JP2008143586A - Plugged bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plugged bag which can be attached to a bag main body by sealing at a low temperature and has a spout causing no thermal deformation even when filled with a content at a temperature of 80°C or more after attachment. <P>SOLUTION: The bag with the plug is composed of a double film which keeps an outer film overlying an inner film, and has the plug that comprises a cap and a spout and is attached to the bag main body with sealed circumferential margin wherein an outward protruding attachment part is connectively mounted on the outer circumference of the lower end of the bag main body of a hollow tubular part composed of a high-density polyethylene resin or a linear low density polyethylene resin; at least a male screw part is connectively mounted on the upward outer circumference; the side of the attachment part in contact with the content is a highly heat-resistant layer composed of the same resin as that of the hollow tubular part; and a low-density polyethylene-made low-temperature seal layer having a predetermined width overlies the side of the attachment part opposite to the surface of the highly heat-resistant layer in contact with the content. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a bag to which a cap composed of a cap and a spout is attached.

Containers for filling and sealing foods such as food ingredients, beverages, dairy products, alcoholic beverages, seasonings, and non-foods such as photographic processing agents, wax for floors, detergents, toiletries, etc. In general, a packaging form called a bag-in-box is used. The bag-in-box is composed of an inner bag in which a cap made of a cap and a spout is attached to a bag made of a plastic film, and a cardboard box for covering the inner bag. Usually, the innermost surface of the inner bag to be used is often made of a low-density polyethylene resin or a linear low-density polyethylene resin. In that case, a spout made of a low-density polyethylene resin is used as a spout for the plug. For example, when the contents are easily deteriorated due to microorganisms such as soot, it is necessary to fill the contents at a high temperature in order to prevent the deterioration. When a spout made of low density polyethylene resin is used, the spout made of low density polyethylene resin is thermally deformed at the time of filling and sealing, resulting in bad effects such as a defective seal. A pouch having a spout having a spout made of a resin having high heat resistance has been proposed (for example, see Patent Document 1).
JP 2006-69558 A

  However, since the proposed pouch is made of a resin having heat resistance, the spout needs to be heat-sealed at a high temperature when the spout is heat-sealed to the main body of the pouch, and the attaching speed becomes slow. There was a problem that production efficiency did not increase.

  It is an object of the present invention to have a spout having a spout that can be sealed and attached at a low temperature when attached to a bag body, and that does not thermally deform even if the contents are filled and sealed at a temperature of 80 ° C. or higher after attachment. Is to provide a bag.

  The invention according to claim 1 of the present invention comprises a cap made of a cap and a spout at a predetermined position of a bag body which is made of a double film in which an outer film and an inner film are overlapped and the periphery is sealed. In the attached cap-attached bag, the spout is continuously connected to the outer periphery of the lower end of the bag body side of the hollow tube portion made of high heat resistant resin, and further, at least on the outer periphery above it, It has a shape in which external thread parts projecting outward are continuously provided, and the attachment part is a high heat-resistant layer made of the same resin as the hollow tube part on the side in contact with the contents, and is in contact with the contents of the high heat-resistant layer The bag with a cap is characterized by comprising a two-layer structure in which a low-temperature sealing layer made of a low heat-resistant resin is laminated with a predetermined width on the opposite side of the surface.

The invention according to claim 2 of the present invention is the invention according to claim 1, wherein the high heat resistant resin is a linear low density polyethylene resin or a high density polyethylene resin having a density of 0.94 g / cm ³ or more. The bag with a stopper is characterized in that the low heat resistant resin is a low density polyethylene resin.

The bag with a cap of the present invention is composed of a double film in which an outer film and an inner film are laminated, and a cap and a spout are attached to a predetermined position of the bag body whose peripheral edge is sealed. In the bag with a stopper, the spout is connected to an outer periphery of the lower end on the bag body side of the hollow tube portion made of a high heat-resistant resin, and is further provided at least on the outer periphery at the upper outer periphery thereof. The shape of the projecting male screw part is continuous, and the attachment part is a high heat-resistant layer made of the same resin as the hollow tube part on the side in contact with the contents, and the surface in contact with the contents of the high heat-resistant layer It has a two-layer structure in which a low-temperature sealable layer made of a low heat resistant resin is laminated with a predetermined width on the opposite side surface, and the high heat resistant resin is a linear low density polyethylene resin or a density of 0.94 g / cm ³ or more. High density polyethylene resin Since the low heat resistant resin is a low density polyethylene resin, the spout can be attached efficiently without being deformed by sealing at a low temperature when the spout is attached to the bag body, and the spout is attached to the bag. Even if the contents are filled and sealed at a temperature of 80 ° C. or higher, the spout is not deformed.

  The bag with a stopper of the present invention will be described below along the embodiment. Fig.1 (a) is a top view which shows one Embodiment of the bag with a stopper of this invention, and a bag with a stopper (1) consists of a double film which laminated | stacked the film for outer sides, and the film for inner sides. A heat seal part (3) is provided at the periphery of the bag body (2), and a stopper (30) is attached and attached to a predetermined position of the bag body (2) at the circular seal part (4). 1 (b) is a cross-sectional view taken along the line AA ′ of FIG. 1 (a). The plug (30) includes a spout (10) and a cap (20), and the spout (10) A male threaded portion projecting outward to have the mounting portion (14) projecting outward on the outer periphery of the lower end on the bag body side of the hollow tube portion (11) and for twisting the cap (20) to the upper outer periphery (12) and a shape having a handling part (13) protruding outward, and an attachment part 14) is a high heat resistant layer (14b) made of a high heat resistant resin on the side in contact with the contents, and a low temperature sealable layer (14a) made of a low heat resistant resin is laminated on the high heat resistant layer (14b) with a predetermined width. It has a two-layer structure. Furthermore, it has the circular seal | sticker part (4) formed by sealing the part of the low temperature sealable layer (14a) of the attaching part (14) of a spout (10) from the outer side of the film for outer sides (101). The spout (10) has an opening (40) on the bag body side, and a space (50) between the outer film (101) and the inner film (102). The low temperature sealing layer (14a) may have the same width or a narrow width as the high heat resistant layer (14b).

  The handling section (13) is provided for use when transporting a bag with a spout attached thereto.

  The spout (10) is produced by using two types of resins, a high heat resistant resin and a low heat resistant resin, to form a hollow tube portion (11), a male screw portion (12), a handling portion (13), and an attachment. The part (14) is simultaneously integrally molded by a two-color injection molding method.

The low heat-resistant resin used for the low-temperature sealable layer (14a) of the attachment portion (14) is a low-density polyethylene resin having a density of 0.90 to 0.93 g / cm ³ , and the high-heat resistant layer (14b) The high heat resistant resin used is a linear low density polyethylene resin or a high density polyethylene resin having a density of 0.94 g / cm ³ or more. The linear low density polyethylene resin has higher heat resistance than the low density polyethylene resin. The cap (20) is made of polyethylene resin or polypropylene resin.

FIG. 2A is a side sectional view showing an embodiment of an outer film used in the bag with a cap of the present invention, and the outer film 101 is a linear low density polyethylene resin film or a density of 0. It is made of a low-density polyethylene resin film of .89 to 0.93 g / cm ³ and has a thickness of 30 to 50 μm. FIG. 2 (b) is a side sectional view showing another embodiment of the outer film, and the outer film (101 ′) has a resin film layer (201), an adhesive layer (203), The film base layer (200), the adhesive layer (204), and the resin film layer (202) are laminated.

The resin film layer (201, 202) is composed of a linear low density polyethylene resin film or a low density polyethylene resin film having a density of 0.89 to 0.93 g / cm ³ and a thickness of 30 to 70 μm. Is used.

  On the film base layer (200), a biaxially stretched nylon film, a biaxially stretched polyester film, a biaxially stretched nylon film or a biaxially stretched polyester film is laminated with a deposited thin film layer made of aluminum metal, silicon oxide or aluminum oxide. A barrier laminated film, a biaxially stretched nylon film and a barrier nylon film coated with a vinylidene chloride resin are used alone. Of course, you may use the film of the laminated structure which bonded together the said various films suitably. The film thickness is appropriately selected.

A polyurethane adhesive is generally used for the adhesive layers (204, 205). Usually, a two-component adhesive is used in which two components of a main component having a hydroxyl group and a curing agent having an isocyanate group are mixed. The lamination is performed by a known gravure coating method. The coating amount is preferably 1 to 5 g / m ² (dry state).

FIG. 3 is a side sectional view showing an embodiment of the inner film used for the bag with a cap of the present invention. The inner film (102) is a linear low density polyethylene resin film or a density of 0.89 to It consists of a low density polyethylene resin film of 0.93 g / cm ³ and a film thickness of 50 to 100 μm is used. In addition, linear low-density polyethylene resin film not only has higher heat resistance than low-density polyethylene resin film, but also film strength, heat seal strength, hot tack property, foreign matter seal property, oil / chemical resistance It is better to use it when the content is large or when the contents need to be filled at a high temperature.

  As described above, the spouted bag of the present invention has a portion of a low temperature sealable layer made of a low heat-resistant resin at a portion where the spout is attached to the bag, and further, other than the low temperature sealable layer of the spout. Because the part of is made of high heat-resistant resin, when attaching to the bag, the part of the low temperature sealable layer of the attachment part is heat-pressed from the outside of the outer film and sealed, so that it can be sealed at low temperature, Production efficiency at the time of spout installation is also improved, and problems such as poor sealing do not occur. Furthermore, even if the contents are filled and sealed at a high temperature, the spout does not thermally deform.

(A) is a top view which shows one Embodiment of the bag with a stopper of this invention, (b) is the sectional view on the AA 'line of (a). (A) is a sectional side view which shows one Embodiment of the film for outer sides used for the bag with a stopper of this invention, (b) is a sectional side view which shows other embodiment of the film for outer sides. It is a sectional side view which shows one Embodiment of the film for inner sides used for the bag with a stopper of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Bag with stopper 2 ... Bag main body 3 ... Heat seal part 4 ... Circular seal part 10 ... Spout 11 ... Hollow pipe part 12 ... Male thread part 13 ... Handling part 14 ... Attachment part 14a ... Low temperature sealing layer 14b ... High heat resistant layer 20 ... cap 30 ... plug 40 ... opening 50 ... space 100 ... double film 101, 101 '... film for outer side 102 ... film for inner side 200 ... film base material layer 201, 202 ... resin film layer 203, 204 ... Adhesive layer

Claims (2)

  In a bag with a cap, which is made of a double film in which an outer film and an inner film are overlapped, and a cap having a cap and a spout is attached to a predetermined position of the bag body whose periphery is sealed, , A mounting portion projecting outward is continuously provided on the outer periphery of the lower end of the bag body side of the hollow tube portion made of high heat-resistant resin, and at least an external thread projecting outward is continuously provided on the outer periphery above it The shape and the attachment portion is a high heat-resistant layer made of the same resin as the hollow tube portion on the side in contact with the contents, and is made of a low heat-resistant resin on the side opposite to the surface in contact with the contents of the high heat-resistant layer A bag with a stopper, comprising a two-layer structure in which a low-temperature sealing layer is laminated with a predetermined width. The high heat resistant resin is a linear low density polyethylene resin or a high density polyethylene resin having a density of 0.94 g / cm ³ or more, and the low heat resistant resin is a low density polyethylene resin. Bag with spout.

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