JPH0849163A - Frayproofing processing method for flexible container material - Google Patents

Abstract

PURPOSE:To provide the subject method characterized by mutually superposing the respective cut ends of laminating sheets as flexible container material to heat bond the cut ends after covered with thermal adhesive tapes to highly easily prevent both the cut ends from fraylng. CONSTITUTION:The respective cut ends 4, 4' of a flexible container material consisting of a laminated sheet 3 prepared by laminating thermoplastic resin layers 2 on a yarn cloth 1 woven from plastic film ribbon pieces (e.g. tape yarns, flat yarns) as both warps and wefts are mutually superposed, and the superposed part 5 is laminated with thermal adhesive tapes 6, 6' so as to cover both the cut ends 4,4' and then heat bonded, thus the yarn 1 can easily be prevented from fraying. By this method, the thickness of the heatbonded part can be made sufficiently low, also being good in appearance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn cloth (in the present invention, a yarn cloth is a cloth formed by weaving a width piece of a plastic film called a tape yarn, a flat yarn, a ribbon yarn or the like as warp and weft. In a flexible container made of a laminated sheet in which a thermoplastic synthetic resin is laminated on (1), the yarn cloth and the synthetic resin laminate are separated from each other during use to prevent fraying of the yarn cloth. It relates to a stop processing method.

[0002]

2. Description of the Related Art In a conventional flexible container, a laminated sheet, which is a raw material, has a cut end portion, which is called "ultra processing", in which a tape is folded back and sandwiched to cover it.

[0003]

According to this ultra processing, the purpose of preventing fraying is achieved, but the cut end of the laminated sheet becomes thick as a tape, a laminated sheet, and three layers of tape are overlapped. When the cut end parts are overlapped, this part also becomes a six-ply overlap, which is not preferable in the work of forming the container body, and in order to fold the tape to cover it, it is special for this work. It required a processing machine. From these things, this invention makes it a subject to provide the anti-fray processing method that an overlapping part does not become thick and a special processing machine for processing is unnecessary.

[0004]

In order to solve the above-mentioned problems, the present invention has a laminated sheet 3 formed by laminating a yarn cloth 1 with a thermoplastic synthetic resin 2 and a cut end 4 and a cut end 4'overlapped with each other. In the mating portion 5, the heat-bonding tape 6 is heat-bonded to cover the cut end 4 and the heat-bonding tape 6'is heat-bonded to cover the cut end 4 '.

The thermoplastic synthetic resin 2 to be laminated on the yarn cloth 1 in the present invention may be any as long as it can be laminated on the yarn cloth 1 and can be heat-bonded to the heat-adhesive tape 6. It is preferable from the standpoints of economy, ease of handling, and other points.

The shape of the heat-adhesive tape 6 in the present invention may be woven cloth, film or the like, but a film made of a thermoplastic synthetic resin is preferable in consideration of the thickness of the overlapping portion after processing.

The heat-adhesive tape is not folded back and is laid over the laminated sheet including the cut end portion and the laminated sheet laminated on the laminated sheet, and heat-bonded thereto.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a vertical cross-sectional side view of a material for a flexible container, showing a state in which a single laminated sheet is folded and laminated by the method of the present invention, and a sealing process is performed. Figure 2
Is a vertical cross-sectional side view of a flexible container material showing a state in which cut end portions of two laminated sheets are overlapped with each other and sealing processing is performed by the method of the present invention. FIG. 3 is a vertical sectional side view of a laminated sheet which is a material for a flexible container used in the method of the present invention.

In the figure, reference numeral 1 is a yarn cloth, which is a cloth formed by weaving narrow pieces of a plastic film called tape yarn, flat yarn, ribbon yarn, etc. as warp and weft, which is usually plain weave. To be Reference numeral 2 denotes a thermoplastic synthetic resin laminated on the yarn cloth 1, which is usually applied to both sides of the yarn cloth 1. The laminated sheet 3 obtained by laminating the thermoplastic resin 2 on the yarn cloth 1 serves as a material for the flexible container. Reference numerals 4 and 4 ′ are the cut ends of the laminated sheet 3. When the cut ends 4 and 4 ′ are cut into flexible containers, the cut ends 4 and 4 are in use.
The present invention is a processing method for preventing the 4'from fraying. Therefore, the laminated sheet 3 is bent, the cut end portions 4 and 4'are overlapped, and at the overlapping portion 5,
The heat-bonding tape 6 is heat-bonded to cover the cut end 4 and the heat-bonding tape 6'is heat-bonded to cover the cut end 4 '.

In this manner, the cut ends 4 and 4'of the laminated sheet 3 are heat-bonded to each other, and the heat-bonding tape 6 covers the cut end 4 and is cut on the cut end 4 in an overlapping manner. The laminated sheet 3 of the cut end 4 is overlapped with the laminated sheet 3 of the end 4 ′ and is heat-bonded, and the thermal adhesive tape 6 ′ covers the cut end 4 ′ and is overlapped with the cut end 4 ′. Are overlapped with each other and heat-bonded to prevent fraying. The work procedure in this work process is roughly classified into the following three ways.

That is, when the cut ends 4 and 4'are overlapped with each other, as shown in FIG.
Has a cutting end portion 4 and a cutting end portion 4 ', and these cutting end portions 4 and 4'are overlapped, and as shown in FIG. 2, the laminated sheet 3 having the cutting end portion 4 and the cutting end portion 4 are cut. There is a case in which the laminated sheet 3'having the end portions 4'is superposed, but in any case, the working procedure is the same, and the working procedure will be described with reference to FIG.

First, as the first working procedure, the cut end 4 and the cut end 4'of the laminated sheet 3 are superposed on each other and the superposed portion 5 is heat-bonded. Then, the cut end portion 4 is covered and the thermal adhesive tape 6 is overlapped. Also, the heat-bonding tape 6'is overlapped with the heat-bonding tape 6 by covering the cut end 4 '.
Heat bond 6'at the same time. Thermal adhesive tape 6,
The heat-bonding of 6'may be performed by heat-bonding both tapes simultaneously or separately.

In the second working procedure, the cut end 4 and the cut end 4'of the laminated sheet 3 are overlapped with each other, the cut end 4 is covered with the thermal adhesive tape 6 again, and the cut is performed again. The heat-bonding tape 6'is overlapped to cover the end 4 ', and heat-bonding is performed in this state. After cutting the cut-off end and the heat-bonding tape, the heat-bonding tape 6'is put together at once. It will be heat-bonded.

The work procedure 3 will be described with reference to FIG. 2. First, half of the width of the heat-bonding tape 6 is heat-bonded to the laminated sheet 3 including the cut end 4. Next, half of the width of the heat-bonding tape 6'is heat-bonded to the laminated sheet 3'including the cut end 4 '. Next, the laminated sheet 3 of the cut end 4 and the laminated sheet 3'of the cut end 4'are overlapped with each other, and the unbonded portion of the thermal adhesive tape 6 is overlapped on the laminated sheet 3 '.
Further, the unbonded portions of the thermal adhesive tape 6'are superposed on the laminated sheet 3, and the unbonded portions of the thermal adhesive tapes 6 and 6'are thermally bonded to the laminated sheets 3 ', 3.

[00015]

According to the present invention, the cut end of the laminated sheet does not have to be folded back to sandwich the cut end unlike the conventional one, so that the cut end can be thin, and the product is flexible. The appearance of the container is remarkably improved, and unlike the conventional one, it does not require a special machine for folding the tape, and since it is a flat seal, it can be sufficiently operated even by a simple sealer. In particular, when a method is used in which a heat-bonding tape is heat-bonded to a laminated sheet beforehand at the cut end, leaving a dimension that requires heat-bonding at the time of assembly, heat-bonding of the heat-bonding tape has been commonly used from the past. By installing a sealer alongside the spreading machine, simultaneous processing is possible. Thus, the sealing method is simple, it can be automated, and no special skill is required.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side view of a material for a flexible container, showing a state in which one laminated sheet is bent and overlapped by the method of the present invention, and a sealing process is performed.

FIG. 2 is a vertical cross-sectional side view of a flexible container material showing a state in which cutting portions of two laminated sheets are overlapped with each other and sealing processing is performed by the method of the present invention.

FIG. 3 is a vertical sectional side view of a laminated sheet which is a material for a flexible container used in the method of the present invention.

[Explanation of symbols]

 1 Yarn Cloth 2 Thermoplastic Synthetic Resin Laminate 3 Laminated Sheet 4, 4'Cut Edge 5 Lap Section 6, 6'Heat Adhesive Tape

Claims (4)

[Claims] 1. A cut end portion (4) of a laminated sheet (3) obtained by laminating a thermoplastic synthetic resin (2) on a yarn cloth (1), and an overlapping portion () of the cut end portion (4) '. 5), covering the cut end portion (4) with the thermal adhesive tape (6),
A method for preventing fraying of a material for a flexible container, which comprises heat-bonding a heat-adhesive tape (6) 'covering the cut end (4)'. 2. The cut ends (4) and (4) 'are first superposed and heat-bonded to each other, and then, at the superposed part (5) between the cut ends (4) and (4)', the cut ends are formed. Thermal adhesive tape (6) covering the part (4) and thermal adhesive tape (6) 'covering the cut end (4)'.
A method for preventing fraying of the described flexible container material. 3. The cut ends (4) and (4) 'are superposed on each other, and the cut end (4) of the superposed part (5) is covered with a thermal adhesive tape (6), and the cut end is also covered. (4) 'is covered with a thermal adhesive tape (6)', and then the cut ends (4) and (4) 'and the cut ends (4), (4)' and the heat adhesive tape (6), ( The method for preventing fraying of a material for a flexible container according to claim 1, wherein heat bonding with 6) 'is performed at the same time. 4. A heat-bonding tape (6) covering the cut end (4) and a heat-bonding tape (6) 'covering the cut end (4)' are respectively heat-bonded, and then the cut end (6). 4) and (4) 'are superposed, and then cut ends (4),
(4) 'Thermally bonding the thermal adhesive tape (6) to the cut end (4)' and the thermal adhesive tape (6) 'to the cut end (4). A method for preventing fraying of the described flexible container material.