JP2016084166A - Spout and multilayer resin molding used for manufacture of same, and pouch with spout to which same is attached - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spout which can be manufactured more easily and of which a gas barrier can be guaranteed.SOLUTION: A spout 1 is configured from at least a spout body 2 and a multilayer resin molding 3A. In the spout, the spout body 2 is equipped with a pouring-out part 20, a stem 21, and a pouring-out hole 24 which penetrates the pouring-out part 20 and the stem 21, the multilayer resin molding 3A is equipped with a cylindrical part 33 and a flange part 34, and any layer other than an innermost layer 30 in the multilayer resin molding comprises a functional resin layer 31, the cylindrical part 33 has a top wall 35 in which a communication planned part is formed and is positioned in the pouring-out hole 24, the flange part 34 is so formed as to have a shape substantially same as a bottom surface 21b of the stem 21 in a bottom view, and an outer peripheral edge part 34a thereof can be deposited or bonded to a pouch to which the spout 1 is attached.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a spout, a multilayer resin molded product used for manufacturing the spout, and a pouch with a spout to which the spout is attached.

  A bag-like container generally called a “pouch” formed by welding a synthetic resin film in a bag shape has a gas barrier property in order to prevent the contents from being oxidized. A pouch includes a spout with a spout, which is generally made of a synthetic resin and is called a “spout”. The spout to be mounted preferably has gas barrier properties.

  A pouch is a bag made by welding the outer edge of a synthetic resin film that has been overlaid. By using a gas barrier resin for the film used to form the pouch, a pouch with excellent gas barrier properties can be easily manufactured. However, a spout is usually produced by injection molding a single resin such as polyethylene or polypropylene. Since polyethylene or polypropylene has a low gas barrier property, a method for producing a spout having a gas barrier property is described below. Various proposals have been made.

  For example, in the spout described in Patent Document 1, a spout having a gas barrier property is manufactured by insert-molding a multilayer and cylindrical sleeve having a gas barrier resin layer as an intermediate layer.

JP 2007-238104 A

  The conventional spout having gas barrier properties has the following problems. When the end face of the gas barrier resin layer is exposed, if it is always brought into contact with the contents in the pouch, the resin component is eluted into the contents, which is not preferable for hygiene purposes. To solve this problem, for example, in the spout described in Patent Document 1, when the sleeve is insert-molded, the end surface is covered with a resin constituting the spout. Etc., and the manufacturing process is complicated.

  Furthermore, in the spout described in Patent Document 1, the discharge opening of the spout is sealed with a sealing cap, but oxygen and the like are allowed to enter from the sealing portion, and the gas barrier property is reduced. Become.

  Then, an object of this invention is to provide the spout which can be manufactured more easily and can ensure more gas-barrier property.

  The present invention is a spout comprising at least a spout body and a multilayer resin molded body. The spout body includes a pouring portion, a base portion, the pouring portion and a pouring hole penetrating the base portion. The multilayer resin molded body includes a cylindrical portion and a flange portion, and any layer other than the innermost layer is a functional resin layer, and the cylindrical portion has a planned communication portion. It has a top wall and is located in the pouring hole, and the flange portion is formed in substantially the same shape as the bottom surface of the base portion, and its outer peripheral edge portion is welded or bonded to a pouch to which the spout is attached. It is a spout characterized by being possible.

  Moreover, this invention is a multilayer resin molding used for manufacture of the said spout. Moreover, this invention is a pouch with a spout to which the above spout is attached. In the present invention, the functional resin layer can be a gas barrier resin layer.

  According to the present invention, the spout is composed of at least a spout body and a multilayer resin molded body having the above-described collar portion, and the outer peripheral edge portion of the collar portion, which is the end surface of the functional resin layer, is pouched. It is possible to prevent the elution of the same resin component from the contents and to manufacture a spout having a gas barrier property more easily. Can do.

  In addition, the present invention allows a multi-layer resin molded body having a top wall to be placed in a pour hole, so that the pour hole can be closed with a functional resin layer such as a gas barrier layer before opening. It is possible to prevent deterioration of quality of products and flavor reduction.

It is a front view which shows 1st and 2nd embodiment of this invention. It is a bottom view which shows 1st and 2nd embodiment of this invention. It is a top view which shows 1st Embodiment of this invention. It is the IV-IV sectional view taken on the line in FIG. FIG. 5 is an enlarged view of a main part of FIG. 4, (A) is an enlarged view of a main part near the top wall, and (B) is an enlarged view of a main part near the outer peripheral edge of the flange. It is a perspective view which shows the multilayer resin molding of 1st Embodiment of this invention. It is a top view which shows 2nd Embodiment of this invention. It is the VIII-VIII sectional view taken on the line in FIG. It is a perspective view which shows the multilayer resin molding of 2nd Embodiment of this invention. It is an example of a pouch with a spout to which the first or second embodiment of the present invention is attached.

  A first embodiment of the present invention will be described with reference to FIGS. 1 to 6 and FIG. First, the configuration of the spout 1 will be described.

  The spout 1 includes at least a spout body 2 and a multilayer resin molded body (hereinafter also referred to as a molded body) 3A. The spout body 2 forms the outer wall surface of the spout 1 and includes a pouring portion 20, a base portion 21, and a pouring hole 24 penetrating from the distal end 20 b of the pouring portion 20 to the bottom surface 21 b of the base portion 21. . The dispensing portion 20 is formed in a substantially cylindrical shape, and a thread 22 for screwing an upper lid (not shown) is formed on the outer peripheral surface thereof. The base portion 21 is provided so as to be continuous with the base end 20a of the extraction portion 20, and is formed in a substantially boat shape. In the present embodiment, a plurality of flanges 23 for welding the outer surface 21 a to the pouch 4 are formed on the outer surface 21 a of the base portion 21.

  The molded body 3 </ b> A forms the inner wall surface of the spout 1 and includes a cylindrical portion 33 and a flange portion 34. The cylindrical portion 33 is a topless and bottomless cylindrical body having a top wall 35 provided so as to be positioned in the pouring hole 24. Accordingly, the cylindrical portion 33 is formed to have a thickness (size) that can be accommodated in the extraction hole 24, and is formed to have substantially the same diameter as the extraction hole 24 in this embodiment.

  The top wall 35 is formed in a flat plate shape, and a communication scheduled portion 36 is formed. The communication scheduled portion 36 can be easily torn with a jig or the like (not shown) formed on the upper lid, and thereby the inside and outside of the pouch 5 with the spout are communicated. In the present embodiment, the communication planned portion 36 is a substantially cross-shaped (substantially x-shaped) perforated weakened portion, but the shape and the like can be changed as appropriate.

  The flange portion 34 is formed so as to extend outward from the base end portion 33a of the cylindrical portion 33, and has substantially the same diameter as that of the bottom surface 21b of the base portion 21 when viewed from the bottom, that is, in the present embodiment, Formed. Further, the outer peripheral edge portion 34 a of the collar portion 34 is formed so as to be welded or bonded to the pouch 4.

  The molded body 3 </ b> A includes at least two layers of the innermost layer 30 and the functional resin layer 31. In the present embodiment, the outer layer 32, the functional resin layer 31, and the innermost layer 30 are formed. The resin that forms the innermost layer 30 can be appropriately selected from resins that are hardly or substantially not eluted even if the contents in the pouch 4 are always touched. For example, polyethylene, polypropylene, etc. It is appropriately selected from polyolefins or polyesters such as polylactic acid. In the present embodiment, the innermost layer 30 and the outer layer 32 are formed of the same resin and the same resin as that forming the spout body 2.

  The functional resin layer 31 is formed of a resin having a function desired to be applied to the spout 1, for example, a resin having gas barrier properties. In the present embodiment, a gas barrier resin represented by polyamide, polyvinyl alcohol, ethylene-vinyl alcohol copolymer, polyvinylidene chloride, or the like is employed as the resin that forms the functional resin layer 31. In addition, the said gas barrier layer is not restricted to what prevents permeation | transmission of oxygen, You may prevent permeation | transmission of other gas, for example, water vapor | steam, hydrogen, etc.

  Next, the manufacturing method of 3A of molded objects, the spout 1, and the pouch 5 with a spout is demonstrated. 3 A of molded objects are shape | molded by the existing shaping | molding methods, such as vacuum (pressure air) shaping | molding, the resin sheet in which the functional resin layer 31 was pinched | interposed by the resin layer used as the outer layer 32 and the innermost layer 30. FIG. At this time, the surface from which the functional resin layer 31 is exposed is formed to be only the outer peripheral edge 34 a of the flange 34.

  The spout 1 is molded while the spout body 2 is molded by setting the molded body 3A thus molded in a mold (not shown) and insert molding. Thereafter, the upper lid is optionally screwed. At this time, the spout body 2 may be separately molded by an existing method such as injection molding, and the spout 1 may be molded by fitting the member to the molded body 3A. Further, the spout body 2 and the spout body 2 may be molded. It is also possible to weld or bond the body 3A by ultrasonic waves, heat, or the like.

  The pouch 5 with the spout is attached to the pouch 4 by welding or bonding the outer surface 21a of the base portion 21 and the outer peripheral edge portion 34a of the flange portion 34 to the pouch 4 filled with the contents. Manufactured. At this time, the entire outer peripheral edge 34 a may be welded or bonded to the pouch 4, but it is sufficient that at least the innermost layer 30 is welded or bonded to the pouch 4.

  Therefore, since the outer peripheral edge 34a of the flange 34 where the functional resin layer 31 is exposed is covered with the pouch 4, the contents in the pouch 4 are prevented from always touching the functional resin layer 31. can do. Moreover, since the pouring hole 24 is sealed before opening by the top wall 35 of the molded body 3A having the functional resin layer 31 as a gas barrier layer, the oxygen is passed through the pouring hole 24. Etc. can also be prevented from flowing into the pouch 4.

  As mentioned above, although this invention was demonstrated by the said embodiment, this invention is not limited to embodiment, In the range which does not change the summary of invention, it can change suitably. For example, as in the molded body 3B of the second embodiment of the present invention (see FIGS. 1, 2 and 7 to 10), a substantially domed or substantially hemispherical top instead of the flat top wall 35 is used. A wall 35 can also be formed. As a secondary effect of making the top wall 35 substantially dome-shaped or substantially hemispherical, it is possible to prevent liquid leakage immediately even if the planned communication portion 36 is broken and then tilted, and an easier flow rate. Adjustment is also possible.

  The form of the communication planned portion 36 can be changed as appropriate. For example, the communication planned portion 36 can be formed as a weakened portion having a substantially V-shaped or substantially U-shaped groove shape. In addition, the number of layers of the molded bodies 3A and 3B can be appropriately selected as necessary, and can include a plurality of functional resin layers 31. In this case, the functional resin layer 31 is Each can be formed from the same functional resin, but can also be formed from different functional resins. And it is also possible to combine each structure of the said 1st and 2nd embodiment suitably.

DESCRIPTION OF SYMBOLS 1 Spout 2 Spout main body 20 Outgoing part 20a Base end 20b Tip 21 Base 21a Outer surface 21b Bottom 22 Screw 23 Flange 24 Outlet 3A Multilayer resin molding 3B Multilayer resin molding 30 Innermost layer 31 Functional resin layer 32 Outer layer 33 Cylindrical part 33a Base end part 34 Gutter part 34a Outer peripheral edge part 35 Top wall 36 Communication planned part 4 Pouch 5 Pouch with spout

Claims (4)

Spout,
It consists of at least a spout body and a multilayer resin molding,
The spout body includes a pouring portion, a base portion, and the pouring portion and a pouring hole penetrating the base portion.
The multilayer resin molded body includes a cylindrical portion and a flange portion, and any layer other than the innermost layer is a functional resin layer,
The cylindrical portion has a top wall in which a communication planned portion is formed and is located in the extraction hole,
The spout is characterized in that the base is formed in substantially the same shape as the bottom of the base, and its outer peripheral edge can be welded or bonded to a pouch to which the spout is attached.   The spout according to claim 1, wherein the functional resin layer is a gas barrier resin layer.   The multilayer resin molding used for manufacture of the spout in any one of Claim 1 or 2.   A pouch with a spout to which the spout according to claim 1 is attached.

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