data it is found that the recyclable composite paper-plastic material utilized of one kind prepared by embodiment 3 has had
Standby excellent heat sealability, can carry out Machine automated bag making, and the film for being compounded in paper base material surface have hot water can
The feature being completely dissolved.
Embodiment 4
A kind of composite paper-plastic material water-soluble coating material that recyclable regenerative utilizes, based on parts by weight, including such as
Lower component:
Above-mentioned each group is measured respectively, 1. each component is added in the container with heating jacket, is risen under stiring
Temperature keeps the temperature 4 hours (h) to 95 DEG C under stiring；2. then stopping heating, and it is cooled to room temperature by collet cooling water；3.
Continue to stir 0.5 hour (h) at room temperature；Discharging is a kind of water-soluble coating material of recyclable composite paper-plastic material utilized
Material.
Above-mentioned water-soluble coating material is coated to paper base material (35g/m by metering on coating machine2) surface, it does
Dry, press polish, winding are a kind of recyclable composite paper-plastic material utilized.Basic performance such as table 4.
4. embodiment of table, 4 basic performance:
From above-mentioned experimental data it is found that the recyclable composite paper-plastic material utilized of one kind prepared by embodiment 4 has had
Standby excellent heat sealability, can carry out Machine automated bag making, and the film for being compounded in paper base material surface have hot water can
The feature being completely dissolved.
Embodiment 5
A kind of composite paper-plastic material water-soluble coating material that recyclable regenerative utilizes, based on parts by weight, including such as
Lower component:
Above-mentioned each group is measured respectively, 1. each component is added in the container with heating jacket, is risen under stiring
Temperature keeps the temperature 4 hours (h) to 95 DEG C under stiring；2. then stopping heating, and it is cooled to room temperature by collet cooling water；3.
Continue to stir 0.5 hour (h) at room temperature；Discharging is a kind of water-soluble coating material of recyclable composite paper-plastic material utilized
Material.
Above-mentioned water-soluble coating material is coated to paper base material (125g/m by metering on coating machine2) surface, it does
Dry, press polish, winding are a kind of recyclable composite paper-plastic material utilized.Basic performance such as table 5.
5. embodiment of table, 5 basic performance:
From above-mentioned experimental data it is found that the recyclable composite paper-plastic material utilized of one kind prepared by embodiment 5 has had
Standby excellent heat sealability, can carry out Machine automated bag making, and the film for being compounded in paper base material surface have hot water can
The feature being completely dissolved.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (10)
1. a kind of composite paper-plastic material water-soluble coating material that recyclable regenerative utilizes, based on parts by weight, feature exists
In including at least following component:
2. the composite paper-plastic material water-soluble coating material that recyclable regenerative according to claim 1 utilizes, feature
It is, the polyvinyl alcohol is complete alcoholysis type polyvinyl alcohol；The degree of polymerization of the complete alcoholysis type polyvinyl alcohol be 1100~
2000, alcoholysis degree 99%.
3. the composite paper-plastic material water-soluble coating material that recyclable regenerative according to claim 1 utilizes, feature
It is, molar substitution >=3.0 of the hydroxypropyl cellulose, degree of substitution >=2.0, the degree of polymerization is between 100-300.
4. the composite paper-plastic material water-soluble coating material that recyclable regenerative according to claim 1 utilizes, feature
It is, the glycerol is used as polyvinyl alcohol and is plasticized as plasticizer.
5. the composite paper-plastic material water-soluble coating material that recyclable regenerative according to claim 1 utilizes, feature
It is, good solvent of the ethylene glycol as hydroxypropyl cellulose is mainly used as solubilization.
6. the composite paper-plastic material water-soluble coating material that recyclable regenerative according to claim 1 utilizes, feature
It is, the starch includes one of cornstarch, tapioca, is added as volume filler.
7. the composite paper-plastic material water-soluble coating material that recyclable regenerative according to claim 1 utilizes, feature
It is, the defoaming agent is water-soluble defoaming agent.
8. the composite paper-plastic material water-soluble coating material that recyclable regenerative according to claim 1 utilizes, feature
It is, the water is industrial deionized water.
9. a kind of water-soluble coating material of composite paper-plastic material that the recyclable regenerative as described in claim 1~8 is any utilizes
The preparation method of material, which is characterized in that comprise the following specific steps that:
1. each component is measured respectively, it is added in the container with heating jacket, is warming up to 95 DEG C under stiring, is stirring
Lower heat preservation 2-4 hours；
2. then stopping heating, and it is cooled to room temperature by collet cooling water；
3. continuing stirring 0.5 hour at room temperature, discharging is a kind of composite paper-plastic material that recyclable regenerative utilizes with water-soluble
Property coating material.
10. a kind of application of water-soluble coating material as described in claim 1~8 is any in composite paper-plastic material, special
Sign is, the water-soluble coating material is coated to paper base material surface by coating machine, after drying, press polish, winding
As a kind of recyclable composite paper-plastic material utilized.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811062194.2A CN109505193A (en) | 2018-09-12 | 2018-09-12 | A kind of composite paper-plastic material water-soluble coating material and preparation method thereof that recyclable regenerative utilizes |
| PCT/CN2019/105827 WO2020052676A1 (en) | 2018-09-12 | 2019-09-13 | Water-soluble coating material for recyclable paper-plastic composite material and preparation method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811062194.2A CN109505193A (en) | 2018-09-12 | 2018-09-12 | A kind of composite paper-plastic material water-soluble coating material and preparation method thereof that recyclable regenerative utilizes |
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| Publication Number | Publication Date |
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| CN109505193A true CN109505193A (en) | 2019-03-22 |
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| WO (1) | WO2020052676A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110055811A (en) * | 2019-03-27 | 2019-07-26 | 南京林业大学 | A kind of flexible packing material and preparation method thereof for printing ink |
| CN110670413A (en) * | 2019-10-25 | 2020-01-10 | 武汉红金龙印务股份有限公司 | Early-stage improvement process for improving folding resistance of base paper for cigarettes |
| CN110842403A (en) * | 2019-10-22 | 2020-02-28 | 天津理工大学 | Completely-soluble composite air bag for pipeline welding and argon filling plugging and preparation method thereof |
| CN110848499A (en) * | 2019-09-27 | 2020-02-28 | 天津理工大学 | Paper-plastic composite air bag for pipeline welding argon filling plugging and preparation method thereof |
| CN110842332A (en) * | 2019-09-27 | 2020-02-28 | 天津理工大学 | Aluminum-plastic composite air bag for pipeline welding argon filling plugging and preparation method thereof |
| WO2020052676A1 (en) * | 2018-09-12 | 2020-03-19 | 华南理工大学 | Water-soluble coating material for recyclable paper-plastic composite material and preparation method therefor |
| CN114525699A (en) * | 2022-03-09 | 2022-05-24 | 台山市晟丰新材料有限公司 | PVA coating liquid, PVA paper-plastic composite material and preparation method thereof |
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