Resin composite member

Abstract

[Problem] To provide a resin composite member capable of easily and reliably sealing a resin molded body without any gaps. [Solution] A resin composite member according to the present invention comprises a closing part 23 that has boat-shaped parts 23, 24, and a coating material 21 that is composed of a gas barrier packaging material using a flexible thermoplastic resin and that covers one side of the boat-shaped parts 23, 24, wherein: the boat-shaped parts 23, 24 have a pair of side surfaces 23b, 24b that are provided so as to bulge at an intermediate part and narrow at both ends, and one end surface 23c, 24c that is provided between the pair of side surfaces 23b on the one side; the one end surface 23c, 24c has a recessed shape that is inclined so as to recess toward the intermediate part when viewed from the side; and the coating material 21 is composed of one sheet material, is joined continuously to the one end surface 23c, 24c and a region adjacent to the end surface 23c, 24c of each side surface 23b, 24b, and adheres to the one end surface 23c, 24c and each side surface 23b, 24b without any gaps.

Description

Resin composite materials

[0001] The present invention relates to a resin composite member.

[0002] It has been known that in a container having a three-dimensional resin member as a stopper welded to a gas barrier material, the contents deteriorate due to air that permeates the resin member. For this reason, containers in which the stopper portion is covered with a gas barrier material have been proposed. For example, Patent Documents 1 and 2 listed below propose packaging bags in which the gas barrier packaging material of a packaging bag is extended to cover the three-dimensionally formed stopper portion.

[0003] Furthermore, Patent Document 3 listed below proposes a spout that is molded with a gas barrier intermediate layer.

[0004] JP 2014-218274 A JP 2020-147308 A JP 2012-162272 A

[0005] However, in the packaging bags described in Patent Documents 1 and 2, a large space is formed between the stopper and the covering packaging material. The stopper has a boat-like shape, and although the sides are in close contact with the container wall all around, the three-dimensional shape of the stopper prevents the end of the boat-like shape from being in close contact with the container wall. As a result, a large space is formed around the stopper, and air in the space can pass through the stopper, causing deterioration of the contents.

[0006] Furthermore, with the spout described in Patent Document 3, when resin molding the spout or cap, it is necessary to use a gas barrier material for the intermediate layer by co-injection molding, which poses the problem of time-consuming molding of the spout. In addition, since the intermediate layer having gas barrier properties does not reach the end of the spout or cap, it is not possible to completely prevent air from entering the container.

[0007] Therefore, an object of the present invention is to provide a resin composite member that can easily and reliably seal a resin molded body without any gaps.

[0008] The resin composite member of the present invention, which solves the above-mentioned problems, is a resin composite member comprising a resin molded body having a boat-shaped portion and a covering material made of a gas barrier packaging material using a flexible thermoplastic resin and covering one side of the boat-shaped portion, wherein the boat-shaped portion has a pair of side surfaces that bulge in the middle and narrow at both ends, and one end surface provided between the pair of side surfaces on one side, and the one end surface has a concave shape that slopes downward toward the middle portion in a side view, and the covering material is made of a single sheet material and is continuously joined to the one end surface and the areas adjacent to the end surface on each of the side surfaces, and is in close contact with the one end surface and each of the side surfaces without any gaps.

[0009] In the resin composite member of the present invention, the boat-shaped portion of the resin molding has a pair of side surfaces that bulge in the middle and narrow at both ends, and one end surface between the side surfaces has a concave end surface that slopes downward toward the middle in a side view. Therefore, even when a covering material made of a single sheet material is bonded to the end surfaces in close contact with each other and is continuously bonded to the areas of each side surface adjacent to the end surfaces in close contact with each other, the covering material does not wrinkle or lift.

[0010] This allows the end face of the boat-shaped portion and the adjacent areas on both sides to be continuously sealed with the covering material, easily and reliably. Furthermore, since the resin molding can be simply covered with the covering material after molding, the resin molding can be easily molded. Therefore, it is possible to provide a resin composite member that can easily and reliably seal the resin molding without gaps.

[0011] In the present invention, it is preferable that the one end face is formed in the shape of a pair of approximately isosceles triangles connected at their bases, and the covering material includes a square shape with one side having a length equal to or greater than the base and the other side perpendicular to the one side having a length equal to or greater than the sum of the heights of the pair of approximately isosceles triangles.

[0012] In this way, the covering material can be used to reliably seal one end face of the boat-shaped portion and the adjacent areas on both sides continuously without any gaps, making it possible to easily produce a resin composite member.

[0013] In the present invention, the resin molded body is a member attached to a container, and the outer surface of the coating material arranged on one end face is arranged so as to face the inside of the container, and the outer surfaces of the coating material arranged on the pair of side faces may be airtightly joined to the container wall.

[0014] In addition, in the present invention, the resin molded body may be a member attached to a container, and the outer surface of the coating material arranged on one end face may be arranged so as to face the outside of the container, and the outer surfaces of the coating material arranged on the pair of side faces may be airtightly joined to the container wall.

[0015] In this way, the covering material is reliably and continuously sealed around the end face and adjacent areas on both sides of the boat-shaped portion, without any gaps, making it possible to reliably seal one side of the boat-shaped portion airtight. Therefore, even when attached to a portion that separates the inside and outside of a container, such as a spout, the covering material can airtightly separate the inside and outside of the container. For example, because the covering material can reliably seal even if a through hole is provided in the resin molded body, it is easy to provide a through hole in the resin molded body.

[0016] According to the present invention, it is possible to provide a resin composite member that can easily and reliably seal a resin molded body without any gaps.

[0017] FIG. 1 is a front view of a spouted container according to a first embodiment of the present invention. FIG. 2 shows a spout of the spouted container according to the first embodiment of the present invention, where (a) is a perspective view and (b) is a vertical cross-sectional view. FIG. 3 shows a spout body of the spout of FIG. 2, where (a) is a perspective view and (b) is a vertical cross-sectional view. FIG. 4 shows a closure portion of the spout of FIG. 2, where (a) is a perspective view and (b) is a vertical cross-sectional view. FIG. 5 shows a coating material that covers the closure portion of the spout according to the first embodiment of the present invention, where (d) is a view showing the coating material. FIG. 6 shows a method of coating the closure portion of the spout according to the first embodiment of the present invention with a coating material. FIG. 7 shows a method of manufacturing the spouted container according to the first embodiment of the present invention. FIG. 8 shows a state in use of the spouted container according to the first embodiment of the present invention. FIG. 9 shows a side view of the spout body and closure portion of the spout according to a second embodiment of the present invention. FIG. 10 shows a state in use of the spouted container according to the second embodiment of the present invention.

[0018] [First embodiment] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In this embodiment, a spout will be used as an example of a resin composite member. Fig. 1 is a side view of a spouted container in which the spout of this embodiment is used.

[0019] The spout-equipped container 10 comprises a storage section 12 formed by a container wall 11 made of a flexible packaging material with gas barrier properties, a spout 20 as a resin composite member joined and attached to the container wall 11, and a covering material 21 made of a flexible packaging material with gas barrier properties and covering at least a portion of the spout 20.

[0020] The storage section 12 is configured by a pair of container walls 11 sealed at their outer periphery by a peripheral seal 13. The packaging material that forms the container walls 11 of the storage section 12 is made of a gas barrier sheet using a flexible resin, and may be a laminated sheet provided with a gas barrier layer such as an aluminum layer. The storage section 12 contains various liquids, viscous liquids, gel-like substances, powders, and other contents that change due to oxidation or due to moisture absorption or drying.

[0021] As shown in Figures 2(a)(b) to 4(a)(b), the spout 20 comprises a spout body 22 joined to the container wall 11, and a closure portion 23 which is a boat-shaped portion removably attached to the spout body 22 so as to close the spout body 22.

[0022] The spout body 22 and the closing portion 23 are made of resin molded bodies and each have a boat-like shape. Although the two may be molded integrally, in this embodiment, the spout body 22 and the closing portion 23 are molded separately and then combined integrally.

[0023] As shown in Figures 3(a) and (b), the spout body 22 is integrally molded from a base portion 24 that has a boat-shaped shape in plan view and has the container wall 11 tightly joined to its side periphery, a large-diameter protruding portion 25 that protrudes upward from the base portion 24 and has a male thread 25a that can be threaded into the closure portion 23, and a connecting portion 26 that protrudes upward from the protruding portion 25 and is formed with a smaller diameter than the protruding portion 25 and has a locking structure 26a that can be used to connect other components when the spout-equipped container is in use.

[0024] 1, the sides of the base portion 24 are covered by the container wall 11, and are continuously welded and joined to the inner surface of the container wall 11 over the entire periphery. The welded surface may be provided with an uneven portion 27 or the like.

[0025] The connecting portion 26 is provided with a locking structure for locking the tube during use. This locking structure may be compliant with ISO 80369-3, which allows connection to an ISO standard tube connector or the like.

[0026] A hollow portion 28 is provided inside base portion 24 and protruding portion 25, and a through-hole 29 is provided inside connecting portion 26, and the interior of spout body 22 is penetrated vertically by hollow portion 28 and through-hole 29. The lower end of through-hole 29 opens into storage portion 12, and the upper end is closed by closing portion 23.

[0027] As shown in Figures 4(a) and 4(b), the boat-shaped closure 23 is a resin molded body disposed at the end of the spout 20. The closure 23 has a pair of side surfaces 23b that bulge in the middle and narrow at both ends, and an upper end surface 23c that is provided between the pair of side surfaces 23b at the top. The periphery of the side surface is provided with an uneven portion 27 such as a groove similar to that of the spout body 22.

[0028] The upper end surface 23c of the closing portion 23 has a concave shape that slopes downward toward the middle portion in side view. The concave shape is formed so that the height of the closing portion 23 in the vertical direction gradually decreases toward the middle portion. In this embodiment, the concave shape is formed by a pair of flat surfaces that slope toward the middle portion, and in plan view, a pair of approximately isosceles triangles are formed with their bases connected. Here, the approximately isosceles triangle may be any shape that includes an isosceles triangle and a shape that can be considered an isosceles triangle in terms of manufacturing the spout 20.

[0029] The inside of the blocking portion 23 is provided with a threaded portion 33 having a female thread 33a that can be threaded with the male thread 25a of the protrusion 25 of the spout body 22, a storage portion 34 that can store and lock the locking structure 26a of the connecting portion 26 by inserting and screwing the connecting portion 26 of the spout body 22, and a closing portion 35 that liquid-tightly blocks the through hole 29 of the spout body 22.

[0030] The closing portion 35 is provided with an insertion portion 36 that is inserted into the through-hole 29, and the insertion portion 36 is provided with a through-hole 37 that opens at the upper end surface 23c and extends along both side surfaces 23b and vertically penetrates the closing portion 23. An opening 37a at the upper end of this through-hole 37 is sealed by a covering material 21, which will be described later.

[0031] Spout body 22 and closing portion 23 are combined and integrated by threading threaded portion 33 of closing portion 23 onto protruding portion 25 of spout body 22. They can be integrated by rotating them in one direction relative to spout body 22, and can be separated by rotating them in the other direction.

[0032] In the integrated state, base portion 24 and closing portion 23 of spout body 22 are arranged so as to overlap in a plan view in the same orientation. Spout body 22 and closing portion 23 are pressed against each other to maintain that orientation.

[0033] In this state, the side periphery of closure portion 23 on the spout body 22 side and the side periphery of spout body 22 on the closure portion 23 side are preferably molded to the same shape so that their external shapes are arranged adjacent to each other without any step, and in this embodiment, the entire external shape of closure portion 23 has the same boat-shaped shape in plan view as base portion 24 of spout body 22. Therefore, when closure portion 23 is attached to spout body 22 and arranged adjacent to it, the entire spout 20 has a columnar external shape with a constant boat-shaped shape that is substantially continuous along its entire length.

[0034] The covering material 21 is made of a packaging material made of flexible resin and has gas barrier properties, and is welded to the surface of the closing portion 23 to tightly and securely cover the upper end surface 23c of the closing portion 23. In this embodiment, the covering material 21 is continuously joined to the upper end surface 23c and to the regions of each side surface 23b adjacent to the upper end surface 23c, and is tightly and securely attached to the upper end surface 23c and each side surface 23b.

[0035] In the covering material 21 of this embodiment, the outer surface of the covering material 21 arranged on the upper end surface 23c is arranged so as to face the outside of the spouted container 10. The outer surfaces of the covering material 21 arranged on the pair of side surfaces 23b are airtightly joined to the container wall 11.

[0036] The packaging material constituting the covering material 21 is made of a single sheet material using a flexible resin and having gas barrier properties, and may be a resin laminate sheet provided with a gas barrier layer such as an aluminum layer. The laminate sheet provided with the gas barrier layer has some stretchability to the extent that the gas barrier layer is not ruptured. The innermost layer is provided with a sealant layer made of a resin that can be welded to the closure portion 23, and the outermost layer is provided with a sealant layer made of a resin that can be welded to the innermost layer of the container wall 11 that constitutes the storage portion 12.

[0037] The covering material 21 includes a rectangular shape having one side longer than the base of an approximately isosceles triangle and the other side perpendicular to the one side having a length longer than the sum of the heights of the pair of approximately isosceles triangles. In this embodiment, the covering material 21 is formed into a rectangular shape of such size.

[0038] 5(a), the blocking portion 23, which is the boat-shaped portion to be covered in this embodiment, is formed in a diamond-shaped columnar shape in a plan view, and has a concave shape that slopes downward toward the middle when viewed from the side. The shape of one side of the blocking portion 23 relative to the central axis L in the longitudinal direction is approximately an isosceles triangle at the top as shown in FIG. 5(b), and both side portions are trapezoidal as shown in FIG. 5(c).

[0039] Let W be the width from the center of blocking portion 23 in a plan view, T be the thickness of blocking portion 23, i.e., the length of the base of the approximately isosceles triangle, H be the height at both ends of blocking portion 23, h be the height of blocking portion 23 in the concave shape, and Is be the width from the center along the surface of the concave shape, i.e., the height of the approximately isosceles triangle. In this embodiment, in order for a single rectangular covering material 21 to continuously join top end surface 23c and the areas of both side surfaces 23b adjacent to top end surface 23c, it is preferable that one side of the rectangular shape be equal to or greater than the length of the base T and that the other side perpendicular to this side be equal to or greater than the sum of the heights of the pair of approximately isosceles triangles, 2Is. By arranging rectangular covering material 21 along the thickness direction of blocking portion 23, it is possible to cover the top end surface of blocking portion 23.

[0040] In this case, if the length of one side of the covering material 21 is the length T of the base of the approximately isosceles triangle and the length of the other side is the sum 2Is of the heights of the pair of approximately isosceles triangles, the upper edges of both side surfaces 23b can be covered with the covering material 21.

[0041] Furthermore, when the covering material 21 is used to cover the entire top end surface 23c and both side surfaces 23b of the blocking portion 23, the rectangular covering material 21 will be as follows. First, the area of ​​the top surface of one half of the blocking portion 23 relative to the axis L is 1 / 2 × T × W, and the area of ​​one side surface is W / 2 × (H + h). Therefore, the area of ​​the covering material 21 covering one half of the blocking portion 23 relative to the axis L is 2 × H × W. As shown in FIG. 5( d ), the covering material 21 has a rectangular shape with a pair of side edges having a length of 2W, one of the other pair of side edges having a length of T + 2h, and the other having a length of 2H. If the covering material 21 is longer than this, the entire top end surface 23c and both side surfaces 23b of the blocking portion 23 can be covered.

[0042] 5, the pair of isosceles triangles are bent at the position of axis L in the middle of upper end surface 23c, and each vertex of the diamond of upper end surface 23c, as well as the portion between upper end surface 23c and each side surface 23b and the middle portion of each side surface 23c are shown as bent shapes, but the shapes of each of these portions may be curved shapes with an R. Furthermore, the pair of equal sides of the pair of isosceles triangles do not need to be straight, and may be curved shapes with an R.

[0043] The size and angle of the R shape in these shapes can be set arbitrarily as long as they are within a range in which the layer having gas barrier properties is not damaged due to the stretching of the coating material 21 when the coating material 21 is welded so as to be tightly adhered without any gaps.

[0044] In this way, the approximately isosceles triangle in this embodiment can be covered by the covering material 21 in the same way as an isosceles triangle due to the stretching of the covering material 21 when the covering material 21 is welded so that it is tightly adhered without any gaps, and includes a shape that can be considered an isosceles triangle in terms of manufacturing the spout 20.

[0045] In addition, in this embodiment, the blocking portion 23, which is a boat-shaped portion, is positioned adjacent to the upper part of the spout body 22, so that the lower edge of the blocking portion 23 is formed in a straight shape when viewed from the side, but the shape of the lower edge is arbitrary, and it is also possible to form the shape of the covering material 21 that covers the entire both side surfaces 23b into various shapes corresponding to the lower edge.

[0046] In this embodiment, such a spout 20 can be manufactured by combining a pre-formed spout body 22 and a blocking portion 23 into one unit, and then tightly covering the blocking portion 23 with a covering material.

[0047] As shown in FIG. 6( a), a rectangular covering material 21 is positioned in a recessed shape formed in the upper part of the blocking portion 23, and is then heated and pressed with an upper heat-sealing mold 41 having a shape corresponding to the recessed shape in the upper part of the blocking portion 23 to weld the covering material 21 in close contact with the entire upper part of the blocking portion 23.

[0048] 6(b), both end portions of the covering material 21 welded to the upper surface of the closure portion 23 are bent to face both sides of the side periphery of the closure portion 23, and the end portions are aligned and positioned. The covering material 21 is sandwiched between the closure portion 23 and a pair of side periphery heat-sealing dies 42 having a shape corresponding to the side periphery of the closure portion 23, and is heated and pressed to weld the covering material 21, thereby tightly bonding the covering material 21 to the entire side periphery of the closure portion 23.

[0049] As a result, as shown in Figure 6 (c), one sheet of covering material 21 can be welded in a tight, tightly adhered state without any gaps, without causing wrinkles or lifting around the upper and side edges of the blocking portion 23, and the spout 20 can be manufactured.

[0050] To manufacture a spout-equipped container 10 using the spout 20 manufactured in this manner, as shown in Figure 7(a), the spout 20 with the closure portion 23 covered with the covering material 21 is inserted between the container wall sheet materials 43, and the entire spout 20 is positioned at the end between the container wall sheet materials 43.

[0051] Next, as shown in FIG. 7( b ), with the entire spout 20 sandwiched between container wall sheet materials 43 , the edge on one end is heat-sealed over a width equal to or greater than the spout 20 .

[0052] This causes a pair of container wall sheet materials 43 to be welded to the welding surfaces around the entire side periphery on both sides of base portion 24 of spout body 22. A pair of container wall sheet materials 43 is also welded to closure portion 23 so as to be continuous with spout body 22. Since covering material 21 tightly covers closure portion 23, covering material 21 on both surfaces of closure portion 23 is welded to the pair of container wall sheet materials 43.

[0053] The container wall sheet materials 43 are also heat-sealed by facing each other at the same width in the areas where the spouts 20 are not located. As a result, the entire edge where the spouts 20 are located is welded and closed over a wide area, continuing from the left and right peripheral seals 13 of the pair of container wall sheet materials 43, thereby forming the spout-side peripheral seal 13 over the entire width.

[0054] Thereafter, as shown by the dashed lines in Figure 7(b), the spout-side peripheral seal 13 is cut away from both the left and right sides of the spout 20 to form the shape of the container. Then, as shown in Figure 7(c), notches 14 are formed on both side edges of the container wall 11 covering the spout 20 at positions corresponding to the boundary 38 between the base portion 24 and the closure portion 23 of the spout body 22, and a slit thinner than the thickness of the packaging material is formed along the boundary 38 by laser processing, forming an easy-to-break line 15. This makes it possible to manufacture an empty spout-equipped container 10 with an open bottom. To use the spout-equipped container 10, the contents can be placed in the storage portion 12 by placing an item in the storage portion 12 and heat-sealing the bottom to close it.

[0055] When using the container, as shown in Figure 8, the blocking portion 23 can be separated and removed from the spout body 22 and the contents can be directly discharged from the through hole 29 of the spout body 22, or as shown by the imaginary line, the connector of the tube 44 for discharging the contents can be connected to the connecting portion 26 and the contents can be discharged from the tube 44.

[0056] In spout 20 as a resin composite member as described above, closing portion 23 as a boat-shaped portion has a pair of side surfaces 23b that bulge in the middle and narrow at both ends, and upper end surface 23c provided between side surfaces 23b has a concave shape that slopes downward toward the middle in a side view. Therefore, even when covering material 21 made of a single sheet material is bonded in close contact with upper end surface 23c and is bonded continuously to regions of each side surface 23b adjacent to upper end surface 23c in close contact, covering material 21 does not wrinkle or lift.

[0057] This allows the upper end surface 23c of the blocking portion 23 and the adjacent areas of both side surfaces 23b to be continuously and easily and reliably sealed with the covering material 21. Moreover, since the resin molded body can be covered with the covering material after molding, the resin molded body can be easily molded.

[0058] Therefore, it is possible to provide a resin composite member that can easily and reliably seal a resin molded body without any gaps, and by using it in the spout 20 of a container that requires barrier properties, as in this embodiment, a higher level of gas barrier properties can be achieved for the entire container, and particularly preferably, complete gas barrier properties can be achieved.

[0059] By continuously sealing the upper end surface 23c of the closure portion 23 and the adjacent areas of both side surfaces 23b with the covering material 21, wrinkles or lifting do not occur in the covering material 21 arranged on the surface of the closure portion 23, thereby improving the appearance quality of the spout 20 in the covered state. Furthermore, it is possible to prevent the contents from adhering to or remaining in the wrinkles or lifting of the covering material 21.

[0060] Furthermore, the airtightness is not reduced by minute gaps caused by wrinkles, lifting, etc., and a reliable sealed structure can be achieved by the gas barrier covering material 21. Furthermore, there is no risk of the airtightness being deteriorated by damage caused by wrinkles, lifting, etc.

[0061] In this embodiment, the upper end surface 23c on one side is formed in the shape of a pair of isosceles triangles connected at the base, and the covering material 21 has a rectangular shape, one side of which is longer than the base, and the other side perpendicular to the one side has a length greater than the sum of the heights of the pair of isosceles triangles.

[0062] Therefore, the rectangular covering material 21, which is easy to manufacture and handle, can reliably and continuously seal the upper end surface 23c of the blocking portion 23 and the adjacent areas of both side surfaces 23b without any gaps, making it easy to manufacture the spout 20.

[0063] In this embodiment, the closing portion 23 has a through-hole 37 that opens at the upper end surface 23c and penetrates the closing portion 23 in a direction along both side surfaces 23b, and the opening 37a of the through-hole 37 at the upper end surface 23c is sealed by the covering material 21. The closing portion 23 is a member that is attached to the container, and the outer surface of the covering material 21 arranged on the upper end surface 23c is arranged so that it faces the outside of the container, and the outer surface of the covering material 21 is airtightly joined to the container wall 11.

[0064] Therefore, covering material 21 is reliably and continuously sealed without any gaps on top end surface 23c of closing portion 23 and adjacent regions on both side surfaces 23b, so that covering material 21 can airtightly separate the inside and outside of the container and can reliably airtightly seal opening 37a of through-hole 37. Even when attached to a portion that separates the inside and outside of the container, covering material 21 can provide airtight closure, and a container that is airtightly closed on the outside side of the container can be obtained, and through-hole 37 can be easily provided in closing portion 23 for manufacturing reasons, etc.

[0065] Second Embodiment FIG. 9 shows a spout according to a second embodiment, and FIG. 10 shows a spouted container using the spout.

[0066] Similar to the first embodiment, the spout 20 of the second embodiment includes a spout body 22 joined to the container wall 11 and a closure portion 23 disposed adjacent to and in close contact with the spout body 22 so as to close the spout body 22. The spout body 22 and the closure portion 23 are made of a resin molded body, and each has a boat-like shape in plan view.

[0067] The second embodiment differs from the first embodiment in that the base portion 24 of the spout body 22 is covered with the covering material 21 , and the closing portion 23 is not covered with the covering material 21 .

[0068] As in the first embodiment, the spout body 22 is integrally molded from a base portion 24 which has a boat-shaped shape in a plan view and whose side periphery is positioned and joined between a pair of container walls 11, a large-diameter protruding portion 25 which protrudes upward from the base portion 24 and has a male thread 25a which can be threaded into the closure portion 23, and a connecting portion 26 which protrudes upward from the protruding portion 25 and is formed with a smaller diameter than the protruding portion 25 and has a locking structure 26a which can be used to connect other components such as a tube when using the spout-equipped container.

[0069] The base portion 24 in the second embodiment has a pair of side surfaces 24 b that bulge in the middle and narrow at both ends, and a bottom surface 24 c that is provided between the pair of side surfaces 24 b at the bottom. In this embodiment, the bottom surface 24 c side of the base portion 24 is sealed with the covering material 21.

[0070] The lower end surface 24c of the base portion 24 has a concave shape that slopes upward toward the middle portion in a side view. The concave shape is formed so that the vertical height of the base portion 24 of the spout body 22 gradually decreases toward the middle portion.

[0071] This concave shape is the same as in the first embodiment, and is composed of a pair of flat surfaces that are inclined toward the middle portion, and in plan view is formed into the shape of a pair of isosceles triangles whose bases are continuous.

[0072] The covering material 21 is a rectangular packaging material made of flexible resin with gas barrier properties, and is formed in the same manner as in the first embodiment. This covering material 21 is welded to the surface of the base portion 24, thereby tightly and securely covering the lower end surface 24c of the base portion 24. In this embodiment, the covering material 21 is continuously joined to the lower end surface 24c and to the areas of each side surface 24b adjacent to the lower end surface 24c, and tightly and securely covers the lower end surface 24c and each side surface 24b.

[0073] In this embodiment, the outer surface of the covering material 21 arranged on the lower end surface 24 c is arranged so as to face the inside of the storage section 12 of the spouted container 10 .

[0074] The outer surfaces of the covering material 21 arranged on the pair of side surfaces 24b are arranged between the pair of vessel walls 11 together with the base portion 24 and welded together to form an airtight bond.

[0075] As in the first embodiment, the blocking portion 23 is formed so as to be able to be screwed onto the protrusion 25 of the spout body 22, and is configured so as to be able to liquid-tightly block the through hole 29 of the spout body 22 by being screwed together.

[0076] The outer periphery of the blocking portion 23 is formed in a boat-shaped shape that is approximately the same as the outer periphery shape of the spout body 22, and by screwing them together to form a single unit, the outer shapes of the two are arranged adjacent to each other without any steps, and the entire spout 20 has a columnar outer shape in which the boat-shaped shape is essentially continuous along its entire length.

[0077] In a spouted container 10 equipped with such a spout 20, the closure portion 23 can be separated and removed from the spout body 22 for use, as shown in Figure 10. In this case, the covering material 21, which is welded to the lower end surface 24c of the base portion 24 so as to close the through-hole 29 inside the storage portion 12, can be opened by inserting a puncturing member or the like (not shown) into the through-hole 29 and puncturing it. This makes it possible to discharge directly from the through-hole 29 of the spout body 22, or to connect a discharge tube 44 to the connecting portion 26 for use in discharging.

[0078] Such a spout 20 can also provide the same effects as those of the first embodiment. Moreover, in this embodiment, the outer surface of the covering material 21 arranged on the lower end surface 24c is arranged so as to face the inside of the container, and the outer surfaces of the covering material 21 arranged on the pair of side surfaces 24b are airtightly joined to the container wall 11.

[0079] Therefore, by attaching spout 20 to the portion that separates the inside and outside of the container, spouted container 10 can be obtained in which through-hole 29 in base portion 24, which is the boat-shaped portion, is airtightly closed on the inside. This allows a container that can be opened and used by using a puncturing member to puncture covering material 21 that closes through-hole 29 on the inside of the container.

[0080] The above-described embodiments can be modified as appropriate within the scope of the present invention. For example, although the spout 20 having the spout body 22 and the closure portion 23 is exemplified as the resin composite member in the above, other members may be used, and the present invention can be similarly applied to any member in which a resin molded body having a boat-shaped portion is covered with a flexible covering material having gas barrier properties.

[0081] Furthermore, the resin composite member does not need to be a member made up of multiple parts, such as the above-mentioned spout body 22 and closure portion 23, but may be a member made up of a single part. For example, the resin composite member may be a spout in which spout body 22 without closure portion 23 in FIG. 9 is covered with covering material 21, or may be a member in which a resin molded body consisting only of closure portion 23 is covered with covering material 21.

[0082] Furthermore, in the above embodiments, an example of a rectangular sheet material having a predetermined size has been described as the covering material 21, but there are no particular limitations on the shape of the covering material 21. That is, the shape of the covering material 21 can be selected arbitrarily as long as it is a sheet material having a size that includes at least a portion of a rectangle, one side of which has a length equal to or greater than the bases of a pair of isosceles triangles, and the other side perpendicular to the one side has a length equal to or greater than the sum of the heights of the pair of isosceles triangles.

[0083] DESCRIPTION OF SYMBOLS 10 Container with spout 11 Container wall 12 Storage section 13 Peripheral seal 14 Notch 15 Easy-to-break line 20 Spout 21 Covering material 22 Spout body 23 Closing section 23b Side surface 23c Upper end surface 24 Base section 24b Side wall 24c Lower end surface 25 Protruding section 26 Connecting section 27 Uneven section 28 Hollow section 29 Through hole 33 Threaded section 34 Storage section 35 Closing section 36 Insertion section 37 Through hole 37a Opening 38 Boundary 41 Mold for upper heat sealing 42 Mold for side peripheral heat sealing 43 Sheet material for container wall 44 Tube

Claims

1. A resin composite member comprising a resin molded body having a boat-shaped portion, and a covering material made of gas barrier packaging material using a flexible thermoplastic resin and covering one side of the boat-shaped portion, wherein the boat-shaped portion has a pair of side surfaces that bulge in the middle and narrow at both ends, and one end surface provided between the pair of side surfaces on the one side, and the one end surface has a concave shape that slopes down toward the middle portion in a side view, and the covering material is made of a single sheet material that is continuously bonded to the one end surface and areas of each of the side surfaces adjacent to the one end surface, and is in close contact with the one end surface and each of the side surfaces without any gaps.

2. A resin composite member according to claim 1, characterized in that said one end face is formed in the shape of a pair of approximately isosceles triangles connected at their bases, and said covering material includes a rectangle with one side having a length equal to or greater than said bases and the other side perpendicular to said one side having a length equal to or greater than the sum of the heights of said pair of approximately isosceles triangles.

3. The resin composite member described in claim 2, characterized in that the resin molding is a component to be attached to a container, the outer surface of the covering material arranged on one end face is arranged facing the inside of the container, and the outer surfaces of the covering material arranged on the pair of side faces are airtightly joined to the container wall.

4. The resin composite member described in claim 2, characterized in that the resin molding is a component to be attached to a container, the outer surface of the coating material arranged on one end face is arranged to face the outside of the container, and the outer surfaces of the coating material arranged on the pair of side faces are airtightly joined to the container wall.

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