US20020190152A1 - Roll product and winding method - Google Patents

Roll product and winding method Download PDF

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Publication number
US20020190152A1
US20020190152A1 US10/139,232 US13923202A US2002190152A1 US 20020190152 A1 US20020190152 A1 US 20020190152A1 US 13923202 A US13923202 A US 13923202A US 2002190152 A1 US2002190152 A1 US 2002190152A1
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US
United States
Prior art keywords
core
film
flat board
sheet
winding
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
US10/139,232
Other languages
English (en)
Inventor
Yoshihisa Haraikawa
Tomohiro Haraikawa
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.)
Daikin Industries Ltd
Original Assignee
Daikin Industries Ltd
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
Priority claimed from JP2001137451A external-priority patent/JP2002332164A/ja
Priority claimed from JP2001141663A external-priority patent/JP2002338145A/ja
Priority claimed from JP2001189860A external-priority patent/JP3579008B2/ja
Priority claimed from JP2001394951A external-priority patent/JP2003192236A/ja
Priority claimed from JP2001394945A external-priority patent/JP2003192237A/ja
Priority claimed from JP2002102689A external-priority patent/JP2003292251A/ja
Application filed by Daikin Industries Ltd filed Critical Daikin Industries Ltd
Assigned to DAIKA KOGYO CO., LTD. reassignment DAIKA KOGYO CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HARAIKAWA, YOSHIHISA, HARAIKAWA, TOMOHIRO
Publication of US20020190152A1 publication Critical patent/US20020190152A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H18/00—Winding webs
    • B65H18/28—Wound package of webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/18—Constructional details
    • B65H75/22—Constructional details collapsible; with removable parts
    • B65H75/2209—Constructional details collapsible; with removable parts collapsible by use of hinged or slidable parts; foldable without removing parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/18—Constructional details
    • B65H75/28—Arrangements for positively securing ends of material
    • 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
    • B65H2301/4143—Performing winding process
    • B65H2301/41432—Performing winding process special features of winding process
    • B65H2301/414325—Performing winding process special features of winding process winding a core in-line with the web, e.g. wound core made out of sheet material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2402/00—Constructional details of the handling apparatus
    • B65H2402/40—Details of frames, housings or mountings of the whole handling apparatus
    • B65H2402/41—Portable or hand-held apparatus
    • B65H2402/412—Portable or hand-held apparatus details or the parts to be hold by the user, e.g. handle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
    • B65H2515/12—Density
    • 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
    • B65H2701/17—Nature of material
    • B65H2701/175—Plastic
    • B65H2701/1752—Polymer film
    • 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
    • B65H2701/50—Storage means for webs, tapes, or filamentary material
    • B65H2701/51—Cores or reels characterised by the material
    • B65H2701/511—Cores or reels characterised by the material essentially made of sheet material
    • B65H2701/5112—Paper or plastic sheet material

Definitions

  • This invention relates to a roll product of a plastic film such as stretch film for packaging, food wrapping film, or a plastic sheet for e.g. packaging container, wound around a tubular member formed of flat cardboard instead of a paper tube, and a winding method for manufacturing roll products.
  • a plastic film such as stretch film for packaging, food wrapping film, or a plastic sheet for e.g. packaging container, wound around a tubular member formed of flat cardboard instead of a paper tube, and a winding method for manufacturing roll products.
  • Plastic films and sheets for packaging such as stretch film used to prevent collapse of articles on pallets and food wrapping film are 300 mm to 500 mm wide and usually as long as several hundred meters.
  • a paper tube having a high strength is usually used as a core.
  • a coreless roll product in which the winding density is increased at the wind-start portion, i.e. the radially central portion of the roll product and the plastic film is wound with the high-density central portion as a core.
  • wound film is often in close contact with adjacent layer at the high-density central portion, so that it cannot be used to the last. Thus, this portion becomes a waste. Also, as the end of use becomes near, the shape retainability of the roll itself worsens, so that the work of wrapping the film around an article while pulling the film becomes difficult.
  • the stretch film is usually formed of a polyolefin resin having a thickness of about 18 ⁇ m and a width of 500 mm and it is wound onto the core while imparting a tension of 5-8 kg/m, a large residual stress is produced in the stretch film that has been wound onto the core. Therefore, during storage after winding, the core itself may be destroyed by compression, or if it is left in a high-temperature atmosphere for a long time, winding displacement in the axial direction of the core may develop, thus lowering its commercial value.
  • An object of this invention is to provide a roll product which does not use a paper tube for its core, which makes it possible to discard the used core without difficulty, which makes it possible to use a wound long strip of sheet or film to the last inch without waste, and which will not develop compressive destruction of the core or winding displacement.
  • the core is formed by cylindrically bending a flat board of a material which can be developed into a flat board.
  • the core By forming the core by cylindrically bending the flat board, it can be returned to a flat board state after use. Thus it is not so bulky as conventional paper tubes, so that it can be easily discarded or recycled.
  • the material for the flat board by selecting one having required strength or rigidity, since the cylindrically bent flat board has shape retainability necessary for the core with the sheet or film wound therearound, it is possible to use up the wound sheet or film to the last.
  • the core may be formed by joining together both side edges of the bent flat board.
  • the core may be formed with a gap provided between both side edges of the bent flat board.
  • the wound sheet or film By forming the core with a gap provided between the side edges of the flat board, the wound sheet or film enters the gap between the side edges of the flat board. By the interposition of the sheet or film, circumferential displacement of both sides is prevented. After winding, in the process of pulling out the sheet or film, the core retains the cylindrical shape and it is possible to prevent its inner diameter from decreasing. This makes it possible for the wound sheet or film to be shape-retained along the core even at the end of use and thus to use it with a tensile force applied to the last.
  • the core may be formed with both side edges of the bent flat board abutting each other.
  • the sheet or film due to frictional force acting between its end, flat board and the mandrel of the winding machine, even if it is not fastened to the core using an adhesive or the like, the sheet or film can be wound without slipping.
  • the flat board is preferably formed of cardboard.
  • Two or more flat boards may be used to form a core by putting one on another around the mandrel of a winding machine.
  • the wound film is a stretch film, it is preferably wound with the tension during winding restricted such that when a cut having a depth of 10 mm or over is formed in the wound stretch film roll over the entire width in the axial direction, the width of widening of the cut produced due to residual stress in the stretch film is 5 mm or less.
  • Caps each having a fitting portion and a flange portion are preferably fitted in both ends of the core.
  • the core is radially restricted at both ends, so that its shape retainability improves. Even if the width of the sheet or film increases, in the process of pulling out the sheet or film after winding, it is possible to prevent the inner diameter of the core from decreasing.
  • the core is also restricted in the axial direction at its both ends by the flange portions of the caps, in the process of pulling out the sheet or film, it is possible to reliably prevent the core from coming out of the roll of wound sheet or film.
  • Both ends of the core preferably protrude from both ends of the wound and superposed sheet or film.
  • the caps can be easily fitted in the core. Also, normally, since the flange portions of the caps do not contact the end faces of the wound sheet or film, in the process of using the sheet or film by pulling it out, the ends of the sheet or film will not contact the flange portions of the caps, so that there will be no trouble of pulling out.
  • FIG. 1 is a perspective view showing a roll product of an embodiment of this invention
  • FIG. 2 is a sectional view of the same
  • FIG. 3 is a perspective view showing how the winding is started
  • FIG. 4 is a sectional view of the state of FIG. 3;
  • FIG. 5 is a sectional view showing the state at an initial stage of winding
  • FIG. 6 is a perspective view showing the state in which a core has been formed in the initial stage of winding
  • FIG. 7 is a sectional view showing a portion of FIG. 6;
  • FIG. 8A is a sectional view showing another embodiment
  • FIG. 8B is a sectional view showing a winding start portion of the roll of FIG. 8A;
  • FIG. 9A is a sectional view of a still another embodiment
  • FIG. 9B is a sectional view showing a portion of the roll of FIG. 9A;
  • FIG. 10 is a sectional view showing the roll of a further embodiment
  • FIG. 11 is a sectional view showing one example of a core of the roll of another embodiment
  • FIG. 12 is a perspective view showing how the core shown in FIG. 11 is formed
  • FIG. 13 is a sectional view showing another example of the core
  • FIG. 14 is a perspective view showing how the core shown in FIG. 13 is formed
  • FIG. 15 is an exploded perspective view showing a roll of another embodiment with caps fitted in both ends of the core;
  • FIG. 16 is a longitudinal sectional side view of the roll of FIG. 15;
  • FIG. 17 is a sectional view taken along line A-A of FIG. 12;
  • FIG. 18 is a perspective view showing how a cut is formed in the roll of stretch film
  • FIG. 19 is a sectional view of another embodiment.
  • FIG. 20 is a sectional view taken along line A-A of FIG. 19.
  • FIGS. 1 and 2 show a roll product 1 embodying the present invention.
  • the roll product 1 is made by winding a long strip of plastic sheet or film 4 onto a core formed by bending a flat board 2 of cardboard with a gap 3 formed between side edges thereof, with its end portion 4 a inserted into the inner side of the bent flat board 2 through the gap 3 .
  • the tapered end portion 4 a of the rolled sheet or film 4 which is set on a spool 6 of a winding machine, is put on the outer peripheral surface of a mandrel 5 of the winding machine.
  • the flat board 2 of cardboard having such a length B that when wound around the mandrel 5 , the gap 3 exists between both side edges, is supplied with its end slightly bent, inside of the sheet or film 4 so as to contact the outer peripheral surface of the mandrel 5 .
  • the roll product 1 of a long strip of plastic sheet or film is thus obtained in which as shown in FIGS. 1 and 2 , without using a conventional paper tube, the core 2 a is formed by bending the flat board 2 of cardboard.
  • the core 2 a can be developed into a flat board after use.
  • the flat board 2 besides paper materials such as cardboard, a sheet of a synthetic resin such as polyethylene or polypropylene can be used.
  • the sheet or film disposed in the gap 3 serves as a slip stop.
  • both side edges will not slip on each other even if both side edges are not bonded together with an adhesive, so that it is possible to retain the cylindrical shape.
  • the core 2 a will not break or shrink. It is also possible to prevent axial displacement of the core 2 a . This makes it possible to use the wound long strip of film or sheet to the last inch with a tensile force applied thereto.
  • the end of sheet or film 4 can be caught in the cylinder of the core 2 a merely by putting the end portion 4 a of the film or sheet 4 on the outer periphery of the mandrel 5 , feeding the flat board 2 into inside of the sheet or film in contact with the outer periphery of the mandrel 5 and turning the shaft 7 of the mandrel.
  • the slip-stop effect by the end of film caught eliminates the need of bonding the side edges of the flat board together and fastening the end portion 4 a of the film 4 to the core 2 a . This simplifies the winding work for the roll.
  • the end portion 4 a of the film 4 may not be tapered as shown in FIG. 3 but be left straight.
  • FIGS. 8A and 8B show a roll la of another embodiment in which the length B of the flat board 2 is longer than in the embodiment of FIG. 3 so that its side edges will overlap each other, and the end portion 4 a of the film 4 gets caught through the overlapped portion into inside of the flat board 2 .
  • the slip-stop effect by the end portion 4 a of the film 4 caught at the overlapped portion prevents the side edges of the flat board 2 from slipping on each other and prevents the core 2 a from 1 shrinking and prevents axial displacement of the core 2 a .
  • the film it is possible to use up the film to the last inch with a suitable tension applied thereto.
  • FIGS. 9A and 9B show a roll product 1 b of the third embodiment.
  • a flat board 2 of cardboard is placed along the mandrel 5 of the winding machine, and bent so that a gap 3 is present between its both side edges to form a core 2 a , and the end portion of sheet or film 4 is fastened to the core 2 a and the film is wound around the core 2 a.
  • the sheet or film 4 is received in the gap 3 between the side edges of the flat board 2 .
  • the end portion 4 a of the sheet of film 4 is fastened to the core 2 a , it can be wound without slipping, so that after winding, axial displacement of the core 2 a is prevented.
  • FIG. 10 shows a roll product 1 c of the fourth embodiment.
  • a flat board 2 of cardboard is cylindrically bent along the mandrel 5 of the winding machine so that both side edges of the thus bent flat board 2 will abut together to form a core 2 a , and the end of the sheet or film 4 is fastened to the core and the film is wound.
  • FIG. 11 shows an example of the core 2 a of a roll product of another embodiment. As shown by chain line in FIG. 12, it is formed by cylindrically bending a rectangular flat board 2 and bonding both side edges together with an adhesive 9 .
  • FIG. 13 shows another example of the core 2 a . As shown by chain line in FIG. 14, it is formed by cylindrically bending a rectangular flat board 2 and bonding both side edges together with an adhesive tape 10 .
  • These flat boards 2 can be cylindrically bent by putting them on a cylinder or mandrel of a winding machine. As described above, by joining both sides, the core 2 a is formed. By winding sheet or film 4 thereon, a roll product can be produced.
  • the flat board 2 may be cylindrically bent beforehand, its both sides be joined together and it may be mounted on the mandrel of a winding machine. By joining both sides of the flat board 2 with an adhesive or an adhesive tape, the shape retainability of the core 2 a further improves.
  • FIGS. 15 - 17 show a roll product 1 d of the fifth embodiment.
  • this roll product 1 d as with the roll product 1 a shown in FIGS. 8A and 8B, on a core 2 a formed by cylindrically bending a flat board 2 of cardboard with an overlap 2 b between both side edges of the flat board 2 , a long strip of sheet or film 4 is wound with its end portion 4 a getting caught into the inner side of the core 2a through between both side edges overlapped.
  • caps 8 formed of a synthetic resin are mounted at both ends of the core 2 a .
  • Each cap 8 comprises a fitting portion 8 a and a flange portion 8 b provided at one end thereof. Their flange portions 8 b are in abutment with the end faces of the core 2 a . Since both ends of the core 2 a protrude from both ends of the wound sheet or film 4 , gaps s are present between both ends of the sheet or film 4 and the flange portions 8 b of the caps 8 .
  • the shape retainability of the core 2 a improves, so that after winding, in the process of unwinding the sheet or film 4 for use, the core 2 a is prevented from shrinking. As the width of the film or sheet increases, this is more effective.
  • caps 8 having fitting portions 8 a of different lengths according to the width of the sheet or film, i.e. the length of the core 2 a it is possible to more effectively cope with a wide sheet or film 4 .
  • the caps 8 may be fitted into its both ends.
  • the caps 8 may be fitted into both ends of the core 2 a.
  • the slip stop effect of the sheet or film 4 caught in the gap 3 of the cylindrically bent flat board 2 improves the shape retainability of the core 2 a , in addition to the fact that the caps 8 are fitted.
  • the fact that both abutting side edges of the flat board 2 will not slip on each other, as well as the fact that the caps 8 are fitted improves the shape retainability of the core 2 a .
  • the core 2 a After winding, in the process of unwinding the sheet or film for use, the core 2 a will not shrink and it is possible to use the wound sheet or film to the last inch with a tensile force applied.
  • FIGS. 19 and 20 show another embodiment which is substantially the same in other embodiments except that two flat boards 2 a , 2 b are used to form a core, put one on another around the mandrel of a winding machine.
  • One of the flat boards may have a smaller width than the width of the film wound.
  • Table 1 shows the results of tests in which the influence of the tension applied to stretch film during winding on winding shrinkage and winding displacement was examined for roll products of stretch film.
  • a polyolefin resin stretch film having a thickness of 18 ⁇ m and a width of 500 mm was wound by a winding machine to a length of 300 meters while adjusting the speed between the mandrel 5 and the spool 6 .
  • Setting the tension per unit width applied to the stretch film was set to three different values, 8 kg/m, 5 kg/m and 0.5 kg/m, various rolls of stretch film were made by winding it onto paper tubes having different thicknesses and an inner diameter of 3 inches. After leaving them for four hours in a 40° C. atmosphere, they were checked on whether the paper tubes were destroyed due to winding shrinkage or whether winding displacement occurred.
  • the core is formed by cylindrically bending a flat board made of cardboard or synthetic resin sheet, it can be returned to a flat board after use. Thus, it is not so bulky as conventional paper tubes and can be easily discarded or recycled.
  • both side edges of the flat board are prevented from slipping on each other by providing the gap between both side edges of the cylindrically bent flat board with the end of the film received in the gap, abutting both side edges, or biting the end portion of the sheet or film into the cylinder.
  • the core has the shape retainability required.
  • the core is restricted in the radial direction, so that the shape retainability improves.
  • the width of the sheet or film is large, in the process of using the sheet or film by pulling it out, it is possible to prevent the inner diameter of the core from decreasing.
  • the core is restricted in the axial direction, too, at its both ends by the flange portions of the caps, it is possible to reliably prevent the core from moving in the axial direction or from coming out.

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  • Storage Of Web-Like Or Filamentary Materials (AREA)
US10/139,232 2001-05-08 2002-05-07 Roll product and winding method Abandoned US20020190152A1 (en)

Applications Claiming Priority (12)

Application Number Priority Date Filing Date Title
JP2001-137451 2001-05-08
JP2001137451A JP2002332164A (ja) 2001-05-08 2001-05-08 ロール製品
JP2001-141663 2001-05-11
JP2001141663A JP2002338145A (ja) 2001-05-11 2001-05-11 ロール製品
JP2001189860A JP3579008B2 (ja) 2001-06-22 2001-06-22 ストレッチフィルムのロール体
JP2001-189860 2001-06-22
JP2001-394945 2001-12-26
JP2001-394951 2001-12-26
JP2001394951A JP2003192236A (ja) 2001-12-26 2001-12-26 ロール製品とその巻き取り方法
JP2001394945A JP2003192237A (ja) 2001-12-26 2001-12-26 ロール製品
JP2002-102689 2002-04-04
JP2002102689A JP2003292251A (ja) 2002-04-04 2002-04-04 ロール製品

Publications (1)

Publication Number Publication Date
US20020190152A1 true US20020190152A1 (en) 2002-12-19

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ID=27554935

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/139,232 Abandoned US20020190152A1 (en) 2001-05-08 2002-05-07 Roll product and winding method

Country Status (5)

Country Link
US (1) US20020190152A1 (ko)
EP (1) EP1256541A3 (ko)
KR (1) KR20020085834A (ko)
CN (1) CN1384036A (ko)
AU (1) AU3703502A (ko)

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US20090101748A1 (en) * 2005-05-02 2009-04-23 Fabio Perini S.P.A. Coreless Roll of Web Material, Machine and Method for its Production
US20100320302A1 (en) * 2009-06-23 2010-12-23 Catbridge Machinery, Llc In-Line Formed Core Supporting a Wound Web
US20100327100A1 (en) * 2009-06-24 2010-12-30 Elsner Engineering Works Foil roll with wound stiffening core, apparatus for winding the roll and method
US20130320124A1 (en) * 2011-01-14 2013-12-05 Alain Rochon Rolled Sheets of Floor Covering and Manufacture
US9290348B2 (en) 2010-12-17 2016-03-22 3M Innovative Properties Company Open gap film roll core
US20190330002A1 (en) * 2016-10-26 2019-10-31 Eastman Performance Films, Llc Packaged flexible film and flexible film packaging system therefor
US20230043876A1 (en) * 2020-11-10 2023-02-09 Showa Denko Materials Co., Ltd. Reel body, method for manufacturing reel body, and method for manufacturing article
US20230095152A1 (en) * 2016-10-12 2023-03-30 Sonoco Development, Inc. Core with cushion strip and varying slot depth

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CN112225001B (zh) * 2020-12-16 2021-04-27 江苏卓高新材料科技有限公司 隔膜卷筒的使用方法
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EP1256541A2 (en) 2002-11-13
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AU3703502A (en) 2002-11-14
CN1384036A (zh) 2002-12-11

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