CN1210172A - Functional epoxy-silicone coatings for paper machine clothings and method of coating same - Google Patents

Functional epoxy-silicone coatings for paper machine clothings and method of coating same Download PDF

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Publication number
CN1210172A
CN1210172A CN98116226A CN98116226A CN1210172A CN 1210172 A CN1210172 A CN 1210172A CN 98116226 A CN98116226 A CN 98116226A CN 98116226 A CN98116226 A CN 98116226A CN 1210172 A CN1210172 A CN 1210172A
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Prior art keywords
coating
fabric
cloth
paper machine
quality
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CN98116226A
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Chinese (zh)
Inventor
B·卡斯特尔
A·布姆加纳
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Albany International Corp
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Albany International Corp
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • D06N3/128—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with silicon polymers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/0027—Screen-cloths
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/30—Protecting wire-cloths from mechanical damage

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Paper (AREA)
  • Laminated Bodies (AREA)

Abstract

The present invention is directed to fabrics for paper making machines that are rendered contamination resistant and maintain good permeability as a result of a durable coating that lasts the entire life of the fabric. A silicone-epoxy will render the fabric contamination resistant over the entire fabric lifetime.

Description

Functionalization epoxy radicals-the polysiloxane coating materials and the coating method thereof of paper machine cloth
The present invention relates to have the fabric of resistant to pollution paper machine, its resistance tocrocking is to provide by the durable coating suitable with the life-span of fabric, and this coating does not exceedingly influence the permeability of fabric simultaneously.
Modern paper manufacturers is generally used very senior paper machine, and its core is to remove the device that anhydrates from the paper batching.Removing of water is sequentially to remove at the three phases of paper machine or partly.First or shaped portion, batching precipitates on a forming fabric that moves, and water is drained by fabric, page or the paper web of remaining about 18～25 weight % of solid content.The paper web that forms is moved to the press fabric part, and on a press fabric that moves through once or several times rolling a compacting, the water of removing capacity is to form the page of about 36～50 weight % of solid content.Then this page is moved to the drying nest of paper machine, here the fabric-supported of drier page, makes its processing of steam-heated drier cylinder that is subjected to heat, to obtain 92～96% solid content.The papermaking fabric that uses on paper machine, the diverse location according to its machine of living in promptly is shaped, compacting or drying nest, must have multiple different function.
The forming fabric that is used for paper-making process is the papermaking fabric that a class is used for the paper machine shaped portion.Forming fabric normally by constituting with fabric construction, the common synthetic threads that links together by braiding, is characterized in that it has the opened gap of height between crossed yarn.Forming fabric must keep the sparse property of height, anhydrates to guarantee to remove from precipitation fiber slurry thereon.
Because removing outlet capacity is a critical function of forming fabric, must guarantee that therefore this fabric keeps the sparse property of height at its life period.
Yet at the life period of fabric, its sparse property reduces gradually.Except that fiber slurry, contain the paper pulp of additive such as filler clay, pitch and polymeric material usually, also block the opened gap of fabric.A large amount of pollutants with printing ink, adhesive, tar and polymeric material form is introduced in the use of regenerated fiber, introduces a large amount of pollutants, and they also block the opened gap of fabric.In addition, the design of now forming fabric comprises multiply cloth, and this is easier to bring pollution problem.
Therefore, people are desirable to provide a kind of fabric with improved resistance tocrocking.A kind of prior art solutions of imagination is to use a kind of resistant to pollution yarn in fabric constitutes.This has been proved to be to be entirely satisfactory, since the resistance tocrocking that provides by this yarn, short and/or weak effect of its life-span.The solution of another imagination is to use coating or papermaking fabric is handled, to improve its resistance tocrocking.Equally, this method neither be very successful, since the resistance tocrocking that provides by this coating, short and/or weak effect of its life-span.
U.S.P.5207873 and 5395868 discloses has the fusible papermaking fabric of permanent antipollution thing.Scribble the solution that main component is tetrafluoroethylene, urethane copolymers and polyacrylamide on these fabrics.This coating is proved to be and is not in full force and effect, and/or is not nonvolatil on paper machine cloth.
Usually an intrinsic problem is in coating or processing, and coating itself has reduced the permeability of fabric, and its bad result who brings is the outlet capacity that removes that has reduced as the forming fabric major function.Therefore, its permeability of reduction that the coating of use on forming fabric should be few as far as possible, this is very important.
An object of the present invention is to provide a kind of fabric that is used for paper machine shaping, compacting or drying nest, this fabric has improved resistance tocrocking in its whole life-span.To those skilled in the art, these fabrics just refer to paper machine cloth, and these two kinds of terms can exchange usually.
Another object of the present invention provides a kind of durable coating that continues the whole life-span of fabric.
Another purpose of the present invention provides a kind of not obvious coating that influences the fabric pentration rate.
A further object of the present invention provides a kind of textile coating paper machine, that can realize above-mentioned purpose that is used for.
The present invention relates to a kind of coating fabrics that is used for paper machine, this fabric has improved its resistance tocrocking significantly in its whole life-span.On the other hand, the present invention relates to a kind of coating method that is used for the fabric of paper machine, purpose is to improve its resistance tocrocking.Formulation for coating material disclosed herein has improved the resistance tocrocking of fabric basically, reduces the permeability of fabric simultaneously not obviously, and does not increase the quality of fabric significantly.That is to say, the invention provides a kind of paper machine cloth coating thin, low weight, it makes the quality of fabric increase limited.
The inventor has now found that the coating that contains silicon-epoxy resin can make paper machine cloth have resistance tocrocking in the whole life-span of fabric.Suitable silicon-epoxy (silicon-epoxy) coating comprises the aqueous mixture that contains the silicone epoxy resin.It is believed that siloxanes-epoxy resin and polyester that forms paper machine cloth or nylon fiber silk produce bonding.Suitable siloxanes-composition epoxy resin can be by Decora Industries, Fort Edward, and New York is with trade name Wearlon Obtain.Preferred batching is Wearlon 2020-98, it is the resin batching of one or three components, contains the emulsion based on a kind of siloxanes-epoxy (silicone-epoxy), a kind of curing agent and a kind of crosslinking agent.These components can mix by the explanation of goods and use on fabric on the spot, also can further dilute on demand.
The fabric that has prepared effective resistance tocrocking, wherein textile coating batching contains 5～about 50% solid by weight, and the quality that the coating back increases is 0.1%～10%, based on the weight of the fabric of uncoated.The quality % that the coating back increases is:
Figure A9811622600051
Usually, when the solid content of coating or the quality that increases reduce, can keep the initial permeability of higher coating fabrics on coating.Water can be used to reduce solid content as a kind of diluent of preferred water based paint, and decreases the quality % that the coating back increases.Have now found that when the solid content of textile coating batching is 10～15 weight %, or the quality % that the coating back increases is, can keep the initial permeability of the very high level of fabric at 1～3% o'clock.Just, preferably, be about 90～99% of the initial permeability of fabric.In other words, the result of coating is permeability reduction only about 1～10%.Method coating fabrics that can any routine, be included in coating bathe in dipping, blade coating, pumping painting moves the film coating, narrow slit extrusion coating and brushing are touched or the coating device roller coat in spraying.It is effective that roller coat is touched in use.Can apply once, also can apply repeatedly.Processing subsequently need be removed excessive materials, by the explanation of specified raw material goods coating is carried out drying or curing then.These methods are known for a person skilled in the art.
Fig. 1 is under amplifying 5 times, the photo of the uncoated of contaminated fabric part.
Fig. 2 is for showing pollutant wherein, will being removed the video of back Fig. 1 by the fabric that computer generates.
Fig. 3 is under amplifying 5 times, the photo of the coating of contaminated fabric part.
Fig. 4 is if pollutant is arranged, for showing pollutant wherein, by the video of fabric being removed back Fig. 3 of computer generation.
Following embodiment will further specify the present invention and application thereof.Embodiment 1
At the part surface of the three layer forming fabric that is made of Polyester Filament, rather than on its all surfaces, coating can be by Decora Industries, Inc.of Fort Edward, the WEARLON that N.Y. obtains The aqueous solution of 2020-98 silicon-epoxy coating (49 weight % solid).With can be by Binks Mfg.Co.of Franklin Park, the Binks#7 spray gun that Illinois. obtains uses this coating proportioning with the form of individual layer.Vacuum is removed excessive liquid.Based on the weight of uncoated fabric, the quality that the coating back increases is 8.3%.The part of band applies, to be used as tester.
Fabric is installed in to test a machine goes up and move 3 days.What move on the machine is the paper pulp that is formed by 100% old corrugated container (OCC).Machine speed is 460-670 rice/minute (a 1500-2000 feet per minute clock).Without chemical, use slit shower (Needle Showers) down at 13.8 crust (200 pounds/square inch).After the test fabric is taken out and analyzes.Figure below relates to the treatment conditions after its outward appearance and the fabric taking-up.
Carry out contamination analysis at fabric portions.Fig. 1 and Fig. 3 are amplifying 5 times of photos of each part down.Then these photos are scanned into computer with gray scales.With this image be transformed into the bitmap file ( *The bmp file), and opens Microsoft Paintbrush (seeing Fig. 2 and Fig. 4), pollutant is coated with au bleu.Remove the fabric of grey, only remaining blue portion from image.Then this image is imported into the graphical analysis program of calculating blue picture element, and calculate the percentage of Polluted area.The result is as follows:
Embodiment pollutes %
1 uncoated 4.1
2 coatings 0.3
Compare with the zone of fabric uncoated, the zone of the fabric that all applied all demonstrates the raising of resistance tocrocking.Embodiment 2
With WEARLON 2020-98 polysiloxanes-epoxy coating batching is that 5～25 weight % are applied on the fabric with solid content.On treble cloths, apply three layers of coating by touching the roller coat coating device.The composition of batching is listed in the table 1.
Three different coating fabrics samples are carried out air permeability measure, and, get its mean value by the mensuration that applies the quality recruitment of being brought.When the solid content of coating proportioning is 15%, after the drying, coating back increase quality be 11.18 grams/square metre, or be 2.7% based on the weight of uncoated fabric.
Make one week of coating curing.Cut three samples from the fabric of each coating, and with it under following listed condition, carry out 8 hours power shower (high pressure showering) (vibrating slot shower).Data are listed in table 2 and 3.Listed quality in the table 2 is the quality of the 2 inch diameter samples that take off from fabric.The setting of power shower:
Fabric pulling force=6.83 thousand Ns/rice of 39 PLI
22.9 centimetres of the size of test fabric=107 inch * 9 in2s, 72 cm x
457 meters/minute of the speed of fabric on machine=1500 feet per minute clocks
Hydraulic pressure=400 pound/square inch 27.6 crust
Shower arm=150 time impact/minute
Be even covering, on the length direction of shower arm, nozzle be spaced apart 1 inch.
Because the needed environment and the time span (being 400 pounds/square inch in this case, 8 hours) thereof that exist in the power shower test, this test is the fine test to the coating durability.
Table 3 is based on the data of table 2.Table 3 is to be exposed between the uncoated fabric and coating fabrics under the power shower form of the change in air permeability and quality increase, the expression of his-and-hers watches 2 data.Because the air permeability of the coating fabrics of shower and the initial level that the quality increase does not all turn back to the uncoated fabric, therefore clearly, after being exposed to power shower, coating is still keeping.
Table 1 (% solid)
????25％ ????15％ ????10％ ????5％
Water (gallon) ????48.98 ????69.39 ????79.59 ????89.80
" A " be (gallon) partly ????40.82 ????24.49 ????16.33 ????8.16
" X " be (gallon) partly ????2.04 ????1.22 ????0.82 ????0.41
" B " be (gallon) partly ????8.16 ????4.90 ????3.27 ????1.63
Amount to ???100.00 ???100.00 ????100.00 ????100.00
Table 2
Band The % solid Before the coating back shower Coating back 1 week of shower
????0 Uncoated ????544 ????544
????7 ????5 ????532 ????529
????5 ????10 ????523 ????526
????3 ????15 ????519 ????521
????1 ????25 ????512 ????525
Band The % solid Before the coating back shower Coating back 1 week of shower
????0 Uncoated ????0.840 ????0.840
????7 ????5 ????0.847 ????0.844
????5 ????10 ????0.850 ????0.846
????3 ????15 ????0.863 ????0.856
????1 ????25 ????0.876 ????0.854
Table 3
Permeability (% minimizing)
Band The % solid Before the coating back shower Coating back 1 week of shower
????0 Uncoated ?????- ?????-
????7 ????5 ????2.33％ ????2.82％
????5 ????10 ????3.98％ ????3.37％
????3 ????15 ????4.59％ ????4.35％
????1 ????25 ????5.88％ ????3.49％
Quality (% increase)
Band The % solid Before the coating back shower Coating back 1 week of shower
????0 Uncoated ?????- ?????-
????7 ????5 ????0.75％ ????0.44％
????5 ????10 ????1.15％ ????0.71％
????3 ????15 ????2.70％ ????1.90％
????1 ????25 ????4.20％ ????1.59％

Claims (17)

1. antipollution paper machine cloth that is used for paper machine shaping, compacting or drying nest contains and is coated with the fabric of the siliceous epoxy coating of one deck at least.
2. the paper machine cloth of claim 1, wherein this coating is silicon-epoxy resin of using with aqueous mixture.
3. the paper machine cloth of claim 1, wherein based on the quality of cloth, the dried quality of coating increases to 0.1～10.0%.
4. the paper machine cloth of claim 1, wherein based on the quality of cloth, the dried quality of coating increases to 1.0～3.0%.
5. the paper machine cloth of claim 1, wherein coating is used with two-layer form at least.
6. the paper machine cloth of claim 1, the coating that wherein is applied on the cloth is cured.
7. the paper machine cloth of claim 1, wherein cloth is woven.
8. the paper machine cloth of claim 1, wherein cloth is multiply cloth.
9. one kind makes the resistant to pollution method of paper machine cloth, and this method comprises one deck epoxy silicone is at least imposed on step on the paper machine cloth.
10. the method for claim 9, wherein coating is by the spraying coating.
11. the method for claim 9, wherein coating is by touching the coating of roller coat coating device.
12. the method for claim 9, wherein coating is used with two-layer at least.
13. the method for claim 9, the coating that wherein is applied on the cloth is cured.
14. the method for claim 9, wherein fabric is a woven.
15. the method for claim 9, wherein fabric is a multiply cloth.
16. the method for claim 9, wherein based on the quality of cloth, the dried quality of coating increases to 0.1～10.0%.
17. the method for claim 9, wherein based on the quality of cloth, the dried quality of coating increases to 1.0～3.0%.
CN98116226A 1997-08-08 1998-08-07 Functional epoxy-silicone coatings for paper machine clothings and method of coating same Pending CN1210172A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US908,556 1986-09-18
US90855697A 1997-08-08 1997-08-08

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CN1210172A true CN1210172A (en) 1999-03-10

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JP (1) JPH11172593A (en)
KR (1) KR19990023136A (en)
CN (1) CN1210172A (en)
AU (1) AU6059098A (en)
BR (1) BR9802355A (en)
CA (1) CA2245274A1 (en)
ID (1) ID20663A (en)
NO (1) NO983619L (en)
ZA (1) ZA982563B (en)

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Publication number Priority date Publication date Assignee Title
JP4522212B2 (en) * 2004-09-29 2010-08-11 イチカワ株式会社 Paper transport felt and press machine of paper machine equipped with the paper transport felt

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57171790A (en) * 1980-12-06 1982-10-22 Nihon Felt Kk Papermaking cloth having anti-stain property
US5002801A (en) * 1988-10-31 1991-03-26 Albany International Corp. Paper machine fabrics having controlled release
US5207873A (en) * 1992-04-17 1993-05-04 Huyck Corporation Anti-contaminant treatment for papermaking fabrics

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AU6059098A (en) 1999-03-11
NO983619L (en) 1999-02-09
CA2245274A1 (en) 1999-02-08
KR19990023136A (en) 1999-03-25
BR9802355A (en) 1999-12-28
JPH11172593A (en) 1999-06-29
EP0896086A3 (en) 1999-10-13
NO983619D0 (en) 1998-08-06
EP0896086A2 (en) 1999-02-10
ZA982563B (en) 1998-10-08

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