CN103802330A - Preparation method of boot sleeve applicable to boot-shaped squeezing roller - Google Patents
Preparation method of boot sleeve applicable to boot-shaped squeezing roller Download PDFInfo
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- CN103802330A CN103802330A CN201410054517.9A CN201410054517A CN103802330A CN 103802330 A CN103802330 A CN 103802330A CN 201410054517 A CN201410054517 A CN 201410054517A CN 103802330 A CN103802330 A CN 103802330A
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- polyurethane
- layer
- boots
- preparation
- cast
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/36—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and impregnating by casting, e.g. vacuum casting
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Abstract
The invention discloses a preparation method of a boot sleeve applicable to a boot-shaped squeezing roller. The preparation method comprises the steps of coating a die with a mould release agent, pouring bottom-layer polyurethane, weaving a reinforced Kevlar fiber yarn layer, pouring core-layer polyurethane, sheathing a core net, pouring a surface-layer polyurethane layer and cutting grooves. The boot sleeve produced by adopting the method is reasonable in structure, high in stability, strong in crack resistance, high in surface hardness, not prone to damage, long in service life and applicable to high-speed paper machines; when being used, the boot sleeve produced by adopting the method is strong in squeezing and dewatering performance and good in wet paper water squeezing property; produced paper is smooth and stable.
Description
Technical field
The preparation method that the present invention relates to a kind of paper machine shoe-press roller boots cover, relates to paper machine squeezing field.
Background technology
Paper machine shoe-press roller is the important shaping of paper machine wet end and drainage facilities, and boots cover is a kind of squeeze set, is exclusively used in shoe press roll.Conventional paper machines pressure roller nip is narrow, and while improving line pressure, pressure concentration easily causes the conquassation of page, has limited page dehydration; Press with large-roll-diameter roller has increased nip width to a certain extent, can suitably improve line pressure, but still can not meet the requirement of high-speed paper machine; Early 1980s has been released wide nip press or time delay squeezing (being called for short ENP), also referred to as shoe press, this squeezing has very wide nip (general width is 200～310 mm(typical length 254mm), 6～10 times of traditional squeezing width (20～60 mm), can adopt up to 1500 kN/m(tradition squeezings lower than 100 kN/m) linear pressure, this has just realized a leap of dehydration aspect, very applicable for high-speed paper machine.
Paper machine directly affects the quality of paper with boots cover, paper industry dog-eat-dog at present, and paper machine overlaps 100% dependence on import by press shoe.Although existing high speed paper machine can complete into shaping, squeezing and the dehydration task of page substantially with press shoe cover, but its weak point is boots cover in use easily to be cracked from the bight of ditch end, easily there are damage, the wearing and tearing on inner be full of cracks and surface, and the tendency that exists the papery of squeezing and the flatness of wet paper surface to worsen, cause paper machine squeezing shoe cover dehydrating amount not, can only low pressure squeezing extruding, at the bottom of drained strength, papery is unsmooth, the inadaptable high speed paper machine product of producing.
Summary of the invention
The invention provides a kind of shoe-press roller boots and overlap preparation method, boots cover wearability and the hardness of making have both, and are applicable to very much current high speed paper machine and use.
The present invention seeks to be achieved through the following technical solutions: its step comprises:
(1), the surface of clean boots sleeve forming mould, on boots sleeve forming mould, spray releasing agent;
(2), on boots sleeve forming mould, evenly pour into a mould bottom polyurethane (polyurethane), polyurethane adopts PAUR, cast thickness is 1～2.2 mm, when cast, adopt flame froth breaking method to guarantee there is no Bubble formation, wherein in polyurethane, be added with in advance polyurethane dedicated defoamer, adding proportion is 0.1～0.5%wt;
(3), before bottom layer of polyurethane does not solidify completely, strengthen Kafra fiber yarn along the horizontal stretching anti-tensile of mold cores, and longitudinally add this yarn simultaneously, make to strengthen Kafra fiber and cover bottom layer of polyurethane surface;
(4), before bottom layer of polyurethane does not solidify completely, at Kafra fiber thread layers upper sandwich layer polyurethane, Kafra fiber thread layers and bottom layer of polyurethane are closely linked, cast thickness is 1～1.5 mm, when cast, adopt flame froth breaking method to guarantee there is no Bubble formation, polyurethane adopts PAUR, is added with in advance the polyurethane defoamer of 0.1～0.7%wt;
(5), after sandwich layer layer of polyurethane cooling curing, processing sandwich layer layer of polyurethane cured layer is to pre-set dimension;
(6), on the sandwich layer layer of polyurethane processing, put core net, core net is woven with polyester fiber or nylon fiber in advance;
(7), on the boots sleeve forming mould that puts core net rotary casting 3-5 layer polyurethane as surface layer layer of polyurethane, when cast, adopt flame froth breaking method to guarantee there is no Bubble formation, polyurethane adopts EU, be added with in advance the polyurethane dedicated defoamer of 0.1～0.6%wt, each cast all should be carried out before last layer layer of polyurethane do not solidify completely, and every layer thickness is controlled at 0.8～1.2mm;
(8), after surface layer layer of polyurethane cooling curing, processing is ground to pre-set dimension, and goes out the rill of certain density in its surperficial turning, the degree of depth 1.0～1.5 mm of rill, width 0.7～1.3 mm.
Preferably, in step (2), cast thickness is 2mm, and polyurethane dedicated defoamer adding proportion is 0.3%wt.
Preferably, in step (4), cast thickness is 1.2mm, and polyurethane dedicated defoamer adding proportion is 0.5%wt.
Preferably, in step (7), 4 layers of polyurethane of rotary casting are as surface layer layer of polyurethane, and every layer thickness is 1mm, and polyurethane dedicated defoamer adding proportion is 0.4%wt.
Preferably, in step (8), the degree of depth of rill is 1.2mm, and width is 1 mm.
Preferably, pouring into a mould PAUR used adopts Shore hardness at 90～100 polyurethane.
Preferably, pour into a mould EU used and adopt the polyurethane of Shore hardness more than 95.
The bottom that the boots of the inventive method overlap and surface layer adopt the polyurethane of variety classes, different hardness to pour into a mould, and because bottom needs contact lubricated cold oil, therefore adopt PAUR, and its hardness is lower, and pliability is better, the anti-oil solution of energy, wear-resisting, high temperature resistant; What surface layer contacted is l Water Paper, therefore adopts the EU that hardness is higher.For improving the stability of boots cover, on bottom, be woven with and strengthen Kafra fiber yarn, strengthen that Kafra fiber thread density is low, intensity is high, good toughness, high temperature resistant, be easy to processing and moulding, its intensity is 5 times of equal quality iron and steel, but density is only 1/5th of iron and steel.For improving the effect of prestressed of boots covers, in the polyurethane of cast, be added with defoamer, and adopt flame froth breaking method to guarantee there is no Bubble formation when cast.The Boot sleeve structure that the inventive method is produced is reasonable, stability is high, anti-crack ability is strong, case hardness is high, not easy damaged, long service life is suitable for high speed paper machine and uses, and it is level and smooth, stable that when the boots cover of the inventive method production uses, press dewatering performance is strong, l Water Paper squeezes water-based papery better, that produce.
The specific embodiment
embodiment 1
This shoe-press roller overlaps preparation method with boots, and its step comprises:
(1), the surface of clean boots sleeve forming mould, on boots sleeve forming mould, spray releasing agent;
(2), on boots sleeve forming mould, evenly pour into a mould bottom polyurethane (polyurethane), polyurethane adopts QT type polyester-polyurethane, cast thickness is 2mm, when cast, adopt flame froth breaking method to guarantee there is no Bubble formation, wherein in polyurethane, be added with in advance polyurethane dedicated defoamer XD-770, adding proportion is 0.3%wt, its Shore hardness 92～93 of QT type polyester-polyurethane, and bending break stiffness is at 4.6 N/mm
2, in 80 ℃ of running water, soak the swelling ratio 2.4% after 72 hours;
(3), before bottom layer of polyurethane does not solidify completely, strengthen Kafra fiber yarn Fanglun l414 along the horizontal stretching anti-tensile of mold cores, and longitudinally add this yarn simultaneously, make to strengthen Kafra fiber and cover bottom layer of polyurethane surface;
(4), before bottom layer of polyurethane does not solidify completely, at Kafra fiber thread layers upper sandwich layer polyurethane, Kafra fiber thread layers and bottom layer of polyurethane are closely linked, cast thickness is 1.2 mm, when cast, adopt flame froth breaking method to guarantee there is no Bubble formation, polyurethane adopts QT type polyester-polyurethane, is added with in advance the polyurethane defoamer DF-8205/879 of 0.5%wt;
(5), after sandwich layer layer of polyurethane cooling curing, processing sandwich layer layer of polyurethane cured layer is to pre-set dimension;
(6), on the sandwich layer layer of polyurethane processing, put core net, core net is woven with polyester fiber or nylon fiber in advance;
(7), on the boots sleeve forming mould that puts core net 4 layers of polyurethane of rotary casting as surface layer layer of polyurethane, when cast, adopt flame froth breaking method to guarantee there is no Bubble formation, polyurethane adopts QX type polyether-polyurethane, be added with in advance the polyurethane dedicated defoamer of 0.4%wt, defoamer adopts the compound prescription that XD-770:DF-8205/879 volume ratio is 1:2, each cast all should be carried out before last layer layer of polyurethane do not solidify completely, and every layer thickness is controlled at 1mm;
(8), after surface layer layer of polyurethane cooling curing, processing is ground to pre-set dimension, and goes out the rill of certain density in its surperficial turning, the degree of depth 1.2 mm of rill, width 1 mm.
embodiment 2
This shoe-press roller overlaps preparation method with boots, and its step and embodiment 1 are basically identical, and its difference is:
In step (2), cast thickness is 1mm, and polyurethane dedicated defoamer adding proportion is 0.1%wt;
In step (4), cast thickness is 1mm, and polyurethane dedicated defoamer adding proportion is 0.1%wt;
In step (7), cast adopts QVT type polyether-polyurethane, the surface layer layer of polyurethane cast number of plies is 5 layers, every layer thickness is 0.8mm, is added with in advance the polyurethane dedicated defoamer of 0.1%wt, and defoamer adopts the compound prescription that XD-770:DF-8205/879 volume ratio is 2:1;
In step (8), the degree of depth of rill is 1mm, and width is 0.7 mm.
embodiment 3
This shoe-press roller overlaps preparation method with boots, and its step and embodiment 1 are basically identical, and its difference is:
In step (2), cast thickness is 2.2mm, and polyurethane dedicated defoamer adding proportion is 0.5%wt;
In step (4), cast thickness is 1.5mm, and polyurethane dedicated defoamer adding proportion is 0.7%wt;
In step (7), cast adopts QVT type polyether-polyurethane, the surface layer layer of polyurethane cast number of plies is 2 layers, every layer thickness is 1.2mm, is added with in advance the polyurethane dedicated defoamer of 0.6%wt, and defoamer adopts the compound prescription that XD-770:DF-8205/879 volume ratio is 1:1;
In step (8), the degree of depth of rill is 1.5mm, and width is 1.3 mm.
The shoe-press roller boots that above-mentioned three embodiment obtain are enclosed within on the shoe-press roller of high speed paper machine and use, and the papery of producing is smooth, conforms to quality requirements completely.
Claims (7)
1. shoe-press roller overlaps a preparation method with boots, and its step comprises:
(1), the surface of clean boots sleeve forming mould, on boots sleeve forming mould, spray releasing agent;
(2), on boots sleeve forming mould, evenly pour into a mould bottom polyurethane, polyurethane adopts PAUR, cast thickness is 1～2.2 mm, when cast, adopt flame froth breaking method to guarantee there is no Bubble formation, wherein in polyurethane, be added with in advance polyurethane dedicated defoamer, adding proportion is 0.1～0.5%wt;
(3), before bottom layer of polyurethane does not solidify completely, strengthen Kafra fiber yarn along the horizontal stretching anti-tensile of mold cores, and longitudinally add this yarn simultaneously, complete the braiding that strengthens Kafra fiber;
(4), before bottom layer of polyurethane does not solidify completely, at Kafra fiber thread layers upper sandwich layer polyurethane, Kafra fiber thread layers and bottom layer of polyurethane are closely linked, cast thickness is 1～1.5 mm, when cast, adopt flame froth breaking method to guarantee there is no Bubble formation, polyurethane adopts PAUR, is added with in advance the polyurethane defoamer of 0.1～0.7%wt;
(5), after sandwich layer layer of polyurethane cooling curing, processing sandwich layer layer of polyurethane cured layer is to pre-set dimension;
(6), on the sandwich layer layer of polyurethane processing, put core net, core net is woven with polyester fiber or nylon fiber in advance;
(7), on the boots sleeve forming mould that puts core net rotary casting 3-5 layer polyurethane as surface layer layer of polyurethane, when cast, adopt flame froth breaking method to guarantee there is no Bubble formation, polyurethane adopts EU, be added with in advance the polyurethane dedicated defoamer of 0.1～0.6%wt, each cast all should be carried out before last layer layer of polyurethane do not solidify completely, and every layer thickness is controlled at 0.8～1.2mm;
(8), after surface layer layer of polyurethane cooling curing, processing is ground to pre-set dimension, and goes out the rill of certain density in its surperficial turning, the degree of depth 1.0～1.5 mm of rill, width 0.7～1.3 mm.
2. shoe-press roller according to claim 1 overlaps preparation method with boots, it is characterized in that: in step (2), cast thickness is 2mm, and polyurethane dedicated defoamer adding proportion is 0.3%wt.
3. shoe-press roller according to claim 2 overlaps preparation method with boots, it is characterized in that: in step (4), cast thickness is 1.2mm, and polyurethane dedicated defoamer adding proportion is 0.5%wt.
4. shoe-press roller according to claim 3 overlaps preparation method with boots, it is characterized in that: in step (7), 4 layers of polyurethane of rotary casting are as surface layer layer of polyurethane, and every layer thickness is 1mm, and polyurethane dedicated defoamer adding proportion is 0.4%wt.
5. shoe-press roller according to claim 4 overlaps preparation method with boots, it is characterized in that: in step (8), the degree of depth of rill is 1.2mm, and width is 1 mm.
6. shoe-press roller according to claim 1 overlaps preparation method with boots, it is characterized in that: pour into a mould PAUR used and adopt the polyurethane of Shore hardness at 90-100.
7. shoe-press roller according to claim 6 overlaps preparation method with boots, it is characterized in that: pour into a mould EU used and adopt the polyurethane of Shore hardness more than 95.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410054517.9A CN103802330B (en) | 2014-02-18 | 2014-02-18 | Shoe-press roller boots overlap manufacture method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410054517.9A CN103802330B (en) | 2014-02-18 | 2014-02-18 | Shoe-press roller boots overlap manufacture method |
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| Publication Number | Publication Date |
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| CN103802330A true CN103802330A (en) | 2014-05-21 |
| CN103802330B CN103802330B (en) | 2016-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410054517.9A Active CN103802330B (en) | 2014-02-18 | 2014-02-18 | Shoe-press roller boots overlap manufacture method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1816660A (en) * | 2003-07-02 | 2006-08-09 | 阿尔巴尼国际公司 | Low permeability textile substrate for a two-sided coated product |
| JP2008285784A (en) * | 2007-05-18 | 2008-11-27 | Ichikawa Co Ltd | Belt for shoe press |
| CN102190881A (en) * | 2010-02-19 | 2011-09-21 | 市川株式会社 | Papermaking process belt and method for making the same |
| WO2012104480A1 (en) * | 2011-01-31 | 2012-08-09 | Metso Fabrics Inc. | Shoe press belt, method for manufacturing the same, and use in shoe press |
| CN103243602A (en) * | 2012-02-01 | 2013-08-14 | 市川株式会社 | Paper making shoe press belt |
-
2014
- 2014-02-18 CN CN201410054517.9A patent/CN103802330B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1816660A (en) * | 2003-07-02 | 2006-08-09 | 阿尔巴尼国际公司 | Low permeability textile substrate for a two-sided coated product |
| JP2008285784A (en) * | 2007-05-18 | 2008-11-27 | Ichikawa Co Ltd | Belt for shoe press |
| CN102190881A (en) * | 2010-02-19 | 2011-09-21 | 市川株式会社 | Papermaking process belt and method for making the same |
| WO2012104480A1 (en) * | 2011-01-31 | 2012-08-09 | Metso Fabrics Inc. | Shoe press belt, method for manufacturing the same, and use in shoe press |
| US20130269895A1 (en) * | 2011-01-31 | 2013-10-17 | Metso Fabrics Inc. | Shoe press belt, method for manufacturing the same, and use in shoe press |
| CN103243602A (en) * | 2012-02-01 | 2013-08-14 | 市川株式会社 | Paper making shoe press belt |
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| CN103802330B (en) | 2016-10-19 |
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