Manufacturing method of aramid paper handwriting notebook

Abstract

The invention discloses a method for manufacturing an aramid paper handwriting notebook, which comprises the following steps of: respectively manufacturing aramid chopped fibers and aramid fibrids into a block-shaped aramid plate and aramid paper, and calendaring at the temperature of 130-230 DEG C in the process of preparing the aramid paper; the method comprises the following steps: cutting aramid paper and an aramid plate, cutting the aramid paper and the aramid plate, taking the aramid plate as a shell, taking the aramid paper as paper sheets, preliminarily bonding the paper sheets through an aramid adhesive, and then welding through an ultrasonic interlayer welding technology to complete the binding process of the notebook so as to prepare the aramid paper handwriting notebook. According to the aramid paper handwriting notebook prepared by the invention, the surface of the aramid paper is prevented from being completely plasticized, so that the paper surface is more beneficial to writing and has no silver spots, the reading quality of the paper is greatly improved, and the aramid plate is adopted as the shell, so that the paper sheet is prevented from being curled.

Description

Technical Field

[0001] The invention belongs to the technical field of high-performance fiber application, and in particular relates to a method for manufacturing an aramid paper handwritten notebook. Background Art

[0002] Aramid paper is made of polyaramid fiber and is a new type of high-tech synthetic material. It has many advantages such as excellent flame retardancy, outstanding thermal stability, excellent electrical properties, superior mechanical properties, high chemical stability, and good lightweight properties. It is currently widely used in many fields such as national defense, aerospace, and high-speed rail facilities in countries around the world. Aramid paper not only has excellent mechanical and electrical properties, but also has good writing feel and ink absorption after being prepared by special processes. Compared with ordinary writing paper, aramid paper not only has the functions of ordinary writing paper, but also has the characteristics of high strength, fire resistance, high temperature resistance, hydrolysis resistance, chemical corrosion resistance, and insect and mold resistance.

[0003] Chinese patent document with application number 202311278853.7 discloses a method for preparing 1313 aramid paper of different colors, including aramid stock solution, adding nano-scale pigment to the aramid stock solution, and stirring it thoroughly to make the pigment evenly dispersed in the aramid stock solution. The feed pump conveys and the metering pump measures to spray the stock pulp from the spinneret to obtain chopped fibers, and then the colored aramid stock pulp is cut at high speed by a precipitator knife disc to form precipitated fibers, which are mixed and matched in proportion to make pulp, and then produced into colored aramid wool paper semi-finished products through an aramid paper inclined wire paper machine line, and finally hot-rolled by a hot rolling mill at high temperature and high pressure. The color of the aramid paper can be adjusted according to the customer's application requirements to meet the customer's different color needs. At the same time, the aramid paper produced has strong coloring power and will not fade even if it is stained with water. It is very affinity and can be used as a writing and painting paper.

[0004] The high-temperature calendering process used in the above-mentioned comparative documents improves the smoothness and glossiness of the aramid paper pages, but it will plasticize the surface of the aramid paper and produce silver spots, affecting the writing performance and reading experience. Moreover, the aramid paper lacks the protection of the outer shell, and the paper pages will curl after binding. Summary of the invention

[0005] In order to overcome the problems in the prior art, the present invention provides a method for making an aramid paper handwritten notebook. The prepared aramid paper handwritten notebook avoids complete plasticization of the aramid paper surface, making the paper surface more conducive to writing, and has no silver spots on the paper surface, which greatly improves the reading quality of the paper. In addition, an aramid board is used as the outer shell to avoid curling of paper pages.

[0006] In order to solve the above technical problems, the technical solution proposed by the present invention is: The present invention provides a method for making an aramid paper handwritten notebook, comprising the following steps: S1, dispersing aramid short-cut fibers and aramid fibrids in water to prepare a mixed pulp, passing the mixed pulp through a papermaking machine to form an aramid wet paper block, and then forming a block aramid board through high-temperature dehydration and hot pressing; S2, dispersing aramid short fibers and aramid fibrids in water to prepare a mixed pulp, passing the mixed pulp through a papermaking machine to form aramid wool paper, and then calendering the aramid wool paper using a low temperature and high pressure technology to obtain aramid paper, wherein the calendering temperature is 130-230° C.; S3, cutting the aramid board in step S1 and the aramid paper and aramid board in step S2, using the aramid board as the outer shell and the aramid paper as the paper pages, initially bonding the paper pages with an aramid adhesive, and then welding them with ultrasonic interlayer welding technology to complete the notebook binding process and prepare an aramid paper handwritten notebook.

[0007] The present invention adopts low temperature and high pressure technology, and performs calendering at a temperature of 130-230°C, so that the aramid paper will not be completely plasticized, and no silver spots will be generated, which is more conducive to writing and reading the aramid paper. When binding, the aramid board and the aramid paper and the aramid paper are firstly bonded by aramid adhesive, and then further fixed by ultrasonic interlayer welding technology, which can prevent damage in a high temperature environment and also avoid aging and loosening after long-term use or storage.

[0008] As an optional embodiment, in the preparation method provided by the present invention, in step S2, the pressure of the calendering treatment is 100-400 N / mm.

[0009] As an optional embodiment, in the preparation method provided by the present invention, in step S2, the calendering temperature of the calender is 170-230°C.

[0010] As an optional embodiment, in the preparation method provided by the present invention, in step S3, the time of the ultrasonic interlayer welding is 0.3-0.5 s, and the welding energy is 100-800 J.

[0011] As an optional embodiment, in the preparation method provided by the present invention, in step S3, the ultrasonic interlayer welding technology is to perform ultrasonic welding and fix one side after the aramid paper and aramid board or aramid paper and aramid paper are stacked, so as to achieve interlayer welding and allow the paper pages to turn normally.

[0012] As an optional embodiment, in the preparation method provided by the present invention, in step S3, the ultrasonic interlayer welding process includes the following steps: (1) Select a welding mold according to the length of the notebook, overlap one end of a piece of aramid paper with the aramid board and place it in the mold for one-time welding and fixing. Then overlap the other end of the aramid paper with another aramid board and place it in the mold for one-time welding and fixing. This allows the aramid board shell to turn pages smoothly, thus completing the welding of the aramid paper handwritten notebook shell.

[0013] (2) The ends of the bonded multi-layer aramid paper sheets are welded and fixed in one step to complete the welding of the writing paper sheets.

[0014] (3) The aramid paper in the aramid paper handwritten notebook shell in (1) is then bonded to the paper sheets obtained in (2) and then welded and fixed.

[0015] As an optional embodiment, in the ultrasonic interlayer welding process provided by the present invention, the welding time of the aramid paper handwritten notebook shell in step (1) is 0.3-1.0 s, and the welding energy is 100-300 J.

[0016] As an optional embodiment, in the ultrasonic interlayer welding process provided by the present invention, the welding time of the bonded multi-layer aramid paper sheets in step (2) is 1.5--6.0 s, and the welding energy is 400-800 J.

[0017] As an optional embodiment, in the ultrasonic interlayer welding process provided by the present invention, the welding time in step (3) is 0.6-1.5 s, and the welding energy is 200-500 J.

[0018] As an optional embodiment, in the preparation method provided by the present invention, in step S1, the temperature of hot pressing and shaping is 150-350° C., and the pressure is 3-30 MPa.

[0019] As an optional embodiment, in the preparation method provided by the present invention, in step S1, the basis weight of the aramid wet paper block is 800-4000 g / m 2 .

[0020] As an optional embodiment, in the preparation method provided by the present invention, in step S2, the basis weight of the aramid wool paper is 40-120 g / m 2 .

[0021] As an optional embodiment, in the preparation method provided by the present invention, in step S1, the thickness of the aramid board is 0.5-4.0 mm.

[0022] As an optional embodiment, in the preparation method provided by the present invention, in step S3, the cutting size of the aramid board is: 165-325 mm in length, 105-225 mm in width; the cutting size of the aramid paper is: 160-320 mm in length, 100-220 mm in width.

[0023] Compared with the prior art, the present invention has the following beneficial effects: When preparing the aramid paper in the present invention, a low-temperature and high-pressure calendering process is adopted, which can avoid the surface of the aramid board from being completely plasticized, making the paper surface more conducive to writing; and after low-temperature calendering, there is no silver spot on the paper surface, which greatly improves the reading quality of the paper. At the same time, the aramid board is used as the shell of the notebook, which has a certain hardness and weight, can maintain the flatness of the paper page, increase the wear resistance of the notebook shell, and is not easy to be damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 This is a schematic diagram of the aramid paper handwritten notebook prepared in Example 1; Figure 2 This is a comparison chart of the aramid paper handwritten notebook pages prepared in Example 1 and Comparative Example 1. DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively and meticulously below in conjunction with the accompanying drawings and preferred embodiments of the present invention, but the protection scope of the present invention is not limited to the following specific embodiments.

[0027] Unless otherwise defined, all professional terms used below have the same meanings as those generally understood by those skilled in the art. The professional terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of the present invention.

[0028] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present invention can be purchased from the market or prepared by existing methods.

[0029] Example 1 A method for making an aramid paper handwritten notebook comprises the following steps: (1) Aramid short-cut fibers and aramid fibrids are dispersed in water and mixed into mixed pulp after pulping, decomposition and purification. The mixed pulp is made into aramid wet paper blocks through a papermaking machine, a forming cylinder, etc., with a basis weight of 2500g / m 2 The aramid wet paper block is sent into a high-temperature plate pressing machine, and is subjected to high-temperature and high-pressure dehydration and hot pressing to shape the aramid paper. The temperature is 300°C and the pressure is 20MPa to produce a block of aramid paper with a smooth and hard surface. The thickness is 2.5mm.

[0030] (2) Aramid short fibers and aramid fibrids are dispersed in water and mixed into mixed pulp after pulping, debonding and purification. The mixed pulp is made into rolled aramid wool paper by a papermaking machine with a basis weight of 90 g / m 2 The aramid wool paper was calendered by a calendering machine, the calendering temperature was 200°C, the calendering pressure was 300N / mm, and the thickness was 0.15mm.

[0031] (3) The aramid board and the aramid paper are cut to size, the aramid board is made into the cover of the handwritten notebook, and the aramid paper is made into the paper pages of the handwritten notebook.

[0032] (4) The aramid paper pages are first bonded with aramid adhesive and then fixed with ultrasonic interlayer welding technology: during welding, a suitable welding mold is selected according to the length of the notebook, one end of a piece of aramid paper is stacked with the aramid board and placed on the surface of the lower mold, and the upper mold and the lower mold are used to perform a one-time welding fixation, and then the other end of the aramid paper is stacked with another aramid board and placed on the surface of the lower mold, and the upper mold and the lower mold are used to perform a one-time welding fixation, the welding time is 0.8s, the welding energy is 250J, and the welding of the notebook shell is completed; then the ends of the bonded multi-layer aramid paper pages are welded and fixed in a one-time manner, the welding time is 3.0s, the welding energy is 600J, the aramid board shell can turn pages smoothly, and the welding of the written paper pages is completed; finally, the aramid paper on the shell is bonded to the paper and welded and fixed in a one-time manner, the welding time is 1.0s, and the welding energy is 400J; finally, the binding process of the handwritten notebook is completed, and the handwritten notebook is made into a finished product, as shown in the schematic diagram. Figure 1 shown.

[0033] Example 2 A method for making an aramid paper handwritten notebook comprises the following steps: (1) Aramid short fibers and aramid fibrils are dispersed in water and mixed into mixed pulp after pulping, delamination and purification. The mixed pulp is passed through a papermaking machine, a forming cylinder, etc. to form an aramid wet paper block with a basis weight of 4000 g / m 2The wet aramid paper block is sent into a high-temperature plate pressing machine, and is subjected to high-temperature and high-pressure dehydration and hot pressing to shape the paper. The temperature is 350°C and the pressure is 30MPa to produce a block-shaped aramid plate with a smooth and hard surface and a thickness of 4.0mm.

[0034] (2) Aramid short fibers and aramid fibrids are dispersed in water and mixed into mixed pulp after pulping, descaling and purification. The mixed pulp is made into rolled aramid wool paper by a papermaking machine with a basis weight of 120 g / m 2 The aramid wool paper was calendered using a hot press and a calendering machine. The calendering temperature was 230°C, the calendering pressure was 400N / mm, and the thickness was 0.20mm.

[0035] (3) The aramid board and the aramid paper are cut to size, the aramid board is made into the cover of the handwritten notebook, and the aramid paper is made into the paper pages of the handwritten notebook.

[0036] (4) The aramid board and aramid paper, and the aramid paper pages are first bonded with aramid adhesive, and then fixed with ultrasonic interlayer welding technology: during welding, select a suitable welding mold according to the length of the notebook, overlap one end of a piece of aramid paper with the aramid board and place it on the surface of the lower mold, and use the upper mold and the lower mold to perform a one-time welding fixation, then overlap the other end of the aramid paper with another aramid board and place it on the surface of the lower mold, and use the upper mold and the lower mold to perform a one-time welding fixation, the welding time is 1.0s, the welding energy is 300J, and the welding of the notebook shell is completed; then, the ends of the bonded multi-layer aramid paper pages are welded and fixed in a one-time molding, the welding time is 5.0s, and the welding energy is 800J. The aramid board shell can turn the pages smoothly, and the welding of the written paper pages is completed; finally, the aramid paper on the shell is bonded to the paper and welded and fixed in a one-time molding, the welding time is 1.5s, and the welding energy is 500J; finally, the binding process of the handwritten notebook is completed, and the handwritten notebook is made into a finished product.

[0037] Example 3 A method for making an aramid paper handwritten notebook comprises the following steps: (1) Aramid short-cut fibers and aramid fibrids are dispersed in water and mixed into mixed pulp after pulping, decomposition and purification. The mixed pulp is made into aramid wet paper blocks through a papermaking machine, a forming cylinder, etc., with a basis weight of 1000g / m 2 The wet aramid paper block is sent into a high-temperature plate pressing machine, and is subjected to high-temperature and high-pressure dehydration and hot pressing to shape the paper. The temperature is 250°C and the pressure is 5 MPa to produce a block-shaped aramid plate with a smooth and hard surface and a thickness of 1.0 mm.

[0038] (2) Aramid short fibers and aramid fibrils are dispersed in water and mixed into mixed pulp after pulping, debonding and purification. The mixed pulp is made into rolled aramid wool paper by a papermaking machine with a basis weight of 50 g / m2 The aramid wool paper was calendered using a hot press and a calendering machine. The calendering temperature was 170°C, the calendering pressure was 100N / mm, and the thickness was 0.08mm.

[0039] (3) The aramid board and the aramid paper are cut to size, the aramid board is made into the cover of the handwritten notebook, and the aramid paper is made into the paper pages of the handwritten notebook.

[0040] (4) The aramid board and aramid paper, and the aramid paper pages are first bonded with aramid adhesive, and then fixed with ultrasonic interlayer welding technology: during welding, a suitable welding mold is selected according to the length of the notebook, one end of a piece of aramid paper is stacked with the aramid board and placed on the surface of the lower mold, and the upper mold and the lower mold are used to perform a one-time welding fixation, and then the other end of the aramid paper is stacked with another aramid board and placed on the surface of the lower mold, and the upper mold and the lower mold are used to perform a one-time welding fixation, the welding time is 0.3s, the welding energy is 100J, and the welding of the notebook shell is completed; then the ends of the bonded multi-layer aramid paper pages are fixed by a one-time welding fixation, the welding time is 1.5s, the welding energy is 400J, the aramid board shell can turn pages smoothly, and the welding of the written paper pages is completed; finally, the aramid paper on the shell is bonded to the paper and fixed by a one-time welding fixation, the welding time is 0.6s, and the welding energy is 200J; finally, the binding process of the handwritten notebook is completed, and the handwritten notebook is made into a finished product.

[0041] Example 4 A method for making an aramid paper handwritten notebook comprises the following steps: (1) Aramid short-cut fibers and aramid fibrids are dispersed in water and mixed into mixed pulp after pulping, decomposition and purification. The mixed pulp is made into aramid wet paper blocks through a papermaking machine, a forming cylinder, etc., with a basis weight of 3000g / m 2 The wet aramid paper block is sent into a high-temperature plate pressing machine, and is subjected to high-temperature and high-pressure dehydration and hot pressing to shape the block aramid board with a smooth and hard surface and a thickness of 3.0 mm at a temperature of 320°C and a pressure of 25 MPa.

[0042] (2) Aramid short fibers and aramid fibrils are dispersed in water and mixed into mixed pulp after pulping, debonding and purification. The mixed pulp is made into rolled aramid wool paper by a papermaking machine with a basis weight of 72 g / m 2 The aramid wool paper was calendered using a hot press and a calendering machine. The calendering temperature was 200°C, the calendering pressure was 280N / mm, and the thickness was 0.12mm.

[0043] (3) The aramid board and the aramid paper are cut to size, the aramid board is made into the cover of the handwritten notebook, and the aramid paper is made into the paper pages of the handwritten notebook.

[0044] (4) The aramid board and aramid paper, and the aramid paper pages are first bonded with aramid adhesive, and then fixed by ultrasonic interlayer welding technology: during welding, a suitable welding mold is selected according to the length of the notebook, one end of a piece of aramid paper is stacked with the aramid board and placed on the surface of the lower mold, and the upper mold and the lower mold are used to perform a one-time welding fixation, and then the other end of the aramid paper is stacked with another aramid board and placed on the surface of the lower mold, and the upper mold and the lower mold are used to perform a one-time welding fixation, the welding time is 0.6s, the welding energy is 200J, and the welding of the notebook shell is completed; then the ends of the bonded multi-layer aramid paper pages are fixed by a one-time welding fixation, the welding time is 2.0s, the welding energy is 500J, the aramid board shell can turn pages smoothly, and the welding of the written paper pages is completed; finally, the aramid paper on the shell is bonded to the paper and fixed by a one-time welding fixation, the welding time is 1.0s, and the welding energy is 350J; finally, the binding process of the handwritten notebook is completed, and the handwritten notebook is made into a finished product.

[0045] Comparative Example 1 The difference from Example 1 is that the calendering temperature in step (2) is 260° C., and the remaining steps are the same as in Example 1.

[0046] Comparative Example 2 The difference from Example 1 is that the calendering temperature in step (2) is 100° C., and the remaining steps are the same as in Example 1.

[0047] Comparative Example 3 The difference from Example 1 is that in step (4), only aramid adhesive is used for bonding, and ultrasonic interlayer welding is not used. The remaining steps are the same as in Example 1.

[0048] Comparative Example 4 The difference from Example 1 is that in step (4), aramid adhesive is not used, and only ultrasonic interlayer welding is used. The remaining steps are the same as in Example 1.

[0049] The notebooks prepared in the embodiment and the comparative example were tested, and the results are shown in Table 1 below.

[0050] Table 1: Performance test of notebooks prepared in the examples and comparative examples

[0051] The paper pages of the notebooks prepared in Example 1 and Comparative Example 1 are shown in FIG. Figure 2 As shown, the paper surface of Example 1 is normal in appearance, while the paper surface of Comparative Example 1 has silver spots.

[0052] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the scope of protection of the present invention.

Claims

1. A method for making an aramid paper handwritten notebook, characterized in that: The following steps are involved: S1, dispersing aramid short-cut fibers and aramid fibrids in water to prepare a mixed pulp, passing the mixed pulp through a papermaking machine to form an aramid wet paper block, and then forming a block aramid board through high-temperature dehydration and hot pressing; S2, dispersing aramid short fibers and aramid fibrids in water to prepare a mixed pulp, passing the mixed pulp through a papermaking machine to form aramid wool paper, and then calendering the aramid wool paper using a low temperature and high pressure technology to obtain aramid paper, wherein the calendering temperature is 130-230° C.; S3, cutting the aramid board in step S1 and the aramid paper and aramid board in step S2, using the aramid board as the outer shell and the aramid paper as the paper pages, initially bonding the paper pages with an aramid adhesive, and then welding them with ultrasonic interlayer welding technology to complete the notebook binding process and prepare an aramid paper handwritten notebook.

2. The method for making an aramid paper handwritten notebook according to claim 1, characterized in that: In step S2, the pressure of the calendering treatment is 100-400 N / mm.

3. The method for making an aramid paper handwritten notebook according to claim 1, characterized in that: In step S2, the calendering temperature of the calender is 170-230°C.

4. The method for making an aramid paper handwritten notebook according to claim 1, characterized in that: In step S3, the ultrasonic interlayer welding time is 0.3-5.0 s, and the welding energy is 100-800 J.

5. The method for making an aramid paper handwritten notebook according to claim 1, characterized in that: In step S3, the ultrasonic interlayer welding technology is to perform ultrasonic welding and fix one side of the aramid paper and the aramid board or the aramid paper and the aramid paper after they are stacked, so as to achieve interlayer welding and enable the paper pages to be turned normally.

6. The method for making an aramid paper handwritten notebook according to claim 1, characterized in that: In step S3, the ultrasonic interlayer welding process includes the following steps: (1) Select a welding mold according to the length of the notebook, stack one end of a piece of aramid paper with the aramid board and place it in the mold for one-time welding and fixing, then stack the other end of the aramid paper with another aramid board and place it in the mold for one-time welding and fixing, so that the aramid board shell can turn pages smoothly, completing the welding of the aramid paper handwritten notebook shell; (2) The ends of the bonded multi-layer aramid paper sheets are welded and fixed in one step to complete the welding of the writing paper sheets; (3) The aramid paper in the aramid paper handwritten notebook shell in (1) is then bonded to the paper sheets obtained in (2) and then welded and fixed.

7. The method for making an aramid paper handwritten notebook according to claim 6, characterized in that: In step (1), the welding time of the aramid paper handwritten notebook shell is 0.3-1.0 s, and the welding energy is 100-300 J.

8. The method for making an aramid paper handwritten notebook according to claim 6, characterized in that: The welding time of the multi-layer aramid paper sheets bonded in step (2) is 1.5--6.0 s, and the welding energy is 400-800 J.

9. The method for making an aramid paper handwritten notebook according to claim 6, characterized in that: The welding time in step (3) is 0.6-1.5 s, and the welding energy is 200-500 J.

10. The method for making an aramid paper handwritten notebook according to claim 1, characterized in that: In step S1, the aramid wet paper block has a basis weight of 800-4000 g / m 2 In step S2, the aramid wool paper has a basis weight of 40-120 g / m 2 ; In step S1, the temperature of hot pressing is 150-350°C and the pressure is 3-30MPa.

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