CN102817272B - Method for continuous production of high-volume asbestos-free latex isolating sheet - Google Patents
Method for continuous production of high-volume asbestos-free latex isolating sheet Download PDFInfo
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- CN102817272B CN102817272B CN201210305424.XA CN201210305424A CN102817272B CN 102817272 B CN102817272 B CN 102817272B CN 201210305424 A CN201210305424 A CN 201210305424A CN 102817272 B CN102817272 B CN 102817272B
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Abstract
The invention discloses a method for continuous production of a high-volume asbestos-free latex isolating sheet, which comprises a step of adding polyacrylamide and bentonite into pulp to prepare slurry and the following steps in sequence: a) placing the slurry into a slurry flow box for distribution and rectification; b) dressing: placing high-volume slurry on an isolating net to form two layers, wherein an upper layer is a water layer and a lower layer is a slurry layer; c) absorbing the water layer on the isolating net by a vacuum suction method; d) dehydrating the slurry layer by a water scraping plate at the bottom of the isolating net, and then performing dehydration, vacuum squeezing and groove squeezing in a vacuum tank, until the water content of the asbestos-free latex isolating sheet is 40-45 percent by weight; and e) drying. High-volume asbestos-free latex isolating sheets can be produced simultaneously, and the product has high quality.
Description
Technical field
The present invention relates to pulp technology for making paper, be specifically related to a kind of high quantitative method without asbestos emulsoid wet board of continuous prodution.
Background technology
In the industry such as automobile, machinery, petrochemical industry, encapsulant is the material manufacturing the control of engine, refrigerator and various fluid and drive unit.The Performance and quality of these materials directly has influence on sealing, the service life of various machinery and device.Traditional encapsulant applies the asbestos latex plate primarily of asbestos, latex and other auxiliary agent composition in large quantities.Asbestos latex plate has preferably physical property, as: good flexibility and compression and back elastic force, lower stress relaxation, good sealing.But because asbestos latex contains asbestos, have damaging effect to human body, therefore asbestos latex plate is little by little replaced by without asbestos emulsoid wet board.At present, high quantitatively (quantitative > 120g/m
2) be adopt batch process production technology without asbestos emulsoid wet board, namely be after the fibrous raw material of non-asbestos, filler, latex and various auxiliary agent are made slurry by formula, in web part of paper machine repeatedly starching, wet web is layering compressed together by forming rolls after shaping, arrive thickness required by collecting plate or quantitatively after, wet web is peeled from format roll, and then air dry drying, press polish vulcanizing treatment, obtain collecting plate finished product.Production efficiency is low, the defect of poor product quality for high quantitative the also existing without asbestos emulsoid wet board of this explained hereafter.
Summary of the invention
The object of the invention is to the defect overcoming above-mentioned prior art, provide a kind of continuous prodution the high quantitative method without asbestos emulsoid wet board, the method production efficiency is high, good product quality.
For achieving the above object, the present invention adopts following technical scheme:
A kind of high quantitative method without asbestos emulsoid wet board of continuous prodution, first by the fibrous raw material of non-asbestos, filler, latex and the uniform paper pulp of function additive furnishing, polyacrylamide and bentonite is added, again sequentially through steps of processing after furnishing slurry in paper pulp:
A) slurry enters cloth slurry rectification in head box;
B) starching: slurry is entered to copy by head box to be got online, gets online slurry and reaches required quantitative, copy the surrounding of getting net and be provided with baffle until copy, slurry is formed two-layer up and down on the net copying to get, and upper strata is water layer, and lower floor is pulp layer;
C) method of employing vacuum draw makes to copy to get to net to absorb and copies the water layer getting net;
D) pulp layer is copied the Wiper blade getting sieve bottom dewater by being arranged on, and then enter vacuum tank dehydration, begin to take shape without asbestos emulsoid wet board, then carry out suction press and grooved press to without asbestos emulsoid wet board, make the moisture without asbestos emulsoid wet board be 40 ~ 45wt%;
E) dry.
Preferably, the addition of polyacrylamide is 0.04 ~ 0.06% of the fibrous raw material of non-asbestos, and bentonitic addition is 0.2 ~ 0.3% of the fibrous raw material of non-asbestos.
Preferably, in order to the slurry in head box can either can evenly be shaped again by rapid dehydration, the bottom of described head box is provided with two doctor-rolls, is provided with homogenate gear between two doctor-rolls, such that slurry high wadding in head box is poly-, microturbulent motion, uniformity.
Preferably, the rotating speed of described doctor-roll is 100r/min
.
Preferably, the vacuum of vacuum tank is 0.1 ~ 0.2Mpa.
Preferably, the pressure of suction press is 0.07Mpa.
Preferably, the pressure of grooved press is 0.25 ~ 0.35Mpa, and the rill furrow width of grooved press roller is 0.5mm, and ditch depth is 1.2mm.
Compared with prior art, the invention has the beneficial effects as follows:
1, paper pulp with the addition of before entering head box by polyacrylamide and bentonite mix form help stream filter aid, copy at paper machine after making slurry rectification and get poly-dehydration of can wadding a quilt with cotton rapidly on the net, for high quantitative the laying a good foundation without asbestos emulsoid wet board of disposable production, paper machine collecting plate can quantitative 1800g/m
2above collecting plate, breaching prior art the highest is quantitatively 1300g/m
2restriction, such that disposable production is high quantitative becomes possibility without asbestos emulsoid wet board;
2, in head box, establish doctor-roll and homogenate baffle plate, slurry is produced in motion process, and high wadding is poly-, fine motion, reaches the effect of slurry uniformity, slurry is evenly distributed on copy to get online rapid dehydration, be evenly shaped;
3, paper machine is destroyed the edge getting net and is provided with baffle, and make high quantitative slurry can form water layer and pulp layer on the net copying to get, water layer is extracted by the method for vacuum draw, lays a good foundation further for producing high quantitative collecting plate; Pulp layer combines process by Wiper blade dehydration, vacuum tank dehydration, suction press dehydration and the multiple physical mechanical dewatering type of grooved press wringer, the moisture of collecting plate is reduced to 40 ~ 45wt%, both the energy had been saved for follow-up oven dry, too increase tightness and the intensity of collecting plate, improve the character on its surface simultaneously, as smoothness, ensure that the quality without asbestos emulsoid wet board with excellence that the height of continuous prodution is quantitative.
Accompanying drawing explanation
Fig. 1 is the structural representation of approach system before paper machine net of the present invention;
Fig. 2 is the structural representation of suction press system of the present invention;
Fig. 3 is the structural representation of grooved press system of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the high quantitative method without asbestos emulsoid wet board of a kind of continuous prodution of the present invention is described in further detail.
Embodiment 1
A kind of high quantitative method without asbestos emulsoid wet board of continuous prodution, first non-asbestos fiber raw material is dropped in water and disperse, after adding filler making beating, mix after adding colouring agent, latex, vulcanizing agent, age resistor by recipe requirements, make paper pulp, then paper pulp is sent into approach system before paper machine net, paper pulp is after fan pump, pressurized screen, add the polyacrylamide of 0.05% of non-asbestos fiber raw material weight and the bentonite of 0.25% of non-asbestos fiber raw material weight, again sequentially through steps of processing after furnishing slurry:
A) slurry enters cloth slurry rectification in head box 16;
B) starching: slurry is entered into by head box 16 and is positioned at copying of head box grout outlet and gets on net 17, gets online slurry reach 1800g/m until copies
2, copying that the edge getting net is provided with is highly the baffle of 20cm, and slurry is formed two-layer up and down on the net copying to get, and upper strata is water layer 11, and lower floor is pulp layer 12;
C) method of vacuum draw is adopted to make to copy and get net and absorb and copy the water layer getting net: outstandingly above net 17 be provided with pulp-water separator box 8 copying to get, the vacuum dehydration pipe 5 in pulp-water separator box 8 absorbs water layer 11 and discharges;
D) pulp layer 12 is copied the Wiper blade 10 got bottom net 17 dewater by being arranged on, and then enter vacuum tank 9 and dewater, begin to take shape without asbestos emulsoid wet board, again to carrying out a suction press and three grooved press without asbestos emulsoid wet board, the moisture without asbestos emulsoid wet board is made to be 40 ~ 45wt%;
E) dry.
Please refer to Fig. 1, before paper machine net of the present invention approach system primarily of suction couch roll 1, breast roll 2, first felt leading roll 3, second felt leading roll 4, vacuum dehydration pipe 5, doctor-roll 6, homogenate baffle plate 7, pulp-water separator box 8, vacuum tank 9, Wiper blade 10, idler roller 13, adjust blanket roller 14, aqueduct shower nozzle 15, head box 16, copy and get net 17 and form.
Step a) in head box 16 be provided with two doctor-rolls 6 in bottom, described doctor-roll 6 is hollow cylindrical, cylindrical wall is drilled with the circular hole that many diameters are 25mm, between two doctor-rolls 6, be also provided with a homogenate baffle plate 7, homogenate baffle plate 7 can up-down adjustment, and two doctor-rolls 6 are separated by homogenate baffle plate 7, one in front and one in back, they rotate with the speed of 100r/min in head box, and make the poly-slurry of high wadding produce microturbulent motion, slurry can be evenly distributed on to copy and get on net 17.
Please refer to Fig. 2, suction press system is made up of felt leading roll 21, tune blanket roller 22, tight blanket roller 23, vacuum furnace 24 and upper squeezing rubber roll 25.Be shaped without asbestos emulsoid wet board after the squeezing effect of vacuum furnace 24 and upper squeezing rubber roll 25, portion of water is extruded.Please refer to Fig. 3, grooved press system is made up of felt leading roll 31, tune blanket roller 32, tight blanket roller 33, first pair of grooved press roller 34, second pair of grooved press roller 35, the 3rd pair of grooved press roller 36, be shaped without asbestos emulsoid wet board after the squeezing effect of first pair of grooved press roller, 34, second pair of grooved press roller 35, the 3rd pair of grooved press roller 36, slough internal moisture further.
Steps d) in the vacuum of vacuum tank be 0.1 ~ 0.2Mpa, the pressure of suction press is 0.07Mp, and the pressure of grooved press is 0.25 ~ 0.35Mpa, and the rill furrow width of grooved press roller is 0.5mm, and ditch depth is 1.2mm.
Embodiment 2
The difference of the present embodiment and embodiment 1 is, the addition of polyacrylamide is 0.04% of non-asbestos fiber raw material weight, and bentonitic addition is 0.2% of non-asbestos fiber raw material weight.
Embodiment 3
The difference of the present embodiment and embodiment 1 is, the addition of polyacrylamide is 0.06% of non-asbestos fiber raw material weight, and bentonitic addition is 0.3% of non-asbestos fiber raw material weight.
Above-described embodiment is only the preferred embodiment of the present invention, can not limit protection scope of the present invention with this, and change and the replacement of any unsubstantiality that those skilled in the art does on basis of the present invention all belong to protection scope of the present invention.
Claims (5)
1. the high quantitative method without asbestos emulsoid wet board of continuous prodution, first by the fibrous raw material of non-asbestos, filler, latex and the uniform paper pulp of function additive furnishing, it is characterized in that: in paper pulp, add polyacrylamide and bentonite, again sequentially through steps of processing after furnishing slurry:
A) slurry enters cloth slurry rectification in head box;
B) starching: slurry is entered to copy by head box to be got online, gets online slurry and reaches required quantitative, copy the surrounding of getting net and be provided with baffle until copy, slurry is formed two-layer up and down on the net copying to get, and upper strata is water layer, and lower floor is pulp layer;
C) method of employing vacuum draw makes to copy to get to net to absorb and copies the water layer getting net;
D) pulp layer is copied the Wiper blade getting sieve bottom dewater by being arranged on, and then enter vacuum tank dehydration, begin to take shape without asbestos emulsoid wet board, then carry out suction press and grooved press to without asbestos emulsoid wet board, make the moisture without asbestos emulsoid wet board be 40 ~ 45wt%;
E) dry;
The bottom of described head box is provided with two doctor-rolls, is provided with homogenate baffle plate between two doctor-rolls, and the rotating speed of described doctor-roll is 100r/min.
2. the high quantitative method without asbestos emulsoid wet board of continuous prodution as claimed in claim 1, it is characterized in that: the addition of polyacrylamide is 0.04 ~ 0.06% of the fibrous raw material of non-asbestos, bentonitic addition is 0.2 ~ 0.3% of the fibrous raw material of non-asbestos.
3. the high quantitative method without asbestos emulsoid wet board of continuous prodution as claimed in claim 1, is characterized in that: the vacuum of vacuum tank is 0.1 ~ 0.2Mpa.
4. the high quantitative method without asbestos emulsoid wet board of continuous prodution as claimed in claim 1, is characterized in that: the pressure of suction press is 0.07Mpa.
5. the high quantitative method without asbestos emulsoid wet board of continuous prodution as claimed in claim 1, it is characterized in that: the pressure of grooved press is 0.25 ~ 0.35Mpa, the rill furrow width of grooved press roller is 0.5mm, and ditch depth is 1.2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210305424.XA CN102817272B (en) | 2012-08-23 | 2012-08-23 | Method for continuous production of high-volume asbestos-free latex isolating sheet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210305424.XA CN102817272B (en) | 2012-08-23 | 2012-08-23 | Method for continuous production of high-volume asbestos-free latex isolating sheet |
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| CN102817272A CN102817272A (en) | 2012-12-12 |
| CN102817272B true CN102817272B (en) | 2015-01-07 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4284471A (en) * | 1977-09-28 | 1981-08-18 | Rockwool Aktiebolaget | Method for the production of a fibrous mat |
| CN1141230A (en) * | 1995-07-25 | 1997-01-29 | 舟山市海山密封材料有限公司 | Non-asbestos expanding type sealing plate and method for making same |
| US5679433A (en) * | 1991-10-31 | 1997-10-21 | Kabushiki Kaish Tokiwa Denki | Noncombustible sheet, noncombustible laminated sheet, noncombustible honey comb structural material, noncombustible board, noncombustible molded product, and manufacturing method thereof |
| CN101037855A (en) * | 2007-04-03 | 2007-09-19 | 陕西科技大学 | Method for preparation of asbestos-free or non-asbestos latexes sheet |
| CN101105022A (en) * | 2005-05-18 | 2008-01-16 | 陕西科技大学 | Method for preparing non-asbestos latex sheet |
| CN101195982A (en) * | 2006-05-15 | 2008-06-11 | 陕西科技大学 | Method for producing non-zillerite latex sheets |
-
2012
- 2012-08-23 CN CN201210305424.XA patent/CN102817272B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4284471A (en) * | 1977-09-28 | 1981-08-18 | Rockwool Aktiebolaget | Method for the production of a fibrous mat |
| US5679433A (en) * | 1991-10-31 | 1997-10-21 | Kabushiki Kaish Tokiwa Denki | Noncombustible sheet, noncombustible laminated sheet, noncombustible honey comb structural material, noncombustible board, noncombustible molded product, and manufacturing method thereof |
| CN1141230A (en) * | 1995-07-25 | 1997-01-29 | 舟山市海山密封材料有限公司 | Non-asbestos expanding type sealing plate and method for making same |
| CN101105022A (en) * | 2005-05-18 | 2008-01-16 | 陕西科技大学 | Method for preparing non-asbestos latex sheet |
| CN101195982A (en) * | 2006-05-15 | 2008-06-11 | 陕西科技大学 | Method for producing non-zillerite latex sheets |
| CN101037855A (en) * | 2007-04-03 | 2007-09-19 | 陕西科技大学 | Method for preparation of asbestos-free or non-asbestos latexes sheet |
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| CN102817272A (en) | 2012-12-12 |
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Effective date of registration: 20190321 Address after: 473000 East Industrial Park, Neixiang County, Nanyang City, Henan Province (Luandong Town) Patentee after: Nanyang Guoyu Industrial Co., Ltd. Address before: 474350 Yundu Avenue and Changfeng Road Intersection, Neixiang County, Nanyang City, Henan Province Patentee before: Nanyang GuoYu Seal Development Co., Ltd. |