CN112976750B - Corrugated board and preparation process thereof - Google Patents

Corrugated board and preparation process thereof Download PDF

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Publication number
CN112976750B
CN112976750B CN202110272817.4A CN202110272817A CN112976750B CN 112976750 B CN112976750 B CN 112976750B CN 202110272817 A CN202110272817 A CN 202110272817A CN 112976750 B CN112976750 B CN 112976750B
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layer
aluminum foil
corrugated
composite paper
paper
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CN202110272817.4A
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CN112976750A (en
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殷举维
代平
殷文章
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DONGGUAN CITY UNIPARK PACKING CO LTD
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DONGGUAN CITY UNIPARK PACKING CO LTD
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/12—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/002—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B29/005—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to another layer of paper or cardboard layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/08—Corrugated paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B37/1284—Application of adhesive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/16—Drying; Softening; Cleaning
    • B32B38/164—Drying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/40—Applications of laminates for particular packaging purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
    • B32B2037/243—Coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/06—Coating on the layer surface on metal layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/70—Food packaging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2565/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D2565/38—Packaging materials of special type or form
    • B65D2565/381—Details of packaging materials of special type or form

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Wrappers (AREA)

Abstract

The application relates to the technical field of corrugated paper, in particular to a corrugated board and a preparation process thereof. The corrugated board comprises a body, wherein the body comprises two layers of aluminum foil composite paper layers and at least one corrugated layer, and the aluminum foil composite paper layers are stacked on the surface of the corrugated layer; the aluminum foil composite paper layer comprises a kraft paper layer and an aluminum foil layer, and the kraft paper layer is connected with the adjacent corrugated layers; the preparation method comprises the following steps: the corrugated board is obtained through the steps of gluing, compounding and drying. The corrugated board can be used for food packaging, and the problem that the mechanical property and the food quality of the corrugated board are easily affected after the corrugated board is contacted with food with high oil content or moisture is solved; in addition, the corrugated board with high flatness and good combination can be prepared by the preparation method.

Description

Corrugated board and preparation process thereof
Technical Field
The application relates to the technical field of corrugated paper, in particular to a corrugated board and a preparation process thereof.
Background
Corrugated board is a multi-layer adhesive body, which is composed of at least one wave-shaped core paper interlayer and one layer of paper board. The corrugated case has the advantages of light weight, compression resistance, puncture resistance, tear resistance, buffering, shock resistance, easy processing and forming and the like, can be recycled, has no pollution to the environment and the like, and is considered as a preferred mode for transporting and packaging food. In addition, the corrugated board is used for protecting commodities, is convenient for storage and transportation, and also has the functions of beautifying the commodities and publicizing the commodities.
The corrugated paper board is made up by using waste paper and straw pulp through the processes of pulping, making raw paper board, mechanical processing and rolling into corrugated form, then using adhesive to adhere it on its surface with cardboard paper.
With respect to the related art among the above, the inventors consider that the following drawbacks exist: the main components of the corrugated board are kraft paper and the cardboard paper, so when the corrugated board is used for packaging food, particularly food with high oil content or moisture, the corrugated board is easy to adhere to the food after contacting with the food, and the mechanical property of the corrugated board and the quality of the food are influenced.
Disclosure of Invention
In order to solve the problem that the mechanical property and the food quality of a corrugated board are easily affected after the corrugated board is contacted with oil or food with high water content, the application provides the corrugated board and the preparation process thereof.
In a first aspect, the present application provides a corrugated board, which adopts the following technical scheme:
a corrugated board comprises a body, wherein the body comprises two layers of aluminum foil composite paper layers and at least one corrugated layer, and the aluminum foil composite paper layers are stacked on the surface of the corrugated layer; the aluminum foil composite paper layer comprises a kraft paper layer and an aluminum foil layer, and the kraft paper layer is connected with the adjacent corrugated layers.
Through adopting above-mentioned technical scheme, because the aluminium foil material has good barrier properties and protective properties, has the characteristics of impervious gas and steam, adopt aluminium foil composite paper layer to set up on the surface of flute layer for food and aluminium foil direct contact, and then during oil content or moisture in the food are difficult to permeate corrugated container board, thereby be difficult for influencing corrugated container board's mechanical properties and can effectively keep the original taste and the characteristic of food.
In addition, because the flute layer has a plurality of profile of tooth structures to constitute, have the clearance between the adjacent profile of tooth, and the aluminium foil is softer, if direct with the aluminium foil range upon range of on the flute layer, the aluminium foil is difficult to combine with the flute layer in the course of working and levels, and the aluminium foil is broken by the pressure easily, therefore, this application adopts aluminium foil and kraft paper earlier to form aluminium foil composite paper layer, let the kraft paper play the effect that supports to the aluminium foil, stack aluminium foil composite paper layer and flute layer again, obtain the flute layer that surfacing and associativity are good.
Preferably, when the number of the corrugated layers is two or more, the body further comprises a connecting layer, and the connecting layer is stacked between two adjacent corrugated layers.
Through adopting above-mentioned technical scheme, adopt two-layer and above flute layer, can improve corrugated container board's structural strength, through setting up the articulamentum for the connection between two adjacent flute layers is inseparabler.
In a second aspect, the present application provides a method for manufacturing a corrugated board, which adopts the following technical scheme:
a method for preparing corrugated paper board comprises the following steps:
a. gluing: uniformly applying an adhesive on the corrugated layer;
b. compounding: b, conveying the aluminum foil composite paper layer and the corrugated layer obtained in the step a to a conveying roller at the same operation speed for superposition to obtain composite paper B;
c. drying: and c, drying the composite paper B obtained by compounding in the step B at the drying temperature of 350-450 ℃ to obtain the corrugated board.
Through adopting above-mentioned technical scheme, through the rubber coating, compound and stoving step can realize combining aluminium foil composite paper layer and flute, obtain the corrugated container board that the surface has the aluminium foil, because aluminium foil composite paper layer is different with the coefficient of expansion of flute, when drying the composite paper B who obtains, aluminium foil composite paper layer easily contracts and produces the warpage, and then aluminium foil composite paper layer combines the back with the flute, aluminium foil composite paper layer easily produces the fold, phenomenons such as tympanic bulla, this application sets for the scope with aluminium foil composite paper layer and flute looks adaptation through drying temperature, then make the difficult fold that appears of corrugated container board that obtains through step a, B, c processing.
Preferably, the application amount of the adhesive in the step a is 10-16g/m 2 。
By adopting the technical scheme, the coating amount of the adhesive is controlled within the range, so that the adhesive strength between the aluminum foil composite paper layer and the corrugated layer can be ensured, and the influence of the adhesive on the contraction change and the mechanical property of the corrugated layer and the aluminum foil composite paper layer can be reduced.
Preferably, the running speed of the step b is 40-130m/min.
By adopting the technical scheme, the operation speed is set in the range, if the operation speed is greater than 130m/min, the aluminum foil composite paper layer and the corrugated layer are easy to be bonded, so that the bonding strength of the corrugated board is low, and if the operation speed is less than 40m/min, the aluminum foil composite paper layer and the corrugated layer are not enough in tension and easy to be wrinkled, and the processing efficiency is reduced.
Preferably, in the step b, the aluminum foil composite paper layer is preheated under high-temperature steam, and the water content of the aluminum foil composite paper layer is 9-12%.
By adopting the technical scheme, the aluminum foil composite paper layer is subjected to preheating treatment before being compounded with the corrugated layer, so that the internal stress of the aluminum foil composite paper layer can be reduced, and the wrinkles on the aluminum foil composite paper layer are reduced, so that the aluminum foil composite paper layer is compounded with the corrugated layer in a flat land preparation manner; in addition, the water content of the aluminum foil composite paper layer is controlled within the range, so that the brittleness of the aluminum foil composite paper layer can be reduced, the aluminum foil composite paper layer is not easy to crack when being processed, and the processing is not influenced by the fact that the aluminum foil composite paper layer is softened and collapsed.
Preferably, the preparation of the aluminum foil composite paper layer comprises the following steps:
a. gluing: uniformly coating an adhesive on the kraft paper layer;
b. compounding: compounding the aluminum foil layer with the kraft paper layer obtained in the step a to obtain composite paper A;
c. and (3) drying: and c, drying the composite paper A obtained by compounding in the step b at the drying temperature of 310-450 ℃ to obtain the aluminum foil composite paper layer.
Through adopting above-mentioned technical scheme, through the rubber coating, compound and stoving step can realize combining aluminium foil layer and kraft paper layer, obtain aluminium foil composite paper layer, because aluminium foil layer and kraft paper layer's coefficient of expansion is different, aluminium foil layer easily contracts and produces the warpage in the stoving in-process, and then aluminium foil layer and kraft paper layer combine the back, aluminium foil layer easily produces the fold, phenomenons such as tympanic bulla, this application is through setting for the scope with aluminium foil layer and kraft paper layer looks adaptation with stoving temperature, then through step a, b, the difficult fold that appears of the aluminium foil composite paper layer that c processed and obtained.
Preferably, in the step b, before the aluminum foil layer and the kraft paper layer are compounded, the aluminum foil layer is firstly shaped, and the specific steps are as follows: coating a shaping layer on the surface of the aluminum foil layer at 58-75 ℃.
Through adopting above-mentioned technical scheme, utilize the design layer to stereotype the aluminium foil layer, can further reduce the shrink change that the aluminium foil layer produced in the stoving process to in order to obtain the better corrugated container board of surface smoothness.
Preferably, the shaping layer is specifically paraffin in a molten state.
Through adopting above-mentioned technical scheme, coating one deck paraffin on the aluminium foil layer, can reduce the compliance of aluminium foil layer, play the effect of stereotyping to the aluminium foil layer to make the aluminium foil layer carry out the difficult fold that appears of complex in-process with the kraft paper, obtain level and smooth aluminium foil composite paper layer.
Preferably, the coating amount of the sizing layer is 0.5-1.2g/m 2 。
By adopting the technical scheme, the coating amount of the sizing layer is controlled within the range, the sizing layer can be ensured to play a sufficient sizing role on the aluminum foil layer, the performance of the aluminum foil layer is not substantially influenced, the excessive coating amount of the sizing layer can also cause obvious change to the thickness of the aluminum foil layer, and the processing of the aluminum foil layer is easily influenced.
In summary, the present application has the following beneficial effects:
1. because this application adopts aluminium foil layer and the compound facial tissue that obtains of kraft paper layer as the facial tissue of flute layer in order to obtain surfacing and the good corrugated container board of associativity, makes food and aluminium foil direct contact, and then during oil content or moisture in the food are difficult to permeate corrugated container board to be difficult for influencing corrugated container board's mechanical properties and can effectively keep the original taste and the characteristic of food.
2. This application is through setting for the scope with aluminium foil composite paper layer and flute layer looks adaptation with stoving temperature, makes then aluminium foil composite paper layer and flute layer have the advantage that the surface smoothness is high and the associativity is good through the rubber coating, compound and the corrugated container board that stoving step processing obtained.
3. The coating amount of the adhesive is controlled to be 10-16g/m 2 The adhesive strength between the aluminum foil composite paper layer and the corrugated layer can be ensured, and the shrinkage change and the mechanical property of the adhesive to the corrugated layer and the aluminum foil composite paper layer can be reduced.
Drawings
Fig. 1 is a schematic structural diagram of a corrugated board in embodiment 1 of the present application.
Description of reference numerals: 1. an aluminum foil composite paper layer; 2. a corrugated layer; 3. a connection layer; 11. an aluminum foil layer; 12. and a kraft layer.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples.
Examples
Example 1
The utility model provides a corrugated container board, refers to figure 1, includes the body, and the body includes two-layer aluminium foil composite paper layer 1 and at least one deck flute layer 2, and aluminium foil composite paper layer 1 is range upon range of the setting on flute layer 2's surface, and flute layer 2 is mingled with between two aluminium foil composite paper layer 1. The aluminum foil material has good barrier property and protective property and has the characteristic of gas and water vapor impermeability, when the corrugated board is used as food packaging, the food is in direct contact with the aluminum foil, and then oil or water in the food is not easy to permeate into the corrugated board, so that the mechanical property of the corrugated board is not easy to be influenced, and the original taste and the characteristics of the food can be effectively maintained. In addition, the composite material can also play a role in moisture prevention and heat insulation, and plays an effective protection role in food. In addition, the corrugated board can be used as an advertising board, and after the advertising related patterns are printed on the corrugated board by utilizing the characteristics of convenience in printing, painting, impressing and the like of the aluminum foil, the appearance of the advertising board can be improved by matching the characteristics of luster and strong reflection capability of the aluminum foil
Degree and publicity.
When the quantity of flute layer 2 is two-layer and more than, the body still includes connecting layer 3, and connecting layer 3 is range upon range of the setting between two adjacent flute layers 2. That is, when the number of the aluminum foil composite paper layers 1 is two, the corrugated board comprises two aluminum foil composite paper layers 1, two corrugated layers 2 and a corresponding connecting layer 3, and the connecting sequence is specifically the aluminum foil composite paper layers 1, the corrugated layers 2, the connecting layer 3, the corrugated layers 2 and the aluminum foil composite paper layers 1. When the number of the aluminum foil composite paper layers 1 is three, the corrugated board comprises two aluminum foil composite paper layers 1, three corrugated layers 2 and two corresponding connecting layers 3, and the connecting sequence specifically comprises the aluminum foil composite paper layers 1, the corrugated layers 2, the connecting layers 3, the corrugated layers 2 and the aluminum foil composite paper layers 1, and so on. In the present embodiment, the corrugated layer 2 is two layers.
The corrugated layer 2 is a corrugated paperboard formed by processing a corrugated roll, and the raw material of the corrugated paperboard can be wood pulp, chemical pulp and recycled paper stock. The tooth form of the corrugated layer 2 is UV type, the radian of the tooth form is larger than that of V type, and smaller than that of U type, the compression strength is high, the elasticity and restoring force are good, and the bonding strength is high. The tooth profile height of the corrugated layer 2 is 5mm, and the tooth profile width is 8.5mm.
The connecting layer 3 is specifically kraft paper, the thickness of which is controlled within the range of 0.1mm-0.8mm, the thickness of the connecting layer 3 is larger than the above range, so that the processing is not easy, and the thickness of the connecting layer 3 is smaller than the above range, so that the connecting layer is easy to collapse and is not beneficial to being covered and laminated on the corrugated layer 2.
In order to ensure that when the aluminum foil is laminated with the corrugated layer 2, the aluminum foil is not easy to wrinkle and the overall performance of the corrugated board is affected, in the embodiment, the aluminum foil composite paper layer 1 includes a kraft layer 12 and an aluminum foil layer 11, the kraft layer 12 is connected with the adjacent corrugated layer 2, the thickness of the kraft layer 12 is 0.05-0.15mm, and the thickness of the aluminum foil layer 11 is 0.01-0.02mm. The aluminum foil and the kraft paper are formed into the aluminum foil composite paper, the kraft paper is enabled to support the aluminum foil, and then the aluminum foil composite paper and the corrugated layer 2 are stacked, so that the corrugated layer 2 with high surface flatness and good binding performance is obtained.
Preparation example 1
An aluminum foil composite paper is prepared by the following steps:
a. gluing: uniformly coating an adhesive on the kraft paper layer 12;
b. compounding: firstly, the aluminum foil layer 11 is shaped, and the method comprises the following specific steps: coating a shaping layer, which is paraffin wax in a molten state in the embodiment, on the surface of the aluminum foil layer 11 at 58 ℃, wherein the coating amount of the shaping layer is 0.5g/m 2 . And then compounding the aluminum foil layer 11 and the kraft paper layer 12 obtained in the step a to obtain the compound paper A.
c. Drying: and c, drying the composite paper A obtained by compounding in the step b at the drying temperature of 310 ℃ to obtain the aluminum foil composite paper.
Preparation example 2
An aluminum foil composite paper is prepared by the following steps:
a. gluing: uniformly coating an adhesive on the kraft paper layer 12;
b. compounding: firstly, the aluminum foil layer 11 is shaped, and the method comprises the following specific steps: coating a shaping layer on the surface of the aluminum foil layer 11 at 75 ℃, wherein the shaping layer is paraffin wax in a molten state in the embodiment, and the coating amount of the shaping layer is 1.2g/m 2 . And then compounding the aluminum foil layer 11 and the kraft paper layer 12 obtained in the step a to obtain the composite paper A.
c. And (3) drying: and c, drying the composite paper A obtained by compounding in the step b at the drying temperature of 450 ℃ to obtain the aluminum foil composite paper.
Preparation example 3
An aluminum foil composite paper is prepared by the following steps:
a. gluing: uniformly coating an adhesive on the kraft paper layer 12;
b. compounding: firstly, the aluminum foil layer 11 is shaped, and the method comprises the following specific steps: at 65 ℃, a shaping layer is coated on the surface of the aluminum foil layer 11, in this embodiment, the shaping layer is paraffin wax in a molten state, and the coating amount of the shaping layer is 1g/m 2 . And then compounding the aluminum foil layer 11 and the kraft paper layer 12 obtained in the step a to obtain the compound paper A.
c. And (3) drying: and c, drying the composite paper A obtained by compounding in the step b at the drying temperature of 325 ℃ to obtain the aluminum foil composite paper.
Preparation example 4
An aluminum foil composite paper is prepared by the following steps:
a. gluing: uniformly coating an adhesive on the kraft paper layer 12;
b. compounding: and (b) compounding the aluminum foil layer 11 and the kraft paper layer 12 obtained in the step (a) to obtain the composite paper A.
c. Drying: and c, drying the composite paper A obtained by compounding in the step b at the drying temperature of 325 ℃ to obtain the aluminum foil composite paper.
Example 1
A corrugated board made by the steps of:
a. gluing: uniformly coating an adhesive on the corrugated layer 2; in operation, the glue applicator roll, impregnated with adhesive, contacts the crests of the flutes 2 and transfers the adhesive to the flutes 2. Wherein the adhesive application amount is 2g/m 2 。
b. Compounding: the aluminum foil composite paper obtained in preparation example 1 was preheated under high-temperature steam, and the moisture content of the aluminum foil composite paper was 9%. And (c) conveying the aluminum foil composite paper layer 1 and the corrugated layer 2 obtained in the step (a) to a conveying roller at the same running speed for superposition to obtain composite paper B. Wherein the running speed is 40m/min.
c. Drying: and c, drying the composite paper B obtained by compounding in the step B at the drying temperature of 350 ℃ to obtain the corrugated board.
Example 2
A corrugated board made by the steps of:
a. gluing: uniformly coating an adhesive on the corrugated layer 2; in operation, the glue applicator roll, impregnated with adhesive, contacts the crests of the flutes 2 and transfers the adhesive to the flutes 2. Wherein the adhesive application amount is 16g/m 2 。
b. Compounding: the aluminum foil composite paper obtained in preparation example 2 was preheated under high-temperature steam, and the moisture content of the aluminum foil composite paper was 12%. And (B) conveying the aluminum foil composite paper layer 1 and the corrugated layer 2 obtained in the step (a) to a conveying roller at the same running speed for overlapping to obtain composite paper B. Wherein the running speed is 130m/min.
c. Drying: and c, drying the composite paper B obtained by compounding in the step B at the drying temperature of 450 ℃ to obtain the corrugated board.
Example 3
A corrugated board, which is different from the corrugated board in the embodiment 1 in the coating amount in the step a, and is shown in table 1.
Example 4
A corrugated board made by the steps of:
a. gluing: uniformly coating an adhesive on the corrugated layer 2; in operation, the glue applicator roll, impregnated with adhesive, contacts the crests of the flutes 2 and transfers the adhesive to the flutes 2. Wherein the adhesive application amount is 10g/m 2 。
b. Compounding: the aluminum foil composite paper obtained in preparation example 3 was preheated under high-temperature steam, and the moisture content of the aluminum foil composite paper was 10%. And (B) conveying the aluminum foil composite paper layer 1 and the corrugated layer 2 obtained in the step (a) to a conveying roller at the same running speed for overlapping to obtain composite paper B. Wherein the running speed is 90m/min.
c. Drying: and c, drying the composite paper B obtained by compounding in the step B at the drying temperature of 400 ℃ to obtain the corrugated board.
Example 5
A corrugated cardboard differing from example 1 in that the aluminum foil composite paper prepared in preparation example 4 was used.
Comparative example
Comparative example 1
A corrugated cardboard, which is different from the corrugated cardboard of embodiment 4 in that, in the drying step c, the drying temperature is 200 ℃.
Comparative example 2
A corrugated cardboard, which is different from example 4 in that in the drying step c, the drying temperature is 500 ℃.
TABLE 1 parameters of the examples and comparative examples
Figure GDA0003839557200000071
Performance test
1. And (3) flatness testing: for the corrugated boards prepared in examples 1 to 5 and comparative examples 1 to 2, samples with the same position and size of 80mm × 80mm were taken, wrinkles and creases of 10mm or more on the aluminum foil composite paper layer of the samples were observed, the evaluation result was classified into 3 grades, and the higher the grade is, the better the flatness is, and the specific detection results are shown in table 2. The evaluation criteria are specifically: level 0: the wrinkles and creases on the aluminum foil composite paper layer of the sample sheet are more than 5; level 1: wrinkles and creases on the aluminum foil composite paper layer of the sample sheet are all between 2 and 5; and 2, stage: the wrinkles and creases on the aluminum foil composite paper layer of the sample sheet were all 1 and less.
2. Adhesive strength test: the corrugated cardboards prepared in examples 1 to 5 and comparative examples 1 to 2 were tested for adhesive strength according to GBT 6548-2011 "determination of adhesive strength of corrugated cardboards", and the specific test results are shown in table 2.
TABLE 2 test results of examples 1 to 5 and comparative examples 1 to 2
Figure GDA0003839557200000081
As can be seen from the combination of examples 1 to 5 and table 2, the corrugated board obtained by controlling the coating amount in the coating step, the traveling speed in the laminating step, and the drying temperature in the drying step can reach level 1 or more in flatness, and can reach 1000N/m or more in adhesive strength, so that the corrugated board with high flatness and good bonding performance can be obtained.
As can be seen by combining examples 1 and 3 with Table 2, in example 3 by setting the application amount to 10 to 16g/m 2 The drying temperature is controlled within the range of 350-450 ℃, and the performance of the corrugated board prepared by the method is further improved in flatness and adhesive strength.
By combining example 4 and example 5 and table 2, it can be seen that the aluminum foil composite paper used in example 4 is shaped before the compounding step, and the corrugated board prepared by the method has a better flatness grade than that of example 5, i.e. the flatness of the corrugated board is further improved.
As can be seen from the combination of example 4 and comparative examples 1 to 2, and table 2, the corrugated cardboard prepared by example 4 has high flatness and significantly improved bonding properties by controlling the drying temperature in the drying step to be in the range of 350 to 450 ℃.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims (1)

1. The corrugated paper comprises a body, wherein the body comprises two aluminum foil composite paper layers (1) and at least one corrugated layer (2), and the aluminum foil composite paper layers (1) are stacked on the surface of the corrugated layer (2); wherein, the aluminium foil composite paper layer (1) includes kraft paper layer (12) and aluminium foil layer (11), kraft paper layer (12) are connected with adjacent flute layer (2), when the quantity of flute layer (2) is two-layer and more than, the body still includes articulamentum (3), articulamentum (3) range upon range of setting between two adjacent flute layer (2), its characterized in that, the preparation method includes the following step:
a. gluing: uniformly coating an adhesive on the corrugated layer (2);
b. compounding: b, conveying the aluminum foil composite paper layer (1) and the corrugated layer (2) obtained in the step a to a conveying roller at the same running speed for overlapping to obtain composite paper B;
c. and (3) drying: drying the composite paper B obtained by compounding in the step B at the drying temperature of 350-450 ℃ to obtain a corrugated board;
the coating amount of the adhesive in the step a is 10-16g/m 2 ；
The running speed of the step b is 40-130m/min;
in the step b, the aluminum foil composite paper layer (1) is preheated under high-temperature steam, and the water content of the aluminum foil composite paper layer (1) is 9-12%;
the preparation of the aluminum foil composite paper layer (1) comprises the following steps:
a. gluing: uniformly coating an adhesive on the kraft paper layer (12);
b. compounding: compounding the aluminum foil layer (11) with the kraft layer (12) obtained in the step a to obtain composite paper A;
c. drying: drying the composite paper A obtained by compounding in the step b at the drying temperature of 310-450 ℃ to obtain an aluminum foil composite paper layer (1);
in the step b, before the aluminum foil layer (11) and the kraft paper layer (12) are compounded, the aluminum foil layer (11) is firstly shaped, and the method comprises the following specific steps: coating a shaping layer on the surface of the aluminum foil layer (11) at 58-75 ℃;
the shaping layer is specifically paraffin in a molten state;
the coating amount of the sizing layer is 0.5-1.2g/m 2 。
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CN101670690A (en) * 2009-09-28 2010-03-17 唐敏林 Method for manufacturing attapulgite preservative corrugated cardboard
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