JPH07157958A - Base cloth, tacky adhesive tape using the base cloth and their production - Google Patents

Abstract

PURPOSE:To obtain a base cloth, a tacky adhesive tape and their production process, especially to obtain a base cloth at a low cost by drawing a raw fabric having non-penetrated slits. CONSTITUTION:This base cloth, tacky adhesive tape produced by using the base cloth and their production process comprises the separate drawing of longitudinal and lateral raw fabrics 1, 1A having non-penetrated slits 4, the lamination of the drawn fabrics by welding with heat in a manner to cross the slits 4 each other to form a base cloth 30 and the application of a tacky adhesive layer to the cloth to obtain a tacky adhesive tape. The tacky adhesive tape can easily be cut by hand by forming slits on one or both of the drawn sheet for longitudinal use and the drawn sheet for lateral use.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base cloth, a pressure-sensitive adhesive tape using the base cloth and a method for producing the same, and more particularly to a stretched state of a raw fabric made of a sheet-like reticulated nonwoven fabric having a large number of non-penetrating slits. The present invention relates to a novel improvement for obtaining a base cloth and an adhesive tape using the base cloth at low cost by pressure bonding by heat welding.

[0002]

2. Description of the Related Art Conventionally, as a base cloth of this type and an adhesive tape using the base cloth, a base cloth is generally woven using a woven fabric and a cotton fabric, and an adhesive is applied to the base cloth. To form an adhesive tape. Further, as another conventional example, a pressure-sensitive adhesive tape using a base cloth made of a polyalkylene drawn yarn disclosed in Japanese Utility Model Publication No. 50-30362 and a synthetic resin disclosed in Japanese Patent Publication No. 1-41189. Adhesive tapes woven using threads made of flat yarn have been used.

[0003]

Since the conventional base cloth and the pressure-sensitive adhesive tape using the base cloth are configured as described above, there are the following problems. That is, in the case of the above-mentioned staple fabric and cotton fabric, the weaving work is expensive and it is difficult to increase the strength. In addition, the above-mentioned Japanese Utility Model Publication No. 50-30362 and Japanese Patent Publication No.
In the case of the plasticized yarn disclosed in Japanese Patent No. 41189/1992, since the mainstream of the yarn is to use drawn tape yarns, there is a problem in drawing drawn tape production, that is, lateral tear strength can be freely adjusted. The low denier yarn of warp yarns caused many yarn breakages, which made stable mass production difficult. Also, the lower the denier thread,
The low productivity of the loom became remarkable, and it was difficult to obtain an inexpensive base cloth.

The present invention has been made to solve the above problems, and in particular, a raw material made of a sheet-like mesh nonwoven fabric having a large number of non-penetrating slits is pressure-bonded by heat welding in a stretched state. It is an object of the present invention to provide a base cloth, an adhesive tape using the base cloth, and a method for producing them at low cost.

[0005]

A base cloth according to the present invention comprises a vertical main material having a large number of vertical non-penetrating slits and a vertical auxiliary material integrally provided on the vertical main material. A vertical stretched sheet obtained by stretching a raw material, a horizontal main material having a large number of horizontal non-penetrating slits, and a horizontal auxiliary material integrally provided on the horizontal main material. A horizontal stretched sheet obtained by stretching a raw fabric is provided, and the respective raw fabrics are pressure-bonded by thermal welding in a stretched state so that the directions of the non-penetrating slits intersect each other.

More specifically, the warp yarn and the weft yarn of each main material are 200 denier or less, the yarn width of each yarn is 0.5 mm or less, and the thickness of the warp yarn is less than the thickness of the weft yarn. It is a configuration.

More specifically, one or both of the warp threads and the weft threads of the warp stretch sheet and the weft stretch sheet have a cut in a direction intersecting with the slit.

The adhesive tape according to the present invention comprises a film laminated on one surface of the base cloth, and an adhesive portion formed on the other surface of the base cloth.

The method of manufacturing a base fabric according to the present invention comprises a vertical raw material comprising a vertical main material having a large number of vertical non-penetrating slits and a vertical auxiliary material integrally provided on the vertical main material. A longitudinal stretched sheet obtained by stretching with a longitudinal stretching device, a horizontal main material having a large number of horizontal non-penetrating slits, and a horizontal auxiliary material integrally provided on the horizontal main material. It is a method in which a horizontal stretched sheet obtained by stretching a raw material sheet with a horizontal stretching device is heat-welded with a laminating device in a stretched state so that the directions of the unpenetrated slits intersect each other. .

More specifically, the warp yarn and the weft yarn of each main material are formed to be 200 denier or less, the yarn width of each yarn is 0.6 mm or less, and the thickness of the warp yarn is formed to be the thickness of the weft yarn or less. Is the way to do it.

More specifically, it is a method in which one or both of the warp yarns and the weft yarns of the warp stretch sheet and the weft stretch sheet are formed by a roller type splitting device in a direction intersecting with the slit.

The method for producing an adhesive tape according to the present invention is a method in which a film is laminated on one surface of the base cloth and an adhesive portion is formed on the other surface.

[0013]

In the base fabric, the pressure-sensitive adhesive tape using the base fabric, and the method for producing the same according to the present invention, a sheet-shaped vertical raw fabric and a horizontal raw fabric having a large number of non-penetrating slits are stretched. To form a base fabric by pressing under pressure by heat welding and stacking so that the directions of the slits intersect each other, and further laminating a film on at least one side of this base fabric and forming an adhesive portion on the other side. The adhesive tape can be formed by the method. Further, by forming a cut in a direction intersecting with the slit in a roller type split device for one or both of the longitudinal stretched sheet and the transversely stretched sheet obtained by stretching, lower the tear strength in the cut direction, It can be easily cut.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the base cloth, the adhesive tape using the base cloth, and the manufacturing method thereof according to the present invention will be described below in detail with reference to the drawings. 1 and 2 are perspective views showing an original fabric, FIGS. 3 and 4 are perspective views showing respective original fabrics in a stretched state, and FIG. 5 is a perspective view showing a base fabric laminated by pressure bonding in a stretched state, FIG. 6 is a configuration diagram showing an adhesive tape, FIG. 7 is a perspective view showing another embodiment of a vertical stock, FIG. 8 is a perspective view of a main part showing another embodiment of a base cloth, and FIG. 9 is a manufacturing apparatus. A block diagram showing
FIG. 10 is a block diagram showing another embodiment of FIG.

In FIG. 1, reference numeral 1 denotes a vertical raw material, and the vertical raw material 1 has a vertical auxiliary material 3 made of a low-temperature-melting PP copolymer and a vertical auxiliary material 3 on the vertical auxiliary material 3. And a vertical main material 2 made of PP homopolymer. In addition, the horizontal raw fabric 1A shown in FIG.
A horizontal auxiliary material 3A made of P-copolymer and a horizontal main material 2 made of PP homopolymer formed on the horizontal auxiliary material 3A.
It is composed of A and.

The vertical main material 2 of the vertical web 1 has a thickness of 0.04 mm and has vertical non-penetrating slits 4 formed at a pitch of 0.8 mm. Original 1A
The horizontal main material 2A has a thickness of 0.1 mm and has horizontal non-penetrating slits 4A formed at a pitch of 0.8 mm.

Each of the above-mentioned original fabrics 1 and 1A is processed by the manufacturing apparatus 20 shown in FIG. In FIG.
Reference numeral 21 denotes a longitudinal stretching device for performing longitudinal stretching of the roll-shaped longitudinal raw fabric 1. This longitudinal stretching device 21
At a position below the horizontal position, a lateral stretching device 22, a laminating device 23, and a winding device 2 for laterally stretching the roll-shaped horizontal raw fabric 1A.
4 are provided. Further, the laminating device 23 includes
A vertical heating unit 25 made of rolls, a horizontal heating unit 26 made of a heater, and a pressure welding unit 27 by heat welding are provided, and a total of 1 is provided on the upstream side of the horizontal stretching device 22 and the downstream side of the laminating device 23. A pair of sandwiching portions 28 and 29 are provided and configured to apply tension to each of the original fabrics 1 and 1A located between the sandwiching portions 28 and 29.

Next, in the above-mentioned structure, each original fabric 1, 1A
The case where the base cloth 30 is manufactured by stretching the base material will be described. First, each of the roll-shaped original fabrics 1 and 1A described above is stretched by a longitudinal stretching device 21 and a lateral stretching device 22 shown in FIG.
When 0 is applied, the longitudinal stretched sheet 10 and the horizontal stretched sheet 10A are formed as shown in FIGS. 3 and 4, and the denier number of each warp yarn 11 of the longitudinal stretched sheet 10 is 90 to 105, Gap is 0.24 mm, and the width of each warp thread 11 is 0.5
It is 6 mm. In addition, each weft thread 11 of the stretched sheet 10A for weft
The denier number of A is 104, and the gap between each weft thread 11A is 0.
4 mm, and the width of each weft thread 11A is 0.4 mm.

Next, each of the semi-finished products 10 and 10A described above is sent to the pressure-bonding section 27 while being heated by the vertical heating section 25 and the horizontal heating section 26 in the stretched state.
When the auxiliary materials 3 and 3A of 10A are pressure-bonded and laminated by heat welding in a stretched state, as shown in FIG.
A base cloth 30 made of a 5 mm reticulated non-woven fabric is obtained.
The width of 1 is 0.56 mm, the vertical non-penetrating slit 4 is 0.24
mm. The width of each weft thread 11A is 0.4 mm, and the width of the non-penetrating slit 4A for weft is 0.4 mm. In addition, each FIG.
The arrow MD in FIG. 5 has shown the flow direction of the original fabrics 1 and 1A.

Next, the base cloth 30 is wound up by the winding device 24 to obtain a roll-shaped base cloth 30. Before the base cloth 30 is wound up, at least one surface thereof is laminated by a laminating machine (not shown). By laminating a film (not shown) and forming the adhesive portion 50 on the other surface by an attachment machine (not shown), the adhesive tape 40 shown in FIG. 6 can be obtained.

Next, the characteristics of the above-mentioned base cloth 30 are as follows. Warp yarn 11 denier 90 denier Weft yarn 11A denier 104 denier Longitudinal tensile strength 26 kgf / 5 cm Lateral tensile strength 35 kgf / 5 cm Longitudinal elongation strength 12.2% Lateral elongation strength 10.6% Lateral tear strength 1. 55 kg

Therefore, in the base cloth 30, the optimum base cloth 30 can be obtained under the condition that the warp yarn 11 and the weft yarn 11A are both 200 denier or less, the yarn width is 0.6 mm or less, and the warp yarn denier is not more than the weft yarn denier. You can

A well-known vertical / horizontal splitting device (not shown) for forming the slits 4 and 4A has a split pitch of 1.5 mm or less and a draw ratio of 2 to 5 times. When the thickness of 1A is set to 20 μ to 150 μ, it is possible to obtain a base cloth 30 which is easy to cut by hand and which has an appearance similar to that of a woven fabric, unlike the conventional case. Further, as shown in FIGS. 7 and 8, a large number of cuts 60 are formed in a direction orthogonal to the slits 4 of the warp yarns 11 of the stretched longitudinal stretching sheet 10.
When the roller-type split device 100 shown in 1 is formed at a pitch of about 1 mm, the completed base cloth 30 can have a direction in which it is easy to tear only in the lateral direction. The break 60 is not limited to the warp yarn 11 and can be applied to the warp yarn 11 or the weft yarn 11A after drawing or both.
Further, the depth of the cut 60 can adjust the degree of manual cutting. Further, in the above-described embodiment, the case where the roll-shaped prefabricated rolls 1 and 1A are used has been described. For example, as shown in FIG. 10, the vertical roll 1 is fed from the first extruder 101. Then, the horizontal original fabric 1A is supplied from the second extruder 102, and continuous in-line manufacturing can be performed. That is, each of the original fabrics 1 and 1A includes both the roll form and the in-line form. In FIG. 10, the same parts as those in FIG. 9 are designated by the same reference numerals and the description thereof is omitted.

[0024]

EFFECTS OF THE INVENTION The base fabric, the pressure-sensitive adhesive tape using the base fabric, and the method for producing them according to the present invention are constructed as described above, so that the following effects can be obtained. That is, the horizontal and vertical sheet-shaped horizontal and vertical raw fabrics formed by the splitting device are stretched, and in this stretched state, the base fabric is pressed and laminated by heat welding to each other. Since it is formed, compared to conventional woven fabrics and flat yarns, it is possible to easily produce a strong base fabric at a low cost, and it is possible to obtain a base fabric having epoch-making properties that do not exist in the past. . Moreover, an adhesive tape having good characteristics can be obtained by using this base cloth. Further, in the case of using the conventional staple fabric, cotton fabric or low denier tape yarn fabric, extremely low speed production (about 1 m / min or less, 1
However, according to the method and apparatus of the present invention,
High-speed and high-efficiency production of m / min x 1 unit is possible, and the production cost is also significantly reduced. About 50% (120PP / M ²
PP / M ² or less). Also, the tear strength, which is strengthened by the stretch orientation of the warp and weft, can be freely solved by forming a break in the yarn, which makes hand cutting very easy and lowers the tear strength than any plastic adhesive tape. It is possible to adjust the degree of hand cutting according to the depth of the cut. It goes without saying that the above-mentioned base cloth is not limited to the base cloth for the adhesive tape, but can be applied to other uses.

[Brief description of drawings]

FIG. 1 is a perspective view showing a vertical material web according to the present invention.

FIG. 2 is a perspective view showing a horizontal raw fabric according to the present invention.

FIG. 3 is a perspective view showing a longitudinal stretched sheet obtained by stretching the raw fabric of FIG.

FIG. 4 is a perspective view showing a horizontal stretched sheet obtained by stretching the raw fabric of FIG.

FIG. 5 is a perspective view showing a base cloth.

FIG. 6 is a side view showing an adhesive tape.

FIG. 7 is a perspective view showing another embodiment of the vertical stock of FIG.

8 is a partial perspective view showing a base fabric using the longitudinal stretched sheet of FIG.

FIG. 9 is a configuration diagram showing an apparatus for manufacturing a base cloth.

FIG. 10 is a configuration diagram showing another embodiment of FIG. 9.

[Explanation of symbols]

 1 vertical raw fabric 1A horizontal raw fabric 2 vertical main material 2A horizontal main material 3 vertical auxiliary material 3A horizontal auxiliary material 4 vertical non-penetrating slit 4A horizontal non-penetrating slit 10 vertical oriented sheet 10A Stretched sheet for weft 11 Warp yarn 11A Weft yarn 30 Base cloth 40 Adhesive tape 50 Adhesive part 60 Cut

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location D04H 3/14 Z 7199-3B

Claims (8)

[Claims] 1. A vertical main material (2) having a large number of vertical non-penetrating slits (4) and a vertical auxiliary material (3) integrally provided on the vertical main material (2). Longitudinal stretched sheet (10) obtained by stretching the longitudinal raw fabric (1), a horizontal main material (2A) having a number of horizontal non-penetrating slits (4A) and this horizontal main material (2A ) And a horizontal stretch sheet (10A) obtained by stretching a horizontal roll fabric (1A) consisting of a horizontal roll auxiliary material (3A) integrally provided with each of the roll rolls (1, 1A). Is a base cloth which is crimped by heat welding so that the directions of the non-penetrating slits (4, 4A) intersect each other in a stretched state. 2. A warp thread (11) and a weft thread (1) of each of the main materials (2, 2A).
1A) is 200 denier or less, the yarn width of each yarn (11, 11A) is 0.6 mm or less, and the thickness of the warp yarn (11) is less than that of the weft yarn (11A). The base cloth according to claim 1, which is characterized in that. 3. The warp yarns (11) and the weft yarns (11A) of the longitudinal stretched sheet (10) and the horizontal stretched sheet (10A) have a cut (60) in a direction intersecting with the slit. The base fabric according to claim 1 or 2, which is characterized. 4. A film laminated on one surface of the base cloth (30) according to claim 1, and an adhesive portion (50) formed on the other surface of the base cloth (30). An adhesive tape characterized by comprising: 5. A vertical main material (2) having a large number of vertical non-penetrating slits (4) and a vertical auxiliary material (3) integrally provided on the vertical main material (2). Longitudinal stretch sheet (10) obtained by stretching the longitudinal raw fabric (1) with a longitudinal stretching device (21), and a horizontal main material (2A) having a large number of horizontal non-penetrating slits (4A). This horizontal main material (2A)
The horizontal material (1A) and the horizontal auxiliary material (3A)
A) and a horizontal stretched sheet obtained by stretching in a horizontal stretching device (22) (1
0A), in the stretched state and each of the non-penetrating slits (4, 4
A method for producing a base fabric, which is characterized in that the laminating apparatus (23) press-bonds the sheets so that the directions A) intersect with each other. 6. A warp thread (11) and a weft thread (1) of each of the main materials (2, 2A).
1A) is 200 denier or less, and the yarn width of each yarn (11, 11A) is 0.
6 mm or less, and the thickness of the warp threads (11) is (1
The method for producing a base fabric according to claim 5, wherein the thickness is less than 1A). 7. The warp yarn (11) and the weft yarn (11A) of the longitudinal stretched sheet (10) and the horizontal stretched sheet (10A) are provided with a slit (60) in a direction intersecting with the slit (4). The roller type split device (100) is used for forming.
Or the method for producing the base fabric according to item 6. 8. A pressure-sensitive adhesive tape comprising a base film (30) according to claim 5, wherein a film is laminated on one surface of the base cloth (30), and an adhesive portion (50) is formed on the other surface. Production method.