GB2119418A - Dry paper machine - Google Patents
Dry paper machine Download PDFInfo
- Publication number
- GB2119418A GB2119418A GB08311057A GB8311057A GB2119418A GB 2119418 A GB2119418 A GB 2119418A GB 08311057 A GB08311057 A GB 08311057A GB 8311057 A GB8311057 A GB 8311057A GB 2119418 A GB2119418 A GB 2119418A
- Authority
- GB
- United Kingdom
- Prior art keywords
- web
- drying
- underside
- aid
- bonding agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000001035 drying Methods 0.000 claims abstract description 22
- 239000007767 bonding agent Substances 0.000 claims abstract description 13
- 238000003490 calendering Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 11
- 230000000379 polymerizing effect Effects 0.000 claims abstract description 10
- 239000000835 fiber Substances 0.000 claims abstract description 7
- 238000004049 embossing Methods 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
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
- D21H5/00—Special paper or cardboard not otherwise provided for
- D21H5/26—Special paper or cardboard manufactured by dry method; Apparatus or processes for forming webs by dry method from mainly short-fibre or particle material, e.g. paper pulp
- D21H5/265—Treatment of the formed web
-
- 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
- D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
Landscapes
- Paper (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
- Luminescent Compositions (AREA)
Abstract
In a dry paper machine, in the step following the forming section, the fiber web has been conducted with the aid of topside and/or underside wires through the machine to the purpose of adding, drying and polymerizing the bonding agent. The unbonded fiber web has low strength and requires careful handling so that it might not break and cause process shut-downs. This circumstance has in modern paper machines resulted in a running speed which is low compared with the theoretical capacity of the machines. It has been found that web breaks tend to occur at the so-called open draws of its carry-through path, where the fiber web is not supported and is allowed to hang free in the air or carried by a wire (2, 3, 9). The object of the invention is to avoid open draws and to convey the web (1) in supported fashion through the entire process. The reliability of the procedure is improved by placing the mechanically drying calendering to be the last treatment step before polymerizing.
Description
SPECIFICATION
Dry paper machine
The present invention concerns a dry paper machine wherein in the step after the forming section the fibre web has been conducted with the aid of topside and/or underside wires through the machine to the purpose of adding, drying and polymerizing the bonding agent.
When the uncured web is being handled and transported, care must be exercised because of its low strength. This is particularly important in paper machines, where shut-downs are costly. In modern dry paper machines, the path of the web has so-called open draws where the web is not supported at all. At these points tensions build up in the web, and it breaks unless the web is run at low speed. As a consequence, present-day dry paper machines have poor efficiency because one has been forced to strike a compromise between the breaking tendency of the web and the throughput rate of the machine.
The object of the present invention is to eliminate the drawbacks mentioned above. In order to achieve this effect, the invention is characterized in that the topside and underside wires are disposed to overlap so that the web runs in a state of rest and without open draws causing tensions, through the entire process.
The invention is further characterized in that the fully bonded web is subjected to hot calendering after the drying process.
Moreover, the invention is characterized in that the partly bonded web is subjected to hot calendering after the drying process. By this arrangement the advantage is gained that the absorption of the bonding agent in the second step takes place efficiently, owing to the pressing preceding the spraying.
The invention is described in the following with the aid of an example with reference made to the attached drawing, wherein
Fig. 1 presents a paper machine according to the invention; and
Fig. 2 presents another embodiment of the invention.
In the paper machine of Fig. 1, the web 1 is transferred from the forming wire 2 to the underside of the first drying wire 3 with the aid of the suction box 4. The bonding agent 5 is thereafter sprayed on the web from below. It is possible, instead of bonding agent spraying, also to use compounds added at the web-forming step (hot-bonding resins or equivalent). The web is further carried, supported by a topside vacuum (suction box 7) through the first drying section 8.
The web is picked up into the embossing calender 14 with the aid of a smooth roll, possibly making use of water or steam, from the underside of the drying wire 3 and carried through the embossing calender nip.
The web is therefore transferred from the embossing calender 14 to the next wire 9 with the aid of the suction box 1 0. Finally, the web is carried in support of the wire 9 through the second bonding agent spraying 12, the drying section 8 and the polymerizing section 13.
In the arrangement depicted in Fig. 2, calendering is not carried out until after polymerizing, when the web is strong and durable.
It is obvious to a person skilled in the art that the invention is not confined to the example presented above and may instead be applied within the scope of the claims following below.
1. Dry paper machine wherein in the step after the forming section the fibre web has been conducted with the aid of topside and underside wires through the machine for adding, drying and polymerizing the bonding agent, characterized in that the topside and underside wires (3, 9) are disposed to overlap so that the web (1) runs in a state of rest without open draws causing tensions, through the entire process.
2. Procedure according to claim 1, characterized in that the fully bonded web (1) is subjected to hot calendering after the drying process.
3. Procedure according to claim 1, characterized in that the partly bonded web is subjected to hot calendering after the drying process.
4. Dry paper machine substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (4)
1. Dry paper machine wherein in the step after the forming section the fibre web has been conducted with the aid of topside and underside wires through the machine for adding, drying and polymerizing the bonding agent, characterized in that the topside and underside wires (3, 9) are disposed to overlap so that the web (1) runs in a state of rest without open draws causing tensions, through the entire process.
2. Procedure according to claim 1, characterized in that the fully bonded web (1) is subjected to hot calendering after the drying process.
3. Procedure according to claim 1, characterized in that the partly bonded web is subjected to hot calendering after the drying process.
4. Dry paper machine substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI821413A FI68284B (en) | 1982-04-23 | 1982-04-23 | TORRPAPPERSMASKIN |
Publications (3)
Publication Number | Publication Date |
---|---|
GB8311057D0 GB8311057D0 (en) | 1983-05-25 |
GB2119418A true GB2119418A (en) | 1983-11-16 |
GB2119418B GB2119418B (en) | 1985-10-02 |
Family
ID=8515405
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08311057A Expired GB2119418B (en) | 1982-04-23 | 1983-04-22 | Dry paper machine |
Country Status (6)
Country | Link |
---|---|
AU (1) | AU557619B2 (en) |
DE (1) | DE3342787T1 (en) |
FI (1) | FI68284B (en) |
GB (1) | GB2119418B (en) |
SE (1) | SE460127B (en) |
WO (1) | WO1983003858A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1985003962A1 (en) * | 1984-02-28 | 1985-09-12 | Scan-Web I/S V. H. Kongsted Og J. Mosgaard Christe | A method and an apparatus for embossing a dry laid fibre web, e.g. for kitchen roll paper |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4476078A (en) * | 1982-05-04 | 1984-10-09 | James River-Dixie/Northern, Inc. | Process for manufacturing embossed nonwoven fibrous products |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1060113A (en) * | 1963-05-22 | 1967-02-22 | Kimberly Clark Co | Papermaking machine |
GB1113792A (en) * | 1964-04-17 | 1968-05-15 | Bunzl & Biach Ag | A process for the production of composite material |
GB1249053A (en) * | 1968-02-28 | 1971-10-06 | Vepa Ag | Process and device for the production of continuous random webs |
GB1445295A (en) * | 1973-04-30 | 1976-08-11 | Scott Paper Co | Fibrous sheet material and method for producing such material |
GB1522465A (en) * | 1976-02-20 | 1978-08-23 | Cyrenne R | Paper machine draw roll |
GB1549489A (en) * | 1976-07-05 | 1979-08-08 | Valmet Oy | Method of and means for supporting a paper web passing to and through a paper-making-machine drying initial section |
GB1564484A (en) * | 1976-11-30 | 1980-04-10 | Valmet Oy | Method of and means for conveying and treating a web at the wet end of a paper-making machine |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3030245A (en) * | 1959-03-23 | 1962-04-17 | Kimberly Clark Co | Apparatus and method for the manufacture of cellulosic products |
DE1653299B1 (en) * | 1967-03-14 | 1971-03-04 | Siempelkamp Gmbh & Co | Transfer device for the transport of good mats for the production of chipboard, fiberboard or the like. |
US3577290A (en) * | 1968-08-19 | 1971-05-04 | Procter & Gamble | Process of making a nonwoven fabric |
US3616035A (en) * | 1968-12-26 | 1971-10-26 | Procter & Gamble | Method of continuously making a uniform nonwoven fabric |
-
1982
- 1982-04-23 FI FI821413A patent/FI68284B/en not_active Application Discontinuation
-
1983
- 1983-04-22 SE SE8302277A patent/SE460127B/en not_active IP Right Cessation
- 1983-04-22 GB GB08311057A patent/GB2119418B/en not_active Expired
- 1983-04-25 AU AU15125/83A patent/AU557619B2/en not_active Ceased
- 1983-04-25 DE DE19833342787 patent/DE3342787T1/en not_active Ceased
- 1983-04-25 WO PCT/FI1983/000034 patent/WO1983003858A1/en active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1060113A (en) * | 1963-05-22 | 1967-02-22 | Kimberly Clark Co | Papermaking machine |
GB1113792A (en) * | 1964-04-17 | 1968-05-15 | Bunzl & Biach Ag | A process for the production of composite material |
GB1249053A (en) * | 1968-02-28 | 1971-10-06 | Vepa Ag | Process and device for the production of continuous random webs |
GB1445295A (en) * | 1973-04-30 | 1976-08-11 | Scott Paper Co | Fibrous sheet material and method for producing such material |
GB1522465A (en) * | 1976-02-20 | 1978-08-23 | Cyrenne R | Paper machine draw roll |
GB1549489A (en) * | 1976-07-05 | 1979-08-08 | Valmet Oy | Method of and means for supporting a paper web passing to and through a paper-making-machine drying initial section |
GB1564484A (en) * | 1976-11-30 | 1980-04-10 | Valmet Oy | Method of and means for conveying and treating a web at the wet end of a paper-making machine |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1985003962A1 (en) * | 1984-02-28 | 1985-09-12 | Scan-Web I/S V. H. Kongsted Og J. Mosgaard Christe | A method and an apparatus for embossing a dry laid fibre web, e.g. for kitchen roll paper |
Also Published As
Publication number | Publication date |
---|---|
FI68284B (en) | 1985-04-30 |
DE3342787T1 (en) | 1985-02-21 |
SE460127B (en) | 1989-09-11 |
WO1983003858A1 (en) | 1983-11-10 |
GB2119418B (en) | 1985-10-02 |
FI821413A0 (en) | 1982-04-23 |
AU1512583A (en) | 1983-11-21 |
AU557619B2 (en) | 1986-12-24 |
FI821413L (en) | 1983-10-24 |
SE8302277L (en) | 1983-10-24 |
GB8311057D0 (en) | 1983-05-25 |
SE8302277D0 (en) | 1983-04-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0345266B1 (en) | Apparatus for drying a web | |
JPH0343397B2 (en) | ||
US3810818A (en) | Twin-wire papermaking machine with suction boxes within the loop of one wire and blast boxes within the other | |
US4257844A (en) | Press section arrangement | |
US3565757A (en) | Apparatus for forming and dewatering a fibrous web | |
ES8205283A1 (en) | Procedure in the wire section of a paper machine, and twin-wire former applying the procedure. | |
US4197158A (en) | Paper making machine press section | |
US5820731A (en) | Method and apparatus in a paper or board machine for dewatering the web | |
US4209361A (en) | Method of multi-nip pressing in a paper machine | |
GB2119418A (en) | Dry paper machine | |
CA1089271A (en) | Procedure for manufacturing paper, cardboard or another equivalent fibre web possessing stretchability and/or high friction coefficient | |
EP0519920B1 (en) | Couch press transfer apparatus and method | |
US2732772A (en) | Hornbostel | |
US3023805A (en) | Transfer press | |
US6493962B2 (en) | Drying section | |
US4081320A (en) | Method and apparatus for separating a fibrous web from a foraminous belt | |
US4188262A (en) | Method for dewatering paper in a paper machine press section | |
US2618205A (en) | Papermaking machine | |
US3529755A (en) | Method and a device for threading | |
US4008122A (en) | Paper making machine with facing felt and forming wire | |
US6436239B2 (en) | Method to reduce the adhesion of a damp fibrous material web to a rotating roll | |
US2005929A (en) | Paper making apparatus and process | |
US7357847B2 (en) | Device for drying a paper web | |
US7192507B2 (en) | Machine for producing a fibrous material web | |
US3851407A (en) | Drying apparatus for a wrinkled paper web |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |