Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D33/00—Details of, or accessories for, sacks or bags
  • B65D33/16—End- or aperture-closing arrangements or devices
  • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
  • B65D75/52—Details
  • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
  • B65D75/5805—Opening or contents-removing devices added or incorporated during package manufacture for tearing a side strip parallel and next to the edge, e.g. by means of a line of weakness
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D33/00—Details of, or accessories for, sacks or bags
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D33/00—Details of, or accessories for, sacks or bags
  • B65D33/16—End- or aperture-closing arrangements or devices
  • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
  • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
  • B65D33/2516—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor comprising tamper-indicating means, e.g. located within the fastener
  • B65D33/2533—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor comprising tamper-indicating means, e.g. located within the fastener the slide fastener being located between the product compartment and the tamper indicating means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D33/00—Details of, or accessories for, sacks or bags
  • B65D33/16—End- or aperture-closing arrangements or devices
  • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
  • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
  • B65D33/2575—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor the slide fastener providing access to the bag through a bag wall, e.g. intended to be cut open by the consumer

Definitions

• the present invention relates to an easily-openable packaging bag that allows one side of the bag to be easily torn by a predetermined width in a straight line by hand.
• the present invention relates to packaging bags used in foods, clothing, pharmaceuticals, miscellaneous goods and many other packaging fields.
• the sealed state is maintained at the distribution stage, and the sealed state can be reproduced as needed even after opening by consumers etc. It relates to an easily openable packaging bag with a zipper. Background technology>
• Sealable bags made of various synthetic resins are used in food, clothing, pharmaceuticals, miscellaneous goods, and many other packaging fields.When using the contents, break the bag in some way. It is necessary to take out the contents.
• flat sealed bags are configured to cut the open end of the bag using scissors, kitchen knives, knives, etc. to take out the filled contents, or without using these tools.
• a notch or a fine scar was applied to the seal end or bent portion of the bag, and the bag was opened from the start.
• a notch is provided at a seal portion, the bag is torn open from the notch as a starting point, and the contents are taken out from the opening of the torn bag.
• the contents are easily deformed or flat, such as Japanese confectionery and cookies, there is a problem that the contents are destroyed or deformed when tearing the bag.
• Japanese Patent Application Laid-Open No. 10-230971 discloses that a non-adhesive portion is formed from the end of the side to be sealed to the seal portion, and the non-adhesive portion is formed from the film end of the non-adhesive portion to the adhesive portion.
• Japanese Patent Application Laid-Open No. 2001-55248 discloses that a bag is a pillow wrapping bag, but two notches are provided at an interval on the joint seal portion, and the bag is circumferentially cut by tearing the joint seal portion between the notches. There has been proposed a method of opening the shape.
• the present invention can be realized only by relatively simple processing, and without reducing the seal strength of the packaging bag or the strength of the packaging bag itself, even though there is no possibility that the sealed portion may be peeled off at the distribution stage, but by hand. It is an object to propose a packaging bag that can be easily opened. It is another object of the present invention to provide a zipper-equipped packaging bag which can be resealed after opening the packaging bag and has a good opening property.
• the present invention is a bag in which the peripheral portions of two films on the front side and the back side are adhered to each other and sealed, and the linear cutability in one direction of the front side film is smaller than the linear cutability in any direction of the back side film.
• the present invention relates to a packaging bag provided with a processing portion that is large and that can start cutting the front side film along the one direction at a part of an adhesive peripheral portion crossing the one direction. With this configuration, it is possible to obtain a packaging bag that can be easily opened without a risk that the seal portion is peeled off at the distribution stage.
• the present invention provides a bag body in which the peripheral portions of the two films on the front side and the back side are adhered and sealed to each other, and provided resealably inside the adhered peripheral portion on the opening end side of the bag body.
• a zipper-equipped packaging bag having a zipper portion, wherein the linear force in one direction of the front side film is greater than the linear force in the direction of the backside film and the direction of misalignment;
• the zipper portion is provided between the adhesive peripheral portion on the opening end side of the bag body portion and the zipper portion, and a part of the adhesive peripheral portion intersecting with the one direction.
• the present invention relates to a packaging bag provided with a processing unit that can start cutting a front side film along a direction. With this configuration, there is no possibility that the sealed portion will be peeled off at the distribution stage, and the package can be easily opened, and a zipper-equipped packaging bag with good opening when resealing is obtained.
• the front side film of the packaging bag may be a laminated film including a linear cut film layer and a heat-fusible resin film layer whose linear cut property in one direction is larger than the linear cut property in any direction of the back film.
• the back film is composed of a laminated film including a heat-sealing resin film layer, and the front film and the back film are formed. It is preferable that the heat-fusible resin film layers of LUM are provided so as to face each other. With this configuration, the bag can be sealed without using an adhesive.
• the front side film is composed of a laminated film including a film layer having a linear force and a heat-fusible resin film layer
• the back side film is a heat-sealing property that does not include a film having a linear cut property. It may be a film configuration composed of a laminated film including a resin film layer.
• the adhesive peripheral portion is provided around the bag by heat-sealing and bonding, but is preferably provided by heat-sealing on four sides of the bag.
• the processing section is at least two close notches provided at the outer edge of the bonding peripheral portion of the packaging bag. With this configuration, opening can be started only by a simple process of providing a notch.
• processing section may be a knob-shaped notch provided in the peripheral area of the bonding of the packaging bag. This configuration reduces the risk of accidentally opening the bag during the distribution stage.
• the width of the bonding peripheral portion in the vicinity of the processing portion is configured to be wider than the width of other bonding peripheral portions. This configuration further reduces the risk of an opening accident at the distribution stage.
• processing units may be provided at a plurality of locations.
• the linear cut film layer is composed of any one of a uniaxially stretched polyolefin-based film, a biaxially stretched polyimide-based film, and a biaxially stretched polyester-based film.
• FIG. 1 is a conceptual diagram of a cross section of a packaging bag and a part of a laminated film constituting the packaging bag.
• FIG. 2 is a front plan view of an example of a zipper-equipped packaging bag.
• FIG. 3 is a front side plan view of another example of a packaging bag with a zipper.
• FIG. 4 is a front plan view of still another example of a packaging bag with a zipper.
• FIG. 5 is a front plan view of still another example of the packaging bag with a zipper.
• FIG. 6 is a conceptual diagram showing the opening state of the zipper-equipped packaging bag.
• FIG. 7 is a conceptual diagram of a cross-section showing an opening state of an easily-openable packaging bag with a zipper.
• FIG. 8 is a conceptual diagram of a cross section of a conventional zipper-equipped packaging bag in an opened state.
• FIG. 9 is a schematic diagram illustrating the concept of straight-line cutability.
• 1 is a packaging bag
• 2 is a front side laminated film
• 3 is a back side laminated film
• 4-1 is a base film layer of the front side laminated film
• 4-2 is a base film layer of the back side laminated film.
• 5 is a linear adhesive film layer
• 6-1 is a heat fusible film layer of the front side laminated film
• 6-2 is a heat fusible film layer of the back side laminated film
• 7 is an intermediate film layer
• 8 is 4 Seal bag
• 9-1 is horizontal seal
• 9-1 is vertical seal
• 10 is zipper
• 11 is processing part
• 12 is notch
• 13-1, 13-2 is seal protruding part
• 14 -1, 1 4-2 are notches
• 15 is the tear line of the front side laminated film
• 16 is the tear line of the back side laminated film
• 17 is the opening piece
• 18 is the opening space after removing the opening piece 17
• 19-1 and 19-2 are the cut end faces of the film of the conventional packaging bag.
• FIG. 1 is a cross-sectional view of a part of the four-side seal bag, and illustrates the respective laminated configurations of the front side film 2 and the back side film 3 and their relative arrangement when forming the packaging bag 1.
• the laminated film 2 on the front side is a film having a linear cut property.
• the laminated film 3 on the back side is a film having no linear cut property or having a smaller linear cut property than the laminated film 2.
• the linear cut property referred to in the present invention means a property defined by the following measurement method. That is, along the flow direction at the time of film production and along the direction perpendicular to the flow direction,
• films have molecular orientation
• the degree of tearing of the film may vary depending on the tearing direction of the film, so the above tear test is performed for the left and right directions of the film, and the tip of the tear becomes thin when the film is torn.
• Judgment of the straight cutability is based on the width of the leading end "X" of the film. The closer the value of X is to 3 O mm, the better the linear cutting property. Films with a value of X less than 5 mm or a tearing edge that does not reach the opposite edge are called films without linear force.
• the four-sided seal bag in FIG. 1 is composed of two types of films, a front side laminated film 2 and a back side laminated film 3.
• the front side laminated film 2 is composed of a base film layer 41, a film layer 5 having a linear cut property, and a heat-fusible film layer 6-1.
• a base film layer 41 a film layer 5 having a linear cut property
• a heat-fusible film layer 6-1 a heat-fusible film layer 6-1.
• the order of lamination of the base film layer 4-1 and the film layer 5 having a linear force may be reversed, and the base film layer 4-1 may not be provided.
• other intermediate film layers may be laminated.
• a linear cut property is imparted to the laminated film by using a film having a linear cut property as a part of a layer structure.
• the two films differing in the molecular orientation described in the bulletin are stacked back-to-back, that is, a combination of two films that exhibits a linear force as a set.
• a linear force may be imparted to the front side laminated film by using the above film layer as a part of the layer constitution.
• the back side laminated film 3 is composed of a base film layer 4-2, an intermediate film layer 7, and a heat-fusible film layer 6-2.
• the intermediate film layer 7 may not be provided.
• the base film layers 4_1 and 4_2 include polyolefin resin films such as polypropylene, polyamide resin films such as nylon 6, nylon 66 and nylon 12, polyethylene terephthalate, and polybutylene terephthalate.
• a biaxially stretched film such as a polyester resin film is preferably used.
• the film layer 5 having a linear cut property includes a uniaxially stretched polyethylene film, a uniaxially stretched polypropylene film, or other uniaxially or uniaxially stretched polyolefin resin film, and, for example, Japanese Unexamined Patent Publication No. Hei 7-113015.
• Nye as described A biaxially stretched polyamide-based film prepared by mixing a polymeta-xylylene adipamide resin with a Ron 6 resin and devising a layer separation structure and stretching conditions, and also described in, for example, JP-A-11-309916
• heat-fusible resin film layers 6-1 and 6-2 films of low-density polyethylene, linear low-density polyethylene, copolymerized resin with ethylene-copolymerizable bur compound, or polypropylene resin film are used. Used. It is preferable that the types of resins of the film layers 61 and 6-2 are the same.
• the laminated film is required to have water vapor, gas barrier properties, or aroma barrier properties in storing the contents filled in the bag, use a polyvinylidene chloride resin layer or ethylene vinyl on the base film layers 4-1 and 4-2.
• metal foil such as aluminum
• poly Films such as vinylidene chloride resin films, ethylene vinyl alcohol resin films, and co-extruded films of these with other resins can be laminated.
• paper can be laminated.
• the front-side laminated film 2 and the back-side laminated film 3 are formed into a four-sided seal bag according to a conventional method with the heat-fusible film layers 6-1 and 612 facing each other.
• the method for producing the laminated film is not particularly limited, and a dry or et lamination method in which the films are laminated using an adhesive, a sand lamination method in which the laminated films are extruded by extruding molten polyethylene or the like from a T-die, An extrusion lamination method in which molten polyethylene or the like is extruded from a T-die and laminated, and a thermal lamination method using a low melting point heat-fusible resin are used depending on the purpose.
• FIGS. 2 to 5 show examples of a four-sided seal bag 8 with a zipper
• the bag 8 is composed of a front laminated film 2 and a back laminated film 3 (in the figure, the front laminated film is located on the front side of the paper surface).
• the periphery of the package or film is formed by the horizontal seal 9-1 at the opening end, the horizontal seal at the closed end, and the two vertical seals 9-2.
• a processing part 11 for easily starting cutting.
• the bag 8 is usually obtained by filling the contents of a bag molded in a state where three sides are sealed and one side is opened and then sealing the opening surface.
• the front side laminated film 2 has a linear cut property in the direction indicated by an arrow parallel to the horizontal seal 9 _ 1, and the end of the vertical seal 9-12 in a direction perpendicular to this direction.
• a cut 12 such as a U-shaped or U-shaped or a U-shaped cut is provided as a tearing start site for tearing the front side laminated film 2 in the direction of the straight line indicated by the arrow.
• the notch 12 is arranged so that the axis of symmetry of the notch 12 is arranged substantially parallel to the direction of the linear cut property of the film, and the notch 12 is the outer edge of the bag along the direction of the linear cut property.
• the part closest to the bag is cut, while the part furthest from the outer edge of the bag along the direction of the straight cut is not cut and remains connected to the film.
• the cut portion forms a knob shape that can be grasped with fingers.
• This knob-shaped part becomes the processing unit 11.
• FIG. 3 shows an example in which the protruding portion 13-1 of the processing section 11 is straddling the horizontal seal 9-1
• FIG. 4 shows an example in which the protruding portion 13-2 is not straddling the horizontal seal 9-1. It is.
• the shapes of the protruding seal portions 13-1 and 13-2 in FIGS. 3 and 4 are shown as being angular, but may be other shapes, for example, having rounded corners.
• FIG. 5 shows an example in which notches 141-1 and 14-2 are provided at the outer edge of the seal section as processing sections 11 in close proximity at regular intervals.
• This figure shows an example in which two large notches 14 are provided. It may be provided along the outer edge.
• the opening piece which is torn from the two substantially parallel tear lines starting from these two places, can be opened without affecting the rest of the bag. Specifically, the size of the cut 12 of the processing unit 11 in FIGS.
• the interval of the notch 14 may be any size as long as the cut can be gripped and pulled with a fingertip. Typically, it should be about 5 mm to 15 mm.
• the size of the cut 12 and the distance between the notches 14 define the width of tearing of the front side film 2 when the bag is opened, and the length may be changed when the tear width is to be changed.
• the direction of the notch 14 is provided substantially parallel to the direction of the straight cut.
• the notch 1 2 ⁇ notch 1 4 etc. of the processing section 11 are applied when the bag is made.
• FIG. 6 shows a state in the middle of opening of the four-side seal bag 8 of FIG. 2.Opening is performed by raising the notch 12 of the processing unit 11 of FIG. Pull in the direction of the straight line indicated by the arrow, that is, in the direction perpendicular to the vertical seal 9-2 provided with the processing section 11 (the direction of pulling the arrow in FIG. 6). Since the film 5 having a linear cut property is laminated on the front side laminated film 2, the front side laminated film 2 can be torn at a substantially linear tear line 15 as an unsealed piece having an interval width of notch 12.
• the linear side tear force of the front side laminated film 2 affects the linear direction tear force, but the sealing edge inside the bag is applied.
• the tapered portion of the back side of the backing film is cut off as shown by a tear line 16 at a point slightly inside, and a part of the inner surface of the backside laminating film is cut off. Separate from film. As a result, only the front side laminated film 2 can be cut off as the opening piece 17.
• FIG. 7 is a cross-sectional view of the bag at the unsealing portion as viewed in the direction of arrows AA in FIG. 3 is a back side laminated film, 2 is a front side laminated film, 9-1 is a horizontal sealing portion, 10 is a zipper, 18 is a space from which the front side laminated film 2 after tearing the opening piece 17 is removed.
• the film 3 can be opened to the left and right, and the zipper 10 can be opened without the combination.
• packaging bag of the present invention does not necessarily need to be provided with the zipper 10.
• the easily openable packaging bag of the present invention provides a front laminated film of the four-side sealed bag 8 without making the seal portion easily peelable and without subjecting the backside film to easy tearing when sealing the film. Only 2 can be opened.
• An explanatory diagram or text may be printed on the above-mentioned packaging bag so that the consumer can recognize the opening portion of the bag and understand the opening method.
• the contents to be filled into the packaging bag are not particularly limited. It is especially suitable for packaging of flat items such as napkins, sliced ham and sliced cheese, and dry matter. Examples>
• the ⁇ m low density polyethylene described above was extruded and laminated.
• a laminated film was obtained in the same manner as described above, except that a normal polyethylene terephthalate film having a thickness of 12 m having no linear cut property was used instead of the linear cut polyethylene terephthalate film as the back side laminated film.
• the film on the front and back of the bag is continuously fed from the twin-screw feeding machine with the low-density polyethylene film faces each other, and the zipper band is fed, and the flow of the bag making machine
• One side of the bag opposite to the side with the zipper parallel to the direction is open and three sides are sealed.
• the seal width is 10 mm and the length in the film flow direction (transverse direction of the bag) is 100 mm.
• a so-called horizontal bag made of bag having a length of 150 mm in a direction perpendicular to the flow (vertical direction of the bag) was obtained.
• the zipper band is provided so that its upper end is located 15 mm from the inner edge of the horizontal seal, and the width (length in the vertical direction on the paper) shown in Fig.
• Idemitsu Unitech Co., Ltd. has a thickness of 15 ⁇ and a vertical linear cut polyamide film, Ueathlon ⁇ 100 000 and a thickness of 50 ⁇ ⁇ .
• a linear low-density polyethylene film was laminated by a dry lamination method using a two-component polyurethane adhesive.
• a laminated film was obtained in the same manner as in Example 1 except that a normal nylon 6 film having a thickness of 15 ⁇ and having no linear cut property was used instead of the straight-cut polyamide, as the back-side laminated film. These laminated films were made in the same manner as in Example 1 to obtain bags with zippers.
• the processing section protrudes the end of the seal by 5 mm into the inside of the packaging bag as shown in 13-1 in Fig. 3 to make the width of the seal locally 15 mm wide, and the outer end of the seal A cut similar to that of Example 1 was made at a position 5 mm from the part.
• the back side laminated film was tapered at 13 mm from the seal edge on the inner side of the bag, and was again cut off from the opening piece 17.
• the zipper had good mouth opening.
• a linear low-density polyethylene film of YT22 and a thickness of 30 ⁇ was laminated in this order using a two-component polyurethane adhesive.
• the same backside film as in Example 2 was used as the backside film.
• the laminated film on the front and back of this bag is made by a bag making machine having a biaxial feeding machine, and one side of the bag in the flow direction of the bag making machine is opened and three sides are sealed. A bag with 0 mm and a seal width of 1 O mm was obtained. At this time, no zipper as provided in Examples 1 and 2 was provided.
• a first I notch with a length of 5 mm is applied to the seal in the flow direction of the bag making machine at a position 25 mm from the end of the bag in a direction perpendicular to the seal edge, and from there the seal edge direction
• a second I-notch was applied at a distance of 1 Omm to the second.
• the bag was produced in the same manner as in Example 1, except that the front-side laminated film of Example 1 was also used on the back side of the bag, that is, a bag using the laminated film having linear force on both sides of the bag.
• the bag was evaluated in the same manner as in Example 1. In this bag, the back laminated film could not be separated from the opened piece and could not be opened.
• a bag was produced in the same manner as in Example 2 except that the back side laminated film of Example 2 was used also on the front side of the bag, that is, a bag using a laminated film having neither linear back nor front side.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Bag Frames (AREA)
• Packages (AREA)

Priority Applications (5)

Applications Claiming Priority (4)

Publications (1)

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Citations (3)

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• 2002
  • 2002-12-26 CN CNA028263650A patent/CN1610633A/zh active Pending
  • 2002-12-26 KR KR10-2004-7010065A patent/KR20040063004A/ko not_active Application Discontinuation
  • 2002-12-26 EP EP02805904A patent/EP1468931A4/en not_active Withdrawn
  • 2002-12-26 AU AU2002357523A patent/AU2002357523A1/en not_active Abandoned
  • 2002-12-26 WO PCT/JP2002/013686 patent/WO2003055761A1/ja not_active Application Discontinuation
  • 2002-12-26 JP JP2003556309A patent/JP4386731B2/ja not_active Expired - Fee Related

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