JPH1170931A - Paper container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a failure in shaping and prevent contents from leaking, a body from swelling due to intrusion of oxygen gas from an exterior, the contents from being oxidized, etc., by making two longitudinal rules approximately parallel to each other, which are positioned on a folding panel on the bottom of a paper container. SOLUTION: For example, the paper container is formed by having a laminate subjected to printing, creasing, cutting or the like to prepare a blank sheet as shown in the figure, and by applying frame seal machining or the like to make into a sleeve-like form, and then by shaping into the paper container by a filling and shaping machine. An intersection (r) of a slant rule 4 and a tip of a lateral rule 5 is positioned closer to a point (s) being a tip of the slant rule 4 than an intersection (q) of a tip of a longitudinal rule 7 and the other tip of the two slant rules 4. Thus the two longitudinal rules 7 positioned on a folding panel 10 on the bottom are approximately parallel to each other, thereby preventing the vicinity of a point (p) positioned at a tip of the folding panel 10 from being overlapped so as to prevent a failure in shaping from occurring and contents from leaking or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a paper container.

[0002]

2. Description of the Related Art In general, in a paper container for storing contents requiring long-term storage, a blank sheet having a form as shown in FIG. 1, for example, is used so that the contents do not contact the cross section of the paper. Then, after performing skive processing, frame sealing processing, and the like to form a sleeve, it is formed into a paper container by a filling molding machine. At this time, at the bottom portion, the two bottom portion folding panels 10 folded as shown by the halftone portions in FIG.
A gap X is generated between the two. When the paper container is molded by the filling molding machine, the gap is heated by heating the sealing portion with the bottom heater of the filling molding machine, thereby melting the thermoplastic resin laminated on the innermost layer. To make up for the gap.

Conventionally, when a paper container is formed, the gap X generated between the bottom folding panels 10 described above often has a trapezoidal shape as shown by a dot portion in FIG. For example, as shown in FIG. 5, the outer edge of the bottom folding panel 10 gradually protrudes toward the center in the width direction of the bottom folding panel, and has a mountain-shaped structure in which the center in the width direction is a vertex. No. 57-193621)
In the bottom portion of the gable-top type paper container having the above, the gap X tends to be trapezoidal when the paper container is formed. When the gap X has a trapezoidal shape, the vicinity of the point p located at the tip of the bottom part folded panel 10 overlaps (see the circle in FIG. 3), and a molding failure occurs, or as shown by the hatched portion in FIG. A gap G is generated, and the contents leak from the gap, or a gas such as oxygen enters from the outside,
There has been a problem that blistering and oxidation of the contents occur, and the contents cannot be stored for a long period of time.

In the case where the periphery of the point p located at the end of the bottom folding panel 10 does not overlap, the gap X
When the shape becomes trapezoidal, the gap becomes large. Therefore, in order to completely fill the gap X with the thermoplastic resin, the heating temperature of the heater is excessively increased to form the paper container. But,
When the heating temperature of the heater is high, the amount of low molecular volatile components generated by the oxidative decomposition of the thermoplastic resin increases, and the components migrate to the contents in the paper container, adversely affecting the taste and odor of the contents. There was a problem.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and does not cause molding failure when a paper container is molded, and has a problem of leakage of contents.
An object of the present invention is to develop and provide a paper container capable of preventing blistering due to invasion of a gas such as oxygen from the outside of a paper container and oxidation of the content, and enabling long-term storage of the content.

[0006]

Means for Solving the Problems As a result of intensive studies on the above objects, the present inventors have found that the gap X formed between the two bottom folding panels when the bottom is formed has a trapezoidal shape. That is, it was found that the object was achieved by making the two vertical ruled lines located in the bottom folding panel substantially parallel, and completed the present invention. That is, in the present invention, in a paper container formed by forming a laminate using base paper, the intersection between the oblique ruled line located at the bottom folded panel and the tip of the horizontal ruled line is the vertical ruled line located at the bottom folded panel. A paper container characterized by being provided at a position closer to the other end of the oblique ruled line than the intersection of the leading end and the ends of the two oblique ruled lines.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a paper container according to the present invention will be described in detail with reference to the drawings. The base paper in the present invention is obtained by papermaking a natural fiber, a synthetic fiber, or a mixture thereof. As natural fibers, wood fibers such as softwood pulp and hardwood pulp, vegetable fibers obtained by pulping cotton yarn, sugarcane, bamboo and the like, and animal fibers such as wool and silk yarn can be used. As synthetic fibers, fibrous materials such as polyethylene, polypropylene, polyamide, polyester, and cellulose acetate, carbon fibers, glass fibers, and the like can be used.

The laminate of the present invention is formed by laminating a thermoplastic resin or the like on one or both sides of the above-mentioned base paper, and if necessary, aluminum foil or polyester,
A barrier material such as a stretched or unstretched film such as a polyamide and an ethylene-vinyl alcohol copolymer, and a polyester film on which a vapor-deposited layer of an inorganic compound is formed may be included.

In the paper container of the present invention, the laminated body is subjected to printing, cleaving, cutting, and the like to form, for example, a blank sheet as shown in FIG. 9 and subjected to skiving, frame sealing, and the like to form a sleeve. Then, it is molded into a paper container by a filling molding machine. In addition, as a form of the paper container of the present invention formed using the laminate, a gable-top type, a flat-top type, and the like can be given. Here, the bottom folding panel 10 constitutes a folded portion of the bottom of the paper container as shown in FIG. For example, the blank sheet shown in FIG. 9 corresponds to a portion surrounded by the vertical ruled line 1 and the horizontal ruled line 2 in the blank sheet shown in FIG. The body panels 8 and 9 are flat portions forming the body of the paper container as shown in FIG. Further, the bottom panel 11 corresponds to, for example, a portion surrounded by the vertical ruled lines 1 and the horizontal ruled lines 3 in the blank sheet shown in FIG.

The width of the bottom folded panel 10 and the width of the body panel 8 adjacent to the bottom folded panel 10 are the same. The width of the bottom panel 11 and the width of the body panel 9 adjacent to the bottom panel 11 are the same. Here, the point p is the vertical ruled line 7 located on the bottom folding panel 10 and the bottom folding panel 10.
, The point q is the intersection of the tip of the vertical ruled line 7 located on the bottom part folding panel 10 and the tip of the two oblique ruled lines 4, and the point s is the oblique point located on the folding panel 10. This is the other end of the ruled line 4. The distance between an intersection q between the tip of the two oblique ruled lines 4 and the tip of the vertical ruled line 7 and an intersection r between the tip of the oblique ruled line 4 and the tip of the horizontal ruled line 5 is C, and the distance provided on the horizontal ruled line 2 is C. Let D be the distance between the point s, which is the other end of the ruled line, and the vertical ruled line 1 that divides each panel located closest to it.

In the paper container of the present invention, a blank sheet as shown in FIG. 1 is formed into a sleeve shape by frame sealing or the like, and is molded by a filling molding machine. Oblique ruled line 4 and horizontal ruled line 5
The intersection r with the tip of the vertical ruled line 7 and the two oblique ruled lines 4
Is provided at a position closer to the point s, which is the other end of the oblique ruled line 4 than the intersection q with the end of. When the bottom part of the paper container is formed by providing the intersection r at a position close to the point s, the two vertical ruled lines 7 located on the bottom part folding panel 10 become substantially parallel as shown in FIG. As a result, it is possible to prevent the vicinity of the point p located at the front end of the folding panel 10 from overlapping as shown by the hatched portion in FIG. 4, and to cause swelling due to poor molding, leakage of contents, and invasion of gas such as oxygen from the outside. And oxidation of the contents can be prevented.

Further, in the paper container of the present invention, the front end of the vertical ruled line 7 located on the bottom folding panel 10 and the front end of the vertical ruled line 7
The intersection q between the tip of the oblique ruled line 4 of the book and the intersection r of the tip of the oblique ruled line 4 and the end of the horizontal ruled line 5 located on the bottom folding panel 10.
And the thickness T of the laminate using the base paper are 0
It is desirable that <C ≦ 5T. If C exceeds 5T, the laminate may not be easily bent on the horizontal ruled line 5 when the paper container is molded by the filling molding machine, and molding failure may occur. Further, the horizontal ruled line 5 does not have to be arranged perpendicular to the vertical ruled line 1 as shown in FIG. 10, for example.

In the conventional paper container, as shown in FIG. 1, the leading end of the horizontal ruled line 5 is located at the intersection q between the leading end of the vertical ruled line 7 and the leading end of the two oblique ruled lines 4. 2, a trapezoidal gap X is formed between the two folded panels 10 folded as shown by the halftone dots in FIG. 2, that is, the two vertical ruled lines 7 located on the bottom folded panel 10 are not parallel. In many cases, as shown in the circle of FIG. 3, the vicinity of the point p located at the tip of the bottom folding panel 10 overlaps, and molding failure occurs, or a gap is formed between the overlapping panels as shown by the hatched portion in FIG. 4. G is generated, the contents leak from the voids, the body swells due to the invasion of gas such as oxygen from the outside, and the contents are oxidized, and the contents cannot be stored for a long time. Was. Further, when the point p located at the tip of the bottom folding panel 10 does not overlap, if the gap X has a trapezoidal shape, the gap becomes large. Therefore, the heating temperature of the heater is set so that the gap X is completely filled with the thermoplastic resin. Was excessively high to form a paper container. However, when the heating temperature of the heater is high, the amount of low-molecular volatile components generated by the oxidative decomposition of the thermoplastic resin increases, and the components migrate to the contents in the paper container, adversely affecting the taste and odor of the contents. There was a problem.

In the paper container of the present invention, the point s, which is one of the ends of the oblique ruled line 4 located on the bottom folding panel 10, is defined by a horizontal section dividing the bottom folding panel 10 and the body panel 8 adjacent thereto. It is desirable to provide on the ruled line 2. By providing a point s, which is one end of the oblique ruled line 4, on the horizontal ruled line 2, the laminate is easily bent on the oblique ruled line 4 when forming a paper container, and the isosceles triangle positioned on the bottom part folding panel 10 is formed. A vertex, ie, a point q, is projected, and the two vertical ruled lines 7 located on the bottom folding panel 10 can be made more parallel as shown in FIG.

Also, in the paper container of the present invention, the bottom folding panel 10 and the body panel 8 adjacent thereto are provided.
The distance D between the point s, which is one of the ends of the oblique ruled line 4 provided on the horizontal ruled line 2 that separates the vertical ruled line 1, and the vertical ruled line 1 positioned closest to the point s, the thickness T of the laminate using the base paper, Is D ≦ 2
Desirably T. When D exceeds 2T, the laminate becomes difficult to bend on the oblique ruled line 4 when the paper container is molded by the filling molding machine, and molding failure may occur.
In the conventional paper container, as shown in FIG. 1, a point s, which is one of the ends of the oblique ruled line 4, has a shape that intersects with the intersection of the vertical ruled line 1 and the horizontal ruled line 3. A trapezoidal gap X is generated between the two folded panels 10 folded as shown by the halftone dots in FIG. 2, and has the same problem as described above.

Further, in the paper container of the present invention, the width A of the bottom folded panel 10 and the body panel 8 adjacent thereto, and the width B of the bottom bottom panel 11 and the body panel 9 adjacent thereto are different. However, it is desirable that A> B, that is, A is larger than B. As shown in FIG. 7, in addition to making the two vertical ruled lines 7 located on the bottom part folding panel 10 parallel to each other, A> B makes it possible to form the bottom part when the paper container is formed by the filling molding machine. Therefore, even if the paper container is molded at a low temperature, the gap can be completely filled with the thermoplastic resin and the leakage of the contents can be prevented.

In the conventional paper container, A and B have the same dimensions (that is, A = B), and the widths E and F of the gap X generated at the bottom portion when the paper container is formed are large. In some cases, it was unavoidable that the contents leaked. Also, A is made smaller than B (that is, A <
B), the widths E and F of the gap X generated at the bottom portion when the paper container is molded by the filling molding machine are larger than those of the current paper container, and the leakage of the contents and the It is not preferable because a large amount of blisters and the like occur compared to the current product. Also,
In the paper container of the present invention, the bottom folded panel 1
0 and the width A of the body panel 8 adjacent thereto, the width B of the bottom bottom panel 11 and the body panel 9 adjacent thereto, and the thickness T of the laminate using the base paper,
More preferably, 0 <AB ≦ 2T. When AB exceeds 2T, when molding the paper container with the filling molding machine, the periphery of the point p located at the tip of the bottom folding panel 10 overlaps (see the circle in FIG. 3), and molding failure occurs. In some cases, a gap G may be generated between overlapping panels as shown by hatched portions in FIG.

In the paper container of the present invention, when the paper container is formed, the gap X generated between the two bottom folding panels 10 does not become trapezoidal, that is, two gaps located in the bottom folding panel 10 are formed. By making the vertical ruled lines 7 substantially parallel, the occurrence of molding defects, leakage of contents, swelling of the body due to invasion of gas such as oxygen from the outside, and oxidation of the contents are prevented. Products can be stored for a long time, and products of excellent quality can be obtained.

[0019]

EXAMPLES The present invention will be described below in more detail with reference to examples, but the present invention is not limited to these examples. The leakage of the contents and the overlap around the point p, which is the tip of the bottom folded panel 10, were visually confirmed. As the evaluation of the molding state, after measuring the widths E and F of the gap X at the bottom of the gable-top type paper container, the difference between the widths F and E of the gap X was calculated. As a measuring method, the seal portion was cut from one side with a burner, the periphery of the seal portion was cut open, and the width of the gap was measured with a vernier caliper. The overlap of the vicinity of the point p, which is the tip of the bottom part folded panel 10, was excluded from the measurement of the widths E and F of the gap X.

A standard value is provided for the evaluation of the width of the gap, and a case where the difference between the widths F and E of the gap X, that is, FE is 0.5 mm or less is determined to be good. In the examples and comparative examples, the following abbreviations may be used. Base paper a: Paper container base paper “Sake pack base paper” (trade name, manufactured by Tokyo Paper Co., Ltd., base paper basis weight 400 g / m ² , base paper thickness 47)
Base paper b: Paper container base paper “Sake pack base paper” (trade name, manufactured by Tokyo Paper Co., Ltd., base paper basis weight 350 g / m ² , base paper thickness 43)
Base paper c: Paper container base paper “Sake pack base paper” (trade name, manufactured by Tokyo Paper Mills, base paper basis weight 300 g / m ² , base paper thickness 36)
LDPE: Low-density polyethylene "Petrocene 204"
(Product name, manufactured by Tosoh Corporation)

Example 1 Two-part curable adhesives "LX-901" and "KW-7" were applied to an aluminum foil (manufactured by Nippon Foil Co., Ltd., thickness: 7 μm).
5 "(trade name, manufactured by Dainippon Ink and Chemicals, Inc., solid coating amount: 3.5 g / m ² ), and a polyester film" EF2002 "(trade name, manufactured by Nimura Chemical Co., Ltd.) which has been subjected to corona treatment on both sides. (Thickness: 12 μm) was dry-laminated. A two-part curable adhesive "L"
X-901 "and" KW-75 "(solids coating amount 3.
5 g / m ² ), and an unstretched polyethylene film “AJ-8” (trade name, manufactured by Tamapoli Co., Ltd., thickness 60)
μm) was dry-laminated to obtain a composite film. Further, the aluminum foil surface of this composite film is subjected to a corona treatment, and a base paper c is formed using an ethylene-methacrylic acid copolymer resin "Nucrel N-0908C" (trade name, manufactured by Du Pont-Mitsui Polychemicals Co., Ltd., thickness: 20 m). Was laminated on the back surface of the base paper, and LDPE (thickness: 20 μm) was extruded and laminated on the front side of the base paper to obtain a laminate having a thickness of 487 μm. The obtained laminate was subjected to cleaning and cutting with the LDPE (thickness: 20 μm) side as the surface to produce a blank sheet having a shape as shown in FIG. At this time, the width A of the bottom folded panel and the body panel adjacent thereto are 60.0 mm, and the width B of the bottom bottom panel and the body panel adjacent thereto are 60.0 mm.
(Difference between A and B, AB = 0.0 mm). The distance C between the intersection q between the tip of the vertical ruled line 7 located on the bottom folding panel and the tip of the two oblique ruled lines 4 and the intersection r of the oblique ruled line 4 and the horizontal ruled line 5 located on the bottom folding panel. =
0.55 mm.

The blank sheet is subjected to skive processing, frame sealing processing, and the like to form a sleeve, and then a paper container filling molding machine “150QL” (trade name, NIMCO C)
300 gable-top paper containers having the shape shown in FIG. 6 were formed while filling 500 ml of sake (alcohol content: 14.0 degrees or more and less than 15.0 degrees) using ORPORATION. The heating temperature of the bottom heater was 350 ° C. Table 1 shows the difference between the widths F and E of the gap X of the gable-top type paper container thus formed. Width F of gap X
The difference between E and E was smaller than the reference value, and the result was good. Table 2 shows the results of confirming leakage of the contents and overlapping around the point p which is the tip of the folding panel 10. In the obtained 300 gable-top paper containers,
There was no leakage of the contents and no overlap around the point p.

Example 2 An ethylene-vinyl alcohol copolymer resin film "EVAL XL" (trade name, manufactured by Kuraray Co., Ltd., 12 μm thick)
m), a two-part curable anchor coating agent “LX-6”
3F "and" KP-90 "(solids coating amount 1.0 g /
m ² ) and apply low density polyethylene “Mirason 16
P "(trade name, manufactured by Mitsui Petrochemical Industries, Ltd., thickness 20)
μm) using an unstretched polyethylene film “AJ-
8 ”(thickness: 40 μm) is sandwich-laminated, and the other surface is coated with a two-component curable anchor coating agent“ L ”.
X-63F "and" KP-90 "(solid content application amount 1.
0 g / m @ 2) and extruded and laminated with low density polyethylene "Mirason 16P" (thickness 15 .mu.m) to obtain a composite film. Further, the Mirason 16P (thickness: 15 μm) surface of this composite film was LDPE (thickness: 15 μm).
Using m), sandwich lamination was performed on the back surface of the base paper c, and LDPE (thickness: 20 μm) was extruded and laminated on the front side of the base paper to obtain a laminate having a laminate thickness of 490 μm.

The LDPE (thickness: 20 μm)
With the m) side as the surface, cleaning and cutting were performed to prepare a blank sheet having a shape as shown in FIG. A = 60.1 mm, B = 59.9 mm (A−B =
0.2 mm) and C = 0.3 mm. Further, the blank sheet is subjected to skive processing, frame sealing processing, and the like to form a sleeve.
While filling 500 ml of fruit juice beverage using “50QL”, 300 gable-top paper containers having the shape of FIG. 6 were molded. The heating temperature of the bottom heater was 330 ° C. Table 1 shows the difference between the widths F and E of the gap X of the gable-top type paper container thus formed. The difference between the widths F and E of the gap X was smaller than the reference value, and the result was good.
Table 2 shows the results of confirming leakage of the contents and overlapping around the point p which is the tip of the folding panel 10. None of the 300 obtained gable-top paper containers had any leakage of the contents and no overlap around the point p.

Example 3 A two-part curable adhesive "AD-590" and "CAT" were applied on the vapor deposition side of a silica single-sided vapor-deposited polyester film "Tech Barrier U" (trade name, manufactured by Mitsubishi Chemical Corporation, 12 μm thick). -55 "(trade name, manufactured by Toyo Morton Co., Ltd.
The solid content was 3.5 g / m ² ), and an unstretched polyethylene film “AJ-8” (thickness: 60 μm) was dry-laminated. On the polyester surface, two-part curable anchor coating agents “LX-63F” and “KP-9”
0 "(trade name, manufactured by Dainippon Ink and Chemicals, Inc., solid content applied amount: 1.0 g / m ² ), and low-density polyethylene“ Milason 16P ”(thickness: 15 μm) was extruded and laminated to form a composite film. Obtained. Further, the Mirason 16P (thickness: 15 μm) surface of this composite film was
(Thickness: 15 μm), sandwich lamination on the back side of the base paper a, and extruding and laminating LDPE (thickness: 20 μm) on the front side of the base paper.
A laminate having a thickness of 7 μm was obtained.

The LDPE (thickness: 20 μm)
With the m) side as the surface, cleaning and cutting were performed to prepare a blank sheet having a shape as shown in FIG. A = 85.7 mm, B = 85.2 mm (A−B =
0.5 mm), C = 1.7 mm, and D = 0.6 mm. Further, the blank sheet is subjected to skive processing, frame sealing processing, and the like to form a sleeve, and then sake (alcohol) is made using a paper container filling molding machine “RMH-418” (trade name, manufactured by Chubu Kikai Seisakusho Co., Ltd.). Min 14.0
While filling 1800 ml, 300 gable-top paper containers having the shape shown in FIG. 6 were formed. The heating temperature of the bottom heater was 320 ° C.
Table 1 shows the difference between the widths F and E of the gap X of the gable-top type paper container thus formed. The difference between the widths F and E of the gap X was smaller than the reference value, and the result was good. Table 2 shows the results of confirming leakage of the contents and overlapping around the point p which is the tip of the folding panel 10. None of the 300 obtained gable-top paper containers had any leakage of the contents and no overlap around the point p.

Example 4 An aluminum foil (thickness 7 μm) was LDP-coated on the back side of the base paper b.
Using E (thickness: 20 μm), sandwich lamination was performed, and LDPE (thickness: 20 μm) was extruded and laminated on the front side of the base paper. Furthermore, a low-density polyethylene “Mirason 16P” (thickness 20 μm)
m) using unstretched polyethylene film "AJ-8"
(Thickness: 40 μm) and sandwich laminated
A laminate having a thickness of 543 μm was obtained. With the LDPE (thickness 20 μm) side of the obtained laminate as the surface,
After performing the cleaning and the cutting, a blank sheet having a shape as shown in FIG. 10 was prepared. A = 70.2
mm, B = 69.9 mm (A−B = 0.3 mm), C =
0.5 mm. Further, the blank sheet is subjected to skive processing, frame sealing processing, etc. to form a sleeve, and then filled with 1000 ml of a coffee beverage using a paper container filling / molding machine “150QL” while the gable-top paper container having the shape of FIG. 300 moldings were performed. The heating temperature of the bottom heater was 320 ° C.

Table 1 shows the difference between the widths F and E of the gap X of the gable-top type paper container thus formed. Gap X
The difference between the widths F and E was smaller than the reference value, and the result was good. Table 2 shows the results of confirming leakage of the contents and overlapping around the point p which is the tip of the folding panel 10. None of the 300 obtained gable-top paper containers had any leakage of the contents and no overlap around the point p.

Example 5 Three types of five layers were co-extruded and laminated on the back side of base paper a in a configuration of h / i / j / k / l with the l side on the base paper side. However, h: LDPE (thickness 15 μm, extrusion temperature 27
I: "Admer NF550" (trade name, manufactured by Mitsui Petrochemical Industry Co., Ltd., thickness 7 μm, extrusion temperature 260 ° C.) j: ethylene-vinyl alcohol copolymer resin "Eval E" (trade name, Kuraray Co., Ltd.) K: “Admer NF550” (thickness: 7 μm, extrusion temperature: 260 ° C.) 1: LDPE (thickness: 25 μm, extrusion temperature: 275 ° C.) Has a corona treatment and T
Ozone treatment was applied to the 1-side of the three-layer, five-layer molten film extruded from the die. Further, the surface of the base paper was subjected to corona treatment, and extruded and laminated with LDPE (thickness: 20 μm, extrusion temperature: 305 ° C.) to obtain a laminate having a laminate thickness of 559 μm.

The LDPE (thickness: 20 μm)
With the m) side as the surface, cleaning and cutting were performed to produce a blank sheet having a shape as shown in FIG. A = 85.8 mm, B = 85.2 mm (AB
= 0.6 mm), C = 1.8 mm, D = 0.7 mm. Further, the blank sheet is subjected to skive processing, frame sealing processing, and the like to form a sleeve, and then, using a paper container filling and forming machine “RMH-418”, sake (alcohol content of 14.0 degrees or more and less than 15.0 degrees). ) 1800ml
Gable-top paper container 3 of the shape of FIG.
00 moldings were performed. The heating temperature of the bottom heater is 3
30 ° C. Table 1 shows the difference between the widths F and E of the gap X of the gable-top type paper container thus formed. The difference between the widths F and E of the gap X was smaller than the reference value, and the result was good. In addition, leakage of contents, folding panel 10
Table 2 shows the result of confirming the overlap around the point p, which is the tip of. None of the 300 obtained gable-top paper containers had any leakage of the contents and no overlap around the point p.

Example 6 Instead of the silica single-side vapor-deposited polyester film "Tech Barrier U" in Example 3, an alumina single-sided vapor-deposited polyester film "VM-PET 1011" (trade name,
The thickness of the laminated body was 597 μm in the same manner as in Example 3 except that Toyo Metallizing Co., Ltd., thickness 12 μm) was used.
m was obtained. The obtained laminate was subjected to cleaning and cutting with the LDPE (thickness: 20 μm) side as the surface to produce a blank sheet having a shape as shown in FIG. A = 85.7 mm, B = 85.2 mm
(AB = 0.5 mm), C = 1.7 mm, D = 0.6
mm. Further, the blank sheet is subjected to skive processing, frame sealing processing, and the like to form a sleeve, and then, using a paper container filling and forming machine “RMH-418”, sake (alcohol content of 14.0 degrees or more and less than 15.0 degrees). ) 18
While filling with 00 ml, 300 gable-top paper containers having the shape shown in FIG. 6 were formed. The heating temperature of the bottom heater was 320 ° C. Table 1 shows the difference between the widths F and E of the gap X of the gable-top type paper container thus formed. The difference between the widths F and E of the gap X is smaller than the reference value,
The results were good. Table 2 shows the results of confirming leakage of the contents and overlapping around the point p which is the tip of the folding panel 10. The obtained gable-top type paper container 3
Of the 00 pieces, none of them had leakage of the contents and overlap around the point p.

Example 7 A laminate having a thickness of 475 μm was obtained in the same manner as in Example 4 except that base paper c was used in place of base paper b. LDPE (thickness 20) of the obtained laminate
With the μm) side as the surface, cleaning and cutting were performed to produce a blank sheet having a shape as shown in FIG. A = 70.0 mm, B = 70.0 mm (A−
B = 0.0 mm) and C = 0.5 mm. further,
This blank sheet is subjected to skive processing, frame sealing processing, etc. to form a sleeve, and then a paper container filling and forming machine “UP-SL50” (trade name, manufactured by Shikoku Processing Machine Co., Ltd.)
While filling with 500 ml of fruit juice beverage, 300 gable-top paper containers having the shape shown in FIG. 6 were molded. The heating temperature of the bottom heater was 320 ° C. Table 1 shows the difference between the widths F and E of the gap X of the gable-top type paper container thus formed. The difference between the widths F and E of the gap X was smaller than the reference value, and the result was good. Table 2 shows the results of confirming leakage of the contents and overlapping around the point p which is the tip of the folding panel 10. In the obtained 300 gable-top paper containers, the leakage of the contents and the point p
There were no peripheral overlaps.

Example 8 A laminate having a thickness of 452 μm was obtained in the same manner as in Example 5 except that base paper c was used in place of base paper a. LDPE (thickness 20) of the obtained laminate
With the μm) side as the surface, cleaning and cutting were performed to produce a blank sheet having a shape as shown in FIG. A = 70.3 mm, B = 69.9 mm (A−
B = 0.4 mm) and C = 0.5 mm. further,
The blank sheet is subjected to skive processing, frame sealing processing, etc. to form a sleeve, and then filled with 500 ml of fruit juice beverage using a paper container filling and forming machine “UP-SL50”, while the gable-top paper container having the shape of FIG. 300 moldings were performed. The heating temperature of the bottom heater is 330 ° C
Met. Table 1 shows the difference between the widths F and E of the gap X of the gable-top type paper container thus formed. The difference between the widths F and E of the gap X was smaller than the reference value, and the result was good. Table 2 shows the results of confirming leakage of the contents and overlapping around the point p which is the tip of the folding panel 10. In the obtained 300 gable-top paper containers,
There was no leakage of the contents and no overlap around the point p.

Example 9 A laminate having a thickness of 558 μm was obtained in the same manner as in Example 3 except that base paper b was used in place of base paper a. LDPE (thickness 20) of the obtained laminate
With the [mu] m) side as the surface, cleaning and cutting were performed to prepare a blank sheet having a shape as shown in FIG. A = 70.0 mm, B = 70.0 mm (A−
B = 0.0 mm), C = 0.5 mm, and D = 0.5 mm. In addition, skive processing on this blank sheet,
After performing frame sealing and the like to form a sleeve shape, 300 gable-top paper containers having the shape shown in FIG. 6 were formed while filling 1000 ml of coffee beverage using a paper container filling and forming machine “UP-SL50”. . The heating temperature of the bottom heater was 320 ° C. Table 1 shows the difference between the widths F and E of the gap X of the gable-top type paper container thus formed. The difference between the widths F and E of the gap X was smaller than the reference value, and the result was good. Table 2 shows the results of confirming leakage of the contents and overlapping around the point p which is the tip of the folding panel 10. None of the 300 obtained gable-top paper containers had any leakage of the contents and no overlap around the point p.

Example 10 A laminate having a thickness of 558 μm was obtained in the same manner as in Example 6 except that base paper b was used in place of base paper a. LDPE (thickness 20) of the obtained laminate
With the [mu] m) side as the surface, cleaning and cutting were performed to prepare a blank sheet having a shape as shown in FIG. A = 70.3 mm, B = 69.9 mm (A−
B = 0.4 mm), C = 0.5 mm, and D = 0.4 mm. In addition, skive processing on this blank sheet,
After performing frame sealing and the like to form a sleeve shape, 300 gable-top paper containers having the shape shown in FIG. 6 were formed while filling 1000 ml of coffee beverage using a paper container filling and forming machine “UP-SL50”. . The heating temperature of the bottom heater was 320 ° C. Table 1 shows the difference between the widths F and E of the gap X of the gable-top type paper container thus formed. The difference between the widths F and E of the gap X was smaller than the reference value, and the result was good. Table 2 shows the results of confirming leakage of the contents and overlapping around the point p which is the tip of the folding panel 10. None of the 300 obtained gable-top paper containers had any leakage of the contents and no overlap around the point p.

COMPARATIVE EXAMPLE 1 A laminate was obtained in the same manner as in Example 1, and then subjected to cleaning and cutting with the LDPE (thickness: 20 μm) side as the surface to produce a blank sheet having the shape shown in FIG. A = 60.0 mm, B = 60.0 mm (A
-B = 0.0 mm). Further, the blank sheet is subjected to skive processing, frame sealing processing, and the like to form a sleeve, and then a paper container filling molding machine “150QL”.
While filling 500 ml of sake (alcohol content of 14.0 degrees or more and less than 15.0 degrees), 300 gable-top paper containers having the shape of FIG. 6 were formed. The heating temperature of the bottom heater was 350 ° C. Table 1 shows the difference between the widths F and E of the gap X of the gable-top type paper container thus formed. The difference between the widths F and E of the gap X was larger than the reference value and Examples 1 and 2. Table 2 shows the results of confirming leakage of the contents and overlapping around the point p which is the tip of the folding panel 10. In the obtained 300 gable-top paper containers, the leakage of the contents was found in two bottles,
Overlap around the point p occurred in two of them.

Comparative Example 2 After obtaining a laminate in the same manner as in Example 4, the blank was cut and cut with the LDPE (thickness: 20 μm) side as the surface to produce a blank sheet having the shape shown in FIG. A = 70.0 mm, B = 70.0 mm (A
-B = 0.0 mm). Further, the blank sheet is subjected to skive processing, frame sealing processing, and the like to form a sleeve, and then a paper container filling molding machine “150QL”.
While filling 1000 ml of coffee beverage using
The shape of 300 gable-top paper containers having the shape shown in FIG. The heating temperature of the bottom heater was 320 ° C. Table 1 shows the measurement results of the widths E and F of the gap X and the difference between the widths F and E of the gap X of the gable-top type paper container thus formed. The difference between the widths F and E of the gap X was larger than the reference value and Example 4. In addition, leakage of contents,
Table 2 shows the result of checking the overlap around the point p which is the tip of the folding panel 10. Out of 300 obtained gable-top type paper containers, 11 leaked at the bottom part. Table 2 shows the results of confirming leakage of the contents and overlapping around the point p which is the tip of the folding panel 10. Out of the 300 obtained gable-top paper containers, 11 leaked the contents, and 10 leaked the point p.
A peripheral overlap occurred.

Comparative Example 3 A laminate was obtained in the same manner as in Example 3, and then subjected to cleaning and cutting with the LDPE (thickness: 20 μm) side as the surface to produce a blank sheet having the shape shown in FIG. A = 85.5 mm, B = 85.5 mm (A
-B = 0.0 mm). Further, the blank sheet is subjected to skive processing, frame seal processing, and the like to form a sleeve, and then a paper container filling and forming machine “RMH-41”.
Sake (alcohol content of 14.0 degrees or more and 15.
While filling 1800 ml (less than 0 degree), 300 gable-top paper containers having the shape shown in FIG. 6 were molded. The heating temperature of the bottom heater was 320 ° C. The width E of the gap X of the gable-top type paper container thus formed,
Table 1 shows the measurement results of F and the difference between the widths F and E of the gap X. The difference between the widths F and E of the gap X is the reference value and Example 3,
It was larger than 5. Table 2 shows the results of confirming leakage of the contents and overlapping around the point p which is the tip of the folding panel 10. In 300 of the obtained gable-top paper containers, the leakage of the content was 9 points and the point p was 7 points.
A peripheral overlap occurred.

Comparative Example 4 A laminate was obtained in the same manner as in Example 6, and then subjected to cleaning and cutting with the LDPE (thickness: 20 μm) side as the surface to produce a blank sheet having the shape shown in FIG. A = 85.5 mm, B = 85.5 mm (A
-B = 0.0 mm). Further, the blank sheet is subjected to skive processing, frame seal processing, and the like to form a sleeve, and then a paper container filling and forming machine “RMH-41”.
Sake (alcohol content of 14.0 degrees or more and 15.
While filling 1800 ml (less than 0 degree), 300 gable-top paper containers having the shape shown in FIG. 6 were molded. The heating temperature of the bottom heater was 320 ° C. The width E of the gap X of the gable-top type paper container thus formed,
Table 1 shows the measurement results of F and the difference between the widths F and E of the gap X. The difference between the widths F and E of the gap X was larger than the reference value and Example 6. Table 2 shows the results of confirming leakage of the contents and overlapping around the point p which is the tip of the folding panel 10. The obtained gable-top type paper container 3
Of the 00 bottles, eight leaked contents, and five bottles overlapped around point p.

COMPARATIVE EXAMPLE 5 After obtaining a laminate in the same manner as in Example 8, PE (thickness: 20)
With the μm) side as the surface, cleaning and cutting were performed to produce a blank sheet having a shape as shown in FIG. A = 70.0 mm, B = 70.0 mm (A−
B = 0.0 mm). Further, the blank sheet is subjected to skive processing and frame sealing processing to form a sleeve, and then a paper container filling and forming machine “UP-SL50”.
While filling with 500 ml of fruit juice beverage, 300 gable-top paper containers having the shape shown in FIG. 6 were molded. The heating temperature of the bottom heater was 330 ° C. Table 1 shows the measurement results of the widths E and F of the gap X and the difference between the widths F and E of the gap X of the gable-top type paper container thus formed.
Shown in The difference between the widths F and E of the gap X was larger than the reference value and Examples 7 and 8. Table 2 shows the results of confirming leakage of the contents and overlapping around the point p which is the tip of the folding panel 10. Among 300 obtained gable-top type paper containers, leakage of the contents occurred in 8 bottles, and overlap around point p occurred in 7 bottles.

Comparative Example 6 A laminate was obtained in the same manner as in Example 9, and then subjected to cleaning and cutting with the LDPE (thickness: 20 μm) side as the surface to produce a blank sheet having a shape as shown in FIG. A = 70.0 mm, B = 70.0 mm
(AB = 0.0 mm). Further, the blank sheet is subjected to skive processing, frame sealing processing, and the like to form a sleeve, and then a paper container filling and forming machine “UP-
Using SL50 ", 300 gable-top paper containers having the shape shown in FIG. 6 were formed while filling 1000 ml of coffee beverage. The heating temperature of the bottom heater was 320 ° C. Table 1 shows the measurement results of the widths E and F of the gap X and the difference between the widths F and E of the gap X of the gable-top type paper container thus formed. The difference between the widths F and E of the gap X was larger than the reference value and Examples 9 and 10. Table 2 shows the results of confirming leakage of the contents and overlapping around the point p which is the tip of the folding panel 10. Out of 300 obtained gable-top paper containers, leakage of the contents occurred in 10 bottles, and overlap around point p occurred in 8 bottles.

[0042]

[Table 1]

The widths F and E of the gap X in Examples 1 to 10
Is smaller than the reference value and the difference between the widths F and E of the gaps X in Comparative Examples 1 to 6, and the result was good.

[0044]

[Table 2]

In the comparative examples 1 to 6, the leakage of the contents and the overlap around the point p which is the front end of the folded panel 10 occurred. In the first to tenth embodiments, the leakage of the contents and the point which was the front end of the folded panel 10 occurred. There was no overlap around p, which was a good result.

[0046]

According to the present invention, by making the two vertical ruled lines positioned on the bottom folding panel of the paper container substantially parallel, the occurrence of molding defects, leakage of contents, and the generation of gas such as oxygen from the outside are prevented. It is possible to prevent the occurrence of blistering due to intrusion and the oxidation of the contents, thereby providing a paper container capable of storing the contents for a long time.

[Brief description of the drawings]

FIG. 1 is a schematic view of an example of a blank sheet forming a conventional gable-top type paper container.

FIG. 2 is an enlarged view of an example of a bottom portion of a conventional gable-top type paper container.

FIG. 3 is an enlarged view of an example of a bottom portion of a conventional gable-top type paper container.

FIG. 4 shows the bottom of a conventional gable-top type paper container as H
Cross section viewed from the direction

FIG. 5 is a schematic view of an example of a blank sheet forming a conventional gable-top type paper container.

FIG. 6 is a schematic diagram of a gable-top type paper container.

FIG. 7 is an enlarged view of an example of the bottom portion of the gable-top type paper container of the present invention.

FIG. 8 is a schematic view of an example of a blank sheet forming the gable-top type paper container of the present invention.

FIG. 9 is a schematic view of an example of a blank sheet forming the gable-top type paper container of the present invention.

FIG. 10 is a schematic view of an example of a blank sheet forming the gable-top paper container of the present invention.

FIG. 11 is a schematic view of an example of a blank sheet forming the gable-top type paper container of the present invention.

FIG. 12 is a schematic view of an example of a blank sheet forming the gable-top type paper container of the present invention.

FIG. 13 is a schematic view of an example of a blank sheet forming the gable-top type paper container of the present invention.

FIG. 14 is a schematic view of an example of a blank sheet forming the gable-top type paper container of the present invention.

FIG. 15 is a schematic view of an example of a blank sheet forming a conventional gable-top type paper container.

[Explanation of symbols]

1 ・ ・ ・ Vertical ruled line dividing each panel 2 ・ ・ ・ Horizontal ruled line dividing bottom folded panel and body panel adjacent to it 3 ・ ・ ・ Horizontal line dividing bottom bottom panel and body panel adjacent to it Ruled line 4 ... Slanted ruled line located on bottom folded panel 5 ... Horizontal ruled line located on bottom folded panel 6 ... Horizontal ruled line located on bottom bottom panel 7 ... Located on bottom folded panel Vertical ruled line 8 ... Body panel adjacent to bottom part folding panel 9 ... Body panel adjacent to bottom part bottom panel 10 ... Bottom part folding panel 11 ... Bottom part bottom panel

Claims (6)

[Claims] 1. In a paper container formed by forming a laminate using base paper, the intersection between the oblique ruled line located on the bottom folded panel and the tip of the horizontal ruled line is the tip of the vertical ruled line located on the bottom folded panel. A paper container provided at a position closer to the other end point of the oblique ruled line than the intersection of the two oblique ruled lines with the ends of the two oblique ruled lines. 2. The distance C between the intersection of the tip of the vertical ruled line located on the bottom folding panel and the tip of two slanted rules, and the intersection of the tip of the slant ruled and horizontal ruled lines located on the bottom folding panel. 2. The paper container according to claim 1, wherein the thickness T of the laminate using the base paper is 0 <C ≦ 5T. 3. The oblique ruled line located at the bottom folded panel, one of the ends of which is provided on a horizontal ruled line separating the bottom folded panel and the body panel adjacent thereto. 3. The paper container according to 2. 4. A distance D between a tip of a slanted ruled line provided on a horizontal ruled line for dividing a bottom folded panel and a body panel adjacent thereto and a vertical ruled line for dividing each panel located closest thereto. And the thickness T of the laminate using the base paper
The paper container according to claim 1, wherein D ≦ 2T. 5. The width A of the bottom folded panel and the body panel adjacent thereto, and the width B of the bottom bottom panel and the body panel adjacent thereto are A> B. The paper container according to claim 1. 6. The width A of the bottom folded panel and the body panel adjacent thereto, the width B of the bottom bottom panel and the body panel adjacent thereto, and the thickness T of the laminate using the base paper. The paper container according to claim 1, wherein 0 <AB ≦ 2T.