EP4158098A1 - Method and machine for producing a fibrous web which can be elongated in the transverse direction - Google Patents
Method and machine for producing a fibrous web which can be elongated in the transverse directionInfo
- Publication number
- EP4158098A1 EP4158098A1 EP21706541.6A EP21706541A EP4158098A1 EP 4158098 A1 EP4158098 A1 EP 4158098A1 EP 21706541 A EP21706541 A EP 21706541A EP 4158098 A1 EP4158098 A1 EP 4158098A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- elastic band
- fibrous web
- heated cylinder
- web
- transverse direction
- 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
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000011111 cardboard Substances 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 239000011087 paperboard Substances 0.000 claims abstract description 8
- 230000003750 conditioning effect Effects 0.000 claims description 27
- 238000010438 heat treatment Methods 0.000 claims description 21
- 230000003014 reinforcing effect Effects 0.000 claims description 11
- 230000015572 biosynthetic process Effects 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 2
- 238000010792 warming Methods 0.000 claims 1
- 238000001035 drying Methods 0.000 abstract description 5
- 239000000123 paper Substances 0.000 description 4
- 239000002657 fibrous material Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000010893 paper waste Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
- D21F11/14—Making cellulose wadding, filter or blotting paper
-
- 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
- D21H25/04—Physical treatment, e.g. heating, irradiating
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/02—Drying on cylinders
-
- 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
- D21H25/005—Mechanical treatment
Definitions
- the invention relates to a method for producing a fibrous web stretchable in the transverse direction. It also relates to a machine, particularly suitable for carrying out such a method, for producing a fibrous web stretchable in the transverse direction.
- the invention is based on the object of specifying a method and a machine of the type mentioned at the beginning with which the aforementioned disadvantages are eliminated.
- the aim here is in particular that the elasticity or transverse elongation property that results in the transverse direction and the absorption of work by the fibrous web in the transverse direction can be controlled or adjusted or improved in a targeted manner.
- a possibility should be created to counteract the increasingly declining waste paper raw material quality.
- the method according to the invention for producing a fiber web stretchable in the transverse direction, in particular a paper or cardboard web stretchable in the transverse direction is characterized in that the fiber web coming from a pre-dryer section of the production machine in question is brought into contact with a heated, water vapor impermeable and smooth rotating cylinder and brought together with a circumferential elastic band impermeable to water vapor over a predetermined or predeterminable wrap angle between the elastic band and the heated cylinder, that is, the cylinder surface is guided horizontally over the heated cylinder and pressed against it by the elastic band, the elastic band is subjected to a variably adjustable and / or controllable prestress in the transverse direction before it is brought into contact with the fibrous web, and the prestress of the elastic is produced in the transverse direction Band is dismantled again after the formation of a vapor cushion between the fibrous web and the heated cylinder, so that the fibrous web shrinks over the steam cushion on the heated cylinder sliding with the elastic band in the transverse direction, in
- the elasticity or transverse elongation property resulting in the transverse direction and the absorption of work of the fibrous web in the transverse direction can now be controlled, adjusted or improved in a targeted manner.
- the opportunity is created to counteract the increasingly declining waste paper raw material quality.
- the fibrous web coming from the pre-dryer section runs onto the elastic band which is prestressed in the transverse direction.
- the fibrous web can slide over the steam cushion on the heated cylinder and shrink in the transverse direction with the elastic band to produce the micro-crepe.
- a steel cylinder in particular a chrome-coated steel cylinder, is preferably used as the heated cylinder.
- Such a steel cylinder, in particular with a chrome coating, ensures that the fibrous web can slide optimally on it after the vapor cushion has been formed.
- the elastic band is advantageously pretensioned in the transverse direction by at least one variably adjustable tensioning roller arranged within its loop.
- the transverse pre-tensioning which can be variably adjusted via the tensioning roller, the transverse shrinkage resulting after the pre-tensioning has been reduced can be controlled or adjusted accordingly.
- the bias of the elastic band generated in the transverse direction, viewed in the direction of web travel, is reduced again between a variably adjustable tensioning roller located within the loop of the elastic band and a guide roller located within the loop of the elastic band.
- the steam cushion between the fibrous web and the heated cylinder is in an area of from The zone of the heated cylinder, which is wrapped around the fibrous web and the elastic band, is produced, which is formed between the heated cylinder in a press roller arranged within the loop of the elastic band, which is also designed as a variably adjustable tension roller, by means of which the elastic band is pretensioned in the transverse direction will.
- the elastic band can be subjected to the desired pretension in the transverse direction.
- a guide roller holding the elastic band and the fibrous web on the heated cylinder is provided in the rear area of the area around the heated cylinder, so that the Pretensioning of the elastic band generated in the transverse direction already between the press nip provided in the initial area of the zone of the heated cylinder around which the fibrous web and the elastic band wrapped, viewed in the web running direction, and the press nip in the rear region, viewed in the web running direction, of the zone of the wrapped by the fibrous web and the elastic band heated cylinder provided guide roller for generating the transverse shrinkage of the fibrous web is dismantled again.
- the elastic band is removed from the heated cylinder via the guide roller provided in the rear area of the zone of the heated cylinder wrapped by the fibrous web and the elastic band, viewed in the direction of web travel, and the fibrous web is again separated from the elastic band.
- the fibrous web is used together with the pretensioned elastic band to form the vapor cushion between the fibrous web and the heated
- the cylinder is initially guided over the heated cylinder along a conditioning or warming-up zone with the elastic band held pretensioned.
- the steam cushion is thus formed in the area of the conditioning or warming-up zone.
- the elastic belt is fed to the fibrous web brought into contact with the heated cylinder via a variably adjustable tensioning roller that prestresses the fibrous web and a press nip is provided at the end of the conditioning or heating zone to increase the flattening of the fibrous web on the elastic belt.
- the press nip provided together with the elastic band is guided along a shrink zone further over the heated cylinder, along which the pretensioning of the elastic band to produce the transverse shrinkage of the fibrous material Bru is dismantled again.
- the press nip provided at the end of the conditioning or heating zone thus produces good flattening between the fibrous web and the pretensioned elastic band. While the fibrous web now securely adheres to the elastic band, the existing steam cushion continues to ensure full mobility of the fibrous web relative to the heated cylinder.
- the fibrous web together with the elastic band is advantageously fed to a guide roller following the shrinking zone, via which the fibrous web and the elastic band are removed from the heated cylinder and separated from one another.
- the elastic band can be acted upon by a respective guide roller with a basic tension that is lower by a defined amount than the pretension.
- the fibrous web shrunk in the transverse direction is preferably fed to an after-dryer section of the production machine, the transverse shrinkage being fixed there.
- the machine according to the invention which is particularly suitable for performing the method according to the invention, for producing a fiber web stretchable in the transverse direction, in particular a paper or cardboard web stretchable in the transverse direction, is characterized in that it has a heated, steam-impermeable and smooth rotating cylinder and a steam-impermeable circumferential elastic Belt comprises, the fibrous web together with the elastic belt over a predetermined or predeterminable wrap angle between the elastic belt and the heated cylinder lying lying over the heated cylinder and pressed by the elastic belt against this, the elastic belt before being brought into contact with the fibrous web in A variably adjustable and / or controllable prestress can be applied in the transverse direction, and the prestress of the elastic band generated in the transverse direction after the formation of a vapor cushion between the fibrous web and the b heated cylinder is degradable again, so that the fibrous web shrinks over the steam cushion on the heated cylinder sliding with the elastic band in the transverse direction.
- a steel cylinder in particular a chrome-coated steel cylinder, is preferably provided as the heated cylinder.
- the elastic band can expediently be pretensioned in the transverse direction by at least one variably adjustable tensioning roller arranged within its loop.
- transverse pretensioning of the elastic band viewed in the direction of web travel, can be reduced again between a variably adjustable tensioning roller located within the loop of the elastic band and a guide roller located within the loop of the elastic band.
- the steam cushion between the fibrous web and the heated cylinder is in an initial area viewed in the web running direction produced by the fibrous web and the elastic band wrapped in the zone of the heated cylinder provided press nip, which is formed between the heated cylinder and a press roller arranged within the loop of the elastic band, which is also designed as a variably adjustable tension roller, through which the elastic band in the transverse direction can be prestressed.
- a guide roller holding the elastic band and the fibrous web on the heated cylinder is preferably provided in the rear area of the zone of the heated cylinder wrapped by the fibrous web and the elastic band within the loop of the elastic band, viewed in the direction of web travel, so that the bias generated in the transverse direction of the elastic band already between the press nip provided in the area of the heated cylinder wrapped around by the fibrous web and the elastic band in the initial area, viewed in the direction of web travel, and the press nip, viewed in the direction of travel of the web rear area of the area of the heated cylinder, which is wrapped around by the fibrous web and the elastic band, is dismantled again for generating the transverse shrinkage of the fibrous web.
- the elastic band is advantageously removed from the heated cylinder again via the guide roller provided in the rear area of the zone of the heated cylinder wrapped by the fibrous web and the elastic band, viewed in the direction of web travel, and separated again from the elastic band.
- the fibrous web is together with the pretensioned elastic band to form the vapor cushion between the fibrous web and the heated
- the cylinder is initially guided over the heated cylinder along a conditioning or warm-up zone with the elastic band held in a pretensioned manner.
- the elastic belt can be fed to the fibrous web brought into contact with the heated cylinder via a variably adjustable tensioning roller that prestresses the fibrous web, and a press nip is provided at the end of the conditioning or heating zone to increase the adhesion of the fibrous web to the elastic belt.
- the fibrous web together with the elastic belt is fed to a guide roller following the shrinking zone, via which the fibrous web and the elastic belt are removed from the heated cylinder and separated from one another.
- the elastic band can be acted upon by a respective guide roller with a basic tension that is smaller by a defined amount than the pretension.
- the pretensioning of the elastic band can be adjusted by means of clamping heads which are provided on the side of the roller body of a respective tension roller and can be variably adjusted in the transverse machine direction relative to the roller body.
- the elastic band for targeted influencing of the transverse elongation of the fibrous web is provided symmetrically to its central longitudinal axis parallel to the machine running direction with reinforcing threads extending at least essentially in the transverse direction with correspondingly adapted elastic moduli or with a thread layer adapted in particular with regard to its thread density .
- the modulus of elasticity of the reinforcing threads extending in the transverse direction or the scrim of the elastic belt is or is adapted accordingly to compensate for the trough-shaped shrinkage curve that normally occurs in the transverse direction when the fibrous web is dried.
- the elastic band can also be provided with reinforcing threads extending at least substantially in the machine running direction.
- the elastic band expediently consists at least essentially of rubber.
- the elastic band preferably has a hardness in the range of 55 +/- 10 Shore (107 P&J).
- the elastic band has a density in the range from about 1.2 kg / dm 3 to about 1.5 kg / dm 3 .
- the elastic band advantageously has a thickness in the range from approximately 20 mm to approximately 30 mm, it preferably has a thickness of approximately 25 mm.
- the dry content of the fibrous web fed to the heated cylinder is in the range from about 50% to about 65%, and / or the diameter of the heatable cylinder is in the range from about 900 mm to about 1500 mm and / or the surface temperature of the heated cylinder is> 110 ° and in particular is in a range between 110 ° and about 125 °, and / or the conditioning or heating zone extends over about 30 ° and / or the shrink zone extends over about 20 °, and / or the mean line force in the initial area of the fibrous web and the elastic band, viewed in the direction of web travel
- the press nip provided in the wrapped zone of the heated cylinder is a maximum of 50 kN / m, and / or the dwell time of the fibrous web in the initial area of the zone of the heated cylinder wrapped by the fibrous web and the elastic band, viewed in the direction of web travel, is about 0.1 sec, and / or the mean line force in
- FIG. 1 shows a schematic representation of an exemplary embodiment of a machine according to the invention which is particularly suitable for relatively lower machine or web running speeds, preferably for machine or web running speeds ⁇ 1000 m / sec.
- FIG. 2 shows a schematic representation of a further exemplary embodiment of a machine according to the invention, particularly suitable for relatively higher machine or web running speeds, preferably for machine or web running speeds> 1000 m / sec.
- FIG. 3 shows a schematic partial representation of an exemplary tension roller of the machine according to the invention in cross section
- FIG. 4 shows a schematic partial representation of an exemplary guide roll of the machine according to the invention in cross section
- 5 shows a schematic partial illustration of an exemplary embodiment of the elastic band of a machine according to the invention with reinforcing threads extending in the transverse direction and reinforcing threads extending in the longitudinal direction
- FIG. 6 shows an example of the course of the modulus of elasticity of the reinforcing threads provided symmetrically to the central longitudinal axis of the belt according to FIG. 5, each extending in the transverse direction,
- FIG. 7 shows a schematic partial representation of an exemplary embodiment of the elastic band of a machine according to the invention with a scrim
- the trough-like shrinkage curve of the fibrous web which usually results in the transverse direction, and, with the dashed lines, an exemplary schematic course of the tension or elongation behavior of an elastic belt which results in the transverse direction according to FIGS. 5 or 7, and
- FIG. 9 shows a schematic representation of a shrinkage curve or elongation behavior of the finished dried fibrous material or paper or cardboard web, which results in the transverse direction with an elastic band according to FIG. 5 or 7.
- FIG. 1 and 2 each show an exemplary embodiment of a machine 10 according to the invention for producing a fibrous web 12 which can be stretched in the transverse direction and which can in particular be a paper or cardboard web which can be stretched in the transverse direction.
- the machines 10 each include a heated, water vapor-impermeable and smooth rotating cylinder 14 and a water-vapor-impermeable circumferential elastic band 16.
- the fibrous web 12 is guided over the heated cylinder 14 together with the elastic band 16 over a predetermined or predeterminable wrap angle between the elastic band 16 and the heated cylinder 14 and is pressed against the latter by the elastic band 16.
- the elastic band 16 Before it is brought into contact with the fibrous web 12, the elastic band 16 can be acted upon with a variably adjustable and / or controllable pretension in the transverse direction.
- the pre-tensioning of the elastic band 16 generated in the transverse direction can be broken down again after the formation of a steam cushion between the fibrous web 12 and the heated cylinder 14, so that the fibrous web 12, sliding over the steam cushion on the heated cylinder 14, shrinks in the transverse direction with the elastic band.
- the steam cushion between the fibrous web 12 and the heated cylinder 14 is in a direction I in the web
- the initial area of the zone of the heated cylinder 14 wrapped around by the fibrous web 12 and the elastic band 16 is generated, which is formed between the heated cylinder 14 and a press roller 20 arranged within the loop of the elastic band 16, which is simultaneously adjustable as a variable Tensioning roller is designed, by means of which the elastic band 16 can be prestressed in the transverse direction.
- a guide roller 22 holding the elastic band 16 and the fibrous web 12 on the heated cylinder 14 is provided within the loop of the elastic band 16, see above that the pre-tensioning of the elastic band 16 generated in the transverse direction is already between the press nip 18 provided in the initial area of the zone of the heated cylinder 14 around which the fibrous web 12 and the elastic band 16, viewed in the direction of web travel I, are wrapped, and the rear area of from of the fibrous web 12 and the elastic band 16 wrapped around the zone of the heated cylinder 14 provided guide roller 22 for generating the transverse shrinkage of the fibrous web 12 is broken down again.
- the elastic band 16 is removed again from the heated cylinder 14 via the guide roller 22 provided in the rear area of the zone of the heated cylinder 14 wrapped by the fibrous web 12 and the elastic band 16, viewed in the direction of web travel I, and is again separated from the elastic band 16.
- the elastic band 16 is fed to the fibrous web 12 brought into contact with the heated cylinder 14 via a variably adjustable tensioning roller 24 pretensioning the fibrous web 12.
- a press nip 26 is provided, which is formed between the heated cylinder 14 and a press roller 28 arranged within the loop of the elastic band 16 and which is used to maintain the pretension of the elastic band 16 within the preceding conditioning or heating zone a is again designed as a variably adjustable tensioning roller.
- the fibrous web 12 is guided along with the elastic band 16 along a shrink zone ß further over the heated cylinder 14, along which the pretensioning of the elastic band 16 to produce the transverse Shrinkage of the fibrous web 12 is degradable again.
- the fibrous web 12 is fed together with the elastic belt 16 to a guide roller 30, via which the fibrous web 12 and the elastic belt 16 are removed from the heated cylinder 14 and separated from one another.
- a respective guide roller 22, 30 can act on the elastic band 16 with a basic tension that is smaller than the pretension by a defined amount.
- FIG. 3 shows a schematic partial representation of an exemplary embodiment of a tensioning roller A, as is possible, for example, for the roller 20 according to FIG. 1, which is also configured as a press roller, the tensioning roller 24 and the press roller 28, which is also again simultaneously configured as a tensioning roller, according to FIG. 2.
- the pretensioning of the elastic band 16 is on the side of the roller body 32 provided, in the transverse direction of the machine relative to the roller body 32 variably adjustable clamping heads 34 adjustable.
- FIG. 4 shows, in a schematic partial representation, an exemplary embodiment of a guide roller B, as is conceivable, for example, for the guide roller 22 according to FIG. 1 and the guide roller 30 according to FIG. 2.
- the elastic band 16 can be subjected to a basic tension which is smaller than the pretension by a defined amount AL.
- Fig. 5 shows a schematic partial representation of an exemplary embodiment of the elastic band 16 of a machine according to the invention with reinforcing threads 38 extending in the transverse direction CD and reinforcing threads 40 extending in the longitudinal direction MD targeted influencing of the transverse elongation of the fibrous web 12 with correspondingly adapted moduli of elasticity E.
- the modulus of elasticity E of the reinforcing threads 38 of the elastic band 16 extending in the transverse direction CD can be adapted accordingly, in particular to compensate for the trough-shaped shrinkage curve 42 that normally occurs in the transverse direction during the drying of the fibrous web 12 (see the solid line in FIG. 8).
- FIG. 7 shows a schematic partial representation of an exemplary embodiment of the elastic band 16 of a machine 10 according to the invention with a scrim 44 in which the desired profiling for targeted influencing of the transverse expansion of the fibrous web can be achieved via a variable thread density.
- the thread density is high, in the middle it is in the middle area, and in the right part of FIG. 7 the thread density is relatively low.
- Such a scrim 44 can again be adapted accordingly to compensate for the trough-shaped shrinkage curve 42 which normally occurs in the transverse direction during the drying of the fibrous web 12, which in the present case is possible in particular via a variable thread density.
- FIG. 8 shows with the continuous line the schematic course of the trough-shaped shrinkage curve 42 of the fibrous web 12 which usually results in the transverse direction CD Tension or elongation behavior of an elastic band according to FIGS. 5 and 7 is shown.
- the course of the transverse stretch e of a conventionally dried fibrous web 12 cf. the solid line 42
- the course of the transverse stretch e of an elastic band 16 according to FIGS. 5 and 7 (dashed line 46) are shown.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020114602.7A DE102020114602A1 (en) | 2020-06-02 | 2020-06-02 | PROCESS AND MACHINE FOR MANUFACTURING CROSS-DIRECTIONAL EXTENSIBLE FIBER WEB |
PCT/EP2021/053810 WO2021244780A1 (en) | 2020-06-02 | 2021-02-17 | Method and machine for producing a fibrous web which can be elongated in the transverse direction |
Publications (3)
Publication Number | Publication Date |
---|---|
EP4158098A1 true EP4158098A1 (en) | 2023-04-05 |
EP4158098C0 EP4158098C0 (en) | 2024-04-10 |
EP4158098B1 EP4158098B1 (en) | 2024-04-10 |
Family
ID=74668842
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21706541.6A Active EP4158098B1 (en) | 2020-06-02 | 2021-02-17 | Method and machine for producing a fibrous web which can be elongated in the transverse direction |
Country Status (5)
Country | Link |
---|---|
US (1) | US20230103146A1 (en) |
EP (1) | EP4158098B1 (en) |
CN (1) | CN115698424A (en) |
DE (1) | DE102020114602A1 (en) |
WO (1) | WO2021244780A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102021118165B4 (en) | 2021-07-14 | 2023-06-29 | Voith Patent Gmbh | roller arrangement |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL235288A (en) | 1958-01-20 | |||
US3148108A (en) * | 1962-10-29 | 1964-09-08 | Clupak Inc | Extensible non-combustible paper |
US6146499A (en) * | 1997-12-22 | 2000-11-14 | Kimberly-Clark Worldwide, Inc. | Method for increasing cross machine direction stretchability |
IT1400457B1 (en) * | 2010-06-01 | 2013-05-31 | Trani | METHOD OF REALIZATION OF STRETCHES OF FIBROUS MATERIAL EXTENSIBLE TRANSVERSALLY, IN PARTICULAR OF PAPER RIBBONS, AND EQUIPMENT TO CARRY OUT THE METHOD. |
DE102010029552A1 (en) | 2010-06-01 | 2011-12-01 | Voith Patent Gmbh | Belt arrangement and method of treating a paper web in a calendering arrangement |
ITVE20110071A1 (en) | 2011-10-27 | 2013-04-28 | Giorgio Trani | METHOD TO MODIFY THE PHYSICAL AND / OR CHEMICAL CHARACTERISTICS OF A FIBER RIBBON AND EQUIPMENT TO IMPLEMENT THE METHOD. |
EP3211135B1 (en) | 2016-02-29 | 2018-08-29 | BillerudKorsnäs AB | High-stretch sackpaper |
-
2020
- 2020-06-02 DE DE102020114602.7A patent/DE102020114602A1/en not_active Ceased
-
2021
- 2021-02-17 WO PCT/EP2021/053810 patent/WO2021244780A1/en unknown
- 2021-02-17 CN CN202180039696.7A patent/CN115698424A/en active Pending
- 2021-02-17 EP EP21706541.6A patent/EP4158098B1/en active Active
-
2022
- 2022-12-02 US US18/073,684 patent/US20230103146A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
EP4158098C0 (en) | 2024-04-10 |
WO2021244780A1 (en) | 2021-12-09 |
EP4158098B1 (en) | 2024-04-10 |
CN115698424A (en) | 2023-02-03 |
DE102020114602A1 (en) | 2021-12-02 |
US20230103146A1 (en) | 2023-03-30 |
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