WO2007043421A1 - Adhesive label and adhesive label roll - Google Patents

Adhesive label and adhesive label roll Download PDF

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Publication number
WO2007043421A1
WO2007043421A1 PCT/JP2006/319913 JP2006319913W WO2007043421A1 WO 2007043421 A1 WO2007043421 A1 WO 2007043421A1 JP 2006319913 W JP2006319913 W JP 2006319913W WO 2007043421 A1 WO2007043421 A1 WO 2007043421A1
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WO
WIPO (PCT)
Prior art keywords
adhesive
adhesion
adhesive label
peel
label
Prior art date
Application number
PCT/JP2006/319913
Other languages
French (fr)
Other versions
WO2007043421A9 (en
Inventor
Haruhito Arimitsu
Yoshio Ishiduka
Nobuyasu Akiyoshi
Kazuyoshi Suehara
Original Assignee
Fujifilm Corporation
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 Fujifilm Corporation filed Critical Fujifilm Corporation
Publication of WO2007043421A1 publication Critical patent/WO2007043421A1/en
Publication of WO2007043421A9 publication Critical patent/WO2007043421A9/en

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/08—Fastening or securing by means not forming part of the material of the label itself
    • G09F3/10—Fastening or securing by means not forming part of the material of the label itself by an adhesive layer
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps

Definitions

  • the present invention relates to an adhesive label bonded to a film having an alternate array of peel-off and residual sections joining the peel-off sections, and to an adhesive label' roll having such adhesive labels.
  • Substrates for use in liquid-crystal panels, printed wiring boards, and PDPs include a photosensitive sheet (photosensitive web) having a photosensitive material layer (photosensitive resin layer) applied thereon to the surface of the substrate.
  • the photosensitive sheet comprises a photosensitive material layer and a protective film (cover film) that are successively laminated onto a flexible plastic support .
  • An applying apparatus used to apply the photosensitive sheet to the substrate operates as follows: Substrates, such as glass substrates, resin substrates, or the like, are fed at predetermined spaced intervals . Lengths of a protective film are peeled off from the photosensitive sheet in alignment with respective areas of the photosensitive material layer, which are in turn applied to the substrate.
  • Japanese Laid-Open Patent Publication No. 2001-6995 discloses a film applying process.
  • a multilayer film 1 changes its direction of travel around a direction changing roll 2, which is disposed closely to a cover film peeling mechanism 3.
  • the multilayer film 1 comprises a laminated assembly made up of a base film Ia, a resist film Ib, and a cover film Ic.
  • the cover film Ic has perforations Ie defined therein at predetermined spaced intervals .
  • the cover film peeling mechanism 3 has an adhesive tape supply roll 4a for supplying an adhesive tape 4, an adhesive tape cutter 5 for cutting off the adhesive tape 4, an adhesive tape pressing roll 6 for pressing the adhesive tape 4 against the cover film Ic, an adhesive tape holding base 7 for holding the adhesive tape 4 under a vacuum, and a cover film takeup roll 8 for winding the cover film Ic as it is peeled off from the multilayer film 1.
  • a holder roll 9a for holding the cover film Ic and a control roll 9b are disposed between the cover film takeup roll 8 and the adhesive tape pressing roll 6.
  • the cover film Ic which has just been peeled off from the multilayer film 1 , has a trailing end to which the leading end of the adhesive tape 4 is applied.
  • the cover film Ic When the cover film Ic is wound by the cover film takeup roll 8, it pulls the adhesive tape 4 out of the adhesive tape supply roll 4a.
  • perforations Ie positioned between the cover film Ic and a remaining cover film Id move toward a position immediately above the adhesive tape pressing roll 6.
  • the adhesive tape pressing roll 6 Immediately before the perforations Ie reach that position, the adhesive tape pressing roll 6 is lifted to apply the adhesive tape 4 to the leading end of the cover film Ic.
  • the adhesive tape 4 While the adhesive tape 4 is attracted to the adhesive tape holding base 7 under a vacuum, the adhesive tape holding base 7 is lowered to cause the adhesive tape cutter 5 to cut off the adhesive tape 4.
  • the adhesive tape 4 is applied to the cut-off cover film Ic and to the cover film Ic on the multilayer film 1 across the remaining cover film Id. Therefore, the cover film Ic is peeled off from the multilayer film 1, while the remaining cover film Id remains on the multilayer film 1.
  • the above apparatus for performing the conventional film applying process is considerably complex in structure, because the adhesive tape pressing roll 6 and the adhesive tape holding base 7 are angularly displaced. Further, the direction changing roll 2 cannot firmly hold the multilayer film 1. Especially, when the cover film Ic is peeled off from the multilayer film 1, peeling shocks tend to be applied to the multilayer film 1. Consequently, a laminated section of a substrate, which is positioned downstream from the film applying apparatus, is liable to develop striped defective regions thereon. Since the adhesive tape pressing roll 6 presses the adhesive tape 4 in linear contact therewith, the adhesive tape 4 cannot firmly be applied to the cover film Ic with a sufficient bonding strength. In addition, the film applying process requires tedious and time-consuming maintenance for removing the adhesive material from the adhesive tape cutter 5.
  • the film applying apparatus requires a plurality of cover film peeling mechanisms 3 arrayed in the transverse direction of the multilayer film 1, because a plurality of adhesive tapes 4 need to be applied to the cover film Ic at spaced positions along the transverse direction of the multilayer film 1, in order to reliably peel off the cover film Ic from the multilayer film 1. Accordingly, the film applying apparatus is large in overall size and costly to manufacture. Furthermore, a plurality of adhesive tape supply rolls 4a must be installed at spaced intervals along the transverse direction of the multilayer film 1.
  • Japanese Laid-Open Patent Publication No. 5-173487 discloses an adhesive label comprising a base in the form of a heat-shrinkable plastic film or sheet with a layer of an adhesive agent disposed on one surface of the base, wherein the adhesive agent can have its adhesion force lowered by contact with warm water.
  • the adhesive label does not require use of the adhesive tape cutter 5 , and hence maintenance of the tape cutter is not needed.
  • the adhesive label can easily be peeled off from the cover film Ic simply by being immersed in warm water.
  • the present invention concerns an adhesive label bonded to a web, having alternately arranged peel-off sections and residual sections.
  • the adhesive label joins the peel-off sections to each other.
  • the adhesive label includes a non-adhesion area arranged centrally on an adhesion surface thereof, which is to be bonded to the peel-off sections, wherein the non- adhesion area has no adhesion force or merely a weak adhesion force, and can be brought into and out of contact with each of the residual sections.
  • First adhesion areas are disposed respectively on opposite ends of the adhesion surface in a peel-off direction, the first adhesion areas being bonded to the peel-off sections, with the residual section interposed therebetween.
  • Second adhesion areas are disposed between the non-adhesion area and the first adhesion areas, the second adhesion areas being positioned in covering relation to boundaries between the peel-off sections and the residual section, the second adhesion areas having an adhesion force weaker than that of the first adhesion areas.
  • the adhesive label is made of a heat- shrmkable material or from the same resin material as the film.
  • An adhesive label made of such a material can be reprocessed easily.
  • the adhesive label has a water-soluble adhesive or a heat-peelable adhesive. Such an adhesive can be processed easily and has increased environmental resistance.
  • the present invention further concerns an adhesive label roll having a plurality of adhesive labels, each of the adhesive labels being bonded to a web having alternately arranged peel-off sections and residual sections for joining the peel-off sections to each other, and a peel-off sheet wound into a roll, wherein the adhesive labels are removably applied to the peel-off sheet at predetermined spaced xntervals .
  • the adhesive labels are used instead of an ordinary elongate adhesive tape, a complex tape cutting mechanism is not required, and hence no cutter maintenance is needed. Consequently, the adhesive labels can reliably be applied using a simple and economical arrangement .
  • the adhesive label has second adhesion areas disposed between the non-adhesion area and the first adhesion areas, wherein the second adhesion areas have an adhesion force which is weaker than that of the first adhesion areas.
  • the second adhesion areas are positioned in covering relation to boundaries between the peel-off sections and the residual section. Therefore, insofar as the boundaries between the peel-off sections and the residual section are present within the width of the second adhesion areas, the accuracy with which the adhesive label is bonded, as well as the accuracy with which the adhesive label is fabricated, do not need to be strict. As a result, the mechanism for bonding the adhesive labels is simplified, and the adhesive labels can be manufactured at a reduced cost.
  • FIG. 1 is a perspective view of an adhesive label roll having a plurality of adhesive labels according to the present invention
  • FIG. 2 is a schematic view of a manufacturing apparatus employing the adhesive label roll
  • FIG. 3 is a fragmentary cross-sectional view of an elongate photosensitive web used in the manufacturing apparatus
  • FIG. 4 is a front elevational view of an adhesive label bonding mechanism provided within the manufacturing apparatus ;
  • FIG. 5 is a plan view of the adhesive label bonding mechanism
  • FIG. 6 is a fragmentary perspective view of the adhesive label bonding mechanism
  • FIG. 7 is a side elevational view of the adhesive label bonding mechanism
  • FIG. 8 is a fragmentary plan view of the elongate photosensitive web having adhesive labels applied thereto;
  • FIG. 9 is an enlarged fragmentary front elevational view showing the manner in which the adhesive label bonding mechanism operates.
  • FIG. 10 is an enlarged fragmentary front elevational view showing the manner in which the adhesive label bonding mechanism operates
  • FIG. 11 is an enlarged fragmentary front elevational view showing the manner in which the adhesive label bonding mechanism operates ;
  • FIG. 12 is a fragmentary side elevational view showing the manner in which a protective film is peeled off from the elongate photosensitive web;
  • FIG. 13 is a fragmentary cross-sectional view of glass substrates to which a photosensitive resin layer is transferred;
  • FIG. 14 is a diagram showing the relationship between the adhesive agent dissolving level (%) and the adhesive force;
  • FIG. 15 is a schematic side elevational view of a conventional film applying apparatus .
  • FIG. 1 shows in perspective an adhesive label roll 12 having a plurality of adhesive labels 10 according to the present invention.
  • FIG. 2 shows schematically a manufacturing apparatus 20, which employs the adhesive label roll 12.
  • the adhesive labels 10 are applied at spaced intervals to an elongate paper peel-off sheet 14, which is rolled into an adhesive label roll 12.
  • Each of the adhesive labels 10 is made of synthetic paper, primarily composed of polypropylene (PP) , for example, having a thickness of 80 ⁇ m.
  • Each of the adhesive labels 10 has a non-adhesion area 10a positioned centrally on a reverse side (adhesion side) thereof, facing the peel- off sheet 14, wherein the non-adhesion area 10a is not coated with an adhesive, and has no adhesion force or only a weak adhesion force.
  • Each of the adhesive labels 10 also includes first adhesion areas 10b, 10c disposed on opposite ends of the adhesive label 10 in a peel-off direction, i.e., on longitudinally opposite ends of the reverse side facing the peel-off sheet 14, and second adhesion areas 1Od, 1Oe disposed between the non-adhesion area 10a and the first adhesion areas 10b, 10c.
  • the second adhesion areas 1Od, 1Oe have a weaker adhesion force than that of the first adhesion areas 10b, 10c.
  • Each of the first and second adhesion areas 10b, 10c has a layer of a water-soluble acrylic adhesive agent deposited to a thickness of 5 ⁇ m, the acrylic adhesive agent being dissolvable in water, warm water, alkaline water, or the like.
  • the first and second adhesion areas 10b, 10c have a bonding strength set to a range from 1 to 2N/15 mm width (20 0 C) for 180° peeling with respect to polypropylene, which is the material that makes up a protective film 30, to be described later on.
  • the first and second adhesion areas 10b, 10c may employ a heat-peelable adhesive agent, which can easily be peeled off with heat (see Japanese Laid-Open Patent Publication No. 7-219439, for example).
  • the non-adhesion area 10a is formed by processing the adhesive agent of the first adhesion areas 10b, 10c in order to produce an area having no or almost no sticking force, i.e., by dissolving the adhesive agent of the first adhesion areas 10b, 10c.
  • the adhesive agent can be dissolved by printing an adhesive-agent-dissolving ink on the reverse side of the adhesive label 10. The printing process is effective to increase the accuracy at which the adhesive label 10 is shaped, as well as to reduce the cost for producing the adhesive label 10.
  • the second adhesion areas 1Od, 1Oe are formed by changing the halftone-dot shape or halftone-dot size of the printing plate that prints the adhesive-agent-dissolving ink, in order to establish a desired sticking force or sticking shape.
  • the adhesive-agent-dissolving ink may be printed by flexography, offset printing, letterpress printing, silk screen printing, or the like.
  • the adhesive-agent-dissolving ink may be printed repeatedly in a plurality of cycles.
  • the second adhesion areas 1Od, 1Oe and the non-adhesion area 10a may successively be formed by changing the thickness and width at which the adhesive-agent-dissolving ink is printed during the first and second printing cycles. Specifically, the second adhesion areas 1Od, 1Oe may be formed in the first printing cycle, and the non-adhesion area 10a may be formed in the second printing cycle.
  • FIG. 3 shows in cross section a photosensitive web 22, which is employed in the manufacturing apparatus 20.
  • the photosensitive web 22 comprises a laminated assembly made up of a flexible base film (support) 26, a photosensitive resin layer (photosensitive material layer) 28 disposed on the flexible base film 26, and a protective film 30 disposed on the photosensitive resin layer 28.
  • the manufacturing apparatus 20 comprises a web reel-out mechanism 32 accommodating a photosensitive web roll 22a therein, in the form of a rolled photosensitive web 22, wherein the photosensitive web 22 is reeled out from the photosensitive web roll 22a, a partial cutter 36 for forming partially cut regions 34 (see FIG. 3), which are transversely severable in the protective film 30 of the photosensitive web 22 that is reeled out from the photosensitive web roll 22a, a label bonding mechanism 40 for bonding adhesive labels 10 (see FIG.
  • a dancer mechanism 42 for changing the feed mode of the photosensitive web 22 from a tact mode, i.e., an intermittent feed mode, to a continuous feed mode
  • a peeling mechanism 44 for peeling a predetermined length of the protective film 30 from the photosensitive web 22
  • a joining mechanism 46 for joining an exposed area of the photosensitive resin layer 28, from which a predetermined length of the protective film 30 has been peeled off, to a glass substrate 24, and a web cutting mechanism 48 for cutting off the photosensitive web 22 between respective glass substrates 24.
  • Another web cutting mechanism 48a which is used when the manufacturing apparatus 20 begins to operate, is disposed upstream of the web cutting mechanism 48.
  • the partial cutter 36 is disposed near the label bonding mechanism 40 and downstream of a roller pair 50, for calculating the diameter of the photosensitive web roll 22a accommodated in the web reel-out mechanism 32.
  • the partial cutter 36 has a guide member 53 fixed to a movable table 52, which is movable in the direction indicated by the arrow A, and which extends in the direction indicated by the arrow B transversely across the photosensitive web 22.
  • a running base 54 which is movable in the direction indicated by the arrow B by an actuator comprising a motor and a ball screw or the like (not shown), is supported on the guide member 53.
  • the running base 54 supports thereon a pair of circular blades 56a, 56b.
  • the circular blades 56a, 56b move transversely across the photosensitive web 22 and simultaneously form two partially cut regions 34, respectively, in the photosensitive web 22 at respective given positions thereon, leaving a residual section 30b interposed therebetween.
  • the running base 54 can be placed selectively in two retracted positions, as indicated by the two-dot-and-dash- line positions in FIG. 4, which project outwardly from opposite edges of the photosensitive web 22 in the transverse direction.
  • a suction base 57 is disposed below the running base 54 for attracting and holding the photosensitive web 22 when the circular blades 56a, 56b form the partially cut regions 34 in the photosensitive web 22.
  • the suction base 57 is vertically movably mounted on a movable table 52 through vertically moving cylinders 55.
  • the partially cut regions 34 must be formed in and across at least the protective film 30.
  • the circular blades 56a, 56b are set to a given cutting depth, which is large enough to cut into the photosensitive resin layer 28 in order to reliably cut off the protective film 30.
  • the circular blades 56a, 56b may be fixed against rotation and moved transversely across the photosensitive web 22 to form partially cut regions 34, or the circular blades 56a, 56b may be rotated without slippage on the photosensitive web 22 and moved transversely across the photosensitive web 22 to form the partially cut regions 34.
  • Each of the circular blades 56a, 56b may be replaced with a laser beam or an ultrasonic cutter, a knife blade, or a pushing blade (Thompson blade), for example.
  • the partial cutter 36 has a single circular blade, and two partial cutters 36 may be provided at a spaced interval in the direction indicated by the arrow A in which the photosensitive web 22 is fed.
  • the partially cut regions 34 formed in the protective film 30 serve to set a spaced interval between two adjacent glass substrates 24.
  • such partially cut regions 34 are formed in the protective film 30 at positions that are spaced 10 mm inwardly from respective edges of the glass substrates 24.
  • the section of the protective film 30, which is interposed between the partially cut regions 34, serves to prevent the laminating rollers (i.e., rubber rollers 136a, 136b to be described later on) from smearing when the photosensitive resin layer 28 is applied to the glass substrate 24 by the joining mechanism 46.
  • the non-adhesion area 10a of each of the adhesive labels 10 can be brought into and out of contact with the residual section 30b.
  • the first adhesion areas 10b, 10c are bonded respectively to a front peel-off section 30aa and to a rear peel-off section 30ab, with the residual section 30b being interposed therebetween, and the second adhesion areas 1Od, 1Oe are disposed over the boundaries between the residual section 30b and the peel-off sections 30aa, 30ab.
  • the section of the protective film 30 that is to be peeled off first is referred to as the front peel-off section 30aa
  • the section of the protective film 30 that is to be peeled off subsequently is referred to as the rear peel-off section 30ab.
  • the overall length L of the adhesive label 10 is set to 100 mm
  • the width Ll of the first adhesion areas 10b, 10c is set to 30 mm
  • the width L2 of the second adhesion areas 1Od, 1Oe is set to 5 mm
  • the width L3 of the non-adhesion area 10a is set to 30 mm.
  • the adhesive label bonding mechanism 40 includes first and second label supply mechanisms 58a, 58b for supplying adhesive labels 10 to interconnect the front peel-off section 30aa and the rear peel-off section 30ab, in order to leave the residual section 30b of the protective film 30 between the glass substrates 24.
  • the first and second label supply mechanisms 58a, 58b are disposed on respective transversely opposite sides of the photosensitive web 22. As shown in FIG. 6, each of the first and second label supply mechanisms 58a, 58b includes a rotational shaft 66, which is rotatable by a motor 64.
  • the peel-off sheet 14 with adhesive labels 10 applied thereto is fed horizontally while being guided by a plurality of guide rollers 68, and then is bent at a sharp angle by a bending member 70.
  • the peel- off sheet 14 is guided by guide rollers 72 and wound onto a takeup shaft 74, which is rotated by a motor 76.
  • First and second label receiving mechanisms 78a, 78b are disposed near the respective first and second label supply mechanisms 58a, 58b, upwardly of the respective bending members 70.
  • the first and second label receiving mechanisms 78a, 78b include respective horizontal cylinders 80, which are disposed respectively above the bending members 70 and extend horizontally.
  • the horizontal cylinders 80 have respective rods 82 that extend toward each other and are fixed to respective vertical cylinders 84, which extend vertically.
  • the vertical cylinders 84 have respective downwardly extending rods 86 with suction pads 88 mounted respectively thereon.
  • the suction pads 88 are capable of producing a suction force that is large enough to attract and hold each adhesive label 10 from a label surface thereof, which is opposite to the adhesive surface thereof, and to peel the adhesive label 10 off from the peel-off sheet 14.
  • the label bonding mechanism 40 includes first and second label distributing mechanisms 90a, 90b for receiving the respective adhesive labels 10 held by the first and second label receiving mechanisms 78a, 78b from the adhesive surfaces thereof.
  • the first and second label distributing mechanisms 90a, 90b are movable in the direction indicated by the arrow B, along the surface of the photosensitive web 22.
  • the first and second label distributing mechanisms 90a, 90b have respective guide members 92, which extend coaxially in the direction indicated by the arrow B.
  • Motors 94 are mounted on respective ends of the guide members 92.
  • a movable base 96 is coupled to each of the motors 94 by a ball screw, not shown.
  • a vertically extending cylinder 98 is mounted on the movable base 96, and a suction base 100 is mounted on the lower end of the cylinder 98, .for undergoing vertical movement in unison therewith over a predetermined vertical distance.
  • Suction pads 102a, 102b for attracting two adhesive labels 10 are mounted on the upper surface of the suction base 100.
  • the suction pads 102a, 102b are positionable in a vertically confronting relation to the suction pads 88 of the first and second label receiving mechanisms 78a, 78b.
  • a frame 104 is mounted on the movable table 52.
  • Plural label bonding mechanisms 108 are mounted on the frame 104 by an attachment bar 106.
  • 12 to 18 positionally adjustable label bonding mechanisms 108 are installed on the attachment bar 106.
  • each of the label bonding mechanisms 108 comprises a vertically extending cylinder 110 with a suction pad 112 mounted on the lower end thereof.
  • the suction pad 112 has a suction surface facing vertically downwardly, in order to attract and hold the label surface of the adhesive label 10, which is attracted and held by the suction base 100 of each of the first and second label distributing mechanisms 90a, 90b, and then bond the adhesive label 10 to a bonding position on the photosensitive web 22.
  • the movable table 52 includes a moving unit 114, which is movable in the direction indicated by the arrow A upon movement of the photosensitive web 22, when partially cut regions 34 are formed by the partial cutter 36 and adhesive labels 10 are bonded by the label bonding mechanisms 108.
  • the moving unit 114 has a pair of motors 116 which, when energized, install a movable base 118, movable in the direction indicated by the arrow A, on the movable table 52.
  • the movable table 52 is supported by the moving unit 114.
  • a base 120, on which the first and second label supply mechanisms 58a, 58b are mounted, can be adjusted in position by a pair of movable members 122 (see FIG. 4) in the direction indicated by the arrow A.
  • the dancer mechanism 42 includes a pair of swingable dancer rollers 130.
  • the peeling mechanism 44 which is disposed downstream of the dancer mechanism 42, has a suction drum 132 that eliminates variations of the tension to which the supplied photosensitive web 22 is subjected, thereby stabilizing the tension of the photosensitive web 22 when the photosensitive web 22 is subsequently laminated.
  • the peeling mechanism 44 also includes a protective film takeup unit 134 for peeling the protective film 30 off from the photosensitive web 22, except for the residual sections 30b thereof,- and winding the peeled-off protective film 30.
  • the protective film takeup unit 134 is disposed closely to the suction drum 132.
  • the joining mechanism 46 includes a pair of vertically spaced laminating rubber rollers 136a, 136b that can be heated to a predetermined temperature.
  • the joining mechanism 46 also includes a pair of backup rollers 138a, 138b, which are held in rolling contact with the rubber rollers 136a, 136b, respectively.
  • the backup roller 138b is pressed against the rubber roller 136b by a pressing cylinder 140.
  • the glass substrates 24 are fed along a substrate feed path 142, extending from the joining mechanism 46 and through the web cutting mechanism 48, in the direction indicated by the arrow C.
  • the web reel-out mechanism 32 accommodates therein the photosensitive web roll 22a, whereby the photosensitive web 22 is reeled out from the photosensitive web roll 22a.
  • the photosensitxve web 22 is fed to the partial cutter 36, and then is stopped at a predetermined position, or is fed at a low speed.
  • the running base 54 moves in the direction indicated by the arrow Bl, thereby displacing the circular blades 56a, 56b transversely across the photosensitive web 22.
  • the circular blades 56a, 56b cut into both the protective film 30 ⁇ and the photosensitive resin layer 28, simultaneously, forming two partially cut regions 34.
  • the photosensitive web 22 now has a front peel-off section 30aa and a rear peel-off section 30ab, with the residual section 30b interposed therebetween (see FIG. 2) .
  • adhesive label rolls 12 are mounted on respective rotational shafts 66 of the first and second label supply mechanisms 58a, 58b.
  • the rotational shafts 66 are rotated by motors 64 to feed the paper peel-off sheets 14 together with the adhesive labels 10 from the adhesive label rolls 12.
  • the peel-off sheets 14 and the adhesive labels 10 After the peel-off sheets 14 and the adhesive labels 10 have been fed horizontally while being guided by the guide rollers 68, the peel-off sheets 14 and the adhesive labels 10 are bent at a sharp angle by the bending members 70. Therefore, the ends of the adhesive labels 10 are peeled off from the peel-off sheets 14, and the adhesive labels 10 are attracted and held by suction pads 88 of the first and second label receiving mechanisms 78a, 78b (see FIG. 9).
  • the bending member 70 shown in FIG. 9 is displaced in the direction indicated by the arrow B2 , thereby peeling the adhesive label 10 off from the peel-off sheet 14.
  • the suction pad 88 is lifted by the vertical cylinder 84, attracts the label surface of the adhesive label 10, and holds the adhesive label 10 off the peel-off sheet 14.
  • the peel-off sheet 14 is bent at a sharp angle by the bending member 70, and is guided by the guide rollers 72 to the takeup shaft 74.
  • the takeup shaft 74 is rotated by motor 76 so as to wind the peel-off sheet 14 around the takeup shaft 74 (see FIG. 6).
  • each suction pad 88 is lifted while attracting and holding the label surface of the adhesive label 10, after which the horizontal cylinder 80 is actuated.
  • the suction pad 88 is moved in unison with the vertical cylinder 84 in the direction indicated by the arrow B, and is placed upwardly from each of the suction bases 100 of the first and second label distributing mechanisms 90a, 90b (see FIG. 10).
  • the cylinder 98 is actuated to elevate the suction base 100.
  • the suction base 100 begins to attract the adhesive label 10, whereupon the suction pad 88 releases the adhesive label 10. Therefore, the adhesive label 10, which has been attracted by the suction pad 88, has the adhesive surface thereof attracted and held by the suction pad 102a of the suction base 100. At this time, the suction pad 102a attracts and holds both the first and second adhesion areas 10b, 10c, as well as the non-adhesion area 10a.
  • the first and second label receiving mechanisms 78a, 78b After the first and second label receiving mechanisms 78a, 78b have transferred respective adhesive labels 10 to the suction pads 102a of the suction bases 100, the first and second label receiving mechanisms 78a, 78b receive additional subsequent adhesive labels 10 from the first and second label supply mechanisms 58a, 58b.
  • the adhesive labels 10, which are attracted and held by the suction pads 88 of the first and second label receiving mechanisms 78a, 78b, are transferred to the suction pads 102b of the suction bases 100 of the first and second label distributing mechanisms 90a, 90b, in the same manner as described above.
  • first and second label distributing mechanisms 90a, 90b two adhesive labels are attracted and held by respective suction bases 100. Thereafter, the motor 94 is energized to displace the movable base 96 along the guide member 92 in the direction indicated by the arrow B (see FIG. 11). After the suction base 100 has been positioned in alignment with the suction pad 112 of one of the label bonding mechanisms 108, the cylinder 98 is actuated to lift the suction base 100.
  • the adhesive label 10 which is attracted and held by the suction pad 102a of the suction base 100, has the label surface thereof held against the suction pad 112.
  • the suction pad 112 begins to attract the adhesive label 10, whereupon the suction pad 102a releases the adhesive label 10.
  • the adhesive label 10 is thus transferred from the suction pad 102a to the suction pad 112.
  • the suction base 100 then is positioned in alignment with another label bonding mechanism 108, and the adhesive label 10, which is attracted and held by the suction pad 102b of the suction base 100, is transferred to the suction pad 112 of the other label bonding mechanism 108.
  • the suction pads 112 of the label bonding mechanisms 108 attract and hold label surfaces of the adhesive labels 10. Then, the first and second label distributing mechanisms 90a, 90b are retracted into given retracted positions.
  • the partial cutter 36 is positioned in a retracted position, at a stroke end in the direction indicated by the arrow Bl, or at a stroke end in the direction indicated by the arrow B2. Then, when the photosensitive web 22 is fed at a low speed in the direction indicated by the arrow A, motors 116 of the moving unit 114 are energized so as to displace the movable table 52 in synchronism with the photosensitive web 22 in the direction indicated by the arrow A through the movable bases 118.
  • the cylinder 110 is actuated to lower the suction pad 112, so as to bond the adhesive label 10, which is attracted and held by the suction pad 112, at a predetermined position on the photosensitive web 22.
  • the adhesive label 10 is firmly bonded to the front peel-off section 30aa and the rear peel-off section 30ab, across the residual section 30b of the protective film 30.
  • the photosensitive web 22 is isolated by the dancer mechanism 42., so as to prevent variations of the tension to which the supplied photosensitive web 22 is subjected, and then the photosensitive web 22 is continuously fed to the peeling mechanism 44.
  • the peeling mechanism 44 as shown in FIG. 12, the base film 26 of the photosensitive web 22 is attracted to the suction drum 132, while the protective film 30 is peeled off from the photosensitive web 22, leaving the residual sections 30b on the photosensitive resin layer 28.
  • the peeled-off protective film 30 is wound onto the protective film takeup unit 134 (see FIG. 2).
  • the photosensitive web 22 is fed to the joining mechanism 46.
  • Glass substrates 24, which have been preheated, are charged successively at spaced intervals into the joining mechanism 46.
  • the glass substrate 24 enters between the rubber rollers 136a, 136b while in contact with the photosensitive resin layer 28 of the photosensitive web 22. Therefore, the glass substrate 24 is gripped at a given pressure between the rubber rollers 136a, 136b, whereby the photosensitive resin layer 28 is melted by heat and transferred, i.e., laminated, onto the glass substrate 24.
  • the photosensitive resin layer 28 is laminated onto the glass substrate 24 under the following conditions:
  • the photosensitive resin layer 28 is fed at a speed of 2.7 m/min. (1.0 m/min. to 10.0 m/min.), the rubber rollers 136a, 136b are heated to a temperature of 130° C (8O 0 C to 140 0 C) and have a hardness of 50 (40 to 90), the rubber rollers 136a, 136b apply a pressure (linear pressure) of 250 N/cm. (50 N/cm. to 400 N/cm.), and the photosensitive web 22 is subjected to a film tension of 120 N.
  • the glass substrate 24, with the transferred photosensitive resin layer 28 thereon has opposite ends covered with respective residual sections 30b. Therefore, when the photosensitive resin layer 28 is transferred onto the glass substrate 24, the rubber rollers 136a, 136b are not smeared by the photosensitive resin layer 28, but rather, the photosensitive resin layer 28 is cleanly bonded to the glass substrate 24 in the shape of a picture frame. After the photosensitive web 22 is severed, between one glass substrate 24 and a subsequent glass substrate 24, by the web cutting mechanism 48, the base film 26 and the residual section 30b are peeled off from the glass substrate 24, thereby producing a photosensitive laminated body 144.
  • each of the adhesive labels 10 is employed, each having a rectangular strip shape. As shown in FIG. 1, each of the adhesive labels 10 has first adhesion areas 10b, 10c disposed respectively on longitudinally opposite ends of a reverse side (adhesion side) of the adhesive label 10, which faces the peel-off sheet 14, and a non-adhesion area 10a positioned centrally between the first adhesion areas 10b, 10c, which is associated with the residual section 30b of the protective film 30. Each of the adhesive labels 10 also has second adhesion areas 1Od, 1Oe disposed between the first adhesion areas 10b, 10c and the non-adhesion area 10a.
  • the adhesive label 10 can easily join the front peel-off section 30aa and the rear peel-off section 30ab of the protective film 30 to each other, through the first adhesion areas 10b, 10c, while the second adhesion areas 1Od, 1Oe are disposed xn covering relation to boundaries between the residual section 30b and the peel-off sections 30aa, 30ab (see FIG. 3).
  • the adhesive label bonding mechanism 40 is of a simple and economical structure, and reliably bonds adhesive labels 10 without the need for positioning the adhesive labels 10 highly accurately with respect to the photosensitive web 22 along the partially out regions 34.
  • the adhesion force of the second adhesion areas 1Od, 1Oe is set to a level smaller than that of the first adhesion areas 10b, 10c. Specifically, the number of printing cycles for printing the adhesive-agent-dissolving ink is controlled for dissolving the adhesive agent of the second adhesion areas
  • the sticking force is measured using a probe tack tester (ASTM-D-2979 ) , which operates as follows: A probe of SUS, having a diameter of 5 mm, is loaded by a hollow cylindrical weight to press its tip end against a glued surface. After the tip end of the probe has been held against the glued surface for a predetermined period of time, the probe is peeled off from the glued surface. The tack of the glued surface is measured when the probe is peeled off from the glued surface.
  • the sticking force of the second adhesion areas 1Od, 1Oe is represented by 800 g
  • the sticking force of the first adhesion areas 10b, 10c is represented by 1170 g.
  • the second adhesion areas 1Od, 1Oe may be bonded in relatively flexible positions in the feeding direction with respect to the partially cut regions 34, so that the adhesive labels 10 do not need to be bonded with strict accuracy.
  • the second adhesion areas 1Od, 1Oe need not be fabricated with strict accuracy either, and hence, the adhesive labels 10 can be manufactured at a reduced cost.
  • the adhesive labels 10 are not limited to having a rectangular strip shape, but may have rounded opposite ends, or may have a central section with a mesh structure or being reduced or increased in width, insofar as such configurations do not obstruct joining of the peel-off sections of the protective film 30.
  • an adhesive label roll 12 with the adhesive labels 10 applied at spaced intervals to an elongate peel-off sheet 14, is employed.
  • the first and second label receiving mechanisms 78a, 78b are operated to attract a desired number of adhesive labels 10.
  • a new adhesive label roll 12 may be mounted in each of the first and second label supply mechanisms 58a, 58b. It is not necessary to use a plurality of adhesive label rolls, at respective bonding positions transversely spaced across the photosensitive web 22. As a result, the manufacturing apparatus 20 has a relatively simple structure overall, allowing new adhesive label rolls 12 to be installed with ease .
  • the first adhesion areas 10b, 10c and the second adhesion areas 1Od, 1Oe of the adhesive labels 10 have a layer of a water-soluble adhesive agent, taking into account environmental resistance, and to facilitate recycling of the adhesive labels 10.
  • the protective film 30 and the adhesive labels 10, which are wound by the protective film takeup unit 134 of the peeling mechanism 44, can easily be separated from each other when placed in water, warm water, alkaline water, or the like. Further, if the first adhesion areas 10b, 10c and the second adhesion areas 1Od, 1Oe employ a heat-peelable adhesive agent, the protective film 30 and the adhesive labels 10 can easily be separated from each other upon heating. If the adhesive labels 10 and the protective film 30 are made of the same resin material and employ the same water-soluble adhesive agent, then the adhesive labels 10 and the protective film 30 do not have to be separated when they are discarded or recycled, thereby simplifying discarding and recycling operations.
  • the adhesive labels 10 are made of paper (clean paper if handled in a clean room), non-woven fabric, or the like, then the adhesive labels 10 can be manufactured quite inexpensively and can be easily recycled. Since the base material of the adhesive labels 10 is heat-shrinkable, the adhesive labels 10 can easily be peeled off with heat during a reprocessing cycle.
  • a manufacturing apparatus 20 has been illustrated for thermally transferring the photosensitive resin layer 28 of the single elongate photosensitive web 22 to the glass substrate 24.
  • the present invention is not limited to the illustrated manufacturing apparatus 20.
  • the principles of the present invention are also applicable to other manufacturing apparatuses capable of thermally transferring photosensitive resin layers of two or more elongate photosensitive webs in a parallel relationship to the same glass substrate.

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Abstract

An adhesive label (10) has a non-adhesion area (10a), which has no adhesion force or a weak adhesion force, and which can be brought into and out of contact with each of residual sections (30b), first adhesion areas (10b, 10c) disposed respectively on opposite ends of the adhesive label (10) in a peel-off direction, and which are bonded to peel-off sections (30aa, 30ab) with the residual section (30b) interposed therebetween, and second adhesion areas (10d, 10e) positioned in covering relation to boundaries between the peel-off sections (30aa) and the residual section (30b). The second adhesion areas (10d, 10e) have an adhesion force which is weaker than that of the first adhesion areas (10b, 10c).

Description

DESCRIPTION ADHESIVE LABEL AND ADHESIVE LABEL ROLL '
Technical Field The present invention relates to an adhesive label bonded to a film having an alternate array of peel-off and residual sections joining the peel-off sections, and to an adhesive label' roll having such adhesive labels.
Background Art
Substrates for use in liquid-crystal panels, printed wiring boards, and PDPs include a photosensitive sheet (photosensitive web) having a photosensitive material layer (photosensitive resin layer) applied thereon to the surface of the substrate. The photosensitive sheet comprises a photosensitive material layer and a protective film (cover film) that are successively laminated onto a flexible plastic support .
An applying apparatus used to apply the photosensitive sheet to the substrate operates as follows: Substrates, such as glass substrates, resin substrates, or the like, are fed at predetermined spaced intervals . Lengths of a protective film are peeled off from the photosensitive sheet in alignment with respective areas of the photosensitive material layer, which are in turn applied to the substrate.
Japanese Laid-Open Patent Publication No. 2001-6995, for example, discloses a film applying process. According to the disclosed film applying process, as shown in FIG. 15 of the accompanying drawings , a multilayer film 1 changes its direction of travel around a direction changing roll 2, which is disposed closely to a cover film peeling mechanism 3. The multilayer film 1 comprises a laminated assembly made up of a base film Ia, a resist film Ib, and a cover film Ic. The cover film Ic has perforations Ie defined therein at predetermined spaced intervals .
The cover film peeling mechanism 3 has an adhesive tape supply roll 4a for supplying an adhesive tape 4, an adhesive tape cutter 5 for cutting off the adhesive tape 4, an adhesive tape pressing roll 6 for pressing the adhesive tape 4 against the cover film Ic, an adhesive tape holding base 7 for holding the adhesive tape 4 under a vacuum, and a cover film takeup roll 8 for winding the cover film Ic as it is peeled off from the multilayer film 1. A holder roll 9a for holding the cover film Ic and a control roll 9b are disposed between the cover film takeup roll 8 and the adhesive tape pressing roll 6. The cover film Ic, which has just been peeled off from the multilayer film 1 , has a trailing end to which the leading end of the adhesive tape 4 is applied. When the cover film Ic is wound by the cover film takeup roll 8, it pulls the adhesive tape 4 out of the adhesive tape supply roll 4a. As the multilayer film 1 is fed, perforations Ie positioned between the cover film Ic and a remaining cover film Id move toward a position immediately above the adhesive tape pressing roll 6. Immediately before the perforations Ie reach that position, the adhesive tape pressing roll 6 is lifted to apply the adhesive tape 4 to the leading end of the cover film Ic. While the adhesive tape 4 is attracted to the adhesive tape holding base 7 under a vacuum, the adhesive tape holding base 7 is lowered to cause the adhesive tape cutter 5 to cut off the adhesive tape 4. Therefore, the adhesive tape 4 is applied to the cut-off cover film Ic and to the cover film Ic on the multilayer film 1 across the remaining cover film Id. Therefore, the cover film Ic is peeled off from the multilayer film 1, while the remaining cover film Id remains on the multilayer film 1.
The above apparatus for performing the conventional film applying process is considerably complex in structure, because the adhesive tape pressing roll 6 and the adhesive tape holding base 7 are angularly displaced. Further, the direction changing roll 2 cannot firmly hold the multilayer film 1. Especially, when the cover film Ic is peeled off from the multilayer film 1, peeling shocks tend to be applied to the multilayer film 1. Consequently, a laminated section of a substrate, which is positioned downstream from the film applying apparatus, is liable to develop striped defective regions thereon. Since the adhesive tape pressing roll 6 presses the adhesive tape 4 in linear contact therewith, the adhesive tape 4 cannot firmly be applied to the cover film Ic with a sufficient bonding strength. In addition, the film applying process requires tedious and time-consuming maintenance for removing the adhesive material from the adhesive tape cutter 5. The film applying apparatus requires a plurality of cover film peeling mechanisms 3 arrayed in the transverse direction of the multilayer film 1, because a plurality of adhesive tapes 4 need to be applied to the cover film Ic at spaced positions along the transverse direction of the multilayer film 1, in order to reliably peel off the cover film Ic from the multilayer film 1. Accordingly, the film applying apparatus is large in overall size and costly to manufacture. Furthermore, a plurality of adhesive tape supply rolls 4a must be installed at spaced intervals along the transverse direction of the multilayer film 1.
Replacing the adhesive tape supply rolls 4a is also a considerably complex process.
It has been proposed to use an adhesive label having a predetermined shape, e.g., a rectangular strip shape, instead of the adhesive tape 4 discussed above. For example, Japanese Laid-Open Patent Publication No. 5-173487 discloses an adhesive label comprising a base in the form of a heat-shrinkable plastic film or sheet with a layer of an adhesive agent disposed on one surface of the base, wherein the adhesive agent can have its adhesion force lowered by contact with warm water.
The adhesive label does not require use of the adhesive tape cutter 5 , and hence maintenance of the tape cutter is not needed. When the unwanted cover film Ic wound by the cover film takeup roll 8 is discarded, the adhesive label can easily be peeled off from the cover film Ic simply by being immersed in warm water.
However, if the cover film Ic is peeled off using the above adhesive label, as shown in FIG. 15, then only the opposite ends of the adhesive label need to be applied to the cover film Ic. Consequently, swingable structures corresponding to the adhesive tape pressing roll 6 and the adhesive tape holding base 7 are required, making the overall adhesive label applying mechanism considerably complex .
Disclosure of Invention
It is a general object of the present invention to provide an adhesive label and an adhesive label roll, which allow a film to be reliably and efficiently peeled off with a simple facility, and wherein the adhesive label and adhesive label roll can be easily handled.
The present invention concerns an adhesive label bonded to a web, having alternately arranged peel-off sections and residual sections. The adhesive label joins the peel-off sections to each other. The adhesive label includes a non-adhesion area arranged centrally on an adhesion surface thereof, which is to be bonded to the peel-off sections, wherein the non- adhesion area has no adhesion force or merely a weak adhesion force, and can be brought into and out of contact with each of the residual sections. First adhesion areas are disposed respectively on opposite ends of the adhesion surface in a peel-off direction, the first adhesion areas being bonded to the peel-off sections, with the residual section interposed therebetween. Second adhesion areas are disposed between the non-adhesion area and the first adhesion areas, the second adhesion areas being positioned in covering relation to boundaries between the peel-off sections and the residual section, the second adhesion areas having an adhesion force weaker than that of the first adhesion areas.
Preferably, the adhesive label is made of a heat- shrmkable material or from the same resin material as the film. An adhesive label made of such a material can be reprocessed easily. Preferably, the adhesive label has a water-soluble adhesive or a heat-peelable adhesive. Such an adhesive can be processed easily and has increased environmental resistance.
The present invention further concerns an adhesive label roll having a plurality of adhesive labels, each of the adhesive labels being bonded to a web having alternately arranged peel-off sections and residual sections for joining the peel-off sections to each other, and a peel-off sheet wound into a roll, wherein the adhesive labels are removably applied to the peel-off sheet at predetermined spaced xntervals .
According to the present invention, since the adhesive labels are used instead of an ordinary elongate adhesive tape, a complex tape cutting mechanism is not required, and hence no cutter maintenance is needed. Consequently, the adhesive labels can reliably be applied using a simple and economical arrangement .
The adhesive label has second adhesion areas disposed between the non-adhesion area and the first adhesion areas, wherein the second adhesion areas have an adhesion force which is weaker than that of the first adhesion areas. The second adhesion areas are positioned in covering relation to boundaries between the peel-off sections and the residual section. Therefore, insofar as the boundaries between the peel-off sections and the residual section are present within the width of the second adhesion areas, the accuracy with which the adhesive label is bonded, as well as the accuracy with which the adhesive label is fabricated, do not need to be strict. As a result, the mechanism for bonding the adhesive labels is simplified, and the adhesive labels can be manufactured at a reduced cost.
Furthermore, since an adhesive label roll having adhesive labels applied to a peel-off sheet is used, the adhesive labels can be handled with increased ease. A label bonding mechanism for bonding the adhesive labels is relatively simple in structure, because the adhesive labels need only to be peeled off from the adhesive label roll. The above and other objects, features, and advantages of the present invention will become more apparent from the following description when taken in conjunction with accompanying drawings in which a preferred embodiment of the present invention is shown by way of illustrative example.
Brief Description of Drawings
FIG. 1 is a perspective view of an adhesive label roll having a plurality of adhesive labels according to the present invention;
FIG. 2 is a schematic view of a manufacturing apparatus employing the adhesive label roll;
FIG. 3 is a fragmentary cross-sectional view of an elongate photosensitive web used in the manufacturing apparatus;
FIG. 4 is a front elevational view of an adhesive label bonding mechanism provided within the manufacturing apparatus ;
FIG. 5 is a plan view of the adhesive label bonding mechanism;
FIG. 6 is a fragmentary perspective view of the adhesive label bonding mechanism;
FIG. 7 is a side elevational view of the adhesive label bonding mechanism; FIG. 8 is a fragmentary plan view of the elongate photosensitive web having adhesive labels applied thereto;
FIG. 9 is an enlarged fragmentary front elevational view showing the manner in which the adhesive label bonding mechanism operates;
FIG. 10 is an enlarged fragmentary front elevational view showing the manner in which the adhesive label bonding mechanism operates;
FIG. 11 is an enlarged fragmentary front elevational view showing the manner in which the adhesive label bonding mechanism operates ;
FIG. 12 is a fragmentary side elevational view showing the manner in which a protective film is peeled off from the elongate photosensitive web;
FIG. 13 is a fragmentary cross-sectional view of glass substrates to which a photosensitive resin layer is transferred; FIG. 14 is a diagram showing the relationship between the adhesive agent dissolving level (%) and the adhesive force; and
FIG. 15 is a schematic side elevational view of a conventional film applying apparatus .
Best Mode for Carrying Out the Invention
FIG. 1 shows in perspective an adhesive label roll 12 having a plurality of adhesive labels 10 according to the present invention. FIG. 2 shows schematically a manufacturing apparatus 20, which employs the adhesive label roll 12.
As shown in FIG. 1, the adhesive labels 10, each having a rectangular strip shape, are applied at spaced intervals to an elongate paper peel-off sheet 14, which is rolled into an adhesive label roll 12.
Each of the adhesive labels 10 is made of synthetic paper, primarily composed of polypropylene (PP) , for example, having a thickness of 80 μm. Each of the adhesive labels 10 has a non-adhesion area 10a positioned centrally on a reverse side (adhesion side) thereof, facing the peel- off sheet 14, wherein the non-adhesion area 10a is not coated with an adhesive, and has no adhesion force or only a weak adhesion force. Each of the adhesive labels 10 also includes first adhesion areas 10b, 10c disposed on opposite ends of the adhesive label 10 in a peel-off direction, i.e., on longitudinally opposite ends of the reverse side facing the peel-off sheet 14, and second adhesion areas 1Od, 1Oe disposed between the non-adhesion area 10a and the first adhesion areas 10b, 10c. The second adhesion areas 1Od, 1Oe have a weaker adhesion force than that of the first adhesion areas 10b, 10c. Each of the first and second adhesion areas 10b, 10c has a layer of a water-soluble acrylic adhesive agent deposited to a thickness of 5 μm, the acrylic adhesive agent being dissolvable in water, warm water, alkaline water, or the like. The first and second adhesion areas 10b, 10c have a bonding strength set to a range from 1 to 2N/15 mm width (200C) for 180° peeling with respect to polypropylene, which is the material that makes up a protective film 30, to be described later on. The first and second adhesion areas 10b, 10c may employ a heat-peelable adhesive agent, which can easily be peeled off with heat (see Japanese Laid-Open Patent Publication No. 7-219439, for example). The non-adhesion area 10a is formed by processing the adhesive agent of the first adhesion areas 10b, 10c in order to produce an area having no or almost no sticking force, i.e., by dissolving the adhesive agent of the first adhesion areas 10b, 10c. The adhesive agent can be dissolved by printing an adhesive-agent-dissolving ink on the reverse side of the adhesive label 10. The printing process is effective to increase the accuracy at which the adhesive label 10 is shaped, as well as to reduce the cost for producing the adhesive label 10. The second adhesion areas 1Od, 1Oe are formed by changing the halftone-dot shape or halftone-dot size of the printing plate that prints the adhesive-agent-dissolving ink, in order to establish a desired sticking force or sticking shape. The adhesive-agent-dissolving ink may be printed by flexography, offset printing, letterpress printing, silk screen printing, or the like.
If the non-adhesion area 10a cannot fully be formed in a single printing cycle of the adhesive-agent-dissolving ink, then the adhesive-agent-dissolving ink may be printed repeatedly in a plurality of cycles. The second adhesion areas 1Od, 1Oe and the non-adhesion area 10a may successively be formed by changing the thickness and width at which the adhesive-agent-dissolving ink is printed during the first and second printing cycles. Specifically, the second adhesion areas 1Od, 1Oe may be formed in the first printing cycle, and the non-adhesion area 10a may be formed in the second printing cycle.
Instead of printing the adhesive-agent-dissolving ink, a thin PET (polyethylene terephthalate) film or PP film may be applied as the non-adhesion area 10a or the second adhesion areas 1Od, 1Oe. FIG. 3 shows in cross section a photosensitive web 22, which is employed in the manufacturing apparatus 20. The photosensitive web 22 comprises a laminated assembly made up of a flexible base film (support) 26, a photosensitive resin layer (photosensitive material layer) 28 disposed on the flexible base film 26, and a protective film 30 disposed on the photosensitive resin layer 28.
As shown in FIG. 2, the manufacturing apparatus 20 comprises a web reel-out mechanism 32 accommodating a photosensitive web roll 22a therein, in the form of a rolled photosensitive web 22, wherein the photosensitive web 22 is reeled out from the photosensitive web roll 22a, a partial cutter 36 for forming partially cut regions 34 (see FIG. 3), which are transversely severable in the protective film 30 of the photosensitive web 22 that is reeled out from the photosensitive web roll 22a, a label bonding mechanism 40 for bonding adhesive labels 10 (see FIG. 1), a dancer mechanism 42 for changing the feed mode of the photosensitive web 22 from a tact mode, i.e., an intermittent feed mode, to a continuous feed mode, a peeling mechanism 44 for peeling a predetermined length of the protective film 30 from the photosensitive web 22, a joining mechanism 46 for joining an exposed area of the photosensitive resin layer 28, from which a predetermined length of the protective film 30 has been peeled off, to a glass substrate 24, and a web cutting mechanism 48 for cutting off the photosensitive web 22 between respective glass substrates 24. Another web cutting mechanism 48a, which is used when the manufacturing apparatus 20 begins to operate, is disposed upstream of the web cutting mechanism 48.
The partial cutter 36 is disposed near the label bonding mechanism 40 and downstream of a roller pair 50, for calculating the diameter of the photosensitive web roll 22a accommodated in the web reel-out mechanism 32. As shown in FIGS. 4 through 6, the partial cutter 36 has a guide member 53 fixed to a movable table 52, which is movable in the direction indicated by the arrow A, and which extends in the direction indicated by the arrow B transversely across the photosensitive web 22.
As shown in FIGS. 5 through 7, a running base 54, which is movable in the direction indicated by the arrow B by an actuator comprising a motor and a ball screw or the like (not shown), is supported on the guide member 53. The running base 54 supports thereon a pair of circular blades 56a, 56b. The circular blades 56a, 56b move transversely across the photosensitive web 22 and simultaneously form two partially cut regions 34, respectively, in the photosensitive web 22 at respective given positions thereon, leaving a residual section 30b interposed therebetween.
The running base 54 can be placed selectively in two retracted positions, as indicated by the two-dot-and-dash- line positions in FIG. 4, which project outwardly from opposite edges of the photosensitive web 22 in the transverse direction. A suction base 57 is disposed below the running base 54 for attracting and holding the photosensitive web 22 when the circular blades 56a, 56b form the partially cut regions 34 in the photosensitive web 22. The suction base 57 is vertically movably mounted on a movable table 52 through vertically moving cylinders 55.
As shown in FIG. 3, the partially cut regions 34 must be formed in and across at least the protective film 30. Actually, the circular blades 56a, 56b are set to a given cutting depth, which is large enough to cut into the photosensitive resin layer 28 in order to reliably cut off the protective film 30. The circular blades 56a, 56b may be fixed against rotation and moved transversely across the photosensitive web 22 to form partially cut regions 34, or the circular blades 56a, 56b may be rotated without slippage on the photosensitive web 22 and moved transversely across the photosensitive web 22 to form the partially cut regions 34. Each of the circular blades 56a, 56b may be replaced with a laser beam or an ultrasonic cutter, a knife blade, or a pushing blade (Thompson blade), for example. The partial cutter 36 has a single circular blade, and two partial cutters 36 may be provided at a spaced interval in the direction indicated by the arrow A in which the photosensitive web 22 is fed.
The partially cut regions 34 formed in the protective film 30 serve to set a spaced interval between two adjacent glass substrates 24. For example, such partially cut regions 34 are formed in the protective film 30 at positions that are spaced 10 mm inwardly from respective edges of the glass substrates 24. The section of the protective film 30, which is interposed between the partially cut regions 34, serves to prevent the laminating rollers (i.e., rubber rollers 136a, 136b to be described later on) from smearing when the photosensitive resin layer 28 is applied to the glass substrate 24 by the joining mechanism 46. As shown in FIGS. 3 and 8, the non-adhesion area 10a of each of the adhesive labels 10 can be brought into and out of contact with the residual section 30b. The first adhesion areas 10b, 10c are bonded respectively to a front peel-off section 30aa and to a rear peel-off section 30ab, with the residual section 30b being interposed therebetween, and the second adhesion areas 1Od, 1Oe are disposed over the boundaries between the residual section 30b and the peel-off sections 30aa, 30ab. As shown in FIG. 3, the section of the protective film 30 that is to be peeled off first is referred to as the front peel-off section 30aa, whereas the section of the protective film 30 that is to be peeled off subsequently is referred to as the rear peel-off section 30ab.
Specifically, if the distance between two adjacent partially cut regions 34 is 35 mm, for example, then, as shown in FIGS. 1 and 3, the overall length L of the adhesive label 10 is set to 100 mm, the width Ll of the first adhesion areas 10b, 10c is set to 30 mm, the width L2 of the second adhesion areas 1Od, 1Oe is set to 5 mm, and the width L3 of the non-adhesion area 10a is set to 30 mm.
As shown in FIG. 4, the adhesive label bonding mechanism 40 includes first and second label supply mechanisms 58a, 58b for supplying adhesive labels 10 to interconnect the front peel-off section 30aa and the rear peel-off section 30ab, in order to leave the residual section 30b of the protective film 30 between the glass substrates 24.
The first and second label supply mechanisms 58a, 58b are disposed on respective transversely opposite sides of the photosensitive web 22. As shown in FIG. 6, each of the first and second label supply mechanisms 58a, 58b includes a rotational shaft 66, which is rotatable by a motor 64. The adhesive label roll 12, in the form of a rolled elongate paper peel-off sheet 14 with adhesive labels 10 applied thereto, xs mounted on the rotational shaft 66. When the rotational shaft 66 rotates, the elongate peel-off sheet 14 with adhesive labels 10 applied thereto is unreeled from the adhesive label roll 12. The peel-off sheet 14 with adhesive labels 10 applied thereto, is fed horizontally while being guided by a plurality of guide rollers 68, and then is bent at a sharp angle by a bending member 70. After the adhesive labels 10 have been peeled off from the peel-off sheet -14, the peel- off sheet 14 is guided by guide rollers 72 and wound onto a takeup shaft 74, which is rotated by a motor 76.
First and second label receiving mechanisms 78a, 78b (see FIGS. 4 through 6) are disposed near the respective first and second label supply mechanisms 58a, 58b, upwardly of the respective bending members 70. The first and second label receiving mechanisms 78a, 78b include respective horizontal cylinders 80, which are disposed respectively above the bending members 70 and extend horizontally. The horizontal cylinders 80 have respective rods 82 that extend toward each other and are fixed to respective vertical cylinders 84, which extend vertically.
The vertical cylinders 84 have respective downwardly extending rods 86 with suction pads 88 mounted respectively thereon. The suction pads 88 are capable of producing a suction force that is large enough to attract and hold each adhesive label 10 from a label surface thereof, which is opposite to the adhesive surface thereof, and to peel the adhesive label 10 off from the peel-off sheet 14.
The label bonding mechanism 40 includes first and second label distributing mechanisms 90a, 90b for receiving the respective adhesive labels 10 held by the first and second label receiving mechanisms 78a, 78b from the adhesive surfaces thereof. The first and second label distributing mechanisms 90a, 90b are movable in the direction indicated by the arrow B, along the surface of the photosensitive web 22. The first and second label distributing mechanisms 90a, 90b have respective guide members 92, which extend coaxially in the direction indicated by the arrow B. Motors 94 are mounted on respective ends of the guide members 92. A movable base 96 is coupled to each of the motors 94 by a ball screw, not shown.
A vertically extending cylinder 98 is mounted on the movable base 96, and a suction base 100 is mounted on the lower end of the cylinder 98, .for undergoing vertical movement in unison therewith over a predetermined vertical distance. Suction pads 102a, 102b for attracting two adhesive labels 10 are mounted on the upper surface of the suction base 100. The suction pads 102a, 102b are positionable in a vertically confronting relation to the suction pads 88 of the first and second label receiving mechanisms 78a, 78b.
A frame 104 is mounted on the movable table 52. Plural label bonding mechanisms 108 are mounted on the frame 104 by an attachment bar 106. For example, 12 to 18 positionally adjustable label bonding mechanisms 108 are installed on the attachment bar 106.
As shown in FIGS. 6 and 7, each of the label bonding mechanisms 108 comprises a vertically extending cylinder 110 with a suction pad 112 mounted on the lower end thereof. The suction pad 112 has a suction surface facing vertically downwardly, in order to attract and hold the label surface of the adhesive label 10, which is attracted and held by the suction base 100 of each of the first and second label distributing mechanisms 90a, 90b, and then bond the adhesive label 10 to a bonding position on the photosensitive web 22. The movable table 52 includes a moving unit 114, which is movable in the direction indicated by the arrow A upon movement of the photosensitive web 22, when partially cut regions 34 are formed by the partial cutter 36 and adhesive labels 10 are bonded by the label bonding mechanisms 108. As shown in FIGS. 4 and 5, the moving unit 114 has a pair of motors 116 which, when energized, install a movable base 118, movable in the direction indicated by the arrow A, on the movable table 52. The movable table 52 is supported by the moving unit 114. A base 120, on which the first and second label supply mechanisms 58a, 58b are mounted, can be adjusted in position by a pair of movable members 122 (see FIG. 4) in the direction indicated by the arrow A.
As shown in FIG. 2, the dancer mechanism 42 includes a pair of swingable dancer rollers 130. The peeling mechanism 44, which is disposed downstream of the dancer mechanism 42, has a suction drum 132 that eliminates variations of the tension to which the supplied photosensitive web 22 is subjected, thereby stabilizing the tension of the photosensitive web 22 when the photosensitive web 22 is subsequently laminated. The peeling mechanism 44 also includes a protective film takeup unit 134 for peeling the protective film 30 off from the photosensitive web 22, except for the residual sections 30b thereof,- and winding the peeled-off protective film 30. The protective film takeup unit 134 is disposed closely to the suction drum 132. The joining mechanism 46 includes a pair of vertically spaced laminating rubber rollers 136a, 136b that can be heated to a predetermined temperature. The joining mechanism 46 also includes a pair of backup rollers 138a, 138b, which are held in rolling contact with the rubber rollers 136a, 136b, respectively. The backup roller 138b is pressed against the rubber roller 136b by a pressing cylinder 140. The glass substrates 24 are fed along a substrate feed path 142, extending from the joining mechanism 46 and through the web cutting mechanism 48, in the direction indicated by the arrow C.
Operations of the manufacturing apparatus 20 thus constructed shall be described below. The web reel-out mechanism 32 accommodates therein the photosensitive web roll 22a, whereby the photosensitive web 22 is reeled out from the photosensitive web roll 22a. The photosensitxve web 22 is fed to the partial cutter 36, and then is stopped at a predetermined position, or is fed at a low speed.
In the partial cutter 36, as shown in FIGS. 5 and 6, the running base 54 moves in the direction indicated by the arrow Bl, thereby displacing the circular blades 56a, 56b transversely across the photosensitive web 22. The circular blades 56a, 56b cut into both the protective film 30^ and the photosensitive resin layer 28, simultaneously, forming two partially cut regions 34. The photosensitive web 22 now has a front peel-off section 30aa and a rear peel-off section 30ab, with the residual section 30b interposed therebetween (see FIG. 2) .
In the adhesive label bonding mechanism 40, as shown in FIG. 6, adhesive label rolls 12 are mounted on respective rotational shafts 66 of the first and second label supply mechanisms 58a, 58b. The rotational shafts 66 are rotated by motors 64 to feed the paper peel-off sheets 14 together with the adhesive labels 10 from the adhesive label rolls 12.
After the peel-off sheets 14 and the adhesive labels 10 have been fed horizontally while being guided by the guide rollers 68, the peel-off sheets 14 and the adhesive labels 10 are bent at a sharp angle by the bending members 70. Therefore, the ends of the adhesive labels 10 are peeled off from the peel-off sheets 14, and the adhesive labels 10 are attracted and held by suction pads 88 of the first and second label receiving mechanisms 78a, 78b (see FIG. 9).
Then, the bending member 70 shown in FIG. 9 is displaced in the direction indicated by the arrow B2 , thereby peeling the adhesive label 10 off from the peel-off sheet 14. The suction pad 88 is lifted by the vertical cylinder 84, attracts the label surface of the adhesive label 10, and holds the adhesive label 10 off the peel-off sheet 14.
After the adhesive label 10 has been peeled off from the peel-off sheet 14, the peel-off sheet 14 is bent at a sharp angle by the bending member 70, and is guided by the guide rollers 72 to the takeup shaft 74. The takeup shaft 74 is rotated by motor 76 so as to wind the peel-off sheet 14 around the takeup shaft 74 (see FIG. 6). In the first and second label receiving mechanisms 78a, 78b, each suction pad 88 is lifted while attracting and holding the label surface of the adhesive label 10, after which the horizontal cylinder 80 is actuated. Therefore, the suction pad 88 is moved in unison with the vertical cylinder 84 in the direction indicated by the arrow B, and is placed upwardly from each of the suction bases 100 of the first and second label distributing mechanisms 90a, 90b (see FIG. 10).
Then, the cylinder 98 is actuated to elevate the suction base 100. The suction base 100 begins to attract the adhesive label 10, whereupon the suction pad 88 releases the adhesive label 10. Therefore, the adhesive label 10, which has been attracted by the suction pad 88, has the adhesive surface thereof attracted and held by the suction pad 102a of the suction base 100. At this time, the suction pad 102a attracts and holds both the first and second adhesion areas 10b, 10c, as well as the non-adhesion area 10a.
After the first and second label receiving mechanisms 78a, 78b have transferred respective adhesive labels 10 to the suction pads 102a of the suction bases 100, the first and second label receiving mechanisms 78a, 78b receive additional subsequent adhesive labels 10 from the first and second label supply mechanisms 58a, 58b. The adhesive labels 10, which are attracted and held by the suction pads 88 of the first and second label receiving mechanisms 78a, 78b, are transferred to the suction pads 102b of the suction bases 100 of the first and second label distributing mechanisms 90a, 90b, in the same manner as described above.
In the first and second label distributing mechanisms 90a, 90b, two adhesive labels are attracted and held by respective suction bases 100. Thereafter, the motor 94 is energized to displace the movable base 96 along the guide member 92 in the direction indicated by the arrow B (see FIG. 11). After the suction base 100 has been positioned in alignment with the suction pad 112 of one of the label bonding mechanisms 108, the cylinder 98 is actuated to lift the suction base 100. The adhesive label 10, which is attracted and held by the suction pad 102a of the suction base 100, has the label surface thereof held against the suction pad 112.
Then, the suction pad 112 begins to attract the adhesive label 10, whereupon the suction pad 102a releases the adhesive label 10. The adhesive label 10 is thus transferred from the suction pad 102a to the suction pad 112. The suction base 100 then is positioned in alignment with another label bonding mechanism 108, and the adhesive label 10, which is attracted and held by the suction pad 102b of the suction base 100, is transferred to the suction pad 112 of the other label bonding mechanism 108.
As described above, the suction pads 112 of the label bonding mechanisms 108 attract and hold label surfaces of the adhesive labels 10. Then, the first and second label distributing mechanisms 90a, 90b are retracted into given retracted positions. The partial cutter 36 is positioned in a retracted position, at a stroke end in the direction indicated by the arrow Bl, or at a stroke end in the direction indicated by the arrow B2. Then, when the photosensitive web 22 is fed at a low speed in the direction indicated by the arrow A, motors 116 of the moving unit 114 are energized so as to displace the movable table 52 in synchronism with the photosensitive web 22 in the direction indicated by the arrow A through the movable bases 118. At this time, in each of the label bonding mechanisms 108, the cylinder 110 is actuated to lower the suction pad 112, so as to bond the adhesive label 10, which is attracted and held by the suction pad 112, at a predetermined position on the photosensitive web 22.
Specifically, as shown in FIG. 8, the adhesive label 10 is firmly bonded to the front peel-off section 30aa and the rear peel-off section 30ab, across the residual section 30b of the protective film 30.
After a predetermined number of adhesive labels 10 have been bonded to ' the photosensitive web 22, the photosensitive web 22 is isolated by the dancer mechanism 42., so as to prevent variations of the tension to which the supplied photosensitive web 22 is subjected, and then the photosensitive web 22 is continuously fed to the peeling mechanism 44. In the peeling mechanism 44, as shown in FIG. 12, the base film 26 of the photosensitive web 22 is attracted to the suction drum 132, while the protective film 30 is peeled off from the photosensitive web 22, leaving the residual sections 30b on the photosensitive resin layer 28. The peeled-off protective film 30 is wound onto the protective film takeup unit 134 (see FIG. 2). At this time, inasmuch as the photosensitive web 22 is firmly held by the suction drum 132, shocks produced when the protective film 30 is peeled off from the photosensitive web 22 are not transferred to the photosensitive web 22 downstream of the suction drum 132. Consequently, such shocks are not transferred to the joining mechanism 46, and hence laminated sections of glass substrates 24 are effectively prevented from developing poor-quality regions. such as striped defective regions, or regions exhibiting irregular density, or the like.
After the protective film 30 has been peeled' off from the base film 26 by the peeling mechanism 44, thereby leaving the residual sections 30b on the photosensitive resin layer 28, the photosensitive web 22 is fed to the joining mechanism 46. Glass substrates 24, which have been preheated, are charged successively at spaced intervals into the joining mechanism 46. When charged into -the joining mechanism 46, the glass substrate 24 enters between the rubber rollers 136a, 136b while in contact with the photosensitive resin layer 28 of the photosensitive web 22. Therefore, the glass substrate 24 is gripped at a given pressure between the rubber rollers 136a, 136b, whereby the photosensitive resin layer 28 is melted by heat and transferred, i.e., laminated, onto the glass substrate 24.
The photosensitive resin layer 28 is laminated onto the glass substrate 24 under the following conditions: The photosensitive resin layer 28 is fed at a speed of 2.7 m/min. (1.0 m/min. to 10.0 m/min.), the rubber rollers 136a, 136b are heated to a temperature of 130° C (8O0C to 1400C) and have a hardness of 50 (40 to 90), the rubber rollers 136a, 136b apply a pressure (linear pressure) of 250 N/cm. (50 N/cm. to 400 N/cm.), and the photosensitive web 22 is subjected to a film tension of 120 N.
As shown in FIG. 13, the glass substrate 24, with the transferred photosensitive resin layer 28 thereon, has opposite ends covered with respective residual sections 30b. Therefore, when the photosensitive resin layer 28 is transferred onto the glass substrate 24, the rubber rollers 136a, 136b are not smeared by the photosensitive resin layer 28, but rather, the photosensitive resin layer 28 is cleanly bonded to the glass substrate 24 in the shape of a picture frame. After the photosensitive web 22 is severed, between one glass substrate 24 and a subsequent glass substrate 24, by the web cutting mechanism 48, the base film 26 and the residual section 30b are peeled off from the glass substrate 24, thereby producing a photosensitive laminated body 144.
According to the present embodiment, adhesive labels 10 are employed, each having a rectangular strip shape. As shown in FIG. 1, each of the adhesive labels 10 has first adhesion areas 10b, 10c disposed respectively on longitudinally opposite ends of a reverse side (adhesion side) of the adhesive label 10, which faces the peel-off sheet 14, and a non-adhesion area 10a positioned centrally between the first adhesion areas 10b, 10c, which is associated with the residual section 30b of the protective film 30. Each of the adhesive labels 10 also has second adhesion areas 1Od, 1Oe disposed between the first adhesion areas 10b, 10c and the non-adhesion area 10a.
Therefore, the adhesive label 10 can easily join the front peel-off section 30aa and the rear peel-off section 30ab of the protective film 30 to each other, through the first adhesion areas 10b, 10c, while the second adhesion areas 1Od, 1Oe are disposed xn covering relation to boundaries between the residual section 30b and the peel-off sections 30aa, 30ab (see FIG. 3). The adhesive label bonding mechanism 40 is of a simple and economical structure, and reliably bonds adhesive labels 10 without the need for positioning the adhesive labels 10 highly accurately with respect to the photosensitive web 22 along the partially out regions 34.
Specifically, as shown in FIG. 3, if the- distance h between the leading end of the second adhesion area 1Oe in the direction indicated by the arrow A and the corresponding partially cut region 34 is large, and the sticking force (adhesion force) of the second adhesion area 1Oe is also large, then when the peel-off sections 30aa, 30ab are peeled off through the adhesive label 10, a stick slip tends to occur. If the partially cut regions 34 have a crack produced when they are formed, then the photosensitive resin layer 28 is liable to peel due to vibrations caused by such stick slip. However, according to the present embodiment, the adhesion force of the second adhesion areas 1Od, 1Oe is set to a level smaller than that of the first adhesion areas 10b, 10c. Specifically, the number of printing cycles for printing the adhesive-agent-dissolving ink is controlled for dissolving the adhesive agent of the second adhesion areas
1Od, 1Oe. When the process of dissolving the adhesive agent of the non-adhesion area 10a is set to an adhesive agent dissolving level of 100 %, and the process of dissolving the adhesive agent of the first adhesion areas 10b, 10c is set to an adhesive agent dissolving level of 0 % , then a relationship, as shown in FIG. 14, between the adhesive agent dissolving level and the sticking force is achieved.
The sticking force is measured using a probe tack tester (ASTM-D-2979 ) , which operates as follows: A probe of SUS, having a diameter of 5 mm, is loaded by a hollow cylindrical weight to press its tip end against a glued surface. After the tip end of the probe has been held against the glued surface for a predetermined period of time, the probe is peeled off from the glued surface. The tack of the glued surface is measured when the probe is peeled off from the glued surface. If the process for dissolving the adhesive agent is performed on the second adhesion areas 1Od, 1Oe at an adhesive agent dissolving level of 25 %, then the sticking force of the second adhesion areas 1Od, 1Oe is represented by 800 g, whereas the sticking force of the first adhesion areas 10b, 10c is represented by 1170 g.
Therefore, even if the adhesion force of the second adhesion areas 1Od, 1Oe is reduced, and the distance h is increased, stick slip is effectively prevented from occurring when the peel-off sections 30aa, 30ab are peeled off through the adhesive label 10, and peeling of the photosensitive resin layer 28 is prevented.
The second adhesion areas 1Od, 1Oe may be bonded in relatively flexible positions in the feeding direction with respect to the partially cut regions 34, so that the adhesive labels 10 do not need to be bonded with strict accuracy. The second adhesion areas 1Od, 1Oe need not be fabricated with strict accuracy either, and hence, the adhesive labels 10 can be manufactured at a reduced cost.
The adhesive labels 10 are not limited to having a rectangular strip shape, but may have rounded opposite ends, or may have a central section with a mesh structure or being reduced or increased in width, insofar as such configurations do not obstruct joining of the peel-off sections of the protective film 30.
According to the present embodiment, an adhesive label roll 12, with the adhesive labels 10 applied at spaced intervals to an elongate peel-off sheet 14, is employed.
When the adhesive label roll 12 is fed to the label peel-off position, the first and second label receiving mechanisms 78a, 78b are operated to attract a desired number of adhesive labels 10. Once the adhesive label roll 12 has been consumed, a new adhesive label roll 12 may be mounted in each of the first and second label supply mechanisms 58a, 58b. It is not necessary to use a plurality of adhesive label rolls, at respective bonding positions transversely spaced across the photosensitive web 22. As a result, the manufacturing apparatus 20 has a relatively simple structure overall, allowing new adhesive label rolls 12 to be installed with ease .
The first adhesion areas 10b, 10c and the second adhesion areas 1Od, 1Oe of the adhesive labels 10 have a layer of a water-soluble adhesive agent, taking into account environmental resistance, and to facilitate recycling of the adhesive labels 10. The protective film 30 and the adhesive labels 10, which are wound by the protective film takeup unit 134 of the peeling mechanism 44, can easily be separated from each other when placed in water, warm water, alkaline water, or the like. Further, if the first adhesion areas 10b, 10c and the second adhesion areas 1Od, 1Oe employ a heat-peelable adhesive agent, the protective film 30 and the adhesive labels 10 can easily be separated from each other upon heating. If the adhesive labels 10 and the protective film 30 are made of the same resin material and employ the same water-soluble adhesive agent, then the adhesive labels 10 and the protective film 30 do not have to be separated when they are discarded or recycled, thereby simplifying discarding and recycling operations.
If the adhesive labels 10 are made of paper (clean paper if handled in a clean room), non-woven fabric, or the like, then the adhesive labels 10 can be manufactured quite inexpensively and can be easily recycled. Since the base material of the adhesive labels 10 is heat-shrinkable, the adhesive labels 10 can easily be peeled off with heat during a reprocessing cycle. In the present embodiment, a manufacturing apparatus 20 has been illustrated for thermally transferring the photosensitive resin layer 28 of the single elongate photosensitive web 22 to the glass substrate 24. However, the present invention is not limited to the illustrated manufacturing apparatus 20. The principles of the present invention are also applicable to other manufacturing apparatuses capable of thermally transferring photosensitive resin layers of two or more elongate photosensitive webs in a parallel relationship to the same glass substrate.
Although a certain preferred embodiment of the present invention has been shown and described in detail, it should be understood that various changes and modifications may be made to the disclosed embodiment without departing from the scope of the invention as set forth in the appended claims.

Claims

1. An adhesive label (10) being bonded to a web (22) having alternately arranged peel-off sections (30aa, 30ab) and residual sections (30b), said adhesive label joining the peel-off sections (30aa, 30ab) to each other, said adhesive label (10) comprising: a non-adhesion area (10a) disposed centrally on^an adhesion surface thereof that is to be bonded- to said peel- off sections (30aa), wherein said non-adhesion area (10a) has no adhesion force or a weak adhesion force, and wherein said non-adhesion area (10a) can be brought into and out of contact with each of said residual sections (30b); first adhesion areas (10b) disposed respectively on opposite ends of said adhesion surface in a peel-off direction, said first adhesion areas (10b) being bonded to said peel-off sections (30aa) with said residual section (30b) interposed therebetween; and second adhesion areas (1Od) disposed between said non- adhesion area (10a) and said first adhesion areas (10b), said second adhesion areas (1Od) being positioned in covering relation to boundaries between said peel-off sections (30aa) and said residual section (30b), said second adhesion areas (1Od) having an adhesion force which is weaker than that of said first adhesion areas (10b).
2. An adhesive label (10) according to claim 1, wherein said adhesive label (10) is made of a heat- shrinkable material.
3. An adhesive label (10) according to claim 1, wherein said adhesive label (10) is made of a same resin material as said web (22).
4. An adhesive label (10) according to any one., of claims 1 through 3, wherein said adhesive label (10) comprises a water-soluble adhesive.
5. An adhesive label (10) according to any one of claims 1 through 3, wherein said adhesive label (10) comprises a heat-peelable adhesive.
6. An adhesive label roll comprising: a plurality of adhesive labels (10) each being bonded to a web (22) having alternately arranged peel-off sections (30aa, 30ab) and residual sections (30b) that join the peel- off sections (30aa, 30ab) to each other; and a peel-off sheet (14) wound into a roll, said adhesive labels (10) being removably applied to said peel-off sheet (14) at predetermined spaced intervals thereon; said adhesive label (10) comprising: a non-adhesion area (10a) disposed centrally on an adhesion surface thereof that is to be bonded to said peel- off sections (30aa), wherein said non-adhesion area (10a) has no adhesion force or a weak adhesion force, and wherein said non-adhesion area (10a) can be brought into and out of contact with each of said residual sections (30b); first adhesion areas (10b) disposed respectively on opposite ends of said adhesion surface in a peel-off direction, said first adhesion areas (10b) being bonded to said peel-off sections (30aa) with said residual section (30b) interposed therebetween; and second adhesion areas (1Od) disposed between said non- adhesion area (10a) and said first adhesion areas (10b), said second adhesion areas (1Od) being positioned in covering relation to boundaries between said peel-off sections (30aa) and said residual section (30b), said second adhesion areas (1Od) having an adhesion force which is weaker than that of said first adhesion areas (10b).
7. An adhesive label roll according to claim 6, wherein said adhesive label (10) is made of a heat- shrinkable material.
8. An adhesive label roll according to claim 6, wherein said adhesive label (10) is made of a same resin material as said web (22).
9. An adhesive label roll according to any one of claims 6 through 8, wherein said adhesive label (10) comprises a water-soluble adhesive.
10. An adhesive label roll according to any one of claims 6 through 8, wherein said adhesive label (10) comprises a heat-peelable adhesive.
PCT/JP2006/319913 2005-10-04 2006-09-28 Adhesive label and adhesive label roll WO2007043421A1 (en)

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WO2007043421A9 (en) 2007-06-07
TW200733018A (en) 2007-09-01

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