Manufacturing method of anti-counterfeiting glass packing paper

Abstract

The invention discloses a manufacturing method of anti-counterfeiting glass packing paper. The manufacturing method comprises the following steps: (1) controlling the water content of paper pulp to be 35-38%; (2) the paper pulp is cut through a circular knife flywheel, a trace line is cut on the paper pulp in the mode that the circular knife flywheel is pressed downwards and rotates, and the depth of the trace line is 1 / 3-1 / 2 of the thickness of the paper pulp; and (3) sequentially carrying out three squeezing procedures to squeeze out water in the paper pulp, and shrinking and narrowing the trace lines cut on the paper pulp to obtain the glass packing paper with the trace lines. The paper pulp is cut to manufacture the anti-counterfeiting glass packing paper, most of fibers on the manufactured anti-counterfeiting trace line have cutting traces, one end of each fiber is cut by a circular cutter wheel to present the unique characteristic of a cut broken end, and a new technical approach for realizing an original anti-counterfeiting method is added. According to the method, the anti-counterfeiting effect of the glass packing paper can be improved, and the production cost is reduced, so that the market competitiveness of products is improved.

Description

Technical Field

[0001] The invention relates to the technical field of anti-counterfeiting glass pad paper, and in particular to a method for manufacturing anti-counterfeiting glass pad paper. Background Art

[0002] Glass padding paper is used to pack glass during storage and transportation, which can effectively prevent glass from getting moldy. Some unscrupulous merchants often produce counterfeit brand-name products to fish in troubled waters, which seriously damages the reputation and economic interests of genuine companies. In order to prohibit or eliminate the counterfeiting behavior of unscrupulous elements, paper anti-counterfeiting technology has been a topic of research.

[0003] At present, the common anti-counterfeiting method of glass pad paper is to paste anti-counterfeiting laser labels on the packaging, or add colored fibers into the paper. However, since the production cost of laser labels is low and they are pasted on the outer packaging, they are easy to imitate; there are many manufacturers of colored fibers, and illegal merchants can obtain them through various channels. Since the process of adding colored fibers into paper is simple and easy to make, the anti-counterfeiting effect is not ideal. In addition, although the use of special anti-counterfeiting watermarks and the addition of metal security lines can play a good anti-counterfeiting role, their production and processing processes are complex and the cost is high, which increases the cost and weakens the market competitiveness of products. There are also line anti-counterfeiting methods that use liquids (mainly water) dispensed by high-precision needle nozzles with or without additives, in which the additives are colored or phosphorescent by adding suitable substances. Line traces may also appear at the same or different intervals. In addition, if the spraying device moves transversely to the running direction of the paper machine, the line traces will appear rippled, but this method requires a high-precision needle nozzle device and increases the cost of processing drying water in the papermaking process.

[0004] The present invention is proposed based on the problem that the existing anti-counterfeiting methods of glass pad paper either have poor anti-counterfeiting effects, or affect the hygroscopicity and mildew resistance of paper to varying degrees, or reduce the market competitiveness of products due to increased production costs. Summary of the invention

[0005] The object of the present invention is to provide a method for manufacturing anti-counterfeiting glass pad paper, which can not only improve the anti-counterfeiting effect of the glass pad paper without affecting the physical properties of the finished paper, but also reduce the production cost, thereby improving the market competitiveness of the product.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A method for manufacturing anti-counterfeiting glass pad paper comprises the following steps:

[0008] (1) Control the moisture content of pulp to 35%-38% (by mass percentage);

[0009] (2) Cut a trace line on the pulp, the depth of the trace line is 1 / 3-1 / 2 of the thickness of the pulp;

[0010] (3) Three pressing processes are performed in sequence to squeeze out the water in the pulp, and the trace lines cut on the pulp shrink and become narrower, thereby obtaining glass pad paper with trace lines.

[0011] Preferably, in step (2), a circular knife wheel is used to cut the pulp, and the trace line is cut on the pulp by pressing down and rotating the circular knife wheel.

[0012] Furthermore, the depth of the circular knife wheel entering the pulp is controlled by adjusting the upper and lower positions of the circular knife wheel through a positioning device, wherein the positioning device comprises a round bar, a threaded rod, a turntable and a fulcrum frame, wherein the middle part of the round bar is supported by the fulcrum frame, one end of the round bar is connected to the central axis of the circular knife wheel, and the other end is connected to the threaded rod; the turntable controls the lifting and lowering of the threaded rod; when the threaded rod rises, the position of the circular knife wheel drops; when the threaded rod drops, the position of the circular knife wheel rises.

[0013] Furthermore, the diameter of the circular cutter wheel is 200-300 mm, the width of the blade is 0.1-1.5 mm, and the angle formed by the two surfaces of the circular cutter wheel and the blade is 3-10°.

[0014] Furthermore, in step (3), the three pressing processes respectively use upper and lower pressing rollers to apply pressure to the paper to squeeze out moisture, wherein the pressure applied in the first pressing process is in the range of 4.5-4.9 MPa, the pressure applied in the second pressing process is in the range of 5-5.9 MPa, and the pressure applied in the third pressing process is in the range of 6-6.5 MPa.

[0015] Beneficial effects of the present invention:

[0016] The present invention manufactures anti-counterfeiting glass pad paper by cutting pulp. Most of the fibers on the manufactured anti-counterfeiting trace line have cutting marks, and one end of each fiber has a unique feature of being cut off after being cut by a circular knife wheel, thereby adding a new technical approach to the original anti-counterfeiting method.

[0017] The method of the present invention neither affects the physical properties of the finished paper, such as the appearance flatness, thickness and width, nor affects the intrinsic indicators of the paper, such as the hygroscopicity, pH value and antistatic ability; when each batch of paper products is produced, the batch of paper products with trace anti-counterfeiting marks can be formed by controlling the position, depth, width and number of the trace lines on the paper, which does not reduce the production efficiency and is convenient to implement and easy to control. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the device for cutting pulp in the method of the present invention. DETAILED DESCRIPTION

[0019] The present invention is further described below by way of examples, but these examples are not intended to limit the scope of protection of the present invention.

[0020] The invention adopts a circular knife wheel to cut a groove for pulp within a certain water content range and then uses three presses to dry the pulp to produce a mark on paper, so that the paper product with the mark becomes a paper product with anti-counterfeiting function.

[0021] In the present invention, a circular knife wheel is used to cut the pulp, and a trace line is cut on the pulp by pressing down and rotating the circular knife wheel. Figure 1 As shown, the central axis of the circular cutter wheel 1 is stuck in the groove at the upper end of the support frame 7, and the central axis of the circular cutter wheel 1 can move up and down in the groove, and the central axis of the circular cutter wheel 1 is connected to the adjustment device for adjusting the upper and lower positions of the circular cutter wheel. The adjustment device includes a round bar 5, a fulcrum frame 2, a threaded rod 3, a turntable 4 and a bracket 8. One end of the round bar 5 is connected to the central axis of the circular cutter wheel, and the other end is fixedly connected to one end of the threaded rod 3. The middle part is supported by the fulcrum of the fulcrum frame 2, and the two ends of the round bar 5 can swing up and down around the fulcrum; the turntable 4 is set at the other end of the threaded rod 3, and the rotation of the turntable 4 can control the lifting and lowering of the threaded rod 3. In this way, the weight of the circular cutter wheel 1 is borne by the round bar 5, and the upper and lower positions of the circular cutter wheel 1 are regulated by rotating the turntable 4 to control the lifting and lowering of the threaded rod 3. When the turntable 4 is rotated to make the threaded rod 3 rise, one end of the round bar 5 connected to the threaded rod 3 rises, and the other end of the round bar 5 connected to the circular cutter wheel 1 falls, so that the position of the circular cutter wheel 1 falls; when the turntable 4 is rotated to make the threaded rod 3 fall, one end of the round bar 5 connected to the threaded rod 3 falls, and the other end of the round bar 5 connected to the circular cutter wheel 1 rises, so that the position of the circular cutter wheel 1 rises. Thus, the pulp fibers are cut by the rotation of the circular cutter wheel, and the depth of the circular cutter wheel entering the pulp 6 is controlled by the positioning device.

[0022] The diameter of the circular cutter wheel is 200-300mm, the width of the blade is 0.1-1.5mm, the angle between the two sides of the circular cutter wheel and the blade is 3-10°, and the blade must be sharpened. The width of the circular cutter wheel blade can control the width of the groove produced by cutting pulp, the position of the circular cutter wheel controls the position of the groove on the paper, and the number of circular cutter wheels controls the number of grooves. Adding one circular cutter wheel will add one groove.

[0023] When each batch of paper products is produced, the paper products with groove trace anti-counterfeiting marks are formed by controlling the position, depth, width and number of grooves on the paper. Each batch of paper can have a combination of position, depth, width and number of grooves on the paper. The position, depth, width and number of grooves on the paper of different batches are also different, so that counterfeiters cannot counterfeit the products of this batch.

[0024] Through experimental research, it is found that the circular knife wheel used in the present invention can smoothly cut the pulp when the water content of the pulp is in the range of 35-38%. When the water content of the pulp is lower than 35%, the processing cost will be increased due to the reduction of the water content of the pulp in the previous process. When the water content of the pulp is higher than 38%, the circular knife wheel cannot smoothly cut the fibers in the pulp, and cannot form a clear groove trace line, and there are many irregular or long or short breakpoints.

[0025] The circular knife wheel blade is extended into the pulp with a moisture content of 35%-38% through the up and down position of the circular knife wheel. When the circular knife wheel rotates with the pulp, a groove will be cut on the pulp. The pulp with a groove enters the press section of the paper machine and needs to go through three presses. The groove will show a certain degree of narrowing and shallowing, which will not affect the physical properties of the finished paper such as appearance flatness, thickness and width, nor the intrinsic indicators of the paper such as hygroscopicity, pH and antistatic ability. If one press is missing, the physical properties of the finished paper such as appearance flatness and width will be affected, and the intrinsic indicators such as hygroscopicity, pH and antistatic ability of the paper will also be reduced.

[0026] Table 1 shows the optimization results of key technical parameters in the manufacturing method of the present invention.

[0027] Table 1

[0028]

[0029] The present invention uses a circular knife wheel to cut into the pulp and produces a trace after three pressings. Compared with the anti-counterfeiting method of the line trace produced by the liquid (mainly water) distributed by a high-precision needle nozzle with or without adding additives (comparison method), on the one hand, the technical methods used are obviously different. On the other hand, the present invention uses a circular knife wheel to cut into the pulp. Most of the fibers on the line of the trace produced after three pressings have cutting marks, and one end has the unique feature of being cut off after being cut by the circular knife wheel. In the anti-counterfeiting line trace of the comparison method, both ends of the fibers are natural, and there is no feature of being cut off at one end.

[0030] Example

[0031] The device used in this embodiment is composed of Figure 1 As shown, the diameter of the circular knife wheel is 200mm, the material is stainless steel, the width of the blade is 1mm, the angle formed by the two sides of the circular knife wheel and the blade is 5°, the blade is sharp, and the up and down position of the circular knife wheel is adjusted by a hand-controlled turntable. The diameter of the round bar 5 is 0.7mm, the length is 1m, and the material is stainless steel. The diameter of the threaded rod 3 is 80mm, the length is 260m, and the material is stainless steel. The diameter of the turntable 4 is 240mm and the material is stainless steel. The height of the bracket 8 is 280mm and the material is stainless steel. The height of the fulcrum frame 2 is 240mm and the material is stainless steel.

[0032] The manufacturing process of anti-counterfeiting glass pad paper includes the following steps:

[0033] (1) Control the moisture content of pulp to 36%;

[0034] (2) Cut a trace line on the pulp, the depth of the trace line is 1 / 2 of the pulp thickness;

[0035] (3) Three pressing steps are performed in sequence: the first pressing step is that two pressing rollers apply pressure to the paper to squeeze out moisture, and the applied pressure is 4.5 MPa; the second pressing step is that another two pressing rollers continue to apply pressure to the paper to squeeze out moisture, and the applied pressure is 5.9 MPa; the third pressing step is that two pressing rollers continue to apply pressure to the paper to squeeze out moisture, and the applied pressure is 6 MPa, to obtain glass pad paper with trace lines, and the displayed width of the trace lines on the paper surface is about 0.7 mm.

[0036] Repeated tests have shown that the method of the present invention does not affect the physical properties of the finished paper, such as the appearance flatness, thickness and width, nor does it affect the intrinsic indicators of the paper, such as the hygroscopicity, pH value and antistatic ability. When each batch of paper products is produced, the position, depth, width and number of the trace lines on the paper can be controlled to form the paper products with the trace anti-counterfeiting mark, which does not reduce the production efficiency, is convenient to implement and easy to control.

Claims

1. A method for manufacturing anti-counterfeiting glass pad paper, characterized in that: The following steps are involved: (1) Control the moisture content of pulp to 35%-38%; (2) Cut a trace line on the pulp, the depth of the trace line is 1 / 3-1 / 2 of the thickness of the pulp; (3) Three pressing processes are performed in sequence to squeeze out the water in the pulp, and the trace lines cut on the pulp shrink and become narrower, thereby obtaining glass pad paper with trace lines.

2. The method for manufacturing anti-counterfeit glass pad paper according to claim 1, characterized in that: In the step (2), the pulp is cut using a circular knife wheel, and a trace line is cut on the pulp by pressing down and rotating the circular knife wheel.

3. The method for manufacturing anti-counterfeit glass pad paper according to claim 2, characterized in that: The depth of the circular knife wheel entering the pulp is controlled by adjusting the up and down position of the circular knife wheel through a positioning device. The positioning device comprises a round bar, a threaded rod, a turntable and a fulcrum frame. The middle part of the round bar is supported by the fulcrum frame, one end of the round bar is connected to the central axis of the circular knife wheel, and the other end is connected to the threaded rod; the turntable controls the lifting and lowering of the threaded rod; when the threaded rod rises, the position of the circular knife wheel drops; when the threaded rod drops, the position of the circular knife wheel rises.

4. The method for manufacturing anti-counterfeit glass pad paper according to claim 2 or 3, characterized in that: The diameter of the circular knife wheel is 200-300 mm, and the width of the blade is 0.1-1.5 mm.

5. The method for manufacturing anti-counterfeit glass pad paper according to claim 4, characterized in that: The angle formed by the two sides of the circular knife wheel and the blade is 3 to 10°.

6. The method for manufacturing anti-counterfeit glass pad paper according to claim 1, characterized in that: In step (3), the three pressing processes respectively use upper and lower pressing rollers to apply pressure to the paper to squeeze out moisture, wherein the pressure applied in the first pressing process is in the range of 4.5-4.9 MPa, the pressure applied in the second pressing process is in the range of 5-5.9 MPa, and the pressure applied in the third pressing process is in the range of 6-6.5 MPa.

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