CN111893795A - Fiber mica paper and production method thereof - Google Patents

Fiber mica paper and production method thereof Download PDF

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Publication number
CN111893795A
CN111893795A CN202010905041.0A CN202010905041A CN111893795A CN 111893795 A CN111893795 A CN 111893795A CN 202010905041 A CN202010905041 A CN 202010905041A CN 111893795 A CN111893795 A CN 111893795A
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fiber
mica
polyvinyl chloride
aramid
slurry
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Chinese (zh)
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杨太军
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Wuhan Qihuiyize Technology Co ltd
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Wuhan Qihuiyize Technology Co ltd
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/10—Organic non-cellulose fibres
    • D21H13/20—Organic non-cellulose fibres from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H13/26—Polyamides; Polyimides
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/36—Inorganic fibres or flakes
    • D21H13/38—Inorganic fibres or flakes siliceous
    • D21H13/44—Flakes, e.g. mica, vermiculite

Abstract

The invention discloses fiber mica paper, which comprises the following specific components: aramid fiber 1313: 5% -10%; polyvinyl chloride fiber: 5% -15%; 1.5% -2% of polyoxyethylene, mica: 75% -90%; the production method comprises the following steps: (1) preparing mica slurry: cleaning, baking and pulping the mica sheets to prepare mica slurry with the concentration of 9-11%; (2) soaking polyvinyl chloride fiber: putting the polyvinyl chloride fiber into isopropanol to be easily soaked and dispersed, so that the concentration of the polyvinyl chloride fiber is 20-30%; (3) soaking aramid fibers 1313: soaking and dispersing aramid fiber 1313 in water to a concentration of 25% -35%; (4) preparing slurry: according to the aramid fiber 1313: 5% -10%, aramid fiber 1313: 5% -10%; polyvinyl chloride fiber: 5% -15%; 1.5% -2% of polyoxyethylene, mica: mixing the raw materials in a ratio of 75-90% to obtain mixed slurry; (5) papermaking: and (4) making the mixed slurry in the step (4) into paper. The polyvinyl chloride fiber and the aramid fiber 131 are added, so that the physical characteristics of the mica paper are improved, and the production cost is greatly reduced.

Description

Fiber mica paper and production method thereof
Technical Field
The invention relates to the technical field of mica paper production, in particular to fiber mica paper and a production method thereof.
Background
Mica is a rock-making mineral, presents a hexagonal flaky crystal form, has a layered structure inside mica crystal, is mainly hexagonal flaky crystal, has the characteristics of insulation, high temperature resistance and the like, is widely applied to the industries of coating, paint, electrical insulation and the like, is paper processed by taking mica as a main material, is widely used in the field of motor insulation, has the advantages of higher and higher power, smaller and smaller volume and higher requirement on insulation along with the technological progress of various motors, has higher and higher requirement on the mica paper, is frequently added with other materials in mica paper in the traditional technology to improve the physical properties of the mica paper, is prepared by using 6-15% of aramid fiber 1313 and 85-94% of mica as materials in the patent with the patent publication number of CN 102763A to improve the strength and the dielectricity of the mica paper, uses 5-20% of polyvinyl chloride fiber in the patent with the patent publication number of CN 104141263B, the fiber mica paper is made of materials with the mica content of 80-95% so as to reduce the production cost, but a method for making the mica paper by using the aramid fiber 1313 and the polyvinyl chloride fiber as raw materials is rarely proposed.
Disclosure of Invention
The invention aims to provide fiber mica paper and a production method thereof, which aim to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the fiber mica paper comprises the following specific components in parts by weight:
aramid fiber 1313: 5% -10%; polyvinyl chloride fiber: 5% -15%; 1.5% -2% of polyoxyethylene, mica: 75 to 90 percent.
A production method of fiber mica paper comprises the following specific steps:
(1) preparing mica slurry: cleaning, baking and pulping the mica sheets to prepare mica slurry with the concentration of 9-11%.
(2) Soaking polyvinyl chloride fiber: the polyvinyl chloride fiber is put into isopropanol to be easily soaked and dispersed, so that the concentration of the polyvinyl chloride fiber is 20-30%.
(3) Soaking aramid fibers 1313: soaking and dispersing the aramid fiber 1313 in water to make the concentration of the aramid fiber 1313 to be 25% -35%,
(4) preparing slurry: according to the aramid fiber 1313: 5% -10%, polyvinyl chloride fiber: 5% -15%; 1.5% -2% of polyoxyethylene, mica: mixing the raw materials according to the proportion of 75-90% to form mixed slurry.
(5) Papermaking: and (4) making the mixed slurry in the step (4) into paper.
Preferably, the mica sheet with the area of 4-6 square centimeters and the thickness of 1-4 millimeters is taken as a raw material.
Preferably, the length of the polyvinyl chloride fiber is 1.5 mm-2 mm.
Preferably, the aramid fiber 1313 has a length of 1 mm to 1.5 mm.
Preferably, the baking temperature in the step (1) is 800-950 ℃, and the baking time is 45-60 minutes.
Preferably, the soaking time of the polyvinyl chloride fiber in the step (2) is 30-40 minutes.
Preferably, the soaking time of the aramid fiber 1313 in the step (3) is 30 to 40 minutes.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the physical characteristics of the mica paper can be improved and the production cost is greatly reduced by adding the polyvinyl chloride fiber and the aramid fiber 131;
2. the invention has excellent dispersion function to the aramid fiber and mica powder by adding polyoxyethylene, thereby greatly improving the physical property of the fiber mica paper.
Drawings
FIG. 1 is a schematic diagram of the preparation steps of a fiber mica paper of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The invention provides a technical scheme that: the fiber mica paper comprises the following specific components in parts by weight:
aramid fiber 1313: 10 percent; polyvinyl chloride fiber: 5 percent; polyethylene oxide 1.5%, mica: 83.5 percent;
the mica area is 4 square centimeters, the mica sheet with the thickness of 1 millimeter is taken as the raw material, and the length of the polyvinyl chloride fiber is 1.5 millimeters. The aramid fiber 1313 has a length of 1 mm.
Referring to fig. 1, a fiber mica paper and a method for producing the same includes the following steps:
(1) preparing mica slurry: cleaning, baking and pulping the mica sheets to prepare mica slurry with the concentration of 9-11%.
(2) Soaking polyvinyl chloride fiber: the polyvinyl chloride fiber is put into isopropanol to be easily soaked and dispersed, so that the concentration of the polyvinyl chloride fiber is 20 percent.
(3) Soaking aramid fibers 1313: soaking the aramid fiber 1313 in water to disperse the aramid fiber to a concentration of 25%,
(4) preparing slurry: aramid fiber 1313: 10 percent; polyvinyl chloride fiber: 5 percent; polyethylene oxide 1.5%, mica: 83.5 percent of the mixture ratio, and mixing the raw materials into mixed slurry.
(5) Papermaking: and (4) making the mixed slurry in the step (4) into paper.
The baking temperature in the step (1) is 800 ℃, and the baking time is 45-60 minutes; the soaking time of the polyvinyl chloride fiber in the step (2) is 30 minutes; the soaking time of the aramid fiber 1313 in the step (3) is 30 minutes.
Example 2
The invention provides a technical scheme that: the fiber mica paper comprises the following specific components in parts by weight:
aramid fiber 1313: 5 percent; polyvinyl chloride fiber: 10 percent; polyethylene oxide 2%, mica: 83 percent.
The mica area is 4 square centimeters, the mica sheet with the thickness of 1 millimeter is taken as the raw material, and the length of the polyvinyl chloride fiber is 1.5 millimeters. The aramid fiber 1313 has a length of 1 mm.
Referring to fig. 1, a method for producing fiber mica paper includes the following steps:
(1) preparing mica slurry: cleaning, baking and pulping the mica sheets to prepare mica slurry with the concentration of 9-11%.
(2) Soaking polyvinyl chloride fiber: the polyvinyl chloride fiber is put into isopropanol to be easily soaked and dispersed, so that the concentration of the polyvinyl chloride fiber is 20 percent.
(3) Soaking aramid fibers 1313: soaking the aramid fiber 1313 in water to disperse the aramid fiber to a concentration of 25%,
(4) preparing slurry: aramid fiber 1313: 5 percent; polyvinyl chloride fiber: 10 percent; polyethylene oxide 2%, mica: the raw materials are mixed and mixed into slurry according to the proportion of 83 percent.
(5) Papermaking: and (4) making the mixed slurry in the step (4) into paper.
The baking temperature in the step (1) is 800 ℃, and the baking time is 50 minutes; the soaking time of the polyvinyl chloride fiber in the step (2) is 35 minutes; the soaking time of the aramid fiber 1313 in the step (3) is 35 minutes.
The specific gravity of the polyvinyl chloride fiber is increased, the specific gravity of the aramid fiber 1313 is reduced, and the production cost is reduced.
Example 3
The invention provides a technical scheme that: the fiber mica paper comprises the following specific components in parts by weight:
aramid fiber 1313: 10 percent; polyvinyl chloride fiber: 15 percent; polyethylene oxide 2%, mica: 73 percent.
The mica area is 4 square centimeters, the mica sheet with the thickness of 1 millimeter is taken as the raw material, and the length of the polyvinyl chloride fiber is 1.5 millimeters. The aramid fiber 1313 has a length of 1 mm.
Referring to fig. 1, a method for producing fiber mica paper includes the following steps:
(1) preparing mica slurry: cleaning, baking and pulping the mica sheets to prepare mica slurry with the concentration of 9-11%.
(2) Soaking polyvinyl chloride fiber: the polyvinyl chloride fiber is put into isopropanol to be easily soaked and dispersed, so that the concentration of the polyvinyl chloride fiber is 20-30%.
(3) Soaking aramid fibers 1313: soaking and dispersing the aramid fiber 1313 in water to make the concentration of the aramid fiber 1313 to be 25% -35%,
(4) preparing slurry: according to the aramid fiber 1313: 5% -10%, polyvinyl chloride fiber: 5% -15%; 1.5% -2% of polyoxyethylene, mica: mixing the raw materials according to the proportion of 75-90% to form mixed slurry.
(5) Papermaking: and (4) making the mixed slurry in the step (4) into paper.
The baking temperature in the step (1) is 950 ℃, and the baking time is 60 minutes; the soaking time of the polyvinyl chloride fiber in the step (2) is 40 minutes; the soaking time of the aramid fiber 1313 in the step (3) is 40 minutes.
The aramid fiber 1313 and the polyvinyl chloride fiber in the maximum proportion are adopted, so that the physical properties and the dielectric properties of the fiber mica paper are greatly improved.
The working principle is as follows: the physical properties of the mica fiber paper can be improved by adding the aramid fiber 1313 and the polyvinyl chloride fiber into mica, the using amount of the aramid fiber 1313 can be reduced by adding the polyvinyl chloride fiber, the production cost is reduced, and the aramid fiber can be rapidly dispersed by adding polyethylene oxide.
Comparative example 1:
the fiber mica paper comprises the following specific components in parts by weight: aramid fiber 1313: 10 percent; polyethylene oxide 1.5%, mica: 88.5 percent.
Mica sheet with the area of 4 square centimeters and the thickness of 1 millimeter is taken as a raw material, and the length of the aramid fiber 1313 is 1 millimeter.
(1) Preparing mica slurry: cleaning, baking and pulping the mica sheets to prepare mica slurry with the concentration of 9-11%.
(2) Soaking aramid fibers 1313: soaking and dispersing the aramid fiber 1313 in water to make the concentration of the aramid fiber 1313 to be 25% -35%,
(3) preparing slurry: according to the aramid fiber 1313: 5% -10%, polyvinyl chloride fiber: 5% -15%; 1.5% -2% of polyoxyethylene, mica: mixing the raw materials according to the proportion of 75-90% to form mixed slurry.
(4) Papermaking: and (4) making the mixed slurry in the step (4) into paper.
The baking temperature in the step (1) is 800 ℃, and the baking time is 60 minutes; the soaking time of the aramid fiber 1313 in the step (3) is 40 minutes.
The fiber mica paper prepared in the above examples 1 to 3 and comparative example 1 was cut and formed into test strips, and the test results are shown in Table 1:
table 1:
Figure 439114DEST_PATH_IMAGE001
as can be seen from table 1 above, the tensile strength of the paper can be improved by adding the aramid fiber 1313 and the polyvinyl chloride fiber, and the paper still has higher tensile strength and the production cost is reduced under the condition that the dosage of the aramid fiber 1313 is reduced and the dosage of the polyvinyl chloride fiber is increased.
Note: the tests in Table 1 were carried out according to the test method of GB7195-87 mica paper.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. A fiber mica paper is characterized in that: the specific components by weight are as follows:
aramid fiber 1313: 5% -10%; polyvinyl chloride fiber: 5% -15%; 1.5% -2% of polyoxyethylene, mica: 75 to 90 percent.
2. A preparation method of fiber mica paper comprises the following specific steps:
(1) preparing mica slurry: cleaning, baking and pulping the mica sheets to prepare 9-11% mica slurry,
(2) soaking polyvinyl chloride fiber: the polyvinyl chloride fiber is put into isopropanol to be easily soaked and dispersed, the concentration of the polyvinyl chloride fiber is 20-30 percent,
(3) soaking aramid fibers 1313: soaking and dispersing the aramid fiber 1313 in water to make the concentration of the aramid fiber 1313 to be 25% -35%,
(4) preparing slurry: according to the aramid fiber 1313: 5% -10%, aramid fiber 1313: 5% -10%; polyvinyl chloride fiber: 5% -15%; 1.5% -2% of polyoxyethylene, mica: mixing the raw materials according to the proportion of 75-90 percent to form mixed slurry,
(5) papermaking: and (4) making the mixed slurry in the step (4) into paper.
3. A fibrous mica paper according to claim 1, characterized in that: the mica sheet with the area of 4-6 square centimeters and the thickness of 1-4 millimeters is used as a raw material.
4. A fibrous mica paper according to claim 1, characterized in that: the length of the polyvinyl chloride fiber is 1.5 mm-2 mm.
5. A fibrous mica paper according to claim 1, characterized in that: the length of the aramid fiber 1313 is 1 mm to 1.5 mm.
6. The method for preparing fiber mica paper according to claim 2, characterized in that: the baking temperature in the step (1) is 800-950 ℃, and the baking time is 45-60 minutes.
7. The method for preparing fiber mica paper according to claim 2, characterized in that: the soaking time of the polyvinyl chloride fiber in the step (2) is 30-40 minutes.
8. The method for preparing fiber mica paper according to claim 2, characterized in that: the soaking time of the aramid fiber 1313 in the step (3) is 30-40 minutes.
CN202010905041.0A 2020-09-01 2020-09-01 Fiber mica paper and production method thereof Withdrawn CN111893795A (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
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Application publication date: 20201106