Manufacturing method of propylene pen drawing paper

Abstract

The invention relates to the technical field of drawing art paper, in particular to a manufacturing method of paper for drawing by a propylene pen, which is characterized by comprising the following steps of: (1) pulping and preparing pulp; (2) sizing in the pulp, and feeding on a net in a flowing manner; (3) dehydrating and forming; (4) sizing the surface of the paper; (5) drying; (6) pressing by a flat pressing machine, and the special paper suitable for propylene pen painting and suitable for propylene pen painting is obtained through the treatment and has the advantages that the manufacturing method is simple, the surface of the paper is free of scratching and fuzzing phenomena, the painting color is bright, and the color expressive force is high.

Description

Technical Field

[0001] The invention relates to the technical field of art paper for painting, in particular to a method for making acrylic pen painting paper. Background Art

[0002] As we all know, painting as an art form has a history of thousands of years. Its diversity has also provided human society with rich and colorful paintings, many of which are of great collection value and have been passed down to later generations. In terms of painting forms, there are ink painting (landscape painting), watercolor painting, oil painting, sketching, printmaking and other forms of expression. Different painting forms use different paper materials. For example, ink landscape painting uses a brush on rice paper, watercolor painting uses watercolor paper, and sketching uses sketch paper. At the end of the last century, marker pen painting and acrylic pen painting were introduced into my country, and soon became popular in the fields of architectural design, garden design, fashion design, animation design, etc. The paper material used for marker pen painting is marker pen drawing paper, and the pigment used by acrylic pen is acrylic pigment. Acrylic pigment is not Soluble in water, so acrylic pens are made of mixed solvents and acrylic paint. The tip of the acrylic pen is made of nylon, which is harder and more wear-resistant. Acrylic pen paintings have strong covering power and bright colors. The colors are not easy to smudge after drying, and the colors are more stable. Therefore, acrylic pens are irreplaceable for markers in many painting occasions. Acrylic pens contain solvents in the ink, which penetrate quickly into the paper surface. Ordinary paper quickly penetrates into the back of the paper. Because the tip of the acrylic pen is made of hard and wear-resistant nylon material, the surface of the paper is easily rubbed by the hard pen tip and becomes fluffy during painting, and the pigment adhesion effect becomes poor, which seriously affects the painting quality. Summary of the invention

[0003] The purpose of the present invention is to solve the above-mentioned shortcomings of the prior art and provide a method for producing acrylic pen painting paper which has a simple production method, does not produce scratches or fuzzing on the paper surface, has bright painting colors and strong color expression.

[0004] The technical solution adopted by the present invention to solve its technical problem is: A method for making acrylic pen drawing paper, characterized in that the steps of the making method are as follows: (1) Pulping: 30-80% coniferous pulp, 70-20% hardwood pulp. The coniferous pulp and hardwood pulp are crushed by a hydraulic pulper, mixed evenly, and then pulped by a double-disc pulper with a beating degree of 32-40 OSR. (2) Pulping: Mix the beaten softwood pulp and hardwood pulp in a mixing tank, and then add 1.0-1.8% of cationic starch dry strength agent; after the cationic starch dry strength agent is evenly mixed with the pulp, add 2.0-2.8% of PAE wet strength agent; (3) Internal sizing and dehydration: The prepared slurry is conveyed to the screen through the slurry flow system. The neutral sizing agent AKD is continuously added online in the slurry flow system to perform internal sizing on the paper. The amount of AKD neutral sizing agent is 1.0-2.0%, and 100-180ppm of cationic polyacrylamide retention aid is added. After the slurry is on the screen, it is dehydrated and formed through the screen to form a wet paper sheet. (4) Paper surface sizing: After the wet paper leaves are squeezed and dehydrated in the press section of the paper machine, they enter the drying cylinder for drying before surface sizing. The dried paper leaves enter the surface sizing machine for surface sizing treatment; (5) Drying: After the surface is sizing, the paper is dried by hot air at a temperature of 140 degrees and a hot air drying channel length of 4 meters, and then dried by a drying cylinder to form acrylic paper base paper; (6) Pressing with a flat press: The base paper is pressed with a flat press at a pressure of 120-200 MPa. After the above treatment, acrylic pen painting paper suitable for acrylic pen painting is obtained.

[0005] The softwood pulp in step (1) of the present invention is preferably 40%, the hardwood pulp is preferably 60%, and the beating degree is preferably 36. O SR.

[0006] The cationic starch gelatinization concentration in step (2) of the present invention is 10.0%, the use concentration is 5.0%, the amount of cationic starch dry strength agent is preferably 1.6%, and the amount of PAE wet strength agent is preferably 2.4%.

[0007] The amount of the AKD neutral sizing agent in step (3) of the present invention is preferably 1.6%, and the amount of the cationic polyacrylamide retention aid added is preferably 140 ppm.

[0008] The paper sheet dried before surface sizing in step (4) of the present invention has a dryness of 90-95%.

[0009] The formula and proportion of the surface sizing solution in the surface sizing treatment in step (4) of the present invention are: oxidized starch: 100 parts, aqueous wax emulsion: 10-18 parts, AKD: 5-10 parts, nanocellulose: 1-2 parts.

[0010] In the step (4) of the present invention, the surface sizing solution concentration is 7.0-9.0%, and the surface glue coating amount is 1.0-3.0 g / m 2 , and double-sided glue.

[0011] In step (6) of the present invention, the flat press uses two flat presses to compact the propylene paper base paper. The flat press flat calendering roller is a chrome-plated roller with a surface roughness of 0.01um, and the bottom roller is a resin roller with a hardness of 100 Shore degrees.

[0012] In step (6) of the present invention, the arrangement of the calender rollers and the resin rollers of the two-pass calendering machine is as follows: the calender roller of the first pass is on the top and the resin roller is on the bottom; the resin roller of the second pass is on the top and the calender roller is on the bottom. After calendering, the paper density reaches 0.90-0.94 g / cm 3 The air permeability of the paper is 22-34ml / min, and the smoothness reaches 80-90s.

[0013] The invention has the advantages of simple manufacturing method, no scratching and fuzzing on the paper surface, bright painting colors, strong color expression, etc. due to the adoption of the method. DETAILED DESCRIPTION

[0014] The present invention is further described below: A method for making acrylic pen drawing paper, characterized in that the steps of the making method are as follows: (1) Pulping: 30-80% coniferous pulp, 70-20% hardwood pulp. The coniferous pulp and hardwood pulp are crushed by a hydraulic pulper, mixed evenly, and then pulped by a double-disc pulper. The beating degree is 32-40 O SR; (2) Pulping: Mix the beaten softwood pulp and hardwood pulp in a mixing tank, and then add 1.0-1.8% of cationic starch dry strength agent; after the cationic starch dry strength agent is evenly mixed with the pulp, add 2.0-2.8% of PAE wet strength agent; (3) Internal sizing and dehydration: The prepared slurry is conveyed to the screen through the slurry flow system. The neutral sizing agent AKD is continuously added online in the slurry flow system to perform internal sizing on the paper. The amount of AKD neutral sizing agent is 1.0-2.0%, and 100-180ppm of cationic polyacrylamide retention aid is added. After the slurry is on the screen, it is dehydrated and formed through the screen to form a wet paper sheet. (4) Paper surface sizing: After the wet paper leaves are squeezed and dehydrated in the press section of the paper machine, they enter the drying cylinder for drying before surface sizing. The dried paper leaves enter the surface sizing machine for surface sizing treatment; (5) Drying: After the surface is sizing, the paper is dried by hot air at a temperature of 140 degrees and a hot air drying channel length of 4 meters, and then dried by a drying cylinder to form acrylic paper base paper; (6) Pressing with a flat press: The base paper is pressed with a flat press at a pressure of 120-200 MPa. After the above treatment, acrylic pen painting paper suitable for acrylic pen painting is obtained.

[0015] Furthermore, the softwood pulp in step (1) is preferably 40%, the hardwood pulp is preferably 60%, and the beating degree is preferably 36. O SR.

[0016] Furthermore, the cationic starch gelatinization concentration in step (2) is 10.0%, the use concentration is 5.0%, the amount of cationic starch dry strength agent is preferably 1.6%, and the amount of PAE wet strength agent is preferably 2.4%.

[0017] Furthermore, the amount of the AKD neutral sizing agent in step (3) is preferably 1.6%, and the amount of the cationic polyacrylamide retention aid added is preferably 140 ppm.

[0018] Furthermore, the paper sheet dried before surface sizing in step (4) has a dryness of 90-95%.

[0019] Furthermore, the formula and proportion of the surface sizing solution in the surface sizing treatment in step (4) are as follows: oxidized starch: 100 parts, aqueous wax emulsion 10-18 parts, AKD: 5-10 parts, nanocellulose 1-2 parts, the surface sizing solution adopts modified starch and aqueous wax emulsion to improve the smoothness of the paper surface, and neutral sizing agent AKD is added to strengthen the surface of the pulp sizing to improve the water resistance of the paper surface, and the cobb value of the paper surface is 12-16g / m 2 , adding nanocellulose to improve the surface strength of paper, and the surface strength of paper is controlled above 18 (pulling rod method).

[0020] Furthermore, in the step (4), the surface sizing solution concentration is 7.0-9.0%, and the surface glue coating amount is 1.0-3.0 g / m 2 , which is double-sided adhesive.

[0021] Furthermore, in the step (6), the flat press uses two flat presses to compact the acrylic paper base paper, the flat press calendering roller is a chrome-plated roller with a surface roughness of 0.01 um, and the bottom roller is a resin roller with a hardness of 100 Shore degrees.

[0022] Furthermore, in the step (6), the distribution of the calender rollers and the resin rollers of the two calendering machines is as follows: the calender roller of the first calendering machine is on the top and the resin roller is on the bottom; the resin roller of the second calendering machine is on the top and the calender roller is on the bottom. After calendering, the paper density reaches 0.90-0.94 g / cm 3 The paper structure is denser, the paper permeability is 22-34ml / min, the paper surface is smoother, and the smoothness reaches 80-90s.

[0023] The base paper of acrylic paper has low density and large porosity. When painting, the acrylic pen ink can easily penetrate and diffuse into the paper page. A two-pass flat press is used to compact the base paper of acrylic paper.

[0024] The acrylic pen drawing paper of the above scheme is produced by a fourdrinier paper machine, and is made by selecting original coniferous wood pulp and hardwood pulp in a certain proportion. The coniferous wood pulp and hardwood pulp are refined by a double-disc mill to improve the hydrogen bonding between pulp fibers. Cationic starch dry strength agent and PAE wet strength agent are added to the pulp, and AKD neutral sizing agent is used for internal sizing to make the fibers have a certain internal sizing effect. The well-proportioned pulp is flowed to a headbox through a pulp flow system, sprayed onto the net through the headbox, and formed into base paper through net dehydration, pressing dehydration, drying cylinder drying before surface sizing, surface sizing, and drying after surface sizing. The surface sizing is formed by modified starch, aqueous wax emulsion, neutral sizing agent AKD, and nanocellulose. The surface sizing agent forms a protective layer for paper fibers on the surface of the paper. The surface sizing uses an aqueous wax emulsion to improve the smoothness and water resistance of the paper surface. The neutral sizing agent AKD is used. The AKD sizing in the pulp is used to improve the sizing performance of the paper, reduce the cobb value of the paper surface, and use the nanocellulose in the surface glue to enhance the bridging of the modified starch and improve the surface strength of the paper. After the surface sizing, the paper is dried to form an acrylic pen painting paper base with a protective layer of high smoothness, high water resistance and high surface strength. The acrylic pen painting paper base is then subjected to two flat pressing and calendering treatments on the flat press to improve the smoothness of the paper surface and the density of the paper structure, so as to meet the effect of solvent-based acrylic pen painting on the paper surface without linting and penetration.

[0025] The fiber raw materials for producing acrylic pen painting paper base paper are optimized and selected, softwood pulp with a large fiber aspect ratio is selected, and the fiber raw materials are appropriately refined. During papermaking, cationic starch dry strength agent, PAE wet strength agent and neutral sizing agent AKD are added to the pulp, and neutral sizing agent AKD is added to the surface sizing liquid to reinforce the sizing, thereby improving the wet strength and surface sizing performance of the paper, reducing the surface absorption performance of the paper, and preventing the penetration of acrylic pen ink. Aqueous wax emulsion is added to improve the smoothness of the paper surface, and nanocellulose for surface glue is added to improve the surface strength of the paper to prevent the paper surface from being scratched and rubbed by the pen head, and a high-concentration surface sizing liquid is used. The amount of glue on the paper surface is increased, and the surface performance of the paper is improved. The produced base paper is further processed by flat pressing and calendering to further improve the compactness of the paper structure. The high surface water resistance, surface strength and surface smoothness give the paper the ability to resist scratching by acrylic pen tips. The high wet strength and structural density of the paper prevent acrylic ink from penetrating into the paper, thereby well meeting the requirements of acrylic pen painting on the paper surface. When painting, the paper surface does not produce scratching and fuzzing phenomena, and the painting is bright in color and has strong color expression. Due to the use of the above method, the present invention has the advantages of simple production method, no scratching and fuzzing phenomenon on the paper surface, bright in color and strong color expression, etc.

[0026] Production Example 1: 150g / m2 Production of acrylic painting paper: 30% coniferous wood pulp, 70% hardwood pulp. The coniferous wood pulp and hardwood wood pulp boards are crushed in a hydraulic pulper respectively, mixed evenly, and the concentration is adjusted to 5.0%. The mixed pulp of coniferous wood pulp and hardwood wood pulp is mixed and beaten with a beating degree of 40. O SR, add 1.8% cationic starch dry strength agent and 2.8% PAE wet strength agent to the pulp after beating in the batching tank, mix well and send to the net through the pulp flow system. In the process, use a metering pump to continuously add 2.0% (absolute dry amount of pulp sent by the system) of neutral sizing agent AKD, and continuously add 180ppm of cationic polyacrylamide retention agent to the pipeline within 1 meter before the pulp is sent to the net. After the pulp is sent to the net, it is dehydrated and formed by the wire section to form a wet paper sheet. After the wet paper sheet is pressed and dehydrated in the paper machine pressing section, it enters the drying cylinder before surface sizing. At this time, the paper sheet dryness is 95%, and it enters the surface sizing machine for surface sizing treatment. Surface sizing oxidized starch: 100 parts, water-based wax emulsion 10 parts, AKD 10 parts, nanocellulose 1 part, surface sizing liquid concentration 7.0%, surface glue amount (double-sided) 1.0g / m 2 After the surface is sizing, the paper is dried by hot air at a temperature of 140 degrees and a length of 4 meters. Then it enters the drying cylinder after the surface sizing and is rolled up. The base paper is flat-pressed by a flat press at a pressure of 120 MPa. After the flat-pressing, it is cut and sorted to form the finished acrylic pen painting paper.

[0027] 150g / m 2 The technical performance indicators of acrylic pen painting paper are as follows Table 1: 150g / m2 of the above performance indicators 2 Acrylic painting paper has been used in painting experiments with acrylic pens. The surface is smooth, the colors are bright, the paper surface does not lint, and the ink does not spread.

[0028] Production Example 2: 200g / m 2 Production of acrylic painting paper: 40% coniferous wood pulp, 60% hardwood pulp. The coniferous wood pulp and hardwood wood pulp boards are crushed in a hydraulic pulper respectively, mixed evenly, and the concentration is adjusted to 5.0%. The mixed pulp of coniferous wood pulp and hardwood wood pulp is mixed and beaten with a beating degree of 38. OSR, 1.6% of cationic starch dry strength agent and 2.6% of PAE wet strength agent are added to the pulping tank after beating, and then mixed evenly and sent to the screen through the pulp flow system. In the process, a metering pump is used to continuously add 1.8% (absolute dry amount of pulp sent by the system) of neutral sizing agent AKD, and a cationic polyacrylamide retention agent of 160ppm of the absolute dry amount of pulp sent by the system is continuously added to the pipeline within 1 meter before the pulp is sent to the screen. After the pulp is sent to the screen, it is dehydrated and formed by the wire section to form a wet paper sheet. After the wet paper sheet is pressed and dehydrated in the paper machine pressing section, it enters the surface sizing pre-drying cylinder drying. At this time, the paper sheet dryness is 94%, and it enters the surface sizing machine for surface sizing treatment. Surface sizing oxidized starch: 100 parts, water-based wax emulsion 12 parts, AKD8 parts, nanocellulose 1.2 parts, surface sizing liquid concentration 7.5%, surface glue coating amount (double-sided) 1.5g / m 2 After the surface is sizing, the paper is dried by hot air at a temperature of 140 degrees and a length of 4 meters. Then it enters the drying cylinder after the surface sizing and is rolled up. The base paper is flat-pressed by a flat press at a pressure of 140 MPa. After the flat-pressing, it is cut and sorted to form the finished acrylic pen painting paper.

[0029] 200g / m 2 The technical performance indicators of acrylic pen painting paper are as follows in Table 2: 200g / m2 of the above performance indicators 2 Acrylic painting paper has been used in painting experiments with acrylic pens. The surface is smooth, the colors are bright, the paper surface does not lint, and the ink does not spread.

[0030] Production Example 3: 250g / m 2 Production of acrylic painting paper: 55% coniferous wood pulp, 45% hardwood pulp. The coniferous wood pulp and hardwood wood pulp boards are crushed in a hydraulic pulper respectively, mixed evenly, and the concentration is adjusted to 5.0%. The mixed pulp of coniferous wood pulp and hardwood wood pulp is mixed and beaten with a beating degree of 36. OSR, 1.4% of cationic starch dry strength agent and 2.4% of PAE wet strength agent are added to the pulping tank after beating, and then mixed evenly and sent to the screen through the pulp flow system. In the process, a metering pump is used to continuously add 1.6% (absolute dry amount of the pulp sent by the system) of neutral sizing agent AKD, and a cationic polyacrylamide retention agent of 140ppm of the absolute dry amount of the pulp sent by the system is continuously added to the pipeline within 1 meter before the pulp is sent to the screen. After the pulp is sent to the screen, it is dehydrated and formed by the wire section to form a wet paper sheet. After the wet paper sheet is pressed and dehydrated in the paper machine pressing section, it enters the drying cylinder before surface sizing. At this time, the paper sheet dryness is 93%, and it enters the surface sizing machine for surface sizing treatment. Surface sizing oxidized starch: 100 parts, water-based wax emulsion 14 parts, AKD7 parts, nanocellulose 1.4 parts, surface sizing liquid concentration 8.0%, surface glue coating amount (double-sided) 2.0g / m 2 After the surface is sizing, the paper is dried by hot air at a temperature of 140 degrees and a length of 4 meters. Then it enters the drying cylinder after the surface sizing and is rolled up. The base paper is flat-pressed by a flat press at a pressure of 160 MPa. After the flat-pressing, it is cut and sorted to form the finished acrylic pen painting paper.

[0031] 250g / m 2 The technical performance indicators of acrylic pen painting paper are as follows in Table 3: 250g / m2 of the above performance indicators 2 Acrylic painting paper has been used in painting experiments with acrylic pens. The surface is smooth, the colors are bright, the paper surface does not lint, and the ink does not spread.

[0032] Production Example 4: 280g / m 2 Production of acrylic painting paper: 70% coniferous wood pulp, 30% hardwood pulp. The coniferous wood pulp and hardwood wood pulp boards are crushed in a hydraulic pulper respectively, mixed evenly, and the concentration is adjusted to 5.0%. The mixed pulp of coniferous wood pulp and hardwood wood pulp is mixed and beaten with a beating degree of 34 OSR, add 1.2% cationic starch dry strength agent and 2.2% PAE wet strength agent to the pulping tank after beating, mix well and send it to the screen through the pulp flow system. In the process, a metering pump is used to continuously add 1.4% (absolute dry amount of pulp sent by the system) of neutral sizing agent AKD, and a cationic polyacrylamide retention agent of 120ppm of the absolute dry amount of pulp sent by the system is continuously added to the pipeline within 1 meter before the pulp is sent to the screen. After the pulp is sent to the screen, it is dehydrated and formed by the wire part to form a wet paper sheet. After the wet paper sheet is pressed and dehydrated in the paper machine pressing part, it enters the drying cylinder before surface sizing. At this time, the paper sheet dryness is 92%, and it enters the surface sizing machine for surface sizing treatment. Surface sizing oxidized starch: 100 parts, water-based wax emulsion 16 parts, AKD6 parts, nanocellulose 1.6 parts, surface sizing liquid concentration 8.5%, surface glue coating amount (double-sided) 2.5g / m 2 After the surface is sizing, the paper is dried by hot air at a temperature of 140 degrees and a length of 4 meters. Then it enters the drying cylinder after the surface sizing and is rolled up. The base paper is flat-pressed by a flat press at a pressure of 180 MPa. After the flat-pressing, it is cut and sorted to form the finished acrylic pen painting paper.

[0033] 280g / m 2 The technical performance indicators of acrylic pen painting paper are as follows in Table 4: 280g / m 2 Acrylic painting paper has been used in painting experiments with acrylic pens. The surface is smooth, the colors are bright, the paper surface does not lint, and the ink does not spread.

[0034] Production Example 5: 300g / m 2 Production of acrylic painting paper: 80% coniferous wood pulp, 20% hardwood pulp. The coniferous wood pulp and hardwood wood pulp boards are crushed in a hydraulic pulper respectively, mixed evenly, and the concentration is adjusted to 5.0%. The mixed pulp of coniferous wood pulp and hardwood wood pulp is mixed and beaten with a beating degree of 32 OSR, add 1.0% cationic starch dry strength agent and 2.0% PAE wet strength agent to the pulping tank after beating, mix well and then send it to the net through the pulp flow system. In the process, a metering pump is used to continuously add 1.2% (absolute dry amount of pulp sent by the system) of neutral sizing agent AKD, and a cationic polyacrylamide retention agent of 100ppm of the absolute dry amount of pulp sent by the system is continuously added to the pipeline within 1 meter before the pulp is sent to the net. After the pulp is sent to the net, it is dehydrated and formed by the wire section to form a wet paper sheet. After the wet paper sheet is pressed and dehydrated in the paper machine pressing section, it enters the drying cylinder before surface sizing. At this time, the paper sheet dryness is 90%, and it enters the surface sizing machine for surface sizing treatment. Surface sizing oxidized starch: 100 parts, water-based wax emulsion 18 parts, AKD5 parts, nanocellulose 1.8 parts, surface sizing liquid concentration 9.0%, surface glue coating amount (double-sided) 3.0g / m 2 After the surface is sizing, the paper is dried by hot air at a temperature of 140 degrees and a length of 4 meters. Then it enters the drying cylinder after the surface sizing and is rolled up. The base paper is flat-pressed by a flat press at a pressure of 200 MPa. After the flat-pressing, it is cut and sorted to form the finished acrylic pen painting paper.

[0035] 300g / m 2 The technical performance indicators of acrylic pen painting paper are as follows in Table 5: The above performance indicators of 300g / m 2 Acrylic painting paper has been used in painting experiments with acrylic pens. The surface is smooth, the colors are bright, the paper surface does not lint, and the ink does not spread.

[0036] The cationic starch gelatinization concentration of the cationic starch dry strength agent used above is 10.0%, and the usage concentration is 5.0%.

[0037] Comparative Example 1: Taking production example 2 as an example, no neutral sizing agent AKD is added in the surface sizing, that is, oxidized starch: 100 parts, aqueous wax emulsion 12 parts, nanocellulose 1.2 parts, surface sizing liquid concentration 7.5%, cationic starch, wet strength agent PAE, neutral sizing agent AKD and polyacrylamide retention agent added to the pulp are unchanged, and the surface absorption weight of the produced paper after two flat rollers is detected to be 22g / m 2 The gluing degree of the paper has obviously deteriorated. When using acrylic pen for painting test, the result shows that the acrylic pen ink has obvious diffusion phenomenon.

[0038] Comparative Example 2: Taking production example 2 as an example, no aqueous wax emulsion is used in surface sizing, namely, 100 parts of oxidized starch, 8 parts of AKD, 1.2 parts of nanocellulose, and the concentration of surface sizing solution is 7.5%. The amounts of cationic starch, wet strength agent PAE, neutral sizing agent AKD and polyacrylamide retention aid added to the slurry remain unchanged. The smoothness of the produced paper is tested after being pressed by two flat rollers. The smoothness of the front side is 62s and that of the back side is 58s. The smoothness of the paper surface is reduced. A painting test using an acrylic pen shows that the surface of the paper has slight fuzzing.

[0039] Comparative Example 3: Taking production example 2 as an example, nanocellulose is not used in the surface sizing, that is, 100 parts of oxidized starch, 12 parts of aqueous wax emulsion, 8 parts of AKD, the concentration of the surface sizing solution is 7.5%, and the amounts of cationic starch, wet strength agent PAE, neutral sizing agent AKD and polyacrylamide retention agent added to the slurry remain unchanged. The produced paper is tested for surface strength of 16 levels (pulling rod method) after being pressed by two flat rollers, and the surface strength is reduced by 2 levels. A painting test with an acrylic pen shows that the surface of the paper has moderate fuzzing.

[0040] Comparative Example 4: Taking production example 2 as an example, the amount of cationic starch, wet strength agent PAE, neutral sizing agent AKD, polyacrylamide retention aid and surface sizing formula added to the pulp did not change, and the produced base paper was used directly without two-pass flat pressing treatment. The paper performance indicators are compared as follows: 200g / m 2 The technical performance indicators of acrylic pen painting paper are as follows in Table 6: Painting effect: Paper that has not been flattened has low density, high air permeability and low surface smoothness. When using acrylic pen for painting test, the result showed that the acrylic pen ink penetrated seriously and the paper surface was seriously scratched and fuzzed.

[0041] The neutral sizing agent AKD and PAE wet strength agent used in the production example were produced by Zibo Jinli Fine Chemical Co., Ltd., the water-based wax emulsion was produced by Shanghai Xinnuo Chemical Co., Ltd., and the nanocellulose was produced by Shandong Shengquan Group Co., Ltd.

Claims

1. A method for making acrylic pen drawing paper, characterized in that The steps of making the method are as follows: (1) Pulping: 30-80% coniferous pulp, 70-20% hardwood pulp. The coniferous pulp and hardwood pulp are crushed by a hydraulic pulper, mixed evenly, and then pulped by a double-disc pulper. The beating degree is 32-40 O SR; (2) Pulping: Mix the beaten softwood pulp and hardwood pulp in a mixing tank, and then add 1.0-1.8% of cationic starch dry strength agent; after the cationic starch dry strength agent is evenly mixed with the pulp, add 2.0-2.8% of PAE wet strength agent; (3) Internal sizing and dehydration: The prepared slurry is conveyed to the screen through the slurry flow system. The neutral sizing agent AKD is continuously added online in the slurry flow system to perform internal sizing on the paper. The amount of AKD neutral sizing agent is 1.0-2.0%, and 100-180ppm of cationic polyacrylamide retention aid is added. After the slurry is on the screen, it is dehydrated and formed through the screen to form a wet paper sheet. (4) Paper surface sizing: After the wet paper leaves are squeezed and dehydrated in the press section of the paper machine, they enter the drying cylinder for drying before surface sizing. The dried paper leaves enter the surface sizing machine for surface sizing treatment; (5) Drying after surface sizing: After surface sizing, the paper sheets are dried by hot air at a temperature of 140 degrees and a hot air drying channel length of 4 meters, and then dried by a drying cylinder to form acrylic paper base paper; (6) Pressing with a flat press: The base paper is pressed with a flat press at a pressure of 120-200 MPa. After the above treatment, acrylic pen painting paper suitable for acrylic pen painting is obtained.

2. The method for making acrylic pen drawing paper according to claim 1, characterized in that The softwood pulp in step (1) is preferably 40%, the hardwood pulp is preferably 60%, and the beating degree is preferably 36. O SR.

3. The method for making acrylic pen drawing paper according to claim 1, characterized in that The cationic starch gelatinization concentration in step (2) is 10.0%, the use concentration is 5.0%, the amount of cationic starch dry strength agent is preferably 1.6%, and the amount of PAE wet strength agent is preferably 2.4%.

4. The method for making acrylic pen drawing paper according to claim 1, characterized in that The dosage of the AKD neutral sizing agent in step (3) is preferably 1.6%, and the amount of the cationic polyacrylamide retention aid added is preferably 140 ppm.

5. The method for making acrylic pen drawing paper according to claim 1, characterized in that The paper sheet dried before surface sizing in step (4) has a dryness of 90-95%.

6. The method for making acrylic pen drawing paper according to claim 1, characterized in that The formula and proportion of the surface sizing solution in the surface sizing treatment in step (4) are: oxidized starch: 100 parts, aqueous wax emulsion: 10-18 parts, AKD: 5-10 parts, nanocellulose: 1-2 parts.

7. The method for making acrylic pen drawing paper according to claim 1, characterized in that In the step (4), the surface sizing solution concentration is 7.0-9.0%, and the surface glue coating amount is 1.0-3.0 g / m 2 , which is double-sided adhesive.

8. The method for making acrylic pen drawing paper according to claim 1, characterized in that In the step (6), the flat press uses two flat presses to compact the acrylic paper base paper. The flat press calendering roller is a chrome-plated roller with a surface roughness of 0.01um, and the bottom roller is a resin roller with a hardness of 100 Shore degrees.

9. The method for making acrylic pen drawing paper according to claim 8, characterized in that In the step (6), the distribution of the calender rollers and the resin rollers of the two calendering machines is as follows: the calender roller of the first calendering machine is on the top and the resin roller is on the bottom; the resin roller of the second calendering machine is on the top and the calender roller is on the bottom. After calendering, the paper density reaches 0.90-0.94g / cm3, the paper air permeability is 22-34ml / min, and the smoothness reaches 80-90s.

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