JP2008297014A - Paper band - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new paper band which has a sufficient tensile strength and does not generate a harmful substance as a synthetic resin when incinerated and allows printing to be beautifully applied to and is easily wound in a roll shape without using a paper tube. <P>SOLUTION: The paper band 3 has a base 1' which is formed into a laminated flat strip shape by bonding paper tapes T with an adhesive 39. A core part 87 for winding is formed by winding one end side of the paper band 3 and solidifying it with the adhesive 39. The rest part of the paper band is wound around the core part 87 in a roll shape. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a paper band, and more particularly to a flat string-like paper band used for packing, binding, and the like.

  Conventionally, there are several types of wrapping bands. For example, when a newspaper to be transported is bound or a cardboard box in which products are stored is banded, it is called a so-called “PP band”. Synthetic resin bands are often used. This band has an advantage that it has a high tensile strength in the longitudinal direction and can be easily bound by a heat sealing (thermal binding) method.

  However, this PP band is almost impossible to use for recycling, and has the disadvantage that disposal after use is extremely difficult, such as generation of harmful substances such as dioxin when burned. Moreover, the PP band is usually provided in the form of a roll wound around a paper tube (core) made into a cylindrical shape by liner base paper, and this paper tube depends on the size and winding length of the PP band. Because the wall thickness is extremely strong, about 10 millimeters, disposal of this paper tube is also a problem, and the weight of the paper tube (about 1 kilogram) is added, which increases the distribution cost. There was also a problem that it would end up. Since the amount of PP bands used in Japan is enormous, it will be very expensive to continue to dispose of used bands and paper tubes safely in the future.

  In this respect, a paper band formed of pulp paper, waste paper, or the like is easy to recycle, and even when burned, no particularly harmful substance is generated. However, since the conventional paper band is only one in which 5 to 6 paper strings are arranged and bonded to each other, the tensile strength is not necessarily high. For this reason, the range of use is limited, and as a means for binding, it is necessary to bind or crimp through a metal caulking tool. This increases the cost of packaging and leaves a problem that disposal of used caulking tools is costly.

  Therefore, the present inventor considered that heat sealing can be achieved by impregnating a conventional paper band with a heat sealing agent. However, since the thickness of the paper band is about 1 to 1.5 millimeters, it cannot be adapted to the existing heat sealing apparatus for PP band. Will need to be developed or purchased. In addition, the cost of the conventional paper band is five to six times higher than that of the PP band, which further increases the packaging cost.

  In addition, in order to make the paper band as easy to use as the PP band, various colors must be prepared. However, the color paper that is mass-produced today has a problem of waste liquid treatment, etc. It is limited to weak “colored quality paper”, and as a material to make a paper band with the same strength as PP band, there is no reality, and high strength craft paper and liner base paper are only brown and white at present is there. Therefore, 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. Printing is actually impossible.

The present invention has been made in view of the above-described conventional problems, has a sufficient tensile strength, does not generate harmful substances even when incinerated, and performs printing neatly. It is an object of the present invention to provide a novel paper band that can be easily rolled up without using a paper tube.

The invention of claim 1 is a paper band having a base formed in a laminated flat string shape by laminating a paper tape with an adhesive, and winds one end side portion of the paper band and hardens it with the adhesive. Thus, a winding core portion is formed, and the remaining portion is wound around the core portion in a roll shape.
According to a second aspect of the invention, in the first aspect of the invention, a core material is wrapped around the base together with an adhesive.
According to a third aspect of the invention, in the first or second aspect of the invention, the base is further impregnated with a heat sealant.

  Therefore, since this paper band can be heat-sealed (thermally bonded), it does not take time for 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 suppressed to a level suitable for an existing heat seal device for PP band. Therefore, it has a great practical effect that it is possible to use an existing heat seal device as it is. Naturally, the tightening force can be selected in a wide range within the paper cutting limit.

  And since the material of this paper band is biodegradable at least in the base, it can be easily recycled into recycled paper, and no harmful substances are generated like synthetic resin even when incinerated. 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, since the surface of the paper band according to the present invention is basically flat, not only coloring but also display items such as letters and pictures can be easily and cleanly imparted by the printing method. The type of ink used for this printing is rarely restricted, but when water-based ink is used, the ink ride becomes worse after impregnating the heat sealing agent. It is desirable to carry out in the process before impregnation.

  As a kind of the material of the present invention, a pulp paper, that is, a wood pulp (mechanical pulp, semi-chemical pulp, chemical pulp) or non-wood, except for a kind containing a component that does not biodegrade such as synthetic paper Almost all materials such as pulp, paper made of biodegradable plastic fibers, or waste paper can be used. However, in order to obtain sufficient strength even if the number of stacks is low, for example, kraft pulp It is desirable to use wrapping paper such as (KP) paper.

  Several means can be considered as means for increasing the strength of the paper band according to the present invention. However, the present inventor does not use a material that does not biodegrade, and does not impair the flat string-like shape required for the band. In addition, as a result of various tests, the tape as the base material was folded and laminated in multiple layers in the width direction, and the base layer was made of paperboard, flat twisted string, hemp string, etc. It has been found that the structure sandwiched as a material can provide strength not inferior to PP bands.

  As a concrete structure of the former (a structure that folds while bonding), a structure in which several thin tapes are simply bonded together may be used, but a structure in which a single tape is folded several times in the width direction is completed. There is a tendency that the fiber direction of the base becomes more complicated and the strength increases. Since the strength increases as the number of folds in this fold structure increases, the desired number of folds cannot be specified. However, when manufacturing a band with a load resistance of about 50-60 kg without a core material, fold the tape in two. It is sufficient that the adhesive is further folded into two or three after the bonding. Further, this folding structure has a great advantage that when a paper band with a core material is manufactured, the core material can be stably wrapped and easily automated.

  For the paperboard used as the core material, for example, a liner or a corrugated cardboard may be used. The thickness of this paperboard should also be selected according to the strength required of the band. As an example, when a 400 gram / square meter liner is used as the core, a load resistance of about 100 kilograms can be obtained. I understood. Moreover, when a flat twisted string is used as the core and the main fiber direction is wrapped along the longitudinal direction of the base, the tensile strength can be made extremely high. This configuration has an advantage that high strength can be obtained while being inexpensive.

  The present invention can provide sufficient strength even with a base-only structure without a core material, but when the tape itself forming the base has a structure in which a long kraft paper and a circular kraft paper are bonded together, Even without a core material, it can have a high strength that can withstand a load of about 100 kilograms. This structure has the advantage that it can be manufactured at low cost, 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, an adhesive is impregnated as necessary, and it becomes easy to wind up in a coreless form using this adhesive. That is, when winding the paper band in a roll shape, a heating roller is used as a temporary winding core material, and the paper band is wound around the heating roll while applying water to the winding start portion (one end side portion). If this is the case, the adhesive impregnated in the base and core is activated by moisture and high heat, and the overlapping surfaces adhere to each other and harden into a cylindrical shape. ). Of course, even when winding in a coreless manner as described above, an adhesive may be applied to the winding start portion.

  Below, the paper band which concerns on this invention is demonstrated according to each embodiment shown on drawing.

[A. First Embodiment] (See FIG. 1)
FIG. 1 shows a paper band 1 according to the first embodiment of the present invention, which has a base-only structure without a core material. This paper band 1 is made of kraft paper tape T having a width of about 65 millimeters (the thickness of the tape is exaggerated in the drawing), and the tape T is folded and bonded so that a total of six sheets are stacked. It is. Specifically, the tape T as a material is first folded in two in the width direction and the mating surfaces are bonded, and then the overlapping surfaces are bonded while being folded in three in the width direction. Therefore, the six layers overlapped with each other over the entire surface. A specific type of kraft paper is 50 g / sq.m.

  As a result of being folded and bonded in this way, the tape T as a raw material has a width of about 11 millimeters (10 to 15 millimeters depending on the thickness and processing conditions of the tape T used) and a thickness of about 0.5 millimeters (use Depending on the thickness of the tape T to be processed and the processing conditions, it becomes a flat string with a firmness of about 0.4 to 0.8 mm. This is the base. The base is impregnated with a heat seal agent and then dried. When the paper break test was performed on the paper band 1 configured as described above, the paper band 1 generally withstands a static load of 60 kg.

  In addition, although not shown in the figure, when the tape T is a laminate of long net kraft paper (pulp 100%) and circular net kraft paper (remaining paper 100%), even with only the base without the core material, In general, it withstood a static load of 100 kg.

[B. Second Embodiment] (FIG. 2)
FIG. 2 shows a paper band 3 according to the 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 used as an outer skin and a core material is wrapped around the base. Therefore, the description will be made only on this difference, and the description of the base will be omitted by giving the reference numeral 1 'in the drawing. The usage and meaning of such symbols are the same in the third and fourth embodiments described later.

  In the paper band 3, a flat twisted string is used as the core material 5. The core material 5 is wrapped in the base 1 ′ in a state where the main fiber direction is along the longitudinal direction of the base 1 ′, and the wrapping structure is such that the tape T which is the material of the base 1 ′ is folded in two. After being folded, the base 1 'is joined when folded in three. Accordingly, the core material 5 is entirely wrapped in the base 1 'and bonded to the base 1'. As a result of performing a paper break test on the paper band 3 configured as described above, the paper band 3 generally withstands a static load of 80 kg.

[C. Third Embodiment] (FIG. 3)
FIG. 3 shows a paper band 11 according to the third embodiment of the present invention. The paper band 11 has a base 1 'as an outer skin, and a core 13 made of a liner of 180 grams / square meter or a liner of 400 grams / square meter is wrapped around the base 1'. The wrapping structure of the core material 13 in the base 1 ′ is similar to the core material 5 in the paper band 3 when the tape T, which is the material of the base 1 ′, is folded in two and then folded in three. It has a united structure. Therefore, the core material 13 is also entirely wrapped in the base 1 'and bonded to the base 1'.

  When the paper band 11 was subjected to a paper cutting test, the core material 13 with a 180 gram / square meter liner generally withstands a static load of 70 kg and the 400 gram / square meter liner with the core material 13. About what was done, it endured to 100 kilograms of static loads.

  Although not shown, a paper band in which the above two types of liners (180 gram / square meter liner and 400 gram / square meter liner) are bonded together to form a core material and the core material is wrapped in a base 1 ′. In addition, when a paper cutting test was conducted, it was confirmed that it could withstand a static load of about 120 kilograms.

[D. Fourth Embodiment] (FIG. 4)
FIG. 4 shows a paper band 21 according to the fourth embodiment of the present invention. The paper band 21 uses two hemp strings having a thickness of about 0.5 mm as the core material 23. The core members 23 are arranged at a certain interval so that the tape T, which is the material of the base 1 ′, is folded into two and then folded into three. Yes. Therefore, the core material 23 is also entirely wrapped in the base 1 'and bonded to the base 1'. When this paper band 21 was subjected to a paper break test, it generally withstood a static load of 80 kg. Therefore, it seems that the hemp string core material 23 has an effect of increasing the strength at a rate of about 10 kilograms per piece.

  It is also conceivable to further increase the strength by using the core material 23 made of hemp string as the core material of the paper band 3 or 11 containing the core material. For example, in the paper band 3 of FIG. 2, the hemp string 23 is used as a core material in a form in which the hemp string 23 is wrapped around the flat twisted string 5 as indicated by a two-dot chain line. Of course, the hemp string 23 may also be used in combination with the paper band 11 whose core material is paperboard.

[E. Manufacturing method] (FIGS. 5 to 7)
Next, an example of a method for producing a paper band according to the present invention will be described taking as an example a case where the paper band 3 is colored and wound 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 the material is wound was attached with a valley fold line 35 (see FIG. 6A) at the intermediate position in the width direction of the lower surface by the creasing roller 33. Thereafter, an adhesive 39 (shown as a satin pattern in FIG. 6) is applied to the entire surface by the contact of the glue roller 37 with the lower surface thereof. As this adhesive, PVA (commonly called “Poval”) was used for the time being. However, it is desirable to use a biodegradable type, for example, “starch glue”. Highly degradable properties can be obtained. Next, the tape T is passed through the folding guide 41 so as to be folded in two as shown in FIG. 6B, and in this state, passed through the printing unit 43.

  The printing unit 43 includes an ink vat 45 that stores ink of a desired color, an ink roller 47 that is partially immersed in the ink, an anix roller 49 that is in contact with the ink roller 47, and a plate that rotates in contact with the ink roller 47. The tape T, which includes the roller 51 and the like and is folded in two, is colored by transferring the ink in the ink vat 45 when the upper surface of the tape T comes into contact with the plate roller 51. The region 53 to which the ink has been transferred is indicated by a broken parallel line in FIG. This region 53 is a region that is approximately two-thirds closer to one side in the width direction of the tape T folded in two. The plate roller 51 is loaded with an axial length size that matches the width of this region 53. The travel path of the tape T in the printing unit 43 is guided so that the plate roller 51 comes into contact with the region 53.

  In addition to coloring, the display item 55 (an example in which kanji is printed on (C) in FIG. 6) is also printed on the tape T. Print the pattern.

  The tape T exiting the printing unit 43 is passed through the drying unit 61 to dry the adhesive 39 and the ink. The drying unit 61 includes three sets of heating rollers 63 arranged along the feeding direction of the tape T, and the tape T is in contact with the heating roller 63 to dry the adhesive 39 and the ink. The temperature of the three sets of heating rollers 63 is set to be lower in order toward the rear one. Upon exiting the drying section 61, the pressure roller 65 is passed through, and the state of being bonded in two folds is firmly fixed by this pressure.

  Next, the tape T in a state of being folded in two is attached in parallel with two valley fold lines 71 (see FIG. 6D) on the lower surface by another creasing roller 33 ′. The valley line 71 is attached at a position that divides the lower surface into three equal parts in the width direction. Then, the laminating roller 37 ′ is brought into contact with the lower surface so that the backing agent 39 is applied to the entire lower surface, and then the folding guide 75 for folding in three is passed. At this time, the core material 5 (flat twisted string) is joined to the lower surface of the tape T. That is, as shown in FIG. 6D, the core material 5 is joined to the area between the two valley fold lines 71 on the lower surface of the tape T, and the folding guide 75 is passed through in this state. As a result, the tape T is wrapped around the core material 5 while being folded in three in the order shown in FIGS. 6E to 6F.

  As a result of this folding, the tape T has a structure in which the core material 5 is wrapped and adhered in a stack of six sheets, and the width is approximately one-sixth of the original width of the tape T. Has the color of the ink used in the printing unit 43.

  The adhesive 39 is dried by the tape T and the core material 5 exiting the folding guide 75 being passed through the drying unit 61 ′, and then the heat sealing agent 79 is impregnated by being immersed in the heat sealing tank 77. Then, after passing through the drying section 61 "again to dry the heat sealant 79, it is passed through the pressure roller 65 ', and by this pressurization, the state of being bonded in three is firmly fixed. Then, a paper band 3 wrapped with the flat twisted cord 5 and impregnated with the heat sealant 79 and colored in the desired color is completed.

  The paper band 3 is wound up in a roll shape in a coreless manner at the winding portion 81. The winding unit 81 includes a winding roller 83 with a built-in heater, a level winder (not shown) that reciprocally moves the winding position of the paper band 3 wound around the winding roller 83 left and right, and this level An adhesive water spray nozzle 85 supported by a winder is provided. The winding roller 83 is divided into, for example, four parts in the circumferential direction and has a structure capable of expanding and contracting the diameter. The adhesive water spray nozzle 85 is configured to apply water or water to the paper band 3 wound around the winding roller 83. Spray the adhesive.

  The paper band 3 is wound by rotating the roller 83 in a state where one end of the winding side is locked to the winding roller 83 and spraying water or an adhesive from the adhesive water jet nozzle 85 onto the paper band 3. Start. As a result, the paper band 3 is wound around the take-up roller 83 in a cylindrical shape, and when the take-up is performed twice or triple, the spraying of water or adhesive is finished. Accordingly, the winding start portion of the paper band 3, that is, the portion wound with water or an adhesive and wound into two or three cylinders is hardened by the sprayed adhesive or the skin 1 The adhesive applied to the core material 5 is activated and hardened by sprayed water or the like and the heat of the winding roller 83, and the solidified portion is the winding core 87 (see FIG. 7). Is made. The remainder of the core portion 87 is wound into 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, the supply of the core material 5 when the folding guide 51 for folding is passed may be omitted, and the paper bands 11 and 21 may be used. In the case of manufacturing, the liner 13 and the hemp string 23 may be supplied as a core material when the folding guide 51 for folding in three is passed.

  As mentioned above, although various embodiment of this invention was described, the concrete structure of this invention is not limited to these embodiment, All the forms provided with the summary of this invention are included in this invention. . For example, regardless of the presence or absence of the core material, the base structure may be a structure in which a number of thin tapes are simply bonded.

  As described above, in the paper band according to the present invention, since the base is a laminated form of several laminated structures, sufficient tensile strength can be given without increasing the thickness. In addition, since it can be thermally bonded, packaging does not take time and no special binding member such as a crimping tool is required. And since all or most of the material of the paper band is biodegradable, it can be easily recycled into recycled paper, and no harmful substances are generated like synthetic resin even when incinerated. . Moreover, 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 cleanly.

According to the present invention , since a paper tube as a core material for winding is not required, troublesome waste is not required, the weight is reduced, the transportation cost is reduced, and the manufacturing cost is reduced.

It is the perspective view which expanded the principal part of the paper band which concerns on 1st embodiment of this invention. It is the perspective view which expanded the principal part of the paper band which concerns on 2nd embodiment of this invention. It is the perspective view which expanded the principal part of the paper band which concerns on 3rd embodiment of this invention. It is the perspective view which expanded the principal part of the paper band which concerns on 4th embodiment of this invention. It is a figure which shows an example of the manufacturing line of the paper band which concerns on this invention. It is a figure which shows the process of a paper band manufactured with the manufacturing line shown in FIG. 5 in order from (A) to (F). It is a perspective view which shows an example of the paper band finally wound up by the production line shown in FIG. 5 in the coreless roll shape.

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 79 Heat Seal Agent 87 Core

Claims (3)

A paper band having a base formed into a laminated flat string by laminating paper tape with an adhesive,
A paper band in which one end side portion of the paper band is wound and hardened with the above-mentioned adhesive to form a winding core, and the remaining portion is wound around the core in a roll shape . The paper band according to claim 1, wherein a core material is wrapped with an adhesive on the base . The paper band according to claim 1 or 2, wherein the base is impregnated with a heat sealant .

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