Process for manufacturing an impact-resistant thermal insulation type corrugated paper

Abstract

The application relates to the technical field of corrugated paperboards, and discloses a manufacturing process of an impact-resistant and heat-insulating corrugated paper, which comprises the following steps: preparing paper pulp, adding a reinforcing agent into the paper pulp to obtain raw paper sheets; performing heat treatment on the raw paper sheets and performing glue coating treatment on the surfaces of the raw paper sheets; wherein, before the glue coating treatment on the raw paper sheets, state data of the raw paper sheets are acquired, the state data of the raw paper sheets are processed to obtain state values of the raw paper sheets, and the quality of the raw paper sheets is identified based on the state values of the raw paper sheets; if the quality of the raw paper sheets meets preset quality requirements of the raw paper sheets, the glue coating treatment is performed on the raw paper sheets; if the quality of the raw paper sheets does not meet the preset quality requirements of the raw paper sheets, the first preparation step of the raw paper sheets is adjusted; the raw paper sheets are compounded by a corrugating machine to obtain the corrugated paper; and the corrugated paper is dried and then cooled to obtain the impact-resistant and heat-insulating corrugated paper; and the application realizes the identification of the state of the raw paper sheets before the glue coating treatment, and effectively avoids the waste of raw materials and labor costs.

Description

Technical Field

[0001] This invention relates to the field of corrugated cardboard technology, and specifically to a manufacturing process for impact-resistant and heat-insulating corrugated paper. Background Technology

[0002] Corrugated cardboard is a multi-layered adhesive, consisting of at least one layer of corrugated core paper (also known as corrugated sheet, corrugated paper, corrugated core, corrugated base paper) and one layer of cardboard. It has high mechanical strength and can withstand collisions and drops during handling. The actual performance of corrugated cardboard depends on three factors: the characteristics of the core paper and the cardboard, and the structure of the carton itself.

[0003] For example, patent application number 201910150341.X discloses a processing method for high-strength corrugated paper, including the following steps: Step 1, preparing base paper pulp; Step 2, adding reinforcing agent to the base paper pulp; Step 3, heat-treating the base paper; Step 4, applying adhesive to the surface of the base paper; Step 5, laminating the base paper with a corrugating machine to obtain corrugated paper; Step 6, drying and cooling to obtain high-strength corrugated paper.

[0004] The key factor in the impact resistance and heat insulation of corrugated paper is the quality of the base paper. When the quality of all the base papers that make up the corrugated paper meets the requirements, the resulting corrugated paper has a higher and stronger impact resistance.

[0005] In the prior art, the quality inspection of corrugated paper is usually carried out after the corrugated paper is processed. This leads to the waste of raw materials and processing time if the quality of the corrugated paper is poor. Based on this, the present invention proposes a manufacturing process for impact-resistant and heat-insulating corrugated paper. Summary of the Invention

[0006] The purpose of this invention is to provide a manufacturing process for impact-resistant and heat-insulating corrugated paper, which obtains the state data of the raw paper. Specifically, by processing the anomalies in paper thickness, paper cracks, and paper integrity of the raw paper, the state value of the raw paper is obtained. The state value of the raw paper is then compared with a preset state value threshold to identify the quality of the raw paper. This effectively removes defective products during the preparation of corrugated paper and improves the processing quality of corrugated paper.

[0007] The technical problem solved by this invention is:

[0008] The objective of this invention can be achieved through the following technical solutions:

[0009] A manufacturing process for impact-resistant and heat-insulating corrugated paper includes the following steps:

[0010] Step 1: Prepare pulp by adding reinforcing agents to the pulp to obtain virgin paper;

[0011] Step 2: Heat-treat the raw paper and apply adhesive to its surface;

[0012] In this process, before applying glue to the raw paper, the state data of the raw paper is acquired, the state value of the raw paper is obtained by processing the state data, and the quality of the raw paper is identified based on the state value of the raw paper.

[0013] If the quality of the raw paper meets the preset raw paper quality requirements, then the raw paper is glued.

[0014] If the quality of the raw paper does not meet the preset requirements, then the preparation step one of the raw paper should be adjusted.

[0015] Step 3: The base paper is laminated using a corrugating machine to produce corrugated paper;

[0016] Step 4: After drying the corrugated paper, cool it to obtain impact-resistant and heat-insulating corrugated paper.

[0017] As a further aspect of the present invention: in step two, the state data of the original paper includes paper thickness anomalies, paper crack anomalies, and paper integrity anomalies.

[0018] As a further aspect of the present invention: the process of obtaining the state value of the original paper is as follows:

[0019] Outliers in paper thickness are denoted as Wi;

[0020] The paper crack anomaly is labeled as Li;

[0021] Outliers in paper integrity are marked as Zi;

[0022] Through formula The state value WLZ of the original paper is calculated, where a1, a2, and a3 are preset proportional coefficients, and a1, a2, and a3 are all greater than 0.

[0023] As a further aspect of the present invention: the process for obtaining paper thickness anomalies is as follows;

[0024] The original paper is divided into several paper units of equal area in a grid pattern;

[0025] Obtain the thickness value of the center point of the paper unit and record it as the thickness value of the paper unit. Mark the paper units whose thickness values ​​do not meet the original paper's preset thickness value as monitoring paper units.

[0026] The deviation of the thickness value of the monitored paper unit from the corresponding preset thickness value requirement is marked as the measured difference of the monitored paper unit;

[0027] The effect of the monitored paper unit on the thickness of the original paper is calculated by multiplying the measured difference of the monitored paper unit with the preset risk coefficient of the monitored paper unit.

[0028] As a further aspect of the present invention: the total thickness influence value of the monitored paper units on the original paper is obtained by summing the values ​​of the influence values ​​of all monitored paper units on the original paper thickness.

[0029] The risk impact value of each monitored paper unit is calculated by dividing the number of all monitored paper units by the total number of paper units.

[0030] The paper thickness anomaly value is obtained by numerically calculating the total thickness impact value of the monitored paper unit and the risk impact value of the monitored paper unit.

[0031] As a further aspect of the present invention: the process for obtaining paper crack anomalies is as follows:

[0032] The original paper is divided into several paper units of equal area in a grid pattern;

[0033] By identifying the crack data of paper units, the paper crack value, paper defect rate, and paper crack area are obtained.

[0034] The paper crack value is recorded as L1;

[0035] The paper defect rate is denoted as L2;

[0036] The area of ​​the paper crack is denoted as L3;

[0037] That is, through the formula The paper crack anisotropy was calculated, where, Preset scaling factor.

[0038] As a further aspect of the present invention: obtain the crack width value of each crack in each paper unit, sum the crack width values ​​of each crack in the paper unit and take the average value to obtain the crack value of the paper unit.

[0039] Obtain the crack values ​​of all paper units to get the crack value group of the paper unit;

[0040] The paper crack value is obtained by summing all crack values ​​within the crack value group of a paper unit and taking the average value.

[0041] As a further aspect of the present invention: the number of cracks in each paper unit is obtained, and paper units with a number of cracks exceeding a preset number of cracks in paper units are recorded as inferior paper units.

[0042] The paper defect rate is calculated by comparing the number of defective paper units with the total number of paper units.

[0043] As a further aspect of the present invention: the area of ​​the crack region in each paper unit is obtained, and the endpoints of adjacent branches of the same crack are connected sequentially within the paper unit to form a closed crack region.

[0044] Obtain the area of ​​the cracked region, sum the areas of all cracked regions in the paper unit, and get the area of ​​the cracked paper unit.

[0045] The total crack area of ​​the paper unit is obtained by summing the crack areas of all paper units.

[0046] As a further aspect of the present invention: the process for obtaining paper integrity anomalies is as follows:

[0047] The original paper is divided into several paper units of equal area in a grid pattern;

[0048] All paper units containing irregularities are categorized as incomplete paper units.

[0049] Obtain the center point of the incomplete paper unit and the center point of the original paper, and connect the center point of the incomplete paper unit with the center point of the original paper to obtain the incomplete through line.

[0050] Draw a circle with the midpoint of the incomplete through-line as the center and the distance from the midpoint of the incomplete through-line to the center point of the incomplete paper unit as the radius.

[0051] The paper unit that the area circle penetrates is recorded as a complete recognition unit;

[0052] Obtain the number of incomplete paper units within a complete recognition unit;

[0053] The paper integrity anomaly value is obtained by calculating the ratio of the number of incomplete paper units to the total number of complete recognition units.

[0054] The beneficial effects of this invention are as follows: This invention obtains the state data of the raw paper by processing the anomalies in paper thickness, paper cracks, and paper integrity to obtain the state value of the raw paper. The state value of the raw paper is obtained by dividing the raw paper into several paper units of equal area in a grid pattern, and identifying the thickness, cracks, and integrity of each paper unit. This allows the state value of the raw paper to be characterized from multiple dimensions with high accuracy. The state value of the raw paper is compared with a preset state value threshold to complete the identification of the quality of the raw paper. This effectively removes defective products during the preparation of corrugated paper and improves the processing quality of corrugated paper. Attached Figure Description

[0055] The invention will now be further described with reference to the accompanying drawings.

[0056] Figure 1 This is a flowchart of the manufacturing process of an impact-resistant and heat-insulating corrugated paper according to the present invention;

[0057] Figure 2 This is a flowchart of the signal recognition process for the preparation of raw paper in the manufacturing process of an impact-resistant and heat-insulating corrugated paper according to the present invention. Detailed Implementation

[0058] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0059] Please see Figures 1-2 As shown, this invention relates to a manufacturing process for impact-resistant and heat-insulating corrugated paper, comprising the following steps:

[0060] Step 1: Prepare pulp by adding reinforcing agents to the pulp to obtain virgin paper;

[0061] Step 2: Heat-treat the raw paper and apply adhesive to its surface;

[0062] In this process, before applying glue to the raw paper, the state data of the raw paper is acquired, the state value of the raw paper is obtained by processing the state data, and the quality of the raw paper is identified based on the state value of the raw paper.

[0063] If the quality of the raw paper meets the preset raw paper quality requirements, then the raw paper is glued.

[0064] If the quality of the raw paper does not meet the preset requirements, then the preparation step one of the raw paper should be adjusted.

[0065] Step 3: The base paper is laminated using a corrugating machine to produce corrugated paper;

[0066] Step 4: After drying the corrugated paper, cool it to obtain impact-resistant and heat-insulating corrugated paper.

[0067] The condition data of the raw paper includes paper thickness anomalies, paper crack anomalies, and paper integrity anomalies;

[0068] The original paper is divided into several paper units of equal area in a grid pattern;

[0069] The process for obtaining the paper thickness anomalies is as follows:

[0070] Obtain the thickness value of the center point of the paper unit and record it as the thickness value of the paper unit. Mark the paper units whose thickness values ​​do not meet the original paper's preset thickness value as monitoring paper units.

[0071] The deviation of the thickness value of the monitored paper unit from the corresponding preset thickness value requirement is marked as the measured difference of the monitored paper unit;

[0072] The preset risk coefficient of the monitoring paper unit is retrieved. It should be noted that the preset risk coefficient is always greater than zero. It is pre-entered and stored in the processor by the management personnel. The larger the value of the preset risk coefficient, the greater the impact of the deviation of the corresponding monitoring paper unit on the quality of the paper.

[0073] The effect of the monitored paper unit on the thickness of the original paper is calculated by multiplying the measured difference of the monitored paper unit with the preset risk coefficient of the monitored paper unit.

[0074] The total thickness influence of all monitored paper units on the original paper is calculated by summing the values ​​of their respective effects.

[0075] The risk impact value of each monitored paper unit is calculated by dividing the number of all monitored paper units by the total number of paper units.

[0076] The paper thickness anomaly Wi is obtained by numerically calculating the total thickness impact value Zhi of the monitored paper unit and the risk impact value Zfi of the monitored paper unit using the formula Wi=c1*Zhi+c2*Zfi. Here, c1 and c2 are preset weighting coefficients, and the values ​​of c1 and c2 are both greater than zero. Furthermore, the larger the paper thickness anomaly value Wi is, the greater the thickness deviation of the original paper's state data and the worse the quality of the original paper.

[0077] The process for obtaining paper crack anomalies is as follows:

[0078] Obtain the crack width value of each crack in each paper unit, sum the crack width values ​​of each crack in the paper unit and take the average value to obtain the crack value of the paper unit.

[0079] Obtain the crack values ​​of all paper units and organize them to obtain a crack value group for each paper unit.

[0080] The paper crack value is obtained by summing all crack values ​​within the crack value group of the paper unit and taking the average value.

[0081] Obtain the number of cracks in each paper unit, and record the paper units with more cracks than the preset number of cracks as inferior paper units;

[0082] The paper defect rate is calculated by comparing the number of all defective paper units with the total number of paper units.

[0083] Obtain the area of ​​the cracked region in each paper unit, and then connect the endpoints of the adjacent branches of the same crack within the paper unit to form a closed cracked region.

[0084] Obtain the area of ​​the cracked region, sum the areas of all cracked regions in the paper unit, and get the area of ​​the cracked paper unit.

[0085] The total crack area of ​​the paper is obtained by summing the crack areas of all paper units.

[0086] The paper crack value is recorded as L1;

[0087] The paper defect rate is denoted as L2;

[0088] The area of ​​the paper crack is denoted as L3;

[0089] That is, through the formula The paper crack anisotropy was calculated, where, Preset scaling factor;

[0090] The process for obtaining outlier values ​​for paper integrity is as follows:

[0091] All paper units containing irregularities are categorized as incomplete paper units.

[0092] Among them, the points already pointed out include the presence of holes, breaks, and defects on the paper;

[0093] Obtain the center point of the incomplete paper unit and the center point of the original paper, and connect the center point of the incomplete paper unit with the center point of the original paper to obtain the incomplete through line.

[0094] Draw a circle with the midpoint of the incomplete through-line as the center and the distance from the midpoint of the incomplete through-line to the center point of the incomplete paper unit as the radius.

[0095] The paper unit that the area circle penetrates is recorded as a complete recognition unit;

[0096] Obtain the number of incomplete paper units within a complete recognition unit;

[0097] The ratio of the number of incomplete paper units to the total number of complete recognition units is calculated to obtain the paper integrity anomaly value, which is then labeled as Zi;

[0098] That is, through the formula The state value WLZ of the original paper is calculated, where a1, a2, and a3 are preset proportional coefficients, and a1, a2, and a3 are all greater than 0.

[0099] The preset state value threshold of the raw paper is wlz. The state value of the raw paper WLZ is compared with the preset state value threshold wlz of the raw paper.

[0100] If the state value WLZ of the raw paper is less than or equal to the state value threshold wlz of the raw paper, it indicates that the raw paper preparation is unqualified and an abnormal signal of raw paper preparation is obtained.

[0101] If the state value WLZ of the raw paper is greater than the state value threshold wlz of the raw paper, it indicates that the raw paper preparation is qualified, and a raw paper preparation qualified signal is obtained.

[0102] Based on the abnormal signals in the preparation of raw paper, the preparation process of raw paper in step one is adjusted to improve the yield of raw paper.

[0103] Based on the qualified signal of the raw paper preparation, the raw paper is glued and further processed to improve the processing quality of corrugated paper.

[0104] Working principle: It obtains the state data of the raw paper, that is, by processing the paper thickness anomaly, paper crack anomaly, and paper integrity anomaly of the raw paper, the state value of the raw paper is obtained. The state value of the raw paper is compared with the preset state value threshold of the raw paper to complete the identification of the quality of the raw paper. This can effectively remove defective products in the corrugated paper manufacturing process and improve the processing quality of corrugated paper.

[0105] Secondly, in this solution, the state value of the original paper is obtained by dividing the original paper into several paper units of equal area in a grid pattern, and identifying the thickness, cracks and integrity of each paper unit. This allows the state value of the original paper to be characterized through multiple dimensions, resulting in high accuracy.

[0106] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A process for making an impact-resistant, thermally insulated corrugated paper, characterized in that, The method comprises the following steps: Step 1: preparing paper pulp, adding a reinforcing agent to the paper pulp to obtain a raw paper sheet; Step 2: heat treating the raw paper sheet and performing a sizing treatment on the surface of the raw paper sheet; Before sizing the raw paper sheet, the state data of the raw paper sheet is obtained, the state value of the raw paper sheet is obtained by processing the state data of the raw paper sheet, and the quality of the raw paper sheet is identified based on the state value of the raw paper sheet; If the quality of the raw paper sheet meets the preset quality requirement of the raw paper sheet, the raw paper sheet is sized; If the quality of the raw paper sheet does not meet the preset quality requirement of the raw paper sheet, the first step of preparing the raw paper sheet is adjusted; Step 3: compounding the raw paper sheet by a corrugating machine to obtain corrugated paper; Step 4: drying and cooling the corrugated paper to obtain the impact-resistant and heat-insulating corrugated paper; The state value of the raw paper sheet is obtained by: Marking the paper thickness anomaly value as Wi; Marking the paper crack anomaly value as Li; Marking the paper integrity anomaly value as Zi; The state value WLZ of the original paper sheet is calculated by the formula wherein a1, a2, and a3 are preset proportion coefficients, and a1, a2, and a3 are all greater than 0. The paper integrity anomaly value is obtained by: Dividing the raw paper sheet into a plurality of equal-area paper units in a grid shape; Marking the paper units with anomalies as non-intact paper units; Obtaining the center point of the non-intact paper unit and the center point of the raw paper sheet, connecting the center point of the non-intact paper unit with the center point of the raw paper sheet to obtain a non-intact through line; Taking the midpoint of the non-intact through line as the center of a region circle, and taking the distance from the midpoint of the non-intact through line to the center point of the non-intact paper unit as the radius to draw the region circle; Marking the paper units penetrated by the region circle as intact identification units; Obtaining the number of non-intact paper units in the intact identification units; Calculating the ratio of the number of non-intact paper units to the total number of intact identification units to obtain the paper integrity anomaly value.

2. The process for making an impact-resistant, thermally insulated corrugated paper according to claim 1, characterized in that, In step 2, the state data of the raw paper sheet includes the paper thickness anomaly value, the paper crack anomaly value, and the paper integrity anomaly value.

3. The process for making an impact-resistant, thermally insulated corrugated paper according to claim 1, characterized in that, The paper thickness anomaly value is obtained by: Dividing the raw paper sheet into a plurality of equal-area paper units in a grid shape; Obtaining the thickness value of the center point of the paper unit, marking it as the thickness value of the paper unit, and marking the paper unit whose thickness value does not meet the preset thickness value requirement of the raw paper sheet as a monitoring paper unit; Comparing the thickness value of the monitoring paper unit with the corresponding preset thickness value requirement to obtain the measured difference value of the monitoring paper unit; Calculating the product of the measured difference value of the monitoring paper unit and the preset risk coefficient of the monitoring paper unit to obtain the thickness influence value of the monitoring paper unit on the raw paper sheet.

4. The process for making an impact-resistant, thermally insulated corrugated paper according to claim 3, characterized in that, Summing up the thickness influence values of all monitoring paper units to obtain the total thickness influence value of the monitoring paper unit; Calculating the ratio of the number of monitoring paper units to the total number of paper units to obtain the risk influence value of the monitoring paper unit; Numerically calculating the total thickness influence value of the monitoring paper unit and the risk influence value of the monitoring paper unit to obtain the paper thickness anomaly value.

5. The process for making an impact-resistant, thermally insulated corrugated paper according to claim 1, characterized in that, The paper crack anomaly value is obtained by: Dividing the raw paper sheet into a plurality of equal-area paper units in a grid shape; Obtaining the paper crack value, the paper defect rate, and the paper crack area by identifying the crack data of the paper unit; Marking the paper crack value as L1; The paper defect rate is recorded as L2; The paper crack area is recorded as L3; The crack abnormal value of the paper is calculated by the formula wherein, a preset proportion coefficient.

6. The process for making an impact-resistant, thermally insulated corrugated paper according to claim 5, characterized in that, Obtain the crack width value of each crack in each paper unit, sum the crack width value of each crack in the paper unit, and take the average, i.e. the crack value of the paper unit is obtained; Obtain the crack value of all paper units to obtain the crack value group of the paper unit; Sum all the crack values in the crack value group of the paper unit and take the average to obtain the paper crack value.

7. The process for making an impact-resistant, thermally insulated corrugated paper according to claim 5, characterized in that, Obtain the number of cracks in each paper unit, and record the paper unit whose number of cracks exceeds the preset number of cracks of the paper unit as a defective paper unit; Calculate the ratio of the number of all defective paper units to the total number of paper units to obtain the paper defect rate.

8. The process for making an impact-resistant, thermally insulated corrugated paper according to claim 5, characterized in that, Obtain the crack area in each paper unit, obtain the same crack according to the end point of each branch in the paper unit, sequentially connect the end points of adjacent branches of the same crack to form a closed crack area; Obtain the crack area of the crack area, sum all the crack area in the paper unit to obtain the paper unit crack area; Sum the paper unit crack area of all paper units to obtain the paper crack area.

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