JPH0733627B2 - Thermoplastic resin connecting tapes and manufacturing method thereof - Google Patents

Description

TECHNICAL FIELD The present invention relates to tapes used when knitting or netting knitted fabrics such as regier mats or ropes, and a method for producing the same, and The present invention relates to connecting tapes that can be connected without splitting and separating until a winder (winding) is performed, but can be easily divided into appropriate widths at the time of warping and the like, and a method for producing the same.

[Conventional technology]

The tapes described above are generally manufactured by the process shown in FIG. That is, first, the film is extruded by a T-die method or an inflation method [reference numeral 1 in FIG. 6], divided into appropriate widths (slits) [reference numeral 2 in FIG. 6], and then stretched at an appropriate temperature. [Reference numeral 3 in FIG. 6]
It is obtained by annealing (heat setting) [reference numeral 4 in FIG. 6] and winding (winder) [reference numeral 5 in FIG. 6].

FIG. 7 shows an example of a stretched tape manufacturing apparatus using the T-die method. In FIG. 7, 6 is an extruder, 7 is a T die, 8 is a stretched tape manufacturing apparatus, and 9 is a winding machine. In such a tape manufacturing process, for an unstretched film, for example,
Install a number of slitting blades at regular intervals to slit,
A method is used in which a stretched tape is manufactured by a stretched tape manufacturing apparatus and is wound one by one.

This will be schematically described with reference to FIGS. 8A and 8B. Each of the slit films 10 before stretching is stretched and the stretched tape is guided by the traverse guide 11. The method of winding each on a bobbin (weight) 12 is adopted.

Therefore, it is necessary to prepare bobbins according to the number of slits of the film that has been slit, and for example, if the number of slits is 120, 120 bobbins are required, and 1000
For a stretched tape, 1000 bobbins must be prepared.

As described above, since a large number of bobbins are required in the conventional tape manufacturing process, it is necessary to secure a large winder installation area. In addition, since the bobbin is expensive, the winder process is too expensive, and the cost of the woven fabric and the like is inevitable.

On the other hand, in the case of forming a knitted fabric, for example, the tape (s) 13 are knitted into a knitted fabric 16 such as a regier mat through a warping step 14 and a weaving step 15 as shown in FIG. However, the effect of performing the winding depending on the number of tapes as described above also affects the warping step 14 in the knitting and weaving step. That is, each warp tape wound on a large number of bobbins must be manually lifted and installed on a creel stand in order to warp the bobbins. However, the effort is very difficult. Further, it is necessary to prepare a required number of creel stands and their weights according to the number of warp threads, and when the number of bobbins is large, the installation space of the creel stands must be large.

Although not shown, in the warping step, the stretched tape from the creel stand is separated by the warp plow,
It is wound on a beam and then transferred to a weaving process on a loom.

[Problems to be solved by the invention]

(1) An object of the present invention is to provide a connecting tape which can be connected until it is necessary, but can be released after that, so that the tape can be wound. It is an object of the present invention to provide a technique capable of reducing the number of winders as compared with conventional ones, saving labor in the warping process, and further reducing the number of bobbins and the installation space of a creel stand.

Other objects and novel features of the present invention will be apparent from the description of the entire specification and the accompanying drawings.

[Means for Solving Problems] and [Action] The present invention is a tape that can be used as a binding tape for knitted fabrics or ropes, and in the length direction of the tapes, a slit line and a slit line In between, 1 or 2 or more threads are not penetrated in the thickness direction t / T = 0.0
1 to 0.5 (where T is the thickness of an unstretched film or a stretched tape, and t is the depth of cut) and a cutting line having alternating through portions penetrating in the thickness direction,
Although it is continuous until necessary, it exists in thermoplastic resin connecting tapes that can be split and separated along the cutting line as needed, and the present invention also includes a film forming step, a slit step, a stretching step, and an annealing step. When manufacturing a tape that can be used as a knitted fabric or a binding tape for a rope, which comprises a process including a winder process and a winder process, an unstretched film or a stretched tape that has been extruded has a notch and a thickness that do not penetrate in the thickness direction. The needle blade roll or the saw blade roll or the elliptical blade equipped with a cutting blade in the middle, which can alternately form the penetrating portion that penetrates in the direction, does not penetrate in the thickness direction of one or two or more threads. t / T = 0.01 to 0.5 (where T is the thickness of unstretched film or stretched tape, t
Is a cutting depth) and a cutting line having alternating through portions penetrating in the thickness direction is formed between the slit line and the slit line. A method for producing a thermoplastic resin connecting tape, which can be split and separated along the cutting line, if necessary.

The operation of the present invention will be described together with its representative example. In the present invention, for example, at the time of slitting an unstretched film extruded from a T-die, a needle blade roll having a needle protruding is provided between the slit blade and the slit blade. Then, the needle blade roll is brought into contact with the film, and a notch that does not penetrate the film in the thickness direction and a penetrating portion formed by the tip of one sewing needle are made in the film, and after stretching, the film is wound. At that time, the depth of the incision is set so as not to be split and separated until the tape is wound, and then the warping step is performed.

In the warping step, the drawn tape is separated into a number corresponding to it by the warp and the drawn tape is split and separated at the cut and the through due to the presence of the cut and the through, and the warp passes through the warp. And is wound into a beam.

Therefore, according to the conventional example, in order to warp such 400 warps, it is necessary to have slits of undrawn film to be 400, and in the case of a winder, the number of bobbins corresponding thereto is required, so 400 warps are required. A bobbin is required, but in the present invention, 200
The number of bobbins is sufficient, the number of bobbins is reduced, and the number of winders and its installation space are small. Moreover, since the number of bobbins is reduced by half, the lifting labor to the creel stand is reduced, the number of weights of the creel stand is also reduced, and the installation space thereof is small.

Next, the configuration of the present invention will be described in detail with reference to the drawings as appropriate.

As shown in FIGS. 1 and 2, the tapes according to the present invention have a notch 17 and a penetrating portion which do not penetrate in the length direction thereof.
18 and 18 are alternately formed.

The cuts 17 and the penetrating portions 18 are alternately formed on the unstretched film after being extruded by a T-die or the like. 1 and 2 show the film 19 before stretching, and the penetrating portion 18 is elongated vertically by stretching.

In the alternate formation, for example, an unstretched film is brought into contact with a cutter roll 22 having a needle blade 21 between the cutter blade 20 and the needle blade 20 as shown in FIG. 3 between the slit blade and the slit blade. It can be formed by That is, with the progress of the film in the length direction, the roll 22 rotates, the tip of the needle blade 21 penetrates the film, and a penetrating portion 18 formed of a through hole is formed in the film. A notch 17 that does not penetrate in the thickness direction of the film is formed by a blade 20 between the needle blade 21 and the needle blade 21.

These alternating formations may be performed before the slit, but it is better to perform them at the same time as the slit.

In FIG. 1, the slit line which is slit by the slit blade is indicated by reference numeral 23.

The needle blade 21 is composed of, for example, a sewing needle as shown in FIG. The blade 20 is composed of a cutter knife, a needle blade or the like used in a slit.

It is necessary that the notch 17 which does not penetrate does not split apart during subsequent stretching and winder, and easily splits during warping and plucking. Therefore, the cut
17 is t / T = 0.01 to 0.5, preferably 0.1 to 0.3 (where T
Is the unstretched film thickness, t is the cutting depth, see FIG.

The cross-sectional shape of the cut may be V-shaped as shown in FIG. 2 or other U-shaped as long as the desired object of the present invention can be achieved.

Alternate formation of cuts and penetrations according to the present invention can also be accomplished by using a saw blade roll 24 as shown in FIG.

The saw blade roll 24 is provided with a large number of saw blades 25 at appropriate intervals over the entire circumference of the roll, and a jig 26 for forming a not-through cut in the middle of the saw blades 25. Is provided. The jig 26 may be the same blade 20 as described above. Further, as shown in FIG. 4, the saw blade 26 may be shorter than the saw blade 25.

Further, the alternate formation may use an elliptical blade 27 as shown in FIG. Oval shape, deep unstretched film
It is possible to alternately form a portion (penetration portion) that bites into 28 and a cut portion that does not bite into the film 28 and that does not penetrate the film 28.

In the present invention, the cuts and the penetrating portions are alternately formed in one line or in two or more lines. In the pre-slit film, the denier of the stretched tape can be halved by forming a single slit and a penetrating portion between the slit blade and the slit blade. The denier of the stretched tape can be further reduced by forming two or more cuts between the slit blade and the slit blade.

In the above description, the formation of the cut lines having the cuts and the penetrating portions alternately has been described by taking the unstretched film as an example, but the cut lines may be similarly provided in the stretched tape.

〔Example〕

 Next, examples of the present invention will be described.

Examples 1-2 High-density polyethylene (Showa Denko KK, Shorex F5
010, MFR = 1.0 density = 0.950 g / cm ³ ) was used to extrude a T-die film, slit, stretch, anneal, and wind the resulting stretch tape onto a bobbin. The T-die film had a width of 700 mm, a thickness of 45 μ, a slit width of 16 mm, and a draw ratio of 7.0. The resulting tape has a denier of 1000 ^D and is a 17μ thick stretched tape.

In the present invention, in order to obtain a two-connecting tape in which the denier is halved to 500 ^D , a tape was obtained by installing a needle blade roll as shown in FIG. 3 in the middle (8 mm) of the slit width of 16 mm. At that time, the cut t / T was changed to 0.02 and 0.4.

As a result, there is no splitting when winding the tape,
Using the tape, the two connecting tapes were separated and passed through one by one using a warp machine for weaving, and no warping occurred and no warp occurred and warping was smoothly performed. did it.

Comparative Examples 1 to 2 A tape was obtained in the same manner as in Example 1 except that t / T was set to 0.005 and 0.7, and warping was performed using this tape. As a result, when t / T was set to 0.05, there was no splitting during winding of the tape, and splitting did not occur even after the lapse of time, but fluff occurred, and the splitting occurred at the parts other than the streak. However, it was not a good one. On the other hand, when t / T is set to 0.7, splitting occurs in two lines during stretching. Thus, when t / T was set to 0.7, the tape was already separated into two pieces at the time of winding and could not be said to be a connecting tape intended for separation in the warping stage.

〔effect〕

According to the present invention, not only the number of bobbins is reduced and the installation space for the number of winders is small, but also the lifting labor to the creel stand is reduced, and the number of weights of the creel stand is also reduced, and the installation space is also reduced. It can be small, and can save labor in the process, and its industrial significance is great.

The present invention can be applied not only to tapes but also to such things as slit yarns.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of tapes according to the present invention,
FIG. 2 is a sectional view taken along the line II of FIG. 1, FIG. 3 is a sectional view of an example of a needle blade roll used in the present invention, and FIG. 4 is an example of a saw blade roll used in the present invention. 5 and 5 are explanatory views of an example of an elliptical blade used in the present invention, FIG. 6 is a process flow diagram of a conventional process, FIG. 7 is an explanatory view of a stretched tape manufacturing apparatus, and FIG. 8 is a slitting process and winding. It is explanatory drawing of a taking process. 17 …… Not penetrated notch 18 …… Penetration part 19 …… Unstretched film 20 …… Blade 21 …… Needle blade 22 …… Needle blade roll 24 …… Saw blade roll 25 …… Saw blade 26 …… Blade 27 ...... Oval blade

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Toru Ogawa 2591, Inayoshi Shimoinayoshi, Chiyoda-mura, Shinji-gun, Ibaraki Taisei Polymer Co., Ltd. Ibaraki Plant (56) Reference Japanese Patent Laid-Open No. 50-58361 (JP, A) Sho 48-107950 (JP, U)

Claims (2)

[Claims] 1. Tapes that can be used as knitted fabrics, binding tapes for ropes, etc., in the length direction of the tapes, in the thickness direction of one or two or more lines between the slit lines. Not penetrated t /
T = 0.01 to 0.5 (where T is the thickness of the unstretched film or the stretched tapes, t is the depth of cut), and a cutting line having alternating through portions penetrating in the thickness direction is provided. Thermoplastic resin connecting tapes that are continuous until necessary, but can be split along the cutting line if necessary. 2. An extruded unstretched film or a tape which can be used as a knitted fabric or a binding tape for ropes, which comprises a film extrusion step, a slit step, a stretching step, an annealing step and a winder step. For stretched tapes, a needle blade roll or a saw blade roll or an elliptical blade equipped with a cutting blade in the middle that can alternately form a notch that does not penetrate in the thickness direction and a penetrating part that penetrates in the thickness direction is provided. Not abutting and penetrating in the thickness direction of one or more strips t / T = 0.01 to 0.5 (where T is the thickness of unstretched film or stretched tape, and t is the cutting depth)
A cutting line having alternating cuts and penetrating portions penetrating in the thickness direction, is continuous until necessary, which is characterized in that it is formed between the slit line and the slit line, but if necessary, the above A method for manufacturing thermoplastic resin connecting tapes that can be split along a cutting line.