JP2015227192A - Lamination peeling container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To propose a lamination peeling container which makes peeling of an inner layer body from an outer layer body less likely to occur in a mouth part of the outer layer body.SOLUTION: A lamination peeling container of the invention includes: an outer layer body 1 including a flexible trunk part 4, which is connected with a bottom part 3, and a mouth part 5 having an upper part opening 6 and connected with the trunk part 4; and an inner layer body 2 which is laminated on the inner side of the outer layer body 1 so as to be peelable and covers a top wall 10 of the mouth part 5 through the upper part opening 6. The top wall 10 has a recessed part 11 which forms a shape recessed to the lower side with the internal layer body 2.

Description

  The present invention relates to a delamination container including an outer layer body including a flexible body and an inner layer body that is releasably stacked inside the outer layer body.

  As a container to store cosmetics such as lotion, shampoo, rinse, liquid soap, food seasoning, etc., an outer layer body having a flexible body and a peelable laminate inside the outer layer body A delamination container (also referred to as a delamination container) including an inner layer body capable of volume reduction and deformation is known. In such a delamination container, by applying a pressing force to the body portion, the inner layer body is directly or indirectly through the air in the inner space formed between the outer layer body and the inner layer body. The contents can be poured out from the pouring cap attached to the mouth of the outer layer body. When the pressing force is released, the internal space is decompressed along with the restoration of the body, and this causes outside air to be introduced from the outside air introduction holes provided in the mouth and bottom of the outer layer body, so that only the inner layer body is reduced. It can be put into a well-contained state.

JP 2014-091539 A

  By the way, in such a lamination peeling container, when peeling arises in the junction part of an outer layer body and an inner layer body, when the trunk | drum is pressed, the air of internal space will leak from the peeled part. Here, in the mouth portion of the outer layer body, as shown in FIG. 2 of Patent Document 1, the inner layer body entirely covers the top wall through the upper opening of the mouth portion, whereas the top wall extends horizontally. In order to prevent unintentional peeling, which is assumed when a strong force is applied to the mouth or an impact is applied, it is desirable to increase the bonding strength as much as possible.

  An object of the present invention is to solve such a problem, and the object of the present invention is to make it easier to cause the outer layer body and the inner layer body to peel off at the mouth of the outer layer body. A new delamination container is proposed.

The present invention includes an outer layer body that includes a body portion that is flexible and connected to the bottom portion, and an opening portion that has an upper opening and is connected to the body portion, and is peelably laminated on the inner side of the outer layer body. An inner layer covering the top wall of the mouth through the upper opening,
The top wall is a delamination container characterized in that the top wall has a recess that is recessed downward along with the inner layer body.

  It is preferable that the top wall includes an inner top wall that is located radially inside and has the concave portion, and an outer top wall that has a lower height than the inner top wall.

  It is preferable that the said recessed part is an annular groove provided continuously along the said upper opening.

  The recess is preferably a plurality of circular recesses provided intermittently along the upper opening.

  The recess is preferably a plurality of rectangular recesses provided intermittently along the upper opening.

  In this invention, since the recessed part which makes a concave downward is provided in the top wall in the opening | mouth part of an outer layer body with an inner layer body, the junction area of an outer layer body and an inner layer body can be increased. As a result, it is possible to make it more difficult for the outer layer body and the inner layer body to peel off.

  When the top wall is provided with an inner top wall that is located on the radially inner side and has the recess, and an outer top wall that has a lower height than the inner top wall, the inner top wall and the outer top wall Since the joint area between the outer layer body and the inner layer body can be increased by the level difference formed between them, it is possible to further prevent the outer layer body and the inner layer body from being separated.

It is a side view which shows one Embodiment of the lamination peeling container according to this invention. (A) is a perspective view of a recessed part about the lamination peeling container shown in FIG. 1, (b) is sectional drawing in alignment with AA shown to (a). (A) is a perspective view of a recessed part, (b) is sectional drawing which follows BB shown to (a) about other embodiment of the lamination peeling container according to this invention. According to still another embodiment of the delamination container according to the present invention, (a) is a perspective view of a recess, (b) is a plan view, and (c) shows a modification of (a) and (b). It is a top view.

  Hereinafter, the present invention will be described more specifically with reference to the drawings. In the present specification, claims, and abstract, “upper” is the side where the mouth is located with respect to the bottom of the outer layer body, and “lower” is the opposite side.

  FIG. 1 shows an embodiment of a delamination container according to the present invention. The delamination container includes an outer layer body 1 that forms an outer shell of the container, and an inner layer body 2 provided inside the outer layer body 1 as shown in FIG.

  The outer layer body 1 of the present embodiment is connected to a disc-shaped bottom portion 3 having a central portion curved inward, and an edge portion of the bottom portion 3 and extends upward with substantially the same diameter and then contracted. The body 4 has a diameter, and the mouth 5 is connected to the upper portion of the body 4 and has a cylindrical shape. The mouth portion 5 includes an upper opening 6 that opens upward, a screw portion 7 for holding a pouring cap (not shown), and an outer layer body 1 and an inner layer body 2 that penetrate the mouth portion 5 and An outside air introduction hole 8 is provided to communicate the internal space formed between them and the outside. In addition, it may replace with the screw part 7 and you may make it hold | maintain the extraction cap with an undercut part. Here, the trunk | drum 4 has flexibility, and while it bends inward by the external press, it can be restored | restored to the original shape, if a press is cancelled | released. Further, the body portion 4 is a vertical rib 9 for preventing the inner layer body 2 once peeled from coming into close contact with the outer layer body 1 (the cross-sectional shape thereof is convex outward from the outer surface of the body portion 4). Or may be concave toward the inside).

  The inner layer body 2 is laminated so as to be peelable from the outer layer body 1. The outer layer body 1 and the inner layer body 2 of this embodiment form a cylindrical laminated parison by co-extruding the synthetic resin forming the outer layer body 1 and the synthetic resin forming the inner layer body 2 in a molten state. It can be obtained by blow molding a laminated parison. A synthetic resin forming the outer layer body 1 and a synthetic resin forming the inner layer body are injection-molded to prepare a test tubular preform on which these synthetic resins are laminated, and this preform is biaxially stretched and blown. It can also be obtained by molding. Although not shown, one or more strip-like adhesive layers extending in the vertical direction are provided inside the outer layer body 1 so that the outer layer body 1 and the inner layer body 2 are partially bonded. It may be.

  As shown in FIGS. 2A and 2B, the inner layer body 2 covers the top wall 10 that is the upper end surface of the mouth portion 5 through the upper opening 6. The top wall 10 is provided with a recess 11 that is recessed downward along with the inner layer body 2. The top wall 10 includes an inner top wall 10a located on the radially inner side, and an outer top wall 10b located on the radially outer side than the inner top wall 10a and having a lower height than the inner top wall 10a. ing. Moreover, the recessed part 11 is provided in the inner side top wall 10a, and is provided as the annular | circular shaped annular groove 11a provided continuously along the upper opening 6 in this embodiment. The pouring cap attached to the mouth portion 5 is provided with a cylindrical seal wall that sandwiches the inner layer body 2 with the inner peripheral surface of the mouth portion 5. In the present embodiment, since the tapered portion 12 is provided between the inner peripheral surface of the mouth portion 5 and the top wall 10, this functions as a guide for the seal wall when the pouring cap is attached to the mouth portion 5.

  Various methods can be employed to form the annular groove 11a. For example, in blow molding, it can be formed by pushing a plug provided with a convex portion corresponding to the annular groove 11a from above into a laminated parison sandwiched between split molds. At this time, since the inner layer body 2 bites into the outer layer body 1 by this convex portion, the pressure-bonding strength of both increases and the outer layer body 1 and the inner layer body 2 are difficult to peel off. In addition, since the annular groove 11a is provided, the bonding area between the outer layer body 1 and the inner layer body 2 can be increased, so that it is possible to make it more difficult for the outer layer body 1 and the inner layer body 2 to peel off. In addition, since a step is formed between the inner top wall 10a and the outer top wall 10b, the joint area corresponding to the step is further increased, and it is possible to further prevent peeling. become.

  Various other recesses 11 may be employed. For example, as shown in FIGS. 3A and 3B, it can be configured as a plurality of circular concave portions 11 b provided intermittently along the upper opening 6. Also in this case, since the pressure bonding strength and the bonding area between the outer layer body 1 and the inner layer body 2 can be increased, it is possible to make the separation between the outer layer body 1 and the inner layer body 2 less likely to occur.

  Further, as shown in FIGS. 4A and 4B, it can be configured as a rectangular recess 11 c provided intermittently along the upper opening 6. In this case, even if it is provided as a rectangular shape as shown in FIG. 4 (b), the width becomes narrower toward the outside in the radial direction as indicated by reference numeral 11d in FIG. 4 (c). Such a trapezoidal shape may be provided. In addition, a trapezoidal shape whose width increases toward the outside in the radial direction may be used, or another polygonal shape may be used.

  The delamination container according to the present invention is not limited to these embodiments, and various modifications can be made within the scope according to the claims. For example, the outside air introduction hole 8 of the present embodiment is provided in the mouth portion 5, but the outer seam body 1 and the inner layer body 2 formed in the bottom portion 3 at the time of blow molding are connected to the joint (bottom seal portion), for example, outside. A pressing force is applied to form a bottom crack-shaped gap, and this gap may be used as an outside air introduction hole. The vertical rib 9 may be omitted.

  Moreover, the recessed part 11 may be provided in the range which covers the outer side top wall 10b beyond the inner side top wall 10a, and may be provided only in the outer side top wall 10b. Further, the step between the inner top wall 10a and the outer top wall 10b may be omitted, and the inner top wall 10a and the outer top wall 10b may have the same height.

  ADVANTAGE OF THE INVENTION According to this invention, the new lamination peeling container which can make it harder to produce peeling with the outer layer body and inner layer body in the opening part of an outer layer body can be provided.

DESCRIPTION OF SYMBOLS 1 Outer layer body 2 Inner layer body 3 Bottom part 4 Trunk part 5 Mouth part 6 Upper opening 7 Screw part 8 Outside air introduction hole 9 Vertical rib 10 Top wall 10a Inner top wall 10b Outer top wall 11 Recessed part 11a Annular groove 11b Circular recessed part 11c Square shape Concave (rectangular)
11d Square recess (trapezoidal shape)
12 Taper

Claims (5)

An outer layer body that has flexibility and is connected to the bottom portion, and an outer layer body that has an upper opening and is connected to the body portion, and is peelably laminated on the inner side of the outer layer body and through the upper opening. An inner layer covering the top wall of the mouth,
The delamination container according to claim 1, wherein the top wall has a recess that is recessed downward along with the inner layer body.   2. The delamination container according to claim 1, wherein the top wall includes an inner top wall that is located radially inside and has the concave portion, and an outer top wall that has a lower height than the inner top wall.   The delamination container according to claim 1 or 2, wherein the recess is an annular groove provided continuously along the upper opening.   The delamination container according to claim 1 or 2, wherein the recesses are a plurality of circular recesses provided intermittently along the upper opening.   The delamination container according to claim 1 or 2, wherein the recesses are a plurality of rectangular recesses provided intermittently along the upper opening.

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