JPH0551840A - Woven fabric for tacky adhesive tape - Google Patents

Abstract

PURPOSE:To obtain woven fabric for tacky adhesive tape having remarkably good cutting property by hand and beautiful cut cross section when used as tacky adhesive tape. CONSTITUTION:A polyester filament having a spin take up or spin draw take up and obtained by high speed spinning of especially >=4000m/min, preferably >=5000m/min is used as a warp of woven fabric used for woven fabric for tacky adhesive tape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adhesive tape fabric. More specifically, the present invention relates to a woven fabric for an adhesive tape, which is very easy to cut by hand and has a clean cut.

[0002]

2. Description of the Related Art In recent years, adhesive tapes have been widely used for packaging materials and for temporary shape retention in assembly work.
One of the required characteristics of such an adhesive tape is that it is easily torn in the width direction. BACKGROUND ART Conventionally, as a woven fabric for an adhesive tape, a rayon-spun spun yarn or vinylon fiber is used for a warp and a weft. Both of them are easily torn in the width direction, but thickness unevenness is likely to occur in the woven fabric, and the amount of the resin as the adhesive attached tends to be excessive. Further, there is a problem that the adhesive tape, which has a lower strength and a higher elongation when wet, has poor hand tearability as compared with when it is dry. As described above, in the conventional technique, among the physical properties of the raw yarn used for the warp of the adhesive tape base fabric, the strength and the elongation are optimized to improve the hand tearability of the resulting adhesive tape. ,
The effect is not always sufficient only by such means. In recent years, various fabrics for thin adhesive tapes have been proposed in which polyester multifilaments are used for warp and weft in order to solve such problems.

For example, in JP-A-58-91845, a polyester multifilament used for a warp yarn is subjected to a secondary processing in order to impart a hand-cutting property, which is one of the required characteristics of an adhesive tape, and the adhesive tape is Reduce strength and elongation beforehand so that it can be easily torn by hand, or
An adhesive tape has been disclosed in which a polyester multifilament using a special polymer as a warp is used to reduce strength and elongation by heat treatment during a manufacturing process of the adhesive tape.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a base cloth for an adhesive tape, which has good hand-cutting property and has a clean cut.

[0005]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies on the above-mentioned problems of the conventional technique, and as a result, have found that the warp of the base fabric for the adhesive tape is particularly 4000 m / min or more, preferably The present inventors have found that the hand tearability of an adhesive tape is greatly improved by using a spin take-up or spin draw take-up polyester filament obtained by high-speed spinning at 5000 m / min or more, and reached the present invention.

That is, the present invention is a textile for an adhesive tape, characterized in that the warp is a polyester filament of spin take-up or spin draw-up obtained by high-speed spinning at 4000 m / min or more,
Is. Hereinafter, the present invention will be described in more detail. The adhesive tape woven fabric of the present invention has a warp of particularly 4000 m / min or more,
It is necessary that the polyester filament is preferably a spin take-up or spin draw-up polyester filament obtained by high-speed spinning at 5000 m / min or more.

Particularly, the total fineness of the spin-take-up or spin-draw take-up polyester filaments obtained by high-speed spinning at 4000 m / min or more, preferably 5000 m / min or more is preferably 30 to 150 denier. , And more preferably, the total fineness is 50 to
The range is 80 denier, and the single yarn fineness is preferably 1 to 3 denier.

When the warp density of the adhesive tape woven fabric is 40 to 80 yarns / inch, if the denier is less than 30 denier, the strength of the base cloth becomes low, and problems such as warp breakage occur in the base cloth manufacturing process, which enables stable weaving. It can be difficult. Also, 15
If it exceeds 0 denier, the tear strength of the reversely formed adhesive tape tends to be too high or bulky. The woven structure of the adhesive tape base fabric is not particularly limited, but a flat structure is preferable from the viewpoint of production cost and workability of the adhesive tape base fabric.

In some applications of the adhesive tape, the adhesive tape is used in an environment where there is a change in humidity (in rainy weather and fine weather), such as outdoor assembly work. In such a case, an adhesive tape obtained by using a highly hygroscopic material such as recycled fiber or semi-synthetic fiber as the fiber type used for the warp not only has poor dimensional stability, but also has high strength / elongation when wet. The lowering of the value makes it difficult to tear and the workability becomes poor.

For the above problems, 4000
Spin take-up or spin draw take-up polyester filaments obtained by high-speed spinning of m / min or more, preferably 5000 m / min or more do not cause changes in physical properties such as strength and elongation when wet, and
It is superior to being relatively hard to absorb moisture. The fiber type of the weft used in the present invention is not particularly limited, but it is preferably selected according to the manufacturing process of the adhesive tape and the intended use of the resulting adhesive tape.

For example, a pressure-sensitive adhesive tape is generally manufactured by laminating a polyethylene film or the like on the front side of a base cloth and further applying an adhesive on the back side. In order to improve the adhesiveness between the base fabric and the polyethylene film during the laminating step, spun yarn, particularly open-end spun yarn is preferably used. In particular, acrylic spun yarn is excellent in adhesiveness with a polyethylene film.

The fineness of the spun yarn used for the weft in the present invention is preferably in the range of 70 to 200 denier when converted to denier. If it is less than 70 denier, problems such as the longitudinal direction of the resulting adhesive tape, that is, the weft of the base fabric is likely to break (key tearing phenomenon), or conversely, if it exceeds 200 denier, the adhesive tape tends to be bulky. is there. or,
When used for building curing such as outdoor assembly work, it is preferable to use a polyester filament excellent in strength, durability and dimensional stability. Especially 4000
When spin take-up or spin draw take-up polyester filaments obtained by high-speed spinning of m / min or more, preferably 5000 m / min or more are used, pressure air is used when producing an adhesive tape fabric using an air jet loom. It is preferable in that the amount used can be reduced. The total fineness of the polyester filament is 60 to 20.
A range of 0 denier is preferred. If it is less than 60 denier, a key splitting phenomenon may occur, and if it is more than 120 denier, it tends to be bulky.

Hereinafter, the present invention will be described in more detail with reference to Examples. The product evaluation of the adhesive tape was performed by the following method. The tear strength of the product refers to the strength when the warp yarn for the adhesive tape is cut and torn, and the tear strength of the product was measured based on JIS L-1079 using an Elemendorf tear tester (manufactured by Shimadzu Corporation). The hand-cutting property is the adhesive tape test piece (width 5 cm, length 15
(cm) end portion (3 cm) was stuck and fixed, and the easiness of cutting when cut by hand, and the presence or absence of occurrence of thread fraying and hook splitting were evaluated according to the following criteria.

◯: It can be cut extremely easily, and does not cause thread fraying or key tearing. Δ: Tear by hand, but a key tear occurs. ×: It is hard to tear by hand, and if you tear it forcibly, the thread will fray,
A key split occurs.

[0015]

【Example】

[0016]

Example 1 A polyester fiber having a total fineness of 75 denier, 36 filaments, and a spin draw-up polyester filament (trade name: TEC, manufactured by Asahi Kasei Co., Ltd.) obtained by high-speed spinning at a spinning speed of 7300 m / min was used as a warp. Fineness 100 denier 48 filament, spinning speed 520
An air jet loom with a polyester filament (made by Asahi Kasei Kogyo Co., Ltd., trade name: RSD) obtained by high-speed spinning at 0 m / min as the weft and a weaving density of 55 yarns / inch in the warp direction and 45 yarns / inch in the weft direction. (Tsudakoma ZA-100 type) was woven.

Using the obtained woven fabric as a base fabric, a thickness of 50
A micron polyethylene filament was melt extruded and laminated on the front side of the base fabric for lamination. Further, a release agent was applied to the front side of the base cloth and an adhesive was applied to the back side to prepare an adhesive tape. The adhesive tape thus obtained was evaluated for product physical properties such as tenacity, elongation, and tear strength, as well as hand-cutability and the cut end, and as a result, the tenacity was 1
5.8 kg, elongation 13.2%, tear strength 109.9
It was g. Further, this adhesive tape could be easily torn by hand, and no thread fraying occurred, and the cut end was very clean.

The results are shown in Table 1.

[0019]

Example 2 1/52 Nm (equivalent to 170 denier in total fineness) 2 denier 38 mm acrylic open end spun yarn was used as weft, and weaving density was 48 warps / inch in warp direction and 41 wefts / inch in weft direction. An adhesive tape was prepared in the same manner as in Example 1 except for the above.

The physical properties of the adhesive tape thus obtained, the hand-cutting property, and the cuts were evaluated,
Strength is 15.3 kg, elongation is 13.0%, tear strength is 1
It was 05.3 g. Further, this adhesive tape could be easily torn by hand, and no thread fraying occurred, and the cut end was very clean.

The results are shown in Table 1.

[0022]

[Comparative Example 1] A pressure-sensitive adhesive tape was prepared in the same manner as in Example 1, except that a regular regular polyester filament having a total fineness of 75 d was used as a warp and a regular regular polyester filament having a total fineness of 100 denier was used as a weft. A woven fabric and an adhesive tape were prepared.

With regard to the physical properties of the obtained adhesive tape, the strength was 26.1 kg, the elongation was 14.2%, and the tear strength was 183.3 g. Further, as a result of evaluation of hand-cutting property, it was possible to tear by hand, but many thread frays were generated, and the cuts were sawtooth-like. The results are shown in Table 2.

[0024]

Comparative Example 2 An adhesive tape base cloth and an adhesive tape were prepared in the same manner as in Comparative Example 1 except that a vinylon filament having a total fineness of 70 d was used for the warp. With regard to the physical properties of the obtained adhesive tape, the strength was 17.0 kg, the elongation was 11.2%, and the tear strength was 153.1 g.

Further, as a result of evaluating the hand-cutting property, it was not satisfactory because the film could be easily torn, but many yarn frays occurred. The results are shown in Table 1.

[0026]

[Table 1]

[0027]

EFFECT OF THE INVENTION The adhesive tape using the adhesive tape woven fabric of the present invention has a very good hand-cutting property when tearing by hand as compared with the conventional one, and the cut end is also clean. is there.

Claims (1)

[Claims] 1. A woven fabric for pressure-sensitive adhesive tapes, wherein the warp is a polyester filament of spin take-up or spin draw-up obtained by high-speed spinning at 4000 m / min or more.