CN115748296A

CN115748296A - High-elongation masking tape base paper, masking tape and preparation method thereof

Info

Publication number: CN115748296A
Application number: CN202211334455.8A
Authority: CN
Inventors: 贾会平; 柳友青
Original assignee: Jiangxi Yongguan Technology Development Co ltd
Current assignee: Jiangxi Yongguan Technology Development Co ltd
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2023-03-07

Abstract

The invention relates to a preparation method of high-elongation masking tape base paper, which comprises the following steps: step (1), raw pulp mixing, namely mixing needle leaf pulp and broad leaf pulp; pulping, namely putting paper pulp and the like into a pulping machine for breaking up and uniformly stirring; grinding the pulp obtained after the crushing and stirring; step (4) forming on a net, removing impurities in the fibers of the ground slurry through screening and sand removing processes, distributing the slurry on the net, and removing moisture in the fibers through the matching of a forming net and a dewatering element to obtain the primary formation of wet paper; step (5), wrinkling for multiple times, wherein water in the wet paper is subjected to suction and squeezing, and wrinkling for more than one time is performed through a wrinkling scraper; (7) drying; and (8) rolling. By adopting the technical scheme, under the condition of ensuring other performance indexes of the adhesive tape, the elongation rate reaches more than 50 percent, which is more than 5 times of that of common textured paper, and the circular sticking is easy to realize.

Description

High-elongation masking tape base paper, masking tape and preparation method thereof

Technical Field

The invention belongs to the field of adhesive tapes, and particularly relates to raw paper of a high-elongation masking tape, an adhesive tape and a preparation method of the adhesive tape.

Background

The masking tape is common and widely used, and has many uses for decoration (spraying) shielding protection; when in construction, the place needing to be shielded is covered by masking with masking tape, and the pasting is basically close to a straight line (straight going), but is difficult to paste a non-straight line; for example, if the figure paper is circular with a certain radian, the elongation of the figure paper is about 10-15%, the turning radius is limited (not too small), when the figure paper is smaller than a certain value, an inner circle is arched, a wrinkle gap is formed (see figure 1), wrinkles are not tightly covered, the construction (painting) is penetrated, and arc lines are not neat, so that the construction quality of a subsequent spraying process is difficult to ensure.

Disclosure of Invention

In conclusion, in order to overcome the defects of the existing products, the invention provides the high-elongation textured paper adhesive tape with the paper elongation rate of more than 50% and the preparation method thereof.

In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of high-elongation masking tape base paper comprises the following steps: the method comprises the following steps of (1) raw pulp batching, namely, mixing softwood pulp and hardwood pulp, and adding a diluted wet strength agent and a fiber reinforcing agent in the pulp mixing process; pulping, namely putting paper pulp and the like into a pulping machine for breaking up and uniformly stirring; grinding the pulp obtained after the crushing and stirring; step (4) forming on a net, namely removing impurities in the fibers of the ground pulp through screening and sand removing processes, controlling the flow rate of pulp fibers through a pulp flowing box, distributing and net-surfing, and removing water in the fibers through the matching of a forming net and a dewatering element to obtain the initial formation of wet paper; step (5), wrinkling for multiple times, wherein water in the wet paper is subjected to pipetting and squeezing, and is subjected to wrinkling for more than one time through a wrinkling scraper; step (6), drying, namely heating the drying cylinder by using steam so as to enable the paper to be attached to the surface of the drying cylinder, and drying the paper by using the surface temperature of the drying cylinder; and (7) winding the dried paper.

By adopting the technical scheme, the key of the high elongation of the masking paper is the process of grain wrinkling; the invention adopts a new wrinkling mode and an innovative secondary wrinkling process (even a tertiary wrinkling process), and the prepared high-elongation masking tape base paper has the elongation of more than 50 percent which is more than 5 times of that of the common masking tape on the premise of ensuring other performance indexes of the tape, and can easily realize circular sticking.

The invention further sets up: in the step 1, the fiber reinforcing agent is added firstly, and then the wet strength agent is added; diluting the fiber reinforcing agent and clear water according to the proportion of 1; diluting the wet strength agent and the clear water according to the proportion of 1; the stirring speed of the stirrer is 650-720 r/min.

By adopting the technical scheme, the pulp and various auxiliary agents are completely mixed and blended into the pulp, so that the combination and dehydration among fibers are facilitated, and various physical indexes of paper can be achieved.

The invention further provides that: in the step 2, CMC is added in the pulping process, clear water is added in the pulping process, the pulping concentration is controlled to be between 4 and 5 percent, a metering pump is used for adding a retention aid and a dispersing agent from an outlet of a pressure screen, and a defoaming agent is added from a pulp washing barrel in the production process; wherein, the retention aid and the clear water are diluted according to the proportion of 1 to 3000, and are stirred for 120 to 180 minutes in the dilution process, and the concentration reaches 0.04 per thousand; stirring the dispersing agent for 10-15 minutes; directly adding CMC and a defoaming agent into the stock solution; the pulper is pulped for 35 to 45 minutes at the rotating speed of 750 to 800 revolutions per minute, and the temperature is controlled to be 38 to 42 ℃; and (3) pulping, pumping into a primary pulp tank for storage, and stirring for 20-30 minutes by a stirrer at 850-900 rpm in the storage process, wherein the temperature is controlled at 38-42 ℃.

By adopting the technical scheme, when the pulp board is crushed, the concentration of crushed pulp is controlled by adding clear water, the concentration of the crushed pulp is controlled to be 4-5%, pulp fibers are completely crushed and do not cake, then the pulp fibers are pumped into the primary pulp tank for storage, a pulp tank stirrer is started to stir for 20-30 minutes at a speed of 880 revolutions per minute in the storage process, and the fibers are uniformly stirred again to obtain sufficient swelling.

The invention further sets up: in the step 3, the grinding speed is 880-920 r/min, the time is 40-50 minutes, and the temperature is 45-52 ℃; in the storage process, the stirrer is used for stirring at the speed of 960-1000 r/min for 20-30 minutes at the temperature of 38-45 ℃; the beating degree of the ground pulp is 42 SR-48 SR, and the wet weight is 16 g-18 g.

By adopting the technical scheme, the pulping process mainly comprises the steps of controlling the fiber length, devillicating and swelling, enabling one strip of fine fiber to be rubbed and kneaded mutually in the disc mill by the pulp inlet pressure of 2.5-3.5KG and the pulp outlet pressure of 3-4KG by using the disc mill, enabling the phenomena of forking, fluffing and the like to be generated on the fiber, meanwhile, cutting off the fiber through a disc mill grinding disc, controlling the fiber length, wholly kneading through the disc mill, enabling the fiber to absorb moisture again, generating swelling change, enabling the fiber to be fully swelled, and keeping the flexibility of the fiber.

The invention further provides that: in the step 5, once wrinkling is carried out, namely, water in the wet paper is subjected to suction and squeezing to enable the wet paper to reach 35-40% dryness, and the wet paper is subjected to first wrinkling through a scraper at a squeezing outlet of the main press roll; and (52) secondary wrinkling, wherein the paper after primary wrinkling is reasonably stretched at the speed of a vat, drawn to the middle of a carrier roller and the vat, extruded by the carrier roller and the vat, subjected to secondary dehydration by utilizing the surface temperature of the vat until the dryness of the paper reaches 50-60%, and subjected to secondary wrinkling by a wrinkling scraper on a wrinkling drying cylinder.

By adopting the technical scheme, the paper after primary wrinkling can not reach the high elongation standard, and needs to be reasonably stretched again through the large-cylinder speed, so that the paper is adhered to the surface of a wrinkling drying cylinder through the matching of extrusion and temperature, the large-cylinder surface temperature is utilized for carrying out secondary dehydration on the paper, and secondary wrinkling is carried out through a wrinkling scraper on the wrinkling drying cylinder.

The invention further provides that: in step 52, the width of the secondary creping cylinder scraper is 120mm, the thickness is 1.25mm, the angle is 90 degrees, and the creping angle formed by the attachment of the scraper and the cylinder surface is 10-26 degrees.

Through adopting above-mentioned technical scheme, wet paper dewaters the back, through the ceramic scraper, lets wet paper produce even fold because the resistance effect of scraper in the twinkling of an eye of paper through the scraper.

The invention further sets up: in the step 52, the wrinkled paper passes through a setting dryer to carry out line setting, the water content of the paper is controlled in the squeezing and wrinkling process, the number of wrinkling lines is 8-10/cm, the depth is 0.12-0.15mm, the formed wet paper is introduced into a squeezing area by utilizing suction and suction to carry out squeezing and dehydration, and the dryness of the paper is 45-55%.

By adopting the technical scheme, the wrinkles generated by the paper are reasonably and effectively distributed at a reasonable speed, so that fine grains are obtained, and the key of high elongation of the beautiful-grain paper is the process of grain wrinkling.

The invention further provides that: in the step 6, the surface temperature of the drying cylinder reaches 80-120 ℃, the environmental temperature of a papermaking machine is controlled to be 50-80 ℃, and the speed of paper passing through the rotation of the drying cylinder and the speed of paper passing through the drying cylinders is 130-180m/min.

By adopting the technical scheme, the drying cylinders are heated by steam, so that the paper is attached to the surfaces of the drying cylinders, and the paper passes through the positions between the rotation of the drying cylinders and is dried by the surface temperature of the drying cylinders.

The invention also provides a preparation method of the high-elongation masking tape, which comprises the following steps: s1: seepage prevention, namely carrying out impregnation treatment on the raw paper of the high-elongation masking tape; s2: coating silicon, namely coating a release agent on the impregnated anti-seepage paper; s3: gluing, namely coating glue on the treated silicon paper to make the silicon paper have viscosity; s4: and (5) cutting, rewinding and cutting the mother roll coated with the glue.

The invention also provides a high-elongation masking tape, which comprises raw paper of the high-elongation masking tape subjected to impregnation treatment, wherein one surface of the impervious paper is coated with a release agent, and the other surface of the impervious paper is coated with glue.

The technical scheme of the invention has the advantages that: the high-elongation masking tape provided by the invention has high elongation and can turn, the turning radius can reach about 90mm when the width of the tape is 2cm, and the turning radius can reach about 35mm when the width of the tape is 1.2cm (see attached figure 2).

The examples describe specific embodiments of the present invention.

Drawings

FIG. 1 is a view showing the effect of bending and adhering a masking tape;

FIG. 2 is a diagram illustrating the effect of bending and adhering the masking tape according to the embodiment of the present invention;

FIG. 3 is a schematic view of a process for preparing a raw paper of masking tape according to an embodiment of the present invention;

FIG. 4 is a raw material proportioning diagram of a masking tape base paper of the embodiment of the invention;

FIG. 5 is a diagram of the additive composition of the masking tape base paper of the masking tape of the embodiment of the present invention;

FIG. 6 is a comparison of the parameters of masking tapes according to embodiments of the present invention;

FIG. 7 is a schematic view of a papermaking machine for preparing raw paper of masking tape according to an embodiment of the present invention;

reference numerals are as follows: 1. the device comprises an upper net forming device, 2 a wrinkling cylinder, 21 a primary wrinkling mechanism, 22 a secondary wrinkling mechanism, 23 a wrinkling roller, 3 a sizing drying cylinder and 4 a winding device.

Detailed Description

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications without inventive contribution to the present embodiment as required after reading the present specification, but all of them are protected by patent law within the scope of the present invention.

Referring to fig. 3, the preparation method of the high-elongation masking tape disclosed in this embodiment includes the following steps:

the method comprises the following steps: and (5) papermaking. The raw pulp paper is crushed, ground into pulp, molded by netting, wrinkled, squeezed, dried and rolled.

Step two: and (5) seepage prevention. The base paper is impregnated to increase the anti-permeability performance of the paper.

Step three: and coating silicon. The impregnated impermeable paper is coated with a release agent, so that the impregnated impermeable paper is convenient to unwind.

Step four: and (6) gluing. And coating glue on the treated silicon paper to make the silicon paper have viscosity.

Step five: and (6) cutting. And rewinding and cutting the mother roll coated with the glue.

1. And (5) preparing base paper.

1.1, raw pulp ingredients.

1.1.1, additive dilution/stirring (see fig. 5):

(1) And (4) diluting the wet strength agent. According to the original solution 1; and (2) diluting the fiber reinforcing agent. According to the stock solution 1; and (3) diluting the retention aid. Stirring for 3 hours in the dilution process according to 1; and (4) stirring the dispersing agent. Stirring for 15 minutes; and (5) directly adding CMC and the defoaming agent into the stock solution.

1.1.2, raw pulp ingredients and additives:

(1) And (4) raw pulp ingredients. Referring to the attached figure 4, the using proportion of needle blade pulp and broad blade pulp is set in the pulp distribution system to be 65%:35 percent; (2) Adding the wet strength agent and the fiber reinforcing agent after dilution in the pulp preparation process, and adding the wet strength agent after adding the fiber reinforcing agent; (3) The CMC is directly added into the pulper in the pulping process according to the dosage on the raw material proportioning table; (4) Adding the retention aid and the dispersing agent from the outlet of the pressure screen by using a metering pump; (5) The defoaming agent is added from the pulp washing barrel in the production process, and the specific usage amount is adjusted according to the actual situation.

1.2, pulping.

The pulping process comprises the steps of dispersing a pack of needle-leaf pulp and broad-leaf pulp into 5-10 pieces according to the proportion in a raw material proportioning table, orderly putting the 5-10 pieces into a pulper, performing pulping for 40 minutes at the rotating speed of 785 revolutions per minute, controlling the pulping concentration by adding clear water when a pulp board is subjected to pulping, controlling the pulping concentration to be 4-5 percent, completely performing pulping and non-caking on pulp fibers, pumping the pulp fibers into a primary pulp pool for storage, starting a pulp pool stirrer to perform stirring for 20-30 minutes at the rotating speed of 880 revolutions per minute in the storage process, and uniformly stirring the fibers again to obtain sufficient swelling.

1.3, grinding the pulp.

The pulping process mainly comprises the steps of controlling the fiber length, devillicating and swelling, utilizing a disc mill to rub and knead fibers in the disc mill with pulp inlet pressure of 2.5-3.5KG and pulp outlet pressure of 3-4KG, enabling the fibers to generate phenomena of hair, fuzzing and the like on the fibers, cutting the fibers through a disc mill grinding sheet, controlling the fiber length, integrally kneading through the disc mill, enabling the fibers to absorb moisture again, enabling the fibers to fully swell, and keeping the flexibility of the fibers.

And (6) testing. 100 g of wet pulp is taken for testing, the refining beating degree is 48-42SR, and the wet weight is 16-18 g.

1.4, forming on a net, squeezing and wrinkling, drying and rolling (see attached figure 7).

(1) And (5) molding the net on the net.

The ground pulp is screened and sand-removed to remove impurities in the fiber, the flow velocity of the pulp fiber is controlled by a pulp flowing box to be distributed on the net, the pulp fiber on the net is impacted by the pulp speed, driven by the net speed (180 m/min) and shaken (300-500 times/min) to be distributed on the net in a more effective combined and arranged mode, the moisture in the fiber is removed by the matching of a forming net and a dewatering element to obtain the primary formation of wet paper, the specific net-surfing flow is automatically adjusted according to the ration of the paper, the net-surfing concentration of the pulp in the net-surfing formation is controlled to be about 2.8%, and the opening degree of a lip of the pulp flowing box is controlled to be about 18-20 to carry out net-surfing papermaking.

(2) Once wrinkling.

Squeezing and wrinkling are mainly performed on the wet paper by sucking, absorbing and squeezing the water in the wet paper to enable the wet paper to reach a certain dryness (35-40%), and the wet paper is wrinkled for the first time through a scraper at a squeezing outlet of a main pressing roller.

And (5) wrinkling the lines. After the wet paper is dewatered, the wet paper is subjected to uniform wrinkles through the ceramic scraper due to the resistance action of the scraper in the moment that the paper passes through the scraper, and the wrinkles generated by the paper are subjected to reasonable and effective distribution at a reasonable speed, so that fine and dense grains are obtained, and the key of high elongation of the beautiful grain paper is the wrinkling process.

(3) And (5) secondary wrinkling.

The paper after the first wrinkling can not reach the high elongation standard, the paper needs to be drawn to the middle of a carrier roller and a large cylinder through reasonable stretching of the large cylinder at the speed of the large cylinder again, the carrier roller and the large cylinder are extruded, the paper is adhered to the surface of a wrinkling drying cylinder through the matching of extrusion and temperature, the paper is dehydrated again by utilizing the surface temperature of the large cylinder, the dryness of the paper reaches 50-60 percent, and the paper is wrinkled for the second time through a wrinkling scraper on the wrinkling drying cylinder; the width of the secondary wrinkling dryer scraper is 120mm, the thickness is 1.25mm, the angle is 90 degrees, and the wrinkling angle formed by the scraper and the cylinder surface is 10-26 degrees. And (4) the wrinkled paper is subjected to line setting through a setting dryer. In the process of pressing and wrinkling, the water content of paper, the number of wrinkling lines (8-10 strips/cm) and the depth (0.12-0.15 mm) are controlled, the formed wet paper is introduced into a pressing area by suction to be pressed and dehydrated, and the dryness of the paper is controlled to be about 45-55%.

(4) And (5) drying.

The drying cylinders are heated by steam, the surface temperature of the drying cylinders reaches 80-120 ℃, the environmental temperature (50-80 ℃) of a papermaking machine table is controlled, so that paper is attached to the surfaces of the drying cylinders, the paper is connected with the drying cylinders at a speed (130-180 m/min) through the rotation of the drying cylinders, and the paper is dried by the surface temperature of the drying cylinders.

(5) And (7) rolling.

And (4) winding the dried paper according to the speed of a drying cylinder (130-180 m/min), controlling the number of meters of the paper roll according to requirements, and testing indexes such as tensile strength, thickness, elongation, moisture, water absorption and the like during unwinding.

2. And (5) seepage prevention.

The base paper is subjected to impregnation treatment, so that the anti-permeability performance or dyeing effect of the paper is improved.

3. And coating silicon.

Coating release agent on the anti-seepage masking paper for convenient uncoiling, and standing for 4-5 days after coating the release agent to solidify the silicon paper.

4. And (6) gluing.

And coating glue on the treated impermeable silicon paper to make the impermeable silicon paper have viscosity.

5. And (6) cutting.

And rewinding and slitting the mother roll coated with the glue to obtain a finished adhesive tape.

While the foregoing is directed to the preferred embodiment and embodiments of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention.

Claims

1. A preparation method of raw paper of high-elongation masking tape is characterized by comprising the following steps: step (1), raw pulp mixing, namely mixing needle leaf pulp and broad leaf pulp; pulping, namely putting paper pulp and the like into a pulping machine for breaking up and uniformly stirring; grinding the pulp obtained after the crushing and stirring; step (4) forming on a net, removing impurities in the fibers of the ground slurry through screening and sand removing processes, distributing the slurry on the net, and removing moisture in the fibers through the matching of a forming net and a dewatering element to obtain the primary formation of wet paper; step (5), wrinkling for multiple times, wherein water in the wet paper is subjected to suction and squeezing, and wrinkling for more than one time is performed through a wrinkling scraper; step (6), drying, namely heating the drying cylinder by using steam so as to enable the paper to be attached to the surface of the drying cylinder, and drying the paper by using the surface temperature of the drying cylinder; and (7) winding the dried paper.

2. The method for preparing the raw paper of the high-elongation masking tape as claimed in claim 1, wherein the method comprises the following steps: in the step 1, the fiber reinforcing agent is added firstly, and then the wet strength agent is added; diluting the fiber reinforcing agent and clear water according to the proportion of 1; diluting the wet strength agent and the clear water according to the proportion of 1; the stirring speed of the stirrer is 650-720 r/min.

3. The method for preparing the raw paper of the high-elongation masking tape as claimed in claim 1, wherein the method comprises the following steps: in the step 2, CMC is added in the pulping process, clear water is added in the pulping process, the pulping concentration is controlled to be between 4 and 5 percent, a metering pump is used for adding a retention aid and a dispersing agent from an outlet of a pressure screen, and a defoaming agent is added from a pulp washing barrel in the production process; wherein, the retention aid and the clear water are diluted according to the proportion of 1 to 3000, and are stirred for 120 to 180 minutes in the dilution process, and the concentration reaches 0.04 per thousand; stirring the dispersing agent for 10-15 minutes; directly adding CMC and a defoaming agent into the stock solution; the pulper is pulped for 35 to 45 minutes at the rotating speed of 750 to 800 revolutions per minute, and the temperature is controlled to be 38 to 42 ℃; and (3) crushing the pulp, pumping the crushed pulp into a primary pulp pool for storage, and stirring the pulp for 20 to 30 minutes by a stirrer at the speed of 850 to 900 revolutions per minute in the storage process, wherein the temperature is controlled to be 38 to 42 ℃.

4. The method for preparing the raw paper of the high-elongation masking tape as claimed in claim 1, wherein the method comprises the following steps: in the step 3, the grinding speed is 880-920 r/min, the time is 40-50 minutes, and the temperature is 45-52 ℃; in the storage process, the stirrer is stirred for 20-30 minutes at 960-1000 rpm, and the temperature is 38-45 ℃; the beating degree of the ground pulp is 42 SR-48 SR, and the wet weight is 16 g-18 g.

5. The method for preparing the raw paper of the high-elongation masking tape as claimed in claim 1, wherein the method comprises the following steps: in the step 5, primary wrinkling is carried out, wherein water in the wet paper is subjected to suction and squeezing to enable the wet paper to reach 35-40% dryness, and the wet paper is subjected to primary wrinkling through a scraper at a squeezing outlet of the main press roll; and (52) secondary wrinkling, wherein the paper after primary wrinkling is reasonably stretched at the speed of a vat, is drawn to the middle of a carrier roller and the vat, the carrier roller and the vat are extruded, the surface temperature of the vat is utilized to dehydrate the paper again, the dryness of the paper reaches 50-60%, and the paper is subjected to secondary wrinkling by a wrinkling scraper on a wrinkling drying cylinder.

6. The method for preparing the raw paper of the high-elongation masking tape as claimed in claim 5, wherein the method comprises the following steps: in step 52, the width of the secondary creping cylinder scraper is 120mm, the thickness is 1.25mm, the angle is 90 degrees, and the creping angle formed by the attachment of the scraper and the cylinder surface is 10-26 degrees.

7. The method for preparing the raw paper of the high-elongation masking tape as claimed in claim 5, wherein the method comprises the following steps: in the step 52, the wrinkled paper passes through a setting dryer to be subjected to line setting; the number of wrinkling lines is 8-10 strips/cm, the depth is 0.12-0.15mm, the formed wet paper is introduced into a pressing area by using suction to be pressed and dehydrated, and the dryness of the paper is 45-55%.

8. The method for preparing the raw paper of the high-elongation masking tape as claimed in claim 1, wherein the method comprises the following steps: in the step 6, the surface temperature of the drying cylinder reaches 80-120 ℃, the environmental temperature of a papermaking machine is controlled to be 50-80 ℃, and the speed of paper passing through the rotation of the drying cylinder and the speed of paper passing through the drying cylinders is 130-180m/min.

9. A preparation method of a high-elongation masking tape is characterized by comprising the following steps: s1: a step of preventing seepage, which is to perform impregnation treatment on the base paper of the high-elongation masking tape of any one of claims 1 to 8; s2: coating silicon, namely coating a release agent on the impregnated barrier paper; s3: gluing, namely coating glue on the treated silicon paper to make the silicon paper have viscosity; s4: and cutting, namely rewinding and cutting the mother roll coated with the glue.

10. A high-elongation masking tape, which is characterized in that: the method comprises the steps of adopting impregnated paper adhesive tape base paper with high-elongation beautiful lines as described in any one of claims 1-8, coating release agent on one side of the barrier paper, and coating glue on the other side of the barrier paper.