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Paper container

A technology for paper containers and container materials, which is applied in the direction of containers, rigid containers, sustainable manufacturing/processing, etc., and can solve problems such as increasing the implementation of half-cutting processes

Inactive Publication Date: 2004-01-07
NIPPON PAPER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method requires an additional half-cutting process in the manufacturing process of the paper container, and there is a problem that a corresponding device is required.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] figure 1 It is a cross-sectional view showing the laminated structure of the paper container with straw holes of Example 1.

[0053] In this paper container, the thermoplastic synthetic resin layer 3 made of a low-density polyethylene layer with a thickness of 15 μm is provided with the through-hole 2 that becomes the straw hole 14 from the outside toward the inside (the side where the contents are wetted). The weight of the paper is 200g / m 2 Base material 1, thermoplastic synthetic resin layer 7 with a thickness of 15 μm made of low-density polyethylene, and a paper weight of 30 g / m 2 A thin paper layer 8 with a thickness of 40 μm and a thermoplastic synthetic resin layer 4 made of low-density polyethylene with a thickness of 15 μm are laminated to form a laminated structure.

[0054] A laminated body having the above laminated structure is produced as follows. First, through a thermoplastic synthetic resin layer 7 made of low-density polyethylene with a thickness ...

Embodiment 2

[0057] figure 2 It is a cross-sectional view showing the laminated structure of the paper container with a straw hole in Example 2.

[0058] In this paper container, the thermoplastic synthetic resin layer 3 with a thickness of 15 μm made of low-density polyethylene and the paper with the through hole 2 that becomes the straw hole 14 are provided with a weight of 200 g / m 2 Base material 1, thermoplastic synthetic resin layer with a thickness of 15 μm composed of low-density polyethylene 7, black printing layer 9, paper weight 40g / m 2 A thin paper layer 8 with a thickness of 50 μm, a barrier resin layer 10 with a thickness of 10 μm made of ethylene-vinyl alcohol, and a thermoplastic synthetic resin layer 4 with a thickness of 20 μm made of low-density polyethylene are laminated to form a laminated structure.

[0059] A laminated body having the above laminated structure is produced as follows. First, the black printing layer 9 faces the base material 1 side, and through th...

Embodiment 3

[0062] image 3 It is a sectional view showing the laminated structure of the paper container with a straw hole of Example 3.

[0063] In this paper container, the thermoplastic synthetic resin layer 3 made of a low-density polyethylene layer with a thickness of 15 μm is provided with the through-hole 2 serving as the straw hole 14 from the outside toward the inside (the side where the contents are wetted), and the weight of the paper is 200g / m 2 Base material 1, thermoplastic synthetic resin layer 7 with a thickness of 15 μm composed of low-density polyethylene, black printing layer 9, and paper weight of 20 g / m 2 Thin paper layer 8 with a thickness of 30 μm, barrier resin layer 10 made of ethylene vinyl alcohol with a thickness of 10 μm, white printed layer 11, paper weight 20 g / m 2 A thin paper layer 12 with a thickness of 30 μm and a thermoplastic synthetic resin layer 4 made of low-density polyethylene with a thickness of 20 μm are laminated to form a laminated structur...

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Abstract

A paper container has synthetic resin layers (3) and (4) constituting at least the outermost and innermost surfaces of a laminated structure with paper as a base material (1), the base material (1) being provided with a through-hole (2) serving as a liquid take-out port, in which the paper container is of laminated construction in which the through-hole (2) is covered from inside by a layered material of at least two layers made of an integration of the synthetic resin layer (4) or (10) and a thin paper layer (8). The rigidity of the thin paper layer (8) is imparted to the synthetic resin layer (4) or (10) with which the thin paper layer (8) is integrated. This suppresses the elongation of the synthetic resin layer (4) or (10) to facilitate the piercing of the through-hole (2) portion with a straw or the cutting-off of the through-hole (2) portion.

Description

technical field [0001] The present invention relates to a paper container for liquid food, which is made of thin paper and more natural materials than aluminum foil is removed from the laminated structure of container materials, and the laminated body covering the liquid outlet from the inside is used. Background technique [0002] Paper containers for liquid food such as milk and juice, such as Figure 9 , Figure 10 As shown, a paper container with such a layer structure is generally used, that is, a base material 1 made of paper is provided with a through hole 2 as a liquid outlet, and at least the outermost and innermost (content wetted surface) are laminated. Synthetic resin layers 3, 4 such as low-density polyethylene. [0003] Figure 9 It is a paper container with a straw hole 14 in which the above-mentioned through-hole 2 is used, and the synthetic resin layers 3 and 4 blocking the through-hole 2 of the base material 1 are pierced with a straw to open the through-h...

Claims

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Application Information

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IPC IPC(8): B65D5/72
CPCB65D5/72B65D2231/02Y10T428/1303B65D5/74Y02W90/10
Inventor 高桥尚生佐濑和彦奥山秀树
Owner NIPPON PAPER IND CO LTD