JPH06144710A - Adhesive tape reeled body of plastic foaming body - Google Patents

Abstract

PURPOSE:To provide a plastic foaming body adhesive tape reeled body capable of manufacturing at high productivity and low cost and without restriction of tape width and having a vertical and flat cutting surface. CONSTITUTION:A wide plastic foaming body adhesive sheet with a tape base material 2 formed with plastic foaming body is wound by a specified length of tape on a core 1 formed with a base material which has approximately the same cutting resistance as that to the tape base material 2 to manufacture a wide roll. Then the multiple wide roll are placed on a movable stand, the plastic foaming body adhesive sheet T is cut together with the core 1 to a specified tape width by a vertical splitter to manufacture a plastic foaming body adhesive tape reeled body R.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic foam adhesive tape wound body.

[0002]

2. Description of the Related Art Generally, a ribbon-shaped (narrow width) plastic foam adhesive tape (hereinafter referred to as a plastic foam adhesive tape winding body) R wound in a roll is manufactured in a long length for industrial production. The formed plastic foam adhesive sheet is wound up to produce a wide jumbo roll 10, and a plurality of blades 11 are set to have a predetermined tape width.
By making a slit between them, a plurality of parallel ribbon-shaped plastic foam adhesive tapes are created by simultaneously slitting them, and the same number of slit ribbon-shaped plastic foam adhesive tapes are used. There is known a method in which the foam adhesive tape is preliminarily cut into the same width as the foam adhesive tape and wound around a winding core 13 set on the rotating shaft 12 in a roll shape with a predetermined length (see FIG. 3).

Further, a method of manufacturing a wide roll by winding a wide plastic foam pressure-sensitive adhesive sheet, which has been cut into a predetermined tape length in advance, around a predetermined winding core, and cutting the wide roll into a predetermined tape width together with the winding core. , For example, a plastic foam pressure-sensitive adhesive sheet is wound in a roll shape on a winding core 23 that is hard and has a considerable strength to manufacture a wide roll 20, and both ends of the wide roll 20 are fixed to a rotary shaft 22.
A plurality of fixed blades or rotary blades 21 provided at intervals of a predetermined tape width are pressed against a wide roll 20 that is rotating, and a plurality of plastic foam adhesive tape winding bodies R are simultaneously formed by ring-slicing together with a winding core 23. 4 (see FIG. 4), or one or a plurality of wide rolls 30 having the same width are placed on the movable base 34 with their ends aligned in the same direction, and then one end is vertically split (band knife).
31 together with the core 33 perpendicular to the axial direction of the core 33 to form a single or a plurality of plastic foam adhesive tape rolls R, and all the wide rolls 30 through the movable base 34. There is also known a method (see FIG. 5) in which the tape is fed by a predetermined tape width in the axial direction and sequentially cut.

Although not shown in detail, a rotary shaft is inserted into the core and one end thereof is fixed, and while the wide roll is being rotated, it is wound by a fixed blade or a rotary blade in a direction perpendicular to the axial direction of the core. There is also known a method in which a core is cut into a predetermined tape width, and a wide roll is sequentially fed in the axial direction by a predetermined tape width to successively cut the roll.

[0005]

However, in the method shown in FIG. 3, in which a slitted ribbon-shaped plastic foam adhesive tape is wound into a ribbon width and a predetermined length is wound around the core, the plurality of parallel ribbon-shaped plastic foam adhesive tapes are wound. It is troublesome to attach the ribbon-shaped plastic foam adhesive tapes to the corresponding cores one by one, and to attach a plurality of ribbon-shaped plastic foam adhesive tapes to the plurality of cores with the same tension. It requires a great deal of skill and requires a high level of skill and equipment to keep all ribbon-shaped plastic foam adhesive tapes attached to the core in the same tension balance until the end of winding. There was a drawback that productivity was inferior to the method of cutting into pieces.

On the other hand, in the method shown in FIGS. 4 and 5 in which the wide roll is sliced, a certain strength is required for the winding core for the winding operation, so that the paper is spirally formed to a thickness of 0.5 to 10 mm. A paper tube which is rolled up and laminated is used (see, for example, Japanese Utility Model Laid-Open No. 63-50851).

Therefore, when a wide roll is cut with a fixed blade, a rotary blade or a band knife, the cutting resistance sharply increases at the place where the blade enters the core of the plastic foam adhesive tape. It is difficult to avoid distorting or slipping, it is not possible to cut the cut surface into a right angle and a flat surface, and it is often a diagonal cut or a partially curved surface,
The cutting width was also inaccurate.

In particular, the method of simultaneously cutting a large number of wide rolls with a thin-blade vertical splitter is the most advantageous in terms of productivity and cost, but the above-mentioned problems must occur and the quality must be sacrificed. There wasn't.

The occurrence of blade bending and displacement due to a sharp increase in cutting resistance can be suppressed by increasing the rigidity and strength of the blade. Therefore, a method of using a blade having a sufficient wall thickness can be considered. However, when using a thick rotary blade, the thick blades must be coaxially arranged in a narrow width in order to cut multiple ribbon-shaped plastic foam adhesive tapes at the same time. It is practically difficult to reduce the length to 20 mm or less due to the restriction of the mounting structure. In addition, since the friction resistance when cutting the plastic foam adhesive tape is extremely larger than that of the thin blade, the heat generation is large and the plastic foam adhesive tape base material (hereinafter referred to as tape base material) is deformed or burnt. , Not practical. In particular, with a band knife, it is impossible to use a thick blade because the blade needs to be flexible. Further, even when cutting one by one with a thick rotary blade, there is a problem that it is difficult to obtain dimensional accuracy due to the thick wall.

The present invention has been made in view of the above problems, and can be manufactured with high productivity and low cost without restriction of tape width, and further has a vertical and flat cut surface. A plastic foam adhesive tape roll is provided.

[0011]

SUMMARY OF THE INVENTION The present invention relates to a plastic foam adhesive tape winding body having a plastic core adhesive tape wound around a winding core, wherein the material of the core is a plastic foam adhesive tape substrate cut. It is characterized by having a cutting resistance almost equal to the cutting resistance with respect to the blade.

[0012]

Operation: A wide plastic foam adhesive sheet is wound around a core for a predetermined length to produce a wide roll, a plurality of the wide rolls are placed on a movable table, and a predetermined tape is used by using a vertical splitter or the like. A plastic foam pressure-sensitive adhesive tape roll is manufactured by cutting the width of the roll together with the core.

In this case, when the cutting shifts from the plastic foam pressure-sensitive adhesive sheet to the winding core, the winding core has a cutting resistance almost equal to the cutting resistance of the cutting edge of the plastic foam pressure-sensitive adhesive tape base material. No sudden changes in resistance occur. As a result, the blade is not twisted or misaligned,
The wide roll is cut at a right angle and a flat cut surface.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a plastic foam adhesive tape roll R. This plastic foam adhesive tape roll R has a pressure-sensitive adhesive layer formed by applying a pressure-sensitive adhesive 3 on one surface of a tape base material 2 formed of a plastic foam, and a release layer formed by a release agent on the other surface. Four
The plastic foam pressure-sensitive adhesive tape T on which is formed is wound around the core 1 formed in the shape of a pipe by the same or the same plastic foam as the tape base material 2 so that the pressure-sensitive adhesive layer contacts the core 1. ing.

As the plastic foam adhesive tape T, a fiber, a non-woven fabric, or a plastic film may be attached to one side or both sides of the tape base material 2 in order to reinforce the tape base material 2 and increase its strength. Further, a primer layer may be provided between both surfaces of the tape base material 2 and the pressure-sensitive adhesive layer 3 in order to improve the adherence between the pressure-sensitive adhesive layer and the tape base material 2. Further, it may be wrapped with a release paper that covers the adhesive layer 4.

In order to manufacture the plastic foam adhesive tape roll R, the plastic foam adhesive sheet T is wound around the core 1 a few times to form a roll having a small diameter, and then the plastic foam adhesive is adhered. The small-diameter roll of the sheet T is placed on a rotary roll (not shown), and the rotary roll is rotated, so that the small-diameter roll is rotated by contact friction with the rotary roll, and the plastic foam adhesive sheet T is wound by a predetermined length to form a wide roll. To manufacture. Next, a plurality of the wide rolls are placed on a movable table, and the roll is cut into a predetermined tape width along with the winding core 1 using a vertical splitter.

In this case, since the core 1 is formed of the same or the same plastic foam as the tape base material 2, when the cutting is transferred from the plastic foam adhesive sheet T to the core 1, the cutting resistance of the cutting resistance is increased. No sudden fluctuations occur.
As a result, since the blade is not twisted or misaligned, it is possible to reliably manufacture the plastic foam adhesive tape roll R having a right-angled and flat cut surface.

The winding core 1 of this embodiment is a plastic foam adhesive tape roll R using a vertical splitter.
However, it is also possible to cut using a rotary round blade.

In this embodiment, the tape base material 2 is used.
Although the core 1 formed of the same or the same material as the above is illustrated, it may be formed of a material having a cutting resistance equal to or less than that of the tape base material 2. Further, a plastic film having a thickness of 100 μm or less, preferably 50 μm or less, which does not cause a sharp increase in cutting resistance,
Nonwoven fabric or paper can also be used.

For example, when a core made of a plastic film is used, a wide roll may be formed as shown in FIG. That is, a cylindrical plastic film 6 formed longer than the circumferential length of the winding shaft 5 is fitted onto the winding shaft 5 having a slit 5a formed in the axial direction, and the diameter of the winding shaft 5 is larger than the diameter of the winding shaft 5 from the slit 5a. After the plate member 7 having a slightly larger width is fitted to remove the looseness of the plastic film 6, the wide plastic foam adhesive sheet T cut into a predetermined tape length is wound to produce a wide roll. Then, the plate material 7 is slit 5a in the axial direction of the winding shaft 5.
After pulling out along the line, the wide roll may be pulled out from the winding shaft 5. At this time, the plastic foam adhesive sheet T
Even if has adhesiveness, the adhesive force only acts on the side edge of the plate material 7, and therefore does not hinder the removal of the plate material 7. Hereinafter, as described above, the wide roll may be placed on the movable table and cut along with the core of the plastic film 6 into a predetermined width by a vertical splitter or a rotary round blade.

Here, the tape base material 2 is generally a polyethylene foam, a soft vinyl chloride foam, a neoprene foam, or a composite product of these, and
As the core 1, a polyethylene foam having an apparent density of 0.2 g / cc or less or a polyethylene film having a wall thickness of 50 μm is suitable, but the material is not limited to such a material.

Further, in the case of a plastic film having a diameter of 100 μm or less, the winding core 1 is used by rolling it into a cylindrical shape. In the case of other than the plastic film, a pipe-shaped one is generally used, and a rod-shaped one in which the cylinder is clogged may be used. A circular outer shape is convenient, but a circular surface may be formed in a wavy shape or a cut may be provided depending on the application, and a shape other than the circular shape is free, and there is no restriction on the shape.

Further, by using a plastic foam formed in the shape of a rod having a small diameter for the winding core 1, it is possible to make a tape having an inner diameter smaller than that of a general paper core.

When a stretchable adhesive tape is wound in a roll shape, the shape of the tape is likely to lose its shape due to the tightening of the tape due to the tension when the tape is wound, but a soft plastic core is used. When a foam is used, the winding core absorbs the tension of the winding tightness as a secondary effect, and the shape collapse can be prevented.

[0026]

As described above, according to the present invention, in a plastic foam adhesive tape winding body in which a plastic foam adhesive tape is wound around a core, the material of the core is a plastic foam adhesive tape substrate. Since it is formed of a material having a cutting resistance almost equal to the cutting resistance of the cutting blade of No. 1, when cutting a wide roll to a predetermined width, a sharp increase in cutting resistance does not occur even when reaching the core from the plastic foam adhesive tape. In addition, it is possible to efficiently manufacture a plastic foam adhesive tape roll whose cut surface is a right angle and is flat.

[Brief description of drawings]

FIG. 1 is a front view showing a plastic foam adhesive tape roll of the present invention.

FIG. 2 is an explanatory view showing a process of winding the plastic foam adhesive tape of the present invention around a winding core.

FIG. 3 is a schematic view showing a method for manufacturing a conventional plastic foam adhesive tape roll.

FIG. 4 is a schematic view showing a method for manufacturing a conventional plastic foam adhesive tape roll.

FIG. 5 is a schematic view showing a method for manufacturing a conventional plastic foam adhesive tape roll.

[Explanation of symbols]

 1 winding core 2 tape base material 3 adhesive layer 4 release layer R plastic foam adhesive tape winding body T plastic foam adhesive tape (sheet)

Claims (1)

[Claims] 1. In a plastic foam adhesive tape roll having a plastic foam adhesive tape wound around a core, the material of the core is substantially equal to the cutting resistance of the plastic foam adhesive tape substrate against a cutting blade. A plastic foam adhesive tape wound body comprising a material having a cutting resistance.