WO2003031080A1 - Method and apparatus for coating both sides of a web - Google Patents
Method and apparatus for coating both sides of a web Download PDFInfo
- Publication number
- WO2003031080A1 WO2003031080A1 PCT/FI2002/000778 FI0200778W WO03031080A1 WO 2003031080 A1 WO2003031080 A1 WO 2003031080A1 FI 0200778 W FI0200778 W FI 0200778W WO 03031080 A1 WO03031080 A1 WO 03031080A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- web
- coating
- coating slip
- slip
- travel
- Prior art date
Links
- 238000000576 coating method Methods 0.000 title claims abstract description 83
- 239000011248 coating agent Substances 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000005484 gravity Effects 0.000 claims abstract description 12
- 238000007766 curtain coating Methods 0.000 claims description 23
- 238000001035 drying Methods 0.000 claims description 23
- 238000007605 air drying Methods 0.000 description 4
- 230000001427 coherent effect Effects 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/46—Pouring or allowing the fluid to flow in a continuous stream on to the surface, the entire stream being carried away by the paper
- D21H23/48—Curtain coaters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/007—Slide-hopper coaters, i.e. apparatus in which the liquid or other fluent material flows freely on an inclined surface before contacting the work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
- B05C9/04—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material to opposite sides of the work
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/80—Paper comprising more than one coating
- D21H19/84—Paper comprising more than one coating on both sides of the substrate
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/70—Multistep processes; Apparatus for adding one or several substances in portions or in various ways to the paper, not covered by another single group of this main group
- D21H23/72—Plural serial stages only
Definitions
- the invention concerns a method for two-sided coating of a moving paper or board web.
- the invention also concerns equipment for coating a moving paper or board web and including devices for applying a coating slip to a first surface of the web, devices for applying a coating slip to a second surface of the web as well as devices for drying the web, which has been coated on both sides.
- curtain coating In curtain coating, the coating slip is applied to the surface of the moving paper or board web from a nozzle gap located above the web transversely to the web's direction of travel, from which gap the coating slip falls on to the web surface as a curtain-like shower.
- Curtain coating is a contact-free coating method, wherein after the spreading of the coating slip no force is applied to the paper web in order to control the quantity of coating remaining on the web surface. For this reason, there are less breaks caused by breaking of the paper web and runnability is better than, for example, in the blade-coating method. With curtain coating a better coverage is achieved than with blade coating, but the smoothness of the coated sur- face is not so good.
- the curtain-coating beam Since the method utilises gravity, the curtain-coating beam must always be located above the web to be coated. This makes it impossible to coat both sides of the paper or board web at the same time.
- a normal procedure in one-sided coating is first to coat the first side of the web, dry the web completely, turn it upside down, coat the second side and dry the coated web once again. This requires long web transfers between two coating points as well as two complete sets of drying equipment.
- the invention aims at allowing two-sided coating of paper when using a gravity- based method for application of the coating slip.
- the method according to the invention is characterised by the features pre- sented in the characterising part of claim 1.
- the equipment according to the invention is characterised by the features presented in the characterising part of claim 6.
- the coating method according to the invention includes steps, wherein a) a coating slip is applied to the first surface of the web using a gravity-based method for application of the coating slip, b) the web's direction of travel is turned through 120 - 200°, c) the coating slip is applied to the second surface of the web using a gravity- based method for application of the coating slip, and d) both sides of the web are dried.
- the web's direction of travel may be turned once again in the step where both sides of the web have been coated.
- a turning roll or contact-free turning device is used as the turning equipment.
- the web may also be dried without contact in con- nection with the turning equipment.
- the gravity-based method for application of the coating slip may be curtain coating, coating of the MicroJet type, which is described in patent application FI 991498, or some other coating method working essentially in such a way that the application equipment must be located above the web.
- MicroJet coating the coating slip is directed through holes in the nozzle plate towards the surface of the moving web.
- One-sided coating can typically be performed on both sides of the web without any complete drying in between and without long transfers. Savings result due, among other things, to the fact that only one piece of drying equipment is needed and the coating machine is essentially shorter. Threading is short and free draws of the web are short, which improves the runnability of the machine.
- Figure 1 shows the layout of state-of-the-art coating equipment, wherein one side at a time is coated.
- Figure 2 shows the layout of two-sided curtain-coating equipment according to the invention.
- Figure 3 shows curtain-coating equipment for two-sided coating of the web.
- Figure 4 shows curtain-coating equipment, wherein the web is dried while it is being turned around.
- Figure 5 shows an alternative layout of the equipment according to the invention.
- the following is a study of the traditional way of performing coating of the web from one side at a time using curtain coating.
- a layout of a similar type is used e.g. in blade coating, which typically is a one-sided coating method.
- the paper web W is guided to travel under a first curtain- coating beam 11 , from which an even layer of coating slip is applied to the upper surface S A of the moving web W as a freely falling curtain.
- the coated side S A of the web is first dried without contact by infra-drying equipment 12 and then both sides of the web are dried without contact by air-drying equipment 13.
- the drying is finished as contact drying using steam-drying cylinders 14.
- the web W is then transported guided by guiding rolls 15 over a relatively long distance to turn it the other way round, in order to allow coating of the other side S B of the web.
- a second curtain-coating beam 16 is located, which is followed by infra-drying equipment 17 to dry the coated surface S B - Following then are air-drying equipment 18 and drying cylinders 19 for two-side drying of the web.
- the coated web W is moved further guided by guiding rolls 20 to a reel-up 21.
- Figure 2 illustrates how much the length of the coating machine is reduced by the way according to the invention of coating both sides of the web almost simultaneously. Partly the same reference numbers as in Figure 1 are used for parts corresponding to each other.
- a coating slip is applied using a first curtain-coating beam 11 , and the coated side is dried without contact using infra-drying equipment 12. Then the travelling direction of the web W is changed with the aid of two successive turning rolls 22 so much that after the change of direction the web will travel obliquely downwards towards the incoming direction of the web W.
- a layer of coating slip is applied to the second surface S B of web W by a second curtain-coating beam 16, which is fitted above the web W on its run travelling obliquely downwards.
- the web's direction of travel is again changed with the aid of two contact- free turning devices 23 and 24, whereby in the area remaining in between these devices the web's surface S B , which was coated last, is dried by infra-drying equipment 17. Then the completely coated web W is dried with the aid of air-drying equipment 13 and steam-drying cylinders 14.
- Figure 3 shows the principle of the curtain-coating equipment according to the invention, wherein the direction of travel of the web W to be coated is from above left down to the right and wherein the web's W direction of travel is turned around twice.
- a first curtain-coating beam 11 Above the first run of the web a first curtain-coating beam 11 is located, from which a layer of coating slip is dropped as a uniform curtain on to the first surface S A of web W.
- the web's W direction of travel is changed with the aid of one or more turning rolls 22 by 120 - 200° in such a way that after the turning roll 22 the web W will travel obliquely downwards towards its incoming direction.
- a second curtain-coating beam 16 is located above the web W and from this beam a layer of coating slip falls as a uniform curtain on to the second surface S B of web W.
- the direction of travel of the web W which has now been coated on both sides, is changed for a second time with the aid of a contact- free turning device 23 in such a way that the web W will once again travel in its original direction.
- the turning device 23 may be e.g. a TurnFloat turning device made by the applicant, wherein an air flow is blown against the web's W coated surface S A -
- an air cushion is formed between the web W and the turning device 23 to keep the moist and coated web W separate from the surface of the turning device 23.
- Figure 4 shows a solution, wherein the web's W coated surfaces S A , S B are dried without contact in connection with the change in the direction of travel of the web.
- an air impingement drier 25 After the second curtain- coating beam 16 both surfaces S A , S B of the web are wet, for which reason it is advantageous for the turning to use a turning-and-drying device 26 drying the web without contact on both sides, which device 26 is e.g. the turning-and-drying device made by the applicant under the product name TurnDry.
- Figure 5 shows a solution, wherein after the first curtain-coating beam 11 a first turning device 27 is used to turn the web W upwards to travel obliquely upwards towards the web's W incoming direction. At this section a second curtain-coating beam 16 is located above the web, whereupon the web's W direction of travel is changed with the aid of a second turning device 28 in such a way that it will once again travel in its original outgoing direction.
- curtain-coating beam there may be some other gravity-based coating device, such as, for example, a MicroJet beam, which is located above the web and where the coating is brought to the web from a distribution chamber through a sieve in the form of small jets, which merge on the web forming a coherent coating surface.
- a MicroJet beam which is located above the web and where the coating is brought to the web from a distribution chamber through a sieve in the form of small jets, which merge on the web forming a coherent coating surface.
- Figures 2 - 5 show such a form of application only, wherein the web's direction of travel is turned twice by 120 -200°, it is possible to embody the invention also in such a way that the web's direction of travel is changed only once.
- the claims are presented, which define the inventive idea, within the scope of which the various details of the invention may vary and differ from the above presentation, which was given by way of example only.
Landscapes
- Coating Apparatus (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Paper (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60230063T DE60230063D1 (en) | 2001-10-08 | 2002-10-03 | METHOD AND DEVICE FOR COATING BOTH SIDES OF A TRACK |
CA002463160A CA2463160C (en) | 2001-10-08 | 2002-10-03 | Method and apparatus for coating both sides of a web |
US10/492,038 US20050008785A1 (en) | 2001-10-08 | 2002-10-03 | Method and apparatus for coating both sides of a web |
JP2003534100A JP2005504898A (en) | 2001-10-08 | 2002-10-03 | Web double-side coating method and apparatus |
EP02764905A EP1465738B1 (en) | 2001-10-08 | 2002-10-03 | Method and apparatus for coating both sides of a web |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20011953 | 2001-10-08 | ||
FI20011953A FI20011953A0 (en) | 2001-10-08 | 2001-10-08 | Method and apparatus for coating a moving web |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003031080A1 true WO2003031080A1 (en) | 2003-04-17 |
Family
ID=8562013
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FI2002/000778 WO2003031080A1 (en) | 2001-10-08 | 2002-10-03 | Method and apparatus for coating both sides of a web |
Country Status (8)
Country | Link |
---|---|
US (1) | US20050008785A1 (en) |
EP (1) | EP1465738B1 (en) |
JP (1) | JP2005504898A (en) |
AT (1) | ATE415207T1 (en) |
CA (1) | CA2463160C (en) |
DE (1) | DE60230063D1 (en) |
FI (1) | FI20011953A0 (en) |
WO (1) | WO2003031080A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004001133A2 (en) * | 2002-06-24 | 2003-12-31 | Voith Paper Patent Gmbh | Device for coating and drying the front and back of a web, particularly one consisting of paper or cardboard |
DE10349122A1 (en) * | 2003-10-22 | 2005-05-25 | Voith Paper Patent Gmbh | System for duplex coating of continuous feed material especially paper or card with sequential coating on sloping feeds an with the feed turned over between the coating processes |
EP1538263A1 (en) * | 2003-12-01 | 2005-06-08 | Voith Paper Patent GmbH | Coating device |
US7563326B2 (en) | 2002-06-24 | 2009-07-21 | Voith Paper Patent Gmbh | Device for coating and drying both sides of a material web of paper or board |
CN107159525A (en) * | 2017-07-11 | 2017-09-15 | 佛山市正略信息科技有限公司 | One kind protection film production line double spread wrap-up |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004045172A1 (en) * | 2004-09-17 | 2006-03-23 | Basf Ag | Process for the preparation of single or multiple coated substrates with a coating composition comprising a binder before adhesion |
US20090321001A1 (en) * | 2008-06-26 | 2009-12-31 | Seaman Corporation | One-pass direct double lamination apparatus and process |
JP6736247B2 (en) * | 2013-03-28 | 2020-08-05 | 日本製紙株式会社 | Coated white paperboard and manufacturing method thereof |
KR101430253B1 (en) | 2014-05-08 | 2014-09-23 | (주)하나 | Coating method for both sides of split leather and coating apparatus for the same |
CN109692787A (en) * | 2019-02-26 | 2019-04-30 | 浙江瑞旭汽车零部件有限公司 | The two-sided size applicator of filter material |
CN110644285A (en) * | 2019-09-19 | 2020-01-03 | 上海影佳实业发展有限公司 | Paper surface coating polyvinyl alcohol device |
KR102403955B1 (en) * | 2021-02-04 | 2022-06-03 | 박한수 | web paper coating apparatus |
KR102358580B1 (en) * | 2021-10-08 | 2022-02-09 | 에이치비페이퍼 주식회사 | web paper coating apparatus |
KR102382849B1 (en) * | 2021-10-08 | 2022-04-11 | 에이치비페이퍼 주식회사 | web paper coating apparatus |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US995327A (en) | 1892-10-31 | 1911-06-13 | Pollard Alling Mfg Company | Folding, wrapping, and addressing machine. |
GB1295536A (en) * | 1970-04-03 | 1972-11-08 | ||
US4455327A (en) * | 1977-03-22 | 1984-06-19 | Fuji Photo Film Co., Ltd. | Dual surface film coating of running web |
US5122386A (en) | 1989-05-01 | 1992-06-16 | Fuji Photo Film Co., Ltd. | Double side coating method |
DE19823740A1 (en) * | 1998-05-08 | 1999-11-11 | Voith Sulzer Papiertech Patent | Coating wet web of paper or cardboard |
FI991498A (en) | 1999-06-30 | 2000-12-31 | Valmet Corp | Method and apparatus for applying treatment substance to moving surface |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4209584A (en) * | 1979-06-15 | 1980-06-24 | Eastman Kodak Company | Manufacture of photographic elements having anticurl and antistatic layers |
US5136966A (en) * | 1988-10-28 | 1992-08-11 | Konica Corporation | Web coating apparatus |
DE4416399C2 (en) * | 1994-05-09 | 1999-04-01 | Voith Gmbh J M | Drying device for a running material web |
-
2001
- 2001-10-08 FI FI20011953A patent/FI20011953A0/en not_active IP Right Cessation
-
2002
- 2002-10-03 US US10/492,038 patent/US20050008785A1/en not_active Abandoned
- 2002-10-03 DE DE60230063T patent/DE60230063D1/en not_active Expired - Lifetime
- 2002-10-03 EP EP02764905A patent/EP1465738B1/en not_active Expired - Lifetime
- 2002-10-03 CA CA002463160A patent/CA2463160C/en not_active Expired - Fee Related
- 2002-10-03 AT AT02764905T patent/ATE415207T1/en active
- 2002-10-03 JP JP2003534100A patent/JP2005504898A/en active Pending
- 2002-10-03 WO PCT/FI2002/000778 patent/WO2003031080A1/en active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US995327A (en) | 1892-10-31 | 1911-06-13 | Pollard Alling Mfg Company | Folding, wrapping, and addressing machine. |
GB1295536A (en) * | 1970-04-03 | 1972-11-08 | ||
US4455327A (en) * | 1977-03-22 | 1984-06-19 | Fuji Photo Film Co., Ltd. | Dual surface film coating of running web |
US5122386A (en) | 1989-05-01 | 1992-06-16 | Fuji Photo Film Co., Ltd. | Double side coating method |
DE19823740A1 (en) * | 1998-05-08 | 1999-11-11 | Voith Sulzer Papiertech Patent | Coating wet web of paper or cardboard |
FI991498A (en) | 1999-06-30 | 2000-12-31 | Valmet Corp | Method and apparatus for applying treatment substance to moving surface |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004001133A2 (en) * | 2002-06-24 | 2003-12-31 | Voith Paper Patent Gmbh | Device for coating and drying the front and back of a web, particularly one consisting of paper or cardboard |
WO2004001133A3 (en) * | 2002-06-24 | 2004-07-08 | Voith Paper Patent Gmbh | Device for coating and drying the front and back of a web, particularly one consisting of paper or cardboard |
US7563326B2 (en) | 2002-06-24 | 2009-07-21 | Voith Paper Patent Gmbh | Device for coating and drying both sides of a material web of paper or board |
DE10349122A1 (en) * | 2003-10-22 | 2005-05-25 | Voith Paper Patent Gmbh | System for duplex coating of continuous feed material especially paper or card with sequential coating on sloping feeds an with the feed turned over between the coating processes |
EP1538263A1 (en) * | 2003-12-01 | 2005-06-08 | Voith Paper Patent GmbH | Coating device |
CN107159525A (en) * | 2017-07-11 | 2017-09-15 | 佛山市正略信息科技有限公司 | One kind protection film production line double spread wrap-up |
Also Published As
Publication number | Publication date |
---|---|
US20050008785A1 (en) | 2005-01-13 |
DE60230063D1 (en) | 2009-01-08 |
EP1465738B1 (en) | 2008-11-26 |
ATE415207T1 (en) | 2008-12-15 |
EP1465738A1 (en) | 2004-10-13 |
CA2463160A1 (en) | 2003-04-17 |
FI20011953A0 (en) | 2001-10-08 |
JP2005504898A (en) | 2005-02-17 |
CA2463160C (en) | 2009-06-30 |
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