CN102953290A - Meta-aramid precipitation fiber reinforced polyimide fiber paper preparation method - Google Patents
Meta-aramid precipitation fiber reinforced polyimide fiber paper preparation method Download PDFInfo
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- CN102953290A CN102953290A CN201210434470XA CN201210434470A CN102953290A CN 102953290 A CN102953290 A CN 102953290A CN 201210434470X A CN201210434470X A CN 201210434470XA CN 201210434470 A CN201210434470 A CN 201210434470A CN 102953290 A CN102953290 A CN 102953290A
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Abstract
The present invention provides a meta-aramid precipitation fiber reinforced polyimide fiber paper preparation method, which comprises: carrying out ease dispersion on polyimide short-cut fibers in a groove type pulp beater; carrying out ease dispersion on meta-aramid precipitation fibers in the groove type pulp beater, and then adding to the treated polyimide short-cut fibers to obtain the polyimide fiber pulp; adding polyethylene oxide, styrene-butadiene latex and cation polyacrylamide to the polyimide fiber pulp; adopting a paper machine to carry out papermaking molding and drying to obtain base paper; and adopting a polyimide resin to immerse the base paper, and carrying out hot pressing through a hot pressing machine to obtain the polyimide fiber paper. According to the meta-aramid precipitation fiber reinforced polyimide fiber paper preparation method, the meta-aramid precipitation fibers are added to the polyimide fiber papermaking process so as to improve strength and papermaking of the polyimide fiber paper, reduce paper breaking during papermaking, improve speed the paper machine, and improve production efficiency.
Description
Technical field
The invention belongs to paper industry and material industry crossing domain, be specifically related to the preparation method that a kind of meta-aramid fibre fibrid strengthens polyimide fiber paper.
Background technology
Polyimide fiber has high heat endurance, high elastic modelling quantity and low water absorbable can be widely used in atomic energy industry, space environment, the researchs such as needs, Aero-Space, national defense construction, novel building, rapid, ocean development, sports apparatus, new forms of energy, Environmental Industry and safety device of recovering.
Polyimide fiber is because self structure has high temperature resistant, thermally-stabilised, the good characteristics such as electrical insulating property.Bibliographical information is arranged, the polyimide fiber of different route of synthesis and spinning is carried out thermogravimetric analysis show that its decomposition temperature that begins all can reach more than 300 ℃, the decomposition temperature that has even can reach 600 ℃.Therefore, in the place higher to temperature requirements, the polyimide fiber paper sill demonstrates larger advantage.
The polyimides staple fiber is because the characteristic of fiber self, surperficial smoother, and making beating can not produce the phenomenon of wire-dividing broom purification, thereby interfibrous adhesion is more weak; And meta-aramid full name " Fanglun 1313 ", english abbreviation is PMIA, China is called aramid fiber 1313.Meta-aramid fibre fibrid is in the premium properties of inheriting meta-aramid 1313 staple fibers, also have than the better papermaking properties of staple fiber, little such as fibrid density, the surface is the lint shape, fento is grown thickly, filoplume is abundant, have and the similar wire-dividing broom purification phenomenon of string, fiber axis caudad fibril changes into tip-like, fiber surface area is huge, and this phenomenon that is similar to the string wire-dividing broom purification on fibrid surface makes itself and allied fiber, easier formation hydrogen bond between the compound resin of aqueous medium and amide-type, so that the power that interweaves of aramid fiber fibrid is strong, thereby dispersed fine in aqueous medium, other fibers cooperate the evenness of pulping when manufacturing paper with pulp better, and the evenness of page is also relatively good when becoming paper, but because fibre length is less, intensity is also less.
Summary of the invention
The object of the present invention is to provide a kind of meta-aramid fibre fibrid to strengthen the preparation method of polyimide fiber paper.
For achieving the above object, the present invention has adopted following technical scheme:
1) the polyimides staple fiber is discongested dispersion 10 ~ 120 minutes in trough-style pulp beater;
2) meta-aramid fibre fibrid is discongested dispersion in trough-style pulp beater, discongesting and being dispersed to beating degree is that 20 ~ 60 ° of SR get the meta-aramid fibre fibrid slurry, meta-aramid fibre fibrid slurry added through step 1) discongest in the polyimides staple fiber after the dispersion to get the polyimide fiber slurry, the addition of meta-aramid fibre fibrid slurry is counted 0.1 ~ 15% of polyimides staple fiber over dry quality with meta-aramid fibre fibrid over dry quality, the polyethylene glycol oxide (PEO) that adds polyimides staple fiber over dry quality 0.01 ~ 7% in the polyimide fiber slurry, 0.1 ~ 18% styrene-butadiene latex and 0.1 ~ 15% cationic polyacrylamide (CPAM), then the paper using machine moulding of manufacturing paper with pulp, the dry body paper that gets, hot pressing gets polyimide fiber paper through hot press after with polyimide resin-impregnated with body paper, the filling of meta-aramid fibre fibrid and be similar to the phenomenon of the wire-dividing broom purification of string has improved the intensity that polyimide fiber paper is opened.
The length of described polyimides staple fiber is 2 ~ 10mm.
The pickup of described polyimide resin is 10 ~ 30% of original paper quality, and the paper pickup is too small, and paper tensile strength and compressive resistance strengthen not obvious; Pickup is too high, and paper percentage elongation and tearability are brought larger negative effect.The polyimide resin that the present invention adopts is resistant to elevated temperatures polyimide resin, is specially the high temperature resistant YI-FX resin that the Changchun rugged polyimides of height limited company produces.
The preparation method that meta-aramid fibre fibrid of the present invention strengthens polyimide fiber paper adds meta-aramid fibre fibrid in polyimide fiber is copied the process of paper, and utilize polyimide resin that body paper is carried out impregnation process, the intensity of polyimide fiber paper, manufacturing paper with pulp property have been improved, reduce the disconnected paper when manufacturing paper with pulp, improved paper machine speed and production efficiency.
Through long-term experimental study, find to copy in the process of paper at polyimide fiber, add a certain amount of meta-aramid fibre fibrid, the evenness in the time of can effectively improving into paper, what increase page is intensity, after drying, indices also is significantly improved.
The prepared polyimide fiber paper of the present invention is the environment-friendly and energy-efficient new product, with high content of technology, strong innovation, have a extensive future, to promoting Hi-tech Industry Development, promote the upgrading of conventional industries, promote the class of insulating materials product, promote the development of related industry to be of great immediate significance.
Description of drawings
Fig. 1 is process chart of the present invention.
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples.The technological process of production of the present invention as shown in Figure 1, concrete technology is as follows:
Embodiment 1
First the polyimides staple fiber is discongested in trough-style pulp beater and disperseed 30 minutes, the polyimides staple fiber is discongested fully disperse and suitable cut-out; Meta-aramid fibre fibrid is discongested dispersion in trough-style pulp beater, discongesting and being dispersed to beating degree is that 60 ° of SR get the meta-aramid fibre fibrid slurry, according to 10%(in meta-aramid fibre fibrid over dry quality, ratio with respect to polyimides staple fiber over dry quality) proportioning joins meta-aramid fibre fibrid slurry in the polyimides staple fiber of discongesting after the dispersion, is prepared into the polyimide fiber slurry; Send the phenomenons such as the poly-entanglement of wadding that fiber occurs in the process for anti-fluid stopping, the PEO(of adding 3% is with respect to the ratio of polyimides staple fiber over dry quality in the polyimide fiber slurry) as dispersant, improve the viscosity of pulp suspension, it is poly-to reduce wadding, in order to make paper obtain initial intensity, in the polyimide fiber slurry, add 0.1%(with respect to the ratio of polyimides staple fiber over dry quality) styrene-butadiene latex and 15%(with respect to the ratio of polyimides staple fiber over dry quality) CPAM; At last, tiltedly net or cylinder mould machine manufacture paper with pulp moulding, be 90 ℃ of lower dry polyimide fiber body paper in temperature, with polyimide fiber body paper polyimide resin-impregnated, the pickup of polyimide resin is controlled at 10%(with respect to the mass ratio of polyimide fiber body paper), behind the dipping through hot press hot pressing produce qualified paper.
Embodiment 2
First the polyimides staple fiber is discongested in trough-style pulp beater and disperseed 10 minutes, the polyimides staple fiber is discongested fully disperse and suitable cut-out; Meta-aramid fibre fibrid is discongested dispersion in trough-style pulp beater, discongesting and being dispersed to beating degree is that 20 ° of SR get the meta-aramid fibre fibrid slurry, according to 15%(in meta-aramid fibre fibrid over dry quality, ratio with respect to polyimides staple fiber over dry quality) proportioning joins meta-aramid fibre fibrid slurry in the polyimides staple fiber of discongesting after the dispersion, is prepared into the polyimide fiber slurry; Send the phenomenons such as the poly-entanglement of wadding that fiber occurs in the process for anti-fluid stopping, the PEO(of adding 7% is with respect to the ratio of polyimides staple fiber over dry quality in the polyimide fiber slurry) as dispersant, improve the viscosity of pulp suspension, it is poly-to reduce wadding, in order to make paper obtain initial intensity, in the polyimide fiber slurry, add 6%(with respect to the ratio of polyimides staple fiber over dry quality) styrene-butadiene latex and 2.5%(with respect to the ratio of polyimides staple fiber over dry quality) CPAM; At last, tiltedly net or cylinder mould machine manufacture paper with pulp moulding, be 105 ℃ of lower dry polyimide fiber body paper in temperature, with polyimide fiber body paper polyimide resin-impregnated, the pickup of polyimide resin is controlled at 15%(with respect to the mass ratio of polyimide fiber body paper), behind the dipping through hot press hot pressing produce qualified paper.
Embodiment 3
First the polyimides staple fiber is discongested in trough-style pulp beater and disperseed 120 minutes, the polyimides staple fiber is discongested fully disperse and suitable cut-out; Meta-aramid fibre fibrid is discongested dispersion in trough-style pulp beater, discongesting and being dispersed to beating degree is that 40 ° of SR get the meta-aramid fibre fibrid slurry, according to 0.1%(in meta-aramid fibre fibrid over dry quality, ratio with respect to polyimides staple fiber over dry quality) proportioning joins meta-aramid fibre fibrid slurry in the polyimides staple fiber of discongesting after the dispersion, is prepared into the polyimide fiber slurry; Send the phenomenons such as the poly-entanglement of wadding that fiber occurs in the process for anti-fluid stopping, the PEO(of adding 0.01% is with respect to the ratio of polyimides staple fiber over dry quality in the polyimide fiber slurry) as dispersant, improve the viscosity of pulp suspension, it is poly-to reduce wadding, in order to make paper obtain initial intensity, in the polyimide fiber slurry, add 18%(with respect to the ratio of polyimides staple fiber over dry quality) styrene-butadiene latex and 0.1%(with respect to the ratio of polyimides staple fiber over dry quality) CPAM; At last, tiltedly net or cylinder mould machine manufacture paper with pulp moulding, be 115 ℃ of lower dry polyimide fiber body paper in temperature, with polyimide fiber body paper polyimide resin-impregnated, the pickup of polyimide resin is controlled at 30%(with respect to the mass ratio of polyimide fiber body paper), behind the dipping through hot press hot pressing produce qualified paper.
Three kinds of paper performance comparative analyses see the following form
| Paper type | Tensile index/Nmg -1 | Tear index/mNm 2g -1 | Compressive resistance/Kvmm -1 |
| Polyimides paper | 37.45 | 23.56 | 6.57 |
| Meta-position aramid fiber paper | 33.26 | 24.53 | 9.72 |
| Enhancement mode polyimides paper | 43.52 | 30.85 | 11.43 |
In the upper table, enhancement mode polyimides paper prepares according to embodiment 1, polyimides paper and meta-position aramid fiber paper are contrast, as can be seen from the above table, compare through two kinds of paper of polyimide fiber paper and other that meta-aramid fibre fibrid strengthens, strength character and electric property have obvious advantage.
Claims (3)
1. the preparation method of a meta-aramid fibre fibrid enhancing polyimide fiber paper is characterized in that, may further comprise the steps:
1) the polyimides staple fiber is discongested dispersion 10 ~ 120 minutes in trough-style pulp beater;
2) meta-aramid fibre fibrid is discongested dispersion in trough-style pulp beater, discongesting and being dispersed to beating degree is that 20 ~ 60 ° of SR get the meta-aramid fibre fibrid slurry, meta-aramid fibre fibrid slurry added through step 1) discongest in the polyimides staple fiber after the dispersion to get the polyimide fiber slurry, the addition of meta-aramid fibre fibrid slurry is counted 0.1 ~ 15% of polyimides staple fiber over dry quality with meta-aramid fibre fibrid over dry quality, the polyethylene glycol oxide that adds polyimides staple fiber over dry quality 0.01 ~ 7% in the polyimide fiber slurry, 0.1 ~ 18% styrene-butadiene latex and 0.1 ~ 15% cationic polyacrylamide, then the paper using machine moulding of manufacturing paper with pulp, dry body paper, hot pressing gets polyimide fiber paper through hot press after with polyimide resin-impregnated with body paper.
2. described a kind of meta-aramid fibre fibrid strengthens the preparation method of polyimide fiber paper according to claim 1, and it is characterized in that: the length of described polyimides staple fiber is 2 ~ 10mm.
3. described a kind of meta-aramid fibre fibrid strengthens the preparation method of polyimide fiber paper according to claim 1, and it is characterized in that: the pickup of described polyimide resin is 10 ~ 30% of original paper quality.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105369672A (en) * | 2015-10-20 | 2016-03-02 | 陕西科技大学 | Polyimide fiber mica paper and preparation method thereof |
| CN105386363A (en) * | 2015-10-29 | 2016-03-09 | 陕西科技大学 | Preparation method for alkali-resistant polyimide fiber paper |
| CN112726264A (en) * | 2020-12-25 | 2021-04-30 | 烟台民士达特种纸业股份有限公司 | Polyimide paper base material for wave-transparent honeycomb and preparation method thereof |
| CN112726283A (en) * | 2020-12-25 | 2021-04-30 | 烟台民士达特种纸业股份有限公司 | Poly (p-phenylene benzobisoxazole) fiber paper base material for high-temperature-resistant honeycomb core material and preparation method thereof |
| CN115787345A (en) * | 2022-11-28 | 2023-03-14 | 陕西科技大学 | Montmorillonite-doped polyimide fiber paper and preparation method thereof |
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| CN102174770A (en) * | 2011-01-27 | 2011-09-07 | 深圳昊天龙邦复合材料有限公司 | Prepreg containing aromatic synthetic fiber paper and printed circuit board manufactured from same |
| CN102517976A (en) * | 2011-12-08 | 2012-06-27 | 烟台民士达特种纸业股份有限公司 | Preparation method of pure p-aramid paper |
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Patent Citations (4)
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| CN101748646A (en) * | 2009-12-31 | 2010-06-23 | 烟台美士达特种纸业股份有限公司 | Stuff used for preparing meta-aramid paper, the production method thereof and meta-aramid paper made from the stuff and the production method thereof |
| CN102174770A (en) * | 2011-01-27 | 2011-09-07 | 深圳昊天龙邦复合材料有限公司 | Prepreg containing aromatic synthetic fiber paper and printed circuit board manufactured from same |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105369672A (en) * | 2015-10-20 | 2016-03-02 | 陕西科技大学 | Polyimide fiber mica paper and preparation method thereof |
| CN105369672B (en) * | 2015-10-20 | 2017-06-09 | 陕西科技大学 | A kind of polyimide fiber mica paper and preparation method thereof |
| CN105386363A (en) * | 2015-10-29 | 2016-03-09 | 陕西科技大学 | Preparation method for alkali-resistant polyimide fiber paper |
| CN112726264A (en) * | 2020-12-25 | 2021-04-30 | 烟台民士达特种纸业股份有限公司 | Polyimide paper base material for wave-transparent honeycomb and preparation method thereof |
| CN112726283A (en) * | 2020-12-25 | 2021-04-30 | 烟台民士达特种纸业股份有限公司 | Poly (p-phenylene benzobisoxazole) fiber paper base material for high-temperature-resistant honeycomb core material and preparation method thereof |
| CN115787345A (en) * | 2022-11-28 | 2023-03-14 | 陕西科技大学 | Montmorillonite-doped polyimide fiber paper and preparation method thereof |
| CN115787345B (en) * | 2022-11-28 | 2024-03-19 | 陕西科技大学 | Montmorillonite doped polyimide fiber paper and preparation method thereof |
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