JP2005335781A - Packaging bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging bag having a wide printing range, which is subjected to high temperature and high pressure sterilization and having both a self-standing characteristic and a wide opening. <P>SOLUTION: This packaging bag comprises: a front flat plate and a rear flat plate composed of a laminated sheet A in which a water-proof paper layer is stacked up on one surface of a substrate layer composed of either a single layer film or a multi-layer film and a heat-resistant sealant layer is stacked up on the other surface; and a laminated sheet B having the heat-resistant sealant layer on one surface of the substrate layer composed of either a single layer film or a multi-layer film, and both side surface plates folded into a V-shape. Lines for use in folding the flat plates to arrange a square-shaped bottom surface at the predetermined positions of the bottom seal side of the outer-most water-proof paper layers of the front flat plate and the rear flat plate of a gazette where an opening is arranged at one side, the bottom seal is arranged at the opposed side of the opening and an end edge seal is arranged at a residual side. Further, a straight perforation for facilitating a seal opening is arranged at the predetermined positions of the opening in the outer-most water-proof papers of the front flat plate and the rear flat plate. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a packaging bag for packaging contents such as various foods, and more particularly to a packaging bag that can be sterilized at high temperature and high pressure, is self-supporting, and has a wide-mouth opening.

In recent years, as a packaging material, a lot of foods that are sterilized at high temperature and high pressure after filling the plastic tray with hermetically sealed contents with a plastic tray with a wide-mouthed opening and a cover material with a laminated structure are produced. In particular, aseptic rice is attracting attention because of its good taste. As a method for producing sterile cooked rice, a method using the same packaging material as described above has been proposed (for example, see Patent Document 1).
Japanese Patent Publication No. 7-100004

  However, in the packaging material used in the method for producing aseptic cooked rice, printing is generally performed on the lid, and the printing range is limited. Therefore, it is necessary to use an outer box on which printing is further performed, and there is a negative effect such as an increase in product cost.

  An object of the present invention is to provide a packaging bag having a wide printing range, capable of high-temperature and high-pressure sterilization, and having a self-supporting property and a wide-mouth opening.

  The invention according to claim 1 of the present invention is a laminated sheet in which a water-resistant paper layer is laminated on one surface of a base layer composed of a single layer or multilayer film, and a heat-resistant sealant layer is laminated on the other surface. Both sides formed of a laminated sheet B in which a heat-resistant sealant layer is laminated on one surface of a front and back plane plate made of A and a base layer made of a single layer or a multilayer film and folded in a V shape The front and back flat surfaces of the gusset bag are provided with an opening on one side, a bottom seal on the opposite side of the opening, and an edge seal on the other side. From a ruled line parallel to the bottom seal part, which is bent at a predetermined position on the bottom seal part side of the outermost water-resistant paper layer of the face plate so that the sealant layer is folded inward to provide a rectangular bottom face part. It is a packaging bag characterized by .

  The invention according to claim 2 of the present invention is the invention according to claim 1 for facilitating opening at a predetermined position on the opening side of the outermost water-resistant paper layer of the front and back plane plates. A packaging bag comprising a linear perforation line provided in parallel with an opening.

The packaging bag of the present invention comprises a laminated sheet A in which a water-resistant paper layer is laminated on one side of a base layer composed of a single layer or a multilayer film, and a heat-resistant sealant layer is laminated on the other side. And a flat plate on the back side, and a side plate on both sides which is made of a laminated sheet B in which a heat-resistant sealant layer is laminated on one side of a base layer made of a single layer or a multilayer film and folded in a V shape The outermost of the flat plate on the front and back of the gusset bag, which has an opening on one side, a bottom seal on the opposite side of the opening, and an edge seal on the other side In the predetermined position on the bottom seal portion side of the water-resistant paper layer, a ruled line is provided in parallel with the bottom seal portion so as to bend so that the sealant layer is on the inner side to provide a rectangular bottom surface portion. The outermost surface of the front and back flat plates Since a straight perforation for easy opening is provided in a predetermined position on the opening side of the water-resistant paper layer in parallel with the opening, the ruled line is used when using this packaging bag. Fold the front and back plane plates through, and provide a rectangular bottom surface, and by providing an opening of approximately the same size as the bottom surface, easily fill the contents from the opening, It can be sealed, and further high-temperature and high-pressure sterilization is possible after sealing. Further, when opening a filled and sealed bag, the bag can be torn and opened along a straight perforation line. Furthermore, by using a gas barrier film for the base material layer, excellent content preservation can be imparted.

  The packaging bag of this invention is demonstrated in detail below along embodiment. Fig.2 (a) is side sectional drawing of one Embodiment of the lamination sheet A used for the plane board of the front and back surface of the packaging bag of this invention, and the lamination sheet A (1) is water-resistant paper in order in the thickness direction. The layer (7), the adhesive layer (6), the base material layer (3), the adhesive layer (4), and the sealant layer (5) are laminated, and (b) is the packaging bag of the present invention. It is side sectional drawing of one Embodiment of the lamination sheet B used for the side plate of both sides of this, and lamination sheet B (2) is a base material layer (3), an adhesive bond layer (4), and a sealant layer in order in the thickness direction. (5) is laminated.

  The base layer (3) is composed of a single layer or a multilayer film. Examples of the film used include a biaxially stretched polypropylene film having a thickness of 20 to 30 μm and a biaxially stretched nylon film having a thickness of 15 to 25 μm. Biaxially stretched polyester film having a thickness of 6 to 12 μm, gas barrier film obtained by laminating a vapor-deposited thin film layer of an inorganic oxide such as silicon oxide or aluminum oxide on a biaxially stretched polyester film having a thickness of 6 to 12 μm, and the like Furthermore, a biaxially stretched nylon film, an unstretched nylon film, a biaxially stretched polyvinyl alcohol film (thickness 6 to 15 μm), an ethylene / vinyl alcohol film (thickness 6 to 20 μm), etc. were laminated on the film. A laminated film can be used.

As the adhesive used for the adhesive layers (4, 6), a polyurethane-based adhesive is generally used. Usually, a two-component type is used in which a main component having a hydroxyl group and a curing agent having an isocyanate group are mixed in two components. The coating method is also applied by a known method such as a gravure coating method. The coating amount is preferably 1 to 5 g / m ² (dry state).

  The sealant layer (5) is made of a heat-resistant polyolefin resin, and the resin used is a homopolypropylene resin, a propylene / ethylene random copolymer, a propylene / ethylene block copolymer, or a polypropylene / α-olefin copolymer. It is possible to select a polypropylene-based resin or the like. The thickness is set to 10 μm or more. By using the resin, high temperature and high pressure sterilization becomes possible.

The water-resistant paper layer (7) is made of a base paper impregnated with an isocyanate compound or rubber latex. As the base paper, 100% virgin pulp, waste paper, recycled paper, plant fiber paper such as kenaf other than wood pulp, etc. can be used, but are not limited to these. It is not a thing. The basis weight of the substrate sheet to be used is appropriately selected depending on the intended purpose in a range of ^{20g / m 2 ~600g / m 2} . Examples of the isocyanate compound include various diisocyanates such as phenylene diisocyanate, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, naphthalene diisocyanate, xylylene diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, and 4,4-diphenylmethane diisocyanate. Monomers and their polymers and derivatives are used. Applying and impregnating as a coating or impregnation method by internal addition at the paper making stage, or by using a known coating method such as gravure coating, roll coating, air knife coating, spray coating, dip coating method on a paper machine with a separate machine There is a way to do it. The amount of the isocyanate compound or rubber component impregnated is preferably 1% by weight to 10% by weight with respect to the weight of the base paper.

  Fig.1 (a) is a perspective view which shows one Embodiment of the packaging bag of this invention, and a packaging bag (10) is a front plane board (11) which consists of the said laminated sheet A (1), and a back plane board ( 12) and the side plates (13, 14) on both sides which are made of the laminated sheet B (2) and folded into a V shape, and are provided with an opening (15) on one side. The bottom seal portion (16) is provided on the opposite side of 15), and the edge seal portions (17, 18, 19, 20) are provided on the remaining sides. Further, ruled lines (21, 22) are provided in parallel with the bottom seal portion (16) at predetermined positions above the bottom seal portion (16) of the outermost water-resistant paper layer of the front and back flat plates (11, 12). Similarly, linear perforation lines (23, 24) are parallel to the opening (15) at predetermined positions on the opening (15) side of the outermost water-resistant paper layer on the front and back plane plates. Furthermore, a tear start portion (25 in the cut state for tearing in the width direction at the end portions of the edge seal portions (17, 18, 19, 20) on both sides of the perforation line (23, 24). , 26, 27, 28). The ruled lines (21, 22) are provided to bend the front and back plane plates so that the sealant layer is on the inside so as to facilitate the formation of a square bottom surface. By forming, a packaging bag can be made self-supporting. The shape of the tear start portion (25, 26, 27, 28) is not particularly limited, and may be, for example, a triangular shape. The predetermined position at which the perforation line (23, 24) is provided refers to a position that is below the base portion of the seal portion provided at the opening when the packaging bag is filled with the contents and hermetically sealed. .

  FIG.1 (b) is a perspective view for demonstrating the state which gave the self-supporting property using the packaging bag of (a), and the opening part (29) substantially the same size as a square-shaped bottom part (29). 15) is provided, and the filling operation is facilitated when the contents are filled from the opening (15).

(A) is a perspective view which shows one Embodiment of the packaging bag of this invention, (b) is a perspective view for demonstrating the state which gave the self-supporting property using the packaging bag of (a). (A) is side sectional drawing which shows one Embodiment of the lamination sheet A used for the plane board of the packaging bag of this invention, (b) is one of the lamination sheet B used for the side board of the packaging bag of this invention. It is a sectional side view showing an embodiment.

Explanation of symbols

1 ... Laminated sheet A
2 ... Laminated sheet B
DESCRIPTION OF SYMBOLS 3 ... Base material layer 4, 6 ... Adhesive layer 5 ... Sealant layer 7 ... Water-resistant paper layer 10 ... Packaging bag 11, 12 ... Plane plate 13, 14 ... Side plate 15 ... Opening part 16 ... Bottom seal part 17, 18 , 19, 20... Edge seal portions 21 and 22. Ruled lines 23 and 24. Perforation lines 25, 26, 27 and 28.

Claims (2)

  Front and back plane plates made of a laminated sheet A in which a water-resistant paper layer is laminated on one side of a base layer composed of a single layer or a multilayer film, and a heat-resistant sealant layer is laminated on the other side; Consists of a laminated sheet B in which a heat-resistant sealant layer is laminated on one side of a base layer made of a single layer or a multilayer film, and includes side plates on both sides folded in a V-shape, with an opening on one side A bottom seal portion is provided on the opposite side of the opening, and an edge seal portion is provided on the remaining side. A packaging bag comprising a ruled line provided in parallel to the bottom seal portion for folding a sealant layer at a predetermined position on the seal portion side so as to provide a rectangular bottom surface portion.   A straight perforation line for facilitating opening is provided at a predetermined position on the opening side of the outermost water-resistant paper layer on the front and back plane plates, and is characterized in that it is provided in parallel with the opening. The packaging bag according to claim 1.

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