JP3030256U - Coreless roll-shaped soft synthetic resin film - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a soft synthetic resin film for packaging in a roll without a core. SOLUTION: The winding start portion of the film winding layer is
By forming the high-tension portion 3 to which a relatively large tension is applied over an appropriate number of layers without winding it around the core, the high-tension portion 3 is formed into a rigid cylindrical shape, and the portion following the high-tension portion 3 is
The low tension portion 4 is wound with a relatively small tension.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a roll-shaped packaging film made of a soft synthetic resin. The soft synthetic resin, which is the material for the film in this study, is polyethylene, ethylene vinyl acetate copolymer resin, ethylene, α-olefin copolymer resin, polypropylene, polyvinyl chloride, polyvinylidene chloride, and the like. Is included.

[0002]

[Prior art]

 As shown in FIG. 4, the conventional roll-shaped soft synthetic resin film (01), which is mainly used for packaging, in order to maintain the cylindrical shape of the film winding layer (02) as a whole, especially in the household type, Need a rigid cylindrical paper core (03). Therefore, it is disadvantageous in terms of manufacturing cost, and when the film is used up, the paper core (03) becomes a waste together with the storage paper box (04) with a cutter, and the labor and cost for its disposal and disposal are also ignored. It is difficult to do.

However, when the paper core (03) is abolished, the shape of the film winding layer (02) is likely to collapse, and it is difficult to use it smoothly without waste until the end.

Further, in the conventional roll-shaped soft synthetic resin film (01), in use, after opening the lid of the storage paper box with a cutter (04), the tape adhered to the winding end portion (05). The leader (06) is pulled up by pulling it up with the tip of the toe, but at this time, if the roll-shaped soft synthetic resin film (01) is stored with the leader (06) hidden behind. , The leader (06) cannot be pulled out, so it is necessary to insert the film again so that the leader (06) is in the front.

[0005]

[Problems to be solved by the device]

 The present invention eliminates the need for a core to maintain the cylindrical shape, reduces costs, and eliminates the need to re-insert the roll-shaped soft synthetic resin film into the storage box at the beginning of use, and the edge of the film can be removed from anywhere. An object of the present invention is to provide a coreless roll-shaped soft synthetic resin film which can be pulled out.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, in the present invention, the winding start portion is a high tension portion in which a relatively large tension is applied over an appropriate layer without being wound around the core, so that rigidity is improved. It is characterized in that it is formed into a cylindrical shape, and the portion following the high tension portion is a film winding layer which is a low tension portion wound with a relatively small tension.

At this time, a leader having an appropriate length, for example, a length that substantially makes one turn around the film winding layer, may be attached to the winding end portion of the film at a plurality of positions along the winding direction.

It is preferable that the film be provided with cutting line extension lines in the width direction for each average length that is spent for one use.

[0009]

[Embodiment of device]

 Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, in the coreless roll-shaped soft synthetic resin film (1) of the present invention, the film winding layer (2) has a high tension portion (3) which is a winding start portion on the inner peripheral side. And a low-tension portion (4) that follows it. In FIG. 1, in order to highlight the characteristics of both parts, they are exaggerated and schematically drawn.

More specifically, by giving a concrete example, a band-like soft synthetic material made of polyethylene, polyvinyl chloride, polyvinylidene chloride, or the like, having a thickness of about 10 to 20 μm, a width of about 1.5 m, and a length of about 30 m. The resin film (1) is fastened at its starting end to a core whose diameter can be expanded and contracted as described in, for example, Japanese Utility Model Laid-Open No. 4-31753, and the film (1) is subjected to strong longitudinal tension (eg, 30 kg). Wrap this around the core while hanging.

The strip-shaped soft synthetic resin film (1) has perforations or dents in the width direction at an average length, for example, every 30 cm, which is consumed in one use before or at the same time as the winding. It is desirable to insert cutting guide lines such as grooves.

When the winding thickness of the film (1) is about 0.5 mm, the tension is gradually reduced so that the tension becomes about 15 kg at the end of winding the film (1).

When the winding is completed, the tension is removed and the film winding layer (2) is left for a while to wait for stabilization of the film winding layer (2), and then the diameter of the winding core is reduced to remove the film winding layer (2). ) Is cut at a required position in the width direction and divided.

As a result, in the individually separated roll-shaped packaging film (1), the high-strength portion (3) having relatively high rigidity has a paper core even after being removed from the winding core. As described above, since the layers are closely contacted and pseudo solidified, the low tension portion (4) wound on the subsequent layer is also stably held.

FIG. 2 shows a tape-like leader (6) made of paper or synthetic resin on the outer surface of the winding end portion (5) of the coreless soft synthetic resin film (1) of the present invention shown in FIG. FIG. 7 is a development view showing a state in which light adhesion (7) is made at several points along the winding direction.

Although the length of the leader (6) is appropriate, it is necessary to add at least one portion projecting from the winding end portion (5) of the film and at least to make a round of the film winding layer (2). desirable.

FIG. 3 is a perspective view showing an unused state of the coreless soft synthetic resin film 1 of the present invention. In the unused state, the leader (6) binds the entire film winding layer (2) very lightly and is stored in the cutter-containing storage paper box (9) in this state.

In use, with the lid of the storage paper box with a cutter (8) open, hook the finger on any position of the leader (6) and pull the leader (6) to start the film (5). Is withdrawn.

[0019]

[Effect of device]

 According to the present invention, the following effects can be obtained. (a) Since the winding start part is formed into a high-strength, rigid cylindrical shape over an appropriate number of layers, the shape collapses or folds even though the conventional paper core is omitted. It doesn't bend. Therefore, since the paper core is eliminated, the cost can be reduced, and the labor and cost associated with the processing of the paper core that is no longer needed is unnecessary.

(B) From the high tension part to the winding end part, since it is a low tension part, it can be easily peeled off from the beginning of use.

(C) In order that the film can be easily peeled off from the film winding layer, a leader having an appropriate length, for example, a length substantially around the film winding layer, is provided at the end of the film winding direction. By adhering it at multiple points along the edge, no matter how the roll film is stored in the paper box, opening the lid without re-inserting it makes it easy for the reader to use the finger immediately. The film can be pulled out easily by pulling it (invention of claim 2).

(D) It is convenient to use if a cutting guide line in the width direction is provided for each fixed length, and it is not necessary to provide a cutter on the paper box as in the conventional case. Thus, it is possible to reduce the cost and the labor and cost related to the disposal treatment (invention of claim 3).

[Brief description of drawings]

FIG. 1 is an end view showing an embodiment of a coreless soft flexible 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 soft synthetic resin film (02) Film winding layer (03) Paper core (04) Storage paper box with cutter (05) Winding end part (06) Leader (07) Leader (1) Roll soft synthetic resin film (2) Film winding layer (3) High tension part (4) Low tension part (5) Winding end part (6) Leader (7) Adhesion (location) (8) Storage paper box with cutter

Claims (3)

[Scope of utility model registration request] Claim: What is claimed is: 1. A high-tensile portion having a relatively large tension applied to a suitable layer at the beginning of winding without winding the core to form a rigid cylindrical shape, and this high-tensile portion. A coreless roll-shaped soft synthetic resin film comprising a film winding layer which is a low tension portion in which a portion following the portion is wound with a relatively small tension. 2. The coreless roll-shaped soft synthetic resin film according to claim 1, wherein a leader having an appropriate length is adhered to a winding end portion of the film at a plurality of positions along the winding direction. 3. The coreless roll-shaped soft material according to claim 1 or 2, wherein the film is provided with a cutting guide line in the width direction for each average length consumed in one use. Synthetic resin film.