JPS62279943A - Laminated cardboard vessel and blank for manufacturing said vessel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates generally to cardboard containers, and more particularly to laminated wall structures for said cardboard containers comprising an oxygen-resistant barrier or layer. Regarding.

[Background of the invention]

In various industries, central packaging for long distance markets has been found to be a beneficial strategy for the business operations of those industries, whereby a strong market base can be developed and facilitated for said business operations. Served. As mass production and sales become more important, many population centers as market bases will extend beyond national borders. Accordingly, both necessity and expediency have led to the development of a space where the original product market development area extends over a vast market. Therefore, in order to ensure that producers and suppliers can uniformly provide the highest quality products throughout the distribution range, there is a need for a longer shelf life, especially for liquids such as fruit juice and products that are difficult to store in containers. has been done.

It is well known that the incorporation of layers of aluminum foil generally acts as a means of preventing oxygen from penetrating the walls of cardboard containers, particularly when the cardboard container contains fruit juice. However, aluminum as a barrier is expensive and moreover, cracks are likely to occur along the fold lines. It is also well known to coat barrier layers with heat sealable materials such as low concentration polyethylene, but such coatings tend to strip flavor essence and aroma from various fruit juices.

OBJECTS OF THE INVENTION In view of the properties of aluminum and low concentration polyethylene mentioned above, it is a general object of the present invention to provide an improved economical cardboard container that can improve the shelf life of fruit juice. .

Another object of the invention is to provide a container with an improved wall structure consisting of suitable barriers or walls that are compatible with each other as far as adhesion and sealing are concerned, avoiding the negative characteristics mentioned above. be.

Yet another object of the present invention is to provide suitable compositions, the wall structure of which is often made of polyester and polyvinylidene chloride, in order to maintain flavor and aroma while effectively preventing oxygen passage.
An object of the present invention is to provide a cardboard container comprising a laminate.

Yet another object of the present invention is to provide a container in which the polyester is amorphous polyethylene terephthalate.

[Description of Examples] To explain in detail with reference to the drawings, Fig. 1 shows a container material 1.
The inner surface of the o is illustrated. The container blank 10 is generally divided into three groups by alternating fold lines 12 and 14. The group above the fold line 12 is referred to as the top group 16. The group between fold lines 12 and 14 is referred to as body group 18. The group below the fold line 14 is referred to as the bottom cover group 20.

The container blank 10 is laterally defined by lateral edges 22 and 24 which define a series of fold lines 26, 2830 and 3.
vertically divided by 2. Fold line 26.28.3
o and 32 connect the torso group 18 to the side wall panels 34, 36.
38 and 40 and a side seam flap 42.

The upper lid group 16 is provided at the upper end of the barrel group 18. Triangular end panels 44 and 46 are provided at the upper ends of side wall panels 34 and 38, respectively, by fold line 12. The triangular end panel 44 has a pair of adjacent flap panels 48 and 50 on its upper sides;
The triangular end panel 46 then has a pair of adjacent folded panels 52 and 54 located on its upper sides. A pair of inner rib panels 56 and 58 are provided adjacent fold panels 48 and 50, respectively. A pair of inner rib panels 60 and 62 are provided adjacent fold panels 52 and 54, respectively.

A pair of roof panels 64 and 66 are provided on the trunk group 18 at the upper ends of the side wall panels 36 and 36, respectively. An upper edge member 72 defines the upper free end of the upper lid group 16. A complete explanation of the top group 16 is not necessary for understanding the gist of the invention. However, reference is made to U.S. Pat. No. 3,270,940 for a complete description of a top group similar to top group 16.

The bottom cover group 20 is provided at the lower end of the body group 18. A flap 74 and a top flap 76 are provided at the lower end of each of the sidewall panels 34,38 along staggered fold lines I4.

A first minor flap 78 and a second minor flap 80 are provided at the bottom of each of the sidewall panels 34 , 38 along alternating fold lines 14 . A pair of fold back panels 82 and 84 connect the first minor flap 78 to the side seam flap 4.
2 and flap 74, respectively. A second minor flap 80 is coupled to flap 74 and top flap 76 by folded panels 86 and 88, respectively.

Bottom edge 90 defines the free end of bottom lid group 20.

For purposes to be explained hereinafter, a bayonet flap 92 is provided in the center of the flap 74 of the edge 90 by a fold line 94.

When the container blank 10 is prepared for assembly as a container, the triangular end panel 44 and the first small flap 7
8 and their associated flap panels 82 and 84
along the fold line 28 with the side seam flaps 42 and fold their inner surfaces together with the roof panel 64, the side wall panels 36 and It is brought into contact with the inner surface of the flap 74 and seamed laterally.

Roof panel 66, side wall panel 40 and top flap 76
are rotated along fold line 32 so that their inner surfaces include triangular end panel 46, side wall panel 38 and second minor flap 80 and associated flap panels 86 and 88.
0 then the lateral edges 2
4 is substantially aligned with the fold line 30 so that its associated edge is aligned with and in contact with the outer surface of the side seam flap 42. The outer surfaces of the side seam flaps 42 are secured to the inner surfaces of the various panels, and the flap members are positioned along the side edges 24. This can be achieved in many ways. One preferred method is between the members mentioned above.

The container blank 10 is then opened into a tube shape by heat sealing to establish a like-to-surface bond.

In normal production operation, the bottom cap group 20 is closed and sealed, the contents are filled into the tubular container, and the top cap group 16 is closed as illustrated in FIG.

Details of the formation of the side-jointed blanks and closure of the top group are described in the above-mentioned US patent. Details of assembling the bottom cover group 20 can be found in U.S. Pat.
．． No. 341,340.

The insertion flap 92 folded along the crease line 94 is
As illustrated and described in U.S. Pat. No. 3,294,310, it serves to eliminate raw edges from the center of the four folded and spliced bottom lid panels.

Referring to FIG. 4, a cross-sectional view of the container wall is shown. The inner surface of container 96 is identified by arrow - and the outer surface of container 96 is identified by arrow 0. Each layer is sequentially identified from outside to inside as follows: 0 layer 98 and 10
0 are comprised of a suitable polyester, such as amorphous polyethylene terephthalate, and are disposed on each side of the center 1ii102.

The central layer 102 constitutes the plateau or main body layer and may be comprised of kraft paper, foam plastic synthetic cardboard, or composite paper. Amorphous polyethylene terephthalate was selected for its excellent heat sealing properties. The innermost layer 104 is polyvinylidene chloride.

The latter is applied to layer 10o by conventional printing techniques. It is therefore possible to apply polyvinylidene chloride coatings in precise patterns that avoid areas of the material involved in the heat sealing operation. The preferred pattern is stippled in FIG. The finished container is economical due to the superior durability and heat sealing properties of amorphous polyethylene terephthalate, and the aroma retention and barrier properties of polyvinylidene, combined with the need for additional adhesives or adhesives for lamination. Completely utilized without the use of additional coatings for heat sealing.

Figure 4 is not drawn to scale. The range of thickness of each layer that can be used in practical embodiments of containers according to the invention is illustrated below.

Layer 98: 0.0005 inch to 0.0010 inch (preferably 0.0075 inch) Layer 100: 0.001 inch to 0.003 inch (
Preferably 0.0020 inch) IJ 102 + 0.0123 inch to 0.0254
inches (depending on container size). For auto, half-gallon, and gallon applications6 For example, for typical half-gallon dimensions, the preferred thickness is 0.022 inches, with a recommended range of 0.02 inches.
It is 0 inches to 0024 inches.

In including said special layer, the inner cutting edge 22
4,254.693, and thereby overlaying it by several methods such as those shown and described in U.S. Pat. No. 4,254.693, thereby creating It would be advantageous to have a container edge structure that is Combining one of these techniques with the bayonet flap 92 eliminates raw edges from the liquid container.

It should be appreciated that the present invention provides an improved cardboard container for conveying fruit juice.

It is also provided that the thickness of each layer of said material may be varied independently of other layers to suit a particular liquid packaging application.
I want to be recognized.

Although the invention has been described with reference to specific examples, it should be remembered that many modifications may be made thereto.

4 sides. FIG. 1 is a developed view of the inner surface of the container material body to which the present invention can be applied.

FIG. 2 is a plan view of a side-seamed stock made from the container stock of FIG. 1, the outer surface thereof being shown.

FIG. 3 is a perspective view of a container made from the materials shown in FIGS. 1 and 2. FIG.

FIG. 4 is a partial sectional view of FIG. 3 taken along line 4-4 and viewed from the direction of the arrow.

The names of the main parts in the figure are as follows.

lO: Container material 16: Upper lid group 16 18: Torso group 20; Bottom cover group 22.24+side edge 34.36° 38.40: Side wall panel 42 Side seam flap 44.46: Triangular end panel 48.50° 52.54 Folded panel 56.58° 60.62 Inner rib panel 64.66 Roof panel 72, Soil edge member 74 Flap 76 Top flap 78 First small flap 80: Second small flap 82.84° 86.88: Folded panel 90: Bottom edge 92, insertion flap 1-゛--F 1;

Claims (1)

Claims: 1. An integral, collapsible laminate material for a sealed liquid container comprising: (a) a layer of bulk material having a predetermined thickness; (b) a predetermined thickness; (c) a first layer of a suitable polyester having a predetermined thickness and forming a uniform coating on the outer surface of said layer of bulk material; a second layer of optional polyester forming a uniform coating on the inner surface of the layer of thick material; (d) selected areas of said second layer of polyester having a predetermined thickness; A material consisting of a layer of polyvinylidene chloride, forming a uniform outer coating. 2. The thickness of the bulk material layer ranges from 0.0123 inches to 0.01 inches.
The material according to claim 1, which has a diameter of 0.0254 inches. 3. Bulky materials include kraft cardboard, foam plastic,
Material 4 according to claim 2, which is one of synthetic cardboard or composite cardboard, material 5 according to claim 1, where the layer of bulk material is on the order of 0.022 inches thick, as appropriate. The thickness of the first layer of polyester is 0.000
The material of claim 1, which is between 5 inches and 0.001 inches. 6. The thickness of the second layer of suitable polyester is 0.001
The material of claim 1, which is between 0.003 inch and 0.003 inch. 7. The material according to claim 6, wherein the polyester layer is made of amorphous polyethylene terephthalate. 8. The material of claim 1, wherein the thickness of the layer of polyvinylidene chloride is between 0.0003 inch and 0.0010 inch. 9. A material according to claim 1, wherein the layer of polyvinylidene chloride is applied to a second layer of suitable polyester by conventional printing techniques. 10. The integrally folded, laminated material to form a sealed liquid container comprises: (a) a layer of kraft cardboard material on the order of 0.022 inch thick; and (b) a layer of said kraft cardboard material. (c) a first layer of amorphous polyethylene terephthalate on the order of 0.0075 inch thick forming a uniform coating on one surface of the layer; and (c) a uniform coating on the other surface of the layer of kraft paperboard material. (d) a second layer of amorphous polyethylene terephthalate on the order of 0.002 inch thick, forming a 0.0005 inch thick polyethylene terephthalate layer fixed to the second layer of amorphous polyethylene terephthalate; The material 11 according to claim 1, which comprises a layer made of vinylidene chloride, the layer of polyvinylidene chloride,
Material 12 according to claim 1, which is formed from a monolithic, collapsible, laminated sheet material material, covering only those areas which are intended to be exposed to the liquid inside, and which is formed from an integral, collapsible, laminated sheet material material, which contains oil, A grease- and solvent-resistant, heat-sealed container comprising four side wall panels forming a tubular body of rectangular cross-section with a fold-down top lid and a fold-down bottom lid, comprising first and second layers of amorphous polyethylene terephthalate. and a third layer formed of cardboard thermally bonded to each side of the first and second layers, and a third layer of polyvinylidene chloride bonded to the second layer of amorphous polyethylene terephthalate. a fourth layer; a container 13 formed from a unitary, collapsible, laminated cardboard material, oil, grease and solvent resistant heat-sealed container comprising: (a) a fold-down top lid and a fold-down bottom; (b) the container is made of amorphous polyethylene terephthalate on the order of 0.022 inches thick and on the order of 0.0015 inches thick; (c) a layer of polyvinylidene chloride fixed to the inner layer of polyethylene terephthalate and on the order of 0.0005 inches thick; A container according to claim 12. 14. The thickness of the cardboard layer ranges from 0.0123 inches to 0.
．． 0.0254 inches, the polyethylene terephthalate layer thickness ranges from 0.0005 inches to 0.003 inches, and the polyvinylidene chloride layer thickness ranges from 0.0005 inches to 0.003 inches.
14. The container of claim 13, wherein the container is between 0.0003 inch and 0.0010 inch. 15. A patent in which a layer of polyvinylidene chloride is applied in a predetermined pattern to correspond to the area of the inner surface of the container exposed to the liquid inside, leaving only the areas coated with polyethylene terephthalate. Claim 1
Container described in item 3.