JP2796780B2 - Single-sided corrugated multilayer packaging material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a cushioning packaging material (protective material),
The present invention relates to a paper packaging material used as a heat insulating material or a heat insulating material. More specifically, a corrugated continuous layer is polymerized or interlocked and an air layer is formed between the layers to provide cushioning, heat insulating and heat insulating properties. The present invention relates to a single-sided corrugated multi-layer packaging material having enhanced strength.

[0002]

2. Description of the Related Art Conventionally, paper packaging materials and resin air caps having a corrugated surface on one side have been known. These are often used as packing materials, but are sometimes used as heat insulating materials or heat insulating materials.

[0003] The paper packaging material having a corrugated surface on one side has an advantage that it can be easily wrapped even in a curved surface, and can be manufactured by a known single-sided cardboard manufacturing machine (single facer). It is offered at a low price.

[0004] By the way, as for the corrugated cardboard, there is a multi-layer corrugated cardboard as seen in the corrugated cardboard structure. Here, there is a standard for the number of steps, the step height, and the step repetition rate for each step type (flute).

The present invention is different from the double-faced corrugated cardboard in that a flute (layer) is superimposed (layered) directly on one surface of one liner without interposing a liner between layers in terms of structure. However, the main destination is different.

[0006]

Most of the above-mentioned inexpensive paper packaging materials are obtained by polymerizing a continuous layer (flute) of a paper or a paperboard which is corrugated, and is also a thin layer. It was insufficient in terms of shock absorption.

[0007] Therefore, when packing, it is often the case that materials are wasted by using them in double or triple.

On the other hand, regarding a resin air cap,
Although excellent as a cushioning material, the production cost is high, and recycling is even more cost-effective, so that there is a problem that resource recovery (recycling) is difficult.

Under these circumstances, there has been a demand for an inexpensive paper packaging material which can be replaced with a resin air cap and which has high performance and uses (recycles) recycled paper.

The present invention has been made in view of the above circumstances, and solves the above-mentioned problems. The present invention solves the above-mentioned problem by polymerizing or meshing a corrugated continuous layer and forming an air layer between the layers. It is an object of the present invention to provide a single-sided corrugated multilayer packaging material having enhanced heat insulation and heat retention.

[0011]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a single-sided corrugated multi-layer wrapping material, wherein one side of a sheet, a strip or a web (hereinafter referred to as a front liner) of paper or paper board. A continuous layer (hereinafter, referred to as a flute) having corrugations having different pitches is sequentially polymerized or meshed.

Preferably, the multi-layer formation is to superimpose or mesh a large waveform flute on a small waveform flute, and the large waveform half-wave peak has at least one small waveform peak. It encompasses or encompasses half-wave peaks or valleys.

Further, in any of the above embodiments, the cross-sectional shape of at least the uppermost layer of the flute in the corrugation has a periodic function including a sine curve, a rectangle or a trapezoid.

[0014]

The buffering, heat insulating and heat retaining properties are enhanced by directly polymerizing or meshing flutes of large and small waveforms with different pitches on one surface of the front liner to form a multilayer.

[0015]

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic cross-sectional view of a double-sided single layer according to an embodiment of the present invention. FIG. 1 (a) shows a state in the middle of a manufacturing process of polymerizing or meshing the upper flute, and FIG. Shows the state of the product (after product).

Here, 1 is a front liner, 2 is an A flute, 3 is a B flute, 4 is an air layer (chamber), and X is a single-sided corrugated multilayer packaging material.

As shown in the figure, the single-sided corrugated multilayer packaging material (X) of the present invention is obtained by polymerizing or meshing flutes (2, 3) with different pitches on one side of a front liner (1). However, it is preferable that the formation of the multilayer by the polymerization or the meshing of the flutes (2, 3) is performed with a small corrugated A flute (2).
A large waveform B flute (3) is overlapped or meshed with the upper waveform, and a half-wave peak of the large waveform [B flute] (3) has at least one small waveform [A flute] (2) Of the peak or valley having a half wavelength of

This manufacturing technique can be manufactured by repeating a corrugating process using a known single-faced corrugated cardboard manufacturing machine (single facer) while changing the waveform pitch without interposing a liner between layers.

The position of the overlap or meshing on the A flute (2) may be arbitrary. That is, it is not necessary to set the waveform pitch of each of the flutes (2, 3) to an integer ratio.
The cross-sectional shape (or volume) of (4) may be arbitrary.

Further, there is a case where the cross-sectional shape of the flute is modified in order to obtain an effect in manufacturing or use. In this regard, it is considered that at least the cross-sectional shape of the flute in the uppermost layer is a periodic function including a sine curve, a rectangle, or a trapezoid. FIG. 2 shows an example of this. This kind of modification may be appropriately made, and is all included in the protection scope of the present invention.

[0022]

According to the present invention, there is provided the above structure.
According to this, since flutes having large and small waveforms having different pitches are polymerized or meshed to form a multi-layer, it is possible to provide a packaging material with enhanced cushioning, heat insulation and heat retention.

In addition to resource recovery (recycling) by using recycled paper, manufacturing is easy only by changing the process using an existing single-sided cardboard manufacturing machine (single facer), and the required cost can be greatly reduced.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic cross-sectional view of a single-sided two-layer structure according to an embodiment of the present invention. (Product)
The state of is shown.

FIG. 2 is a schematic cross-sectional view of a single-sided, two-layer structure according to another embodiment of the present invention, showing a state in the middle of the manufacturing process when the cross-sectional shape of the upper flute is substantially rectangular (trapezoidal).

[Explanation of symbols]

1 front liner (sheet or strip or web of paper or paper board) 2 A flute (continuous layer corrugated; small corrugated) 3 B flute (continuous layer corrugated; large corrugated) 4 air layer (chamber) X Single-sided corrugated multilayer packaging material

Claims (2)

(57) [Claims] Has 1. A laminated structure, and, in the multi-layer packaging material obtained by forming an air layer between the layers, a sheet of paper or paper board, on one side of the strip or web, was subjected to different waveforms pickled pitches A single-sided corrugated multilayer packaging material, characterized in that a continuous layer is formed by multilayering by successively polymerizing or interlocking. 2. The method according to claim 1, wherein the formation of the plurality of layers is such that a continuous layer of a large waveform overlaps or meshes with a continuous layer of a small waveform, and a half-wave peak of the large waveform has at least one half-wave of the small waveform. The single-sided corrugated multilayer packaging material according to claim 1, wherein the packaging material includes or covers the peaks or valleys.