CN115991011B - Production process of light high-strength corrugated board - Google Patents
Production process of light high-strength corrugated board Download PDFInfo
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- CN115991011B CN115991011B CN202310292890.7A CN202310292890A CN115991011B CN 115991011 B CN115991011 B CN 115991011B CN 202310292890 A CN202310292890 A CN 202310292890A CN 115991011 B CN115991011 B CN 115991011B
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Abstract
The invention discloses a production process of a light high-strength corrugated board, which comprises the following steps of: (1) Arranging a plurality of strip-shaped corrugated sheets side by side on a horizontal plane in a side-to-side manner, wherein the strip-shaped corrugated sheets have wavy projections on the horizontal plane; (2) Respectively sucking each first positioning supporting sheet to the upper edges of two adjacent strip corrugated sheets in a negative pressure suction mode, (3) compounding first cardboard paper on the upper end surfaces of each strip corrugated sheet and the upper surfaces of each first positioning supporting sheet; (4) Sucking the second positioning support plates to the lower edges of two adjacent strip corrugated plates respectively by means of negative pressure suction; (5) Compounding a second cardboard paper on the lower end surface of each strip corrugated sheet and the lower surface of each second positioning support sheet; and (6) drying to obtain the light high-strength corrugated board. The invention can improve the integral strength and the supporting strength of the corrugated board on the premise of basically unchanged paper consumption.
Description
Technical Field
The invention relates to corrugated boards, in particular to a production process of light high-strength corrugated boards.
Background
The existing corrugated board is formed by bonding at least one layer of corrugated sheets and one layer of cardboard (also called as a cardboard), has good elasticity and extensibility, and is mainly used for manufacturing cartons, sandwiches of the cartons and other packaging materials of fragile goods. The corrugated waves of the corrugated sheets are like connected arched doors, are mutually arranged in a row and mutually supported, and the wave crest and the wave trough of each arched door are respectively attached with the boxboard paper to form a triangular structure body, so that the corrugated sheet has good elasticity and good buffering effect, and can bear certain pressure from a plane.
However, as the requirements of people on the packaging of products are higher and higher, the requirements on the compressive strength and the cushioning resistance of the packaging cartons are raised, the flat compressive strength and the impact resistance of the conventional corrugated paper board are still insufficient for part of the products, when heavier products are placed on the cartons of the corrugated paper board during packaging, the heavier products are influenced by the gravity of the products, the corrugated waves of the corrugated sheets are extruded in the horizontal direction, so that the triangular structure in the corrugated paper board is collapsed or deformed, the corrugated paper board cannot pack the products well, and the safe transportation of the products is influenced.
At present, in order to improve the integral strength of the corrugated board, a multi-layer corrugated board structure is generally adopted, so that the thickness and the paper consumption of the corrugated board are in direct proportion to the strength requirement, the packaging cost is increased in multiple, and in certain packaging requirements, the too thick and too heavy corrugated board is obviously unsuitable.
Disclosure of Invention
The invention aims to solve the problem of providing a production process of a light high-strength corrugated board, which can improve the integral strength and the supporting strength of the corrugated board on the premise that the paper consumption is basically unchanged.
In order to solve the technical problems, the invention adopts the following technical scheme:
the production process of the light high-strength corrugated board is characterized by comprising the following steps of:
(1) Arranging a plurality of strip corrugated sheets on a horizontal plane side by side in a side-to-side manner, wherein each strip corrugated sheet is provided with wavy projections on the horizontal plane, and the wave crest of the wavy projection of one strip corrugated sheet is opposite to the wave trough of the wavy projection of the other strip corrugated sheet; positioning support sheet assemblies are placed between two adjacent strip-shaped corrugated sheets, and each positioning support sheet assembly is formed by stacking a first positioning support sheet and a second positioning support sheet up and down;
(2) Sucking the first positioning support plates to the upper edges of two adjacent strip-shaped corrugated plates respectively in a negative pressure suction mode, so that the upper surfaces of the first positioning support plates are level with the upper end surfaces of the strip-shaped corrugated plates;
(3) Coating a first adhesive layer on the upper end surface of each strip corrugated sheet and the upper surface of each first positioning support sheet, and compounding first cardboard paper;
(4) Sucking the second positioning support plates to the lower edges of two adjacent strip-shaped corrugated plates respectively in a negative pressure suction mode, so that the lower surfaces of the second positioning support plates are level with the lower end surfaces of the strip-shaped corrugated plates;
(5) Coating a second adhesive layer on the lower end surface of each strip corrugated sheet and the lower surface of each second positioning support sheet, and compounding second cardboard paper;
(6) And drying to obtain the light high-strength corrugated board.
Preferably, the step (1) specifically includes:
step (1-1), arranging a frame, a first grid bottom plate and a second grid bottom plate according to the specification of the light high-strength corrugated board, and placing the frame on the second grid bottom plate, wherein the second grid bottom plate is horizontally arranged to form the horizontal plane;
step (1-2) alternately placing the long corrugated sheets and the positioning support sheet assemblies on the second grid bottom plate from one side edge of the frame to the opposite side edge until the long corrugated sheets and the positioning support sheet assemblies fill the frame and keep close contact fit between adjacent long corrugated sheets and positioning support sheet assemblies, and the projection of the long corrugated sheets on the second grid bottom plate is wavy.
In a further preferred scheme, the frame in the step (1-1) encloses the positioning groove of the light high-strength corrugated board, and the lengths of the first positioning supporting sheet, the second positioning supporting sheet and the strip corrugated sheet are matched with the width of the positioning groove.
Further preferably, the first grid bottom plate and the second grid bottom plate in the step (1-1) are provided with a plurality of through holes which are vertically communicated, and each through hole is arranged in a grid shape. In a specific scheme, the first grid bottom plate and the second grid bottom plate can be wire netting.
In a further preferred embodiment, in the step (2), the first grid bottom plate is stacked on top of each of the long corrugated sheets, negative pressure suction is performed on the first positioning support sheets between each of the long corrugated sheets above the first grid bottom plate, the first positioning support sheets are all sucked to the top between each of the long corrugated sheets, and then the negative pressure and the first grid bottom plate are removed.
In a further preferred embodiment, in the step (4), the second grid bottom plate, the frame, the strip corrugated sheets, the first positioning support sheets, the second positioning support sheets and the first cardboard paper on the second grid bottom plate are turned over, so that the second grid bottom plate at the bottom is turned over to the top of the strip corrugated sheets, negative pressure suction is performed on the second positioning support sheets between the strip corrugated sheets above the second grid bottom plate, the second positioning support sheets are all sucked to the top between the strip corrugated sheets, and then the negative pressure and the second grid bottom plate are removed.
In the step (1), the first positioning supporting sheet and the second positioning supporting sheet are clamped at the lower part between two adjacent strip-shaped corrugated sheets, and a strip-shaped wave channel is formed at the upper part between the two adjacent strip-shaped corrugated sheets; the first grid bottom plate in the step (1-1) is overlapped on the top of each strip corrugated sheet, so that the through holes on the first grid bottom plate are communicated with the strip wave channels between the upper parts of each strip corrugated sheet, and when the first positioning support sheet between each strip corrugated sheet is sucked under negative pressure above the first grid bottom plate positioned at the top in the step (2), the air flow at the lower part sequentially passes through each strip wave channel and each through hole from bottom to top, and the first positioning support sheet is sucked to the top between each strip corrugated sheet; then the first cardboard paper is attached to the upper end surfaces of the strip corrugated sheets and the upper surfaces of the first positioning supporting sheets through the first adhesive layer in the step (3); lightly rolling the first cardboard paper to enable the first cardboard paper to be tightly attached to the upper end face of each strip corrugated sheet and the upper surface of each first positioning supporting sheet; the step (4) is performed with overturning operation, the second grid bottom plate in the step (1-1) is overlapped on the top of each strip corrugated sheet, through holes on the second grid bottom plate are communicated with strip wave channels between the upper parts of each strip corrugated sheet, when the step (4) is performed with negative pressure suction on the second positioning support sheets between each strip corrugated sheet above the second grid bottom plate positioned on the top, air flow at the lower part sequentially passes through each strip wave channel and each through hole from bottom to top, and the second positioning support sheets are all sucked to the tops between each strip corrugated sheet; then the second cardboard paper is attached to the upper end face of each strip corrugated sheet and the upper surface of each second positioning supporting sheet through the second adhesive layer in the step (5); and lightly rolling the second cardboard paper to enable the second cardboard paper to be tightly attached to the upper end surfaces of the strip corrugated sheets and the upper surfaces of the second positioning supporting sheets.
Preferably, the two sides of the first positioning supporting sheet and the second positioning supporting sheet are wavy, and the first positioning supporting sheet and the second positioning supporting sheet are embedded with the adjacent two strip corrugated sheets. The first positioning supporting sheet and the second positioning supporting sheet are embedded with each other with two adjacent strip-shaped corrugated sheets, namely, the convex parts of the first positioning supporting sheet and the convex parts of the second positioning supporting sheet extend into the corresponding concave parts of the strip-shaped corrugated sheets, and the convex parts of the strip-shaped corrugated sheets extend into the corresponding concave parts of the first positioning supporting sheet and the second positioning supporting sheet. In the light high-strength corrugated board, the convex parts of the first positioning support sheet are mainly used for supporting the corresponding concave parts at the tops of the strip-shaped corrugated sheets, and the convex parts of the second positioning support sheet are mainly used for supporting the corresponding concave parts at the bottoms of the strip-shaped corrugated sheets, so that the strength of the strip-shaped wave space can be enhanced, and the corrugated board is prevented from deforming.
In the preferred scheme, in the step (1), the whole corrugated sheet is cut into a plurality of strip corrugated sheets in a cutting mode. In a specific embodiment, in the step (1), the shape and the size of each strip corrugated sheet are the same.
In a further preferred embodiment, in the step (1), the edge of the slit strip corrugated sheet is further subjected to strengthening pretreatment. The edge of the strip corrugated sheet is subjected to strengthening pretreatment, so that the edge strength of the strip corrugated sheet can be greatly improved, and the supporting strength of the strip corrugated sheet serving as a cross beam and a semicircular supporting column group is greatly improved.
In a further preferred embodiment, in the step (1), the strengthening pretreatment includes spraying a coating on the edge of the strip corrugated sheet.
Still further preferably, in the step (1), the coating is a starch coating. In spraying the starch coating, the starch is gelatinized to prepare a solution, and the starch solution is sprayed on the edges of the long corrugated sheets (on both sides of the edges of the long corrugated sheets) by using a spray gun or a glue spraying device. The strip corrugated sheet can be integrated with the starch coating in the drying process, so that the effect of enhancing the paper strength is achieved, the edge strength can be improved by about 45%, and the tearing index and roughness index and the contrast before strengthening are obviously improved. Of course, the coating can also adopt common glue, resin and the like, and can play a role in strengthening.
In the step (1-1), the second grid bottom plate and the frame on the second grid bottom plate are arranged on the power output end of the turnover mechanism, and the second grid bottom plate and the frame on the second grid bottom plate, the strip corrugated sheets, the first positioning support sheets, the second positioning support sheets and the first boxboard paper are turned over through the turnover mechanism. In general, the turnover mechanism may be a manipulator having a clamping and turnover function.
In the preferred scheme, in the step (3) and the step (5), the first cardboard paper and the second cardboard paper are lightly rolled respectively, so that the first cardboard paper is tightly attached to the upper end surface of each strip corrugated sheet and the upper surface of each first positioning supporting sheet, and the second cardboard paper is tightly attached to the lower end surface of each strip corrugated sheet and the lower surface of each second positioning supporting sheet.
Compared with the prior art, the invention has the following advantages:
in the light high-strength corrugated board, each strip corrugated sheet is vertically arranged between the first cardboard paper and the second cardboard paper, the projection of each strip corrugated sheet on the second cardboard paper below is wavy, each strip corrugated sheet forms a semicircular support column group which is densely arranged on the perpendicular cardboard paper (or the stress direction), semicircular support columns formed by the same strip corrugated sheet are continuously connected to form a stable structure, each strip corrugated sheet forms a cross beam between the first cardboard paper and the second cardboard paper in the transverse direction, if a product or other heavy objects are placed on the corrugated board, the bottom of the product is supported by a plurality of cross beams and a plurality of vertical semicircular support columns, the phenomenon of collapse or deformation is difficult to occur, the whole corrugated board can bear larger pressure on the premise that the paper consumption is basically unchanged, the whole strength of the corrugated board is improved, and the supporting strength of the whole corrugated board is better.
In the light high-strength corrugated board that makes, first location backing sheet supports the top between two adjacent rectangular form corrugated sheets, the second location backing sheet supports the bottom between two adjacent rectangular form corrugated sheets, rectangular form corrugated sheet has been restricted and deformation does not take place in the horizontal direction, and make each rectangular form corrugated sheet through the laminating of two-layer cardboard, first location backing sheet, second location backing sheet link into an organic whole, make form bar wave space between two-layer cardboard, strengthen intensity and the supporting force between two-layer cardboard on the quantity of minimizing corrugated paper.
Drawings
FIG. 1 is a schematic structural view of embodiment 1 of the present invention;
FIG. 2 is a cross-sectional view of the locating support tab assembly of FIG. 1 disposed between two adjacent corrugated strips;
FIG. 3 is a schematic view showing the layered structure of the lightweight high-strength corrugated paper in example 1 of the present invention;
fig. 4 is a schematic structural diagram of a frame, a first grid base plate, and a second grid base plate in embodiment 1 of the present invention.
Detailed Description
The invention is described in detail below with reference to the drawings and the specific embodiments.
Example 1
As shown in fig. 1 to 3, the process for producing the lightweight high-strength corrugated board in this embodiment includes the following steps:
(1) Arranging a plurality of strip corrugated sheets 1 side by side on a horizontal plane in a side-to-side manner, wherein the strip corrugated sheets 1 have wavy projections on the horizontal plane, and two adjacent strip corrugated sheets 1, wherein the wave crest of the wavy projection of one strip corrugated sheet is opposite to the wave trough of the wavy projection of the other strip corrugated sheet; positioning support sheet assemblies 2 are placed between two adjacent strip-shaped corrugated sheets 1, and the positioning support sheet assemblies 2 are formed by stacking a first positioning support sheet 21 and a second positioning support sheet 22 up and down;
(2) Sucking the first positioning support pieces 21 to the upper edges of two adjacent strip-shaped corrugated sheets 1 respectively in a negative pressure suction mode, so that the upper surfaces of the first positioning support pieces 21 are level with the upper end surfaces of the strip-shaped corrugated sheets 1;
(3) Coating a first adhesive layer 3 on the upper end surface of each strip corrugated sheet 1 and the upper surface of each first positioning support sheet 21, and compounding first cardboard paper 4;
(4) Sucking each second positioning support piece 22 to the lower edges of two adjacent strip-shaped corrugated sheets 1 by means of negative pressure suction, so that the lower surface of each second positioning support piece 22 is level with the lower end surface of each strip-shaped corrugated sheet 1;
(5) Coating a second adhesive layer 5 on the lower end surface of each strip corrugated sheet 1 and the lower surface of each second positioning support sheet 22, and compounding a second cardboard paper 6;
(6) And drying to obtain the light high-strength corrugated board.
The step (1) specifically includes:
as shown in fig. 4, step (1-1) sets a frame 7, a first mesh base plate 8 and a second mesh base plate 9 according to the specification of the lightweight high-strength corrugated board, and places the frame 7 on the second mesh base plate 9, the second mesh base plate 9 being horizontally arranged to constitute the horizontal plane;
step (1-2) from one side edge of the frame 7 to the opposite other side edge, alternately placing the strip corrugated sheets 1 and the positioning support sheet assemblies 2 on the second grid bottom plate 9 until the strip corrugated sheets 1 and the positioning support sheet assemblies 2 fill the frame 7 and keep the adjacent strip corrugated sheets 1 and the positioning support sheet assemblies 2 in close contact fit, and the projection of the strip corrugated sheets 1 on the second grid bottom plate 9 is wavy.
The frame 7 in the step (1-1) encloses the positioning groove 71 of the light high-strength corrugated board, and the lengths of the first positioning supporting sheet 21, the second positioning supporting sheet 22 and the strip corrugated sheet 1 are matched with the width of the positioning groove 71.
The first grid bottom plate 8 and the second grid bottom plate 9 in the step (1-1) are respectively provided with a plurality of through holes 81 which are penetrated from top to bottom, and each through hole 81 is arranged in a grid shape.
In the step (2), the first mesh bottom plates 8 are stacked on top of each of the long corrugated sheets 1, the first positioning support sheets 21 between each of the long corrugated sheets 1 are sucked under negative pressure above the first mesh bottom plates 8, all the first positioning support sheets 21 are sucked to the top between each of the long corrugated sheets 1, and then the negative pressure and the first mesh bottom plates 8 are removed.
In the step (4), the second grid bottom plate 9 and the frames 7, the strip corrugated sheets 1, the first positioning support sheets 21, the second positioning support sheets 22 and the first cardboard paper 4 on the second grid bottom plate 9 are turned over, the second grid bottom plate 9 at the bottom is turned over to the top of the strip corrugated sheets 1, the second positioning support sheets 22 among the strip corrugated sheets 1 are sucked above the second grid bottom plate 9 under negative pressure, the second positioning support sheets 22 are all sucked to the top among the strip corrugated sheets 1, and then the negative pressure and the second grid bottom plate 9 are removed.
In the step (1), the first positioning support sheet 21 and the second positioning support sheet 22 are sandwiched between the lower portions of two adjacent strip corrugated sheets 1, and a strip wave channel 10 is formed at the upper portion between two adjacent strip corrugated sheets 1; the first grid bottom plate 8 in the step (1-1) is overlapped on the top of each strip corrugated sheet 1, so that the through holes 81 on the first grid bottom plate 8 are communicated with the strip corrugated channels 10 between the upper parts of each strip corrugated sheet 1, and when the first positioning support sheet 21 between each strip corrugated sheet 1 is sucked under negative pressure above the first grid bottom plate 8 positioned on the top in the step (2), the air flow at the lower part sequentially passes through each strip corrugated channel 10 and each through hole 81 from bottom to top, and the first positioning support sheet 21 is sucked to the top between each strip corrugated sheet 1; then the first cardboard paper 4 is attached to the upper end surfaces of the strip corrugated sheets 1 and the upper surfaces of the first positioning supporting sheets 21 through the first adhesive layer 3 in the step (3); lightly rolling the first cardboard paper 4 to enable the first cardboard paper 4 to be tightly attached to the upper end face of each strip corrugated sheet 1 and the upper surface of each first positioning supporting sheet 21; in the step (4), the overturning operation is performed, the second grid bottom plate 9 in the step (1-1) is overlapped on the top of each strip corrugated sheet 1, the through holes 81 on the second grid bottom plate 9 are communicated with the strip wave channels 10 between the upper parts of each strip corrugated sheet 1, when the step (4) performs negative pressure suction on the second positioning support sheet 22 between each strip corrugated sheet 1 above the second grid bottom plate 9 positioned on the top, the air flow at the lower part sequentially passes through each strip wave channel 10 and each through hole 81 from bottom to top, and the second positioning support sheet 22 is sucked to the top between each strip corrugated sheet 1; then the second cardboard paper 6 is attached to the upper end face of each strip corrugated sheet 1 and the upper surface of each second positioning supporting sheet 22 through the second adhesive layer 5 in the step (5); the second cardboard paper 6 is lightly rolled, so that the second cardboard paper 6 is tightly attached to the upper end surface of each strip corrugated sheet 1 and the upper surface of each second positioning support sheet 22.
In the step (1), both sides of the first positioning support piece 21 and the second positioning support piece 22 are wavy, and the first positioning support piece 21 and the second positioning support piece 22 are embedded with two adjacent strip corrugated pieces 1. The first positioning support sheet 21 and the second positioning support sheet 22 are embedded with two adjacent elongated corrugated sheets 1, that is, the convex portions of the first positioning support sheet 21 and the convex portions of the second positioning support sheet 22 extend into the corresponding concave portions of the elongated corrugated sheets 1, and the convex portions of the elongated corrugated sheets 1 extend into the corresponding concave portions of the first positioning support sheet 21 and the second positioning support sheet 22. In the light high-strength corrugated board, the convex parts of the first positioning supporting sheet 21 are mainly used for supporting the corresponding concave parts at the top of the strip-shaped corrugated board 1, and the convex parts of the second positioning supporting sheet 22 are mainly used for supporting the corresponding concave parts at the bottom of the strip-shaped corrugated board 1, so that the strength of the strip-shaped wave space can be enhanced, and the corrugated board is prevented from deforming.
In the step (1), the whole corrugated sheet is cut into a plurality of strip corrugated sheets 1 in a cutting mode. In the step (1), the shape and the size of each strip corrugated sheet 1 are the same.
In the step (1), the edge of the slit strip corrugated sheet 1 is subjected to strengthening pretreatment. The edge of the strip corrugated sheet 1 is subjected to strengthening pretreatment, so that the edge strength of the strip corrugated sheet 1 can be greatly improved, and the supporting strength of the strip corrugated sheet 1 serving as a cross beam and semicircular supporting column group is greatly improved.
In the step (1), the strengthening pretreatment comprises spraying a coating 11 on the edge of the strip corrugated sheet 1.
In step (1), the coating 11 is a starch coating. In spraying the starch coating, the starch is gelatinized to prepare a solution, and the starch solution is sprayed on the edges of the long corrugated sheet 1 (both sides of the edge of the long corrugated sheet 1) by using a spray gun or a glue spraying device. The strip corrugated sheet 1 can be integrated with the starch coating in the drying process, so that the effect of enhancing the paper strength is achieved, the edge strength can be improved by about 45%, and the tearing index and roughness index and the contrast before strengthening are obviously improved. Of course, the coating can also adopt common glue, resin and the like, and can play a role in strengthening.
In the step (1-1), the second grid bottom plate 9 and the frame 7 thereon are arranged on the power output end of the turnover mechanism, and the turnover mechanism turns over the second grid bottom plate 9 and the frame 7 thereon, each strip corrugated sheet 1, each first positioning support sheet 21, each second positioning support sheet 22 and the first cardboard paper 4. In general, the turnover mechanism may be a manipulator having a clamping and turnover function.
In the steps (3) and (5), the first cardboard paper 4 and the second cardboard paper 6 are lightly rolled, so that the first cardboard paper 4 is tightly attached to the upper end surface of each long corrugated sheet 1 and the upper surface of each first positioning support sheet 21, and the second cardboard paper 6 is tightly attached to the lower end surface of each long corrugated sheet 1 and the lower surface of each second positioning support sheet 22.
Comparative example 1
The corrugated board in this comparative example is a single corrugated board (also called a three-layer corrugated board, the standard code of which is denoted by S): there are two layers of paper or paper board and one layer of corrugated paper bonded to form the corrugated board. The single corrugated board is divided into 1-5 categories according to the minimum comprehensive ration (the minimum comprehensive ration of the corrugated board is the composition except the corrugated board, and the sum of the ration of each layer of paper or board of the corrugated board) and S-2.1-S-2.5: the single corrugated board is respectively classified into class 1 to class 5 of qualified single corrugated board products.
Comparative example 2
The corrugated board in this comparative example is a double corrugated board (also called five-layer corrugated board, the standard code of which is denoted by D): there are three layers of paper or paper board and two layers of corrugated paper bonded to form a corrugated board. The double corrugated boards are classified into 1-5 types, D-2.1-D-2.5 according to the minimum comprehensive quantitative differences of the double corrugated boards: the two corrugated boards are respectively 1 st class to 5 th class of qualified products of the double corrugated boards.
Comparative example 3
The corrugated board in this comparative example is a three-corrugated board (also called seven-ply corrugated board, the standard code of which is denoted by T): there are four layers of paper or paper board and three layers of corrugated paper bonded to form the corrugated board. The three corrugated boards are classified into 1-4 types, T-2.1-T-2.4 according to the minimum comprehensive quantitative differences: the three corrugated board qualified products are respectively of class 1 to class 4.
The corrugated boards obtained in example 1 and comparative examples 1 to 3 were tested for two performance indexes, namely, burst strength and edge pressure strength. Pretreatment conditions and test environment the test specimens were pretreated for 24 hours in an environment with a relative humidity of 50% and 5% at a temperature of 23℃and a temperature of 2℃as specified in GB4857.2, and tested under these conditions. Wherein:
(1) Burst strength test: the adhesive films were attached 10 times to each of the front and back surfaces of the test piece according to GB6545, and the results were expressed as arithmetic average values of all the measured values. The burst strength of corrugated board refers to the maximum pressure that paper or board can bear in unit area and increase uniformly, and the unit is kPa;
(2) Edge pressure intensity test: according to GB6546, the arithmetic average value of the measured values is taken as an edge pressure intensity value, the edge pressure intensity value is expressed as KN/m, and three significant digits are taken. The edge compression strength of the corrugated board refers to the pressure applied to the corrugated board in unit length when the pit direction is crushed, and the unit KN/m.
The burst strength and the side compression strength of the corrugated cardboards obtained in example 1 were compared with those of the corrugated cardboards obtained in comparative examples 1 to 3, and the test results are shown in table 1 below.
Table 1: test results of example 1 and comparative examples 1 to 3
From the above test results, it can be seen that:
compared with the three-layer corrugated board of the comparative example 1, the light high-strength corrugated board of the example 1 has higher burst strength and edge pressure strength according to the minimum comprehensive ration on the premise that the paper consumption is basically unchanged.
Compared with the five-layer corrugated board of the comparative example 2, the lightweight high-strength corrugated board of the example 1 not only reduces the consumption of corrugated paper according to the minimum comprehensive quantification, but also has higher burst strength and edge compression strength.
Compared with the seven layers of corrugated boards of the comparative example 3, the lightweight high-strength corrugated board of the embodiment 1 has the least comprehensive quantification according to the least comprehensive quantification, and the bursting strength and the edge pressure intensity of the lightweight high-strength corrugated board of the embodiment 1 are only slightly lower than those of the seven layers of corrugated boards of the comparative example 3, so that the bursting strength and the edge pressure intensity of the lightweight high-strength corrugated board of the embodiment 1 are close to those of the seven layers of corrugated boards under the condition that the consumption of the corrugated boards is less.
In addition, it should be noted that, in the specific embodiments described in the present specification, names of various parts and the like may be different, and all equivalent or simple changes of the structures, features and principles described in the conception of the present invention are included in the protection scope of the present invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions in a similar manner without departing from the scope of the invention as defined in the accompanying claims.
Claims (8)
1. The production process of the light high-strength corrugated board is characterized by comprising the following steps of:
(1) Arranging a plurality of strip corrugated sheets on a horizontal plane side by side in a side-to-side manner, wherein each strip corrugated sheet is provided with wavy projections on the horizontal plane, and the wave crest of the wavy projection of one strip corrugated sheet is opposite to the wave trough of the wavy projection of the other strip corrugated sheet; positioning support sheet assemblies are placed between two adjacent strip-shaped corrugated sheets, and each positioning support sheet assembly is formed by stacking a first positioning support sheet and a second positioning support sheet up and down;
step (1-1), arranging a frame, a first grid bottom plate and a second grid bottom plate according to the specification of the light high-strength corrugated board, and placing the frame on the second grid bottom plate, wherein the second grid bottom plate is horizontally arranged to form the horizontal plane;
step (1-2), alternately placing long corrugated sheets and positioning support sheet assemblies on the second grid bottom plate from one side edge of the frame to the opposite side edge until the long corrugated sheets and positioning support sheet assemblies fill the frame and keep close contact fit between adjacent long corrugated sheets and positioning support sheet assemblies, and projecting the long corrugated sheets on the second grid bottom plate in a wavy manner;
(2) Through the negative pressure air suction mode, the upper edges of two adjacent strip-shaped corrugated sheets are respectively sucked by each first positioning supporting sheet, so that the upper surface of each first positioning supporting sheet is flush with the upper end face of each strip-shaped corrugated sheet: stacking the first grid bottom plates on the tops of the long corrugated sheets, carrying out negative pressure suction on the first positioning supporting sheets among the long corrugated sheets above the first grid bottom plates, sucking the first positioning supporting sheets to the tops among the long corrugated sheets completely, and then removing the negative pressure and the first grid bottom plates;
(3) Coating a first adhesive layer on the upper end surface of each strip corrugated sheet and the upper surface of each first positioning support sheet, and compounding first cardboard paper;
(4) Sucking the second positioning support plates to the lower edges of two adjacent strip-shaped corrugated plates respectively in a negative pressure suction mode, so that the lower surfaces of the second positioning support plates are level with the lower end surfaces of the strip-shaped corrugated plates;
(5) Coating a second adhesive layer on the lower end surface of each strip corrugated sheet and the lower surface of each second positioning support sheet, and compounding second cardboard paper;
(6) And drying to obtain the light high-strength corrugated board.
2. The process for producing lightweight high strength corrugated board as claimed in claim 1, wherein: the frame in the step (1-1) encloses the positioning groove of the light high-strength corrugated board, and the lengths of the first positioning supporting sheet, the second positioning supporting sheet and the strip corrugated sheet are matched with the width of the positioning groove.
3. The process for producing lightweight high strength corrugated board as claimed in claim 1, wherein: in the step (4), the second grid bottom plate and the frames, the strip corrugated sheets, the first positioning support sheets, the second positioning support sheets and the first cardboard paper on the second grid bottom plate are turned over, so that the second grid bottom plate at the bottom is turned over to the top of the strip corrugated sheets, the second positioning support sheets among the strip corrugated sheets are sucked above the second grid bottom plate under negative pressure, the second positioning support sheets are all sucked to the top among the strip corrugated sheets, and then the negative pressure and the second grid bottom plate are removed.
4. The process for producing lightweight high strength corrugated board as claimed in claim 1, wherein: in the step (1), both sides of the first positioning supporting sheet and the second positioning supporting sheet are wavy, and the first positioning supporting sheet and the second positioning supporting sheet are embedded with two adjacent strip corrugated sheets.
5. The process for producing lightweight high strength corrugated board as claimed in claim 1, wherein: in the step (1), the whole corrugated sheet is cut into a plurality of strip corrugated sheets in a cutting mode.
6. The process for producing lightweight high strength corrugated board as claimed in claim 5, wherein: in the step (1), the edge of the slit strip corrugated sheet is subjected to strengthening pretreatment.
7. The process for producing lightweight high strength corrugated board as claimed in claim 6, wherein: in the step (1), the strengthening pretreatment comprises spraying a coating on the edge of the strip corrugated sheet.
8. The process for producing lightweight high strength corrugated board as claimed in claim 7, wherein: in the step (1), the coating is a starch coating.
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| CN115991011B true CN115991011B (en) | 2023-05-19 |
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| CN115991011A (en) | 2023-04-21 |
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