JPH06219608A - Lengthy elastic body sheet and its manufacture - Google Patents

Abstract

PURPOSE:To obtain a lengthy elastic body sheet whose length can be measured accurately and used and wrought on it favorably preventing variations in thickness and length caused by its expansion and contraction properties at the time of using it or working on it. CONSTITUTION:An expansion/contraction prevention tape 2 made of a material of less expansion and contraction properties is stuck on a part of at least one side of a sheet 1 when the sheet is logged from a block shape logging material by peeling cut or when the sheet is reinspected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a long sheet made of an elastic material such as polyurethane foam and a method for producing the same. More specifically, the length can be accurately measured and at the time of use and processing. The present invention relates to a long elastic sheet that can be used or processed favorably while preventing a change in thickness or length due to stretchability, and a manufacturing method thereof.

[0002]

2. Description of the Related Art Conventionally, when a long sheet made of an elastic material such as polyurethane foam is manufactured, while a block-shaped elastic material is rotated, its surface layer is just cut along the outer circumference by a cutting blade. A so-called peeling cutting is adopted in which a strip is cut so as to face, and this is wound into a roll.

That is, as shown in FIG. 5, a cylindrical block-shaped elastic material 3 is rotated by a motor 4, and the surface layer of this elastic material 3 is placed between two pulleys 5 and 5 along the circumferential surface thereof. A belt-shaped cutting blade 6 that circulates the material is cut into a band shape, which is pulled by a tension roller 7, guided by a guide roller 8 to a winding roller 9, and the sheet 10 cut by the winding roller 9 is rolled. 11
It is manufactured by winding it up and collecting it.

The obtained sheet roll 11 is shown in FIG.
The product is set in the inspector shown in 1 above, inspected, cut to a predetermined length and then shipped. In this case, the inspection operation is as follows. That is, the sheet is unrolled from the roll 11 by the unrolling roller 12, the sheet is pulled by the tension roller 13 while applying a constant tension, and the sheet is rewound by the winding roller 14 and collected. During this time, the measuring roller 16 is rotated by the moving sheet on the tension roller 13, and the length of the sheet is measured by the number of rotations.

[0005]

However, when a long sheet is obtained from a block-shaped elastic material by such a method, since the elastic sheet has elasticity, the obtained length and thickness can be accurately measured. Can not.

That is, there is no problem as long as the elasticity of the elastic sheet is constant, but the expansion and contraction is irregular due to the difference in material, variation in sheet thickness and tension. For this reason, an error occurs in the sheet length. For example, when a thin sheet of urethane foam having a thickness of about 0.5 to 2.0 mm is made into a roll of 100 m or more, the error may reach several meters. This error is one of the causes of shortage or excess when the sheet is used, which lowers the product acquisition rate, and lowers the workability.

Further, in the conventional sheet thus obtained, the thickness and length of the elastic sheet change due to expansion and contraction during use or processing. Especially 0.5-2.2m
In the case of a thin product having a thickness of about m, the rate of change in thickness and length is large, which has a large effect on quality. For example, when manufacturing a laminated sheet by laminating a plurality of sheets, there is a case where one sheet has a surplus due to an error in the length of each sheet, or the laminated sheet having a desired dimension cannot be obtained due to insufficient length. In some cases, a laminated sheet having a certain thickness cannot be obtained.

The present invention has been made in view of the above circumstances, and it is possible to accurately measure the length and prevent the thickness and the length from changing due to stretchability during use or processing, and thus the present invention can be used satisfactorily. Alternatively, it is an object to provide a long elastic sheet that can be processed and a method for manufacturing the same.

[0009]

In order to achieve the above object, the present invention uses a material having a small stretchability along the length direction on at least one surface side portion of a long strip-shaped sheet body made of an elastic material. Provided is a long elastic sheet having a stretch prevention tape attached thereto.

Further, according to the present invention, as a first method of manufacturing this long elastic sheet, a surface layer of a block-shaped elastic material is continuously cut out along the outer periphery to manufacture a long strip-shaped elastic sheet. In the method described above, a stretch-prevention tape made of a material having a small stretchability is continuously attached along the length direction to at least one surface side portion of the sheet immediately after being cut out from the block-shaped elastic material. A method for manufacturing a long sheet is provided.

Further, as a second manufacturing method, after a long elastic sheet cut out from a block-shaped elastic material is wound into a roll and collected, the sheet is unwound from the roll and a certain tension is lost. The sheet length is measured by rotating the measuring roller with the moving sheet while moving the sheet at a fixed interval and winding it again in a roll shape, and when the sheet reaches a predetermined length, the sheet is cut and cut to a predetermined length. In a method for producing a long elastic sheet for obtaining a long elastic sheet having a length, a material having a small stretchability on at least one surface side of the sheet after feeding the sheet from a roll and before applying tension to the sheet. A method for producing a long elastic sheet, comprising the step of continuously sticking a stretch-prevention tape consisting of the sheet along the length direction of the sheet.

[0012]

The long elastic sheet of the present invention is, as described above,
Since a stretch-prevention tape made of a material having low elasticity along the length direction is attached to at least a part of one side of the long strip-shaped sheet body made of an elastic material, the sheet length can be reduced while the sheet lacks tension. Even if the sheet is measured, the length of the sheet can be accurately measured without causing an error due to stretching of the sheet.

Therefore, when the sheet is used or processed, it is not necessary to consider the change in length and thickness due to expansion and contraction, and the sheet can be used or processed with good workability and without causing a problem in dimensional accuracy. In this case, after being cut for use or after processing, the stretch-preventing tape is peeled and removed, whereby the stretchable tape is favorably used as an elastic sheet having good stretchability.

The first and second manufacturing methods can easily and efficiently manufacture such a long elastic sheet without complicated steps. The first manufacturing method is as follows. When a sheet is cut out from a block-shaped elastic material by a peeling cutting method, a stretch prevention tape is attached to the sheet, and the second manufacturing method is
When a roll of a sheet manufactured by a peeling cutting method or the like is inspected, a stretch prevention tape is attached to the sheet.

That is, according to the first manufacturing method, when a sheet is cut out from a block-shaped elastic material using a conventional peeling cutter or the like and the sheet is wound and collected in a roll shape, immediately after cutting the sheet. An expansion prevention tape made of a material having a small elasticity is continuously attached along the length direction of the sheet by using a roller or the like. Specifically, when the cut-out sheet is wound and collected in a roll shape or is moved to be wound in a roll shape, a winding roller for winding the sheet or a tension roller for moving the sheet. The tape is unrolled from an expansion / contraction tape roll having an expansion / contraction tape wound between the sheet and the sheet, and the expansion / contraction tape is continuously attached to one surface of the sheet.

According to the first manufacturing method, the stretch prevention tape is attached immediately after the sheet is cut out and simultaneously with the sheet collecting operation, so that the stretch prevention tape is particularly attached. The long elastic sheet of the present invention can be efficiently produced without requiring any steps. Also,
Since the expansion prevention tape is attached immediately after cutting out the sheet, a sheet with expansion and contraction is obtained almost at the same time as cutting out the sheet, and by adding a length measuring mechanism such as a measuring roller to the peeling cutting machine, It is possible to accurately measure the length at the same time as the manufacturing, and collect it on a roll, and to omit the subsequent inspection step.

Further, in the second manufacturing method, when the roll of the sheet obtained by the conventional peeling cutting method or the like is inspected, the sheet is unrolled from the sheet roll, the length is measured, and the roll is collected again. A stretch prevention tape made of a material having a small stretchability is continuously attached between the sheets along the length direction of the sheet. Specifically, the tape is fed from a roll-out roller that rolls out the sheet from the sheet roll or a roll that stretches the stretch-proof tape between the sheet and the tension roller that applies tension to the sheet during measurement, and stretches the sheet on one side. The prevention tape is applied continuously.

According to the second manufacturing method, since the expansion / contraction prevention tape can be attached at the same time as the inspection, there is no need for a step of attaching the expansion / contraction prevention tape,
The long elastic sheet of the present invention can be efficiently manufactured. In addition, since it is possible to perform the measurement while preventing the expansion and contraction of the sheet by the expansion and contraction prevention tape at the time of inspection, it is possible to accurately detect the sheet and reliably manufacture a long elastic sheet of stable quality. it can.

[0019]

EXAMPLES The present invention will be specifically described below by showing Examples of the present invention. FIG. 1 shows a long elastic sheet according to an embodiment of the present invention. The elastic sheet has small stretchability at both side edges of one surface side of a long strip-shaped sheet body 1 made of an elastic material. The expansion / contraction prevention tapes 2 and 2 made of a material are detachably attached along the length direction.

Here, examples of the elastic body material forming the sheet body 1 include elastic bodies such as polyurethane foam, polyethylene foam, polystyrene foam, and various foamed rubbers. Among them, the sheet can be cut by a peeling cutting method. Polyurethane foam, polyethylene foam, polystyrene foam and the like are preferably used.

Further, the material having a low elasticity, which constitutes the expansion prevention tapes 2 and 2, is not particularly limited as long as it is a material having a elasticity which is sufficiently lower than that of the elastic material. Specific examples thereof include resin films such as polyurethane, acrylic, vinyl chloride, polyethylene, polypropylene, nylon, polyethylene terephthalate (PET), and polyester, non-woven fabric, and Japanese paper.

The thickness of the expansion / contraction preventing tape 2 is appropriately selected according to the material of the tape and is not particularly limited, but is usually 10 to 200 μm, and particularly 30 to 100 μm.
If it is thinner than 10 μm, it may not be possible to effectively prevent the expansion and contraction of the sheet. On the other hand, if it is thicker than 200 μm, the expansion and contraction can be prevented satisfactorily, but the sheet becomes partially too thick to form a roll. It may not be possible to wind, and it is wasteful and uneconomical. In addition, tape 2
The width is not particularly limited, but is usually about 8 to 20 mm from the viewpoint of economy. In addition, the stretchability of the tape 2 is, specifically, the stretch ratio of the tape 2
1/10 or less, and more specifically, the expansion / contraction ratio is preferably 1% or less under a load of 1 kg.

This stretch prevention tape 2 is made of a suitable adhesive,
Although it can be attached to the sheet body 1 using an adhesive, it is particularly preferable to use an adhesive such as an acrylic or butyl rubber adhesive so that it can be peeled off.

Although the thickness of the sheet is appropriately selected according to the application, etc., it is usually 0.5 to 15 mm, and particularly 0.
The effect of the present invention is remarkable in a thin sheet of 5 to 2 mm. Further, the length of the sheet is appropriately selected and is not particularly limited, but the effect of the present invention is particularly remarkable when the sheet has a length of 60 m or more.

According to this long elastic sheet, the stretch prevention tape 2 having small stretchability is formed along the length direction on both side edges of the one side of the sheet body 1 in the form of a long belt made of an elastic material. Therefore, the tape 2 effectively prevents the expansion and contraction of the sheet, and even if the sheet length is measured while the tension is lacking in the sheet, an error due to the elongation of the sheet does not occur, and the length can be accurately measured. You can

Therefore, it is possible to reliably provide a high-quality long-length elastic sheet having excellent dimensional accuracy, and it is not necessary to consider a change in length or thickness due to expansion and contraction when the sheet is used or processed, It can be used or processed with good workability and without causing a problem in dimensional accuracy. Further, in this case, the stretch-preventing tape 2 is peelably attached, and after the sheet is cut for use or after processing, the stretch-preventing tape 2 is peeled and removed from the sheet, so that good stretchability can be obtained. It is well used as an elastic sheet.

The long elastic sheet is not particularly limited, but is preferably manufactured by the following methods, and can be easily and efficiently manufactured by these methods.

That is, in the first manufacturing method, as shown in FIGS. 2 and 3, the long elastic sheet 10 is cut out from the cylindrical block-shaped cutting material 3 by using a conventional peeling cutter, and is rolled. Sheet 10 cut out when collected in 11
A tape 2 is unwound from a tape roll 17 in which the expansion / contraction tape 2 is wound between a tension roller 7 for moving the sheet 10 and the sheet 10, and the expansion / contraction tape 2 is continuously attached to one surface of the sheet 10. Is. The structure and the cutting operation of the peeling cutter are the same as those of the conventional method described above, and therefore the same reference numerals are given and the description thereof is omitted.

According to the first manufacturing method, the sheet 10
Immediately after cutting out the sheet, the expansion and contraction prevention tape 2 is attached simultaneously with the work of collecting the sheet 10, so that the step of attaching the expansion and contraction prevention tape 2 is not particularly required, and the machine length can be increased efficiently. An elastic sheet can be manufactured. Further, since the expansion / contraction prevention tape 2 is attached immediately after the sheet 10 is cut out, a sheet in which expansion / contraction is prevented is obtained almost at the same time as the sheet is cut out, and the peeling cutter is used to extend the length of the measuring roller 16 (see FIG. 3) or the like. By adding the length measuring mechanism, the length can be accurately measured and collected on the roll at the same time as the sheet is manufactured, and it is possible to omit the subsequent inspection step.

In the second manufacturing method, when the roll of the sheet obtained by the conventional method such as the peeling cutting method is inspected, as shown in FIG. When measuring the sheet length on the roller 13, the tension roller 13 and the sheet 1
Tape roll 17 with stretch prevention tape 2 wound between 0
The tape 2 is unwound from the sheet, and the expansion / contraction tape 2 is continuously attached to one surface of the sheet. Since the other structure of the inspecting machine, the inspecting operation and the like are the same as those in the conventional method described above, the same reference numerals are given and the description thereof will be omitted.

According to the second manufacturing method, since the expansion / contraction prevention tape 2 can be attached at the same time as the inspection, the step for attaching the expansion / contraction prevention tape 2 is not particularly required, and the expansion prevention tape 2 can be efficiently used. The long elastic sheet can be manufactured. In addition, the sheet 1 is attached by the expansion / contraction tape 2 during the inspection.
Since it is possible to perform measurement while preventing the expansion and contraction of 0,
The sheet can be accurately inspected, and a long elastic sheet with stable quality can be reliably manufactured.

[0032]

[Experimental example] Next, an experimental example is shown to concretely demonstrate the effect of the present invention.
Explained. Polyester urethane foam (density
30 kg / m³ ) Cylindrical block-shaped elastic material
From peeling cutting method, thickness 1.5mm, width 800
mm urethane foam sheet is cut out and rolled
It was wound and collected.

The urethane foam sheet roll thus obtained was subjected to P using the inspector shown in FIG. 4 in accordance with the second manufacturing method.
ET film adhesive tape (thickness 30 μm, width 10 m
10 m from both side edges of the sheet as m)
It was inspected while adhering to the inside position along the lengthwise direction, and a long urethane foam sheet having a length of 100 m was manufactured.

Further, a long urethane foam sheet was produced in the same manner as above except that the stretch preventive tape was replaced with a nylon nonwoven fabric adhesive tape (thickness 40 μm, width 10 mm). Further, a conventional long urethane foam was manufactured in the same manner except that the stretch prevention tape was not used.

The length of each of these sheets was measured five times by inspecting these sheets using an inspector (manufactured by Nakamura Denso Co., Ltd.) shown in FIG. The results are shown in Table 1. A preset length meter (manufactured by Line Seiki) was used as the length measuring counter.

[0036]

[Table 1]

As can be seen from the results of Table 1, the long elastic roll of the present invention always measures a substantially constant length, and even if the sheet length is measured while the sheet lacks tension, the sheet stretches. It was confirmed that the length can be accurately measured without causing an error and the expansion and contraction of the sheet is reliably prevented. Therefore, it is recognized that the sheet can be used or processed with good workability and without causing a problem in dimensional accuracy or the like without considering the change in length and thickness due to expansion and contraction when the sheet is used or processed.

Further, since the product of the present invention has a good dimensional accuracy of about 100 m in length, the method for producing a long elastic sheet of the present invention ensures a sheet excellent in dimensional accuracy. It was confirmed that it could be easily manufactured.

The long elastic sheet of the present invention is not limited to the above embodiment, and for example, the stretch prevention sheet 2 is attached only to one side edge portion of the sheet body 1. Alternatively, it may be attached to the central portion of the sheet, or may be attached to both sides of the sheet. Further, the sheet body 1 and the expansion / contraction preventing tape 2 may be made of materials other than the above, and other configurations may be variously changed within the scope of the gist of the present invention. Further, the manufacturing method is not limited to the above method, and the tape may be attached in a step different from the step of cutting out the sheet and the inspection.

Further, the method for producing the long elastic sheet of the present invention is not limited to the above embodiment, and the construction of the peeling cutter and the inspecting machine, the cutting procedure, the inspecting procedure, etc. may be appropriately changed. However, other configurations may be variously modified without departing from the gist of the present invention.

[0041]

As described above, according to the long elastic sheet of the present invention, even if the sheet length is measured while the tension is lacking in the sheet, an error due to the stretching of the sheet does not occur, and the sheet is accurately measured. Its length can be measured. Further, even when the sheet is used or processed, it is not necessary to consider a change in length and thickness due to expansion and contraction, and the sheet can be used or processed with good workability and without causing a problem in dimensional accuracy or the like.

Further, according to the method for producing a long elastic sheet of the present invention, the long elastic sheet of the present invention can be easily produced with good dimensional accuracy by using a conventional peeling cutter or inspector. be able to.

[Brief description of drawings]

FIG. 1 is a partial plan view showing a long elastic sheet according to an embodiment of the present invention.

FIG. 2 is a schematic perspective view showing a state in which the long elastic sheet is manufactured by the first manufacturing method of the present invention.

FIG. 3 is a schematic side view showing the same state.

FIG. 4 is a schematic view showing a state in which the same long elastic sheet is manufactured according to the second manufacturing method of the present invention.

FIG. 5 is a schematic perspective view showing a state where a sheet is cut out by a conventional peeling cutting method.

FIG. 6 is a schematic view showing a state where a sheet is inspected by a conventional inspection method.

[Explanation of symbols]

 1 Sheet Main Body 2 Expansion / Contraction Tape 3 Elastic Material (Cutting Material) 4 Motor 5 Pulley 6 Cutting Blade 7,13 Tension Roller 8 Induction Roller 9,14 Winding Roller 10 Elastic Sheet 11 Sheet Roll 12 Feeding Roller 16 Measuring Roller 17 Tape roll

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[Procedure amendment]

[Submission date] May 7, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

Further, as a second manufacturing method, after a long elastic sheet cut out from a block-shaped elastic material is wound into a roll and collected, the sheet is unwound from the roll and a constant tension is applied. The sheet length is measured by rotating the measuring roller with the moving sheet while moving the sheet at a fixed interval and winding it again in a roll shape, and when the sheet reaches a predetermined length, the sheet is cut and cut to a predetermined length. In a method for producing a long elastic sheet for obtaining a long elastic sheet having a length, a material having a small stretchability on at least one surface side of the sheet after feeding the sheet from a roll and before applying tension to the sheet. A method for producing a long elastic sheet, comprising the step of continuously sticking a stretch-prevention tape consisting of the sheet along the length direction of the sheet.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

[0012]

The long elastic sheet of the present invention is, as described above,
Since a stretch-prevention tape made of a material having low elasticity along the length direction is attached to a part of at least one surface side of a long strip-shaped sheet body made of an elastic material, the sheet length can be increased while applying tension to the sheet. Even if the sheet is measured, the length of the sheet can be accurately measured without causing an error due to stretching of the sheet.

[Procedure amendment 4]

[Document name to be amended] Statement

[Name of item to be corrected] 0025

[Correction method] Change

[Correction content]

According to this long elastic sheet, the stretch prevention tape 2 having small stretchability is formed along the length direction on both side edges of the one side of the sheet body 1 in the form of a long belt made of an elastic material. Therefore, the tape 2 effectively prevents expansion and contraction of the sheet, and even if the sheet length is measured while tension is applied to the sheet, an error due to the elongation of the sheet does not occur, and the length is accurately measured. Can be measured.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Name of item to be corrected] 0037

[Correction method] Change

[Correction content]

As can be seen from the results in Table 1, the long elastic roll of the present invention always measures a substantially constant length, and the sheet stretches even if the sheet length is measured while tension is applied to the sheet. It was confirmed that the length can be accurately measured without causing an error and the expansion and contraction of the sheet is reliably prevented. Therefore, it is recognized that the sheet can be used or processed with good workability and without causing a problem in dimensional accuracy or the like without considering the change in length and thickness due to expansion and contraction when the sheet is used or processed.

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0041

[Correction method] Change

[Correction content]

[0041]

As described above, according to the long elastic sheet of the present invention, even if the sheet length is measured while tension is applied to the sheet, an error occurs due to the elongation of the sheet. Without it, its length can be measured accurately. Further, even when the sheet is used or processed, it is not necessary to consider a change in length and thickness due to expansion and contraction, and the sheet can be used or processed with good workability and without causing a problem in dimensional accuracy or the like.

Claims (3)

[Claims] 1. A lengthy strip-shaped sheet body made of an elastic material, to which a stretch-prevention tape made of a material having a small stretchability is attached along a length direction at least on a part of one surface side thereof. Elastic sheet. 2. A method for producing a long strip-shaped elastic sheet by continuously cutting a surface layer of a block-shaped elastic material along an outer periphery thereof, wherein at least one surface of the sheet immediately after being cut from the block-shaped elastic material. A method for producing a long sheet, which comprises continuously sticking a stretch-preventing tape made of a material having a small stretchability along a length direction to a part of the side. 3. A long elastic sheet cut out from a block-shaped elastic material is wound into a roll and collected, and then the sheet is unwound from the roll and moved at regular intervals while lacking a certain tension. The length of the sheet is measured by rotating the measuring roller with the moving sheet while the roll is wound again and collected, and when the predetermined length is reached, the sheet is cut and the long elastic body of the predetermined length is cut. In the method for producing a long elastic sheet for obtaining a sheet, after stretching the sheet from a roll and before applying tension to the sheet, a stretch-preventing tape made of a material having a small stretchability is formed on at least a part of one side of the sheet. A method for producing a long elastic sheet, which comprises continuously adhering along the length direction of the sheet.