High-tensile paper adhesive tape for sealing box

Abstract

The invention relates to a high-tensile paper adhesive tape for box sealing, belongs to the technical field of box sealing adhesive tapes, and provides a preparation method of the high-tensile paper adhesive tape for box sealing in order to provide a box sealing with high tensile strength, the preparation method comprises the following steps: 1, making paper; 2, seepage prevention / silicon coating; 3, gluing; 4, cutting; the paper adhesive tape provided by the scheme has the advantages that 1, the base paper quantification is improved, the proportion of long-fiber paper pulp is improved, the tensile strength is improved, and the paper adhesive tape is environment-friendly and easy to degrade; the packaging box can bear the box sealing load-bearing requirement of 15 kilograms of goods, and a sealing opening is not cracked after the packaging box falls 10 times from the height of 0.76 m. 2, the box sealing viscidity is good, the sealing is firm, and the warping is avoided; 3, the adhesive has relatively strong viscosity and relatively good cohesive force; by adopting solvent type rubber glue and adding a curing agent, the viscosity and cohesion of the adhesive tape are improved.

Description

Technical Field

[0001] This case belongs to the technical field of sealing tapes, and specifically relates to a high-tensile paper tape. Background Art

[0002] Paper tapes are quite common, and their main uses are for decoration, spraying, shielding, and protection; due to the characteristics of paper tapes, they are easily degradable and have a high recycling rate; they are also used for sealing boxes, but because the paper tapes sold on the market currently have a low tensile strength and are only suitable for sealing boxes of light items (<3 kg), it is very difficult to meet the sealing load requirements for slightly heavier items (over 10 kg). During transportation, the sealed openings will crack. Because of their poor universality for sealing boxes, they are less used for sealed packaging.

[0003] To solve this problem, environmental protection and degradability are also the development trends in the express packaging industry. Develop a paper-based sealing tape with a relatively high tensile strength. This tape has good tensile strength, can meet the sealing load requirements for goods over 15 kg, does not warp or crack, is suitable for sealing most goods, and is environmentally friendly and degradable. Summary of the Invention

[0004] To overcome the problems mentioned above, the purpose of this case is to provide a high-tensile paper tape suitable for sealing boxes and a preparation method.

[0005] A preparation method of a high-tensile paper tape for sealing boxes, the preparation method includes the following steps:

[0006] I. Papermaking

[0007] 1.1. Feed softwood pulp board and hardwood pulp board with a weight ratio of 80 - 85:15 - 20 into a pulper, and then add wet strength agent, fiber reinforcing agent, flow aid, dispersant, and defoamer. The addition amounts per ton of paper are 50 - 60K, 15 - 20 Kg, 0.1 - 0.3 Kg, 0.1 - 0.4 Kg, and 2 - 4 Kg respectively. First beat the pulp and then stir until it is in a uniform state;

[0008] When beating the pulp, the rotational speed is 630 - 660 revolutions per minute, the time is 55 - 65 minutes, and the temperature is 40 - 43 °C; and / or when stirring, the rotational speed is 690 - 710 revolutions per minute, the beating time is 40 - 50 minutes, and the temperature is 40 - 45 °C.

[0009] Preferably, the weight ratio of softwood pulp board to hardwood pulp board is 80:20.

[0010] 1.2. Continue to grind the pulp and stir; when grinding the pulp, the rotational speed is 690 - 710 revolutions per minute, the time is 60 - 70 minutes, and the temperature is 47 - 52 °C; and / or when stirring, the rotational speed is 840 - 860 revolutions per minute, the beating time is 40 - 50 minutes, and the temperature is 40 - 45 °C.

[0011] 1.3. Then, form it on the wire, press / crinkle, dry, and wind it up. Finally, the basis weight of the base paper is maintained at 85 ± 1 g / ㎡.

[0012] The wire forming speed is 145 - 155 revolutions per minute, the time is 50 - 60 minutes, and the temperature is 45 - 50 °C.

[0013] The press and crinkling speed is 140 - 145 revolutions per minute, the time is 45 - 55 minutes, and the temperature is 40 - 45 °C.

[0014] The dryer cylinder speed is 110 - 120 revolutions per minute, the time is 45 - 55 minutes, and the temperature is 80 - 110 °C.

[0015] The winding speed is 115 - 125 revolutions per minute, the time is 45 - 55 minutes, and the temperature is 20 - 40 °C.

[0016] II. Anti-seepage / silicon coating: Impregnate the base paper, then coat the anti-seepage paper with a release agent, and let it stand for 4 - 5 days after coating the release agent to cure the silicon paper.

[0017] III. Glue coating: Add 0.4 - 0.7% of amino curing agent based on the weight of the glue before coating the glue, then coat the glue. The glue amount is controlled between 40 - 48 g / ㎡, the coating speed of the machine is 80 - 90 meters per minute, and the unwind tension is controlled at 0.8 - 1.5 Kgf.

[0018] The paper coated with glue enters the oven for drying. There are a total of 13 sections of the oven. The temperature control of the 1st to 13th sections of the oven is 80 ± 5 °C, 90 ± 5 °C, 100 ± 5 °C, 110 ± 5 °C, 110 ± 5 °C, 120 ± 5 °C, 125 ± 5 °C, 125 ± 5 °C, 130 ± 5 °C, 120 ± 5 °C, 90 ± 5 °C, 80 ± 5 °C, 60 ± 5 °C in sequence. The drying speed of the machine is 80 - 90 meters per minute. After the glue is dried, it is sent to the winding rack for winding. The winding tension is controlled at 20 - 25 Kgf; the dryness is controlled between 3 - 6%.

[0019] The said is a solvent-based rubber glue, and the glue material ratio is as follows by mass parts:

[0020]

[0021]

[0022] The glue viscosity value is between 160000 - 200000, and the solid content is 45% ± 2.

[0023] IV. Cutting: Rewind and slit the mother roll coated with glue to obtain the finished tape.

[0024] The present invention also provides a high tensile strength paper tape prepared by the above preparation method.

[0025] The paper tape provided in this case has the following characteristics: 1. The invention improves the base paper weight, increases the ratio of long fiber pulp, increases tensile strength, is environmentally friendly and easy to degrade; it can withstand the load-bearing requirements of 15 kg cargo sealing, and can fall from a height of 0.76 meters 10 times without cracking the seal. 2. The sealing has good adhesion, and the seal is firm and does not warp. 3. The adhesive has strong adhesion and good cohesion; solvent-based rubber glue is used, and a curing agent is added to improve the adhesive tape's adhesion and cohesion. Specific embodiments

[0026] 1. Papermaking

[0027] 1.1. Raw paste ingredients

[0028] According to the raw material ratio table in Table 1, 8 tons of pulp material is prepared in total; the raw pulp board is sent to the pulper.

[0029] Table 1 Raw material ratio table

[0030] Raw materials Weight ratio Typical value Dosage in this embodiment Dosage of softwood pulp 80-85％ 82％ 6.56 tons Dosage of hardwood pulp 15-20％ 18％ 1.44 tons

[0031] Add additives according to the additive ratio in Table 2.

[0032] Table 2 Additive ratio table

[0033]

[0034]

[0035] The wet strength agent is SQJ1 from Hangzhou Hanghua Harima Chemical Co., Ltd.; the fiber reinforcement and defoaming agent are produced by Shandong Main Chemical Co., Ltd., the dispersant is produced by Xinyue (Tianjin) Practicing Co., Ltd., and the flow aid is produced by Shandong Lanwan Materials Co., Ltd.

[0036] 1.2. Beating

[0037] According to the production process in Table 3, put the pulp into the pulping machine to break up / crush and mix evenly.

[0038] Table 3 Pulping production process

[0039] Item Rotation speed (rpm) Duration Temperature control (°C) Beating (pulping) 650 / min 60 minutes 40-43 Stirring 700 / min 40 - 50 minutes 40-45

[0040] 1.3. Refining

[0041] The crushed and stirred slurry was ground according to Table 4.

[0042] Table 4 Pulping production process

[0043] Item Rotation speed (rpm) Duration Temperature (°C) Refining 700 60 - 70 minutes 47-52 Stirring 850 40 - 50 minutes 40-45

[0044] 1.4. Online forming - pressing / wrinkling - drying - rolling

[0045] Complete it once on the paper machine according to the production process table of Paper Machine No. 5, and keep the basis weight of the base paper at 85 ± 1 g / ㎡.

[0046] Production Process Table of Paper Machine No. 5

[0047]

[0048]

[0049] II. Anti-seepage / Silicone Coating

[0050] Impregnate the base paper to increase the permeability or dyeing effect of the paper; then coat the anti-seepage paper with a release agent (for easy unwinding), and complete it in one step; after coating the release agent, let it stand for 4 - 5 days to cure the silicone paper.

[0051] III. Glue Preparation

[0052] In this embodiment, a solvent-based rubber glue with good weather resistance is used, and the material ratio of the glue is as follows by mass:

[0053]

[0054] The viscosity value of the glue is between 160,000 - 200,000, and the solid content is 45% ± 2.

[0055] IV. Glue Coating

[0056] The glue is coated by means of knife coating on the coating surface of the paper. Before coating, add 0.4 - 0.7% of amino curing agent based on the weight of the glue to improve the cohesion of the glue molecular chain (enhance the holding viscosity). The glue amount is controlled between 40 - 48 g / ㎡, the coating speed of the machine is 80 - 90 m / min, and the unwinding tension is controlled at 0.8 - 1.5 Kgf.

[0057] The paper coated with glue enters the oven for drying. There are 13 sections of ovens in total. The temperature of the 1st to 13th sections of ovens is controlled successively at 80 ± 5℃, 90 ± 5℃, 100 ± 5℃, 110 ± 5℃, 110 ± 5℃, 120 ± 5℃, 125 ± 5℃, 125 ± 5℃, 130 ± 5℃, 120 ± 5℃, 90 ± 5℃, 80 ± 5℃, 60 ± 5℃. The drying speed of the machine is 80 - 90 m / min. After the glue is dried, it is sent to the rewinding rack for rewinding, and the rewinding tension is controlled at 20 - 25 Kgf; the dryness is controlled between 3 - 6%.

[0058] V. Cutting

[0059] The master roll coated with glue is rewound and slit to obtain the finished tape.

[0060] Performance Test

[0061]

[0062]

Claims

1. A preparation method of a high-tensile paper tape for sealing boxes, characterized in that, The described preparation method comprises the following steps: I. Papermaking 1.1 Feed softwood pulp board and hardwood pulp board with a weight ratio of 80 - 85:15 - 20 into a pulper, and then add wet strength agent, fiber reinforcing agent, flow aid, dispersant and defoamer. The addition amounts per ton of paper are 50 - 60 K, 15 - 20 Kg, 0.1 - 0.3 Kg, 0.1 - 0.4 Kg and 2 - 4 Kg respectively. First, beat the pulp and then stir until it reaches a uniform state; 1.2 Continue to grind and stir the pulp; 1.3 Then form it on the wire, press / crinkle, dry and wind up. Finally, the basis weight of the base paper is maintained at 85 ± 1 g / ㎡; II. Anti - seepage / silicon coating: Immerse the base paper, and then coat the anti - seepage paper with a release agent. After coating the release agent, let it stand for 4 - 5 days to cure the silicon paper; III. Glue coating: Add 0.4 - 0.7% of amino curing agent based on the weight of the glue before glue coating, and then coat the glue. The glue amount is controlled between 40 - 48 g / ㎡, the coating speed of the machine is 80 - 90 m / min, and the unwind tension is controlled at 0.8 - 1.5 Kgf; Then dry it; IV. Cutting: Rewind and slit the mother roll coated with glue to obtain the finished tape.

2. The preparation method of the high-tensile paper tape for sealing boxes according to claim 1, characterized in that, In step 1.1, when beating the pulp, the rotation speed is 630 - 660 rpm, the time is 55 - 65 minutes, and the temperature is 40 - 43℃; and / or when stirring, the rotation speed is 690 - 710 rpm, the stirring time is 40 - 50 minutes, and the temperature is 40 - 45℃.

3. The preparation method of the high-tensile paper tape for sealing boxes according to claim 1, characterized in that, In step 1.2, when grinding the pulp, the rotation speed is 690 - 710 rpm, the time is 60 - 70 minutes, and the temperature is 47 - 52℃; and / or when stirring, the rotation speed is 840 - 860 rpm, the stirring time is 40 - 50 minutes, and the temperature is 40 - 45℃.

4. The preparation method of the high-tensile paper tape for sealing boxes according to claim 1, characterized in that, In step 1.3, the rotation speed for forming on the wire is 145 - 155 rpm, the time is 50 - 60 minutes, and the temperature is 45 - 50℃; and / or the rotation speed for pressing and wrinkling is 140 - 145 rpm, the time is 45 - 55 minutes, and the temperature is 40 - 45℃; and / or the rotation speed of the drying cylinder is 110 - 120 rpm, the time is 45 - 55 minutes, and the temperature is 80 - 110℃; and / or the rotation speed for winding up is 115 - 125 rpm, the time is 45 - 55 minutes, and the temperature is 20 - 40℃.

5. The preparation method of the high-tensile paper tape for sealing boxes according to claim 1, characterized in that, In step (III), the paper coated with glue enters the oven for drying. There are 13 sections of ovens in total. The temperature control of the 1st to 13th sections of ovens is 80 ± 5℃, 90 ± 5℃, 100 ± 5℃, 110 ± 5℃, 110 ± 5℃, 120 ± 5℃, 125 ± 5℃, 125 ± 5℃, 130 ± 5℃, 120 ± 5℃, 90 ± 5℃, 80 ± 5℃, 60 ± 5℃ respectively. The drying speed of the machine is 80 - 90 m / min. After the glue is dried, it is sent to the winding rack for winding up. The winding tension is controlled at 20 - 25 Kgf; the dryness is controlled between 3 - 6%.

6. The preparation method of the high-tensile paper tape for sealing boxes according to claim 1, characterized in that, The weight ratio of softwood pulp board and hardwood pulp board is 80:

20.

7. The preparation method of the high-tensile paper tape for sealing boxes according to claim 1, characterized in that, The described is a solvent - type rubber glue, and the material ratio of the glue is as follows by mass: Solvent 65 - 70 parts, Milled rubber 112 28 - 33 parts, Petroleum resin C5 4 - 6 parts, Antioxidant 168 1.0 - 1.5 parts, 0.7 to 1.3 parts of naphthenic oil, The viscosity value of the glue is between 160,000 and 200,000, and the solid content is 45% ± 2.

8. A high-tensile paper tape prepared by the method for preparing a high-tensile paper tape for sealing boxes according to any one of claims 1-7.

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