CN105463929B - A kind of Low-gram-weight reinforced lightweight corrugated carton glue-applying technique - Google Patents
A kind of Low-gram-weight reinforced lightweight corrugated carton glue-applying technique Download PDFInfo
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- CN105463929B CN105463929B CN201510777877.6A CN201510777877A CN105463929B CN 105463929 B CN105463929 B CN 105463929B CN 201510777877 A CN201510777877 A CN 201510777877A CN 105463929 B CN105463929 B CN 105463929B
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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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
- B31F1/20—Corrugating; Corrugating combined with laminating to other layers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F251/00—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof
-
- 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
- C09J151/00—Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
- C09J151/02—Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers grafted on to polysaccharides
-
- 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
- D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
- D21H25/04—Physical treatment, e.g. heating, irradiating
-
- 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
Abstract
The invention discloses a kind of Low-gram-weight reinforced lightweight corrugated carton glue-applying technique, corrugated multilayer is bonded as corrugated board, prepare 100 grams/m of the grammes per square metre ＜ of the body paper of the corrugated case, the main pressure-bearing surface in bottom of the corrugated case is provided with fiber reinforcement, the corrugated multilayer bonding uses amylan, the preparation method of the amylan is that olefinic monomer and super fine fibrous filler are added in amidin, and under ultrasonication glue, it is 3 6% that olefinic monomer and super fine fibrous filler, which add percentage by weight, the 1.2W/cm of intensity 1 of ultrasonic wave2.The present invention had both reduced the weight of corrugated case, in turn ensure that intensity.
Description
The present patent application is a kind of point of invention and created name " Low-gram-weight reinforced lightweight corrugated carton production technology "
Case application, the November 8 2013 applying date of original application, Application No. 2013105521265.
Technical field
The present invention relates to corrugated board.
Background technology
Corrugated board (case) is although be generally acknowledged environmental protection packaging product, and it is generation that it, which is still needed to using a large amount of timber resources,
Valency.With economic development, corrugated board (case) demand is increasing, corrugated case packaging court " low grammes per square metre, high intensity, light weight
Change " direction is developed has been a main trend.Corrugated case packaging realizes that " low grammes per square metre, high intensity, lightweight " has huge economy
And social benefit.
The content of the invention
The technical problems to be solved by the invention are just to provide a kind of corrugated case glue-applying technique, realize " low grammes per square metre, high-strength
Degree, lightweight ".
In order to solve the above technical problems, the present invention is adopted the following technical scheme that：A kind of Low-gram-weight reinforced lightweight corrugation
Carton glue-applying technique, corrugated board is bonded as by corrugated multilayer, prepares 100 grams of the grammes per square metre ＜ of the body paper of the corrugated case/flat
Square rice, the main pressure-bearing surface in bottom of the corrugated case is provided with fiber reinforcement, and the corrugated multilayer bonding uses amylan,
The preparation method of the amylan is that olefinic monomer and super fine fibrous filler are added in amidin, and in ultrasonication
It is 3-6%, the intensity 1--1.2W/cm of ultrasonic wave that lower glue, olefinic monomer and super fine fibrous filler, which add percentage by weight,2。
It is preferred that, prepare and Nano filling is added with body paper used by the corrugated paper carton, the Nano filling uses nanometer
TiO2With the compound that TPO is parent, the wherein part by weight of Nano filling each component is TiO220-50%, polyolefin
Class is the compound 50-80% of parent, and the addition of the Nano filling is the 2-8% of body paper weight.
It is preferred that, the body paper water content control is 10%.
It is preferred that, the Process of Applying Glue in corrugated multilayer adhesion step, the pressure between Corrugator roller and pressure roll is
0.3Mpa~0.4Mpa.
It is preferred that, the Process of Applying Glue in corrugated multilayer adhesion step, 1mm~1.5mm of the coating area at the stupefied peak of corrugation is wide
Within degree.
It is preferred that, the Process of Applying Glue in corrugated multilayer adhesion step, using laser adjust automatically gluing anilox roll with watt
Gap between stupefied roller.
It is preferred that, the fiber reinforcement is the composite polypropylene fiber on main pressure-bearing surface in length and breadth direction.
The present invention is to use the 100 grams/m low gram weight and high strength degree fluting mediums of ＜ first, next to that in corrugated case
The main pressure-bearing surface in bottom sets fiber reinforcement, so both reduces weight, in turn ensure that intensity.
In addition, present invention employs micropore directly-heated type dry technology, the technology is on existing heat radiation dry technology basis
On innovated, i.e., a large amount of micropores are provided with the heat radiation plate of production line, are ejected at a high speed by these micropores a large amount of
Superheated steam.Superheated steam is acted on by the paper fiber capillary siphoning in corrugated board, rapidly, is delivered evenly to cardboard
Up and down, quick volume drying is carried out to corrugated board；Then and then to cardboard again by the negative pressure high speed exhaust of strength, again
Acted on by paper fiber capillary siphoning, moisture and waste heat excessive in cardboard are taken away rapidly, reach cooling and control moisture
Purpose, while by a large amount of heat recovery.
Embodiment
The present invention is made with reference to specific embodiment and being illustrated.
A kind of Low-gram-weight reinforced lightweight corrugated carton production technology, including corrugated multilayer be bonded as corrugated board,
Corrugated board drying, corrugated board are dried and the shaping of corrugated case this four steps, prepare gram of the body paper of the corrugated case
100 grams/m of weight ＜, the main pressure-bearing surface in bottom of the corrugated case is provided with fiber reinforcement.Prepare the corrugated paper carton
Nano filling is added with body paper used, the Nano filling uses nano-TiO2With TPO be parent compound, its
The part by weight of middle Nano filling each component is TiO220-50%, TPO for parent compound 50-80%, it is described to receive
The addition of rice filler is the 2-8% of body paper weight.The body paper water content control is 10%.The corrugated multilayer bonding makes
With amylan, the preparation method of the amylan is that olefinic monomer and super fine fibrous filler are added in amidin, and
It is 3-6%, the intensity of ultrasonic wave that glue under ultrasonication, olefinic monomer and super fine fibrous filler, which add percentage by weight,
1--1.2W/cm2.Process of Applying Glue in corrugated multilayer adhesion step, pressure between Corrugator roller and pressure roll for 0.3Mpa~
0.4Mpa.Process of Applying Glue in corrugated multilayer adhesion step, coating area is within 1mm~1.5mm width at the stupefied peak of corrugation.It is many
Process of Applying Glue in layer corrugated paper adhesion step, using the gap between laser adjust automatically gluing anilox roll and Corrugator roller.Institute
Stating the drying unit used in corrugated board baking step includes the heat radiation plate below corrugated board pipeline, the heat
Radiant panel is provided with below micropore, the heat radiation plate and is provided with steam injection equipment.Used in the corrugated board drying steps
Negative pressure exhaust apparatus takes away moisture content and waste heat excessive in cardboard.The fiber reinforcement is in main pressure-bearing surface direction in length and breadth
On composite polypropylene fiber.
Corrugated case is made up of corrugated board, and corrugated board is made up of fluting medium again.In general by heavier corrugation
The corrugated case intensity that the more corrugated board of body paper, the number of plies is constituted is higher, meets use requirement；On the contrary, lighter corrugation is former
The corrugated case intensity that the less corrugated board of paper, the number of plies is constituted is relatively low, less meets use requirement.As can be seen here, corrugated paper
Constitute contradictory relation between case body paper grammes per square metre, the number of plies and intensity, thus the corrugated case typically used by 120-150 grams/it is flat
Square rice fluting medium, three layers of-five layers of composition, based on five layers.But this does not meet the low grammes per square metre advocated, high intensity, lightization amount
Spirit.Corrugated case is accomplished low grammes per square metre, high intensity, lightweight, meet use requirement, be critical to rationally resolve corrugated paper
Contradictory relation between case body paper grammes per square metre, the number of plies and intensity.Solve the contradictory relation chief technology be fluting medium and watt
Corrugated paper board quality, into box technology and structure.
● fluting medium quality：
High-quality fluting medium should be selected, that is, requires that fiber bonding strength is good, paper is smooth, has preferable tightness and endures
Degree, it is desirable to have certain elasticity, to ensure that the carton being made has shockproof and voltage endurance capability.In addition moisture content index to be controlled
System, moisture is too small, and paper is crisp, and corrugation can rupture when processing；Moisture is excessive, and paper is soft, can bring difficulty to machine-shaping.Typically
The water content of paper should control to be advisable 10% or so.
● quality of corrugated：
Packed in current corrugated case under the trend developed towards " low grammes per square metre, high intensity, lightweight " direction, to corrugated board
Quality propose requirements at the higher level.How the quality of corrugated board is improvedFor identical fluting medium, using advanced gluing
Agent and application techniques are crucial.
● into box technology and structure：
There is substantial connection into box technology and structure and corrugated case intensity, especially with carton compression intensity, pile intensity, anti-
Compressive Strength has compared with Important Relations.In order that corrugated case accomplishes low grammes per square metre, high intensity, lightweight, meet use requirement, it is necessary to have elder generation
Enter into box technology, scientific and reasonable body structure.
The present invention has made following tripartite's surface technology wound for low grammes per square metre, high intensity, the key technology of lightweight corrugated case
Newly：
(1) low gram weight and high strength degree fluting medium technological innovation
High-quality fluting medium is to realize that the low grammes per square metre of corrugated case, high intensity, lightweight are crucial.Existing fluting medium
Substantially formed by waste paper by traditional paper technology regeneration, paperFiberShort, adhesion is weak, so intensity difference is caused,TightnessWithDeflectionLow, cockling is whole, it is impossible to produce the fluting medium of low gram weight and high strength degree, and then can not also accomplish low gram of corrugated case
Weight, high intensity, lightweight.Low gram weight and high strength degree fluting medium is carried out therefore, the present invention combines with fluting medium supplier and has ground
Study carefully exploitation, realize polymer base inorganic nano filler-paperFiberCombination technology is innovated, and fluting medium is reached low gram weight and high strength
Degree.
Inventive polymers base inorganic nano filler uses nano-TiO2With TPO compound.In paper making wet part production
The Nano filling is added in flow, under strong mechanical mixture, lacks near because the surface atom on the Nano filling particle encloses
The atom of neighbour's coordination and high surface energy, make it have very high activity, extremely unstable, are easily combined with other atoms；And
And, the activity of surface atom can also cause the change of surface electronic spin conformation and electron spectrum, so as to nano-particle with low
The characteristics such as density, low flow rate, high inspiratory, high mixing.On Nano filling surface and boundary under effect, Nano filling is set to exist
The poly- component of tiny wadding is formed around paper fiber, improves slurry tissues structure, strengthens the close connection between paper fiber, increases fiber
Between pulling force, and fill and lead up uneven defect between fiber, by paper-making process, acquisition has stronger tightness, and surfacing is smooth,
Evenness preferably fluting medium.With having because the Nano filling is added, the loss of paper fiber is reduced, paper machine operation shape is improved
Condition, improves speed of production, reduces production of fluting base paper cost.
Using polyolefin composite Ti O2Nano filling technology papermaking, this is a big innovation on fluting medium paper technology,
Just due to this innovative technology application, the 100 grams/m low gram weight and high strength degree fluting mediums of ＜ are successfully fabricated out, it is ensured that
New product of the present invention is implemented to succeed.
(2) adhesive and application techniques innovation：
Corrugated board is bonded by fluting medium, and bonding is the high-quality corrugated board key technology of production, and gluing
Agent and application techniques are the high-quality fluting medium bonding most important thing again.
● adhesive technology is innovated：
Corrugated board production is often amylan with adhesive.Because starch molecular structure has very strong cohesive force in itself,
Particle is smaller, and hydrone is difficult to penetrate into, and certain degree must be expanded into through gelatinization, viscosity, therefore high-quality adhesive can be just produced
Need modified.Present invention employs starch-polymer-ultra-fine filling material ternary enhancing modification technology.Select caking property good first
Starch, olefinic monomer and super fine fibrous filler, and the glue under ultrasonication are added in amidin.Due to forming sediment
Powder particles are produced a certain degree of degraded under different directions vibration at high speed and mechanical shearing effect, broken by ul-trasonic irradiation
The grain structure and crystal structure of starch are broken, making the viscosity of system increases, form netted starch-high-polymer molecular chain, improved
Adhesive strength and stability；Meanwhile, the super fine fibrous filler in amylan is effectively distributed in the capillary porosity on paper surface,
Improve the impact strength of cardboard.In addition, each parameter number of the present invention during glue to influence adhesive quality
Wordization is matched, and implements the full-automatic state modulator of glue, it is ensured that high-quality adhesive is produced.
● application techniques are innovated：
Application techniques influence very big on quality of corrugated, and wherein the adjustment of glue spreader and glue-spread, pressure, temperature are to apply
Major influence factors during glue.
1. the gap between laser adjust automatically gluing anilox roll and Corrugator roller.
Gap too conference between gluing anilox roll and Corrugator roller makes gluing bad and causes local foaming and Poor cohesion,
Gap is too small to be made two roller frictions and damage gluing anilox roll, caused the consequence that can not remedy and can not normally be produced.Therefore exist
The two gap of adjustment is particularly significant.Present invention employs the gap between laser adjust automatically gluing anilox roll and Corrugator roller, make
Its except two must unanimously in addition to, can more control the appropriate clearance between two rollers.
2. determined by glue-spread and bonding intensity quantitative relationship, automatically control glue-spread.
Blindly increase glue-spread due to worrying reduction glue-spread that viscous platform can be caused bad, this method perhaps can be carried
High bonding intensity, but many unnecessary quality drawbacks just show especially out, such as surface washboard, cock skin shape, thoroughly stupefied, cardboard it is inclined
Many drawbacks such as soft, intensity is poor, thinner thickness, the consequence of generation is exactly high cost low quality.Therefore glue-spread pair is controlled
Improve quality of corrugated and intensity effect is very big.The present invention is determined by glue-spread and bonding intensity quantitative relationship, is realized and is applied
Glue amount accurately automatically controls, it is to avoid glue-spread is erratic.Meanwhile, strict control coating area the stupefied peak of corrugation 1mm~
Within 1.5mm width.
3. fluting medium quality settings pressure alarm is regarded.
The whole production process of corrugated board is inseparable with pressure, and compacting corrugation needs pressure, viscous between paper and paper
The cooperation that conjunction is also required to pressure could be completed.So, suitable pressure is the important guarantee for manufacturing high-quality corrugated board.
Pass through present invention research and development, it is believed that the pressure between Corrugator roller and pressure roll should be flexible regarding the quality of body paper
Control, the good body paper elasticity of grade is more close, and adhesive is more difficult after gluing penetrates into the fiber of paper, so pressure should
It is big；And the intensity of inferior grade body paper is poor, if pressure crosses the fiber of conference damage paper or even breaks letterweight.According to of the invention real
The low gram weight and high strength degree fluting medium that border is used, we are provided with the pressure alarm system between 0.3Mpa~0.4Mpa, are less than
0.3Mpa and higher than 0.4Mpa meetings and alarm, and it is automatically adjusted to 0.3Mpa~0.4Mpa.
4. micropore directly-heated type dry technology.
It is highly important production technology that corrugated board, which is dried, passes through drying control moisture of paper board, reinforcing bonding intensity, complete
Into cardboard forming.Existing corrugated board production is subject to drying generally by heat radiation effect.Present invention employs micropore directly-heated
Formula dry technology is innovated.The technology is innovated on the basis of existing heat radiation dry technology, i.e. the hot spoke in production line
Penetrate and a large amount of micropores are provided with plate, substantial amounts of superheated vapor is ejected at a high speed by these micropores.Superheated vapor passes through corrugated paper
Paper fiber capillary siphoning effect in plate, rapidly, is delivered evenly to above and below cardboard, corrugated board is carried out quick overall dry
It is dry；Then and then to cardboard again by the negative pressure high speed exhaust of strength, acted on again by paper fiber capillary siphoning, by paper
Excessive moisture content and waste heat are taken away rapidly in plate, cooling and control moisture purpose are reached, while by a large amount of heat recovery.Adopt
Produce corrugated board with the innovation dry technology, with bonding intensity is strong, product quality is high, energy-conservation the features such as.
(3) local compound and fiber strengthens the application of innovative technology.
General corrugated case has six faces, and traditional six faces of corrugated case are the corrugated paper of the identical number of plies and thickness
Plate is constituted.Product of the present invention finds the stress in each face by the analysis to corrugated case each face stress during packaging use
Different, the face increase grammes per square metre small to stress and the number of plies are exactly a kind of function waste.The present invention due to use low grammes per square metre body paper,
The loss of strength that can be caused, by each face force analysis of corrugated case, reaches that structure design is innovated, i.e., will for each face stress
Ask, reasonable design goes out the composition in each face of corrugated case, on the basis for ensuring intensity, to reach lightweight purpose.The present invention exists
In structure innovation, take local compound and fiber reinforcement innovative technology and made up.I.e. to the main pressure-bearing surface of corrugated case
Carry out after being combined, then carry out fiber reinforcement.Concrete technology route is first cut coil paper by carton specification, with each layer of adhesive
Drying is local compound into corrugated paper board production line progress after compound, and fiber reinforcement is then carried out again.
2.6 the key technical indexes：
1st, fluting medium grammes per square metre：100 grams/m of ＜；
2nd, pop strength：≥1500Kpa；
3rd, Punctured Strength：≥30J；
4th, side pressure strength：≥7500N/m；
5th, empty van bearing strength：≥5000N.
Claims (1)
1. a kind of Low-gram-weight reinforced lightweight corrugated carton glue-applying technique, corrugated board is bonded as by corrugated multilayer, it is special
Levy and be：100 grams/m of the grammes per square metre ＜ of the body paper of the corrugated case is prepared, the main pressure-bearing surface in bottom of the corrugated case is set
There is fiber reinforcement, the corrugated multilayer bonding uses amylan, and the preparation method of the amylan is in amidin
Middle addition olefinic monomer and super fine fibrous filler, and the glue under ultrasonication, olefinic monomer and super fine fibrous filler
Addition percentage by weight is 3-6%, the intensity 1--1.2W/cm of ultrasonic wave2, prepare and be added with body paper used by the corrugated paper carton
Nano filling, the Nano filling uses nano-TiO2With the compound that TPO is parent, wherein Nano filling each component
Part by weight be TiO220-50%, TPO are the compound 50-80% of parent, and the addition of the Nano filling is original
The 2-8% of paper weight, Process of Applying Glue of the body paper water content control in 10%, corrugated multilayer adhesion step, Corrugator roller with
Pressure between pressure roll is the Process of Applying Glue in 0.3MPa~0.4MPa, corrugated multilayer adhesion step, and coating area is in corrugation
Within 1mm~1.5mm width at stupefied peak, the Process of Applying Glue in corrugated multilayer adhesion step, using laser adjust automatically gluing
Gap between anilox roll and Corrugator roller, the fiber reinforcement is fine for the composite polypropylene on main pressure-bearing surface in length and breadth direction
Dimension.
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| CN201510777877.6A CN105463929B (en) | 2013-11-08 | 2013-11-08 | A kind of Low-gram-weight reinforced lightweight corrugated carton glue-applying technique |
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| CN201310552126.5A CN103640251B (en) | 2013-11-08 | 2013-11-08 | A kind of low grammes per square metre reinforced light quantizes corrugated case production technology |
| CN201510777877.6A CN105463929B (en) | 2013-11-08 | 2013-11-08 | A kind of Low-gram-weight reinforced lightweight corrugated carton glue-applying technique |
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| CN201510777340.XA Active CN105442386B (en) | 2013-11-08 | 2013-11-08 | A kind of Low-gram-weight reinforced lightweight corrugated carton |
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| CN106346833B (en) * | 2016-08-30 | 2019-11-05 | 常传泉 | A kind of gluing lock is latched at case and its carton is at case method |
| CN106626709B (en) * | 2016-12-30 | 2020-10-02 | 湖南圣人防水材料有限公司 | Water-resistant corrugated paper production process and production line thereof |
| CN107175846A (en) * | 2017-06-09 | 2017-09-19 | 福建利树股份有限公司 | A kind of Low-gram-weight reinforced lightweight corrugated carton production technology |
| CN109537349A (en) * | 2018-12-04 | 2019-03-29 | 常州市正文印刷有限公司 | A kind of production technology of Low-gram-weight high-strength corrugated case |
| CN109649828A (en) * | 2018-12-04 | 2019-04-19 | 常州市正文印刷有限公司 | A kind of manufacture craft of high-strength corrugated case |
| CN110561827A (en) * | 2019-09-04 | 2019-12-13 | 云南瑞升纸业有限公司 | Corrugated carton with high compressive strength and preparation process thereof |
| CN112175554A (en) * | 2020-11-19 | 2021-01-05 | 马鞍山市康辉纸箱纸品有限公司 | Preparation method of corrugated paper adhesive |
| CN115418886A (en) * | 2022-09-01 | 2022-12-02 | 青岛海王纸业股份有限公司 | Processing technology of lightweight corrugated carton |
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| CN102191726B (en) * | 2011-03-31 | 2013-04-10 | 广东理文造纸有限公司 | Process for preparing low-basis-weight corrugated paper |
| CN202765406U (en) * | 2012-03-27 | 2013-03-06 | 江苏大和新材料有限公司 | Waterproof and pressure resistant packaging carton |
| CN103225227A (en) * | 2013-04-15 | 2013-07-31 | 江苏大和新材料有限公司 | Processing technique for high-strength corrugated board |
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2013
- 2013-11-08 CN CN201310552126.5A patent/CN103640251B/en active Active
- 2013-11-08 CN CN201510777340.XA patent/CN105442386B/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| CN105463929A (en) | 2016-04-06 |
| CN103640251A (en) | 2014-03-19 |
| CN105442386A (en) | 2016-03-30 |
| CN103640251B (en) | 2016-01-20 |
| CN105442386B (en) | 2017-08-29 |
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