JP4180351B2 - Artificial hair and its matting method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to artificial hair having a texture similar to that of natural human hair both in appearance and quality after dyeing and maintaining curling properties even after time, and a matting method thereof.
[0002]
[Prior art]
Conventionally, filaments of various synthetic fibers have been used as artificial hair used for wigs, hair wigs and the like. And as a material of such synthetic fiber filaments for artificial hair, vinyl chloride, modacrylic, polyester, nylon, etc. are widely used.
[0003]
By the way, when wearing a wig using artificial hair and living daily, depending on the material used for the artificial hair, the tip of the artificial hair is mainly crimped. When such shrinkage occurs, the natural view of artificial hair is remarkably impaired, and a problem arises that at first glance it turns out to be a wig. Therefore, conventionally, the wig wearer has periodically corrected the curly artificial hair.
[0004]
However, the work of correcting the once-skinned artificial hair involves various difficulties. For example, there are wigs that cannot be easily attached / detached, and in recent years, the number of wearers of such wigs that cannot be attached / detached has increased. Such a wig fixes the wig to the own hair, that is, to the head by binding the own hair to the edge of the base net of the wig and further hardening the knot with a medical adhesive. Therefore, since the wig is firmly fixed in this way, the wearer cannot remove the wig himself.
[0005]
On the other hand, normally, when the own hair grows and the overall balance between the own hair and the wig becomes unnatural, the above-mentioned crimp is generated in the artificial hair. Therefore, it is necessary to correct this shrinkage. If the wig is detachable, you can wear a spare wig, replace it, and repair the wig's crimp by folding it. A procedure is required in which the wig is removed, the wig of the curled artificial hair is repaired, and the entire head is trimmed.
[0006]
However, some materials, such as nylon filaments, are less prone to crimp when made into artificial hair. However, due to the characteristics of nylon, once the nylon filament artificial hair is adjusted to the desired shape by heat treatment at the time of shipment from the factory, it will change the shape once formed, even if you want to curl it later, for example. I can't.
[0007]
Also, since vinyl chloride and modacrylic have the property that curling properties are not as good as nylon, there is no need to perform curling or other processing afterwards. Therefore, the ratio used for straight hair wigs is extremely high.
[0008]
Polyester filaments have the disadvantage that they are relatively easy to shrink compared to other materials, but because of the rigidity of polyester, they have the advantage of being able to form a heavy hairstyle when made into wigs. ing.
[0009]
[Patent Document 1]
JP 2002-161423 (Summary, FIG. 1)
[0010]
[Problems to be solved by the invention]
By the way, like the above-mentioned nylon filament, after being shipped from the factory, it cannot be changed to any hairstyle by the wearer of the wig. It cannot be denied. In addition, since the nylon filament has low rigidity, the wig worn tends to become cat hair, and in recent years, there is also a problem that it is impossible to form a hairstyle with a trendy feeling among young people.
[0011]
In addition, since the filaments of vinyl chloride and modacrylic have the property that these materials are easily decomposed or altered by high heat, even if they shrink due to changes over time during use as described above, In order to repair the crimp, it is impossible to use high heat in the wig, and in many cases, it is disposable. Therefore, there is a problem that there is a lot of waste.
[0012]
On the other hand, the polyester filament is formed to a thickness close to human hair due to its rigidity, and when a wig is made with this, it looks as if a wire is flocked, so it cannot be formed so thick. If it cannot be formed thick, the thickness of the hair becomes different from that of the hair, so that there is a problem that the balance with the hair becomes unnatural in appearance.
[0013]
In any case, in the case of fixed wigs that cannot be easily attached or detached for repairing the crimps that have occurred once, the wearer simply visits a professional hair salon and re-installs the wigs each time. Not only was it necessary to wait while repairing the frizz, but there was a dissatisfaction that this waiting time cannot be ignored.
[0014]
The applicant of the present invention has applied for artificial hair made of a mixture of polybutylene terephthalate and polyethylene terephthalate as a new artificial hair that can solve the problems in the conventional artificial hair (see Patent Document 1). .)
[0015]
The problem of the present invention is that, in view of the above-mentioned conventional situation, both the appearance after dyeing, the quality, and the difficulty of shrinking after elapse of time are better than that of artificial hair made of a mixture of polybutylene terephthalate and polyethylene terephthalate. It is to provide an artificial hair having a texture similar to that of hair and a matting method thereof.
[0016]
[Means for Solving the Problems]
Below, the structure of the artificial hair concerning this invention and its matting method is described.
First, the artificial hair according to the first aspect of the present invention is constituted by using PTT (polytrimethylene terephthalate) filaments as a material and mixing the PTT filaments with both silica and sulfate sulfate as alkalis .
[0017]
Next, the method for matting artificial hair according to claim 2 is a method for matting artificial hair using PTT (polytrimethylene terephthalate) filaments, and silica and sulfuric acid as fillers in the PTT filaments. It is configured to include a step of alkali treatment by mixing both VALUE.
[0018]
And in this matting method of artificial hair, for example, as described in claim 3, the mixing ratio of the silica to the PTT filament is 0.3 to 1.2%, and the mixing ratio of the sulfate sulfate is 0.2 to Configured to be 0.8.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
In recent years, PTT (polytrimethylene terephthalate) has been attracting attention as having a fiber property that combines the form stability of PET (polyethylene terephthalate) and the softness of nylon. This PTT is produced from propanediol and terephthalic acid using propanediol as the main raw material. Propanediol can be produced by chemical synthesis and biotechnology (fermentation) from corn. This has attracted attention as an environmentally friendly fiber.
[0020]
In addition to the fact that this PTT has no special dye yet created like other synthetic fibers and has the above-mentioned PET form stability and nylon softness, What is clear about other fiber properties is not yet known.
[0021]
The inventor of the present invention pays attention to this PTT, and sees this PTT and the technology already applied by the present applicant (see Patent Document 1) as an artificial hair having properties superior to conventional artificial hair. Various tests were conducted on PBT (polybutylene terephthalate), which is a material for artificial hair, and PET, and nylon 6 that has been mainly used as artificial hair, and their physical properties were compared. Nylon 66 has substantially the same physical properties as nylon 6, and therefore description and illustration are omitted here.
[0022]
FIG. 1 is a chart showing various test results for the above-described PET, PTT, PBT, and nylon 6 filaments. Synthetic resin filament characteristic chart 1 for various tests shown in the figure shows test items at the left end, and subsequently, to the right, test results for the above test items in the order of PET, PTT, PBT, and nylon 6. Is shown.
[0023]
The test items are as follows, from the top to the bottom of the left end of the chart: glass transition temperature (° C.), melting point (° C.), density (g / cm 3), strength (g / d), elastic modulus (Kg / mm ^ 2), 10% elastic recovery rate (%), 20% elastic recovery rate (%), and dyeing temperature (° C). In addition, since the dye used for dyeing has not yet been developed as a full-fledged dye for PTT, a dye that can be commonly used for PET, PBT, and nylon 6 was selected and used.
[0024]
In the test items shown in the figure, the glass transition temperature (° C.) is a characteristic related to curl maintenance when the synthetic resin filament is made into artificial hair. If this temperature is too low, The curl maintenance of artificial hair is reduced or disappeared only by the strong sunlight exposed to the sun.
[0025]
Therefore, only from this curl maintenance point, it can be seen that the glass transition temperature of PBT is 25 ° C., and among these four types, PBT should be excluded. Other PET, PTT, and nylon 6 are found to be satisfactory.
[0026]
In addition, the melting point, density, and strength of the test items are not so different from each other, and therefore, it cannot be judged superior or inferior from these test results.
The elastic modulus and elastic recovery rate of the test items are characteristics related to styling properties when these synthetic resin filaments are made into artificial hair. The styling property is that the artificial hair that is planted is easy to stand on, and it is difficult to sleep sideways, that is, it is difficult to become cat hair. If the elastic modulus and elastic recovery rate are large, it can be said that the styling property is good. .
[0027]
Therefore, only from this styling point of view, PET has a very high elastic modulus of 1000-1400 Kg / mm ^ 2, but the other elastic recovery rate is the lowest, so it is excluded from these four types. It turns out that it should be. Then, it can be seen that among the remaining three types including the PBT that should be excluded first, it is PTT that has both good elastic modulus and elastic recovery rate compared to the other. In particular, the 20% elastic recovery rate is particularly good, and it is found that PTT is exceptionally good from the viewpoint of styling.
[0028]
Nylon 6 not only has an elastic recovery rate lower than that of PTT, but also has the lowest elastic modulus. This endorses that artificial hair made of nylon 6 is more likely to become cat hair than before. Therefore, it can be seen that nylon 6 should be excluded from the viewpoint of styling as well as PET.
[0029]
The dyeing temperature of the test item is a characteristic related to the difficulty of dyeing. Dyeing is more difficult as the dyeing temperature is higher, and dyeing is easier as the dyeing temperature is lower. Looking at the test items of the dyeing temperature in the figure, the dyeing temperature of PET is the highest and decreases in the order of PBT, PTT, and nylon 6. The PTT dyeing temperature of 100 to 110 ° C. is a temperature in the vicinity of the boiling point of water, and can be easily dyed without using a high-pressure kettle. The dyeing temperature of nylon 6 is lower than that of PTT, but dyeing at a low temperature tends to cause discoloration, and PTT is considered excellent in dyeing difficulty from any point of view. Can do.
[0030]
In summary, it can be seen that the physical properties of the PTT filament are excellent as a material for artificial hair in any of curl maintenance, styling and dyeing difficulty.
[0031]
Next, in the PTT filament having excellent properties as artificial hair as described above, it is necessary to apply appropriate matting to make the appearance look like natural human hair as the next step.
[0032]
Usually, the synthetic resin filament as described above is etched with an aqueous alkaline solution when the surface of the artificial hair is matted. However, in general, a synthetic resin filament has a characteristic that resistance to etching with an alkaline aqueous solution is strong. PTT resin filaments are no exception.
[0033]
FIG. 2 is a table showing changes in physical properties when 100d × 24 filament fibers of 100% PTT are treated with alkali. Alkali treatment characteristic change chart 2 shown in the figure shows, from left to right, alkali treatment time, weight loss rate, shrinkage rate after weight loss, and strong elongation (strength, elongation). Also, from top to bottom, the state when raw yarn, the state when alkali treatment time is 1 hour, the state when alkali treatment time is 2 hours, the state when alkali treatment time is 3 hours, and the alkali treatment Each state is shown when the time is 4 hours.
[0034]
As the alkali treatment time gradually increases from 1 hour to 4 hours, the weight loss rate gradually increases to 7%, 16%, 26%, and 34%, but the shrinkage rate after weight reduction is 6. 7%, no difference.
[0035]
Further, the strength ranges from 246.1 g at the time of the raw yarn to 158.8 g at the alkali treatment time of 4 hours, depending on the length of the alkali treatment time, that is, as the weight loss rate increases. Although it is lowered, it has sufficient strength as artificial hair.
[0036]
Further, the elongation is 54.4% to 58.2% for the elongation of 41.0% at the time of the raw yarn, which is too long for the alkali treatment time, that is, the weight loss rate. There is no relationship, and growth has stopped at a certain point. This is also a desirable characteristic desired as artificial hair.
[0037]
Here, the amount of weight loss is a physical property related to the degree of matting of the raw yarn, but if the raw yarn is simply thinned by alkali treatment, it will not be matted, and moderate unevenness on the surface (Hereinafter referred to as a crater) must be formed. Further, if the alkali treatment takes too much time to reach a proper matte state, the efficiency is not increased and it is uneconomical. However, as shown in the chart of FIG. 2, the PTT resin has a strong resistance to etching with an alkaline aqueous solution.
[0038]
By the way, regarding the point that the filament fiber of synthetic resin is generally resistant to such matting etching, an appropriate inorganic filler is added when melting the synthetic resin when spinning as a fiber. It is known that this can be solved by supporting etching.
[0039]
Therefore, the matte test by etching was repeated while adjusting the addition amount of various inorganic fillers in order to perform the optimum etching by the alkali treatment on the PTT filament which has not been performed yet.
[0040]
In general, if matting is too much, it becomes completely opaque, and the color after dyeing becomes too vivid and looks unnatural. In addition, when the degree of matting is low, a transparent feeling is added to the color after dyeing, which also looks unnatural. Therefore, delicate adjustment is necessary for matting artificial hair.
[0041]
There are a wide variety of inorganic fillers used in the matting test, and the following are listed. That is, talc, calcium carbonate, mica, titanium oxide, zinc oxide, kaolin, alumina, barium sulfate, zinc sulfide, zinc white, manganese phosphate, zeolite, silica and the like.
[0042]
Using these inorganic fillers, the matte test was repeated by various methods. For example, 1% of titanium oxide, barium sulfate, zeolite, and silica were mixed at the time of spinning the PTT filament, respectively, and the amount of weight reduction by alkali treatment, that is, the degree of crater formation was verified. As a result, the effect of gloss, which seems to be optimal for artificial hair, was observed in the order of silica, zeolite, barium sulfate, and titanium oxide.
[0043]
Incidentally, the weight loss rates at this time were 20% for silica, 20% for zeolite, 35% for barium sulfate, and 35% for titanium oxide, respectively. In addition, the opacity of the filament was highest in zeolite, and gradually decreased in the order of silica, titanium oxide, and barium sulfate. In other words, it approached transparency.
[0044]
Here, it was decided to further test by changing the mixing ratio of the inorganic filler mixed during spinning. However, looking at the result of mixing 2% silica, even when the weight loss rate is 10% and the gloss that seems to be optimal for silica is obtained, it becomes too opaque and the color after dyeing becomes heavy, resulting in human nature. There was a tendency to be different from the color of the hair.
[0045]
Also, looking at the result of mixing 2% sulfuric acid value, even when the weight loss rate is 25% and the gloss that seems to be optimal for sulfuric acid value is obtained, it is now too transparent and the color after dyeing is too light In this case as well, there was a tendency to be different from the natural color of human hair.
[0046]
Therefore, not only one type of inorganic filler is used, but two types of inorganic fillers of silica and barium sulfate, which have obtained relatively good results in the above tests, are used in combination. By matting, we considered creating an optimal luster for artificial hair and an optimal opaque color after dyeing.
[0047]
In this test, when both silica and barium sulfate were combined and the mixing ratio was less than 0.5%, it was found that craters were hardly formed regardless of the passage of time for alkali treatment. Further, when both silica and barium sulfate were combined and the mixing ratio exceeded 2.0%, the filament strength was extremely lowered, and a tendency to be easily cut was observed. Further, as described above, silica alone becomes too opaque, and barium sulfate alone is too close to transparency.
[0048]
Based on these various test results, the test of mixing both silica and barium sulfate was repeated, and the mixing ratio of both silica and barium sulfate was 0.5 to 2.0%. In the total mixing rate, when the mixing rate of silica is 0.3 to 1.2% and the mixing rate of sulfate sulfate is 0.2 to 0.8, the artificial hair that the inventor has been looking for Succeeded in creating a color with optimal luster and optimal opacity after dyeing.
[0049]
【The invention's effect】
As described above in detail, according to the present invention, matting is performed by alkali treatment using PTT as a material for artificial hair and both silica and barium sulfate as inorganic fillers, so both appearance and quality after dyeing are achieved. It is possible to provide artificial hair having a texture similar to that of natural human hair and having high curl maintenance ability even after time, and a matting method thereof.
[Brief description of the drawings]
FIG. 1 is a chart showing various test results for PET, PTT, PBT, and nylon 6. FIG.
FIG. 2 is a chart showing changes in physical properties when 100d × 24 filament fibers of 100% PTT are treated with alkali.
[Explanation of symbols]
1 Synthetic resin filament characteristics chart 2 Alkali treatment characteristics change chart

Claims (3)

An artificial hair characterized by using PTT (polytrimethylene terephthalate) filaments as a material and mixing the PTT filaments with both silica and sulfite sulfate as fillers . A method for matting artificial hair using PTT (polytrimethylene terephthalate) filaments,
A method for matting artificial hair, wherein the PTT filament is mixed with both silica and sulfite sulfate as fillers and alkali-treated.   3. The artificial hair matte according to claim 2, wherein a mixing ratio of the silica to the PTT filament is 0.3 to 1.2%, and a mixing ratio of the sulfate sulfate is 0.2 to 0.8. Method.

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