JPH0133586B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention uses a package dyeing machine or a forced circulation type scouring/bleaching device using its principle to scouring/bleaching narrow gauze, cotton fabrics, etc. relates to a novel method for carrying out treatments such as staining.

[Prior art and its problems]

Most of the narrow gauze is scoured and bleached, then cut and used as sanitary materials, and the narrow cotton fabrics are scoured and bleached, then printed and used for yukata fabrics, or used as is for abdominal belts, etc. .

By the way, the scouring and bleaching treatment of these narrow products has conventionally been carried out using a natural circulation method. This is done by removing the winding core such as woodwind from the rolled fabric that has come out of the loom, and then cutting it into a predetermined length (for example, one roll) using a folding machine. A large number of them are packed in an open treatment tank B, and a bleaching solution S is sprayed from above and allowed to naturally permeate and fall for scouring and bleaching.
Then, the bleaching solution that has fallen is returned upward again by the pump P, and the above operation is repeated. still,
The symbol H in the figure is a heater.

This method eliminates the need for extra processes such as width adjustment, as the treated fabric does not shrink or wrinkle. In the case of yukata fabric, it can be printed directly after dehydration and drying, and in the case of sanitary gauze, it can be cut immediately after dehydration and drying. There are merits that can be made into products. However, since the bleaching solution penetrates through capillary action, it tends to cause uneven bleaching, and even if it takes around 20 hours to process one batch, it is still not enough, making it extremely inefficient.
Moreover, it is extremely difficult to pack the fabric so that the bleaching solution permeates uniformly throughout the fabric, and requires many years of experience. Incidentally, roll-shaped fabrics are also wound and packed into a processing tank with the core removed, but this method has the same drawbacks as described above and requires an extra step to smooth out wrinkles.

On the other hand, even with the same gauze and cotton fabrics, wide ones are subjected to scouring and bleaching treatment to efficiently and uniformly finish the cloth by moving it through a liquid. It is of course possible to apply this method to narrow-width woven fabrics, but in order to eliminate shrinkage and wrinkles caused by the processing, a width-lengthening and wrinkle-smoothing process is required before drying, and the processing weight per hour is small. Due to the high cost, this method has been used for a long time. Therefore, there has been a need for a method for efficiently and inexpensively processing narrow-width fabrics.

Furthermore, in the conventional method, it was not possible to use hydrogen peroxide solution as a chemical solution for scouring and bleaching. Hydrogen peroxide gives a good white finish and is highly safe, but it tends to bleach only the surface areas it comes into contact with, so the natural circulation method has the disadvantage of causing uneven bleaching. Therefore, in the natural circulation method, sodium hypochlorite (or sodium chlorite) is used,
At high temperatures, chlorine gas is generated, so at low temperatures (usually 30~30
40℃ or less), the whiteness is not sufficient and unevenness tends to occur. Furthermore, there are problems with wastewater pollution and occupational health.

[Object of the present invention]

The present invention has been made in view of the above, and an object of the present invention is to provide a method for scouring, bleaching, and dyeing of narrow gauze, cotton fabrics, and linen fabrics in a short time, efficiently, easily, and evenly. The present invention also provides a method of processing a narrow roll of gauze, cotton fabric, or the like by attaching it to a processing device as it is, using a forced circulation method. A further object of the present invention is to provide a method for scouring and bleaching these fabrics using a hydrogen peroxide solution.

〔composition〕

These objectives are to use a perforated bobbin as the winding core of the fabric, and to use a package dyeing machine or a forced circulation method of scouring and dyeing using its principle as a processing device.
This is achieved by using bleaching equipment.

Package dyeing machine (Obermeyer dyeing machine)
In this method, loose wool, yarn, and other materials to be dyed are stored or attached to a carrier that is fixed inside the case, and the dyeing solution is forced to circulate for dyeing. Conventionally, this method was used to scouring and bleaching textile products. This is hardly done.

In the present invention, a forced circulation type scouring/bleaching device (hereinafter referred to as "forced circulation device") that applies the principle of this package dyeing machine is used, and the treatment liquid includes sodium hypochlorite, sodium chlorite, and permeate. Using a bleaching solution mainly consisting of bleaching agents such as hydrogen oxide,
To perform bleaching treatment with excellent whiteness in a short time. Of course,
Although the present invention can also dye objects to be dyed using a package dyeing machine and a dyeing solution, the present invention will be explained below using scouring and bleaching treatments as examples.

First, in the forced circulation device, a roll wound around a perforated bobbin is inserted into a perforated cylindrical spindle provided on a carrier, and a bleaching solution is pumped from within the spindle for treatment. The bleach solution is heated by a heater and pressurized by a pump. Furthermore, in order to maintain uniform processing, the processing liquid may be moved in the opposite direction.

Incidentally, when the rolls are stacked on a spindle, it is necessary to prevent liquid from leaking from the boundary portions. To prevent liquid leakage, first, use a perforated bobbin that is slightly shorter than the width of the roll and apply pressure to the roll from the width direction to eliminate gaps. At this time, it will be more complete if a perforated bobbin is used that has portions without small holes at the upper and lower ends. Alternatively, a spacer having a diameter comparable to the winding diameter of each roll may be interposed between each roll, and the gap between the perforated bobbins may be filled with the spacer. In this case as well, depending on the shape of the spacer, it is preferable to use a perforated bobbin having portions without small holes at the upper and lower ends.

On the other hand, the fabric is usually wound into a roll on a loom onto a wood tube, and after the winding is completed, the wood tube is extracted before being sent elsewhere for scouring, bleaching, or dyeing. This was done to reduce weight and bulk, but conventionally this was sufficient as bleaching was done either as is or folded. However, in the present invention, it is essential that the rolled fabric includes a perforated bobbin. Therefore,
It is necessary to insert a perforated bobbin into the rolled fabric, but it has been difficult to do so because the rolled fabric collapses into a bamboo shoot shape. The inventor of the present invention has repeatedly conducted trial and error regarding this insertion, and has developed a technique for reliably inserting the bobbin into the center of the roll. This involves inserting and fixing a perforated bobbin into the space from which the original wood pipe was removed, using a bobbin insertion tool that will be described in detail later.

In the present invention, in addition to the bobbin inserted using this bobbin insertion tool, it is also possible to use a bobbin that has been wound onto a perforated bobbin on a loom from the beginning, or a bobbin that has been wound onto a perforated bobbin at a processing factory. . especially,
When dyeing, it is better to have a larger bobbin diameter, so a rewinding method is preferred. However, the former takes time and effort to collect the bobbin, and the latter causes time loss, so it is most preferable to insert the perforated bobbin after the scouring and bleaching process.

〔Example〕

Hereinafter, the present invention will be explained in more detail based on embodiments shown in the drawings.

FIG. 1a shows an example of a perforated bobbin 1 used in the present invention, and FIG. 1b shows a bobbin insertion tool 2 used for inserting the bobbin. The perforated bobbin 1 has a large number of small holes 1a...
For example, a material made of metal, particularly stainless steel, or acid- and alkali-resistant plastic, such as a polypropylene molded product, is preferably used. Its dimensions depend on the size of the original woodwind, the type of fabric, width, winding thickness, weaving density, etc., but the length is generally 30 to 50 cm.
The diameter is about 40 to 60 mm, the wall thickness is about 1 to 3 mm, and the size of the small hole 1a is about 2 to 8 mmφ. Incidentally, a portion without small holes may be provided at both ends of about 1 to 2 cm.

On the other hand, the bobbin insertion tool 2 has a base portion 2a having a diameter equal to or somewhat larger than the outer diameter of the perforated bobbin 1, and a step portion 2b for fitting the perforated bobbin 1 at the rear end. Further, the tip 2c is tapered, but a more preferable shape is one in which the tip 2c swells slightly and then becomes thinner again, and then gradually increases in diameter (particularly preferably in a parabolic shape). With the bobbin inserting tool having such a shape, the perforated bobbin 1 can be inserted without breaking the rolled fabric because insertion resistance is applied only to a part of the bobbin inserter. Note that this bobbin insertion tool 2 is not limited to the perforated bobbin 1 of the present invention, but can be used similarly when reinserting a bobbin into a winding core hole of a rolled fabric. Moreover, this bobbin insertion tool 2 may be a solid body or a hollow body.

FIG. 2 shows the procedure for inserting the perforated bobbin 1.
First, the bobbin insertion tool 2 is inserted from the tip into the hole 3a in the center of the rolled fabric 3 from which the woodwind has been removed as shown in FIG. 2a (FIG. 2b). Subsequently, the perforated bobbin 1 is inserted together with the bobbin inserter 2, with the tip thereof placed over the stepped portion 2b of the bobbin inserter 2 (FIG. 2c). At this time, the unique shape of the tip of the bobbin inserter 2 allows for extremely smooth insertion. The bobbin insertion tool 2 is preferably one that has low friction with cloth, such as polished woodwind. When the perforated bobbin 1 is completely inserted, the bobbin insertion tool 2 is removed, and a roll 4 as shown in FIG. 4D is obtained.

Next, this rolled body 4 is set in the forced circulation device 5 as shown in FIG. First, multiple spindles 7 fixed upright on the carrier 6...
One to several (four in the figure) rolls 4 are inserted into each of the rolls 4. Reference numeral 7a (FIG. 4) is a small hole in the spindle 7. This insertion can be done either by stacking each roll 4 as shown in Figure 4a, or by
This is done with a spacer 8 interposed between them as shown in FIG. In either case, spacers are inserted at the bottom and top ends of the stacked rolls 4 as shown in FIG. If the spacer 8 is not used, use a perforated bobbin 1 that is somewhat shorter than the width (height) of the roll 4 and tighten and press it with the cap 9 to create a gap between the rolls 4. It is a good idea to eliminate this to prevent fluid leakage. In addition, FIG. 3 shows the case where the spacer 8 is used, and A shows the state before the cap is tightened, and B shows the state after the cap is tightened.

On the other hand, the spacer 8 is used to prevent liquid leakage and collapse of the roll 4. Each spacer 8 is a disc-shaped member with a diameter approximately the same as the diameter of the roll 4 and has a hole in the center, and is made of metal or Molded from plastic such as polypropylene. Furthermore, the spacer 8 in Fig. 4b
has an annular protrusion 8a having the same diameter as the perforated bobbin 1 in the through hole, and is used when the length of the perforated bobbin is not shorter than the width of the roll 4. The spacer 8 shown in figure c is a short cylinder 8 inserted into the end of the perforated bobbin 1.
b, and is used when the length of the perforated bobbin 1 is not longer than the width of the roll 4. In this case, the small holes 1a may be provided throughout the perforated bobbin 1.

Next, the entire carrier 6 is suspended by the hanging fitting 10 and housed and fixed in a housing 11 which is the main body of the apparatus, and the entire carrier 6 is airtightly covered with a lid 12.

The bleaching liquid 13 is press-fitted from an inlet pipe 14 provided on the lower surface of the housing 11, passes through the small holes 7a, 1a, and so on of the spindle 7 and perforated bobbin 1, and flows downward while bleaching the fabric. to fall. At this time, the bleaching liquid 13 permeates and spreads radially from the perforated bobbin 1, and since it is pressurized, it permeates uniformly throughout the roll. Further, since the bleaching liquid 13 also moves along the spacer 8, when the spacer 8 is used, the shoulder (edge) of the roll is sufficiently bleached. On the other hand, the bleaching solution 13 that has fallen downward is discharged from the outlet pipe 1 provided on the lower side of the housing 11.
5 and taken out of the system, and sent to the inlet pipe 14 again. Excess bleaching solution 13 is discharged from the system through an overflow pipe 16. Further, reference numeral 17 in the figure is a heater for heating the bleaching solution 13;
8 is a pump. In this way, it has become possible to perform scouring, bleaching, and water washing treatments of the same or higher quality in about 5 to 7 hours, which conventionally took more than 20 hours.

By the way, in the present invention, hydrogen peroxide can also be used as the bleaching solution 13 in addition to sodium hypochlorite and sodium chlorite. As mentioned above, hydrogen peroxide solution is safe, has little pollution problem, and can be obtained with excellent whiteness. However, since the bleaching rate is slow at low temperatures, it is necessary to raise the temperature to around 90 to 120 degrees Celsius. It goes without saying that sodium hypochlorite and sodium chlorite can also be used in the present invention.

After the above scouring and bleaching steps, the product is washed with water in the same manner. Next, roll 4 for each carrier 6...
... is taken out from the device 5, dehydrated and dried, purified and
A bleached roll 4A is obtained. This roll 4A is cut and folded into appropriate amounts for sanitary gauze 19 or white cloth, and printed as is for yukata fabric 20, etc. (FIG. 5).

Although the case in which a bleaching solution is used as the treatment solution has been described above, a dyeing solution can be used in a similar apparatus to dye narrow-width fabrics.

Finally, an example of treatment using hydrogen peroxide as a bleaching solution will be described. First, a perforated bobbin 1 was attached to a roll of gauze with a width of 32 cm rolled up to a diameter of about 24 cm, and _{nine bobbins} were packed into a container with a capacity of 400. 300℃ of bleaching solution is heated to about 110℃ and extruded from the spindle at a rate of about 5/Kg/min with a pump pressure of 1Kg.

After continuing the scouring and bleaching action by forced circulation for about 6 hours, including washing time, it was dehydrated to a moisture content of 85.
%, and then dried to a moisture content of approximately 7%, followed by scouring and bleaching. The resulting bleached gauze is
Alkaline residue, glue residue, water-soluble residue, ash content, whiteness, etc. all cleared the pharmacopeia standards.

In addition, when a sodium hypochlorite aqueous solution with a concentration of 0.3% and a temperature of 40°C was used as a bleaching solution and forced circulation treatment was performed for about 7 hours in the same manner as in the previous example, it was found that A scouring and bleaching gauze with a finish that satisfactorily clears the pharmacopoeial standards was obtained, although the whiteness decreased.

〔effect〕

As detailed above, the method of the present invention involves scouring, bleaching, or dyeing a small piece of gauze or cotton fabric wrapped around a perforated bobbin while forcibly circulating a processing solution using a forced circulation device. be.

Therefore, compared to the conventional natural circulation method,
Since more complete processing can be performed in about 1/2 the processing time, it is possible to significantly rationalize the number of equipment and the number of workers, and it is also possible to move exposed and contaminated materials into and out of the processing equipment easily and in a short time. Work efficiency will also be greatly improved. Furthermore, since hydrogen peroxide can be used as a bleaching solution, the working environment is improved, and high-quality scouring and bleaching finishes with high whiteness and little damage to the fabric can be achieved, making it extremely useful. Furthermore, if the perforated bobbin is recirculated using a bobbin inserter, there is no need to return or rewind the bobbin, and preparation can be carried out efficiently.

[Brief explanation of drawings]

FIG. 1a is a perspective view showing an example of a perforated bobbin used in the method of the present invention, FIG. 1b is a perspective view showing an example of a bobbin insertion tool, and FIG. In the explanatory diagrams, a is a perspective view of the rolled fabric with the woodwind removed, b is a cross-sectional view with the bobbin inserter inserted, c is a cross-sectional view with the perforated bobbin inserted, and d is a cross-sectional view with the perforated bobbin inserted. A perspective view of the inserted roll, FIG. 3 is a sectional view showing an example of the scouring/bleaching device, and FIGS. 4 a, b, and c show parts of the roll inserted into the spindle in different ways. A sectional view, FIG. 5 is a perspective view of the finished roll,
FIG. 6 is a schematic diagram showing an example of a scouring/bleaching apparatus according to a conventional method. 1... Perforated bobbin, 2... Bobbin insertion tool, 3...
...Rolled fabric, 4... Roll, 4A... Roll after treatment, 5... Forced circulation device, 6...
Carrier, 7...Spindle, 8...Spacer,
11...Case, 13...Bleach liquid, 14...Inlet pipe, 15...Outlet pipe, 17...Heater,
18...Pump.

Claims (1)

[Scope of Claims] 1. When a perforated bobbin is inserted into a roll of narrow fabric such as gauze or cotton cloth to be scoured, bleached, or dyed using a forced circulation type scouring and bleaching device, After the winding core used in weaving is extracted, the base part has a diameter that is equal to or slightly larger than the outer diameter of the perforated bobbin, and the rear end has a stepped part for fitting the perforated bobbin, and the tip Insert the perforated bobbin into the center of the roll using a bobbin inserter that tapers toward the end and has a slightly bulged tip, and then insert the perforated bobbin. Processing of narrow-width fabrics characterized by fitting the rolled body into the spindle of a carrier, then storing and fixing the carrier together with the carrier in a case, and scouring, bleaching, or dyeing the fabric while forcing the circulation of a processing solution. Method. 2. The method for treating narrow fabrics according to claim 1, wherein a hydrogen peroxide solution is used as the treatment liquid for scouring and bleaching.