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CN-118727511-B - Glassine paper and production process thereof

CN118727511BCN 118727511 BCN118727511 BCN 118727511BCN-118727511-B

Abstract

The application relates to the technical field of papermaking, in particular to glassine paper and a production process thereof. The application aims to solve the problem of how to improve the oil resistance of glassine paper. According to the production process of the glassine paper, the wood fiber is subjected to alkali treatment, polyether, palm wax and pentaerythritol stearate are added for cooking, so that glue substances in the wood fiber can be removed, and the obtained wood fiber slurry, chitosan, cellulose, bamboo fiber slurry, mica and silicon dioxide are modified by dopamine, so that the oil resistance of the glassine paper can be improved. In addition, the glassine paper obtained by the method has high tightness, smoothness and glossiness, high strength, good oil resistance and excellent service performance.

Inventors

  • WU XIANBAO
  • LU CHONGBIN
  • WU PENGFEI
  • WANG LONG
  • WU XIAOYAN
  • YUE YUEZHEN
  • SHAN SHENGLAI

Assignees

  • 浙江哲丰新材料有限公司

Dates

Publication Date
20260505
Application Date
20240703

Claims (8)

  1. 1. A process for producing glassine paper, comprising: a) Adding an alkali solution with the mass concentration of 2-5% into wood fibers, steaming at 80-100 ℃ for 1-2 hours, cooling to normal temperature, adding polyether, palm wax and pentaerythritol stearate, steaming at 70-80 ℃ for 1-2 hours, pulping, and adjusting the concentration to obtain wood fiber slurry; b) Stirring wood fiber slurry, chitosan, cellulose, bamboo fiber slurry, mica and silicon dioxide for 0.5-1h at 30-40 ℃, adding tris (hydroxymethyl) aminomethane to adjust the pH value of the whole mixture to 8-9, and adding dopamine to react for 5-8h to obtain mixed slurry; c) Making, squeezing and drying the mixed slurry through a net part in sequence to obtain glassine base paper; d) Carrying out surface sizing on the glassine base paper, drying and calendaring to obtain glassine paper; the production process of the bamboo fiber slurry comprises the following steps: Adding alkaline solution with mass concentration of 2-5% into bamboo, steaming at 80-100 ℃ for 10-20h, pulping the steamed bamboo to obtain first bamboo fiber slurry with beating degree of 20-25 DEG SR, secondarily pulping 3/4 of the first bamboo fiber slurry to obtain second bamboo fiber slurry with beating degree of 25-30 DEG SR, and secondarily pulping 1/2 of the second bamboo fiber slurry to obtain third bamboo fiber slurry with beating degree of 30-35 DEG SR; Mixing the first, second and third bamboo fiber slurry to obtain bamboo fiber slurry; The silicon dioxide comprises small particle size of 0.1-1 mu m, micro particle size of 1-5 mu m and large particle size of 5-20 mu m in the mass ratio of (5-10): 1-2): 0.5-1; the beating degree of the wood fiber slurry is 35-40 DEG SR.
  2. 2. The production process according to claim 1, wherein the mass concentration of the bamboo fiber slurry is 10-15%.
  3. 3. The process according to claim 1, wherein the stirring is carried out during the cooking at a speed of 500-1000r/min.
  4. 4. The production process according to claim 1, wherein the mass concentration of the wood fiber slurry is 3-5%.
  5. 5. The production process according to claim 1, wherein the wood fiber pulp, chitosan, cellulose, bamboo fiber pulp, mica, silica, and dopamine ratio is 100 (0.5-1): (1-2): (2-5): (0.5-1): (1-2): (0.1-0.2).
  6. 6. The process according to claim 1, wherein the sizing agent used in the sizing process is paraffin emulsion, carboxymethyl cellulose or styrene-maleic anhydride copolymer.
  7. 7. The process according to claim 1, wherein the surface size coat weight is 10-30g/m2.
  8. 8. Glassine paper, characterized in that it is produced by the production process according to any one of claims 1 to 7.

Description

Glassine paper and production process thereof Technical Field The invention relates to the technical field of papermaking, in particular to glassine paper and a production process thereof. Background The glassine paper is industrial paper, and is prepared through the procedures of rewetting, supercalendering, silicone oil coating and the like. The glassine paper has compact and uniform texture, good internal strength and transparency, and is a common material for manufacturing bar code labels, self-adhesive tapes, adhesive tapes and sticky industrial products. The glassine paper has certain high temperature resistance, moisture resistance and oil resistance, and is generally used for packaging in the industries of food, medicine and the like, such as double-sided adhesive tape base material trademark, laser anti-counterfeiting mark and other release applications. But it has a large difference in oil resistance from abroad. Accordingly, there is a need in the art for a new solution to the above-mentioned problems. Disclosure of Invention In order to solve at least one of the above problems in the prior art, that is, to solve the problem of how to improve the oil resistance of glassine paper, the present application provides a production process of glassine paper, comprising: a) Adding an alkali solution with the mass concentration of 2-5% into wood fibers, steaming at 80-100 ℃ for 1-2 hours, cooling to normal temperature, adding polyether, palm wax and pentaerythritol stearate, steaming at 70-80 ℃ for 1-2 hours, pulping, and adjusting the concentration to obtain wood fiber slurry; b) Stirring wood fiber slurry, chitosan, cellulose, bamboo fiber slurry, mica and silicon dioxide for 0.5-1h at 30-40 ℃, adding tris (hydroxymethyl) aminomethane to adjust the pH value of the whole mixture to 8-9, and adding dopamine to react for 5-8h to obtain mixed slurry; c) Making, squeezing and drying the mixed slurry through a net part in sequence to obtain glassine base paper; d) And (3) carrying out surface sizing on the glassine base paper, drying and calendaring to obtain the glassine paper. In the preferred technical scheme of the production process, the production process of the bamboo fiber slurry comprises the following steps: Adding alkaline solution with mass concentration of 2-5% into bamboo, steaming at 80-100 ℃ for 10-20h, pulping the steamed bamboo to obtain first bamboo fiber slurry with beating degree of 20-25 DEG SR, secondarily pulping 3/4 of the first bamboo fiber slurry to obtain second bamboo fiber slurry with beating degree of 25-30 DEG SR, and secondarily pulping 1/2 of the second bamboo fiber slurry to obtain third bamboo fiber slurry with beating degree of 30-35 DEG SR; And mixing the first, second and third bamboo fiber slurry to obtain the bamboo fiber slurry. In the preferable technical scheme of the production process, the mass concentration of the bamboo fiber slurry is 10-15%. In the preferable technical scheme of the production process, the silicon dioxide comprises small particle size of 0.1-1 mu m, micro particle size of 1-5 mu m and large particle size of 5-20 mu m with the mass ratio of (5-10): 1-2): 0.5-1. In the preferable technical scheme of the production process, stirring is carried out in the cooking process, and the stirring speed is 500-1000r/min. In the preferable technical scheme of the production process, the beating degree of the wood fiber slurry is 35-40 DEG SR, and/or the mass concentration of the wood fiber slurry is 3-5%. In the preferable technical scheme of the production process, the wood fiber slurry, chitosan, cellulose, bamboo fiber slurry, mica, silicon dioxide and dopamine ratio is 100 (0.5-1): (1-2): (2-5): (0.5-1): (1-2): (0.1-0.2). In the preferred technical scheme of the production process, the sizing agent adopted in the sizing process is paraffin emulsion, carboxymethyl cellulose or styrene-maleic anhydride copolymer. In the preferred technical scheme of the production process, the surface sizing coating weight is 10-30g/m 2. The application also discloses glassine paper which is produced by the production process according to any preferable technical scheme. As can be appreciated by those skilled in the art, the production process of the glassine paper of the present application can remove gum substances in the wood fiber by alkali treatment of the wood fiber and adding polyether, palm wax and pentaerythritol stearate for cooking, and can improve the oil resistance of the glassine paper by modifying the obtained wood fiber pulp, chitosan, cellulose, bamboo fiber pulp, mica and silica with dopamine. In addition, the glassine paper obtained by the method has high tightness, smoothness and glossiness, high strength, good oil resistance and excellent service performance. Detailed Description The invention provides a production process of glassine paper, which comprises the following steps: a) Adding an alkali solution with the mass concentration of 2-5% into wood