JPS60181357A - Treatment of chemical fiber - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for treating chemical fibers used in writing brushes, paint brushes, makeup brushes, and the like.

As is well known, the materials mentioned above include animal hair and chemical fibers (
For example, vinyl-based, polyester-based, etc.) are used, but the latter is generally cheaper than the former, and the former is superior in terms of usability.

In other words, animal hair is difficult to obtain in desired quantities in large quantities, but is functionally preferable, while chemical fibers can be obtained in large quantities with desired lengths and diameters at low cost, but it is difficult to obtain desired lengths and diameters in large quantities, but it is difficult to obtain the desired length and diameter in large quantities. It is difficult to form a sharp point, and therefore, it is functionally inferior to animal hair.

The applicant focused on the points mentioned above, and first set a large number of comparatively hydrophilic chemical fibers, such as acetate, vinylon, etc., around the outer periphery of the operating rod, with the upper part concentrated. On the other hand, organic solvents such as ketones and esters are connected and spouted from the bottom of the processing container, and while this is overflowing, the above-mentioned operating rod is moved up and down and rotated at low speed. By repeating the movement of lowering approximately the lower half of the bundled chemical fibers into the organic solvent and raising it above the liquid level together with the rotational movement, each of the bundled chemical fibers is A method for treating chemical fibers for cosmetic brushes, which comprises forming the fibers into a sharp shape that gradually narrows from approximately the lower half to the tip. (Refer to Japanese Patent Publication No. 5B-4112) Currently, it is in the stage of prototype experimentation, but this is as follows.
It has been confirmed that the intended purpose can be fully achieved.

The present invention has been developed as part of the prior art, i.e. the object of the present invention is to:
Provided is a method for processing chemical fibers, which uses chemical fibers (in particular limited to polyester fibers in the present invention), to make them into a tapered shape similar to animal hair, that is, to obtain a soft touch feeling similar to animal hair. There is something to do.

Another object of the present invention is to provide a method for processing chemical fibers which can significantly shorten processing time compared to the prior art, and which is suitable for mass production and reduces costs.

Next, an embodiment of the method of the present invention capable of achieving the above object will be described in detail with reference to the accompanying drawings.

Fig. 1 is a longitudinal sectional front view of the processing container section showing the basic concept, Fig. 2 is an explanatory diagram during communication work, and ■ indicates the processing container (for example, the desired material is made of 1.5 mm thick stainless steel). 2 is a drain pipe with an automatic valve 2a provided at the bottom of the processing container l, 3 is a liquid supply pipe with an automatic valve 3a, and 4 is provided at the bottom of the processing container 1. The ultrasonic generator 5 is a fixed or rotatable plywood board, and in this embodiment, as shown in FIG. In addition, a large number of processing containers 1 are used.

The ultrasonic generator 4 is mounted on a base plate 5 at the bottom of each processing container 1.
The vibrator 4a is placed on the top of the processing container 1, and its vibrator 4a is in contact with the bottom of the processing container 1. guide is provided).

Reference numeral 7 indicates a drain liquid receiver installed on the base plate 1, 8 indicates an operating rod configured to be vertically movable and rotatable, and the illustrated example has a tapered portion 8a formed at the lower part of the round rod. This is how the tip of the brush is obtained, but when obtaining a flat brush or the like, the operating rod 8 is formed into a root shape, and a tapered portion is formed at the lower part of the operating rod 8. 9 is direct 1 ¥0.05~0.1
A polyester fiber 9 of about 2 mm is shown, and in a state where a large number of these polyester fibers 9 are bundled around the outer periphery of the operating rod 8, the upper part thereof is fixed with a string 10.

S indicates the solution placed in the processing container 1, for example, 25
~30% caustic soda (sodium hydroxide) is used, the volume being determined by the number of bundles of polyester fibers being treated. The function of the ultrasonic generator 4 is determined by the amount of solution mentioned above and the weight of the processing container 1, etc., but the appropriate sound is one that vibrates 5,000 times per second, so that 0.1 m of ultrasonic wave is generated in the solution S. A large number of bubbles sb of about 100 m are generated (note: about 200,000 bubbles per minute).

In Fig. 2, wc is the discharge and washing point of the treated liquid, wt is the dehydration point using a centrifuge, twl is the primary drying point, tw2 is the secondary drying point, to is the removed point of the treated fibers, and st is the point where the treated fibers are removed. It shows the setting of the fibers and the supply point of the solution, and all other operations except the removal and setting of the fibers are controlled by a computer equipped with a sensor function, and the vertical movement and rotation of the operating rod 8 are controlled by a computer. For example, it is carried out using a configuration similar to that described in Japanese Patent Publication No. 58-4112.

Then, at the st point, the solution S is supplied into the processing container 1 through the liquid supply pipe 3, and the polyester fiber 9 is set on the operating rod 8, and the operating rod 8 is rotated while moving up and down. At the same time, ultrasonic generator 4 is activated at 500 per second.
Drives 0 times. Also, the stand @5 is slowly rotated in the direction of arrow y in FIG. Then, in the solution S, Q, 1 mm
A large number of bubbles sb are generated (as mentioned above, 20 bubbles are generated every minute).
Approximately 10,000 bubbles sb are generated), and as the bubbles sb rise, the solution S comes into fluid contact with the processing length 9a (note, see Figure 3) where the polyester fiber 9 is to be melted, and a melting action is performed. However, in this case, as the processing length 9a reaches the lower limit 9a2 from the upper limit 9a+, the contact time with the solution S increases; in other words, more melting occurs, and the turn disk 8a
Coupled with the expansion of the processing length 9a due to the centrifugal force generated by the rotation of the operating rod 8, each polyester fiber 9 gradually narrows from the upper limit 9a+ to the lower limit 9a2. It becomes slightly tapered.

In this way, the processing container 1 is moved from the st point to the WC ([l
At the time the treated liquid is transferred to the il location, the treated liquid is discharged and washed at the wc location, dehydrated at the wt location using a centrifugal separation + a machine, and then primary and secondary dried at the twl and tw locations. Finally, the treated fibers are removed at the to point.

Although the continuous processing means while rotating the base plate 5 has been described above, the present invention is not limited to this, and the process may be performed with the base plate 5 fixed, that is, using an ultrasonic generator, This causes the solution to flow while generating many fine bubbles in the solution, melting the required length of the polyester fibers that are moving up and down and rotating, forming a tapered shape that gradually narrows, and then washing. This can be done by drying.

Since the present invention is constructed as described above, polyester fibers are used as a material and the fibers are made into a tapered shape similar to that of animal hair, that is, a soft touch feeling similar to that of animal hair can be obtained. By generating a large amount of microbubbles into the solution and causing the solution to flow due to the microbubbles, the overall processing time can be significantly shortened compared to the prior art described above, which can result in a reduction in &J costs. It is.

[Brief explanation of drawings]

The drawings show one embodiment of the method of the present invention, with Fig. 1 being a longitudinal sectional front view of the processing container according to the basic concept, Fig. 2 being an explanatory view during continuous operation, and Fig. 3 showing the processing state of polyester fibers. It is an explanatory diagram. 1... Processing container, 4... Ultrasonic generator, 5... Base plate, 8... Operating rod, 9...
...Polyester fiber, 9a...Processing length, 9a+...Upper limit, 9a2...Lower limit,
S...solution, sb...bubble.

Claims (3)

[Claims] (1) A large number of polyester fibers are fixed around the outer periphery of an operating rod with their upper parts in a focused state, and a processing container containing a solution such as caustic soda solution is vibrated with an ultrasonic generator, thereby A large number of microbubbles are generated in the inside, and the solution is made to flow, and a desired length portion of the bundled polyester fibers that is moving up and down and rotating through the operating rod is melted, and from the upper limit of the desired portion. 1. A method for processing chemical fibers, which comprises forming the fibers into a tapered shape that gradually narrows down to the lower limit, and then post-processing the fibers by washing and drying. (2) A desired number of processing containers are set on a rotatable plywood board via an ultrasonic generator, and the polyester fibers are melted and post-processed during one rotation of the base plate. A method for treating chemical fibers according to claim 1. (3) A method for processing chemical fibers as set forth in claim 1, which comprises setting a processing container on a fixed base plate via an ultrasonic generator.