JP2000318069A - Bubble sheet material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bubble sheet material based on a bubble sheet, freely bendable along a fold line like paper or cloth. SOLUTION: A bubble sheet material 1 consists of a bubble sheet 2 wherein a large number of closed cells 2a in which air is hermetically sealed are formed in a synthetic resin film 2b and the cover sheets 3 superposed on both surfaces of the bubble sheet 2 and needle holes 5 continuing in a dotted line are bored in the bubble sheet material so that they pierce the bubble sheet 2 and the cover sheets 3 so as to traverse the closed cells 2a of the bubble sheet 2 and yarn is passed through the needle holes 5 to integrally sew all of sheets 2, 3 to form a folding sewing line 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foam sheet material mainly composed of a foam sheet formed by forming a large number of closed cells in which a gas is sealed on a synthetic resin film.

[0002]

2. Description of the Related Art The above-mentioned bubble sheet is known and is mainly used as a cushioning material for transporting articles (see Japanese Patent Application Laid-Open No. H10-180869).

[0003]

Although the foam sheet is made of synthetic resin and has flexibility, it is folded and folded like paper or cloth by the thickness and elasticity of the closed cell.
There is a drawback that the product can be deployed immediately by itself even if the article is wrapped. In addition, the conventional bubble sheet is a synthetic resin product, and thus tends to generate static electricity. Therefore, there is a problem that it is difficult to use it for packaging electronic devices that are sensitive to static electricity such as a computer.

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and an object of the present invention is to provide a foam sheet material which is made of a foam sheet as a main material and can be bent along a folding line like paper or cloth. It is in.

[0005]

In order to achieve the above-mentioned object, the present invention provides a method for manufacturing a cell, comprising using a bubble sheet formed by forming a large number of closed cells with gas sealing on a synthetic resin film, and a cover sheet. The cover sheet is superimposed on one side and / or both sides of the sheet, and a continuous needle hole is formed in a dotted line so as to penetrate the bubble sheet and the cover sheet and cross the closed cell of the bubble sheet. The present invention provides a foam sheet material in which the two are sewn together through a thread to form a folded suture line.

When the bubble sheet and the cover sheet are overlapped to form a needle hole, the closed-cell body having the needle hole leaks out of gas and is crushed. Then, if a folded suture line is formed by passing a thread through the needle hole, the closed cell is crushed and squeezed thinly at that portion, so that there is no so-called "hip", it is possible to bend freely and return to the deployed state. No reaction force occurs. In addition, since the bubble sheet itself is made of a thin synthetic resin film, if a needle hole is continuously pierced in a dotted line, it becomes a perforated line and is easily broken, but if the bubble sheet and the cover sheet are joined together, Such a decrease in strength can be compensated for by the cover sheet.

[0007] In addition, since the bubble sheet plays a role of a core material exclusively and the cover sheet is in contact with the article, if the cover sheet is made of a material such as cotton that does not easily generate static electricity, it can be used as a packing material for electronic devices and the like that are susceptible to static electricity. Can be used with confidence.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 (a) and 1 (b) are enlarged cross-sectional views of main parts showing a method for manufacturing a bubble sheet material.

The bubble sheet material 1 of the present invention comprises a bubble sheet 2
And the cover sheet 3.

[0010] The bubble sheet 2 is made of a cylindrical closed cell 2a in which gas (air) is sealed.
It is a known material formed in a sandwich shape between 2b. Of course, the structure of the bubble sheet 2 is not limited to this, and for example, the closed cell 2 of the bubble sheet 2
A two-layer structure without the synthetic resin film 2b on the upper surface a or a structure in which the bubble sheets 2 are overlapped on two sheets may be used.

On the other hand, the cover sheet 3 is made of cloth, and in this embodiment, cotton is used. The material of the cover sheet 3 is not particularly limited, but when it is necessary to take a countermeasure against static electricity, a material that does not easily generate static electricity such as the cotton is preferable. Although not shown, the cover sheet 3 may be directed to only one side of the bubble sheet 2.

The cover sheet 3 and the bubble sheet 2 are integrated as follows. That is, first, as shown in FIG.
3 and cover sheet 3 as shown by the two-dot chain line in FIG.
A needle hole 5 is formed through the cover sheets 3 and 3 and the bubble sheet 2 through the needle 4 from outside the needle hole 5 and the needle hole 5 is formed in a dotted line in a direction perpendicular to the paper surface and across the closed cell body 2a. The thread 6 is inserted into the needle hole 5 as shown in FIG.
To form a folded suture line 7. As described above, although the closed air bubbles 2a are provided in the air bubble sheet 2, the closed air bubbles 2a having the needle holes 5 are naturally crushed due to the escape of gas as shown in FIG. Is narrowed down to bend freely. Further, since the bubble sheet 2 is sewn to the cover sheets 3, 3, there is no possibility of displacement.

The operation of opening the needle hole 5 in the cover sheet 3 and the bubble sheet 2 and the operation of passing the thread 6 through the needle hole 5 may be simultaneously performed by passing the thread 6 through the needle 4 in the same manner as performing ordinary sewing. Existing household or industrial sewing machines can also be used. As is well known, the sewing machine has a ski plate-shaped "hold" so that the sewing proceeds while holding the fabric. Therefore, the foam sheet 2 and the sewing machine having the thick and resilient closed cell 2a are provided. It seems incompatible, that is, the bubble sheet 2 cannot be stitched. However, in practice, the closed foam 2a is instantly crushed with the needle 4 of the sewing machine and slides under the "hold", so that the cover sheets 3, 3 and the foam sheet 2 are sewn in the same manner as sewing ordinary cloth. Can be sewn by sewing.

[0014]

FIG. 2 to FIG. 5 show a first embodiment.
Is a perspective view of the bubble sheet material, FIG. 3 is an exploded perspective view of the bubble sheet material including a partially enlarged view, FIG. 4 is an exploded perspective view of the bubble sheet material showing another manufacturing method, and FIG. FIG.

The bubble sheet material 1A of the first embodiment is used as a cushioning material for packing an article X as shown in FIG. As shown in FIG. 3, a specific manufacturing method of the present foam sheet material 1A is as follows. First, the cover sheet 3 is folded in two, and the peripheries are sewn to form a bag with an open mouth. Put bubble sheet 2 inside. Next, as described above, a needle hole 5 penetrating the cover sheet 3 and the bubble sheet 2 through the needle 4 from the outside of the cover sheet 3 is continuously formed in a dotted line, and a thread 6 is passed through the needle hole 5 as shown in FIG. A bent suture line 7 is formed. As described above, the closed-cell body 2a of the bubble sheet 2 is crushed by the needle hole 5, and the bent suture line 7 is thinly narrowed.

In the method of manufacturing the foam sheet material 1A, the cover sheet 3 is not folded into a bag shape as described above, but is sandwiched in the folded state as shown in FIG. The periphery may be sutured together. By doing so, the step of forming the cover sheet 3 into a bag shape can be omitted, so that workability is improved.

Since the bubble sheet material 1A can be freely bent at the folding seam 7, it can easily follow the shape of the article X as shown in FIG. Work such as tying X with a string while wrapping it with the bubble sheet material 1 can be performed efficiently. In addition, since the bubble sheet material 1A can be folded at the folding suture line 7, it is easy to compactly store and return the article X in an empty container after taking out the article X. As a result, the bubble sheet material 1A Can be used repeatedly. By the way,
The conventional bubble sheet is unfolded as it is even if it is packed as described above, so an adhesive tape is used to hold it down. However, since the bubble sheet breaks when the adhesive tape is peeled off, it is often disposable.

Further, when a material such as cotton that is unlikely to generate static electricity is selected as the material of the cover sheet 3, an excellent effect is obtained in packing electronic devices such as computers and the like which are susceptible to static electricity. In the past, so-called quilting in which a cotton cover was filled with cotton and sewn was used to pack the electronic device. However, the bubble sheet material 1A of the present invention is compared with quilting of the same thickness.
There is an advantage that it is excellent in cushioning property, light weight, heat insulating property and inexpensive.

[0019]

Second Embodiment FIGS. 6 and 7 show a second embodiment.
FIG. 7 is a perspective view of a bubble sheet material, and FIG. 7 is a side view showing a use state. The bubble sheet material 1B of Example 2 is used as a cover for a keyboard 8 of a computer. The bubble sheet material 1B includes an underlay portion 50 on which the keyboard 8 is placed and a cover portion 51 covering the upper surface of the keyboard 8, and only the cover portion 51 contains the bubble sheet 2. Cover part 5
1 has a size and a shape that can cover the upper surface of the keyboard 8 in the unfolded state, but has a folded suture line 7 extending substantially in the center as shown in FIG.

When the keyboard 8 is not used, the cover 51 is expanded to cover the upper surface of the keyboard 8 as shown by a dashed line in FIG.
7 is folded in two at the central folded suture line 7 as shown by the solid line in FIG. Then, the bubble sheet 2 inside has a moderate elasticity as a cushion on which the wrist of the operator of the keyboard 8 is placed, and the cover sheet 3 made of cloth softens the cold feeling of a personal computer desk or the like. Note that the underlay portion 50 is not essential in the bubble sheet material 1B of the second embodiment, and the cover portion 51 is not required.
The number of bends by the folded suture line 7 is arbitrary in two or more folds.

[0021]

Third Embodiment FIG. 8 is a perspective view of a bubble sheet material according to a third embodiment. The bubble sheet material 1C of the third embodiment is used as a rug for a person to sit on. This foam sheet material 1C has sufficient elasticity even if it is thin due to the closed cell body 2a of the foam sheet 2; second, it is lightweight;
It has a water-resistant structure so that it does not allow moisture to reach the surface even if the ground is wet. Fourth, it can be folded compactly with the folded suture line 7, making it suitable for sports events, picnics, fishing, outdoor banquets, etc. It has an excellent effect as a portable cushion (cushion) laid on the ground.

The bubble sheet material 1 (1A to 1A) of the present invention
Specific examples of the use of C) are described in Examples 1 to 3,
Needless to say, the bubble sheet material 1 of the present invention can be used for a wide range of applications by taking advantage of its superior properties such as excellent heat retention and heat retention in addition to the above.

[0023]

As described above, the foam sheet material of the present invention crushes the closed cell by forming a needle hole penetrating the closed cell by stacking the cover sheet on the bubble sheet, and passing the thread through the needle hole to form a folded suture line. As a result, the closed cell body is crushed and thinly squeezed at the bent suture line so that there is no so-called "hip", so that it can be bent freely, and furthermore, no reaction force returning to the deployed state occurs.
Therefore, the usability of the foam sheet material of the present invention is greatly improved as compared with the conventional foam sheet made of a synthetic resin alone.

Furthermore, in the foam sheet material of the present invention, since the foam sheet serves as a core material and the cover sheet is in direct contact with the article, if the cover sheet is made of a material such as cotton that does not easily generate static electricity, It can be safely used as a packaging material for electronic devices that are sensitive to static electricity.

[Brief description of the drawings]

1 (a) and 1 (b) are enlarged cross-sectional views of main parts showing a method for manufacturing a foam sheet material.

FIG. 2 is a perspective view of a bubble sheet material.

FIG. 3 is an exploded perspective view of a bubble sheet material including a partially enlarged view.

FIG. 4 is an exploded perspective view of a bubble sheet material showing another manufacturing method.

FIG. 5 is a side view showing a packed state of an article.

FIG. 6 is a perspective view of a bubble sheet material.

FIG. 7 is a side view showing a use state.

FIG. 8 is a perspective view of a bubble sheet material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 (1A-1C) ... Bubble sheet material 2 ... Bubble sheet 2a ... Closed cell 2b ... Synthetic resin film 3 ... Cover sheet 5 ... Needle hole 6 ... Thread 7 ... Bending suture line

Claims (1)

[Claims] 1. A foam sheet formed by forming a large number of closed cells sealed with a gas on a synthetic resin film, and a cover sheet, wherein the cover sheet is overlapped on one and / or both sides of the foam sheet. A continuous needle hole is formed in the dotted line so as to penetrate the bubble sheet and the cover sheet and cross the closed cell body of the bubble sheet, and furthermore, a thread is passed through the needle hole to sew the two together to form a folded suture line. A foamed sheet material characterized by being made.