JPS606474Y2 - sheet-like material - Google Patents

Description

[Detailed description of the invention] This invention is capable of measuring the length and running speed of sheet-like objects by photoelectrically detecting the seams of running sheets during various finishing processes, and for measuring the length and running speed of sheet-like objects during the fabric shrinking process. The present invention relates to a sheet-like material that can be photoelectrically detected for measuring the shrinkage ratio and the reciprocal number in the unwinding process.

Conventionally, undyed industrial sewing thread has been used as a seam thread for sheet-like materials such as fabrics.

Although the seams were usually tied using backstitching, it was impossible to detect the seams during high-speed running using these sewing threads.

One known method for measuring the length and shrinkage rate of a fabric during running in the upper process is to measure the number of rotations of a guide roller with a roller gauge.

Also, known methods for detecting seams of fabric include a method of sensing changes in the thickness of the seam, and a method of weaving transparent fiber threads into the ends of the fabric and detecting by light transmission through that portion.

However, all of these methods have drawbacks such as insufficient precision, complicated operations, and furthermore, difficulty in applying them to wet fabrics.

As a result of intensive research into a method for easily and reliably detecting seams, the inventor of the present invention used yarn colored with a fluorescent dye of a certain concentration or higher as a seam yarn for sheet-like materials.
We arrived at the present invention after finding out that when a sheet-like material bound to a specific structure and traveling is irradiated with ultraviolet rays, visible light is emitted with enough intensity to be detected even when traveling at high speeds.

The present invention provides a sheet-like material having a seam structure that can be used to detect seams by such a photoelectric method.

That is, the present invention is a sheet-like material in which a long sheet is bound by overstitching, multiple butt stitching, or multiple overlapping stitches using yarn colored with a fluorescent dye of 1% by weight or more based on the weight of the fibers. Characterized by being a thing.

According to the sheet-like article having a joint structure according to the present invention, 1
It is possible to appropriately and sensitively detect fabric seams photoelectrically even when traveling at high speeds of 00 m/mm or higher.

Therefore, it is possible to measure the length and speed of a running fabric,
It is possible to reliably and easily measure the degree of shrinkage or dimensional changes in the fulling process or other upstream processes, or the number of rolls in the unwinding process, and is extremely useful for automatic control of quality and work.

Furthermore, in a shearing machine or the like, by photoelectrically detecting the seam and temporarily moving the blade up and down at the seam, the blade can be protected and the seam can be prevented from being cut.

Furthermore, because of its good fastness, it does not contaminate the cloth material or lose its effectiveness during normal wet treatment or heat treatment, and its effectiveness does not deteriorate over time.

Furthermore, it has many features such as being able to reliably detect even wet conditions.

To explain more specifically the yarn used for the seam of the present invention, FIG. 1 is a side view showing an example of the yarn used for the seam of the present invention, and usually, twin or triple twisted yarns are preferably used.

The seam detection thread is preferably a natural or regenerated cellulosic fiber such as cotton, linen, polynosic, nylon 6,
Nylon 6.6, polyamide fibers such as aromatic polyamides, polyester fibers such as polyethylene terephthalate, polybutylene terephthalate, polyoxyethoxybenzoate, semi-synthetic fibers such as cellulose acetate, polyacrylonitrile fibers, or acid dyes. Dyeing long fiber yarns or spun yarns made of modified synthetic fibers such as dyeable modified polyester, basic dye dyeable modified polyester, and mixed fibers thereof with a fluorescent dye that has an affinity for the fibers. It can be obtained by

In addition, in the case of yarns or synthetic fibers in which dyes and pigments are fixed to the fiber surface using polymers that have an affinity for dyes and pigments,
It may be a yarn obtained by blending dyes and pigments at any stage in the manufacturing process.

Preferred fluorescent dyes are white or yellow fluorescent dyes;
Specifically, the following dyes are exemplified.

Polyamide fiber...C01, acid yellow 7
C, I Fluorescent 54, 52.90 Polyester fiber...C, I, 7'Isbur's yellow (acetate fiber) 186 C, I, Fluorescent 35 Cellulose fiber...C, I, Ri Active Yellow 8 C, I, Fluorescent 90.84.85 86.24.242 2 Polyacrylonitrile fibers...-C, I, Basic Yellow 13.11.51°4 However, particularly preferred dyes are dyes irradiated with ultraviolet light. Time 500
It is a yellow dye that emits visible light with a peak around ~540 mu.

The dye concentration varies depending on the dye used, the target material, the coloring method, etc., but is at least 1% by weight, preferably at least 2% by weight, based on the weight of the fiber.

If the dye concentration is less than 1% cwf, the seam cannot be detected photoelectrically when used as a sewing thread for tying.

Therefore, it is impossible to detect a seam even if ordinary fluorescent whitening thread dyed at a density of 1% owf or less is used as a sewing thread due to the density quenching phenomenon.

Usually, many dyes contain dispersants and other impurities, but the dye concentration in this invention means the pure content.

The fiber materials to be used are particularly preferably filament yarns or spun yarns of polyester or polyamide, cotton yarns, and blended yarns of polyester or polyamide and cotton in view of chemical resistance, heat resistance, strength and elongation, and the like.

Further, as the detection yarn used in the raising process, the above-mentioned spun yarn is more preferable because it is strong.

The sensing yarn of the present invention preferably has a yarn tenacity of 700E1 or more, and particularly preferably 900 f/ or more.

The yarn colored with fluorescent dyes is then preferably treated with waxes, diorganopolysiloxanes, perfluorinated compounds, and the like.

Using the thus obtained seam detection yarn, the seam structure shown in FIGS. 2 to 4 is tied.

That is, FIG. 2 is an explanatory view showing a seam structure by overlock stitching, FIG. 3 by butt stitching, and FIG. 4 by overlapping stitching.

In FIG. 2, 1 is a seam detection thread, and 2, 2 are the ends of two sheets to be joined.

The seam detection thread 1 is stitched across both ends of the sheet-like object 2゜2' with a large width a1 and a high stitching thread density, and in order to ensure the detection of fluorescence, it is especially suitable for sheet-like objects that run at high speeds. It is valid in the case of

The width a of the above-mentioned overlock stitch is usually preferably 1.5 to 2 CrIt, and the sewing thread density is usually 5 to 20 threads/cm, especially lO
It is preferable that it is 15 pieces/cm.

In addition, in Figures 3 and 4, 3 is a seam detection thread, 4.4
' is the end of the two sheets to be joined together, and is sewn together by the seam detection thread 3.

In the case of the structure shown in Figs. 3 and 4, it is preferable to use a thread colored with a fluorescent dye with a high concentration of 2% or more as the seam detection thread 3. Furthermore, single stitching is inferior in detection accuracy. It is necessary to use multiple stitches such as , double or triple stitches.

Note that sheet-like materials include knitted fabrics, non-woven fabrics, paper, synthetic paper,
Examples include long sheets such as films, tapes, and rugs.

The present invention will be explained below with reference to Examples.

Example 1 Nylon 6.6 filament yarn (150dX4) was
, 1, 10 in a l'H5,0 dye bath consisting of acid yellow 73.0% owf and anionic yarn leveling agent 1% owf.
After dyeing at 0°C for 60e, it was washed with water and dried.

Using the obtained dyed thread, overlock a wool fabric (width 1.
The length of the woven fabric is measured by sensing the fluorescent light emitted when the woven fabric is irradiated with ultraviolet rays through a filter while running in the shrinking process. The shrinkage rate was controlled.

Example 2 Polyester spun yarn (56'5/2) C, I, Disbirds Yellow 1863.5% owf and dispersant 1.0y
After dyeing at 120° for 160 minutes in a pH 4.5 dye bath consisting of 1.5 liters, the sample was washed with water and dried.

Using the obtained dyed thread, overlock a cotton fabric (width 1.5
The fabric was knotted at a thread density of 1/20 and yarn density of 1 pot/.), and the speed of the fabric during the processing process was determined using a measuring device that senses the fluorescence emitted by ultraviolet irradiation.

[Brief explanation of drawings]

Fig. 1 is a side view showing an example of the detection thread used for the seam according to the present invention, and Figs. 2 to 4 are explanatory diagrams showing the joint structure of the sheet-like article according to the present invention using the seam detection thread. It is. The second figure shows the overlock stitch, and the third figure shows the butt stitch. Figure 4 shows the seam structure by overlapping stitches. 1.3... Seam detection thread, 2,2'...
・End of sheet-like object, 4,4'... end of sheet-like object.

Claims (1)

[Scope of utility model registration request] 1. A sheet-like article characterized in that a long sheet is sewn at its ends with threads colored with a fluorescent dye of 1% or more by weight based on the weight of the fibers.