JPH0741036A - Rolled tape for automatic banding machine - Google Patents

Abstract

PURPOSE:To provide a transparent, stiff rolled tape which has a good slip property and allows carrying out banding work without a possibility of buckling even if a large diameter rolled tape wound on a paper pipe is used when commodities are efficiently, individually packaged and banded by an automatic banding machine. CONSTITUTION:A rolled tape 2 for an automatic banding machine is wound on a paper pipe 1 and is a transparent band-like film made of a multilayer film containing at least a biaxially-oriented film layer or of a biaxially-oriented single layer film. And, minute scars 3 that protrude from one side to the other are concentratedly made along both edges of the rolled tape 2 and the roll tape 2 has an elastic modulus in tension of 80-300kg/mm<2> and is heat-fusion- adhesive on both sides.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding tape for an automatic wrapping machine, which is used for individually wrapping products by using an automatic wrapping machine or for easily packing printed matter.

[0002]

2. Description of the Related Art An automatic strapping machine stores a wound strong string in the machine, and a string unwound by a power input consisting of a simple operation such as stepping on a pedal firmly surrounds an object to be packed on a table. It is a very convenient machine that can be wrapped around and heat-bonded at both ends to instantly hang it, making packing work more efficient. Since this machine passes the unwound string through the guide, the string that can be used for the strapping machine has a high tensile elastic modulus,
There is a so-called "stiffness", and it is required to be wide and flat. Therefore, the commercially available flexible cord cannot be used for the strapping machine.

The string used in the banding machine is a band-shaped product mainly made of polypropylene and having a sufficient tensile elastic modulus of about 2 cm width for packing heavy objects. Therefore, it is well recognized by consumers that the cutting of the string must be done with a blade when unpacking this package. Belt strapping machines are also used for simpler packaging. In this case as well, the tensile elastic modulus and the flatness are still required for the string, but a string suitable for the packaged item is sufficient for the strength. Therefore, a paper string is also used, but in this case, the paper itself has a high tensile elastic modulus, and both sides are covered with a heat-fusible plastic material so that they can be heat-sealed. Are using. Therefore, all the strings that can be used for the strapping machine are wide and have a high tensile elastic modulus.

However, in a place where the object to be packaged itself has moisture, such as lunch boxes, and therefore the packaging workplace is also full of moisture, the paper string is covered on both sides with a plastic material. However, the inside of the paper was wet and the desired packaging could not be achieved. In addition to the large quantity of commercially available bento boxes that need to be shipped, automation is also required for the strapping work, and naturally, a string resistant to moisture is required. Therefore, as a plastic having a high tensile elastic modulus, a belt-shaped film made of biaxially stretched plastic stretched in the lateral direction was used.

[0005]

The biaxially stretched plastic cord has very good slipperiness, and although it is wide, it is limited as long as it is used as a strip film.
It is about 3 cm. In order to wind such a string around the paper tube and store it in the strapping machine, considering the efficiency of the strapping machine, it is preferable to wind as long a string as possible on one paper tube. Therefore, if you wind a string of 200 m or more around a paper tube with an outer diameter of about 40 mm,
Some rolled materials have a diameter exceeding 200 mm. In this way, the wound product having a large diameter and a width, that is, a wound thickness of about 1 to 3 cm has good slipperiness between the strip-shaped films, so that it can be used in a strapping machine even during the distribution process or for use. If you do not handle it carefully when you put it on, it may collapse. When the winding collapse occurs, not only the winding tape cannot withstand use, but the work performed due to the fear of the winding collapse is very fatigued and the efficiency is low. Therefore, there has been a demand for a plastic winding tape for a strapping machine that does not collapse even if the winding diameter is increased.

[0006]

SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problems and has a structure of a winding tape for an automatic banding machine wound around a paper tube, in which at least one layer is biaxially stretched. It is a strip-shaped film consisting of a multi-layer film or a biaxially stretched single-layer film, in which fine scratches protruding from one surface to the other are densely arranged along the edge line and have tensile elasticity. The rate is 80 to 300 kg / mm ² , and both sides are heat-fusible.

The band-shaped film of the present invention, that is, the material of the tape may be a single-layer product or a laminated product, but in the case of a single-layer product, it is required to be a biaxially stretched film, In the case of a laminated product, at least one layer must be a biaxially stretched film. A strip-shaped film that has only been vertically stretched is insufficient in tension in the horizontal direction, cannot pass through the guide of the stripping machine, and is not preferable as a winding tape for an automatic stripping machine. Further, in the strapping machine, since both ends of the tape are overlapped and heat-bonded, it is necessary that both surfaces are made of a heat-fusible material. Generally, the softening temperature is 80 to 200 ° C, preferably 120 to 190 ° C, more preferably 130 to 1
It is 80 ° C. In the present invention, since a material having a high tensile elastic modulus, which will be described later, is used, the heat fusion temperature tends to be necessarily high in order to obtain practical fusion strength. The practical heat-sealing strength depends on the heat-sealing width, but the entire tape is 11 to 18 kg, preferably 13 to 18 kg measured by pulling the tape in opposite directions from both sides of the heat-sealed portion.
It is about 17 kg.

The tensile elastic modulus required for the strapping machine is as follows.
80 to 300 kg / measured according to JIS K 7127
mm ² , preferably 100 to 280 kg / mm ² , and more preferably 150 to 250 kg / mm ² . A film material having such a high tensile elastic modulus, that is, having a "stiffness", is not preferable because it has a stiff feel when used as a packaging bag. Examples of the film having a high tensile elastic modulus used in the present invention include polyester and nylon. Polyolefin can also be used,
In order to impart a sufficient tensile elastic modulus, a considerable thickness is required and a stretched polyolefin is preferable. Since the width of the tape is relatively wide, it is preferable that the tape of the present invention is transparent so that the letters and patterns below can be seen.

The film of the present invention has a band shape of 0.5 to 4 cm,
Preferably, it is cut into a width of 1 to 3 cm and wound around a paper tube for use. It is preferable in terms of work efficiency to wind a tape as long as possible within the space of the strapping machine. Therefore, in reality, a winding tape having a diameter of 150 to 200 mm, and in some cases 250 mm is used. In this way, a wound material with a large diameter has a good slidability of the film material, so even if it is sufficiently tense and wound with a uniform pressure, it is easy for them to slip with each other and will collapse if not carefully handled with care. There is a risk.

In the present invention, fine scratches are densely provided along both edge lines of the tape. This scratch has no effect if it is simply provided with a cut along the edge line of the tape, and the film is pressed until the back surface projects by using a tool having fine projections. As a result, some scratches are produced, but the strength of the tape as a string is not adversely affected. It is difficult to judge with the naked eye, but it is possible to judge by touching that one surface is protruding when touched with the hand. When this tape is wound around a paper tube, fine protrusions at the edge improve the adhesion between the tape and the tape wound on it, and there is no risk of collapse even if wound to a large diameter. It was

The strapping machine used in the present invention can be any ordinary strapping machine which can use a film tape. For example, an obi hanging machine OP-300 (manufactured by Nichiro Kogyo Co., Ltd.), a desktop tying machine (manufactured by Strapak Co., Ltd.) and the like can be mentioned.

[0012]

In the present invention, the biaxially stretched tensile modulus is high,
In order to use a tape made of a film that is "flexible" and has heat-sealing properties on both sides, when it is wound around a paper tube in order to be used in a banding machine, it projects from one side to the other side along the edge line. The fine scratches that are formed are densely applied. When the minute scratches protruding on the back surface wind the tape around the paper tube, the protruding scratches bite into the scratches on the tape wound directly underneath, and the minute scratches become entangled with each other, losing their mutual mobility. Even if it is wound to a large diameter, there is no risk of collapse and it can be used with confidence in a strapping machine. Further, the product in which the tape of the present invention is packaged by using a banding machine has a scratch mark closely attached to its edge portion, so that it can be torn by hand.

[0013]

1 is an enlarged perspective view of a part of the present invention, FIG.
FIG. 3 is a perspective view showing a state in which a lunch box container is wrapped with the tape of the present invention using a strapping machine.

In this embodiment, the tape has a thickness of 25.
A composite film was used in which a biaxially stretched polypropylene having a thickness of 40 μm was laminated on both surfaces of a biaxially stretched polyester having a thickness of 40 μm. The tensile modulus of this film is 2
It was 07 kg / mm. This film was used as a tape having a width of about 29 mm, and the front and back surfaces were overlaid and heat-sealed. The heat-bonding strength was measured by pulling the heat-bonded tape in the length direction, and the average value of the five samples was 9.9 kg at a heat-bonding temperature of 110 ° C, 15.1 kg at 120 ° C, and 130 ° C. It was 16.5 kg and 16.4 kg at 140 ° C. In this example, thermal fusion was performed at 130 to 140 ° C.

Reference numeral 1 is a paper tube having a diameter of about 40 mm and a width of 20 mm.
The tape 2 made of the above film is wound for about 200 m,
A wound tape having a diameter of about 160 mm was obtained. The tape of the present invention is a processing tool in which fine triangular protrusions are densely arranged on the circumference, and pressed while rotating along both edge lines thereof,
A group of fine scratches 3 was provided along both edge lines of the tape. This winding tape is a tape of about 20 mm width wound flat (thus, the thickness of the wound material is 20 mm), but it is stable and can be used even if a strong force is applied in the collapse direction. Even if it was violent, there was no danger of the roll collapse.

Using the winding tape of this embodiment, a box-type automatic lunch box ST-240 manufactured by Strapak Co., Ltd. was used to band lunch boxes for sale at stations. 4 is a lunch container.
Since the tape of the present invention is transparent, it is possible to obtain a banded lunch box with good workability and good appearance without hiding the pattern on the lid. When using a strapping machine, the tape is a hard tape having a high tensile modulus,
The scratches formed on the edges of the tape were not visually recognized, and in use, it was possible to tear by tearing any part of the tape in the transverse direction by hand.

[0017]

EFFECTS OF THE INVENTION According to the present invention, when individually packaged products are efficiently packed and banded by an automatic banding machine, slipperiness is good,
Even if a tape with a large diameter wound around a transparent and so-called "stiff" paper tube is used, the work can be carried out at ease without fear of collapse of the winding.

[Brief description of drawings]

FIG. 1 is an enlarged perspective view of a part of the present invention.

FIG. 2 is a perspective view of a lunch box container wrapped with tape using a strapping machine.

[Explanation of symbols]

 1 Paper tube 2 Tape 3 Scar group 4 Lunch box

Claims (1)

[Claims] 1. A strip-shaped film comprising a multi-layer film in which at least one layer is biaxially stretched or a biaxially stretched single layer film, wherein fine scratches protruding from one surface to the other surface are edges. Wrapping for an automatic banding machine wound around a paper tube, which is densely arranged along a wire, has a tensile elastic modulus of 80 to 300 kg / mm ² and is heat-fusible on both sides. Times tape.