Quick-dry tape core for correction tape and preparation method of quick-dry tape core

Abstract

The invention provides a quick-dry tape core for a correction tape and a preparation method of the quick-dry tape core, a tape core coating sequentially comprises a substrate layer, a covering layer and an adhesive layer, and the quick-dry property is improved by adding specific plant-based filler into the covering layer. The plant-based filler with excellent water absorption is introduced into the formula, so that the drying time of the ink on the correction tape is remarkably shortened; an original covering layer formula system and an original manufacturing process are not changed, a new process or equipment is not needed, and operation is easy and convenient; in addition, the plant-based filler can adjust the color of the covering layer to be closer to that of paper, and the eye protection effect is achieved.

Description

Technical Field

[0001] This invention relates to the field of correction tape technology, specifically to a quick-drying tape core for correction tape and its preparation method. Background Technology

[0002] Correction tape is a white, opaque ink similar to correction fluid. It is applied to paper to cover up mistakes, allowing for immediate rewriting. Its advantages are significant: it is quick and convenient, allowing for immediate writing; it is clean and environmentally friendly, leaving no odor or residue; it is small and lightweight, making it easy to carry; and it provides strong coverage, ensuring that corrections are not visible in photocopies or faxes. However, the ink on correction tape takes much longer to dry than on paper, which can cause it to smudge the paper, blur the writing, and even get on your hands, affecting the user experience.

[0003] Chinese patent CN115851148A discloses a high-coverage, quick-drying correction tape based on resin and titanium dioxide, and its preparation method. It mainly reduces the drying time of the masking layer in the oven and increases the production rate of the correction tape by preparing a modified quick-drying alkyd resin, but does not improve the drying time of the ink on the masking layer during use. Patents CN110271331A and CN113088206B both describe the formulation and preparation method of the correction tape's masking layer, but neither mentions a method to improve the long drying time of the ink on the masking layer.

[0004] The present invention aims to solve the above-mentioned problems by providing a correction tape product based on plant-based fillers that can shorten ink drying time and protect the color of paper. Summary of the Invention

[0005] Specifically, in order to achieve the above objectives, the present invention provides a quick-drying core for correction tape, wherein the core coating comprises a base layer, a cover layer and an adhesive layer in sequence, and the raw materials for preparing the cover layer include solvents, pigments, conventional fillers, plant-based fillers, adhesives, additives and other materials.

[0006] The masking layer comprises the following components by weight percentage:

[0007] Solvent 40%-60%,

[0008] Pigment 20%-40%,

[0009] Conventional fillers: 1%-20%,

[0010] Plant-based fillers 1%-40%,

[0011] Adhesive 5%-15%;

[0012] Additives: 0.5%-5%.

[0013] Furthermore, the solvent includes one or more of toluene, xylene, or ethyl acetate, used to dissolve the rubber and mix the raw materials.

[0014] Furthermore, the pigment is titanium dioxide, whose high hiding power and excellent whiteness can effectively cover up typos, while being light-resistant, heat-resistant, alkali-resistant, and dilute acid-resistant, which helps the correction tape maintain stable performance.

[0015] Furthermore, the conventional filler is selected from one or more of calcium carbonate, magnesium carbonate, talc, silica, kaolin, and diatomaceous earth.

[0016] Furthermore, the plant-based filler includes, but is not limited to, cotton fiber (or powder), kapok fiber (or powder), sisal fiber (or powder), flax fiber (or powder), bamboo fiber (or powder), wheat straw fiber (or powder), rice straw fiber (or powder), and wood fiber (or powder).

[0017] Because cellulose molecules contain hydroxyl groups, which are strongly hydrophilic, they form hydrogen bonds—a stronger interaction than ordinary intermolecular forces—when they encounter water, thus firmly holding the water in place. Furthermore, the structure of cellulose is not completely regular; it contains numerous randomly arranged amorphous regions. Water molecules can easily penetrate these regions, widening the gaps between the cellulose molecules and causing the entire fiber to expand in diameter—this is the phenomenon known as "swelling."

[0018] Furthermore, when countless fibers aggregate together, they form a complex three-dimensional network structure filled with numerous micron- or even nano-sized pores. These pores act like countless miniature straws, creating a capillary effect that automatically and rapidly draws in water molecules.

[0019] Based on the above principles, this invention introduces plant fibers into the covering layer, which can quickly absorb ink from the surface, thereby reducing the ink drying time. This invention is not limited to the plant-based fillers listed above, but encompasses all equivalent plant-based materials that can perform "water absorption."

[0020] Furthermore, the rubber adhesive is selected from one or more of styrene-butadiene rubber, ethylene propylene rubber, isoprene rubber, acrylate copolymers, and rosin.

[0021] Furthermore, the additive is selected from one or more of dispersants and wetting agents, which can effectively disperse pigments, conventional fillers and plant-based fillers and prevent agglomeration.

[0022] This invention also proposes a method for preparing a quick-drying tape core for correction tape, the method comprising the following steps:

[0023] Step 1: Dissolve the adhesive in the solvent according to the specified ratio, and add the additives to obtain the first mixture;

[0024] Step 2: Add pigment and conventional filler to the first mixture in sequence, and grind to obtain the second mixture;

[0025] Step 3: Add plant-based filler to the second mixture and grind it to obtain the covering layer slurry;

[0026] Step 4: Apply the masking layer slurry onto the substrate and dry it at 70-130℃ to obtain the masking layer;

[0027] Step 5: Apply pressure-sensitive adhesive evenly to the covering layer and dry it at 80-130℃ to obtain a quick-drying tape core for correction tape.

[0028] The present invention also includes a correction tape made using the quick-drying tape core of the correction tape described above.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. This patent does not change the original formulation system and manufacturing process of the cover layer slurry. It can directly add plant-based filler to the existing solution without the need for new processes or equipment, ensuring the stability of the process and quality, and without increasing labor and energy consumption. Furthermore, this application is the first to propose the use of plant-based filler in the manufacture of correction tape.

[0031] 2. Because this patent introduces plant-based fillers with excellent water absorption, and the plant-based fillers are ground down to the same size as the pigments and fillers, the writing properties and mechanical strength of the covering layer remain unchanged; and the cellulose is broken down during the grinding process, which further improves the water absorption capacity of the plant-based fillers, thereby significantly reducing the drying time of the ink on the correction tape.

[0032] 3. In addition, by selecting suitable plant-based fillers, the color of the covering layer can be adjusted to be closer to the off-white and beige of paper, thus protecting the eyes. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This invention provides a method for preparing a quick-drying tape core for correction tape.

[0035] Figure 2 This presents experimental comparison results of a quick-drying tape core for a correction tape proposed in this invention. Detailed Implementation

[0036] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the invention with unnecessary detail.

[0037] This invention provides a quick-drying core for correction tape. The core coating comprises a base layer, a masking layer, and an adhesive layer in sequence. The raw materials for preparing the masking layer include solvents, pigments, conventional fillers, plant-based fillers, adhesives, additives, and other materials.

[0038] The masking layer comprises the following components by weight percentage:

[0039] Solvent 40%-60%,

[0040] Pigment 20%-40%,

[0041] Conventional fillers: 1%-20%,

[0042] Plant-based fillers 1%-40%,

[0043] Adhesive 5%-15%;

[0044] Additives: 0.5%-5%.

[0045] Furthermore, the solvent includes one or more of toluene, xylene, or ethyl acetate, used to dissolve the rubber and mix the raw materials.

[0046] Furthermore, the pigment is titanium dioxide, whose high hiding power and excellent whiteness can effectively cover up typos, while being light-resistant, heat-resistant, alkali-resistant, and dilute acid-resistant, which helps the correction tape maintain stable performance.

[0047] Furthermore, the conventional filler is selected from one or more of calcium carbonate, magnesium carbonate, talc, silica, kaolin, and diatomaceous earth.

[0048] Furthermore, the plant-based filler includes, but is not limited to, cotton fiber (or powder), kapok fiber (or powder), sisal fiber (or powder), flax fiber (or powder), bamboo fiber (or powder), wheat straw fiber (or powder), rice straw fiber (or powder), and wood fiber (or powder).

[0049] Because cellulose molecules contain hydroxyl groups, which are strongly hydrophilic, they form hydrogen bonds—a stronger interaction than ordinary intermolecular forces—when they encounter water, thus firmly holding the water in place. Furthermore, the structure of cellulose is not completely regular; it contains numerous randomly arranged amorphous regions. Water molecules can easily penetrate these regions, widening the gaps between the cellulose molecules and causing the entire fiber to expand in diameter—this is the phenomenon known as "swelling."

[0050] Furthermore, when countless fibers aggregate together, they form a complex three-dimensional network structure filled with numerous micron- or even nano-sized pores. These pores act like countless miniature straws, creating a capillary effect that automatically and rapidly draws in water molecules.

[0051] Based on the above principles, this invention introduces plant fibers into the covering layer, which can quickly absorb ink from the surface, thereby reducing the ink drying time. This invention is not limited to the plant-based fillers listed above, but encompasses all equivalent plant-based materials that can perform "water absorption."

[0052] Furthermore, the rubber adhesive is selected from one or more of styrene-butadiene rubber, ethylene propylene rubber, isoprene rubber, acrylate copolymers, and rosin.

[0053] Furthermore, the additive is selected from one or more of dispersants and wetting agents, which can effectively disperse pigments, conventional fillers and plant-based fillers and prevent agglomeration.

[0054] like Figure 1 As shown, the present invention also proposes a method for preparing a quick-drying tape core for correction tape, the method comprising the following steps:

[0055] Step 1: Dissolve the adhesive in the solvent according to the specified ratio, and add the additives to obtain the first mixture;

[0056] Step 2: Add pigment and conventional filler to the first mixture in sequence, and grind to obtain the second mixture;

[0057] Step 3: Add plant-based filler to the second mixture and grind it to obtain the covering layer slurry;

[0058] Step 4: Apply the masking layer slurry onto the substrate and dry it at 70-130℃ to obtain the masking layer;

[0059] Step 5: Apply pressure-sensitive adhesive evenly to the covering layer and dry it at 80-130℃ to obtain a quick-drying tape core for correction tape.

[0060] The present invention also includes a correction tape made using the quick-drying tape core of the correction tape described above.

[0061] Example 1

[0062] (1) Dissolve 5 kg of styrene-butadiene rubber in 44.5 kg of toluene and add 0.5 kg of dispersant to obtain a mixture.

[0063] (2) Add 20 kg of titanium dioxide, 5 kg of calcium carbonate and 5 kg of talc to the above mixture in sequence, and grind them to obtain a grinding slurry.

[0064] (3) Add 10 kg of cotton fiber and 10 kg of kapok fiber to the above grinding slurry and grind it to obtain the covering layer slurry.

[0065] (4) The masking layer slurry is applied to the base layer and dried at 70°C to obtain the masking layer.

[0066] (5) Apply pressure-sensitive adhesive evenly to the covering layer and dry it at 120°C to obtain a quick-drying tape core for correction tape.

[0067] Example 2

[0068] (1) Dissolve 3 kg of ethylene propylene rubber and 3 kg of acrylate copolymer in 49 kg of xylene and add 3 kg of wetting agent to obtain a mixture.

[0069] (2) Add 30 kg of titanium dioxide, 1 kg of magnesium carbonate and 1 kg of silicon dioxide to the above mixture in sequence, and grind them to obtain a grinding slurry.

[0070] (3) Add 5 kg of sisal fiber and 5 kg of charred hemp fiber to the above-mentioned grinding slurry and grind it to obtain the covering layer slurry.

[0071] (4) The masking layer slurry is applied to the base layer and dried at 90°C to obtain the masking layer.

[0072] (5) Apply pressure-sensitive adhesive evenly to the covering layer and dry it at 100°C to obtain a quick-drying tape core for correction tape.

[0073] Example 3

[0074] (1) Dissolve 10 kg of isoprene rubber and 5 kg of rosin in 40 kg of ethyl acetate and add 1 kg of dispersant to obtain a mixture.

[0075] (2) Add 39 kg of titanium dioxide, 1 kg of kaolin and 1 kg of diatomaceous earth to the above mixture in sequence, and grind them to obtain a grinding slurry.

[0076] (3) Add 1kg of bamboo fiber, 1kg of wheat straw fiber and 1kg of rice straw fiber to the above-mentioned grinding slurry and grind it to obtain the covering layer slurry.

[0077] (4) The masking layer slurry is applied to the base layer and dried at 110°C to obtain the masking layer.

[0078] (5) Apply pressure-sensitive adhesive evenly to the covering layer and dry it at 110°C to obtain a quick-drying tape core for correction tape.

[0079] Example 4

[0080] (1) Dissolve 5 kg of isoprene rubber and 5 kg of rosin in 53 kg of a mixed solution of toluene and xylene (ratio 1:1), and add 0.5 kg of dispersant and 0.5 kg of wetting agent to obtain a mixture.

[0081] (2) Add 20 kg of titanium dioxide and 15 kg of talc to the above mixture in sequence, and grind them to obtain a grinding slurry.

[0082] (3) Add 1 kg of wood fiber to the above grinding slurry and grind it to obtain the covering layer slurry.

[0083] (4) The masking layer slurry is applied to the base layer and dried at 130°C to obtain the masking layer.

[0084] (5) Apply pressure-sensitive adhesive evenly to the covering layer and dry it at 80°C to obtain a quick-drying tape core for correction tape.

[0085] Example 5

[0086] (1) Dissolve 8 kg of styrene-butadiene rubber in 47 kg of xylene and add 5 kg of wetting agent to obtain a mixture.

[0087] (2) Add 20kg of bamboo fiber and 20kg of wood fiber to the above grinding slurry and grind it to obtain the covering layer slurry.

[0088] (3) The covering layer slurry is applied to the base layer and dried at 110°C to obtain the covering layer.

[0089] (4) Apply pressure-sensitive adhesive evenly to the covering layer and dry it at 90°C to obtain a quick-drying tape core for correction tape.

[0090] Comparative Example 1

[0091] (1) Dissolve 5 kg of isoprene rubber and 5 kg of rosin in 53 kg of a mixed solution of toluene and xylene (ratio 1:1), and add 0.5 kg of dispersant and 0.5 kg of wetting agent to obtain a mixture.

[0092] (2) Add 20 kg of titanium dioxide and 15 kg of talc to the above mixture in sequence, and grind them to obtain the covering layer slurry.

[0093] (3) The masking layer slurry is applied to the base layer and dried at 130°C to obtain the masking layer.

[0094] (4) Apply pressure-sensitive adhesive evenly to the covering layer and dry it at 80°C to obtain a quick-drying tape core for correction tape.

[0095] Comparative Example 2

[0096] (1) Dissolve 3 kg of ethylene propylene rubber and 3 kg of acrylate copolymer in 47 kg of xylene to obtain a mixture.

[0097] (2) Add 30 kg of titanium dioxide, 1 kg of magnesium carbonate and 1 kg of silicon dioxide to the above mixture in sequence, and grind them to obtain a grinding slurry.

[0098] (3) Add 5 kg of sisal fiber and 5 kg of charred hemp fiber to the above-mentioned grinding slurry and grind it to obtain the covering layer slurry.

[0099] (4) The masking layer slurry is applied to the base layer and dried at 90°C to obtain the masking layer.

[0100] (5) Apply pressure-sensitive adhesive evenly to the covering layer and dry it at 100°C to obtain a quick-drying tape core for correction tape.

[0101] The materials obtained from each embodiment and the comparative example were subjected to functional tests. The main testing methods involved are as follows:

[0102] (1) Particle size of the masking layer slurry: The particle size was tested using a Malvern Mastersizer 3000 laser particle size analyzer. Before the test, about 0.5g of the masking layer slurry was added to a 100mL beaker, diluted to an appropriate concentration with xylene as the diluent and dispersion medium, and then ultrasonically dispersed in an ultrasonic cleaner (300W power) for 5 minutes before measurement.

[0103] (2) Drying time of ink on correction tape core: Apply correction tape to A4 paper and write on the masking layer with a ballpoint pen. Place the A4 paper above a balance. After a certain interval, apply a force of 300±50g and rub the ballpoint pen lines from left to right with your index finger. Observe the lines. If the lines do not spread and your index finger is not stained black, then this interval is the drying time of the ink on the correction tape.

[0104] (3) Apply the correction tape onto A4 paper and observe the color of the masking layer.

[0105] Test results are as follows Figure 2 As shown, it can be seen that adding plant-based fillers can effectively reduce the drying time of ink on the correction tape core. Plant-based fillers can also adjust the color of the opacifier layer to be closer to that of the paper, thus protecting the eyes.

[0106] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0107] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A quick-drying tape core for correction tape, characterized in that, The core coating comprises a base layer, a masking layer, and an adhesive layer in sequence. The raw materials for preparing the masking layer include solvents, pigments, conventional fillers, plant-based fillers, adhesives, and additives.

2. The quick-drying tape core for correction tape according to claim 1, wherein the covering layer comprises the following components by weight percentage: Solvent 40%-60%, Pigment 20%-40%, Conventional fillers: 1%-20%, Plant-based fillers 1%-40%, Adhesive 5%-15%, Additives: 0.5%-5%.

3. The quick-drying core for correction tape according to claim 1, wherein the solvent comprises one or more of toluene, xylene or ethyl acetate, used to dissolve the rubber and mix the raw materials.

4. The quick-drying tape core for correction tape according to claim 1, wherein the pigment is titanium dioxide.

5. The quick-drying core for correction tape according to claim 1, wherein the conventional filler is selected from one or more of calcium carbonate, magnesium carbonate, talc, silica, kaolin, and diatomaceous earth.

6. The quick-drying core for correction tape according to claim 1, wherein the plant-based filler includes, but is not limited to, one or more of the following: cotton fiber or cotton fiber powder, kapok fiber or kapok fiber powder, sisal fiber or sisal fiber powder, scorched hemp fiber or powdered scorched hemp fiber, bamboo fiber or bamboo fiber powder, wheat straw fiber or wheat straw fiber powder, rice straw fiber or rice straw fiber powder, and wood fiber or wood fiber powder.

7. A method for preparing a quick-drying tape core for correction tape according to any one of claims 1-6, the method comprising the following steps: Step 1: Dissolve the adhesive in the solvent according to the specified ratio, and add the additives to obtain the first mixture; Step 2: Add pigment and conventional filler to the first mixture in sequence, and grind to obtain the second mixture; Step 3: Add plant-based filler to the second mixture and grind it to obtain the covering layer slurry; Step 4: Apply the masking layer slurry onto the substrate and dry it at 70-130℃ to obtain the masking layer; Step 5: Apply pressure-sensitive adhesive evenly to the covering layer and dry it at 80-130℃ to obtain a quick-drying tape core for correction tape.

8. A correction tape, said correction tape being made using a quick-drying tape core as described in any one of claims 1-6.

9. A correction tape, said correction tape being prepared using the method for preparing a quick-drying tape core for correction tape as described in claim 7.

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