JPH068219U - Liquid paper container - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent pinholes and cracks that occur on the fold line at the top of a liquid paper container with a flat top, which is used for fruit drinks, milk, sake, etc. [Structure] In a rectangular liquid paper container having a flat top portion, a horizontal fold line at the lower end of the upper end seal portion on the side where the upper end seal portion is folded when forming a blank plate container is continuous to the upper seal portion and the container top portion. A blank plate provided partially lacking in the vicinity of the intersection with the two vertical fold lines is folded into a container.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a liquid paper container with a flat top, which is used for foods such as fruit juices, milk and sake, and non-food products such as shampoos and conditioners.

[0002]

[Prior art]

 In recent years, liquid paper containers have been required to replace conventional glass containers and metal containers with chilled distribution type liquid foods such as milk, lactic acid bacteria drinks, liquid soups, and long-term storage such as sake, fruit juice drinks, and noodle soups. It has come to be used in large quantities in a wide range of applications such as room temperature liquid foods. Recently, it has also been used in non-food fields such as toiletries. Among these liquid paper containers, an example of a conventional representative blank plate used for box-making of a liquid paper container having a flat top according to the present invention is shown in the development plan view of FIG. In the horizontal direction, five rectangular seal panels (211), a left side panel (212), a front side panel (213), a right side panel (214) and a back side panel (215) are connected to each other by four vertical fold lines. Lines (231, 232, 233, 234) are serially arranged in parallel, and the five panels are vertically connected by three horizontal crease lines (241, 242, 243). The upper end seal portion (221), the top portion (222), the side wall portion (223), and the bottom portion (224) are arranged in parallel in order from the top, and horizontal fold lines (244 ) And two vertical folds The lower end seal portion (225) is provided through (263, 264) and the isosceles triangle whose base is the ridgeline connecting the left and right corners at the lower ends of the tops for folding is provided at the top of the left and right side panels. The shape is provided with two diagonal fold lines (251 and 252, 253 and 254) that intersect the lower ends of the vertical fold lines (261 and 262) of the upper end seal portion, and further, at the bottom of the left and right side wall panels. Is an isosceles triangle whose base is the ridgeline connecting the left and right corners at the upper end of the bottom, and two diagonal fold lines (255 and 256) that intersect with the upper end of the fold line (263, 264) perpendicular to the lower end seal part. , 257 and 258) were provided.

[0003]

[Problems to be solved by the device]

 However, the laminated material used for the blank board of the liquid paper container has a polyethylene / paperboard / polyethylene structure even in the relatively simple chilled distribution type, and in the normal temperature distribution type, polyethylene / paperboard / aluminum foil / polyethylene terephthalate. / Polyethylene structure and multi-layered laminated material are used. On the filling machine line, when the left and right triangular ears of the top of the container in the box making process are bent downward and attached to the side wall of the side panel, At the fold line of the top part, two intersections of the horizontal fold line of the lower end of the upper end seal part inside which the upper end seal part is folded, and the vertical fold line continuous with the upper end seal part and the top of the container ( Pinholes and cracks (including cracks in some of the constituent layers of the laminated material) sometimes occurred at the portion (point P in FIGS. 1 and 3).

[0004]

[Means for Solving the Problems]

 As shown in FIG. 1 and FIG. 3, the present invention is a rectangular liquid paper container having a flat top portion, and a top end seal portion (121) on the side where the top end seal portion (121) is folded when the blank plate (100) is formed. The horizontal fold line (141) at the lower end of the part is partially missing near the intersection of the two vertical fold lines (132, 133) continuous with the upper seal part and the container top part (122) ( A liquid paper container (300) characterized by being folded into a container using a blank plate provided as a and b and c and d).

The above-mentioned horizontal crease line is provided partially lacking in the vicinity of the intersection with the vertical crease line means that the horizontal crease line having a necessary width is provided on both sides of the vertical crease line at the intersection. The part is provided.

[0006]

[Action]

 When a box is manufactured using the blank plate relating to the liquid paper container of the present invention, the horizontal crease line at the lower end of the upper end seal part on the folding side of the upper end seal part has two continuous lines between the upper seal part and the container top part. Since it is provided in the vicinity of the intersection with the vertical crease line by partially lacking it, when folding to close and seal the top, fold the upper end seal part (121) as shown in FIG. Furthermore, even if the triangular ears (171 and 172) protruding at both ends of the top are bent downward and attached to the side wall (123), there is a gap in the overlap of the bent parts of the laminated material. Therefore, unnecessary force is not applied, and pinholes and cracks that tend to occur at the bent portions of the constituent material layers of the laminated material can be prevented.

[0007]

【Example】

 First, a blank plate for making a box of the liquid paper container of this example was produced. FIG. 1 is a developed plan view of the blank plate, which shows five rectangular seal panels (111), a left side panel (112), a front panel (113), a right side panel (114), and a back side in a horizontal direction. Panels (115) are serially connected in parallel through four vertical crease lines (131, 132, 133, 134), and further, these five panels have three horizontal crease lines (in vertical direction). The upper end seal part (121), the top part (122), the side wall part (123), and the bottom part (124) are serially connected in parallel from the top via 141, 142, 143). Regarding the line (141), a total of 6 mm in width (a and b, c and d) was provided by 3 mm on each side of the intersection with the two vertical fold lines (132, 133). Then, a bottom end seal portion (125) is provided on the left and right side panels and the bottom portion of the front panel via a horizontal fold line (144) and two vertical fold lines (163, 164). Vertical crease lines (161, 162) are provided in the center of the upper end seals of the side panels, and the left and right corners at the lower ends of the tops are connected to the tops of the left and right side panels for folding. Two oblique fold lines (151 and 152, 153 and 154) intersecting the lower ends of the vertical fold lines (161, 162) of the upper end seal portion are provided in an isosceles triangle shape with the ridge line as the bottom, and further, At the bottom of the left and right side panels, diagonally intersecting with the upper ends of the vertical fold lines (163, 164) of the bottom seal part in an isosceles triangle whose base is the ridgeline connecting the left and right corners at the top of the bottom. Book folds (155 and 156,1 57 and 158) in which the provided.

The composition of the laminated material of the blank plate used in this example is as follows: [Outside] polyethylene (20 μm) / paper (340 g / m ² ) / aluminum foil (7 μm) / polyethylene terephthalate (12 μm) / polyethylene ( 60 μm) [inside], and characters and patterns are printed on the surface by the gravure printing method.

Next, the blank side-sealed with a frame sealer is poured into a filling machine, the bottom is heat-sealed, water is filled for the test, and then the top is heat-sealed and sealed. A liquid paper container (300) of the present invention having a room temperature distribution type having a flat top as shown in FIG. 3B was prepared.

In the box-making process of the present embodiment described above, after heat-sealing the top end seal part of the top part, the top end seal part is bent as shown in FIGS. Even if the triangular ears (171 and 172) protruding at both ends were bent downward and attached to the side wall, pinholes or cracks did not occur on the crease line of the overlapping portion of the laminated material. In particular, no pinholes or cracks were found in the P portion, which was easily generated in the past.

[0011]

[Effect of device]

 The liquid paper container of the present invention manufactured by using the blank plate according to the present invention has the left and right triangular ears on the top of the container in the box making process on the filling machine line as described in the section of the embodiment. When folded down and pasted on the side wall of the side panel, no pinholes or cracks were observed on the vertical crease line on the top of the blank plate container. It was confirmed that there were few pinholes and cracks on the top crease line.

[Brief description of drawings]

FIG. 1 is a developed plan view of a blank plate of a liquid paper container of the present invention.

FIG. 2 is a developed plan view of a blank plate of a conventional liquid paper container.

FIG. 3 is an explanatory diagram showing a closed and sealed state of the top portion of the liquid paper container during box making.

[Explanation of symbols]

100, 200 ...... Blank plate 111,211 ...... Seal panel 112,212 ...... Left side panel 113,213 ...... Front panel 114,214 ...... Right side panel 115,215 …… Back panel 121,221 …… Upper end Seal part 122, 222 ... Top part 123, 223 ... Side wall part 124, 224 ... Bottom part 125, 225 ... Bottom end seal part 131, 132, 133, 134, 141, 142, 1
43, 151, 152, 153, 154, 155, 15
6,157,158,161,162,163,16
4,231,232,233,234,241,24
2,243,251,252,253,254,25
5,256,257,258,261,262,26
3,164 ... Fold lines 171,172 ... Triangular ears 300 ... Liquid paper container

Claims (1)

[Scope of utility model registration request] 1. In a rectangular liquid paper container having a flat top, a horizontal fold line at the lower end of the upper end seal part on the side where the upper end seal part is folded when forming a container of a blank plate is defined as an upper seal part and a container top part. A liquid paper container characterized in that it is folded into a container using a blank plate provided in the vicinity of the intersection of two vertical crease lines continuous with each other partially lacking.