CN107905020B - Composite corrugated board and processing method thereof - Google Patents
Composite corrugated board and processing method thereof Download PDFInfo
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- CN107905020B CN107905020B CN201711305357.0A CN201711305357A CN107905020B CN 107905020 B CN107905020 B CN 107905020B CN 201711305357 A CN201711305357 A CN 201711305357A CN 107905020 B CN107905020 B CN 107905020B
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
- D21F11/12—Making corrugated paper or board
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- 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
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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
- 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
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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
- B32B29/08—Corrugated paper or cardboard
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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
- 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
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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
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/16—Drying; Softening; Cleaning
- B32B38/164—Drying
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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
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/30—Multi-ply
- D21H27/40—Multi-ply at least one of the sheets being non-planar, e.g. crêped
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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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/558—Impact strength, toughness
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/716—Degradable
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/732—Dimensional properties
- B32B2307/734—Dimensional stability
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Paper (AREA)
- Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
Abstract
The invention discloses a composite corrugated board and a processing method thereof, belonging to the technical field of corrugated board processing, and the technical key points are as follows: the utility model provides a composite corrugated board, includes surface paper layer, corrugated core layer and interior paper layer, corrugated core layer includes the continuous wavy flute scraps of paper of a plurality of rows, be equipped with two piece at least enhancement cardboards between surface paper layer and the interior paper layer, enhancement cardboard one side is connected in surface paper layer, the opposite side is connected in interior paper layer, the flute scraps of paper fill by the enhancement cardboard, the enhancement cardboard is facing paper layer, enhancement cardboard and interior paper layer or enhancement cardboard, in the cavity that surface paper layer and interior paper layer constitute, and bond mutually with the cavity inner wall. The process comprises the steps of raw material pretreatment, fiber separation, stirring and pulping, net surfing, forming and dehydration, papermaking, corrugated roller rolling, composite pasting, cooling and shaping, slitting, indentation, transverse cutting and stacking, and then the forming can be carried out. The invention has better support strength, deformation resistance and shock resistance; the processing method adds plant fiber, improves the degradability of the plant fiber and is environment-friendly.
Description
Technical Field
The invention belongs to the technical field of corrugated board processing, and particularly relates to a composite corrugated board and a processing method thereof.
Background
The corrugated board as the most important and widely used packing material has the advantages of light weight, low cost, easy processing, convenient storage and transportation, etc., which are not possessed by wood packing and metal packing, and the corrugated structure of U, V, UV, etc. also greatly improves the compression resistance and the rupture resistance of the carton. It has high mechanical strength, can resist collision and falling in the process of transportation, and is a necessary material for modern packaging.
Corrugated paper of corrugated paper boards in the prior art is mostly transversely arranged in a corrugated core layer in a wavy manner, the strength of the paper board structure of the corrugated paper board structure is poor, the corrugated paper boards are often deformed due to compression in the use process, different impacts in the carrying process cannot be adapted, the inner layer of the corrugated paper board cannot work or even is damaged easily, and the safety of packaged objects is influenced. Therefore, a new technical solution is needed to solve the above problems.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a composite corrugated board which has good deformation resistance and impact resistance and prolongs the service life of the composite corrugated board.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a composite corrugated board, includes surface paper layer, corrugated core layer and interior paper layer, interior paper layer and surface paper layer are located the inside and outside of corrugated core layer respectively, corrugated core layer includes that a plurality of rows of continuous wave shape's corrugated scraps of paper constitute, be equipped with two piece at least reinforced paper boards, every between surface paper layer and the interior paper layer one side fixed connection of reinforced paper board is on surface paper layer, and its opposite side fixed connection is on interior paper layer, corrugated scraps of paper fill by reinforced paper board and surface paper layer reinforced paper board and interior paper layer perhaps in the cavity that reinforced paper board, surface paper layer and interior paper layer constitute, and with the cavity inner wall bonds mutually.
By adopting the technical scheme, the reinforced paper board is added in the composite corrugated paper board, so that on one hand, the thickness of the corrugated paper board is increased, and the integral hardness of the composite corrugated paper board is increased; on the other hand, the two sides of the corrugated paper sheet are respectively connected to the inner paper layer and the surface paper layer, and the corrugated paper sheet also plays a role in supporting the inner paper layer and the surface paper layer. Therefore, the deformation resistance and the impact resistance of the composite corrugated board are improved, the service life of the composite corrugated board is prolonged, and the corrugated board is firmer and more durable.
The invention is further configured to: and a support structure with a continuous semicircular or semi-elliptical section is formed between each row of corrugated paper sheets and the surface paper layer or the inner paper layer.
Through adopting above-mentioned technical scheme, above-mentioned corrugated paper piece is bent into continuous semi-circular or semiellipse shape, and the circular arc shape of constantly bending this moment has not only increased the thickness of corrugated paper, and a plurality of semi-circular or semiellipse arc column structures have good shock-absorbing capacity simultaneously, can effectively reduce the probability that the cavity warp between interior paper layer and the surface paper layer to above-mentioned composite corrugated container board's firmness and incorruptibility have been improved.
The invention is further configured to: and an alternate semi-conical supporting structure is formed between each row of corrugated paper sheets and the surface paper layer or the inner paper layer.
Through adopting above-mentioned technical scheme, above-mentioned corrugated paper piece is bent into alternate semicircle cone structure, and the curved surface of semicone this moment has certain buffer performance, can effectively reduce the probability that the cavity warp between interior paper layer and the surface paper layer to above-mentioned composite corrugated container board's firmness and incorruptibility have been improved.
The invention is further configured to: at least two reinforcing paper boards which are arranged in a cross mode are arranged between the surface paper layer and the inner paper layer.
By adopting the technical scheme, an operator sets the two reinforcing paper boards in a crossed manner, and the cavity formed by the reinforcing paper boards, the inner paper layer and the surface paper layer is in a triangular shape, so that corrugated paper filled in the triangular cavity is required to be in a wave shape with different bending radiuses. Therefore, the corrugated paper can keep better strength and also has better deformation resistance and impact resistance.
The invention is further configured to: the reinforced paper board and the surface paper layer, the reinforced paper board and the inner paper layer, and the corrugated paper sheets and the reinforced paper board, the surface paper layer and the inner paper layer are fixed by adopting paper-plastic adhesives.
Through adopting above-mentioned technical scheme, utilize the paper to mould the adhesive and bond fixedly on to above-mentioned corrugated paper, improved above-mentioned bearing structure's shock-absorbing capacity, can effectively reduced the probability that the cavity warp between interior paper layer and the face paper layer to above-mentioned composite corrugated container board's firmness and incorruptibility have been improved.
The invention is further configured to: the paper-plastic adhesive is a vinyl acetate-butyl acrylate copolymer emulsion adhesive.
By adopting the technical scheme, the vinyl acetate-butyl acrylate copolymer emulsion adhesive is prepared by adopting butyl acrylate, polyvinyl alcohol, vinyl acetate, an anionic emulsifier, starch, distilled water, a crosslinking agent (ethylene glycol dimethacrylate) and ammonium persulfate as raw materials. And the emulsion type adhesive is adopted to replace the traditional solvent type adhesive, so that the problems of serious pollution and toxicity, flammability and explosiveness, and inconvenient storage and transportation caused by a large amount of solvent (such as toluene, gasoline or ethyl acetate) volatilized into the air in the use process of the solvent type composite adhesive film can be effectively reduced. The vinyl acetate-butyl acrylate copolymer emulsion adhesive is more green, safe and pollution-free when an operator uses the vinyl acetate-butyl acrylate copolymer emulsion adhesive, and meanwhile, the vinyl acetate-butyl acrylate copolymer emulsion adhesive also has the advantages of low cost, convenience in use and excellent performance.
The invention is further configured to: the paper-plastic adhesive is LF high-strength quick-drying starch glue.
By adopting the technical scheme, when the LF high-strength quick-drying starch adhesive is used instead of an organic adhesive, the use cost is greatly reduced, the market competitiveness of enterprises is improved, and meanwhile, the LF high-strength quick-drying starch adhesive also has the advantages of large binding power, high drying speed, good storage stability, energy conservation and environmental friendliness.
Aiming at the defects in the prior art, the invention aims to provide a processing method of a composite corrugated board, which has the advantages of reasonable process and simple and convenient operation, and can improve the ring crush strength and the deformation resistance of the composite corrugated board.
In order to achieve the purpose, the invention provides the following technical scheme: a processing method of composite corrugated board comprises the following steps,
step S1, pretreatment of raw materials: manually refining and impurity removing the waste paper products; pulverizing the waste paper product after removing impurities into 1-4 cm2Small pieces of (2);
step S2, defibration: placing the crushed small blocks in a storage bin, and alternately spraying water and a mixed solution of a urea-formaldehyde resin adhesive, paraffin and guanidine phosphate serving as a papermaking chemical additive in sequence until the surfaces of the small waste paper products are wetted; then, carrying out fiber separation treatment by a separator, filtering and washing by clear water for three times to obtain mixed raw stock;
step S3, stirring and pulping: concentrating the mixed raw stock obtained in the step S2 by a cylinder thickener; then grinding and pulping the mixed primary pulp in a medium-concentration hydraulic disc grinder, and controlling the concentration of paper pulp to be 6-12%; adding plant long fibers into the paper pulp, and stirring and mixing for 5-10 minutes under ultrasonic waves to obtain slurry;
step S4, net feeding and forming dehydration: after the pulp obtained in the step S3 is sprayed out through an air cushion type head box of a paper machine, the pulp is dehydrated and formed from a printing point, the flow speed of the pulp is controlled to be 1.5-2 m/S, and the ratio of the pulp speed to the wire speed is controlled to be 1: 0.85-0.95;
step S5, paper making: making the pulp prepared in the step S4 into paper on a corrugated medium paper machine; then spraying the papermaking chemical auxiliary agent; then, carrying out large-roll-diameter pressing and wide-pressing area pressing and drying treatment, controlling the temperature of a drying cylinder at 90-150 ℃, drying until the moisture on the paper surface is 6-12%, and reeling to obtain the corrugated base paper;
step S6, rolling by a corrugating roller: rolling the corrugated medium obtained in the step S5 into corrugated paper sheets in a wave shape by a corrugating roller;
step S7, compound pasting: feeding corrugated paper sheets, reinforced paper boards and corrugated base paper to a gluing roller for gluing and drying treatment, wherein the gluing amount is 8-10 g/m2The bonding temperature is 58 ℃; the drying temperature is 150 ℃, and the drying speed is 98 m/min to form corrugated paperA plate;
step S8, cooling and shaping: cooling and shaping the corrugated board prepared in the step S7, wherein the cooling and shaping temperature is 15 ℃, and the cooling and shaping time is 5-8 seconds;
and S9, slitting, creasing, transversely cutting and stacking.
By adopting the technical scheme, after the waste paper products are subjected to the refining and impurity removal treatment, the overall quality and the mechanical strength of the composite corrugated board manufactured in the later period are improved; plant long fibers are added in the pulping process, the ring crush strength of the corrugated paper can be improved, impurities on the surfaces of the fibers can be further removed after ultrasonic treatment is carried out on the corrugated paper, and the effects of removing the impurities can be achieved after filtering and washing. Then pulping, net-surfing papermaking and drying to obtain corrugated base paper; the corrugated paper is rolled by a corrugated roller, compounded and pasted, cooled and shaped, cut, impressed, transversely cut and stacked to obtain the composite corrugated board.
The invention is further configured to: the plant long fiber added in step S3 is one or a combination of two or more of softwood long fiber, ramie fiber, and coconut fiber.
By adopting the technical scheme, the plant long fibers are used as the surface modifier of the corrugated paper, so that the ring crush strength of the corrugated paper can be effectively improved, and the composite corrugated board has good deformation resistance and impact resistance. In addition, the plant fibers are all pure natural plant fibers and have good degradability, so that the environment protection is improved, and the degradability of the composite corrugated board is improved.
In conclusion, the invention has the following beneficial effects:
1. the composite corrugated board has good deformation resistance and impact resistance;
2. the supporting strength can be improved by arranging the reinforcing paper board, so that the composite corrugated paper board can be firmer and more durable, and the service life of the composite corrugated paper board is prolonged;
3. the processing method is simple and convenient to operate, the process is reasonable, and the pure natural plant cellulose is used as the surface modifier of the corrugated paper, so that the corrugated paper has good degradability and the environment is protected.
Drawings
FIG. 1 is a perspective view of the present embodiment 1;
FIG. 2 is a front view of the present embodiment 1;
fig. 3 is a perspective view of the corrugated medium layer and the inner paper layer in the embodiment 2;
FIG. 4 is a process flow diagram of this example 1.
Description of the drawings: 1. a face paper layer; 2. a corrugated core layer; 21. corrugated paper sheets; 3. an inner paper layer; 4. a reinforced paperboard; 5. a cavity; 6. a support structure.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and examples.
In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
Example 1: a composite corrugated cardboard, as shown in fig. 1 and 2, which comprises a surface paper layer 1, a corrugated core layer 2 and an inner paper layer 3 from outside to inside in sequence, wherein the inner paper layer 3 and the surface paper layer 1 are respectively positioned at the inside and outside of the corrugated core layer 2. The corrugated medium layer 2 includes a plurality of rows of corrugated paper sheets 21 in a continuous wave shape, and the inner paper layer 3 and the face paper layer 1 are corrugated base paper. The continuous corrugated paper sheet 21 can increase the mechanical strength of the composite corrugated cardboard, can resist collision and falling during transportation, and is one of the necessary materials for modern packaging.
As shown in fig. 1 and 2, in order to enhance the structural strength of the composite corrugated board and improve the deformation resistance thereof, two crossed reinforcing paper boards 4 are arranged between the face paper layer 1 and the inner paper layer 3, the reinforcing paper boards 4 are corrugated base paper, the central parts of the two crossed reinforcing paper boards 4 are both provided with grooves (not shown in the figure), and the two reinforcing paper boards 4 are inserted into each other for forming. And one side of each reinforcing paperboard 4 is bonded to the face paper layer 1 and the other side thereof is bonded to the inner paper layer 3.
As shown in fig. 1 and 2, the corrugated paper sheets 21 in a wavy line shape are filled in the cavity 5 formed by the reinforcing paper sheet 4, the reinforcing paper sheet 4 and the face paper layer 1, the reinforcing paper sheet 4 and the inner paper layer 3, or the reinforcing paper sheet 4, the face paper layer 1 and the inner paper layer 3, and the corrugated paper sheets 21 can be adhered to the inner wall of the cavity 5. Meanwhile, the corrugated paper sheets 21 can form a support structure 6 with a continuous semicircular or semi-elliptical cross section between the surface paper layer 1 and the inner paper layer 3. Above-mentioned bearing structure 6 is the circular arc shape of continuous bending, not only can increase the thickness of corrugated paper, still has good shock-absorbing capacity, can effectively reduce the probability that cavity 5 warp between interior paper layer 3 and the face paper layer 1 to above-mentioned compound corrugated container board's firmness and durable degree have been improved.
As shown in fig. 1 and 2, since the cross section of the cavity 5 formed by the reinforcing paper sheet 4, the inner paper sheet 3 and the face paper sheet 1 is triangular, the corrugated paper sheets 21 filled in the cavity 5 must be in the shape of waves having different bending radii, and the large waves have better buffering performance than the small waves and the small waves have better stability and stability, so that the composite corrugated cardboard contains the large waves and the small waves at different positions. Therefore, the corrugated paper can have better deformation resistance and impact resistance under the action of keeping better strength.
As shown in fig. 1 and 2, in order to improve the stability of the corrugated sheets 21 in the cavity 5, the reinforcing paper sheet 4 and the face paper layer 1, the reinforcing paper sheet 4 and the inner paper layer 3, and the corrugated sheets 21 and the reinforcing paper sheet 4, the face paper layer 1 and the inner paper layer 3 are fixed to each other by a paper-plastic adhesive (not shown). The paper-plastic adhesive is a vinyl acetate-butyl acrylate copolymer emulsion adhesive. The vinyl acetate-butyl acrylate copolymer emulsion adhesive is prepared by adopting butyl acrylate, polyvinyl alcohol, vinyl acetate, an anionic emulsifier, starch, distilled water, a crosslinking agent (ethylene glycol dimethacrylate) and ammonium persulfate as raw materials. And the emulsion type adhesive is adopted to replace the traditional solvent type adhesive, so that the problems of serious pollution and toxicity, flammability and explosiveness, and inconvenient storage and transportation caused by a large amount of solvent (such as toluene, gasoline or ethyl acetate) volatilized into the air in the use process of the solvent type composite adhesive film can be effectively reduced. The adhesive is more green, safe and pollution-free when an operator uses the vinyl acetate-butyl acrylate copolymer emulsion adhesive.
As shown in fig. 1 and 2, in order to improve the deformation resistance of the corrugated paper, the composite corrugated paper board may be made into a five-layer, seven-layer or nine-layer composite corrugated paper board structure. Wherein, the five-layer composite corrugated board is provided with an inner paper layer 3, a corrugated core layer 2, an interlayer (not marked in the figure), the corrugated core layer 2 and a surface paper layer 1 in parallel from bottom to top. Four reinforcing paper boards 4 which are mutually crossed in pairs are arranged among the inner paper layer 3, the interlayer and the surface paper layer 1, one side of each reinforcing paper board 4 is fixedly bonded on the interlayer by adopting a paper-plastic adhesive, and the other side of each reinforcing paper board 4 is fixedly bonded on the inner paper layer 3 or the surface paper layer 1 by adopting the paper-plastic adhesive. Meanwhile, the inner paper layer 3, the interlayer, the reinforced paper board 4 and the surface paper layer 1 are all corrugated base paper.
A method for processing composite corrugated cardboard, as shown in fig. 4, comprising the following steps:
step S1, pretreatment of raw materials: manually refining and impurity removing the waste paper products; then the waste paper products after the separation and impurity removal are crushed into 1-4 cm by a crusher2Small pieces of (2);
step S2, defibration: placing the crushed small blocks in a storage bin, and alternately spraying water and a mixed solution of a urea-formaldehyde resin adhesive, paraffin and guanidine phosphate serving as a papermaking chemical additive in sequence until the surfaces of the small waste paper products are wetted; then, carrying out fiber separation treatment by a separator, filtering and washing by clear water for three times to obtain mixed raw stock;
step S3, stirring and pulping: concentrating the mixed raw stock obtained in the step S2 by a cylinder thickener; then grinding and pulping the mixed primary pulp in a medium-concentration hydraulic disc grinder, and controlling the concentration of paper pulp to be 6-12%; adding plant long fibers into the paper pulp, wherein the plant long fibers are mixed fibers of softwood long fibers, ramie fibers and coconut fibers, and stirring and mixing the mixed fibers under ultrasonic waves for 5-10 minutes to obtain slurry;
step S4, net feeding and forming dehydration: after the pulp obtained in the step S3 is sprayed out through an air cushion type head box of a paper machine, the pulp is dehydrated and formed from a printing point, the flow speed of the pulp is controlled to be 1.5-2 m/S, and the ratio of the pulp speed to the wire speed is controlled to be 1: 0.85-0.95;
step S5, paper making: making the pulp prepared in the step S4 into paper on a corrugated medium paper machine; then spraying the papermaking chemical auxiliary agent; then, carrying out large-roll-diameter pressing and wide-pressing area pressing and drying treatment, controlling the temperature of a drying cylinder to be 90-150 ℃, drying until the moisture of the paper surface is below 8-15%, and reeling to obtain the corrugated base paper;
step S6, rolling by a corrugating roller: rolling the corrugated medium obtained in the step S5 into corrugated paper sheets 21 in a wavy shape;
step S7, compound pasting: feeding corrugated paper sheets 21, a reinforced paper board 4, a surface paper layer 1, an inner paper layer 3 and other related corrugated base paper to an upper rubber roll for gluing and drying treatment, wherein the gluing amount is 8-10 g/m2The bonding temperature is 58 ℃; the drying temperature is 150 ℃, and the drying speed is 98 m/min to form a corrugated board;
step S8, cooling and shaping: cooling and shaping the corrugated board prepared in the step S7, wherein the cooling and shaping temperature is 15 ℃, and the cooling and shaping time is 5-8 seconds;
and S9, slitting, impressing, transversely cutting and stacking to obtain the composite corrugated board.
The fiber reinforced composite corrugated board obtained by the steps is subjected to mechanical test, the bursting strength is 1558 kPa, the edge pressure strength is 11.55 kN/m, the bonding strength is 785N/m, the compressive strength is 7.25 kN, the stacking drop test is qualified (time: 24 h, height 1.2 m), the stacking test is qualified (stacking height: 3 m, stacking weight: 189 kg, and stacking time: 24 h), compared with the equal gram weight corrugated board manufactured by the conventional process, the flat pressure strength, the main pressure bearing surface strength and the overall compressive strength of the corrugated board are increased by more than 20%, the drop strength is increased by more than 25%, and the packaging requirements of electromechanical products, discrete material packaging and the like can be met.
Example 2: a composite corrugated cardboard which differs from example 1 in that: as shown in fig. 3, the corrugated sheets 21 and the face paper layer 1 or the inner paper layer 3 form an alternating semi-conical support structure 6. Above-mentioned corrugated paper piece 21 bends into alternate half cone structure, and the curved surface of half cone has certain buffer performance this moment, can effectively reduce the probability that cavity 5 warp between interior paper layer 3 and the face paper layer 1 to above-mentioned compound corrugated container board's firmness and durability have been improved.
The fiber reinforced composite corrugated board obtained by the steps is subjected to mechanical test, the bursting strength is 1658 kPa, the edge pressure strength is 11.8 kN/m, the bonding strength is 794N/m, the compressive strength is 7.31 kN, the stacking drop test is qualified (time: 24 h, height 1.2 m), the stacking test is qualified (stacking height: 3 m, stacking weight: 189 kg, stacking time: 24 h), compared with the equal gram weight corrugated board manufactured by the conventional process, the flat pressure strength, the main pressure bearing surface strength and the overall compressive strength of the corrugated board are increased by more than 20%, the drop strength is increased by more than 25%, and the packaging requirements of electromechanical products, discrete material packaging and the like can be met.
Example 3: a composite corrugated cardboard which differs from example 1 in that: the paper-plastic adhesive is LF high-strength quick-drying starch glue. When the LF high-strength quick-drying starch adhesive is used instead of an organic adhesive, the use cost can be greatly reduced, and the market competitiveness of enterprises is improved.
The fiber reinforced composite corrugated board obtained by the steps is subjected to mechanical test, the bursting strength is 1557 kPa, the edge pressure strength is 11.45 kN/m, the bonding strength is 789N/m, the compressive strength is 7.21 kN, the stacking drop test is qualified (time: 24 h, height 1.2 m), the stacking test is qualified (stacking height: 3 m, stacking weight: 189 kg, and stacking time: 24 h), compared with the equal gram weight corrugated board manufactured by the conventional process, the flat pressure strength, the main pressure bearing surface strength and the overall compressive strength of the corrugated board are increased by more than 20%, the drop strength is increased by more than 25%, and the packaging requirements of electromechanical products, discrete material packaging and the like can be met.
Example 4: a composite corrugated cardboard which differs from example 1 in that: the plant long fiber is a mixed fiber of long needle-leaved wood fiber and ramie fiber.
The fiber reinforced composite corrugated board obtained by the steps is subjected to mechanical test, the bursting strength is 1605 kPa, the side pressure strength is 11.7 kN/m, the bonding strength is 786N/m, the compressive strength is 7.28 kN, the stacking drop test is qualified (time: 24 h, height 1.2 m), the stacking test is qualified (stacking height: 3 m, stacking weight: 189 kg, stacking time: 24 h), compared with the equal gram weight corrugated board manufactured by the conventional process, the flat pressure strength, the main pressure bearing surface strength and the overall compressive strength of the corrugated board are increased by more than 20%, the drop strength is increased by more than 25%, and the packaging requirements of electromechanical products, discrete material packaging and the like can be met.
Example 5: a composite corrugated cardboard which differs from example 1 in that: the plant long fiber is a mixed fiber of long needle wood fiber and coconut fiber.
The fiber reinforced composite corrugated board obtained by the steps is subjected to mechanical test, the bursting strength is 1611 kPa, the side pressure strength is 11.76 kN/m, the adhesive strength is 780N/m, the compressive strength is 7.24 kN, the stacking drop test is qualified (time: 24 h, height 1.2 m), the stacking test is qualified (stacking height: 3 m, stacking weight: 189 kg, and stacking time: 24 h), compared with the equal gram weight corrugated board manufactured by the conventional process, the flat pressure strength, the main pressure bearing surface strength and the overall compressive strength of the corrugated board are increased by more than 20%, the drop strength is increased by more than 25%, and the packaging requirements of electromechanical products, discrete material packaging and the like can be met.
Example 6: a composite corrugated cardboard which differs from example 1 in that: the plant long fiber is leaf wood long fiber.
The fiber reinforced composite corrugated board obtained by the steps is subjected to mechanical test, the bursting strength is 1598 kPa, the edge pressure strength is 11.64 kN/m, the adhesive strength is 781N/m, the compressive strength is 7.19 kN, the stacking drop test is qualified (time: 24 h, height 1.2 m), the stacking test is qualified (stacking height: 3 m, stacking weight: 189 kg, and stacking time: 24 h), compared with the corrugated board with the same gram weight manufactured by the conventional process, the flat pressure strength, the main pressure-bearing surface strength and the overall compressive strength are increased by more than 20%, the drop strength is increased by more than 25%, and the packaging requirements of electromechanical products, material packaging and the like can be met.
Example 7: a composite corrugated cardboard which differs from example 1 in that: the plant long fiber is coconut fiber.
The fiber reinforced composite corrugated board obtained by the steps is subjected to mechanical test, the bursting strength is 1623 kPa, the side pressure strength is 11.74 kN/m, the bonding strength is 794N/m, the compressive strength is 7.26 kN, the stacking drop test is qualified (time: 24 h, height 1.2 m), the stacking test is qualified (stacking height: 3 m, stacking weight: 189 kg, stacking time: 24 h), compared with the equal gram weight corrugated board manufactured by the conventional process, the flat pressure strength, the main pressure bearing surface strength and the overall compressive strength of the corrugated board are increased by more than 20%, the drop strength is increased by more than 25%, and the packaging requirements of electromechanical products, discrete material packaging and the like can be met.
The specific embodiments are only for explaining the present invention, and the present invention is not limited thereto, and those skilled in the art can make modifications without inventive contribution to the present embodiments 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 invention.
Claims (8)
1. The utility model provides a composite corrugated board, includes surface paper layer (1), flute core layer (2) and interior paper layer (3), interior paper layer (3) and surface paper layer (1) are located the inside and outside of flute core layer (2) respectively, flute core layer (2) include that a plurality of rows of continuous wave form's corrugated paper piece (21) constitute, its characterized in that: at least two reinforcing paper boards (4) are arranged between the surface paper layer (1) and the inner paper layer (3), one side of each reinforcing paper board (4) is fixedly connected to the surface paper layer (1), the other side of each reinforcing paper board is fixedly connected to the inner paper layer (3), and the corrugated paper sheets (21) are filled in a cavity (5) formed by the reinforcing paper boards (4), the surface paper layer (1), the reinforcing paper boards (4) and the inner paper layer (3) or the reinforcing paper boards (4), the surface paper layer (1) and the inner paper layer (3) and are bonded with the inner wall of the cavity (5);
at least two reinforcing paper boards (4) which are arranged in a cross mode are arranged between the surface paper layer (1) and the inner paper layer (3).
2. A composite corrugated board according to claim 1, characterised in that: and a support structure (6) with a continuous semicircular or semi-elliptical section is formed between each row of corrugated paper sheets (21) and the surface paper layer (1) or the inner paper layer (3).
3. A composite corrugated board according to claim 1, characterised in that: and alternate semi-conical supporting structures (6) are formed between each row of corrugated paper sheets (21) and the surface paper layer (1) or the inner paper layer (3).
4. A composite corrugated board according to claim 2 or 3, characterised in that: strengthen cardboard (4) and surface paper layer (1), strengthen cardboard (4) and interior paper layer (3) and all adopt paper-plastic adhesive to fix between corrugated paper piece (21) and strengthen cardboard (4), surface paper layer (1) and interior paper layer (3).
5. A composite corrugated board according to claim 4, characterised in that: the paper-plastic adhesive is a vinyl acetate-butyl acrylate copolymer emulsion adhesive.
6. A composite corrugated board according to claim 5, wherein: the paper-plastic adhesive is LF high-strength quick-drying starch glue.
7. A method of processing composite corrugated cardboard according to claim 1 or 2 or 3 or 5 or 6, characterized in that: comprises the following steps of the following operation steps,
step S1, pretreatment of raw materials: manually refining and impurity removing the waste paper products; pulverizing the waste paper product after removing impurities into 1-4 cm2Small pieces of (2);
step S2, defibration: placing the crushed small blocks in a storage bin, and alternately spraying water and a mixed solution of a urea-formaldehyde resin adhesive, paraffin and guanidine phosphate serving as a papermaking chemical additive in sequence until the surfaces of the small waste paper products are wetted; then, carrying out fiber separation treatment by a separator, filtering and washing by clear water for three times to obtain mixed raw stock;
step S3, stirring and pulping: concentrating the mixed raw stock obtained in the step S2 by a cylinder thickener; then grinding and pulping the mixed primary pulp in a medium-concentration hydraulic disc grinder, and controlling the concentration of paper pulp to be 6-12%; adding plant long fibers into the paper pulp, and stirring and mixing for 5-10 minutes under ultrasonic waves to obtain slurry;
step S4, net feeding and forming dehydration: after the pulp obtained in the step S3 is sprayed out through an air cushion type head box of a paper machine, the pulp is dehydrated and formed from a printing point, the flow speed of the pulp is controlled to be 1.5-2 m/S, and the ratio of the pulp speed to the wire speed is controlled to be 1: 0.85-0.95;
step S5, paper making: making the pulp prepared in the step S4 into paper on a corrugated medium paper machine; then spraying the papermaking chemical auxiliary agent; then, carrying out large-roll-diameter pressing and wide-pressing area pressing and drying treatment, controlling the temperature of a drying cylinder at 90-150 ℃, drying until the moisture on the paper surface is 6-12%, and reeling to obtain the corrugated base paper;
step S6, rolling by a corrugating roller: rolling the corrugated medium obtained in the step S5 into corrugated paper sheets (21) in a wave shape by a corrugating roller;
step S7, compound pasting: corrugated paper sheets (21), reinforced paper sheets (4) andthe corrugated base paper is sent to a gluing roller for gluing and drying treatment, wherein the gluing amount is 8-10 g/m2The bonding temperature is 58 ℃; the drying temperature is 150 ℃, and the drying speed is 98 m/min to form a corrugated board;
step S8, cooling and shaping: cooling and shaping the corrugated board prepared in the step S7, wherein the cooling and shaping temperature is 15 ℃, and the cooling and shaping time is 5-8 seconds;
and S9, slitting, creasing, transversely cutting and stacking.
8. A method of processing composite corrugated cardboard as claimed in claim 7, characterized in that: the plant long fiber added in step S3 is one or a combination of two or more of softwood long fiber, ramie fiber, and coconut fiber.
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| CN109024060A (en) * | 2018-07-10 | 2018-12-18 | 海盐县元通街道玖玖包装厂 | A kind of processing technology of corrugated board |
| CN109333955A (en) * | 2018-10-09 | 2019-02-15 | 昆山鸣朋纸业有限公司 | A kind of high-performance cardboard is without cracking production technology |
| CN110045674A (en) * | 2019-03-26 | 2019-07-23 | 温岭市森林包装有限公司 | Embossed paper hydraulic forming board control system based on PLC |
| CN110802879A (en) * | 2019-11-13 | 2020-02-18 | 黄展才 | Production method of corrugated board for packaging box |
| CN110978713B (en) * | 2019-11-28 | 2021-08-03 | 上海绚丽包装彩印有限公司 | Composite corrugated board |
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| TWM272756U (en) * | 2005-02-03 | 2005-08-11 | Shr-Huei Li | Paper pallet structure |
| KR100824293B1 (en) * | 2006-12-07 | 2008-04-22 | 마영훈 | Papar envelope of absorb shoch for packing |
| CN106218174A (en) * | 2016-08-27 | 2016-12-14 | 特耐王包装（福州）有限公司 | A kind of high-strength waterproof corrugated board and preparation method thereof |
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| TWM272756U (en) * | 2005-02-03 | 2005-08-11 | Shr-Huei Li | Paper pallet structure |
| KR100824293B1 (en) * | 2006-12-07 | 2008-04-22 | 마영훈 | Papar envelope of absorb shoch for packing |
| CN205929687U (en) * | 2016-06-28 | 2017-02-08 | 广东宝雅纸业有限公司 | Corrugated container board with single face water proof membrane |
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