JPH0448461B2 - - Google Patents

Description

[Detailed description of the invention] (a) Purpose of the invention [Field of industrial application] This invention relates to an infusion container with a window,
This is a packaging container for infusions used for drips, etc.

[Prior Art] Recently, pouch containers, which are lighter, easier to handle, and cheaper than glass containers, are sometimes used as infusion containers. In particular, materials made of laminated film materials consisting of plastic film and aluminum foil are easy to handle, and have gas barrier properties similar to glass, as well as greater light-shielding properties than glass. The contents can be shielded from light and external light for a long period of time, and the contents have excellent storage stability.

In such an infusion container, the level of the content drops as the content is taken out from the content outlet formed at the bottom and used, but it is necessary to make it possible to visually check the level of the content. be.

For this reason, conventional methods have been considered, such as containers with a partially transparent window in the body, or containers with a liquid level gauge as a separate part (Patent Application No. 069682, filed in 1985 by the present applicant, "Infusion Container"). It is being

[Problems to be Solved by the Invention] However, when a transparent window portion is provided, this transparent portion does not have light blocking properties and does not have perfect gas barrier properties, so the preservation of the contents is insufficient. Furthermore, when a liquid level gauge is provided as a separate part, there is a problem in that it is somewhat more troublesome to handle and store than when no separate part is provided.

This invention was made in view of the above circumstances, and is lightweight, easy to handle, and inexpensive.
The object of the present invention is to provide a window-equipped infusion container that has excellent light-shielding properties and gas barrier properties, has high content preservation properties, and does not require physical parts, thereby eliminating the trouble associated with separate parts.

(b) Structure of the invention [Means for solving the problem] In response to this purpose, the infusion container with a window of the present invention is constructed of a laminated material of plastic film and metal foil, and has a content outlet at the bottom. An infusion container having a window for displaying the content level in the body, the window facing upward from near the outlet, and a hole formed in the base material passing through the front and back of the first inner lining. The first inner lining material is heat-sealed and adhered to the back surface of the base material at the peripheral edge of the hole to close the hole. The second inner lining material is made of a transparent or translucent material and is heat-sealed and bonded to the back surface of the first inner lining material and/or the base material at the peripheral edge of the hole. The adhesive material covers the inner surface of the portion facing the hole, and the strip tab material is made of a laminated material of plastic film and metal foil, and is heat-sealed and bonded to the surface of the first inner adhesive material through the hole. It is characterized by

Hereinafter, details of the present invention will be explained with reference to the drawings showing one embodiment.

In FIGS. 1 and 2, 1 is an infusion container with a window. The window-equipped infusion container 1 is a standing pouch made of a laminated film of plastic film and aluminum foil, and a bottom piece 4 folded in half with the folded side facing up is sandwiched between a front piece 2 and a back piece 3. A side seal is applied to the seal part 5 and a bottom seal is applied to the bottom seal part 6 to form a bag shape.

A spout 7 is attached to the center of the bottom piece 4. As shown in FIG. 3, the spout 7 is configured to communicate between the inside and outside of the container by piercing a hollow needle-like body 8, and to take out the contents through a tube connected to the hollow needle-like body 8. This is the outlet.

In the center of the body of the front piece 2, there is a window 1 extending upward from near the bottom seal part 6 for displaying the content level.
1 is formed.

That is, a hole 12 is formed in the center of the body of the front piece 2 through the front and back of the base material, and the lower end of the hole 12 is located at the bottom of the body of the front piece 2, which is the position closest to the spout 7. It has an elongated shape extending upward from the vicinity of the seal portion 6, and its length is desirably approximately 3/4 to 4/5 or less of the height of the windowed infusion container 1. Further, the width of the hole 12 is preferably 3 mm or more and 20 mm or less, which is a necessary and sufficient width that allows the liquid level height to be visually observed.

The hole 12 is covered with strip tab material 1 in order from the surface side.
3, the first inner lining material 14, and the second lining material 15.

The first inner patch material 14 is attached to the back side of the front piece 2 at the peripheral edge of the hole 12 by means such as heat sealing to close the hole 12, for example, from the front side as the front piece 2. Thickness 12μ
PET (polyethylene terephthalate), thickness 15μ
Nylon, 7μ thick aluminum foil, 70μ thick
In the case of using a laminated film in which CPP (unstretched polypropylene) is sequentially laminated, for example, unstretched polypropylene (block copolymer type or random copolymer type) with a thickness of 70 μm can be used as the first inner patch material.

The second inner lining material 15 is made of a transparent or translucent material, for example, unstretched polypropylene with a thickness of 70 μm, which is the same material as the first inner lining material. Paste it on the back side and
It covers the inner adhesive material 14. That is, the first inner adhesive material 14 is attached in the adhesive area 16 along the edge of the hole 12, and the second inner adhesive material 15 is attached to the front piece in the annular adhesive area 17 outside the adhesive area 16. 2, and is configured so that even if the first inner adhesive material 14 is destroyed, the contents will not be exposed from the hole 12.

In the example shown in FIG.
The adhesion area 17 to the second peripheral edge is separate from the adhesion area 16 of the first inner patch material, but part or all of the adhesion area 17 may overlap with the adhesion area 16. In this case, the second inner adhesive material 15 will be adhered to the back surface of the first inner adhesive material 14, but the adhesive area 17 will not cover the inside of the hole 12, and therefore the second inner adhesive material 15 will A gap 18 exists between the inner adhesive material 15 and the portion of the first inner adhesive material 14 that faces the hole 12 .

The band-shaped tab material 13 is made of a light-shielding material, for example, the same material as the front piece 2, and is pasted to the pasting area 21 on the surface of the first inner pasting material 14 through the hole 12, so as to cover the hole 12. There is. The band-shaped tab material 13 has a width sufficient to prevent light from entering the window 13 by overlapping the surface of the front piece 2 at its peripheral edge, and its upper end is closer to the upper end 12b of the hole 12. , has a length that can cover the upper part, and forms the knob part 13a.

[Function] When the window-equipped infusion container 1 configured as described above is filled with contents and then top-sealed, the contents are wrapped on the entire surface with a material containing aluminum foil having light-shielding and gas-barrier properties. The quality will be maintained over a long period of time.

When using the contents, pinch the tab 13a of the strip tab material 13 and pull it in the peeling direction 22 of the strip tab material 13.
The first inner adhesive material 14 attached to the strip tab material 1
Trying to rise following 3. However, the first inner adhesive material 14 is adhered to the back surface of the front piece 2 in an adhesive area 16, and this portion cannot follow the band-shaped tab material 13 and rise.

The first inner lining material 14 has a gap 18 between it and the second inner lining material 15 in the part facing the hole 12, and the lower surface of this part is not bonded to any other material, so it will not break. As the band-shaped tab material 13 rises, the first inner lining material 14 easily breaks along the lower edge 2a of the periphery of the hole 12 in the front piece 2.

Even after the first inner lining material 14 is destroyed, the window 11 is still kept sealed by the second inner lining material 15. However, since the inner adhesive material 15 is transparent or semi-transparent, the contents can be visually observed through the inner adhesive material 15. In this state, the hollow needle-shaped body 8 is attached to the spout 7.
By piercing the container, it is possible to visually check the drop in the liquid level as the contents are consumed. The bottom piece 4 has a shape in which the spout part is the most descended,
Since the hole 12 has a lower end 12a near the spout 7, the liquid level can be checked to the end, and checking the liquid level does not require any separate parts and is troublesome.

The spout is preferably located in the center in terms of the strength of the container, but the following experimental example shows that it is appropriate to position the window 11 near the spout in terms of both the strength of the container and the ease of visual visibility. It is shown by.

[Experimental example] The following experimental example is based on eight conditions: the base material of the standing pouch, the strip tab material, the first inner lining material, the second inner lining material, the size of the standing pouch, the size of the window hole, and the window position spout. The following are the results of evaluating the following three things when changing various values: (1) horizontal drop strength of the bag, (2) tab peelability, and (3) retort resistance.

In addition, the shape of the window is 7mmR roundness 4
It was placed in the corner and had good initial and final releasability.

Experimental examples indicate desirable examples, and ~ indicate unsuitable examples.

Experimental example 12μPET/15μNylon/7μ Al/70μCPP (unstretched) 12μPET/15μNylon/7μ Al/70μCPP 70μ unstretched polypropylene (block copolymer type) 70μ unstretched polypropylene (block copolymer type) 160mm (width) x 290mm (height) ×40mm (bottom diameter) 15mm (width) ×180mm (length) (width is 5mm to 25mm
25mm from the bottom and 70mm from the side parts Attach a 10mmφ spout (PP) to the center of the bottom piece using heat sealing.

Evaluation (1) 1 filled with water, dropped twice from a height of 1.2 m, number of pieces n = 10, no leakage and bag breakage (2) 0.5 to 1.5 Kg/tab (good) (3) 45 minutes at 121℃ after 1 filled with water Experimental example with no retort abnormality 12μPET/15μNylon/7μ Al/70μCPP 12μPET/15μNylon/7μ Al/70μCPP 70μ unstretched polypropylene (random copolymer type) 70μ unstretched polypropylene (block copolymer type) 160mm (width) x 290mm (height) x 40mm (bottom fold diameter) 15mm (width) x 180mm (length) 25mm from the bottom, 70mm from the side Attach a 10mmφ spout to the center of the bottom piece with heat seal.

Evaluation (1) 1 fill with water, dropped twice from 1.2m height Number of pieces n = 10 0/10 (no bag breakage) (2) 0.3~1.0Kg/tab (very good) (3) After 1 fill with water, Experimental example of no retort abnormality for 45 minutes at 121℃ 12μPET/15μNylon/7μ Al/70μCPP 12μPET/15μNylon/7μ Al/70μCPP 70μ unstretched polypropylene (block copolymer type) 70μ unstretched polypropylene (block copolymer type) 160mm (width) x 290mm (Height) x 40mm (Bottom fold diameter) 15mm (Width) x 180mm (Length) 40mm from the bottom, 20mm from the sides Attach a 10mmφ spout to the center of the bottom piece by heat sealing.

Evaluation (1) 1 fill with water, dropped twice from 1.2m height Number of pieces n = 10 4/10 broken bag (2) 0.5-1.5Kg/tub (good) (3) 45 minutes at 121℃ after 1 fill with water Experimental example with no retort abnormality 12μPET/15μNylon/7μ Al/70μL.LDPE 12μPET/15μNylon/7μ Al/70μL.LDPE 70μL.LDPE 70μL.LDPE 160mm (width) x 290mm (height) x 40mm (bottom diameter) 15mm ( Width) x 180mm (length) 40mm from the bottom, 20mm from the side 10mmφ spout (L.
Attach LDPE) with heat seal.

Evaluation (1) 1 filled with water, dropped 2 times from a height of 1.2 m Number of pieces n = 10 2/10 broken bag (2) 0.8 to 2.0 Kg/tab (slightly difficult to peel if the weight exceeds 0.5 Kg to 1.5 Kg) ( 3) After filling 1 water, there is an abnormality in the retort at 120°C for 30 minutes (heat resistance limit is 115°C. Normal retort (120°C)
℃)) (Note) When "20mm" was changed to "70mm", there was no bag breakage.

Experimental example 16μPET/15μNylon/9μ Al/70μCPP 12μPET/15μNylon/7μ Al/70μCPP 70μ unstretched polypropylene (block copolymer type) 70μ unstretched polypropylene (block copolymer type) 160mm (width) x 290mm (height) x 40mm (bottom) Folding diameter) 30mm (width) x 250mm (length) 25mm from the bottom, 70mm from the side Attach a 10mmφ spout (PP) to the center of the bottom piece by heat sealing.

Evaluation (1) 1 filled with water, dropped twice from a height of 1.2 m Number of pieces n = 10 2/10 broken bag (2) 0.7 to 1.7 Kg/tab (fairly good) (3) 45 at 121℃ after 1 filled with water Experimental example with no retort abnormality within minutes 12μPET/15μNylon/7μ Al/70μCPP 12μPET/15μNylon/7μ Al/70μCPP 70μ unstretched polypropylene (block copolymer type) 70μ unstretched polypropylene (block copolymer type) 160mm (width) x 290mm (height) ×40mm (Bottom fold diameter) 15mm (Width) × 180mm × (Both ends 7mmR) 25mm from the bottom, 70mm from the sides Attach a 10mmφ spout (PP) at the 30mm position on the bottom piece (from the longitudinal direction) by heat sealing.

Evaluation (1) 1 filled with water, dropped twice from a height of 1.2 m Number of pieces n = 10 3/10 No broken bags (both near spout) (2) 0.5 to 1.5 Kg/tab (good) (3) 1 filled with water After heating at 121℃ for 45 minutes, there was no retort abnormality (c) Effects of the Invention As is clear from the above explanation, the present invention is lightweight, easy to handle, inexpensive, has excellent light shielding properties and gas barrier properties, and has excellent light shielding and gas barrier properties. Since it has a high shelf life and does not require separate parts, it is possible to obtain an infusion container with a window that does not require any trouble associated with separate parts.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an infusion container with a window according to an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional end view of the window in FIG. 1, and FIG. 3 shows a spout and a hollow needle-shaped body. FIG. 1...Infusion container with window, 2...Front piece, 3...Back piece, 4...Bottom piece, 5...Side seal part, 6
... Bottom seal part, 7 ... Spout, 8 ... Hollow needle-like body, 11 ... Window, 12 ... Hole, 13 ... Band-shaped tab material, 14 ... First inner lining material, 15 ... No. 2
Adhesive material, 16... Adhesive area, 17... Adhesive area, 1
8... Void, 21... Sticking area, 22... Peeling direction.

Claims (1)

[Claims] 1. An infusion container made of a laminated material of plastic film and metal foil and having a content outlet at the bottom and a window for displaying the liquid level in the body, the window opening from the vicinity of the outlet. A hole formed in the base material facing upward and penetrating the front and back sides is closed by a first inner lining material, a second inner lining material, and a band-shaped tab material, and the first inner lining material is heat-sealed to the back surface of the base material at the periphery of the hole to close the hole, and the second inner lining material is made of a transparent or translucent material and is attached to the first inner lining at the periphery of the hole. The first inner adhesive material is heat-sealed to the back surface of the adhesive material and/or the base material to cover the inner surface of the portion facing the hole, and the strip tab material is made of a laminated material of plastic film and metal foil. 1. An infusion container with a window, characterized in that the first inner patch is heat-sealed and bonded to the surface of the first inner patch through the hole.