CN1603515A - Method for manufacturing high strength fiber network sandwich paper - Google Patents
Method for manufacturing high strength fiber network sandwich paper Download PDFInfo
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- CN1603515A CN1603515A CN 200410067952 CN200410067952A CN1603515A CN 1603515 A CN1603515 A CN 1603515A CN 200410067952 CN200410067952 CN 200410067952 CN 200410067952 A CN200410067952 A CN 200410067952A CN 1603515 A CN1603515 A CN 1603515A
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Abstract
The invention discloses a kind to use the non- vegetable fiber or the chemical fiber makes the high strength textile fiber network to clamp the core paper bag paper the method, its process as follows: Shut off the non- vegetable fiber or the chemical fiber, blooms the pine; High cuts after the aqueous method size reduction, eliminates the dregs; Joins the chemical additive, carries on the grinding paste; Then high frequency clears out, centrifugal screen has removed ties the group and -odd dregs, the concentration, the system results in the paper pulp, in the dispersing agent and under the softener function with the clear water mix, matches the core thick liquid, slanting on-line makes the paper bag paper in three pack of nets papers machine the core level; About at the same time, makes the stratification plane paper with the vegetable fiber paper pulp through three pack of nets papers machine fourdrinier wire on, Yu Xinceng compound, dry, then obtains the high strength textile fiber network to clamp the core paper bag paper, this technology may use two times of textile fibers for the raw material configuration core paper pulp, replaces the natural plant paper bag, reduces the production process the environmental pollution, and greatly reduces the production cost, the solution price inexpensive high strength network nature bag paper manufacture question, causes the plastic to weave the bag the renewal product, has the objective market prospect.
Description
Technical field
The present invention relates to a kind of wet method and make the method for sack kraft paper, specifically, relate to a kind of manufacture method of the sandwich sack kraft paper at the sandwich layer that accompanies the fine mesh network structure that forms on the spot with non-plant fibre or useless chemical fibre refill slurry up and down between ply of paper.
Background technology
In recent years, the external ribbed paper that occurs is composited by dry method entirely, and its subject matter is solid having a surplus, and is ventilative not enough, is difficult to be fit to the modernization packing of many powders.Return air during can, Packing Unit is not in place.Domestic original high strength ribbed paper is to utilize the screen cloth base material that is made in advance once synthetic with paper pulp on the speciality paper machine, and the finished product of producing has improved air permeability and tearability greatly, thereby has improved the burst index of sack kraft paper.But be subjected to the restriction of screen cloth high price, cost is difficult to reduce always, and the market acceptance level is limited.
How making paper pulp compound paper bag paper both keep high strength, reduce manufacturing cost again, enlarge the market ability to accept, is the problem that this field is extremely paid close attention to.
Summary of the invention
The technical issues that need to address of the present invention are the manufacture methods that disclose a kind of high strength fiber network sandwich paper, to overcome the limited defective of the higher market of price acceptance level that prior art exists.
Method of the present invention comprises the steps:
(1) preparation of non-plant fibre or chemical fibre paper pulp:
Non-plant fibre or chemical fibre are chopped into 15～35mm, remove thick slag, loosen into filament with opener, with waterpower disintegrator wet method size degradation, the purpose of waterpower disintegrator wet method size degradation is: 1. make fiber length moderate, keep suitable draw ratio, 2. make fiber more straight, crimpness is little, 3. makes fiber that certain moisture is arranged, 4. the fiber of size degradation, over-length fibre and overcut fibre are few as far as possible.During the wet method size degradation, the weight concentration of fiber is 1～10%, most preferable concentrations is 4～6%, fibre length behind the size degradation is 3～20mm, add additive, defibrination 1.5～2min in jordan, import in the deflaker again and discongest, the weight concentration of fiber was 1～10% when high frequency was discongested, 30～60 ℃ of water temperatures, the speed of mainshaft is 2800～3200 rev/mins, the time of discongesting is 1～3min, most preferably condition is a fibre concentration 3～5%, 40～50 ℃ of water temperatures, the speed of mainshaft is 2900 rev/mins, the time of discongesting is 1～3min, removes crude fibre by centrifuge then, and good slurry is condensed into non-plant fibre or the chemical fibre paper pulp that solid content is 5～8wt% through Water Extraction Machinery;
Said defibrination, edge of a knife gap can not be too small, causes edge of a knife contact zone to produce high heat to avoid violent mechanism, causes the synthetic organic fibre slurry to stick together each other because of heat fusing, forms coarse fiber bundle.
Non-plant fibre of the present invention or chemical fibre pulping process and the difference of conventional plant fiber pulping process are: non-plant fibre or chemical fibre cut into the length of 15～35mm, have the architectural feature of fubril pencil through the fiber after the shredding in water, these bunchy fubrils have become or near wire-dividing broom purification.So, handle without beater subsequently, but directly adopt the high shear disintegrator to carry out the wet method size degradation, directly carry out defibrination again after the slagging-off with jordan.
(2) preparation of core slurry:
Above-mentioned non-plant fibre or chemical fibre paper pulp need be mixed with the core slurry that satisfies special-purpose online concentration before copying paper, its preparation method comprises the steps:
Above-mentioned non-plant fibre or the adding of chemical fibre paper pulp are contained in the water of additive, mix with plain boiled water then, make the core slurry that reaches online concentration;
Additive amount is 1～8% of an oven dry stock weight; Most preferred quantities is 2～5%;
The addition of non-plant fibre or chemical fibre paper pulp is 1: 1 with the part by weight that contains the water of additive;
The weight concentration of core slurry, can be according to the length of fiber size degradation processing, add what plain boiled water was regulated: for the fiber of long 3～6mm, the concentration of core slurry is 0.1～1%, the fiber of length 6～15mm, the concentration of core slurry is 0.05～0.1%, the fiber of length 15～25mm, and the concentration of core slurry is 0.01～0.05%; Be that fiber is long more, online concentration is low more, copies as mixing with string, and concentration then can correspondingly improve.Because the core pulp fibres is longer, be difficult for screening and purify, white-water system must carry out in sealing, in case sneak into foreign material.And for preventing that fiber from floating poly-and wadding gathers, flow process will be tried one's best simple, short and small.The core slurry that mixes with plain boiled water can only store the short time, and online is copied and joined as early as possible;
Term " plain boiled water " all has description on the general technical data in this area.
(3) manufacturing paper with pulp of sandwich sack kraft paper:
With string or xylon paper pulp send into triple-lap net paper captain manufacture paper with pulp on the net the levels facial tissue, simultaneously the core slurry is sent into the sandwich layer of tiltedly manufacturing paper with pulp on the net through head box, chimericly go between the levels facial tissue; Be to dewater under the condition of 50～80Pa to manufacture paper with pulp in vacuum, drying promptly obtains fiber network sandwich paper;
Under vacuum condition, manufacture paper with pulp, can deviate from a large amount of water in the short period of time, particularly the lower situation of core slurry concentration;
Said opener, waterpower disintegrator, jordan or deflaker, centrifuge, Water Extraction Machinery, three paper machine of the laminated network etc. are the common apparatus of field of papermaking.
Said non-plant fibre comprises a kind of or its mixture in the inorfils such as coal ash fiber, basalt fibre, glass fibre;
Said chemical fibre comprises synthetic organic fibres such as polyester fiber, polyacrylonitrile fibre or polyurethane fiber, and a kind of or its mixture in their secondary stock, the discarded or fiber that reclaims etc.; Most preferred is polyester fiber;
Said fibre diameter is 1～5 μ m; Most preferred diameter is 3 μ m;
Said additive is meant dispersant and softening agent;
Dispersant is selected from a kind of or its mixture in polyethylene glycol oxide, polyacrylamide, Sodium Polyacrylate, polyvinyl alcohol, modified starch or the carboxymethyl cellulose;
Softening agent is selected from a kind of or its mixture in aqueous acetic acid, aqueous hydrochloric acid solution, the amido compounds aqueous solution such as monoethanolamine, diethanol amine, dimethylaminoethanol, DEAE diethylaminoethanol etc., alkyl acid zinc, alkyl acid sodium, alkyl acid magnesium, alkyl acid calcium, sodium polyphosphate or the algae acyl acid sodium;
The weight concentration of aqueous acetic acid, aqueous hydrochloric acid solution or the amido compounds aqueous solution is 1～5%;
According to the present invention, said non-plant fibre or chemical fibre paper pulp can mix use with xylon paper pulp, and the scope that xylon paper pulp adds is 5～50% of a non-plant fibre paper pulp.Most preferred addition is 10%.
Form used non-plant fibre or the chemical fibre paper pulp consumption of network sandwich sack kraft paper, in the fiber oven-dry weight, every square metre of sack kraft paper 8～12 gram fibers, most preferred quantities 8～9 grams.Under the less situation of chemical fibre consumption, can add and count 0.01～0.1% water-soluble polymer with the weight of fiber oven-dry weight, as polyvinyl alcohol, can increase the paper overall performance, and help reclaiming.
The present invention is used for the therebetween sandwich layer with non-plant fibre or chemical fibre or useless chemical fibre and makes sack kraft paper, improves the application added value of waste fiber, produces inexpensive sandwich paper, and the process of this technology is applicable to industrial-scale production, and energy consumption is low, saves the energy.This sack kraft paper can be used as the renewal product of the Polywoven Bag of " white pollution ", quality and price competitiveness on market is very strong, be that a new generation adapts to the novel sack kraft paper that the domestic and international market requires, good application prospects and economic benefit arranged at aspects such as industrial production, packaging material.
The specific embodiment
Embodiment 1
Get the flyash superfine fibre of length 35～45mm, become filament by the abundant shredding of opener.Get its 6 parts (weight), add 94 parts of entry,, the fiber size degradation is become 3mm by high shear pulping filament cutter.Fiber after the chopping is after the high concentration scummer is removed slag charge, pump in the mixing pit, in material, add 0.05 part of polyacrylamide, 5 parts of the 1% dimethyl formamide aqueous solution, 0.01 part on alkyl acid zinc, 0.03 part of polyethylene glycol oxide, send into defibrination 2min in the wide angle refiner after the mediation, import in the deflaker again and discongest, fiber is evenly disperseed, increase specific area, control temperature 40～50C, the speed of mainshaft is that 3000 rev/mins, the time of discongesting are 1.5min.By screen centrifuge, remove the fiber slag charge of thick conglomeration then; Its good slurry concentrates by Water Extraction Machinery, obtains the paper pulp of concentration about 8%, and it is standby to put into dosing chamber.
The preparation of last web-roll core slurry: in the mixing pit that has screw pump and propeller mixer, under continuous stirring, ceaselessly add 100 parts of water, 0.05 part of Sodium Polyacrylate, 0.05 part of polyvinyl alcohol, 0.06 part in algae acyl acid sodium, dissolve and stir after, add 100 parts of the fly ash fiber pulps of above-mentioned preparation gradually; Through fully mixing, obtaining concentration is 4% homodisperse slurries of fiber, sends in the blender again and mixes with 3800 parts of plain boiled waters, and the core that is made into 0.1% concentration is starched, and fibre density is controlled at 0.1～0.5g/cm
3Between, then change the forebay of destroying that has agitating device over to, prepare at one time to manufacture paper with pulp synthetic with stratum reticulare string paper pulp up and down.
Sandwich paper manufactures paper with pulp: the string paper pulp that will prepare is in advance delivered to the levels facial tissue of manufacturing paper with pulp on the triple-lap net paper captain wet end through head box stream; Simultaneously, with the coal ash fiber core slurry process head box of above-mentioned preparation, 3 seconds holdup times of control, stream is delivered on the three paper machine of the laminated network oblique-net parts, regulates dewatering box vacuum 50Pa, closes the weir after the dehydration and enters between the plant fiber paper levels.Subsequently, the subsequent step of net paper machine making sack kraft paper obtains fiber network sandwich paper routinely.
With reference to GB GB/T 7968-1996 (sack kraft paper) prepared sandwich sack kraft paper is measured, its performance indications are between 1 grade:
Quantitative 160～180g/m
2
Longitudinal tear degree 23mN m
2/ g
Air permeability 3.3 μ m/PaS
Tensile strength (laterally) 3.2kN/m
Percentage elongation (vertically) 5%
Anti-energy absorption (vertically) 295J/m that opens
2
(laterally) 260J/m
2
Folding strength (vertically) 920 times
(laterally) 880 times
Bursting strength 920kPa
Delivery moisture 9.0 ± 2%
Embodiment 2
The spandex fibre raw material that reclaims is cut into 20mm length through cutting machine, become filament by the abundant shredding of opener.Get 4 parts of fibers (weight), add 96 parts of entry,, the fiber size degradation is become 10～15mm by high shear pulping filament cutter.Fiber after the chopping is after the high concentration scummer is removed slag charge, pump in the mixing pit, in material, add 0.02 part of polyacrylamide, 3 parts of 1% aqueous hydrochloric acid solutions, 0.01 part in alkyl acid sodium, 0.02 part of polyethylene glycol oxide, send into defibrination 2min in the wide angle refiner after the mediation, import in the deflaker again and discongest, fiber is evenly disperseed, increase specific area, control temperature 40C, the speed of mainshaft is that 3000 rev/mins, the time of discongesting are 1.5min.By screen centrifuge, remove the fiber slag charge of thick conglomeration then; Its good slurry concentrates by Water Extraction Machinery, obtains the paper pulp of concentration about 6%, and it is standby to put into dosing chamber.
The preparation of last web-roll core slurry: in the mixing pit that has screw pump and propeller mixer, under continuous stirring, ceaselessly add 100 parts of water, 0.05 part of carboxymethyl cellulose, 0.05 part of modified starch, 0.05 part of sodium polyphosphate, dissolving and stir after, add 100 parts of the spandex fibre paper pulp of above-mentioned preparation gradually; Through fully mixing, obtaining concentration is 3% homodisperse slurries of fiber, sends in the blender again and mixes with 5800 parts of plain boiled waters, and the core that is made into 0.05% concentration is starched, and fibre density is controlled at 0.1g/cm
3, then change the forebay of destroying that has agitating device over to, prepare at one time to manufacture paper with pulp synthetic with stratum reticulare string paper pulp up and down.
Sandwich paper manufactures paper with pulp: the string paper pulp that will prepare is in advance delivered to the levels facial tissue of manufacturing paper with pulp on the triple-lap net paper captain wet end through head box stream; Simultaneously, with the spandex fibre core slurry process head box of above-mentioned preparation, 4 seconds holdup times of control, stream is delivered on the three paper machine of the laminated network oblique-net parts, regulates dewatering box vacuum 60 Pa, closes the weir after the dehydration and enters between the plant fiber paper levels.Subsequently, the subsequent step of net paper machine making sack kraft paper obtains fiber network sandwich paper routinely.
With reference to GB GB/T 7968-1996 (sack kraft paper) prepared sandwich sack kraft paper is measured, its performance indications are between excellent～1 grade:
Quantitative 160～180g/m
2
Longitudinal tear degree 24mN m
2/ g
Air permeability 3.3 μ m/PaS
Tensile strength (laterally) 3.3kN/m
Percentage elongation (vertically) 6.5%
Anti-energy absorption (vertically) 310J/m that opens
2
(laterally) 260J/m
2
Folding strength (vertically) 1030 times
(laterally) 910 times
Bursting strength 945kPa
Delivery moisture 9.0 ± 2%
Embodiment 3
The acrylic fiber raw material that reclaims is cut into 30～35mm length through cutting machine, become filament by the abundant shredding of opener.Get 3 parts of fibers (weight), add 97 parts of entry,, the fiber size degradation is become 15～25mm by high shear pulping filament cutter.Fiber after the chopping is after the high concentration scummer is removed slag charge, pump in the mixing pit, in material, add 0.02 part of polyacrylamide, 5 parts of 1% aqueous acetic acids, 0.01 part of alkyl acid calcium, 0.02 part of polyvinyl alcohol, send into defibrination 2min in the wide angle refiner after the mediation, import in the deflaker again and discongest, fiber is evenly disperseed, increase specific area, control temperature 50C, the speed of mainshaft is that 3000 rev/mins, the time of discongesting are 1.5min.By screen centrifuge, remove the fiber slag charge of thick conglomeration then; Its good slurry concentrates by Water Extraction Machinery, obtains the paper pulp of concentration about 6%, and it is standby to put into dosing chamber.
The preparation of last web-roll core slurry: in the mixing pit that has screw pump and propeller mixer, under continuous stirring, ceaselessly add 100 parts of water, 0.05 part of Sodium Polyacrylate, 0.05 part of polyvinyl alcohol, 0.05 part of sodium polyphosphate, dissolving and stir after, add 100 parts of the acrylic fiber paper pulp of above-mentioned preparation gradually; Through fully mixing, obtaining concentration is 3% homodisperse slurries of fiber, sends in the blender again and mixes with 29800 parts of plain boiled waters, and the core that is made into 0.01% concentration is starched, and fibre density is controlled at 0.05g/cm
3Between, then change the forebay of destroying that has agitating device over to, prepare at one time to manufacture paper with pulp synthetic with stratum reticulare string paper pulp up and down.
Sandwich paper manufactures paper with pulp: the string paper pulp that will prepare is in advance delivered to the levels facial tissue of manufacturing paper with pulp on the triple-lap net paper captain wet end through head box stream; Simultaneously, with the acrylic fiber core slurry process head box of above-mentioned preparation, 3～4 seconds holdup times of control, stream is delivered on the three paper machine of the laminated network oblique-net parts, regulates dewatering box vacuum 70Pa, closes the weir after the dehydration and enters between the plant fiber paper levels.Subsequently, the subsequent step of net paper machine making sack kraft paper obtains fiber network sandwich paper routinely.
With reference to GB GB/T 7968-1996 (sack kraft paper) prepared sandwich sack kraft paper is measured, its performance indications are between excellent～1 grade:
Quantitative 160～180g/m
2
Longitudinal tear degree 24.5mN m
2/ g
Air permeability 3.4 μ m/PaS
Tensile strength (laterally) 3.35kN/m
Percentage elongation (vertically) 6.8%
Anti-energy absorption (vertically) 308J/m that opens
2
(laterally) 262J/m
2
Folding strength (vertically) 1010 times
(laterally) 920 times
Bursting strength 950kPa
Delivery moisture 9.0 ± 2%
Embodiment 4
The polyester fiber raw material that reclaims is cut into 15～20mm length through cutting machine, become filament, get 5 parts of fibers (weight), add 95 parts of entry,, the fiber size degradation is become 3～6mm by high shear pulping filament cutter by the abundant shredding of opener.Fiber after the chopping is after the high concentration scummer is removed slag charge, pump in the mixing pit, in material, add 0.02 part of polyacrylamide, 3 parts of 1% aqueous acetic acids, 0.01 part on alkyl acid zinc, 0.02 part of polyethylene glycol oxide, send into defibrination 2min in the wide angle refiner after the mediation, import in the deflaker again and discongest, fiber is evenly disperseed, increase specific area, control temperature 45C, the speed of mainshaft is that 3000 rev/mins, the time of discongesting are 1.5min.By screen centrifuge, remove the fiber slag charge of thick conglomeration then; Its good slurry concentrates by Water Extraction Machinery, obtains the paper pulp of concentration about 8%, and it is standby to put into dosing chamber.
The preparation of last web-roll core slurry: in the mixing pit that has screw pump and propeller mixer, under continuous stirring, ceaselessly add 100 parts of water, 0.05 part of Sodium Polyacrylate, 0.05 part of polyvinyl alcohol, 0.06 part in algae acyl acid sodium, dissolve and stir after, add 100 parts of the polyester fiber paper pulp of above-mentioned preparation gradually; Through fully mixing, obtaining concentration is 4% homodisperse slurries of fiber, sends in the blender again and mixes with 3800 parts of plain boiled waters, and the core that is made into 0.1% concentration is starched, and fibre density is controlled at 0.1～0.5g/cm
3Between, then change the forebay of destroying that has agitating device over to, prepare at one time to manufacture paper with pulp synthetic with stratum reticulare string paper pulp up and down.
Sandwich paper manufactures paper with pulp: the string paper pulp that will prepare is in advance delivered to the levels facial tissue of manufacturing paper with pulp on the triple-lap net paper captain wet end through head box stream; Simultaneously, with the polyester fiber core slurry process head box of above-mentioned preparation, 3 seconds holdup times of control, stream is delivered on the three paper machine of the laminated network oblique-net parts, regulates dewatering box vacuum 60Pa, closes the weir after the dehydration and enters between the plant fiber paper levels.Subsequently, the subsequent step of net paper machine making sack kraft paper obtains fiber network sandwich paper routinely.
With reference to GB GB/T 7968-1996 (sack kraft paper) prepared sandwich sack kraft paper is measured, its performance indications are between excellent～1 grade:
Quantitative 160～180g/m
2
Longitudinal tear degree 24mN m
2/ g
Air permeability 3.4 μ m/PaS
Tensile strength (laterally) 3.2kN/m
Percentage elongation (vertically) 6%
Anti-energy absorption (vertically) 300J/m that opens
2
(laterally) 260J/m
2
Folding strength (vertically) 1000 times
(laterally) 900 times
Bursting strength 940kPa
Delivery moisture 9.0 ± 2%
Embodiment 5
The mixing chemical fibre raw material that reclaims is cut into 20～25mm length through cutting machine, become filament by the abundant shredding of opener.Get its 4 parts (weight), add 96 parts of entry,, the fiber size degradation is become 6mm by high shear pulping filament cutter.Fiber after the chopping is after the high concentration scummer is removed slag charge, pump in the mixing pit, in material, add 0.03 part of polyacrylamide, 3 parts of 1% aqueous sulfuric acids, 0.01 part on alkyl acid zinc, 0.03 part of polyethylene glycol oxide, send into defibrination 2min in the wide angle refiner after the mediation, import in the deflaker again and discongest, fiber is evenly disperseed, increase specific area, control temperature 40～50C, the speed of mainshaft is that 3000 rev/mins, the time of discongesting are 1.5min.By screen centrifuge, remove the fiber slag charge of thick conglomeration then; Its good slurry concentrates by Water Extraction Machinery, obtains the paper pulp of concentration about 6%, and it is standby to put into dosing chamber.
The preparation of last web-roll core slurry: in the mixing pit that has screw pump and propeller mixer, under continuous stirring, ceaselessly add 100 parts of water, 0.05 part of Sodium Polyacrylate, 0.05 part of polyvinyl alcohol, 0.06 part in algae acyl acid sodium, dissolve and stir after, add 100 parts of the hybridization fiber paper pulps of above-mentioned preparation gradually; Through fully mixing, obtaining concentration is 3% homodisperse slurries of fiber, sends in the blender again and mixes with 2800 parts of plain boiled waters, and the core that is made into 0.1% concentration is starched, and fibre density is controlled at 0.5g/cm
3Between, then change the forebay of destroying that has agitating device over to, prepare at one time to manufacture paper with pulp synthetic with stratum reticulare string paper pulp up and down.
Sandwich paper manufactures paper with pulp: the string paper pulp that will prepare is in advance delivered to the levels facial tissue of manufacturing paper with pulp on the triple-lap net paper captain wet end through head box stream; Simultaneously, with the hybridization fibre core slurry process head box of above-mentioned preparation, 3 seconds holdup times of control, stream is delivered on the three paper machine of the laminated network oblique-net parts, regulates dewatering box vacuum 80Pa, closes the weir after the dehydration and enters between the plant fiber paper levels.Subsequently, the subsequent step of net paper machine making sack kraft paper obtains fiber network sandwich paper routinely.
With reference to GB GB/T 7968-1996 (sack kraft paper) prepared sandwich sack kraft paper is measured, its performance indications are between 1 grade:
Quantitative 160～180g/m
2
Longitudinal tear degree 23.5mN m
2/ g
Air permeability 3.3 μ m/PaS
Tensile strength (laterally) 3.3kN/m
Percentage elongation (vertically) 5.5%
Anti-energy absorption (vertically) 298J/m that opens
2
(laterally) 263J/m
2
Folding strength (vertically) 980 times
(laterally) 900 times
Bursting strength 930kPa
Delivery moisture 9.0 ± 2%
Claims (10)
1. the manufacture method of a fiber network sandwich paper is characterized in that, comprises the steps:
(1) preparation of non-plant fibre or chemical fibre paper pulp:
Non-plant fibre or chemical fibre are chopped into 15～35mm, loosen into filament with opener, with waterpower disintegrator wet method size degradation, slagging-off, add additive, defibrination in jordan is imported in the deflaker and is discongested, remove crude fibre by centrifuge, be condensed into non-plant fibre or the chemical fibre paper pulp that solid content is 5～8wt% through Water Extraction Machinery again;
In the weight of fiber, the weight concentration of additive is 1～5%;
(2) preparation of core slurry:
Above-mentioned non-plant fibre or the adding of chemical fibre paper pulp are contained in the water of additive, mix with plain boiled water then, make the core slurry that reaches online concentration;
Additive amount is 1～8% of an oven dry stock weight;
The addition of non-plant fibre or chemical fibre paper pulp is 1: 1 with the part by weight that contains the water of additive;
The weight concentration of core slurry counts 0.01～1% with oven dry stock;
(3) manufacturing paper with pulp of sandwich sack kraft paper:
With string or xylon paper pulp send into triple-lap net paper captain manufacture paper with pulp on the net the levels facial tissue, simultaneously the core slurry is sent into the sandwich layer of tiltedly manufacturing paper with pulp on the net through head box, chimericly go between the levels facial tissue; Be to dewater under the condition of 50～80Pa to manufacture paper with pulp in vacuum, drying promptly obtains fiber network sandwich paper;
Said non-plant fibre comprises a kind of or its mixture in the inorfils such as coal ash fiber, basalt fibre, glass fibre;
Said chemical fibre comprises synthetic organic fibres such as polyester fiber, polyacrylonitrile fibre or polyurethane fiber, and a kind of or its mixture in their secondary stock, the discarded or fiber that reclaims etc.; Most preferred is polyester fiber;
Said additive is meant dispersant and softening agent;
Dispersant is selected from a kind of or its mixture in polyethylene glycol oxide, polyacrylamide, Sodium Polyacrylate, polyvinyl alcohol, modified starch or the carboxymethyl cellulose;
Softening agent is selected from a kind of or its mixture in aqueous acetic acid, aqueous hydrochloric acid solution, the amido compounds aqueous solution such as monoethanolamine, diethanol amine, dimethylaminoethanol, DEAE diethylaminoethanol etc., alkyl acid zinc, alkyl acid sodium, alkyl acid magnesium, alkyl acid calcium, sodium polyphosphate or the algae acyl acid sodium;
The weight concentration of aqueous acetic acid, aqueous hydrochloric acid solution or the amido compounds aqueous solution is 1～5%.
2. method according to claim 1 is characterized in that, during with waterpower disintegrator wet method size degradation, the weight concentration of fiber is 1～10%.
3. method according to claim 2 is characterized in that, the weight concentration of fiber is 4～6%.
4. method according to claim 1 is characterized in that, when high frequency is discongested the weight concentration of fiber be 1～10%, 30～60 ℃ of water temperatures, the speed of mainshaft is that 2800～3200 rev/mins, the time of discongesting are 1～3min.
5. method according to claim 4 is characterized in that, most preferably condition is that fibre concentration 3～5%, 40～50 ℃ of water temperatures, the speed of mainshaft are that 2900 rev/mins, the time of discongesting are 1～3min.
6. method according to claim 1, it is characterized in that, the weight concentration of core slurry is counted with oven dry stock: for the fiber of long 3～6mm, the concentration of core slurry is 0.1～1%, the fiber of length 6～15mm, the concentration of core slurry is 0.05～0.1%, the fiber of length 15～25mm, and the concentration of core slurry is 0.01～0.05%.
7. method according to claim 1 is characterized in that, said non-plant fibre or chemical fibre paper pulp can mix use with xylon paper pulp, and the weight that xylon paper pulp adds is 5～50% of non-plant fibre or chemical fibre paper pulp.
8. method according to claim 1 is characterized in that, the addition of xylon paper pulp is 10%.
9 according to each described method of claim 1～8, it is characterized in that, forms used non-plant fibre or the chemical fibre paper pulp consumption of network sandwich sack kraft paper, in the fiber oven-dry weight, and every square metre of sack kraft paper 8～12 gram fibers.
10. method according to claim 9 is characterized in that, adds and counts 0.01～0.1% water-soluble polymer with fiber oven-dry weight weight.
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| CN 200410067952 CN1287050C (en) | 2004-11-09 | 2004-11-09 | Method for manufacturing high strength fiber network sandwich paper |
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|---|---|---|---|
| CN 200410067952 CN1287050C (en) | 2004-11-09 | 2004-11-09 | Method for manufacturing high strength fiber network sandwich paper |
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| CN1287050C CN1287050C (en) | 2006-11-29 |
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| CN102071592A (en) * | 2010-11-29 | 2011-05-25 | 沈阳临德陶瓷研发有限公司 | Method for producing high strength thermal-insulating paper |
| CN102154953A (en) * | 2011-05-10 | 2011-08-17 | 张赫廷 | Automobile fuel filter paper suitable for national IV standard and preparation method thereof |
| CN102154952A (en) * | 2011-05-10 | 2011-08-17 | 张赫廷 | Automobile air filter paper suitable for wet environment and preparation method thereof |
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| CN101400854B (en) * | 2006-03-16 | 2012-06-27 | 住友精化株式会社 | Papermaking method and papermaking machine |
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