CN110685188A - Production process of diamond lattice adhesive dispensing insulation paper - Google Patents
Production process of diamond lattice adhesive dispensing insulation paper Download PDFInfo
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- CN110685188A CN110685188A CN201810722539.6A CN201810722539A CN110685188A CN 110685188 A CN110685188 A CN 110685188A CN 201810722539 A CN201810722539 A CN 201810722539A CN 110685188 A CN110685188 A CN 110685188A
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- fiber
- paper
- polyimide
- base layer
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- 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
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
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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
Abstract
The invention discloses a production process of diamond lattice point-gluing insulating paper, which comprises the steps of beating polyimide fibers at a certain frequency, weight and concentration, adding a fiber dispersing agent, beating again after defibering, placing the polyimide fibers and aramid pulp in a fiber disperser according to a certain proportion, dispersing, then adding PEO, styrene-butadiene latex and CPAM into the fiber disperser, preparing polyimide fiber base paper by a wet papermaking method, dipping the polyimide base paper in a resin solution, enhancing the strength performance and electrical performance of an insulating paper base layer, softening and deforming the polyimide resins and the aramid pulp under the induction action of heat and pressure by hot pressing of the base layer under different conditions in three stages, bonding the polyimide fibers together, improving the bonding force and paper tension among fibers, improving various strengths of the diamond lattice point-gluing insulating paper produced by the production process, the service life is prolonged.
Description
Technical Field
The invention relates to the technical field of insulating paper production, in particular to a production process of diamond lattice point-gluing insulating paper.
Background
The insulating paper is a generic name of paper for electrical insulation. As an insulating material for various electric appliances such as cables and coils, conventional insulating paper is roughly classified into the following types: plant fiber insulating paper, mineral fiber insulating paper and synthetic fiber insulating paper, but present plant fiber insulating paper and mineral fiber insulating paper all can have the problem such as the easy ageing of long-term use, low strength, electric property is poor. Therefore, a production process of the diamond lattice point-gluing insulating paper is provided.
Disclosure of Invention
The invention aims to provide a production process of diamond lattice dispensing insulation paper, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a production process of diamond lattice point-gluing insulating paper comprises the following steps:
s1: manufacturing an insulating paper base layer;
s11: pulping the polyimide fibers, adding a fiber dispersing agent, and pulping again after defibering;
s12: placing polyimide fibers and aramid pulp in a fiber disperser, dispersing, and then adding PEO, styrene-butadiene latex and CPAM into the fiber disperser;
s13: preparing polyimide fiber base paper by a wet papermaking method;
s14: diluting polyimide resin by using DMAC (dimethylacetamide) to obtain resin solutions with different concentrations, and impregnating polyimide base paper in the resin solutions;
s15: hot-pressing the impregnated and dried fiber base paper in a hot press, then sticking the upper and lower surfaces of the fiber base paper with polyester fiber non-woven fabrics for electrical insulation, carrying out hot-pressing and rolling molding on the stuck composite material, and putting the rolled material into a curing oven for curing to prepare an insulating paper base layer;
s2: performing rhombus-shaped glue dispensing on two sides of the insulating paper base layer;
s21: coating modified epoxy resin on the rhombus-shaped gumming roller, and then coating the modified epoxy resin on the upper surface and the lower surface of the insulating paper base layer by using the gumming roller;
s22: and (4) putting the impregnated insulating paper base layer into a drying box for drying.
Preferably, in the operation of S11, the polyimide fiber is beaten under the conditions of a beating frequency of 20Hz, a weight of 3.5kg and a pulp concentration of 2%, and 0.05% of a fiber dispersant PEO is added for a disintegration time of 5min, followed by beating for 30 min.
Preferably, in the operation of S12, 94% of polyimide fiber and 6% of aramid pulp are placed in a fiber disperser and dispersed for 30000 revolutions, and then 0.06% of PEO, 8% of styrene-butadiene latex and 0.6% of CPAM are added to the fiber disperser.
Preferably, in the operation of S14, the polyimide base paper is impregnated in a resin solution, and the polyimide resin concentration is selected to be 4%.
Preferably, in the operation of S15, when the impregnated and dried fibrous base paper is hot-pressed, the hot-pressing conditions are as follows: the first stage is as follows: 120 deg.C, 5MPa, 3 min; and a second stage: 180 deg.C, 10MPa, 3 min; and a third stage: 230 ℃, 15MPa and 3 min.
Preferably, in the operation process of S15, the upper and lower surfaces of the fiber base paper are further bonded to the polyester fiber nonwoven fabric for electrical insulation, the bonded composite material is hot-pressed and then wound for molding, the hot-pressing temperature is 150 ℃, 5MPa and 3min, and then the composite material is placed into a curing oven for curing at 80 ℃ for 24 hours.
Preferably, in the operation process of S22, the impregnated insulation paper base layer is placed in a drying oven for drying, the selected drying temperature is 120 ℃, and the drying time is 2 min.
Compared with the prior art, the invention has the beneficial effects that: a production process of diamond lattice adhesive-dispensing insulation paper comprises the steps of manufacturing a special insulation paper base layer, pulping polyimide fibers under certain frequency, weight and concentration, adding 0.06% of PEO, 8% of styrene-butadiene latex and 0.6% of CPAM into the insulation paper base layer to increase the strength of the insulation paper base layer, then carrying out impregnation treatment to enhance the strength performance and the electrical performance of the insulation paper base layer, and leading the insulation paper base layer to be softened and deformed under the induction action of heat and pressure through hot pressing of three stages under different conditions, so that the polyimide fibers are bonded together, the bonding force and the paper tension among fibers are improved, the diamond lattice adhesive-dispensing insulation paper produced by the production process improves various strengths, and the service life is prolonged.
Detailed Description
The invention will be further described with reference to the following examples, to which, however, the scope of the invention is not limited.
A production process of diamond lattice point-gluing insulating paper is characterized by comprising the following technical process characteristics:
s1: manufacturing an insulating paper base layer;
s11: pulping the polyimide fibers, adding a fiber dispersing agent, and pulping again after defibering;
s12: placing polyimide fibers and aramid pulp in a fiber disperser for dispersing, and then adding PEO, styrene-butadiene latex and CPAM into the fiber disperser;
s13: preparing polyimide fiber base paper by a wet papermaking method, wherein the wet papermaking method is a conventional method for preparing base paper;
s14: diluting polyimide resin by using DMAC (dimethylacetamide) to obtain resin solutions with different concentrations, and impregnating polyimide base paper in the resin solutions;
s15: hot-pressing the impregnated and dried fiber base paper in a hot press, then sticking the upper and lower surfaces of the fiber base paper with polyester fiber non-woven fabrics for electrical insulation, carrying out hot-pressing and rolling molding on the stuck composite material, and putting the rolled material into a curing oven for curing to prepare an insulating paper base layer;
s2, performing rhombus dispensing on two sides of the insulating paper base layer;
s21: coating modified epoxy resin on the rhombus-shaped gumming roller, and then coating the modified epoxy resin on the upper surface and the lower surface of the insulating paper base layer by using the gumming roller;
s22: and (3) putting the impregnated insulation paper base layer into a drying box for drying to prepare the diamond lattice adhesive-coated insulation paper.
Specifically, in the operation process of S11, the polyimide fiber is subjected to beating treatment under the conditions of beating frequency of 20Hz, weight of 3.5kg and pulp concentration of 2%, when the beating frequency is 20Hz, weight of 3.5kg and pulp concentration of 2%, the polyimide chopped fiber has the best dispersion effect, so that the polyimide chopped fiber can be fully dispersed, the length of the polyimide chopped fiber is selected to be 3mm, 0.05% (relative to the absolutely dry fiber, the fibers appearing in the following list are also relative to the absolutely dry fiber) of the PEO (PEO is polyethylene oxide and has a number average molecular weight of about 300 ten thousand) is added, the defibering time is 5min and then 30min is beaten, the fiber bundle is dispersed into single fibers under the shearing force action between a bed knife and a fly knife and the friction action between the fibers through beating, the shearing force and the friction action on the chopped fiber can be adjusted by adjusting the weight and the pulp concentration, proper shear and friction facilitates the dispersion of the fiber bundles, but excessive shear tends to cut the fibers, thereby affecting the performance of the paper.
Specifically, in the operation process of S12, 94% of polyimide fiber and 6% of aramid pulp are placed in a fiber disperser, the beating degree of the aramid pulp is 55.5 DEG SR, the aramid pulp is dispersed for 30000 revolutions, then 0.06% of PEO, 8% of styrene-butadiene latex and 0.6% of CPAM are added into the fiber disperser, the solid content of the styrene-butadiene latex is 50%, the dosage of the styrene-butadiene latex has influence on the tensile index, the tearing index and the electrical breakdown strength, the CPAM is cationic polyacrylamide, the number average molecular weight is about 700 thousands, the tensile index and the tearing index of the polyimide base paper are increased and then decreased along with the increase of the dosage of the PEO, and experiments show that the strength performance of the polyimide base paper is best when the dosage of the PEO is 0.06%.
Specifically, in the operation of S14, the polyimide base paper is impregnated in a resin solution, the concentration of the polyimide resin is selected to be 4%, and the appropriate amount of impregnation can enhance the bonding force between fibers, thereby improving the strength and electrical properties of the paper.
Specifically, in the operation of S15, when hot pressing is performed on the impregnated and dried fibrous base paper, the conditions of hot pressing are as follows: the first stage is as follows: 120 deg.C, 5MPa, 3 min; and a second stage: 180 deg.C, 10MPa, 3 min; and a third stage: at 230 ℃, 15MPa and 3min, under the induction action of heat and pressure, the polyimide resin and the aramid pulp generate softening deformation, and polyimide fibers are bonded together, so that the bonding force between the fibers and the paper tension are improved.
Specifically, in the operation process of S15, the upper and lower surfaces of the fiber base paper are bonded to the polyester fiber nonwoven fabric for electrical insulation, the bonded composite material is hot-pressed and then wound to form, the hot-pressing temperature is 150 ℃, 5MPa and 3min, then the composite material is placed into a curing oven to cure at 80 ℃ for 24 hours, and the fiber base paper and the polyester fiber nonwoven fabric are formed into a stable insulation paper base layer after hot-pressing and curing.
Specifically, in the operation process of S22, the impregnated insulation paper base layer is placed in a drying oven for drying at the selected drying temperature of 120 ℃ for 2min, and the diamond-like adhesive-coated insulation paper made by selecting the appropriate drying temperature and drying time is more stable.
The working principle is as follows: a production process of diamond lattice point-gluing insulating paper comprises pulping polyimide fiber under the conditions of pulping frequency of 20Hz, weight of 3.5kg and pulp concentration of 2%, dispersing 94% of polyimide fiber and 6% of aramid pulp in a fiber disperser for 30000 turns, adding 0.06% of PEO, 8% of styrene-butadiene latex and 0.6% of CPAM, preparing polyimide fiber base paper by wet papermaking method, soaking the polyimide base paper in resin solution, hot pressing the soaked and dried fiber base paper, sticking the upper and lower surfaces of the fiber base paper with polyester fiber non-woven fabric for electrical insulation, hot pressing the rolled composite material, coating modified epoxy resin on a diamond lattice impregnation roller, impregnating the insulating paper base layer by the impregnation roller, and (3) putting the impregnated insulation paper base layer into a drying box for drying to prepare the diamond lattice adhesive-coated insulation paper.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (7)
1. The production process of the diamond-lattice adhesive dispensing insulating paper is characterized by comprising the following technical process characteristics:
s1: manufacturing an insulating paper base layer;
s11: pulping the polyimide fibers, adding a fiber dispersing agent, and pulping again after defibering;
s12: placing polyimide fibers and aramid pulp in a fiber disperser for dispersing, and then adding PEO, styrene-butadiene latex and CPAM into the fiber disperser;
s13: preparing polyimide fiber base paper by a wet papermaking method;
s14: diluting polyimide resin by using DMAC (dimethylacetamide) to obtain resin solutions with different concentrations, and impregnating polyimide base paper in the resin solutions;
s15: hot-pressing the impregnated and dried fiber base paper in a hot press, then sticking the upper and lower surfaces of the fiber base paper with polyester fiber non-woven fabrics for electrical insulation, carrying out hot-pressing and rolling molding on the stuck composite material, and putting the rolled material into a curing oven for curing to prepare an insulating paper base layer;
s2: performing rhombus-shaped glue dispensing on two sides of the insulating paper base layer;
s21: coating modified epoxy resin on the rhombus-shaped gumming roller, and then coating the modified epoxy resin on the upper surface and the lower surface of the insulating paper base layer by using the gumming roller;
s22: and (3) putting the impregnated insulation paper base layer into a drying box for drying to prepare the diamond lattice adhesive-coated insulation paper.
2. The production process of the rhombus dispensing insulation paper as claimed in claim 1, wherein in the operation process of S11, the polyimide fiber is beaten under the conditions that the beating frequency is 20Hz, the weight is 3.5kg and the pulp concentration is 2%, 0.05% of a fiber dispersant PEO is added, the defibering time is 5min, and then the beating is carried out for 30 min.
3. The process of claim 1, wherein in the step of S12, 94% of polyimide fiber and 6% of aramid pulp are placed in a fiber disperser and dispersed for 30000 turns, and then 0.06% of PEO, 8% of styrene-butadiene latex and 0.6% of CPAM are added to the fiber disperser.
4. The process for producing the rhombus dispensing insulation paper according to claim 1, wherein in the operation process of S14, the polyimide base paper is impregnated in a resin solution, and the concentration of the polyimide resin is selected to be 4%.
5. The production process of the rhombus dispensing insulation paper as claimed in claim 1, wherein in the operation process of S15, when the impregnated and dried fiber base paper is hot-pressed, the hot-pressing conditions are as follows: the first stage is as follows: 120 deg.C, 5MPa, 3 min; and a second stage: 180 deg.C, 10MPa, 3 min; and a third stage: 230 ℃, 15MPa and 3 min.
6. The process for producing the rhombus dispensing insulation paper according to claim 1, wherein in the operation process of S15, the upper and lower surfaces of the fiber base paper are adhered to the polyester fiber non-woven fabric for electrical insulation, the adhered composite material is hot-pressed and then rolled for molding, the hot-pressing temperature is 150 ℃, 5MPa and 3min, and then the composite material is put into a curing oven for curing at 80 ℃ for 24 hours.
7. The production process of the rhombus dispensing insulation paper according to claim 1, wherein in the operation process of S22, the impregnated insulation paper base layer is placed into a drying box for drying, the selected drying temperature is 120 ℃, and the drying time is 2 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810722539.6A CN110685188A (en) | 2018-07-04 | 2018-07-04 | Production process of diamond lattice adhesive dispensing insulation paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810722539.6A CN110685188A (en) | 2018-07-04 | 2018-07-04 | Production process of diamond lattice adhesive dispensing insulation paper |
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| CN110685188A true CN110685188A (en) | 2020-01-14 |
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| CN201810722539.6A Pending CN110685188A (en) | 2018-07-04 | 2018-07-04 | Production process of diamond lattice adhesive dispensing insulation paper |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007130898A (en) * | 2005-11-10 | 2007-05-31 | Toyobo Co Ltd | Heat-resistant insulation paper and its manufacturing method |
| CN101424060A (en) * | 2008-08-13 | 2009-05-06 | 黄顺国 | Diamond dotted glue composite dielectric paper and preparation method thereof |
| CN102953288A (en) * | 2012-11-02 | 2013-03-06 | 陕西科技大学 | Para-aramid pulp enhanced polyimide fiber paper preparation method |
| CN106223103A (en) * | 2016-07-27 | 2016-12-14 | 陕西科技大学 | A kind of preparation method of polyester meta-aramid extrusion coating paper |
| CN107217530A (en) * | 2017-08-02 | 2017-09-29 | 连云港纤维新材料研究院有限公司 | A kind of inclined-wire form method prepares the industrial method of polyimide fiber insulating paper |
-
2018
- 2018-07-04 CN CN201810722539.6A patent/CN110685188A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007130898A (en) * | 2005-11-10 | 2007-05-31 | Toyobo Co Ltd | Heat-resistant insulation paper and its manufacturing method |
| CN101424060A (en) * | 2008-08-13 | 2009-05-06 | 黄顺国 | Diamond dotted glue composite dielectric paper and preparation method thereof |
| CN102953288A (en) * | 2012-11-02 | 2013-03-06 | 陕西科技大学 | Para-aramid pulp enhanced polyimide fiber paper preparation method |
| CN106223103A (en) * | 2016-07-27 | 2016-12-14 | 陕西科技大学 | A kind of preparation method of polyester meta-aramid extrusion coating paper |
| CN107217530A (en) * | 2017-08-02 | 2017-09-29 | 连云港纤维新材料研究院有限公司 | A kind of inclined-wire form method prepares the industrial method of polyimide fiber insulating paper |
Non-Patent Citations (1)
| Title |
|---|
| 严美芳: "《印刷包装材料》", 31 October 2017, 文化发展出版社 * |
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Application publication date: 20200114 |
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