JP2004042920A - Coreless roll-like flexible synthetic resin film - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coreless roll-like flexible synthetic resin film which dispenses with a core for keeping a cylindrical form to reduce a cost and prevent a portion to be wasted from occurring, is not necessary to put in a storage box when starting to use the film, and enables a film end to be drawn out from any part. <P>SOLUTION: A part to start rolling is not wound around the core but adhered over appropriate layers, thereby forming a rigid cylindrical part 2. A subsequent part is wound around the cylindrical part 2 without adhering, to successively form rolled layers 3 of the flexible film. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a coreless roll film made of a soft synthetic resin. The soft synthetic resin that is the material of the film in the present invention includes polyethylene, ethylene vinyl acetate copolymer resin, ethylene, α-olefin copolymer resin, polypropylene, polyvinyl chloride, polyvinylidene chloride, and the like. This includes not only smooth surfaces but also uneven surfaces provided with a large number of embosses.
[0002]
[Prior art]
As shown in FIG. 4, a conventional roll-shaped soft synthetic resin film (01) mainly for packaging is, in particular, in a household type, in order to maintain the cylindrical shape of the entire film winding layer (02). It requires a rigid paper core (03) in shape.
Therefore, it is disadvantageous in terms of manufacturing cost, and when the film (01) has been used, the paper core (03) becomes a waste together with the storage paper box (04) with a cutter. , Which is hard to ignore.
[0003]
However, if the paper core (03) is abolished, the shape of the film wrapping layer (02) will be lost, and it will be difficult to use it without waste until the end.
[0004]
Further, in the conventional roll-shaped flexible synthetic resin film (01), the tape-shaped leader (06) adhered to the winding end portion (05) after opening the lid of the storage paper box with cutter (04) before use. Is pulled by the toe, and if the roll-shaped soft synthetic resin film (01) is stored in such a position that the leader (06) is hidden behind the leader, the leader (06) is pulled out. Since it is not possible to do so, it is necessary to reload the film so that the leader (06) is in front.
[0005]
[Problems to be solved by the invention]
The present invention eliminates the need for a core for maintaining a cylindrical shape, reduces costs, and prevents the generation of a portion to be discarded.
In addition, the present invention eliminates the need to reload the roll-shaped soft synthetic resin film into the storage box when starting to use it, so that the edge of the film can be pulled out from anywhere, a coreless roll-shaped soft synthetic resin film. It is intended to provide.
[0006]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, in the present invention, the winding start portion is not wound around the core, but is bonded over appropriate layers to form a rigid cylindrical portion. Furthermore, by winding the subsequent portion without bonding, a flexible film winding layer is continuously formed.
In some cases, the film is made of an uneven shape having a large number of small embosses provided on the entire surface.
[0007]
In some cases, a leader having an appropriate length, for example, a length substantially round the film winding layer, is adhered to the end portion of the film at a plurality of points along the winding direction.
[0008]
It is preferred that the film be provided with cutting guide lines in the width direction for each average length consumed in one use.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As clearly shown in FIG. 1, in the coreless roll-shaped soft synthetic resin film (1) of the present invention, the film wrapping layer (2) is formed by appropriately wrapping the winding start portion on the inner peripheral side over an appropriate layer. It is composed of two continuous portions: a rigid cylindrical portion (3) bonded with an adhesive, and a flexible film layer (4) formed by winding without bonding the subsequent portion.
In FIG. 1, in order to emphasize the features of both parts, they are schematically drawn exaggeratedly.
[0010]
A detailed example is given below.
A flexible synthetic resin film (1) made of polyethylene, polyvinyl chloride, polyvinylidene chloride, or the like, having a thickness of about 10 to 20 microns, a width of about 1.5 m, and a length of about 30 m, is sequentially wound, and has an inner diameter of about 40 mm. A coreless roll-shaped flexible film shall be formed.
[0011]
Prior to winding, a soft and flexible adhesive is applied to the outer surface of the belt-shaped flexible synthetic resin film (1) over a range of at least 120 mm before the winding.
[0012]
The inner surface at the beginning of the belt-shaped soft synthetic resin film (1) is adhered to a diameter-reducible cylindrical core having a diameter of about 40 mm (not shown) with an appropriate adhesive, and then the soft synthetic resin film (1) is formed. Are wound while applying an appropriate tension in the axial direction.
[0013]
As a result, the winding start portion of the soft synthetic resin film (1) is bonded by an adhesive over one or more turns, and after a required time has elapsed, the bonding portion is stabilized and the rigid cylindrical portion is formed. (2) is formed.
Next, the non-adhered portion of the soft synthetic resin film (1) following the rigid cylindrical portion (2) is wound around the rigid cylindrical portion (2) while applying appropriate tension in the longitudinal direction, The soft film wrapping layer (3) is formed by polymerization.
[0014]
Then, the core is reduced in diameter, removed from the rigid cylindrical portion (2), and the rigid cylindrical portion (2) and the soft film winding layer (3) are cut at required portions in the width direction. To split.
[0015]
As a result, in the individually separated roll-shaped wrapping film, the rigid cylindrical portion (2) is in tight contact between the layers even after being pulled out of the winding core, as if a paper core was present. Since it is pseudo-solidified, the flexible film winding layer (3) subsequently wound thereon is also stably held.
[0016]
The band-shaped soft synthetic resin film (1) has perforations or grooves in the width direction at an average length used for one use, for example, every 30 cm before or simultaneously with the winding. It is desirable to insert a cutting guide line such as.
[0017]
Further, as shown in FIG. 2, a tape-shaped leader (5) made of paper or synthetic resin is provided on the outer surface of the winding end portion (4) of the soft synthetic resin film (1) at several places along the winding direction. It is desirable to lightly adhere (6) in the above.
[0018]
Although the length of the leader (5) is appropriate, it is desirable that the length of the leader (5) is at least one round of the flexible film winding layer (3), including the portion protruding from the winding end portion (4).
[0019]
FIG. 3 is a perspective view showing an unused state of the coreless roll-shaped soft synthetic resin film of the present invention.
In an unused state, the leader (5) is extremely lightly tied to the entire flexible film wrapping layer (3), and is stored in this state in the storage paper box with cutter (7). .
[0020]
In use, with the lid of the storage paper box with cutter (7) being opened, a finger is hooked on an arbitrary portion of the leader (6) and the leader (5) is pulled, whereby the start end (5) of the film is pulled out. .
[0021]
【The invention's effect】
According to the first aspect of the present invention, the winding start portion is formed in a rigid cylindrical shape by bonding over an appropriate number of layers, so that a conventional paper core is unnecessary, and It does not collapse or bend. Therefore, the cost can be reduced by eliminating the paper core, and the labor and cost associated with the processing of the unnecessary paper core are eliminated.
[0022]
According to the invention as set forth in claim 2, unlike the case of the smooth film, the films of the respective layers do not adhere to each other over the entire surface, and since there are minute gaps between the respective layers, it is easy to peel off, and when peeling off, Cutting is prevented.
[0023]
According to the third aspect of the present invention, a leader having an appropriate length, for example, a length that substantially makes a round around the film winding layer, is provided at the end of the film winding so that the film can be easily peeled off from the film winding layer. By bonding the film at several places along the winding direction, regardless of the orientation of the rolled film in the paper box, open the lid without reinserting it, and immediately open the leader with your finger. The film can be pulled out easily.
[0024]
According to the fourth aspect of the present invention, it is convenient to use a cutting guide line in the width direction for each fixed length, and it is not necessary to provide a cutter in the storage paper box as in the related art. Since it is eliminated, the cost and the labor and cost related to disposal can be reduced.
[Brief description of the drawings]
FIG. 1 is an end view showing one embodiment of a coreless roll-shaped soft synthetic resin film of the present invention.
FIG. 2 is a perspective view showing an example in which a leader is attached to the coreless roll-shaped soft synthetic resin film of the present invention.
FIG. 3 is a perspective view of the embodiment shown in FIG. 2 in an unused state.
FIG. 4 is a perspective view of a conventional roll-shaped soft synthetic resin film.
[Explanation of symbols]
(01) Roll-shaped soft synthetic resin film (02) Film wrapping layer (03) Paper core (04) Storage paper box with cutter (05) End of winding part (06) Leader (07) Leader (1) Soft synthetic resin film (2) ) Rigid cylindrical part (3) Soft film winding layer (4) End of winding (5) Leader (6) Adhesive part (7) Storage paper box with cutter

Claims (4)

By forming the rigid cylindrical portion by bonding the winding start portion over the layers without winding it around the core as appropriate, by winding the subsequent portion around the rigid cylindrical portion without bonding. And a coreless roll-shaped soft synthetic resin film, wherein a soft film winding layer is formed continuously. 2. The coreless roll-shaped flexible synthetic resin film according to claim 1, wherein the film is formed into a concavo-convex shape having a large number of small embosses provided on the entire surface. The coreless roll-shaped soft synthetic resin film according to claim 1 or 2, wherein a leader having an appropriate length is adhered to the end portion of the film at a plurality of positions along the winding direction. 4. The coreless roll-shaped flexible synthetic material according to claim 1, wherein a cutting guide line in the width direction is inserted into the film for each average length consumed in one use. Resin film.

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