JP2001072122A - Paper band - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a novel paper band which is sufficiently strong in tensile strength, free from producing harmful substances liable to be produced by synthetic resins when incinerated, available for being joined by heat sealing method and undergoing printing made thereon neatly and can be wound up in a roll without requiring a paper tube. SOLUTION: After a kraft paper tape T is folded double in the breadthwise direction and an adhesion is applied thereto, the folded tape is folded further in three and the adhesion is applied, and thereby a hull 1' is formed. A cored structure is materialized with a core material added when the tape is folded in three and while the tape is impregnated with a heat sealing material, winding-up is made without a core. Coloring or printing is made before the impregnation with the heat sealing material is made. A matter made of pulp board or waste paper such as a plain twist cord 5, a liner, a hemp cord or the like is used as the core material. Accordingly, a sufficient tensile strength is maintained with the hull 1' folded in six and the core material, and since the materials are all biodegradable, any harmful gas is not produced even though being incinerated, and furthermore joining can be made instantaneously by a heat sealing method.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a paper band,
In particular, the present invention relates to a flat band-shaped paper band used for packing, bundling, and the like and capable of heat sealing.

[0002]

2. Description of the Related Art There are several types of bands for packaging. For example, when binding a newspaper to be transported or banding a cardboard box in which goods are stored, a so-called "PP" is used. Bands made of synthetic resin called "bands" are frequently used. This band has an advantage that it has a high tensile strength in the longitudinal direction and can be easily bonded by a heat sealing (thermal bonding) method.

[0003]

However, this PP band is almost impossible to recycle, and furthermore, it is extremely difficult to dispose after use, for example, harmful substances such as dioxin are generated when burned. Also have. Moreover, the PP band is usually provided in the form of a roll wound around a cylindrical paper core (core) made of liner base paper. Depending on the size and length of the PP band, the paper band may be provided. However, since the thickness of the paper tube becomes extremely strong, about 10 mm, disposal of the paper tube is also a problem. In addition, the weight of the paper tube (about 1 kg) is added, and the distribution cost is considerably increased. There was also a problem of getting out. Since the amount of PP band used in Japan is enormous, enormous costs will be required to continue to safely dispose of used bands and paper tubes in the future.

In this regard, a paper band formed of pulp paper, waste paper, or the like is easy to recycle, and does not generate any harmful substances even when burned. However, the conventional paper band has only five to six paper cords arranged side by side and adhered to each other, so that the tensile strength is not always high. For this reason, the range of use is limited, and as a means for binding, it is necessary to tie or crimp through a metal caulking tool, which takes time and effort for the binding, and a caulking tool. This raises the cost of packaging and raises the problem that disposal of used caulking tools is costly.

Therefore, the present inventor considered that a conventional paper band can be heat-sealed by impregnating the same with a heat-sealing agent. However, since the thickness of this paper band is about 1 to 1.5 mm,
It cannot be adapted to the existing heat sealing device for the PP band, and therefore, it is necessary to develop or purchase a new heat sealing device compatible with the paper band. Moreover, the cost of the conventional paper band is P
Since it is 5 to 6 times higher than the P band, the packaging cost is further increased.

Further, in order to make the paper band as easy to use as the PP band, various colors must be prepared. However, most of the colored paper mass-produced today has a problem of waste liquid treatment and the like. It is limited to weak high-quality "colored high-quality paper", and there is no reality as a material to make a paper band having the same strength as the PP band. High-strength kraft paper and liner base paper have only brown and white. Is the current situation. Therefore, regarding the color, it is conceivable that the paper band is colored by the printing method.However, since the conventional paper band has a large number of deep grooves on the surface, coloring by the printing method is very difficult, and moreover, characters and pictures Printing is impossible in practice.

The present invention has been made in view of the above-mentioned conventional problems, and has a sufficient tensile strength, does not generate harmful substances even when incinerated unlike synthetic resin, and has a heat resistance. An object of the present invention is to provide a novel paper band which can be bound by a sealing method, can be printed neatly, and can be easily wound up in a roll without using a paper tube.

[0008]

In order to achieve this object, a paper band according to the present invention has a base formed in a laminated flat string shape by laminating a biodegradable paper tape. It is impregnated with a sealant.

Therefore, this paper band can be heat-sealed (heat-bonded), so that there is no trouble in packing and no special binding member such as a caulking tool is required. In particular, since this paper band has a laminated structure of several sheets, it has a sufficient tensile strength even if its thickness is reduced to a level compatible with the existing heat sealing device for the PP band. Therefore, it is possible to use the existing heat sealing device as it is, which has a great practical effect. Naturally, the tightening force can be selected in a wide range within the paper cutting limit.

Since the base material of the paper band is at least biodegradable at the base, it can be easily recycled into recycled paper, and even when incinerated, harmful substances such as synthetic resin are not generated. There is no. In particular, when used in a band for packing waste paper, it can be put into a processing step together with the waste paper.

In addition, the surface of the paper band according to the present invention is
Basically, it is flat, so that not only coloring but also display items such as characters and pictures can be easily and neatly provided by a printing method. The type of ink used for this printing is hardly restricted, but when using water-based ink, the ink gets worse after being impregnated with the heat sealant. It is desirable to carry out in a step before impregnation.

The types of materials of the present invention are pulp paper, that is, wood pulp (mechanical pulp, semi-chemical pulp, and chemical pulp), except for those containing components that do not biodegrade, such as synthetic paper. Most materials can be used, such as non-wood pulp, paper made of biodegradable plastic fiber, or waste paper. However, in order to obtain sufficient strength at low cost and with a small number of piles, for example, It is desirable to use wrapping paper such as kraft pulp (KP) paper.

There are several possible means for increasing the strength of the paper band according to the present invention. However, the present inventor has determined that no material that does not biodegrade should be used and that the flat band-like shape required for the band should not be impaired. As a result of conducting various tests on the condition that the tape as the base material was folded and laminated in the width direction while bonding it several times, the paperboard or flat stranded string or hemp string was laid on the base layer It has been found that with a structure in which such a material is sandwiched as a core material, strength not inferior to the PP band can be obtained.

As a specific structure of the former (a structure in which the tape is folded while being bonded), a structure in which a plurality of narrow tapes are simply laminated may be used, but a structure in which one tape is folded in multiple layers in the width direction is preferable. However, there is a tendency that the fiber direction of the finished base becomes more complicated and the strength increases. Since the strength increases as the number of folds in this folding structure increases, the desired number of folds cannot be specified unconditionally. However, when a band having a load capacity of about 50 to 60 kg is manufactured without a core material, the tape is folded in two. It is sufficient that the sheet is further folded in two or three after being adhered, and adhered. Further, this folded structure has a great advantage that, when a paper band containing a core material is manufactured, the core material can be stably wrapped and automation is easy.

As the paperboard used as the core material, for example, a liner or cardboard base paper may be used. The thickness of the paperboard should also be selected according to the strength required for the band. For example, when a 400 g / m2 liner is used as the core material, a load capacity of about 100 kg can be obtained. I understood. Further, when a flat stranded cord is used as the core material and wrapped in a state where the main fiber direction is along the longitudinal direction of the base, the tensile strength can be extremely increased. This configuration has the advantage that high strength can be obtained while being inexpensive.

In the present invention, sufficient strength can be obtained even with a structure having only a base without a core material. However, the tape itself forming the base has a structure in which a long net kraft paper and a circular net kraft paper are bonded to each other. In this case, it is possible to provide a high strength capable of withstanding a load of about 100 kg without a core material. This structure has an advantage that it can be manufactured inexpensively without being limited to the effect of obtaining high strength while suppressing the thickness.

Since the paper band according to the present invention has at least a base bonded structure, it is impregnated with an adhesive, and it is easy to use the adhesive to take up a coreless roll. become. That is, when the paper band is wound into a roll, a heating roller is used as a temporary winding core material, and the paper band is wound around the heating roll while water is applied to the start portion (one end side portion) of the winding. If you do
The adhesive impregnated in the base and core material is activated by moisture and high heat, and the overlapping surfaces adhere to each other and solidify in a cylindrical shape. This solidified part functions as a core for winding. I do. Needless to say, even in the case where the winding is performed in a coreless manner, the adhesive may be applied to the beginning of the winding.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a paper band according to the present invention will be described with reference to the embodiments shown in the drawings.

[A. First Embodiment] (Refer to FIG. 1) FIG. 1 shows a paper band 1 according to a first embodiment of the present invention, which has a core-free structure without a core material. The paper band 1 is made of a kraft paper tape T having a width of about 65 mm (the thickness of the tape is exaggerated in the drawing), and the tapes T are folded and adhered so that a total of six tapes T are stacked. It is. More specifically, a tape T as a material is first folded in two in the width direction and bonded to each other, and then bonded together, and then folded in three in the width direction and bonded to each other. Therefore, 6
Each layer overlapped on the sheet has a structure in which the layers are bonded to each other on the entire surface. The specific type of kraft paper is 50 grams /
It is a square meter machine made from Ryosana Fourdrinier.

As a result of being folded and bonded as described above, the tape T as a material has a width of about 11 mm (10 mm depending on the thickness of the tape T used and processing conditions).
~ 15mm), about 0.5mm thick (0.4 ~ depending on the thickness and processing conditions of the tape T used
It becomes a flat string with a strong waist of about 0.8 mm). This is the base. The base is impregnated with a heat sealing agent and then dried. When the paper band 1 thus configured was subjected to a paper cutting test, the paper band 1 generally endured a static load of up to 60 kg.

Although not shown, a long net kraft paper (100% pulp) and a circular net kraft paper (100% waste paper)
When the tape T was used as the tape T, even with the base without the core material, the static load was generally up to 100 kg.

[B. Second Embodiment] (FIG. 2) FIG. 2 shows a paper band 3 according to a second embodiment of the present invention. The difference between the paper band 3 and the paper band 1 is that the base of the paper band 1 is an outer skin,
The core material is wrapped in this base. Therefore, the description will be made only on this difference, and the description of the base will be omitted by attaching reference numeral 1 'in the drawings.
The use of such codes and their meanings are the same in the third and fourth embodiments described later.

In the paper band 3, a flat twisted cord is used as the core material 5. The core material 5 is placed on the base 1 ′ with its main fiber direction being along the longitudinal direction of the base 1 ′.
When the tape T, which is the material of the base 1 ′, is folded in two and then folded in three, it is attached to the base 1 ′. Therefore, the whole core material 5 is completely wrapped in the base 1 ′,
And it is adhered to the base 1 '. The paper band 3 thus configured was subjected to a paper cutting test. As a result, the paper band 3 generally endured a static load of up to 80 kg.

[C. Third Embodiment] (FIG. 3) FIG. 3 shows a paper band 11 according to a third embodiment of the present invention.
It shows. The paper band 11 has a base 1 'as an outer skin, and wraps a core material 13 composed of a liner of 180 g / m 2 or a liner of 400 g / m 2. Core 13 to base 1 '
Is similar to the core material 5 in the paper band 3, after the tape T, which is the material of the base 1 ', is folded twice.
When it is folded, it has a structure attached to the base 1 '. Therefore, the entire core material 13 is also the base 1
′ And is adhered to the base 1 ′.

The paper band 11 was subjected to a paper cutting test. As a result, the core material 13 having a liner of 180 g / m 2 was able to withstand a static load of up to 70 kg and a liner of 400 g / m 2 was used. The material 13 was able to withstand a static load of up to 100 kg.

Although not shown, the above two types of liners (a 180 g / m 2 liner and a 40
(A liner of 0 g / m2) as a core material, and a paper band in which this core material is wrapped in a base 1 'was also prototyped and subjected to a paper cutting test. confirmed.

[D. Fourth Embodiment] (FIG. 4) FIG. 4 shows a paper band 21 according to a fourth embodiment of the present invention.
It shows. This paper band 21 uses two hemp cords having a thickness of about 0.5 mm as the core material 23. The core members 23 are arranged at a certain distance from each other, and have a structure in which the tape T, which is the material of the base 1 ′, is folded into two and then folded into three when it is folded into three. I have. Therefore, the entire core material 23 is also completely wrapped in the base 1 'and adhered to the base 1'. When the paper band 21 was subjected to a paper cutting test, the paper band 21 withstood almost up to a static load of 80 kg. Therefore, it is considered that the hemp string core material 23 has an effect of increasing the strength at a rate of about 10 kg per one.

It is conceivable to further increase the strength by using this hemp string core material 23 as the core material of the paper bands 3 and 11 containing the core material. For example, in the paper band 3 of FIG. 2, as shown by a two-dot chain line
A core material is formed by wrapping the hemp string 23 in the flat twisted string 5. Of course,
The hemp string 23 may be used in combination with the paper band 11 made of paperboard as a core material.

[E. Manufacturing Method] (FIGS. 5 to 7) Next, an example of a method of manufacturing a paper band according to the present invention will be described with reference to a case where the paper band 3 is colored and wound up corelessly. FIG. 5 shows an example of a production line.

The tape T pulled out from the roll 31 around which the tape T as a material is wound is applied to a creasing roller 33.
Valley line 3 at the middle position in the width direction of the lower surface.
5 (see FIG. 6A), the glue 37 is brought into contact with the lower surface thereof, so that the adhesive 39 is applied to the entire surface.
(Shown in a satin pattern in FIG. 6) is applied. As the adhesive, PVA (commonly called “Poval”) was used for the time being, but it is preferable to use a biodegradable type, such as “starch paste”, and if that is the case, it is more likely that Highly degradable properties can be obtained. Next, the tape T is passed through the folding guide 41 so as to be folded and overlaid in two as shown in FIG. 6B, and passed through the printing unit 43 in this state.

The printing unit 43 includes an ink bat 45 for storing ink of a desired color, an ink roller 47 partially immersed in the ink, an anix roller 49 in contact with the ink roller 47, and an ink roller 49 in contact with the ink roller 47. The tape T, which is provided with a rotating plate roller 51 and the like, has the upper surface thereof in contact with the plate roller 51 so that the ink in the ink bat 45 is transferred and colored. The area 53 to which the ink has been transferred is shown by a dashed parallel line in FIG. The area 53 is almost two-thirds closer to one side in the width direction of the folded tape T. The plate roller 51 is loaded with an axial length that matches the width of the area 53. The running path of the tape T in the printing unit 43 is guided such that the plate roller 51 comes into contact with the area 53.

In addition, when the display item 55 (an example in which kanji is printed in FIG. 6C) is printed on the tape T in addition to the coloring, a separate printing unit is provided. Print characters and pictures.

The tape T that has exited the printing unit 43 is
And the adhesive 39 and the ink are dried. The drying unit 61 includes three sets of heating rollers 63 arranged along the feeding direction of the tape T. The adhesive 39 and the ink are dried when the tape T comes into contact with the heating rollers 63. The temperatures of the three sets of heating rollers 63 are set lower in order as going to the rear. When it comes out of the drying unit 61, it is passed through a pressure roller 65, and by this pressure, the state of being folded and adhered is firmly fixed.

Next, the tape T in a state of being folded and adhered is provided with two valley fold lines 71 (see FIG. 6D) on the lower surface in parallel by another creasing roller 33 '.
The valley fold line 71 is provided at a position that divides the lower surface into three equal parts in the width direction. Then, when the gluing roller 37 ′ comes into contact with the lower surface, the backing agent 39 is applied to the entire lower surface, and then is passed through a folding guide 75 for folding in three. At this time, the core material 5 (flat twisted string) is attached to the lower surface of the tape T. That is, as shown in FIG. 6 (D), the core material 5 is added to the area between the two valley fold lines 71 on the glued lower surface of the tape T, and in this state, the folding guide 7
5, the tape T wraps the core material 5 while being folded in three in the order shown in FIGS. 6 (E) to 6 (F).

As a result of this folding, the tape T
Has a structure in which the core material 5 is wrapped and adhered in six layers, the width of which is approximately 1/6 of the original width of the tape T, and the front and back surfaces of the ink used in the printing unit 43 Have color.

The adhesive 39 is dried by passing the tape T and the core material 5 out of the folding guide 75 through the drying section 61 ′, and then dipped in the heat sealing tank 77 to contain the heat sealing agent 79. Be invaded. Then, after passing through the drying section 61 "again to dry the heat sealant 79,
It is passed through a pressure roller 65 ′, and the pressure is applied to firmly fix the three-folded and adhered state. Thereby, the paper band 3 whose surface is colored in a desired color is completed by wrapping the flat stranded cord 5 and impregnating with the heat sealant 79.

Then, the paper band 3 is
Is wound in a roll in a coreless form. The winding unit 81 includes a winding roller 83 having a built-in heater, a level winder (not shown) for reciprocating the winding position of the paper band 3 wound by the winding roller 83 left and right, and a level winder (not shown). An adhesive water jet nozzle 85 supported by a winder is provided. The winding roller 83 is divided into four parts in the circumferential direction, for example, and has a structure capable of expanding and contracting the diameter.
5 sprays water or an adhesive on the paper band 3 wound by the winding roller 83.

When the paper band 3 is wound, the roller 83 is rotated with one end on the winding start side being locked on the winding roller 83, and water or adhesive is sprayed onto the paper band 3 from the adhesive water spray nozzle 85. Start by spraying. Thus, the paper band 3 is wound in a cylindrical shape by the winding roller 83, and when the winding is performed twice or three times, the spraying of the water or the adhesive is completed. Accordingly, the winding start portion of the paper band 3, that is, the portion wound with water or an adhesive and wound up into a double or triple cylinder, is hardened by the sprayed adhesive, or the outer skin 1 is formed. And the adhesive applied to the core material 5 is activated and hardened by the sprayed water or the like and the heat of the winding roller 83, and the hardened portion is wound into a core portion 87 (see FIG. 7). Make The remaining portion is wound around the core portion 87 in a roll shape, and the paper band 3 becomes a coreless paper band roll 89 as shown in FIG.

When the paper band 1 is manufactured using the manufacturing line shown in FIG. 5, a folding guide 5 for folding in three is used.
When the paper bands 11 and 21 are manufactured, the liner 13 and the hemp string 23 may be used as the core when the paper band 11 or 21 is manufactured.
Should be supplied.

Although various embodiments of the present invention have been described above, the specific configuration of the present invention is not limited to these embodiments, and all the embodiments having the gist of the present invention are described in the present invention. include. For example, irrespective of the presence or absence of a core material, the structure of the base may be a structure in which a number of narrow tapes are simply bonded together.

[0041]

As described above, the paper band according to the present invention has a sufficient tensile strength even if it is not thickened, because the base of the paper band is a laminated type formed by several laminated structures. , And can be thermally bonded, so that there is no trouble in packing, and no special bonding member such as a caulking tool is required at all. And, since all or most of the material of this paper band is biodegradable, it is easy to recycle it into recycled paper, and even when incinerated, there is no generation of harmful substances like synthetic resin. . In addition, since the surface of the base of the paper band according to the present invention is basically flat, printing and coloring can be performed easily and neatly.

According to the second aspect of the present invention, the strength is further enhanced by the core material, and the core material is biodegradable like the base, so that there is no problem in recycling or incineration.

According to the third aspect of the present invention, the flat stranded cord as the core material has a high tensile strength relative to the paper thickness because the direction of the fiber is complicated, and the base wraps the flat stranded cord. The strength can be greatly increased without increasing the thickness.

According to the fourth aspect of the present invention, the fiber direction of the base is complicated and the strength is further increased, and when the core material is sandwiched, the core material is stably wrapped in the base folded in the width direction. be able to.

According to the fifth aspect of the present invention, there are advantages that a high strength can be obtained while suppressing the thickness, and that the device can be manufactured at low cost.

According to the sixth aspect of the present invention, since a paper tube as a core material for winding is not required, troublesome waste is not generated, the weight is reduced, the transportation cost is reduced, and the manufacturing cost is reduced. Is also cheaper.

According to the seventh aspect of the present invention, it is possible to selectively use different colors and display items, so that the range of uses and functions is widened, and the form of the paper band of the present invention is basically flat. As there is no noticeable groove like a conventional paper band, not only display items such as characters and patterns,
Coloring can also be easily and neatly applied by a printing method.

[Brief description of the drawings]

FIG. 1 is an enlarged perspective view of a main part of a paper band according to a first embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a main part of a paper band according to a second embodiment of the present invention.

FIG. 3 is an enlarged perspective view of a main part of a paper band according to a third embodiment of the present invention.

FIG. 4 is an enlarged perspective view of a main part of a paper band according to a fourth embodiment of the present invention.

FIG. 5 is a diagram showing an example of a production line for a paper band according to the present invention.

6A to 6F are diagrams illustrating a process of processing a paper band manufactured by the manufacturing line illustrated in FIG. 5 in order from (A) to (F).

7 is a perspective view showing an example of a paper band finally wound into a coreless roll by the production line shown in FIG. 5;

[Explanation of symbols]

 T ... Tape 1 ... Paper band 3 ... Paper band 1 '... Base 5 ... Core material (flat twisted string) 11 ... Paper band 13 ... Core material 21 ... Paper band 23 ... Core material 39 ... Adhesive 55 ... Display items 79 ... Heat sealant 87 ... Core

Claims (7)

[Claims] 1. A paper band comprising a base formed in the form of a laminated flat cord by laminating a biodegradable paper tape, wherein the base is impregnated with a heat sealant. 2. The paper band according to claim 1, wherein a biodegradable core material is sandwiched between the base layers with adhesion. 3. The paper band according to claim 2, wherein the base is formed in a laminated shape by folding a biodegradable paper tape in the width direction, and the base is provided with a flat stranded cord as a core material and a main fiber. A paper band wrapped in a direction along the longitudinal direction of the base. 4. A paper band according to any one of claims 1 to 3, wherein the base is formed by folding a biodegradable paper tape in two in the width direction and bonding the tape to the base, and then folding the biodegradable paper tape into a plurality in the width direction. A paper band characterized by being adhered to. 5. The paper band according to claim 1, wherein the paper tape forming the base has a structure in which a long net kraft paper and a circular net kraft paper are bonded to each other. Characterized paper band. 6. A paper band according to claim 1, wherein one end of the paper band is wound into a cylindrical shape and solidified with an adhesive to form a winding core. A paper band, wherein the remaining portion is wound up in a roll shape around a core portion. 7. A paper band according to any one of claims 1 to 6, wherein a color or a display item of a color different from the color of the material is given to the base by a printing method.