US20170037579A1 - A sheet of absorbent material, roll, log and method for manufacturing the same - Google Patents

A sheet of absorbent material, roll, log and method for manufacturing the same Download PDF

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Publication number
US20170037579A1
US20170037579A1 US15/303,110 US201415303110A US2017037579A1 US 20170037579 A1 US20170037579 A1 US 20170037579A1 US 201415303110 A US201415303110 A US 201415303110A US 2017037579 A1 US2017037579 A1 US 2017037579A1
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US
United States
Prior art keywords
sheet
log
absorbent material
unperforated
base sheet
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.)
Abandoned
Application number
US15/303,110
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English (en)
Inventor
Julien Marietta-Tondin
Gilles Cattacin
Donald Barredo
Rémy Ruppel
René SIGWALT
Pierre Laurent
Denis GENET
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Essity Operations France SAS
Original Assignee
SCA Tissue France SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SCA Tissue France SAS filed Critical SCA Tissue France SAS
Assigned to SCA TISSUE FRANCE reassignment SCA TISSUE FRANCE ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LAURENT, PIERRE, GENET, Denis, SIGWALT, RENE, BARREDO, DONALD, CATTACHIN, GILLES, MARIETTA-TONDIN, JULIEN, RUPPEL, REMY
Assigned to SCA TISSUE FRANCE reassignment SCA TISSUE FRANCE CORRECTIVE ASSIGNMENT TO CORRECT THE SPELLING OF THE SECOND-LISTED INVENTOR'S SURNAME FROM Assignors: LAURENT, PIERRE, GENET, Denis, SIGWALT, RENE, BARREDO, DONALD, CATTACIN, GILLES, MARIETTA-TONDIN, JULIEN, RUPPEL, REMY
Publication of US20170037579A1 publication Critical patent/US20170037579A1/en
Abandoned legal-status Critical Current

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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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/002—Tissue paper; Absorbent paper
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K10/00—Body-drying implements; Toilet paper; Holders therefor
    • A47K10/16—Paper towels; Toilet paper; Holders therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/18—Perforating by slitting, i.e. forming cuts closed at their ends without removal of material
    • B26F1/20—Perforating by slitting, i.e. forming cuts closed at their ends without removal of material with tools carried by a rotating drum or similar support
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
    • B65H35/04—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with transverse cutters or perforators
    • B65H35/08—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with transverse cutters or perforators from or with revolving, e.g. cylinder, cutters or perforators
    • 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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/002—Tissue paper; Absorbent paper
    • D21H27/004—Tissue paper; Absorbent paper characterised by specific parameters
    • D21H27/005—Tissue paper; Absorbent paper characterised by specific parameters relating to physical or mechanical properties, e.g. tensile strength, stretch, softness
    • 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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/02—Patterned paper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/414—Winding
    • B65H2301/4148—Winding slitting
    • B65H2301/41484—Winding slitting slitting roll after winding, i.e. cutting log into individual rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/515—Cutting handled material
    • B65H2301/5152—Cutting partially, e.g. perforating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/515—Cutting handled material
    • B65H2301/5153—Details of cutting means
    • B65H2301/51532—Blade cutter, e.g. single blade cutter
    • B65H2301/515323—Blade cutter, e.g. single blade cutter rotary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/515—Cutting handled material
    • B65H2301/5153—Details of cutting means
    • B65H2301/51532—Blade cutter, e.g. single blade cutter
    • B65H2301/515326—Multiple blade cutter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/19—Specific article or web
    • B65H2701/1924—Napkins or tissues, e.g. dressings, toweling, serviettes, kitchen paper and compresses

Definitions

  • An aspect relates to a sheet of absorbent material and sheet of absorbent material wound as a roll. Another aspect relates to a log base sheet made of absorbent material used to manufacture such rolls. Still another aspect relates to a method for manufacturing a roll of sheet of absorbent material.
  • the sheet of absorbent material may be manufactured from a web of tissue paper (obtained by a Conventional Wet Press or Through Air Drying manufacturing method or other manufacturing method) or a nonwoven fabric (obtained by an air-laid manufacturing method or spun-laid manufacturing method or other manufacturing method).
  • tissue paper obtained by a Conventional Wet Press or Through Air Drying manufacturing method or other manufacturing method
  • a nonwoven fabric obtained by an air-laid manufacturing method or spun-laid manufacturing method or other manufacturing method.
  • Such absorbent sheet products find a particular, though non-exclusive, use as sanitary or domestic purposes.
  • such absorbent sheet products may be used as paper towel, toilet tissue, bathroom tissue, facial tissue, wiping tissue, kitchen tissue, etc.
  • a tissue paper relates to an absorbent paper based on cellulose fibers which is also called tissue paper base-sheet in this field of technology.
  • a typical absorbent paper has a low basis weight, in the range from 10 to 50 g/m2.
  • a nonwoven fabric comprising cellulosic fibers relates to an absorbent paper which is also called nonwoven or web made of fibers like air-laid web in this field of technology.
  • a typical absorbent paper has a basis weight, in the range from 30 to 250 g/m2, preferably 40 to 200 g/m2.
  • FIG. 1 schematically illustrates a method for manufacturing a roll of absorbent sheet material 4 according to the prior art. More precisely, at the stage of FIG. 1 , an absorbent base sheet 1 has already been produced according to a known papermaking process. FIG. 1 illustrates a later stage which is a stage where a converting process takes place. The converting process converts large parent base sheet 1 (e.g., strip width from 1.80 m to 7 m) into retail sized rolls 4 , e.g., bathroom tissue rolls, paper towels rolls e.g., strip width from 8 to 40 cm). More precisely, the base sheet 1 is fed into a space of a perforating unit 10 comprising a perforator roll and a stationary anvil roll.
  • a perforating unit 10 comprising a perforator roll and a stationary anvil roll.
  • a tear line 5 is a line according to a cross-machine direction CD made in the thickness of the base sheet 1 and comprising alternating perforated segments and unperforated segments (i.e. two perforated segments being separated by one unperforated segment or vice-versa).
  • Each unperforated segment forms an attachment area between two consecutive portions (according to the machine direction MD) of the base sheet.
  • Each perforated segment forms a detachment area between two consecutive portions (according to the machine direction MD) of the base sheet.
  • Two consecutive tear lines 5 define the individual sheet length L in the rolls of absorbent material sheet 4 , e.g., typically a sheet of a bathroom tissue rolls may have a length of around 33 cm.
  • multiple phantom lines 20 - 27 parallel to the machine direction MD are also represented on the base sheet 1 for the sole purpose of illustration.
  • the phantom lines 20 - 27 are spaced apart in the cross-machine direction CD. They schematically represent imaginary lines where the base sheet 1 will be cut into multiple and individual rolls of absorbent material sheet 4 . The distance between two consecutive phantom lines is equal to the full width of the individual rolls 4 .
  • the perforated base sheet 1 is wound (step S 2 ) onto a core 3 in order to form a wound log 2 by means of a rewinding unit 11 .
  • a rewinding unit 11 Various types of rewinding unit are commonly used in the tissue industry, for example center rewinders or surface rewinders.
  • the produced log 2 is then cut (step S 4 ) by multiple log saws 40 - 47 into multiple and individual rolls of absorbent material sheet 4 .
  • the corresponding cuts in the produced log 2 are represented by multiple phantom lines 30 - 37 on the surface of the produced log 2 .
  • the mass production throughput constraints imply a typical speed and tension of the converting process.
  • the speed may be set at 650 m/min.
  • the tension in the parent base sheet required to wound the roll may exceed the tensile strength of the tear lines.
  • increasing the tensile strength of the tear lines may result in rolls that are not satisfactory for the user or not adapted to the dispenser. Indeed, they would require applying an unacceptable pulling force in order to properly detach the individual sheets from the roll along the tear lines.
  • the document U.S. Pat. No. 6,010,090 relates to a method of perforating a web.
  • An elongated web of paper is perforated along a plurality of transverse lines to provide bands of web areas having relatively high tensile strength which extend generally longitudinally along the web.
  • the lines of perforation can be formed by staggered perforation lines which contain groups of perforations which are separated by unperforated areas or by staggered perforation lines which include groups of perforations having relatively low tensile strength which are separated by groups of perforations having relatively high tensile strength.
  • a sheet of absorbent material having opposite sheet side edges spaced apart from one another to define an overall width of the sheet of absorbent material, the sheet of absorbent material comprising zones of weakness spaced along the sheet of absorbent material according to a machine direction, each zone of weakness extending substantially transversally to said machine direction, each zone of weakness defining two adjacent individual absorbent sheet portions, each zone of weakness being a tear line,
  • a width ratio of the edge regions relatively to the central region may range from about 4% to about 20%.
  • An edge region width may range from about 3 mm to about 10 mm.
  • the central region may comprise alternating perforated segments and unperforated segments according to a perforation pattern comprising at least two perforated segments separated by one unperforated segment, each segment having substantially an identical width.
  • the central region may comprise alternating perforated segments and unperforated segments according to a perforation pattern comprising multiple perforated segments, two adjacent perforated segments being separated by one unperforated segment, each perforated segment having a width increasing from one side edge towards the opposite side edge, each unperforated segment having a constant width.
  • the central region may comprise alternating perforated segments and unperforated segments according to a perforation pattern comprising multiple perforated segments, two adjacent perforated segments being separated by one unperforated segment, each unperforated segment having a width increasing from one side edge towards the opposite side edge, each perforated segment having a constant width.
  • a roll of absorbent material sheet comprising a sheet of absorbent material according to an embodiment of the invention wound onto a core or on itself.
  • the sheet of absorbent material for manufacturing absorbent sheet products chosen among the group comprising napkins, towels, kitchen towels, hand towels, toilet papers, wipes and facial tissues.
  • a log base sheet made of absorbent material having opposite log side edges spaced apart from one another to define an overall width of the log base sheet, the log base sheet comprising zones of weakness spaced along the log base sheet according to a machine direction MD of the log base sheet, each zone of weakness extending substantially transversally to said machine direction, each zone of weakness being a tear line, the log base sheet comprising multiple phantom lines parallel to the machine direction representing imaginary lines for cutting the log base sheet,
  • a central region out of two in each tear line may be replaced by an unperforated region, and wherein two consecutive tear lines are staggered according to a cross-machine direction CD such that all the central region are positioned between two adjacent phantom lines.
  • a log of absorbent material sheet comprising a log base sheet made of absorbent material according to an embodiment of the invention wound onto a core or on itself.
  • a method for manufacturing a roll of sheet of absorbent material comprising the steps of:
  • a central region out of two in a tear line may be replaced by an unperforated region, and wherein two consecutive tear lines are staggered according to a cross-machine direction CD such that all the central region are positioned between two adjacent phantom lines.
  • FIG. 1 schematically illustrates a method for manufacturing a roll of sheet of absorbent material according to the prior art
  • FIG. 2 schematically and partially illustrates a method for manufacturing a log of sheet of absorbent material according to a first exemplary embodiment of the invention
  • FIG. 3 schematically and partially illustrates a method for manufacturing a log of sheet of absorbent material according to a second exemplary embodiment of the invention
  • FIG. 4 is a perspective view schematically illustrating a roll of sheet of absorbent material manufactured according to the first or second embodiment
  • FIGS. 5 and 6 are perspective views schematically illustrating a perforating unit for the first and second exemplary embodiment, respectively.
  • FIGS. 7 to 11 schematically illustrate various perforating patterns (top part) and corresponding knife (bottom part) for the perforating unit illustrated in FIGS. 5 and 6 .
  • FIG. 2 schematically and partially illustrates the method for manufacturing a log of sheet of absorbent material according to a first exemplary embodiment of the invention. More precisely, FIG. 2 schematically and partially shows a converting operation taking place after a base sheet 1 has been produced by a paper making machine. At this stage, the base sheet 1 is fed into a converting line.
  • FIG. 2 multiple phantom lines 20 - 27 parallel to the machine direction MD are also represented on the base sheet 1 for the sole purpose of illustration.
  • the phantom lines 20 - 27 are spaced apart in the cross-machine direction CD.
  • Each phantom line schematically represents an imaginary line where the base sheet 1 will be cut at the end of the converting process in order to form a plurality of individual rolls of sheet of absorbent material.
  • two adjacent phantom lines define the future edges of the individual roll. The distance between two consecutive phantom lines is equal to the full width of the individual roll.
  • the base sheet 1 is fed into the space of the perforating unit 10 , namely between a perforator roll 11 and an anvil roll 12 of the perforating unit 10 .
  • the perforating unit 10 will be described in details in relation with FIGS. 5 and 6 .
  • the base sheet 1 is pinched (step S 1 ) with the tear lines 50 (schematically represented by dotted lines).
  • the tear line 50 is a line according to a cross-machine direction CD (i.e. transversally to the machine direction MD) made in the thickness of the base sheet 1 that constitutes a zone of weakness.
  • the tear line 50 comprises two edge regions 56 and a central region 55 .
  • a first edge region begins at one of the sheet side edges towards the central region 55 .
  • a second edge region begins at the other sheet side edges towards the central region 55 .
  • the central region 55 comprises alternating perforated segments and unperforated segments.
  • the two edge regions 56 are short unperforated segments.
  • the central region 55 comprises alternating perforation segments having a particular perforating pattern.
  • the perforating pattern of the perforation segments 55 will be described in details in relation with FIGS. 7 to 11 .
  • the short unperforated segments of the two edge regions 56 are crossed substantially in the middle by a corresponding phantom line 20 - 27 or, in other word, each phantom line 20 - 27 is positioned at a boundary between two adjacent edge regions 56 .
  • Each perforation segment 55 is positioned in the middle of the full width defined by two adjacent phantom lines (e.g., 21 and 22 ), more precisely at a distance a from both phantom lines that defines the future edges of the individual roll.
  • the length of the short unperforated segments 56 in the cross direction CD is noted 2 ⁇ .
  • the length of the perforation segments 55 in the cross direction CD is noted ⁇ .
  • Two consecutive tear lines 50 define the individual sheet length L in the rolls 4 (e.g., a length around 33 cm).
  • the short unperforated segments 56 of length 2 ⁇ form attachment areas within the tear line 50 according to the cross-machine direction CD of the base sheet.
  • the short unperforated segments form a plurality of attachment areas between two consecutive portions according to the machine direction MD of the base sheet.
  • the resulting tensile strength of the tear lines 50 is significantly improved. This avoids, at least considerably reduces, the blowouts in the base sheet during production. Indeed, breaks in the base sheet cannot propagate, at least with difficulty, along the tear line 50 .
  • the length 2 ⁇ may be chosen around or superior to 8 mm (i.e. ⁇ 4 mm).
  • the perforated base sheet 1 is wound (step S 2 ) onto a core 3 (or alternatively on itself for coreless log) in order to form a wound log 2 by means of the rewinding unit 11 .
  • step S 2 the perforated base sheet 1 is wound onto a core 3 (or alternatively on itself for coreless log) in order to form a wound log 2 by means of the rewinding unit 11 .
  • FIG. 3 schematically and partially illustrates the method for manufacturing a log of sheet of absorbent material according to a second exemplary embodiment of the invention.
  • the second exemplary embodiment differs from the first exemplary embodiment in that the base sheet 1 is pinched (step S 1 ) with staggered tear lines 51 and 52 (schematically represented by dotted lines).
  • staggered tear lines 51 and 52 (schematically represented by dotted lines).
  • One central region out of two in each tear line is replaced by an unperforated region, and two consecutive tear lines are staggered according to a cross-machine direction CD such that all the central region are positioned between two adjacent phantom lines.
  • first tear line 51 adjacent to a second tear line 52
  • first tear line 51 being staggered or offset according to the CD direction relatively to the second tear line 52
  • tear line 51 or 52 comprises alternating perforation segments 55 having a particular perforating pattern and long unperforated segments 56 (corresponding to two edge regions and one unperforated central region).
  • the perforating pattern of the perforation segments 55 will be described in details in relation with FIGS. 7 to 11 .
  • Two consecutive tear lines 51 or 52 define the individual sheet length L in the rolls of sheet of absorbent material 4 (e.g., a length around 33 cm). Two adjacent tear lines 51 and 52 are separated by a distance 6 in the machine direction MD.
  • the long unperforated segments 56 of length 4 ⁇ + ⁇ form attachment areas within the tear line 51 , 52 according to the cross-machine direction CD of the base sheet.
  • the long unperforated segments form a plurality of attachment areas between two consecutive portions according to the machine direction MD of the base sheet.
  • the resulting tensile strength of the tear lines 51 , 52 is significantly improved. This avoids, at least considerably reduces, the blowouts in the base sheet during production.
  • the breaks in the base sheet cannot propagate, at least with difficulty, along the tear line 51 or 52 .
  • the length 2 ⁇ may be chosen around or superior to 8 mm (i.e. ⁇ 4 mm).
  • FIG. 4 is a perspective view schematically illustrating the individual roll of sheet of absorbent material 4 manufactured according to the first embodiment of FIG. 2 or the second embodiment of FIG. 3 .
  • the roll 4 may be a roll of paper, for example a roll of toilet paper or a roll of kitchen towels.
  • the roll may comprise a core or may be coreless.
  • the roll has evenly spaced-apart transverse tear lines 50 , 51 , 52 which extend across the width of individual sheet of absorbent material 59 (e.g., a paper web).
  • the tear lines 50 , 51 , 52 enable tearing off and separation of individual sheets of paper 19 of a predetermined length L when the roll is unwound in the direction of the arrow.
  • FIG. 5 is a perspective view schematically illustrating a perforating unit 10 used for pinching the base sheet 1 according to the manufacturing method of the first exemplary embodiment.
  • the perforating unit 10 comprises the perforator roll 11 and the anvil roll 12 .
  • the space 18 is defined therebetween.
  • the perforator roll 11 carries at least one knife, for example two knifes 14 , 15 .
  • the first knife 14 is positioned at 180 degrees relatively to the second knife 15 . More knifes and different positioning angle are possible.
  • the anvil roll 12 carries a spiral blade 13 .
  • the perforator roll 11 and the anvil roll 12 are both rotating so that when the base sheet 1 is fed into the space 18 , it is pinched according to a scissors like movement between one of the knife 14 or 15 and the spiral blade 13 .
  • each knife 14 , 15 extends all along the width of the perforator roll 11 . This width corresponds at least to the width of the base sheet 1 or the width of the log 2 . Each knife is used to cut the tear line 50 (see FIG. 2 ) in the base sheet 1 .
  • Each knife 14 , 15 comprises multiple zones 16 , each zone corresponding to a perforation segment 55 having a defined perforating pattern that may be chosen among the represented perforating pattern of FIGS. 7 to 11 . Each zone 16 is separated from an adjacent zone by the distance 2. ⁇ .
  • FIG. 6 is a perspective view schematically illustrating another perforating unit 10 used for pinching the base sheet 1 according to the manufacturing method of the second exemplary embodiment.
  • the embodiment of FIG. 6 differs from the embodiment of FIG. 5 in that both knifes 14 and 15 comprises segmented zones 16 .
  • each segmented zone 16 corresponds to a perforation segment 55 having a defined perforating pattern that may be chosen among the represented perforating pattern of FIGS. 7 to 11 .
  • the first knife 14 is used to cut the first tear line 51 (see FIG. 3 ) in the absorbent base sheet 1 .
  • the second knife 15 is used to cut the second tear line 52 (see FIG. 3 ) in the absorbent base sheet 1 .
  • a zone 16 of the first knife 14 is shifted relatively to a zone 16 of the second knife 15 by the distance 2. ⁇ (corresponding to the two adjacent unperforated edge regions) so as to pinch the base sheet 1 according to staggered tear lines 51 and 52 .
  • FIG. 7 schematically illustrates a first exemplary perforating pattern of a perforation segment 55 A (top part) and the corresponding zone 16 A of the knife 14 , 15 (bottom part).
  • the perforation segment 55 A comprises two perforated segments 60 separated by one unperforated segment 61 .
  • the unperforated segment 61 forms an attachment area between two consecutive portions (according to the machine direction MD) of the base sheet.
  • Each perforated segment 60 forms a detachment area between two consecutive portions (according to the machine direction MD) of the base sheet.
  • the zone 16 A of the knife 14 , 15 comprises a succession of blade elements and notch corresponding to the first exemplary perforating pattern.
  • FIG. 8 schematically illustrates a second exemplary perforating pattern of a perforation segment 55 B (top part) and the corresponding zone 16 B of the knife 14 , 15 (bottom part).
  • the perforation segment 55 B comprises four perforated segments 62 , two adjacent perforated segments 62 being separated by an unperforated segment 63 .
  • the zone 16 B of the knife 14 , 15 comprises a succession of blade elements and notches corresponding to the second exemplary perforating pattern.
  • FIG. 9 schematically illustrates a third exemplary perforating pattern of a perforation segment 55 C (top part) and the corresponding zone 16 C of the knife 14 , 15 (bottom part).
  • the perforation segment 55 C comprises eighteen perforated segments 64 , two adjacent perforated segments 64 being separated by an unperforated segment 65 .
  • the zone 16 C of the knife 14 , 15 comprises a succession of blade elements and notches corresponding to the second exemplary perforating pattern.
  • FIG. 10 schematically illustrates a fourth exemplary perforating pattern of a perforation segment 55 D (top part) and the corresponding zone 16 D of the knife 14 , 15 (bottom part).
  • the perforation segment 55 D comprises multiple perforated segments 66 , two adjacent perforated segments 66 being separated by an unperforated segment 67 .
  • the width of the perforated segments 66 increases along the perforation segment 55 D, as depicted from the left to the right (or conversely).
  • the width of the unperforated segment 67 is constant along the perforation segment 55 D.
  • the zone 16 D of the knife 14 , 15 comprises a succession of blade elements and notches corresponding to the second exemplary perforating pattern. The width of the blade elements increases along the zone 16 D of the knife while the width of the notch is constant.
  • FIG. 11 schematically illustrates a fifth exemplary perforating pattern of a perforation segment 55 E (top part) and the corresponding zone 16 E of the knife 14 , 15 (bottom part).
  • the perforation segment 55 E comprises multiple perforated segments 68 , two adjacent perforated segments 68 being separated by an unperforated segment 69 .
  • the width of the perforated segments 68 is constant along the perforation segment 55 E.
  • the width of the unperforated segment 69 increases along the perforation segment 55 D, as depicted from the left to the right (or conversely).
  • the zone 16 E of the knife 14 , 15 comprises a succession of blade elements and notches corresponding to the second exemplary perforating pattern.
  • the width of the blade elements is constant along the zone 16 D of the knife while the width of the notch increases.
  • the roll of sheet of absorbent product of an embodiment of the invention can be dispensed in various dispensers, for example in center-feed dispensers for dispensing sheets from the center of the roll or in tangential dispensers for tangentially dispensing sheets from the roll.
  • Tensile strength measurements according to the standard CEN 12625-4 (determination of tensile strength, stretch at break and tensile energy absorption of tissue paper and tissue products) have been performed on sheets according to the prior art and according to an embodiment of the invention.
  • the characteristics of the central region comprising alternating perforated segments 60 , 62 , 64 , 66 , 68 of dimension and unperforated segments 61 , 63 , 65 , 67 , 69 of dimension US around 4 mm PS around 1 mm gives an unperforated ratio or bond ratio of 20% (1 mm over 5° mm).
  • the perforating pattern is the one of FIG. 9 .
  • Two plies 132 124 132 142 The log base sheet according to an embodiment of the invention can be converted at speeds typical in the industry, e.g., up to 650° m/min without the occurrence of sheet blowouts. This shows an improved tensile strength of each zone of weakness (tear line) of the log base sheet when runs into the converting machine.
  • the tensile strength of the sheet is similar, even less, to the one of the prior art, thus showing an easy dispensing.
  • an edge region having a width ( ⁇ ) ranging from about 3 mm to about 5 mm gives excellent results in term of tensile strength, thus allowing easy dispensing.
  • each zone of weakness (being a tear line) have been described and/or shown as extending substantially transversally to the machine direction. This should be interpreted in a broad sense, meaning that the zone of weakness may be inclined relatively the cross-machine direction CD, as an example according to angle in a range of ⁇ 10°.
  • absorbent sheet product is broad and encompasses numerous away-from-home, domestic or sanitary applications, e.g., towels, kitchen towels, hand towels, toilet papers, wipes, facial tissues, bath tissues, napkins etc.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Sanitary Thin Papers (AREA)
  • Making Paper Articles (AREA)
  • Nonwoven Fabrics (AREA)
US15/303,110 2014-04-10 2014-04-10 A sheet of absorbent material, roll, log and method for manufacturing the same Abandoned US20170037579A1 (en)

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Application Number Priority Date Filing Date Title
PCT/IB2014/001032 WO2015155563A1 (en) 2014-04-10 2014-04-10 A sheet of absorbent material, roll, log and method for manufacturing the same

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US (1) US20170037579A1 (ja)
EP (1) EP3129551A1 (ja)
CN (1) CN106471187A (ja)
AU (1) AU2014390217B2 (ja)
MX (1) MX2016013219A (ja)
RU (1) RU2016144004A (ja)
WO (1) WO2015155563A1 (ja)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180105349A1 (en) * 2015-04-30 2018-04-19 Kimberly-Clark Worldwide, Inc. Plurality of integrally interconnected wipes for use in dispenser
USD880875S1 (en) * 2018-05-09 2020-04-14 Alva Ellis Restroom paper
US20200206038A1 (en) * 2018-12-27 2020-07-02 Fameccanica.Data S.P.A. Apparatus for producing sanitary absorbent articles comprising a perforating device of a web and process
US20230059906A1 (en) * 2018-10-26 2023-02-23 The Procter & Gamble Company Paper towel rolls
EP4417173A1 (en) 2023-02-14 2024-08-21 Ontex BV Economical disposable absorbent article

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3592317A1 (en) * 2017-03-10 2020-01-15 Essity Hygiene and Health Aktiebolag Coreless roll of absorbent tissue web
ES2902524T3 (es) * 2017-09-29 2022-03-28 Essity Hygiene & Health Ab Rollo sin núcleo de hoja absorbente y método para fabricar el mismo
FR3096874B1 (fr) * 2019-06-07 2022-06-24 Republic Tech Na Llc Ensemble de filtres en carton en forme de batonnet, preforme pour sa fabrication et son emballage
CN111824839B (zh) * 2020-07-14 2022-05-27 安徽赛福电子有限公司 自由裁切的湿巾及包装体

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US2053786A (en) * 1934-11-14 1936-09-08 Louis A Straubel Method of forming paper rolls
US4551374A (en) * 1984-06-20 1985-11-05 The Holmberg Company Continuous sheet with perforated tear-off driving edge and recessed reinforced inner edge
US6010090A (en) * 1998-12-11 2000-01-04 Paper Converting Machine Co. Method of perforating a web
FR2907654B1 (fr) * 2006-10-31 2010-01-29 Georgia Pacific France Procede, dispositif de fabrication et rouleaux associes formes de feuilles a decoupes et predecoupes alternees
US20090155512A1 (en) * 2007-12-13 2009-06-18 Tsutama Satake Neto Rolls of material providing one-handed dispensing of sheets of pre-determined length

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180105349A1 (en) * 2015-04-30 2018-04-19 Kimberly-Clark Worldwide, Inc. Plurality of integrally interconnected wipes for use in dispenser
US10259641B2 (en) 2015-04-30 2019-04-16 Kimberly-Clark Worldwide, Inc. Plurality of interconnected wipes for use in dispenser
US11117733B2 (en) * 2015-04-30 2021-09-14 Kimberly-Clark Worldwide, Inc. Plurality of integrally interconnected wipes for use in dispenser
USD880875S1 (en) * 2018-05-09 2020-04-14 Alva Ellis Restroom paper
US20230059906A1 (en) * 2018-10-26 2023-02-23 The Procter & Gamble Company Paper towel rolls
US11952724B2 (en) * 2018-10-26 2024-04-09 The Procter & Gamble Company Paper towel rolls
US20200206038A1 (en) * 2018-12-27 2020-07-02 Fameccanica.Data S.P.A. Apparatus for producing sanitary absorbent articles comprising a perforating device of a web and process
EP4417173A1 (en) 2023-02-14 2024-08-21 Ontex BV Economical disposable absorbent article

Also Published As

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MX2016013219A (es) 2017-08-02
RU2016144004A (ru) 2018-05-10
WO2015155563A1 (en) 2015-10-15
AU2014390217B2 (en) 2017-02-16
EP3129551A1 (en) 2017-02-15
RU2016144004A3 (ja) 2018-05-10
AU2014390217A1 (en) 2016-10-20
CN106471187A (zh) 2017-03-01

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