JP2002293370A - Shrink package of roving roll - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shrink package of a roving roll wherein the package is shrink-packaged using a heat shrinkable film, there is no collapsing of a packaging film until a roving is completely drawn and there is no failure in drawing the roving, a packaging cost is low, and an amount of wastes is small. SOLUTION: The package 10 comprises the roving roll 1 which is shrink- packaged with a polyolefin-based heat shrinkable film 2. A belt-like reinforcing material 4 extending in a parallel direction to a core of the roll 1 is provided while coupled with the film 2 on an external and/or internal surface of the film 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package obtained by shrink-wrapping a roving roll with a heat-shrinkable film, and more particularly to a roving roll having no problem of collapse of the packaging film at the end of use. The present invention relates to a shrink wrapping body that can smoothly pull out to the end.

[0002]

2. Description of the Related Art A glass roving is a typical processed product of a glass strand obtained by attaching a sizing agent at the time of spinning a glass single fiber (filament) and assembling the glass strand in parallel with the fiber length direction. The glass roving is one in which a predetermined number of glass strands are aligned without being twisted, and the number of glass single fibers constituting the roving ranges from about 1,000 to about tens of thousands. Since glass roving does not twist, the strength in the length direction is large,
Suitable for manufacturing long objects such as rods and pipes. It is also used in the filament winding method (FW method). The wound body of the roving is widely used for supplying chopped strands because it is easily mounted on a continuous forming apparatus.

[0003] The rolled glass roving is shown in Figs.
As shown in (d), a bag-shaped or tubular heat-shrinkable film 2 is provided to prevent the wound body 1 from being damaged or collapsed.
3 (c), and heat-treated to be shipped as a shrink wrap 3 (FIG. 3 (d)). In FIG. 3B, a two-dot chain line indicates a heat seal portion.

The heat shrinkable film 2 for shrink wrapping
However, since a chlorine-based gas is generated during incineration, a polyolefin-based heat-shrinkable film containing no chlorine has been used.

[0005] The packaging film of this shrink package is
At the time of shrink packaging, the heat-shrinkable film bites into the outermost layer of the glass roving roll, and irregularities are formed on the heat-shrinkable film in accordance with the irregularities of the outermost layer of the glass roving roll, and the irregularities support the glass roving.

[0006] The shrink wrapping body 3 of glass roving packaged in this manner is used so that the roving is pulled out from the inner peripheral side of the wound body. The packaging film cannot maintain its shape and the film collapses. And
As a result, the traversing of the wound roving body is broken, and the roving is easily pulled out in a tangled state.

In other words, immediately before the glass roving is almost completely pulled out from the rolled glass roving body, the package is in a hollow state in which several rolled glass roving layers are left on the inner surface of the packaging film. ing. And the glass roving winding layer in the packaging film is 1 to
When the number of layers becomes about two, the rolled glass roving tends to collapse toward the inner peripheral side, and the collapse cannot be supported by the packaging film, and the packaging film collapses together with the roll. When the packaging film collapses, the glass roving cannot be fed smoothly, and the glass roving can be pulled up in a tangled and tangled state. Glass rovings pulled out while tangled may have an adverse effect on product quality, such as being present as a roving mass in the final product such as FRP. become unable.

[0008] Such a problem tends to be remarkable particularly in a glass roving wound body having a large winding diameter and a large height, and a glass roving wound with a large number.

The heat-shrinkable polyolefin film is softer and less self-supporting than the heat-shrinkable polyvinyl chloride film.

Japanese Patent Publication No. Hei 6-88620 discloses that a film-like material is interposed between the outer peripheral surface of a rolled glass roving and a heat shrinkable film in order to prevent the roving from collapsing even immediately before the completion of the roving withdrawal. It is described that the film is lightly adhered to a roll. The film-like material of this shrink wrapper is separate from the wrapping film. According to the publication,
Since the roving is adhered to the film, the roving does not collapse until the drawer is completed.

[0011]

SUMMARY OF THE INVENTION
In the shrink wrapper described in Japanese Patent Publication No. 20, since the film-like material is separate from the packaging film, the film-like material is collapsed so as to be dragged by the roving just before the completion of the withdrawal of the roving. .

Since the rigidity of the film itself is extremely low (the waist is weak), the film itself cannot support the roving which is about to collapse. In order to prevent the roving from collapsing, it is conceivable to increase the thickness remarkably or to cover the entire outer periphery of the roving roll with a thick film material, but the use amount of the film material increases. In addition, the packaging cost is high, and the amount of waste after using the shrink package increases.

The present invention solves the above-mentioned conventional problems and provides a package shrink-wrapped using a heat-shrinkable film, which is free from collapse of the packaging film and defective pulling of the roving until the roving withdrawal is completed. An object of the present invention is to provide a roving roll shrink package having a low packaging cost and a small amount of waste.

[0014]

According to the present invention, there is provided a shrink package of a roving roll, wherein the roving roll is shrink-wrapped with a heat-shrinkable film, wherein one of an outer surface and an inner surface of the heat-shrinkable film is provided. Alternatively, a band-shaped reinforcing member extending in a direction parallel to the axis of the roving winding body is provided on both sides, and at least a part of the reinforcing member is bonded to the heat-shrinkable film. And

In the shrink wrapping body of the present invention, the belt-like reinforcing member extending in the direction parallel to the axis of the roving winding body includes:
Since it is provided in combination with the heat-shrinkable film, even after the use of the roving is finished, the reinforcing material remains in the form of a column with the packaging film, and reinforces the self-sufficiency of the packaging film. The self-supporting properties of the heat-shrinkable film are enhanced by such a reinforcing effect of the reinforcing material, and the collapse of the film at the end of use is prevented. Since this reinforcing material is bonded to the packaging film, it is not necessary to increase the thickness excessively, and it is band-shaped, and it is not necessary to cover the entire outer peripheral surface of the roving roll. The increase in packaging cost and the amount of waste after use due to the provision of the material can be suppressed.

In the present invention, the heat shrinkable film is preferably a polyolefin heat shrinkable film. Further, it is preferable that the belt-like reinforcing material is provided so as to extend from the side peripheral surface of the roving winding body to both end surfaces of the roving winding body. The band-shaped reinforcing material is preferably a polyolefin film, and the width of the band-shaped reinforcing material is 70 to 100 mm and 2 mm.
It is preferable to provide at least two.

In the present invention, the reinforcing material may be provided on the outer surface or the inner surface of the heat-shrinkable film. However, the reinforcing material is covered with the heat-shrinkable film, and is used for transporting a shrink package. Reinforcement material is not caught by surrounding members during handling, and the reinforcement material is integrated with the heat-shrinkable film, and it also has the function of supporting the roving by bonding it to the roving, so it is reinforced. The material is preferably provided on the inner surface side of the heat shrinkable film.

It is preferable that the belt-like reinforcing material and the heat-shrinkable film are connected as follows. The belt-shaped reinforcing material and the heat-shrinkable film are fused by heat treatment during shrink packaging. An adhesive film is attached to the belt-like reinforcing material, and the adhesive film and the heat-shrinkable film are fused by heat treatment during shrink packaging.

The present invention is particularly suitable as a shrink wrapping for rolled glass rovings, but is not limited thereto.

[0020]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a shrink wrapping body for a roving roll according to the present invention.

FIG. 1 is a perspective view showing an embodiment of a shrink package of a glass roving roll according to the present invention, and FIG. 2 is a perspective view showing an example of a method of manufacturing the shrink package.

A shrink wrapping body 10 shown in FIG. 1 is a strip-shaped reinforcing material (hereinafter referred to as a “reinforcing tape”) at least part of which is bonded to a heat-shrinkable film 2 between a glass roving roll 1 and a heat-shrinkable film 2. 4) is provided.

As the reinforcing tape 4, a polyolefin resin tape such as polyethylene is preferable, and its thickness is preferably about 20 to 500 μm. If the thickness of the reinforcing tape 4 is less than 20 μm, a sufficient reinforcing effect cannot be obtained, and even if the thickness exceeds 500 μm, there is no significant difference in the reinforcing effect, the material cost is high, and the packaging workability at the time of shrink packaging is deteriorated. Is not preferred.

If the width of the reinforcing tape 4 is too small, a sufficient reinforcing effect cannot be obtained, and if the width is too large, the material cost increases. Therefore, the width of the reinforcing tape 4 varies depending on the size of the rolling wound body and the number of the reinforcing tapes 4. The width of the reinforcing tape is 70-10
It is preferable to set it to about 0 mm.

In FIG. 1, four reinforcing tapes 4 are provided at equal intervals. However, in many cases, a single reinforcing tape cannot provide a sufficient reinforcing effect. It is preferable to provide a plurality of the above-mentioned wires at equal intervals.
If the number of reinforcing tapes is excessively large, it is not possible to achieve the object of the present invention of obtaining the effect of preventing the film from collapsing while suppressing the cost of the packaging material. Therefore, two to four reinforcing tapes are provided at equal intervals. , {The width of the reinforcing tape × the number of reinforcing tapes} is 10 to 2 times the outer peripheral length of the roving winding body 1.
5%, that is, 10 to 25 of the outer peripheral surface of the roving roll 1
% Is preferably provided to such an extent as to be covered by the reinforcing tape.

The reinforcing tape 4 is preferably provided so as to extend from the side peripheral surface of the roving winding body 1 to both end surfaces in view of the reinforcing effect. That is, when the reinforcing tape 4 is provided so as to exist only on the side peripheral surface of the roving winding body 1, the strength of the packaging film at the boundary between the side peripheral surface of the shrink wrapping body 10 and the bottom surface or the top surface is reduced. It becomes weak, and the film bends at this portion, and the film shape cannot be maintained. In this case, the extension length of the extension piece that extends to the end face side of the roving winding body 1 of the reinforcing tape 4 is:
It is preferable that the thickness is about １ ／ to ／ of the thickness of the roving roll 1 (= (outer diameter−inner diameter)） 2).

As shown in FIG. 1, when the reinforcing tape 4 is provided between the roving roll 1 and the heat-shrinkable film 2, it is necessary to fix the reinforcing tape 4 to the roving roll 1 in the packaging operation. Become. In this case, when the glue is applied and the reinforcing tape 4 is adhered to the roving roll 1, the glue may soak into the roving and affect the quality. It is preferable to use an adhesive tape coated with glue and fix the adhesive tape to the roving roll 1. In this case, if the adhesive force of the adhesive tape is too weak, the fixing of the reinforcing tape 4 becomes insufficient, and the reinforcing tape 4 may fall off from the roving winding body 1 at the time of subsequent shrink packaging, and conversely, the adhesive force is strong. If it is too long, the roving of the outermost layer of the roving winding body 1 is stuck to the reinforcing tape 4 so that the roving cannot be pulled out smoothly and fluffing is likely to occur. Therefore, it is preferable that the adhesive strength is appropriately set within a range that does not impair the quality of the roving and the workability of drawing and packing. In a normal case, it is preferable to use a glass roving roll 1 having a width of about 70 to 100 g / 25 mm.

The shrink wrapping body 10 shown in FIG. 1 is obtained by attaching a reinforcing tape 4 to the rolled glass roving body 1, covering the heat shrinkable film 2 with the heat shrink film 2, and performing heat treatment for shrink wrapping. It is preferable to manufacture by combining with the shrink film 2. In this case, if the reinforcing tape 4 and the heat-shrinkable film 2 can be heat-fused, for example, if they are made of the same material, simply the glass roving roll 1
After attaching the reinforcing tape 4 to the heat-shrinkable film 2, the heat-shrinkable film 2 is covered and shrink-wrapped according to a conventional method, so that the reinforcing tape 4 and the heat-shrinkable film 2 are fused and integrated with each other by heat at the time of shrink-wrapping. Can be.

When the reinforcing tape 4 and the heat-shrinkable film 2 are separate materials and do not fuse with each other by heat treatment during shrink wrapping, an adhesive film that can be heat-fused with the heat-shrinkable film 2 is attached to the reinforcing tape 4. It is preferable that the reinforcing tape 4 and the heat-shrinkable film 2 are bonded together by pasting and heat-sealing the adhesive film and the heat-shrinkable film.

In this case, it is preferable to perform shrink packaging by the method shown in FIG. That is, first, the reinforcing tape 4 is attached to a predetermined position on the outer peripheral surface of the roving winding body 1 wound by the winding spindle 5. Roving roll 1
By attaching the reinforcing tape 4 to the roving winding body 1 in a state where the reinforcing tape 4 is wound around the winding spindle 5, the reinforcing tape 4 can be easily attached so as to wrap around both end surfaces of the roving winding body 1. On the other hand, after removing the roving winding body 1 from the spindle 5, it is not easy to make the reinforcing tape 4 wrap around the lower end surface of the roving winding body 1.

After the reinforcing tape 4 has been attached to the roving roll 1, the adhesive film 6 is attached to the reinforcing tape 4 with a double-sided tape 7 or the like. As the adhesive film 6, a film obtained by cutting a heat shrink film used for shrink wrapping into small pieces can be used, and the size may be such that it covers the entire surface of the reinforcing tape 4. In order to reduce the packaging material, the minimum required number of small pieces is sufficient. For example, as shown in FIG. 2, each side has a small length of about 〜 to の of the height of the roving roll 1. It is preferable to attach the flaky adhesive film 6 to two or three or more places.

After the adhesive film 6 is adhered to the reinforcing tape 4 in this manner, the heat-shrinkable film 2 is put on the reinforcing tape 4 and heat-treated according to a conventional method, followed by shrink packaging.

In the present invention, the heat-shrinkable film 2 to be used is preferably a polyolefin-based heat-shrinkable film, such as a polyethylene film or a polypropylene film, and the film itself is excellent in shape retention (hardness). Therefore, a polypropylene-based heat-shrinkable film is preferable.

If the thickness of the heat-shrinkable film 2 is too thin, the strength and autonomy are insufficient, and if it is too thick, the material cost is high. Therefore, the thickness of the heat-shrinkable film 2 is appropriately determined in consideration of the strength and cost. However, in the present invention, the heat shrinkable film 2
Is reinforced with the reinforcing tape 4 and can prevent the film from collapsing even if it is relatively thin.
A thickness of about 40 μm is sufficient.

The heat treatment conditions for shrink wrapping are usually 1
The heat-shrinkable film 2 is preferably a heat-shrinkable film that shrinks by 20 to 50% by such a heat treatment, although the temperature is about 1 to 4 hours at 00 to 120 ° C. This shrinkage is 2
If it is less than 0%, the shrinkage is insufficient, the heat-shrinkable film does not sufficiently penetrate into the outermost layer of the roving, and the holding power of the glass roving is insufficient. The shrinkage rate is 50%
If it exceeds, the film may shrink too much, become smaller than the size of the roving roll, or may be torn from where it was processed into a bag. Also,
To prevent this, making the size before shrinking too large undesirably leads to an increase in material cost.

FIGS. 1 and 2 show a shrink wrapping body in which a reinforcing tape 4 is provided between the roving roll 1 and the heat-shrinkable film 2. In the present invention, the reinforcing tape 4 is formed on the outer surface of the heat-shrinkable film 2. May be provided on the side surface. In this case, the reinforcing tape 4 is adhered to the heat-shrinkable film 2 on the outer surface of the shrink-wrapped body 10 shrink-wrapped with the heat-shrinkable film 2 so as to extend from the side peripheral surface of the shrink-wrapped body 10 to both end faces. Just attach it. Further, a heat-shrinkable film in which a reinforcing tape is pasted to a predetermined location may be used. Further, by attaching a reinforcing tape having strong adhesiveness to the shrink wrapped body after the shrink wrapping with the heat shrinkable film 2, the reinforcing tape can be easily attached.

Also in these cases, the same size and material as described above can be used as the reinforcing tape.

The shrink package of the present invention is not limited to the shrink package of the glass roving roll 1, but can be suitably applied as a shrink package of a roving roll of various organic or inorganic fibers. In particular, a large effect can be obtained in a roving roll having a large diameter of 2310 to 9600 g / km, which has a large problem of film collapse.

[0039]

The present invention will be described more specifically below with reference to examples and comparative examples.

Example 1 A reinforcing tape was attached to a roll of glass roving having a diameter of 475 mm, a height of 500 mm, 100 kg / 1 roll and 4800 g / km by a method shown in FIG. 2, and a heat-shrinkable film was formed using an adhesive film. By bonding, 100 shrink packages of the present invention were manufactured.

The following materials were used as the heat-shrinkable film, the reinforcing tape, and the adhesive film. Four reinforcing tapes were attached at equal intervals to the glass roving roll, and two adhesive films were attached to each reinforcing tape. After sticking with a double-sided tape, a heat-shrinkable film was covered and heat-treated at 100 ° C. for 4 hours, followed by shrink packaging. [Heat-shrinkable film] Heat-shrinkable polypropylene film “Fancy Wrap OL type” manufactured by Gunze Co., Ltd. Thickness: 30 μm Shrinkage (120 ° C. × 20 seconds): 25 to 45% Dimensions: 790 mm × 890 mm Bag-shaped [Reinforcing tape] Polyurethane surface protection tape "E-212" manufactured by Sumilon Co., Ltd. Thickness: 65 μm Width: 80 mm Adhesive force of the slope: 90 g / 25 mm width
Cut into corners.

The reinforcing tape wrapped around the both sides from the side peripheral surface of the rolled glass roving body and was 7 cm each.
It was attached to extend. Further, the heat shrinkage rate of the heat shrinkable film due to the heat treatment at the time of shrink wrapping is 45%. By this heat treatment, the adhesive tape adhered by the double-sided tape is fused with the heat shrinkable film by the heat treatment. Combined with shrink film.

When the glass rovings were unwound from the inside of the 100 shrink wrappers manufactured and used for actual use, all shrink wrappers lost their film shape during use or entangled the glass rovings. It was possible to smoothly and smoothly feed the glass roving to the end without using it.

Comparative Example 1 A shrink package was produced in the same manner as in Example 1 except that only the heat-shrinkable film was shrink-wrapped without using a reinforcing tape and an adhesive film. In the same way, when the usage status was examined, 30 out of 100 shrink wrappers were
The shape of the film collapsed during use, and it was not possible to draw out the glass roving.

Comparative Example 2 A shrink-wrapped body was manufactured in the same manner as in Example 1, except that the reinforcing tape was attached to the rolled glass roving without using an adhesive film, and then shrink-wrapped with a heat-shrinkable film. Then, when the use condition of the obtained shrink package was similarly examined, even if the reinforcing tape was provided, because this was not bonded to the heat-shrinkable film, 10 out of 100 shrink packages were,
The shape of the film collapsed during use, and it was not possible to draw out the glass roving.

[0046]

As described above in detail, according to the shrink wrapping of the roving roll of the present invention, the wrapping film is not collapsed and the roving is not pulled out until the roving is pulled out, and the roving ends. Provided is a shrink package excellent in handleability, which can be unwound as a single roving without causing any tangling, and has a low packaging cost and a small amount of waste.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a shrink package of a roving roll according to the present invention.

FIG. 2 is a perspective view illustrating a method for manufacturing a shrink package of a roving roll according to the present invention.

FIG. 3A is a perspective view of a rolled glass roving body,
(B) is a front view of the heat-shrinkable film, and (c) and (d) are perspective views illustrating the procedure of shrink packaging.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rolled glass roving body 2 Heat shrink film 3 Shrink package 4 Reinforcement tape 5 Winding spindle 6 Adhesive film 7 Double-sided tape 10 Shrink package

Continued on front page F term (reference) 3E067 AA16 AB99 AC01 BA12A BB16A BC03A CA01 EC23 EC26 EC27 EE38 EE59 FA02 FB01 FC03 3E068 AA24 AB03 AB09 AC01 CC23 CD05 CE05 DD20 DE13 EE09 EE32

Claims (8)

[Claims] 1. A package obtained by shrink-wrapping a roving roll with a heat-shrinkable film, wherein the package is provided on one or both of an outer surface and an inner surface of the heat-shrinkable film in a direction parallel to the axis of the roving roll. A shrink wrapping body for a roving roll, wherein an existing strip-shaped reinforcing material is provided, and at least a part of the reinforcing material is bonded to the heat-shrinkable film. 2. The roving wound body according to claim 1, wherein the belt-shaped reinforcing material is provided so as to extend from the side peripheral surface of the roving wound body to both end faces of the roving wound body. Shrink packaging. 3. The shrink-wrapped roving roll according to claim 1, wherein the belt-shaped reinforcing material is made of a polyolefin-based film. 4. The shrink-wrapped roving roll according to claim 1, wherein the heat-shrinkable film is a polyolefin-based heat-shrinkable film. 5. The roving roll according to claim 1, wherein the strip-shaped reinforcing material and the heat-shrinkable film are fused by heat treatment at the time of shrink packaging. Shrink packaging. 6. The adhesive film according to claim 1, wherein an adhesive film is attached to the belt-shaped reinforcing material, and the adhesive film and the heat-shrinkable film are subjected to heat treatment during shrink packaging. A shrink wrapping of a roving roll, which is characterized by being fused. 7. The roving according to claim 1, wherein the width of the band-shaped reinforcing member is 70 to 100 mm, and at least two band-shaped reinforcing members are provided. Rolled shrink wrap. 8. The shrink wrapping of a roving roll according to claim 1, which is a shrink wrap of a roll of glass roving.