JPH09272100A - Guiding structure for cotting plastic film by hand - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure a straight cut and prevent decrease in a tensile strength with a reinforcing effect. SOLUTION: On one surface of a plastic film non-through type recessed grooves 1 are intermittently formed in a liner direction where a plastic film is cut, perpendicular to a film takeup direction and also such recessed grooves 1 are parallely formed at intervals in the takeup direction, while on the other surface an adhesive is arranged to form an adhesive tape. The length of the groove 1 in the hand cutting direction is 1.5mm and the width thereof in the takeup direction is 0.2mm, and many grooves 1 are intermittently formed in parallel at intervals of 1.5mm in the takeup direction. The grooves 1 are formed by the pressure fusion method using projections on the outer circumference of a heating drum, whereby the resin 11 fused out of the grooves 1 swell up therearound and a plurality of non-groove parts 2 are formed along the takeup direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hand-cutting guide structure for plastic films used for various purposes such as tapes and bags.

[0002]

2. Description of the Related Art A conventional structure that facilitates hand-cutting is to countless scratches on the film surface by rotating and pressing the film with a roller coated with ultra-high hardness fine powder particles.
There is one that guides hand-cuts in a direction perpendicular to the film winding direction. Alternatively, it is known that a zigzag-like cut is made in the seal portion and a notch is provided in the seal edge. However, in each case, the cut surface is oblique and the cut surfaces are not uniform.

[0003]

SUMMARY OF THE INVENTION Therefore, the present invention provides a hand-cutting guide structure for a plastic film, which can prevent diagonal cuts and can be cut straight, and which has a reinforcing effect and can prevent a decrease in tensile strength. Is.

[0004]

Therefore, according to the present invention, there is provided a concave strip formed on one side of a plastic film in a hand-cutting direction perpendicular to the winding direction of the plastic film by melting due to pressure contact of a heat-projecting body. Grooves are formed by connecting and disconnecting in a straight line, and a large number of groove grooves are formed in parallel at intervals in the winding direction to form a non-grooved band without grooves, forming multiple rows in series in the winding direction. It is a hand-cutting guide structure of a plastic film having the above configuration. It should be noted that recessed grooves with a length in the manual cutting direction of several mm or more and a width in the winding direction of 0.2 mm to several mm are intermittently formed in the manual cutting direction at intervals of 0.2 to several mm.
You may form a grooveless zone with a width of 0.2 to several mm. Also, a groove is formed in parallel on one side of the plastic film tape,
An adhesive tape may be formed by attaching an adhesive to the one surface or the other surface of the tape.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to illustrated embodiments. The example of the form shown in FIG. 1 is an enlarged view of a plastic film, and on one side thereof, a non-penetrating recessed groove 1 is formed in a straight line in a manual cutting direction perpendicular to the winding direction of the film. A large number of recessed grooves 1 are formed in parallel at intervals in the winding direction. In this example, a groove 1 with a length of 1.5 mm in the manual cutting direction and a width of 0.2 mm in the winding direction is formed intermittently at intervals of 0.3 mm in the manual cutting direction. Countless parallel formations are made at intervals of 1.5 mm.

As shown in FIG. 2, the recessed groove 1 is formed by melting by virtue of the pressure contact of the heat projecting body 6 projecting on the outer periphery of the heating drum during film formation or secondary processing. With a polypropylene film having a melting temperature of 200 ° C and a film thickness of 50 μm, the temperature of the heating drum is 400 ° C, the temperature of the slug is 320 ° C, and the pressing force of the slug is 5 kg / cm.
In the case of No. 2, the running speed of the film is 45 m / min and the groove depth of the groove 1 is 25 to 30 μm. When the traveling speed is slowed down, the groove depth of the groove 1 becomes deep.

[0007] Then, due to the molten recess of the recessed groove 1,
As shown in FIGS. 3 and 4, the resin 11 melted in the groove groove 1 rises from the surface line 10 to the periphery of the groove groove 1 and becomes thick. In addition, a plurality of non-grooved bands 2 without the concave groove 1 are formed in series in a row along the winding direction.

According to this embodiment, the film can be easily cut linearly at an arbitrary position by the groove groove 1 which is intermittently formed in a straight line in the manual cutting direction. Further, due to the rise of the molten resin 11 in the groove groove 1, the thickness of the peripheral edge of the groove groove 1 becomes about 75 μm, which provides intermittent reinforcement.

Further, since the grooveless belt 2 linearly remains in a plurality of rows along the winding direction, a required strength can be secured,
Moreover, as shown in FIG. 4, when the groove is continuous with the peripheral portion of the groove 1 which is adjacent in the hand-cutting direction, it becomes a thick state, so that the tensile strength is further improved even with the grooveless band 2 having a narrow width. . Further, due to the inclusion of air bubbles due to the formation of the groove groove 1, the peripheral portion of the film becomes cloudy and the entire film has a white light-shielding property. By leaving a smooth surface on the opposite non-processed surface,
The printing process and the coating or application of the pressure-sensitive adhesive can be easily performed as usual. In addition, since the continuous band 3 along the hand cutting direction remains with the width of the groove groove 1, there is no problem in the tear strength in the hand cutting direction.

Next, in the embodiment shown in FIG. 5, a plastic film is used as an adhesive tape, and the groove grooves 1 are provided in parallel on one side as in the previous embodiment, and the same is applied to the edge portion. A part of the groove is provided, and the adhesive 4 is applied to the opposite surface as shown in FIG. According to this, the tape can be manually cut linearly at an arbitrary position. Further, as shown in FIG. 7, the wound-up adhesive tape comes into contact with the peripheral edge of the groove 1 of the tape that is wound underneath, so that the adhesive surface is extremely small and thus the peelability is good. The peeling can be easily performed without applying a silicon coating film on the relative surface. In the case of using the adhesive tape, as shown in FIG. 8, the adhesive 4 may be applied to the rising peripheral edge portion of the concave groove 1, and since the adhesive area of the adhesive 4 is small as in the above case, the adhesive tape is not used. The peeling is easy.

The present invention is not limited to this, and the usage of the plastic film is not limited. As shown in FIG. 9, the adhesive paper 5 may be attached or combined,
The guide of the groove groove makes it easy to cut by hand, so no special cutting equipment is required.

Further, the length, width and intermittent interval of the groove may be determined according to the intended use. However, the length in the manual cutting direction is several mm or more and the width in the winding direction is 0.2 mm to several mm or less.
It was optimum to intermittently form at intervals of. However, depending on the intended use, the groove groove and the intermittent width thereof may be increased. In the case of using an adhesive tape, a groove with a length in the manual cutting direction of 1 to 2.5 mm and a width in the winding direction of 0.5 mm or less is intermittently formed in the manual cutting direction at intervals of 1 mm or less.
It is optimal to form concave groove grooves in parallel in the winding direction at intervals of 2 mm or less to form a grooveless zone of 1 mm or less.

[0013]

According to the first aspect of the present invention, the film can be easily and linearly cut by hand at any position by means of the concave groove formed in a straight line in the manual cutting direction. Due to the rise of the molten resin, the peripheral edge of the groove is thickened to form a durable film. In particular, since the apparent thickness of the entire film increases due to the rising of the groove in the groove due to the molten resin, it can be used as a thick film. Further, the thick wall portion around the groove of the groove becomes a wall portion, which has good drainage property and is less likely to cause dew condensation, and can be used for a cover film for fresh products, a laying film, and the like. In addition, since the groove is non-penetrating, a smooth surface can be secured on the opposite surface, and there is no hindrance to the steps of printing, coating, adhesive bonding, and the like, and the passage of water and various fungi can be prevented.
Further, the formation of the concave groove makes the surroundings cloudy and becomes light-shielding.

Further, in the second aspect, it is possible to smoothly and surely cut the hand, and in the third aspect, the adhesive tape can be easily linearly cut and can be easily peeled from the lower winding tape. .

[Brief description of drawings]

FIG. 1 is a partially enlarged plan view of an exemplary embodiment of the present invention.

FIG. 2 is a vertical cross-sectional side view of essential parts showing a step of forming the groove.

FIG. 3 is an enlarged vertical side view of the tape.

FIG. 4 is an enlarged vertical sectional front view of the tape.

FIG. 5 is an enlarged plan view of an adhesive tape.

FIG. 6 is an enlarged front view of the adhesive tape.

FIG. 7 is an enlarged vertical side view showing the peeling from the stacked state.

FIG. 8 is an enlarged vertical cross-sectional side view of an adhesive tape having an adhesive on the periphery of the groove.

FIG. 9 is an enlarged side view of another example.

[Explanation of symbols]

 1 Recessed groove 11 Molten resin 2 Non-grooved band 3 Continuous band 4 Adhesive 5 Adhesive paper 6 Heat sink

Claims (3)

[Claims] 1. A plastic film on one side,
In the manual cutting direction, which is perpendicular to the winding direction of the plastic film, linear grooves are formed by cutting the groove grooves that are formed by melting due to the pressure contact of the heat-generating body, and the groove grooves are spaced in the winding direction. A hand-cutting guide structure for a plastic film, characterized in that a plurality of grooveless strips having no groove is formed in a row in a row along the winding direction by forming a plurality of rows in parallel with each other. 2. A concave groove having a length in the manual cutting direction of several mm or more and a width in the winding direction of 0.2 mm to several mm or less in the manual cutting direction.
2. The hand-cutting guide structure according to claim 1, wherein the grooveless band having a width of 0.2 to several mm is formed intermittently at intervals of 0.2 to several mm. 3. The hand-cutting guide structure according to claim 2, wherein a groove is formed in parallel on one surface of the plastic film tape, and an adhesive is applied to the one surface or the other surface of the tape to form an adhesive tape.