JPH082548A - Tying tape, tying method, and tied article - Google Patents

Abstract

PURPOSE:To readily, accurately, and firmly tie an article without damage on the article, improve the feeling of touch, easily unpack the tied article, remove superfluous materials after use, and not to hide the indicated marks provided on the article. CONSTITUTION:This strip like tape 10 is made of a synthetic resin and less than 100 micron m in the thickness, 20% or less in haze 10% or more in the longitudinal heat-shrinkage, and 100g/15mm-width or more in the stress of heat- shrinkage. In this way, the tape can be cut by hands without use of a cutting tool like a knife, etc. And hence, the tied article can be easily unpacked and since the tape is thin and it is easily bent, it is not bulky and it is flexible and extensible and hence the feeling of touch is good.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a binding tape used for binding a plurality of boxes containing various products, a binding method therefor, and a bound product.

[0002]

2. Description of the Related Art Merchandise and other commodities are handled while being distributed in a box in a fixed number during the distribution process. Further, a plurality of boxes containing these products and the like may be handled collectively as a fixed number. At this time, a binding tape is used for tightly bundling the packed boxes so that they are not separated. A polypropylene band is often used for the binding tape by extruding polypropylene, stretching it into a tape shape, or embossed. This conventional PP band binds an object to be bound by being tightly bound to the object to be bound, and since a bundling device and the like has been developed and mechanized, the breaking strength is strong. Since the objects can be tightly bound and the PP band wrapped around the binding can be easily held, the binding can be easily held.
It is convenient and widely used for work such as carry-out and carry-in.

[0003]

However, since the conventional PP band has a very high tear strength, a tool such as a knife is required to cut the PP band when unpacking, so that the PP band cannot be opened. Packing is troublesome. In addition, since the PP band is stiff to enhance its physical properties, the PP band that is no longer needed after unpacking is rather bulky and should be discarded, especially when a large amount of unnecessary PP bands occur. However, it was inconvenient because it was necessary to provide a large storage space. Further, on the surface of the object to be bound, characters or symbols such as bar codes for printing contents are often printed, but the conventional PP band is opaque, and these characters and It is inconvenient because the symbols and the like may be hidden under the PP band. In addition, while a worker grips the PP band during transportation work, the PP band is stiff, and if the PP band is gripped for a long time or several times, the hand gradually becomes painful and the work efficiency is lowered. is there. Although there is some looseness between the PP band and the object to be bound, the PP band is easier to grip,
If this slack is too large, there is a risk of load collapse, and if the PP band is not returned to its original position after the PP band is gripped and worked, the load may still collapse.
Also, in order to increase the binding strength in order to prevent load collapse,
Since the PP band must be bound to the object to be bound while applying a high tensile force, and accuracy is required for the winding position and the like, a binding error is likely to occur. Furthermore, PP
When the PP band is wound while being pulled in order to tightly wind the band around the object to be bound, when the object to be bound is made of paper, the PP band will bite into the object to be bound and damage the object to be bound. Therefore, the tension applied to the PP band has to be adjusted, and the binding work requires a lot of labor.

The present invention has been made in order to solve the above-mentioned problems, and it is possible to easily and accurately bind the objects to be bound and to firmly bind them without damaging them, improve the tactile sensation, and easily unpack them. The present invention provides a binding tape that binds a bound object well after use and that does not hide the display attached to the surface of the bound object, a binding method for the bound tape, and a bound object.

[0005]

The binding tape of the present invention comprises:
A synthetic resin band tape having a thickness of 100 μm or less, a haze value of 20% or less, and a heat shrinkage ratio in the longitudinal direction of 10
%, And the heat shrinkage stress is 100 g / 15 mm width or more.

In the binding method of the present invention, the haze value is 20% or less, the heat shrinkage ratio in the longitudinal direction is 10% or more, and the heat shrinkage stress is 1.
A band-shaped synthetic resin tying tape having a width of 00 g / 15 mm or more and a thickness of 100 μm or less is wrapped around the object to be bound, and then the object to be bound is heated to thermally shrink the binding tape to bind the object. To do.

According to a third aspect of the present invention, in the binding method, the band-shaped synthetic resin binding tape is wound around a rectangular parallelepiped bound object at least twice so as to intersect with each other, and then the bound object is heated to bind the binding tape. 3. The binding method according to claim 2, wherein the heat-shrinking is performed for binding.

The bundle of the present invention has a haze value of 20% or less, a heat shrinkage ratio in the longitudinal direction of 10% or more, and a heat shrinkage stress of 1.
It is characterized in that a band-shaped synthetic resin binding tape having a width of 00 g / 15 mm or more and a thickness of 100 μm or less is wound.

According to a fifth aspect of the present invention, in the second aspect of the present invention, the bound article has a rectangular parallelepiped shape, and the band-shaped synthetic resin tying tapes are wound at least twice so as to cross each other. It is characterized by that.

The bound product according to claim 6 is characterized in that the bound product is a cardboard box.

[0011]

The present invention will be described in more detail below. The binding tape of the present invention is a synthetic resin band tape. The width of the tape is appropriately determined depending on the weight and size of the material to be bound, but usually, if the weight of the material to be bound is 10 kg or less, the width of the tape is set to 50 to 100 mm to improve the usability. The ability to withstand use can be maintained without loss.

Since the binding tape of the present invention is transparent, it is possible to prevent the display on the surface of the binding object from being hidden under the binding tape. It is sufficient that the transparency has a haze value of 20% or less, more preferably 15% or less.

For the binding tape of the present invention, medium / high density polyethylene, low density polyethylene, polyolefin such as polypropylene, thermoplastic resin such as PVC or vinylidene chloride can be applied, but high density polyethylene or the like tends to be inferior in transparency. And linear low density polyethylene (LLD
PE) and polypropylene are particularly suitable. The tying tape of the present invention is manufactured by cutting these resins into a film shape by extruding and then extruding these resins into a tape shape.

To bind an object to be bound with the binding tape of the present invention, first, the binding tape is wrapped around the object to be bound. If it is a long binding tape, it is cut after welding according to the size of the material to be bound. By fusing the ends of the binding tape by heat sealing, the binding tape is wound in an annular shape. Then, the binding tape wound with the binding tape is subjected to a heating means such as passing through a shrink tunnel to heat-shrink the binding tape. Due to this heat shrinkage, the binding tape tightly binds the objects to be bound.
Therefore, in the binding tape of the present invention, it is essential that the band-shaped tape has heat shrinkability in the longitudinal direction, and it is preferable that the heat shrinkage rate is 10% or more. Since the binding tape of the present invention comes into close contact with the object to be bound by heat contraction, it is not forcibly bound to the object to be bound by a machine or the like and does not damage the object to be bound. Further, high precision is not required for the pulling force and the position at the time of winding, and the winding can be easily performed.

Further, the bundled product can be used for work such as transportation by grasping the binding tape. Therefore, it is preferable that the binding tape has some extensibility so that it can be easily grasped. This is because if it has an appropriate extensibility, it is possible to insert a hand into the space between the binding tape and the object to be bound, which is generated by the stretching of the binding tape, and the workability is improved. The binding tape of the present invention has stretchability and flexibility, is easy to grasp, and has a good feel,
Even if the binding tape is gripped for a long time or a large number of times, the operator's hand is less likely to be hurt and the work efficiency can be prevented from lowering. Further, if the binding tape of the present invention, even if the binding tape is pulled and a load is applied to the heat seal portion and the like, the tape itself expands and contracts, so that the load on the heat seal portion and the like can be reduced, High durability performance. Further, as described above, even after the binding tape is stretched and subjected to the work, the binding tape is restored to the original binding state,
The objects to be bound can be tightly bound again.

If it is uniaxially stretched,
The tape has high strength in the longitudinal direction and does not break, but it easily tears in the width direction of the seal portion and can be torn without using a tool such as a knife, so that it is easy to unpack. The breaking strength of this binding tape and the easiness of tearing of the seal portion can be controlled by the draw ratio. Further, since the binding tape of the present invention is thin and not stiff, it does not become bulky, it fits well when stacked after use, and does not require a large storage space.

[0017]

EXAMPLE An example of a method of binding objects to be bound using the binding tape of the present invention will be described with reference to FIG. The embodiment shown in FIG. 1 binds an object to be bound 14 in which three rectangular parallelepiped boxes 14a, 14b, 14c are stacked, and reference numerals 10 and 10 'are binding tapes, which are tape rolls 12, It is wound around 12 'and stored. The bundle 14 to be bound on the belt conveyor 16 is sandwiched by the binding tapes 10 and 10 'pulled out from the tape rolls 12 and 12' at a predetermined position, and at the same time, the open end of the binding tape is covered by the heat sealer 18. The object to be bound 14 is heat-fused
The binding tape 10 is wound around. At this point, there is some looseness between the object to be bound and the binding tape,
Next, the material to be bound 14 on which the binding tape is wound passes through the shrink tunnel 20 kept at a predetermined temperature and is heated in the shrink tunnel 20. The binding tape shrinks when heated, and the binding tape tightly binds the objects to be bound. The temperature inside the shrink tunnel is preferably higher than the drawing temperature of the tape, for example 190 ° C.
As a transit time of about 8 seconds can be applied.

The recovery test of the binding tape of the present invention was conducted. In the test, the load (3 kg, 6 kg, 9 kg) was applied to the binding tape five times every 5 minutes, the elongation of the binding tape at the time of loading and the length of the binding tape at the time of non-loading before the test. (Recoverability) is measured. The binding tape used for the test has a length of 1 m and a width of 6
A polyethylene tape having a thickness of 5 mm, a thickness of 100 μm, a heat shrinkage of 54% and a heat shrinkage stress of 1160 g / 15 mm width.
The test results are shown in FIG. From FIG. 2, it can be seen that the tape of this example is intermittently loaded with a load of 5 even though it easily stretches.
It can be seen that even after the addition is repeated, the length is almost returned to the original length and the recoverability is high.

Next, the same test was actually carried out by winding it in a rectangular parallelepiped box. In this test, as shown in FIG. 3, a binding tape is wound around a rectangular parallelepiped having a weight of 9 kg, heat-shrinked and brought into close contact with the rectangular parallelepiped, and then the center of the tape on the upper surface of the rectangular parallelepiped is used as a fulcrum. The tape elongation when a load is applied, that is, the distance between the fulcrum and the rectangular parallelepiped is measured. The load was repeatedly applied every 5 minutes. The outer circumference of the rectangular parallelepiped is 1550 mm. The test results are shown in FIG. In FIG. 6, in FIG. 6 (a), a binding tape having the same length as the outer circumference of a rectangular parallelepiped is used, and in FIG. 6 (b), a binding tape wound by 60 mm longer than the outer circumference is wound. Fig. 6
(C) is obtained by winding a piece 120 mm longer than the outer circumference and shrinking it. Hereinafter, the difference between the outer circumference of the object to be bound and the length of the binding tape before being heat-shrinked is referred to as a shrink margin. It can be seen from FIG. 6 that all have high recoverability, but the larger the shrink margin is, the larger the elongation is and the less the recoverability is. If the elongation is unnecessarily long, the handling property may be deteriorated or the load may be collapsed. Therefore, the elongation that is too long is not preferable.

Using the binding tape of the present invention, a stack of a plurality of corrugated cardboard boxes was bound. As the binding tape, a linear low-density polyethylene film was uniaxially stretched to form a band-shaped tape having a thickness of 100 μm, a width of 65 mm, and a length of 650 mm. Various methods can be applied to the method of winding the binding tape around the object to be bound according to the present invention. However, if the object to be bound is a rectangular parallelepiped, as shown in FIG. 1 wrap around the wrapping tape, as shown in FIG.
0 crosses the upper and lower surfaces of the object to be bound 90 so as to intersect each other at 90 °, and as shown in FIG. 5, tie the tape 10 on each side of the object to be bound 14. A cross hook or the like that crosses the upper and lower surfaces is suitable. The single-strip type shown in FIG. 3 has an advantage that the binding tape can be easily wound around an object to be bound. In the case of the cross hanging shown in FIG. 4, once the single hanging is performed, the bundled article is put in 90
It is only necessary to rotate by one degree and carry out the work of hanging one line again, and the binding force can be further improved while maintaining the ease of work. The binding method by crossing shown in FIG. 5 has a very high binding force and is less likely to cause a shift of a bound object. The conventional binding tape can be hung on one side or crossed, but since the binding tape is stiff and has poor followability, it is difficult to stabilize the binding tape on the corners and cross application cannot be applied. However, with the binding tape of the present invention, since it has flexibility and heat shrinks, it can be attached in close contact with the object to be bound, and the winding method as shown in FIG. 5 is also possible. The binding force can be significantly improved. That is, it can be said that the binding tape of the present invention is a binding method.

The thickness, width and binding method of the material to be bound, the binding tape and the binding method were changed, and the binding material was tested for extensibility, restoration and stability, and overall evaluation was performed. Table 1 shows the evaluation results. In addition, the bundled object used in the test is a cardboard box as a bundled object, as shown in FIG. 3 or FIG.
The box type A is a rectangular corrugated cardboard box having a length of 250 mm, a width of 420 mm, a height of 142 mm and a weight of 1 kg. Similarly, box type B is a cardboard box with a size of 295 mm x 440 mm x 170 mm and a weight of 1.5 kg, and box type C is 310 mm x 365 mm.
3kg at × 150mm, Box type D is 370mm × 550mm × 55
It is a cardboard box of 2.25 kg in mm. Therefore, for example, the bundle of sample No. 1 has a length of 250 mm, a width of 420 mm, a height of 284 mm and a weight of 2 kg.
The size is 0 mm x 365 mm x 450 mm, which weighs 9 kg. In addition, each binding tape was shrink-treated at 190 ° C. for 8 seconds. In Table 1, the suspension test is a test conducted to examine the extensibility, and is caused by stretching of the binding tape when the binding tape is lifted by hooking the central portion of the binding tape on the upper surface of the bound material as a fulcrum. The distance between the fulcrum and the upper surface of the bundle is measured. Therefore, the larger the value, the greater the extensibility of the binding tape. As described above, the extensibility of the binding tape is preferably neither too large nor too small, and the value of this suspension test is preferably in the range of 30 to 100 mm.

In Table 1, the resilience is measured by performing a suspension test, measuring the time until the binding tape comes into close contact with the object to be bound again when the suspension is stopped and the binding tape is released. Those that returned within seconds were indicated by ◯, those that took 3 to 10 seconds were indicated by Δ, and those that took 10 seconds or more were indicated by x. Stability was tested by performing a suspension test to see if the tape returns to its original position when it was restored. As a guide, ○ in Table 1 is restored to the original position,
X indicates a large deviation, and Δ indicates an intermediate position. If ○ or △, it can be judged that there is no problem in practice. Table 1 shows a comprehensive evaluation judged from these suspension tests, restoring forces, and stability test results.
A circle or a circle indicates that the tape is excellent as a binding tape, and a cross indicates that it is inappropriate.

[0023]

[Table 1]

From Table 1, all the samples other than Samples 9 and 11 have appropriate elongation, good restoring force and stability, and by appropriately stretching, the binding tape is grasped for carrying in, carrying out, etc. It is found to be desirable as a binding tape because it is convenient for performing work and returns to its original position quickly after work to bind the objects to be bound. In addition, the elongation can be controlled by changing the width of the binding tape,
It can be seen that by increasing the width, the elongation is suppressed and the restoring force and stability are improved.

[0025]

According to the present invention, since it is possible to cut manually without a cutting tool such as a knife, it is easy to unpack the bundle. In addition, because it is thin and weak,
The bulkiness is small, and the occupied area of the storage place after use can be reduced. In addition, since the binding tape is flexible and stretches, it has a good feel, and the hand is less likely to hurt during long-time manual work, and a decrease in work efficiency can be suppressed. Further, the expansion and contraction of the tape can reduce the load on the heat-sealed portion and the like, and the durability performance is high. Further, since the binding tape of the present invention is transparent,
Even after the tying tape is wound, the characters and symbols such as barcodes attached to the surface of the material to be bound are hidden by the tying tape and cannot be read. Therefore,
Bar codes and the like can be read from above the binding tape, and the aesthetic appearance is not spoiled.

Further, since the binding object is heated together with the binding object by means such as passing through a shrink tunnel after being wound, the binding tape can be tightly adhered to the binding object and firmly bound. The strength of the tensile force when attaching the binding tape and the high accuracy of the winding position are not required, and binding mistakes are less likely to occur. Moreover, even if the object to be bound is made of paper such as a cardboard box, the binding tape does not bite into the object to be bound and damage the object to be bound.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a binding method of the present embodiment.

FIG. 2 is a graph showing the results of extensibility and recovery tests of the binding tape of this example.

FIG. 3 is an example of a bound product.

FIG. 4 is an example of a bound product.

FIG. 5 is an example of a bound product.

FIG. 6 is a graph showing the results of an extensibility and recovery test when binding the objects to be bound with the binding tape of this example.

[Explanation of symbols]

 10 Bundling tape 14 Bundling object

Continuation of the front page (72) Inventor Koshi Tanamoto 4-1, Nibashi Kobunecho, Chuo-ku, Tokyo Inside Heisei Polymer Co., Ltd.

Claims (6)

[Claims] 1. A strip-shaped tape made of synthetic resin having a thickness of 100 μm or less, having a haze value of 20% or less, a longitudinal heat shrinkage of 10% or more, and a heat shrinkage stress of 100 g / 15 mm width or more. A binding tape characterized in that 2. A band-shaped synthetic resin binding tape having a haze value of 20% or less, a heat shrinkage ratio in the longitudinal direction of 10% or more, a heat shrinkage stress of 100 g / 15 mm width or more, and a thickness of 100 μm or less to be bound. After wrapping around an object, the object to be bound is heated to heat-shrink the tying tape to tie the object. 3. The band-shaped synthetic resin binding tape is wound around a rectangular parallelepiped bound object at least twice so as to intersect with each other, and then the bound object is heated to heat-shrink the binding tape for binding. The binding method according to claim 2, wherein: 4. A band-shaped synthetic resin binding tape having a haze value of 20% or less, a longitudinal heat shrinkage of 10% or more, a heat shrinkage stress of 100 g / 15 mm width or more, and a thickness of 100 μm or less is wrapped. A bundle that is characterized by: 5. The bound product according to claim 4, wherein the band-shaped synthetic resin binding tape is wound at least twice so as to intersect with each other. 6. The bound product according to claim 5, wherein the bound product is a cardboard box.