JPH09226826A - Non-core rolling flexible synthetic resin film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obviate the need for a core for maintaining a cylindrical shape by forming an initially rolled part into a rigid cylinder as a high tension part with relatively large tensile force applied across appropriate layers and making a part subsequent to the initially rolled part as a low tension part which is rolled with relatively small tensile strength. SOLUTION: An initial end of a belt-like flexible synthetic resin film 1 as thick as 10 to 20 microns is fixed to a roll core, and the film is wound around the core while lengthwise strong tension is applied to the belt-like flexible synthetic resin film 1. When a rolled thickness of the film 1 reaches approximately 0.5m, the tension is gradually decreased. After winding is finished, the film 1 is left for a while to wait for a film rolled layer 2 to be stabilized, and the roll core is removed. As a result, in a high tension part 3 with rigidity on an inner peripheral side relatively large, respective layers are tightly and falsely fixed as if a paper core existed after it is removed from the core, and a low tension part 4 subsequently rolled thereon is stably held.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a roll-shaped packaging film made of a soft synthetic resin. The soft synthetic resin as the material of the film in the present invention is polyethylene, ethylene-vinyl acetate copolymer resin, ethylene, α
Includes olefin copolymers, polypropylene, polyvinyl chloride, polyvinylidene chloride, and the like.

[0002]

2. Description of the Related Art As shown in FIG. 4, a conventional roll-shaped soft synthetic resin film (01) for packaging mainly maintains the cylindrical shape of the whole film wrapping layer (02) especially in a household type. To do this, a cylindrical hard paper core (03) is required. Therefore, it is disadvantageous in terms of manufacturing cost, and when the film is used, the paper core (03) becomes waste together with the storage paper box (04) with a cutter, ignoring the labor and cost for disposal and disposal. It is difficult.

[0003] However, if the paper core (03) is abolished, the shape of the film winding layer (02) is liable to collapse, and it is difficult to use it without waste until the end.

Further, in the conventional roll-shaped flexible synthetic resin film (01), a tape-shaped leader adhered to a winding end portion (05) after opening a lid of a storage paper box with a cutter (04) before use. (06) is pulled up by raising the toe, but if this is the case, roll-shaped soft synthetic resin film
If (01) is stored in such a position that the leader (06) is hidden behind, the leader (06) cannot be pulled out, so it is necessary to reload the film so that the leader (06) comes to the front. Get out.

[0005]

SUMMARY OF THE INVENTION The present invention eliminates the need for a core for maintaining a cylindrical shape, reduces cost,
In addition, it is an object of the present invention to provide a coreless roll-shaped soft synthetic resin film which eliminates the need to re-insert the roll-shaped soft synthetic resin film into a storage box at the start of use and allows the end portion of the film to be pulled out from anywhere. And

[0006]

In order to achieve the above-mentioned object, according to the present invention, the winding start portion is formed by applying a relatively large tension to an appropriate layer without winding it around a core. In this case, the film winding layer is formed into a rigid cylindrical shape, and the portion following the high tension portion is formed of a film winding layer which is a low tension portion wound with a relatively small tension.

[0007] At this time, a leader having an appropriate length, for example, a length substantially rounding the film winding layer, may be bonded to the end portion of the film at a plurality of locations along the winding direction.

[0008] It is preferred that the film is provided with a cutting guide line in the width direction for each average length consumed in one use.

[0009]

Embodiments of the present invention will be described below 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 winding layer (2) includes a high tension portion (3) which is a winding start portion on the inner peripheral side, It consists of two continuous parts with a low tension part (4) following it. In FIG. 1, the two parts are exaggerated and schematically drawn to emphasize the features of the two parts.

More specifically, a specific example will be described. The thickness is about 10 to 20 microns, about 1.5 m in width and about 1.5 m in length, made of polyethylene, polyvinyl chloride, polyvinylidene chloride, or the like.
The starting end of the 30 m-shaped soft synthetic resin film (1) is fixed to a core capable of expanding and contracting as described in, for example, Japanese Utility Model Application Laid-Open No. 4-31753, and the film (1) is strong in the longitudinal direction. This is wound around a core while applying tension (for example, 30 kg).

Prior to or simultaneously with the winding, the belt-shaped flexible synthetic resin film (1) has perforations or recesses in the width direction at an average length consumed per use, for example, every 30 cm. It is desirable to insert a cutting guide line such as a groove.

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

When the winding is completed, the tension is removed and
Leave it for a while, wait for the film winding layer (2) to stabilize, then reduce the diameter of the core, remove it, and cut the film winding layer (2) at a required location in the width direction. To divide.

As a result, in the individually separated roll-shaped wrapping film (1), the high tension portion (3) having relatively high rigidity can be used as if the paper core exists even after being pulled out from the core. As described above, the respective layers come into close contact with each other and solidify in a pseudo manner, so that the low tension portion (4) subsequently wound thereon is also stably held.

FIG. 2 shows an outer surface of a winding end portion (5) of the coreless roll-shaped soft synthetic resin film (1) of the present invention shown in FIG.
FIG. 7 is a development view showing a state in which a tape-shaped leader (6) made of paper or synthetic resin is lightly bonded (7) at several places along the winding direction.

Although the length of the leader (6) is appropriate, it is preferable that the length of the leader (6) is at least about one round of the film winding layer (2), including the portion protruding from the winding end portion (5). .

FIG. 3 is a perspective view showing an unused state of the coreless roll-shaped soft synthetic resin film (1) of the present invention. When not in use, the leader (6) is very lightly tied to the entire film winding layer (2), and is stored in this state in the storage paper box (9) with a cutter.

In use, a storage paper box with a cutter
With the lid of (8) being opened, a finger is hooked on an arbitrary portion of the leader (6) and the leader (6) is pulled, whereby the starting end (5) of the film is pulled out.

[0019]

According to the present invention, the following effects can be obtained. (a) Since the winding start portion is formed in a high-strength rigid cylindrical shape over an appropriate number of layers, the shape is broken or folded even though the paper core as in the conventional case is omitted. It won't bend. Therefore, the cost can be reduced because the paper core is eliminated, and the labor and cost associated with the processing of the paper core that is no longer required are eliminated.

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

(C) In order to easily peel the film from the film winding layer, 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. No matter what direction the roll-shaped film is stored in the paper box, open the lid and immediately pull the leader easily with your finger, regardless of the orientation of the rolled film in the paper box. The film can be easily pulled out (the invention of claim 2).

(D) 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, as in the conventional case. It is possible to reduce the cost and labor and cost relating to the disposal process (the invention of claim 3).

[Brief description of drawings]

FIG. 1 is an end view showing one embodiment of a coreless 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 (06) Leader (07) Leader (1) Roll-shaped soft synthetic resin film (2) Film wrapping layer (3) High tension part (4) Low tension part (5) End of winding part (6) Leader (7) Adhesion (location) (8) Paper box with cutter

Claims (3)

[Claims] The present invention provides a rigid cylindrical portion formed by applying a relatively large tension to an appropriate layer without winding the core around a core, thereby forming a rigid cylindrical shape. A coreless roll-shaped soft synthetic resin film comprising a film winding layer in which a portion following the portion is a low tension portion 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 the end portion of the film at a plurality of positions along the winding direction. 3. The coreless roll-shaped flexible 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. Synthetic resin film.