KR930005102B1 - Manufacturing process of nylon monofilament yarn for the use of painting brush - Google Patents

Abstract

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Description

Manufacturing method of nylon monofilament yarn for paintbrush

1 is a manufacturing process schematic diagram of the present invention.

* Explanation of symbols for main parts of the drawings

1: Extruder 2: Spinning Block

3: variable motor 4: vibration device

5: cooling water tank 6: focusing guide

7: Cam roll 8: Guide roll

9: first gourd roller 10: bathtub

11: heater 12: traverse

13: winder

The present invention relates to a method for producing a high-quality brush yarn yarn (毛 原 絲) to have a cross-sectional surface and surface similar to natural hair, and to a method for producing a nylon monofilament yarn for a paint brush having excellent paint retention and excellent pillability.

Conventional paintbrush synthetic fiber yarn has been produced by releasing the cross section of the synthetic fiber yarn in a circular shape in order to exhibit a similar effect to the natural hair.

In other words, it was designed to improve the holding power of the paint by manufacturing irregular irregular cross sections such as triangular, square, polygonal, Y-shaped and T-shaped in a simple circular section.

However, these methods could improve some of the paint holding power, but they were not a fundamental solution.

The present invention is intended to have a paint holding power similar to that of natural hair by having the cross-sectional and surface characteristics most similar to natural hair.

In other words, the natural hair for paintbrush has irregular shape instead of monotonous cross section, and has a large number of fine roughness on the surface, so it can be used for a long time by maintaining the holding power of the paint, and also easily paints fine parts. You can paint.

In order to have a similar effect to the natural hair as described above, in the present invention, mold release and fine roughness are expressed in the longitudinal direction (fiber length direction) rather than in the transverse direction (orthogonal to the fiber axis) to maximize the holding power of the paint. It will be described below in detail the present invention.

In the present invention, a method of imparting mold release and fine concavity in the longitudinal direction is firstly performed by using a variable motor during spinning to control the discharge amount of the nylon polymer from the gear pump to induce the posture part. When solidifying a nylon monofilament having a melt-spun posture, a vibrating device is attached to the coagulation bath (water) to solidify while vibrating the fluid of the coagulation bath, thereby providing fine iron and release to the cross section of the nylon monofilament, and finally By installing a cam roller installed inside the coagulation tank can be considered a method of causing the difference (draft) of the yarn.

The present invention is characterized in that the three methods described above are applied together.

It is possible to change the fineness of the monofilament yarn to be spun by controlling the discharge amount of the polymer at regular intervals during spinning.

The created thread must satisfy the following conditions.

Fineness fluctuation range of nylon monofilament during spinning = setting denier ± 2%

However, setting denier is 30 to 100 denier.

In order to adjust the discharge amount of the polymer at a constant cycle, the frequency of the variable motor 3 is periodically changed. For example, when the frequency of the variable motor 3 is 10 Hz, the discharge amount is 10 to 12 g / min, and when the frequency range is set to 12 to 30 Hz, it is possible to manufacture 30 to 100 denier nylon monofilaments. .

In addition, by adjusting the fluctuation range of the frequency to ± 2Hz, it is possible to mold release and fine irregularities in the longitudinal direction of the fiber required by the present invention. At this time, if the fluctuation range of the frequency is greater or less than ± 2Hz, the effect of mold release and irregularities is reduced.

Next, in solidifying the spun monofilament while changing the discharge amount as described above, the vibration device 4 is attached to the coagulation tank 5 (water tank) to solidify while vibrating to further enhance the release and fine roughening effects. The conditions are as follows.

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1) Vibration frequency of solidification tank (times / minute) = 6000 ~ 7000

2) Vibration width of the solidification tank (mm) = 0.5 to 5

Finally, the cam roll 7 provided inside the coagulation tank 5 further promotes mold release. In other words, by changing the rotational speed of the cam roll (7), the shortening of the cam roll (7) takes less tension when in contact with the thread, and in contact with the long axis causes a greater tension to induce the extension car, and as a result, further demolding do.

The stretching fluctuation range and range should satisfy the following conditions.

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Stretch fluctuation due to cam roll = Draft ± 3%

Setting stretching; 5-30 range

In the present invention, when the stretching range is 5 to 30, it is possible to produce a nylon monofilament of 30 to 100 denier, and the stretching fluctuation period is about 3 to 30 rpm by rotating the cam roll 7 at 15 to 30 rpm periodically. Can be caused by. At this time, when the stretching fluctuation exceeds ± 3%, the storage force and the high tension are alternately applied, and trimming occurs. When the fluctuation range is less than ± 3, the change in tension is insignificant and the effect due to the stretching car cannot be expected.

The nylon monofilament yarn for the paint prepared by the present invention exhibits fineness difference in the longitudinal direction of the fiber and has an irregular heteromorphic cross section, and also has many fine irregularities on the surface of the fiber.

Example 1

After melting the nylon-6 chip having an intrinsic viscosity of 2.54 in the extruder (1), the frequency fluctuation is set to 15 Hz ± 2 through the variable motor (3) in the metering pump when radiating from the spinning block (2) to 500 m / Spin at the speed of min, and solidify the coagulation tank (5) located under direct confinement at a vibration width of 1 mm, a frequency of vibration of 6500 times / minute, and a temperature of 5 ° C. Stretched on the first high roller (9) while varying the tension of the resin, and subsequently heat treatment to prepare a nylon monofilament yarn of 40 denier.

The results are shown in Table 1.

EXAMPLE 2 AND COMPARATIVE EXAMPLES 1-4

Nylon monofilament yarn was prepared while changing each condition as shown in Table 1.

TABLE 1

※ Holding force (coagulation force) is measured by the length of the straight line (m) that is not broken when drawing a straight line on drawing paper with a paint soaked with paint once.

Claims (5)

In the production of nylon monofilaments by melt spinning the nylon chips and then solidifying them in a coagulation bath, the discharge amount of the molten polymer is changed at regular intervals, and the solidification tank is vibrated to solidify while applying vibration to the monofilament, while simultaneously solidifying A method of producing a nylon monofilament for a paintbrush, characterized by imparting a stretching fluctuation width to a yarn by contacting a monofilament to a cam roll having a long axis and a short axis in a tank. The method of claim 1, wherein the change of the discharge amount is performed by changing the frequency of the variable motor connected to the gear pump. The method of manufacturing a nylon monofilament for a paint brush according to claim 2, wherein the frequency variation of the variable motor is 12 to 30 Hz ± 2. The method of manufacturing a nylon monofilament for a paint brush according to claim 1, wherein the number of vibrations of the coagulation bath is 6,000 to 7,000 times / minute, and the vibration width is 0.5 to 5 mm. The method of manufacturing a nylon monofilament for a paintbrush according to claim 1, wherein the stretching fluctuation range is 5 to 30 times ± 3 times.