JPS6282905A - Monofilament for brush - 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 (Field of Industrial Application) The present invention relates to a monofilament for brushes that has excellent hair styling properties and flocking properties in a balanced manner, and is capable of providing stable brush quality as, for example, hair brushes and toothbrushes. It is.

(Prior art) Synthetic linear polymers such as polyamide and polyester have traditionally been used as brush materials for hairbrushes, toothbrushes, clothing brushes, etc., but the required performance is becoming increasingly diverse. Recently, there has been a demand for materials that have further improved hair styling and hair flocking properties in addition to various physical properties suitable for brushes.

In other words, when monofilaments made of synthetic linear polymers are applied to brushes, the monofilaments are generally first converged into a bundle several centimeters in diameter, and the outer circumference is wrapped with paper tape or the like to maintain the shape. After doing this, cut it into a certain length of about 1 Trt,
It is provided in the form of a so-called cut bristle product. In the brush manufacturing process, the cut bristle is roughly cut into a certain length of several centimeters, and after the hair is styled, a certain number of bristles are implanted into the holes of the brush material (handle) using a flocking machine. be.

However, in the above-mentioned hair styling and hair transplanting operations, conventional monofilaments are difficult to handle because of the strong squeaks between the monofilaments during hair styling and cutting operations using force-brittle methods, resulting in clumps becoming disordered or falling apart. There is a problem in terms of workability, and due to this problem, the condition of the flocked hair after flocking with a flocking machine on the brush handle is also high, such as variations in the number of flocks per hole and uneven assembly, resulting in a high rate of defective flocking. However, there was a drawback that the brush quality was not stable.

Conventionally, in order to improve these problems, it has been known to coat the surface of the monofilament with a lubricant or lubricant consisting of an emulsion or oil agent such as mineral oil, higher alcohol, alkyl ml ester salt, and dimethylpolysiloxane. However, even with such a method, it is not possible to balance and satisfy the hair styling and flocking properties of monofilamen 1 for brushes, and the reality is that further improvements are desired.

(Problems to be Solved by the Present Invention) Therefore, the present inventors have developed a brush that can provide stable brush quality as a hair brush or a southern brush, for example, by having a balance between hair styling property d3 and hair flocking property. As a result of intensive studies aimed at obtaining a monofilament for use in the production of monofilaments, it was discovered that the above object could be effectively achieved by applying a specific silicone oil mixture to the surface of the monofilament, and the present invention was achieved.

(Means for Solving the Problems) In other words, the present invention provides 5 to 100 ffl of amino-modified silicone oil per 100 parts by weight of dimethylpolysiloxane to the surface of a monofilament made of a synthetic linear polymer.
The present invention provides a monofilament for a brush, characterized in that it is coated with a mixture containing 1 part of FF.

The synthetic linear polymers used in the present invention include, for example, nylon 6, nylon 66, nylon 610, nylon 612,
Homopolymers or copolymers selected from polyamides such as nylon 11 and nylon 12, polyesters such as polyethylene terephthalate and polybutylene terephthalate, polyolefins such as polyethylene and polypropylene, and polyvinylidene halides such as polyvinylidene chloride and polyvinylidene fluoride. These polymers contain antistatic agents, heat resistance agents, light resistance agents, weather resistance agents, lubricants,
Conventional additives such as plasticizers, colorants, dyes and pigments can be included.

The monofilament made of the synthetic linear polymer is produced by supplying the polymer separately for melt-spinning, cooling the melt-spun spun yarn as necessary, and then drawing it to an appropriate magnification of, for example, 3 to 8 times. Manufactured by heat setting according to the requirements.

The diameter of the obtained monofilament is 0.05-0.80
m can be arbitrarily selected within the range, and in order to apply it to the above-mentioned brush applications, it is important to subject it to coating treatment with the silicone oil mixture described below.

The dimethylpolysiloxane used in the present invention has the structural formula shown below, and is commercially available from Toshi Silicone Ichiki under the trade name 5H-200.

The amino-modified silicone oil used in the present invention is one in which a part of the methyl group of dimethylpolysiloxane is substituted with an amino group so that it has the structure shown in the following formula.For example, from Toshi Silicone (5) to 5F8417 It is commercially available under the trade name.

H2 (R is an alkylene group) The amino group equivalent of this amino-modified silicone oil is 1,
A range of 000 to 5,000, especially 1,500 to 3.500 is suitable; if it is less than 1.000, the monofilament will become sticky, and if it is more than 5,000, the effect of improving hair flocking properties will be insufficient. There are cases.

Here, the amino group equivalent of the modified silicone oil is W/
M [W: ff1f of amino-modified silicone oil
fl l>, M: W i) is the value defined by the number of moles of amino groups in the amino-modified silicone oil].

The dimethylpolysiloxane and amino-modified silicone oil used in the present invention may be used by mixing 100 parts by weight of the former with 5 to 100 parts by weight, particularly 7 to 70 parts by weight of the latter. is important. If the amount of amino-modified silicone oil mixed is less than 5 parts by weight, not only will the squeaky feeling increase and the bundles become disordered during the hair styling process, but the effect of improving hair transplantability will be small, and if it exceeds 100 parts by weight, the squeaky feeling will increase. However, this is not preferable because it increases the stickiness of the thread and actually reduces the flocking properties.

In the present invention, the method of coating the surface of the monofilament with the mixed silicone oil includes a method of applying the mixed silicone oil as an aqueous emulsion to the surface of the spun and drawn monofilament using an oiling roller, and a method of applying the mixed silicone oil as an aqueous emulsion to the surface of the monofilament using an oiling roller. Methods such as directly immersing the monofilament in the emulsion and attaching the emulsion are prohibited. In either method, the monofilament for a brush of the present invention can be obtained by attaching the emulsion and then preferably drying to evaporate the aqueous medium.

The amount of mixed silicone oil attached to the monofilament is 0.003 to 0.10% by weight, especially 0.005 to 0.10% by weight.
A concentration of 0.08 weight percent is preferable, and if it is less than 0.003 weight percent, the effect of improving hair flocking properties may be insufficient;
If it exceeds 0 weight percent, the thread becomes sticky, which not only worsens the handling condition (fibrillation ability) in the hair styling process, but also may deteriorate the flocking condition.

(Operation of the invention) The monofilament for brushes of the present invention obtained in this way is collected into a bundle with a diameter of several cm, further taped, and then cut into a constant length of about 1 m. There is no squeak at all in the process of making bristles, cutting the bristles to a certain length, and styling the hair.
There is almost no disturbance or collapse of the bundle. When a certain number of cut bristles are further implanted onto the brush base material (handle), the incidence of defective products is significantly reduced, productivity is improved, and the quality of the brush is also significantly improved.

The reason for the effect of the present invention is not clear, but it may be that by mixing dimethylpolysiloxane and modified silicone oil in a specific ratio, the compatibility of the silicone oil with the monofilament increases, resulting in smoothing and lubrication. This is thought to be due to the further improvement in effectiveness.

EXAMPLES Below, the effects of the present invention will be briefly explained with reference to Examples.

(Example) Nylon 610 tip manufactured by Toshi ■ (0M2001 > 4
Subjected to 0mψ extruder, polymer temperature 260
Melt-spun under the conditions of 'C, then stretched 4.5 times,
When winding up after the relaxing heat treatment, a 0.2% by weight aqueous emulsion of mixed silicone oil, prepared by mixing dimethylpolysiloxane and amino-modified silicone oil with an amino group equivalent of 2000 at the mixing ratio shown in Table 1, was placed in a winding machine. The monofilaments were coated using an oil row installed in front of the coating to achieve the predetermined coating weight shown in Table 1.

The thus obtained E-nofilament with a diameter of 0.21M was then converged into a bundle with a diameter of 50mm, taped with a taping machine, and then cut into 30m lengths to form cut bristles.

The cut bristle was defibrated by hand kneading, the tape was removed, the hair was thoroughly styled, and then the hair was transplanted as described below.

In other words, the above-mentioned cut bristle with a length of 30 m was opened using a flocking machine into a toothbrush handle made of ΔS resin.
A toothbrush was prepared by implanting 18 bristles into each of ## and 38 holes.

The evaluation results of the hair styling and hair transplanting properties during the above hair styling and hair transplanting operations are also shown in Table 1.

The hair transplantability and hair transplantability were evaluated according to the following criteria.

A. Squeaky feeling...When massaging a bundle of cut bristles cut to a length of 30 m with both hands, ○ ~ No squeak Δ ~ Slight squeak X ~ Very strong squeak 89 Disarray of the bundle: When kneading a bundle of cut bristle cut to a length of 30 m while holding it with both hands, ○ ~ The bundle is not disordered at all Δ ~ The bundle is slightly disordered X ~ Disorganized C0 stickiness that causes the bundle to crumble... After leaving a bundle of cut bristle cut into 200m lengths for more than 24 hours, unravel half of the paper tape and feel the monofilament when you hold it directly with your hand. The state of the monofilament when opening the bundle with , V1 hair failure incidence (%) After planting cut bristles on the handle of the south brush as described above, the number of hairs planted per hole was deviated from the standard of 18 ± 1 and there was a large variation in the number of bristles 'fl' And the total number of brushes with uneven assembly is calculated as the total number of flocked brushes (40
0).

(Hereinafter, the margin of this page) As is clear from the results in Table 1, the monofilaments for brushes of the present invention (Nos. 1 to 4) have better hair styling properties and The hair-planting property has been greatly improved, and both properties are well balanced.

On the other hand, when the amount of amino-modified silicone oil mixed is small (N(15)) or not mixed (Nα7)
No effects on improving the squeaking, disorder, and flocking properties of the bundles were observed. Also, if the amount of amino-modified silicone oil mixed is too large (Nα6), or if only amino-modified silicone oil is used (Nα8), stickiness remains a slight problem.
Furthermore, the effect of improving hair flocking properties is smaller than that of the present invention.

(Effects of the Invention) As explained above, the monofilament for a brush of the present invention does not give a squeaky feeling and is easy to handle in the hair styling process, and hardly causes any disturbance or breakage of the bundle. Furthermore, the monofilament for brushes of the present invention significantly reduces the incidence of defective products during flocking, improves productivity, and significantly improves the quality of the resulting brushes. As described above, the monofilament for brushes of the present invention is excellent in both hair styling and flocking properties, and is highly expected to be applied to general brushes such as toothbrushes, hairbrushes, and clothing brushes.

Claims (1)

[Claims] A monofilament for a brush, characterized in that the surface of the monofilament made of a synthetic linear polymer is coated with a mixture of 100 parts by weight of dimethylpolysiloxane and 5 to 100 parts by weight of amino-modified silicone oil.