JP3864011B2 - Insect repellent and textile products - Google Patents

Description

【００３３】
表１で示されるように、本発明の防虫繊維は、初期および耐久性試験においてダニの忌避性能が低下することなく安定して効果を持続発現することができる。繊維表面にポリオキシエチレンアルキルエ−テルを処理しなかった比較例１および処理量の少なかった比較例２はダニの忌避率が低く、効果が不十分であった。また、比較例３では繊維表面のベトツキが激しく、商品価値のないものであった。
【００３４】
【発明の効果】
本発明の技術は、熱可塑性合成繊維に練り込まれた有機系薬剤を繊維表面にブリ−ドさせて薬剤自身が有する機能または性能を初期から耐久性よく発現させる有効なものである。すなわち、本発明の防虫繊維は初期からダニ等の害虫に対してその防虫、忌避性能が発揮され、かつその忌避性能が低下することなく長期に安定した効果を持続発現する耐久性を有するものであり、敷物、布団中綿、側地および毛布等に有効に使用することができる。なお、本発明繊維の繊維形状は、フィラメント等の長繊維；ステ−プル等の短繊維のいずれでもよいことは無論である。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an insect-repellent fiber used for a textile product in which mite inhabiting is pointed out, such as a rug, a batting, a side cloth, and a blanket, and provides an insect-repellent fiber excellent in initial performance and durability of the insect-repellent function. Is.
[0002]
[Prior art]
Conventionally, insect repellent fibers called tick repellent fibers are kneaded into a fiber having a repellent or / and repellent effect (hereinafter sometimes abbreviated as an insect repellent) attached to the fiber surface by post-processing or into the fibers. The rare one has been commercialized.
[0003]
[Problems to be solved by the invention]
However, a product obtained by attaching an insect repellent to the fiber surface by post-processing can provide a temporary effect on the initial consumption performance, but the effect may be significantly reduced by home laundry or industrial laundry. On the other hand, when an insect repellent is kneaded into the fiber, the effect tends to decrease during the washing process, but it does not decrease significantly, but the initial effect is low. .
[0004]
The present invention has been made to solve the above-mentioned problems, and the post-processing of the insect-repellent agent kneaded fiber and the insect-repellent agent, whose initial high-consumption performance is extremely low in the process of washing and the like An object of the present invention is to provide an insect-repellent fiber having both the performance of the fiber obtained by the above method.
[0005]
[Means for Solving the Problems]
In order to seek durability of insect repellent performance, it is premised on a kneaded fiber in which an insect repellent is kneaded into the fiber, but this type of fiber has low initial performance, and as a result of investigating its cause, It has been found that there is a problem with the spread of the kneaded insect repellent to the fiber surface. Therefore, the present invention has been intensively studied on a technique for satisfactorily bleeding an insect repellent on the fiber surface, and has arrived at the present invention.
[0006]
By the way, although the aim of processing to fibers is different, there has been a white discharge method as a technique for dyeing textile products. This is a technique in which the dye (dye molecule) of the object to be dyed is blended onto the fiber surface using a chemical and decolorized by oxidation or reduction. As the chemical, a surfactant is usually used, and a discharging agent. It is called.
Some antistatic agents reduce friction fastness, and this is presumed to have the same effect as the above-mentioned discharge agent and to cause the dye to blade on the fiber surface.
As described above, it is known that when a surfactant or an antistatic agent is attached to an object to be dyed, it has the ability to cause the dye molecules to be spread near the fiber surface.
[0007]
In the present invention, an insect repellent agent is kneaded into a synthetic fiber, and the insect repellent agent in the fiber is well-blended on the fiber surface, thereby improving the initial performance of the insect repellent agent and exhibiting its ability over a long period of time. It is intended to realize the fiber.
[0008]
That is, the present invention of claim 1 is provided on the surface of a thermoplastic synthetic fiber containing 0.1 to 5.0% by weight of an insect repellent or / and repellent substance mainly composed of phthalic acid. An insect repellent fiber formed by applying 0.2 to 10.0% by weight of any one of an antistatic agent, a surfactant, and a smoothing agent, wherein the antistatic agent or the surfactant is a polyoxyethylene alkyl ether, An insect repellent fiber characterized in that the smoothing agent is an amino-modified silicone compound or / and dimethylpolysiloxane.
[0009]
Examples of the thermoplastic synthetic fiber of the present invention include polyesters such as polyethylene terephthalate, polypropylene terephthalate, and polybutylene terephthalate; polyamides such as nylon 6, nylon 66, and nylon 12; polyethylene, polypropylene and the like Examples of such polyolefins include ethylene-vinyl alcohol copolymers, but are not necessarily limited thereto. These may be used alone or as a mixture or copolymer of two or more.
[0010]
The target fiber of the present invention is a single fiber composed of a single component kneaded with an insect repellent, or a component kneaded with a repellent agent as a core component and a component not kneaded with a repellent agent as a sheath component The core-sheath type composite fiber may be used.
[0011]
In the case of the former fiber, an antistatic agent, a surfactant, or a smoothing agent that bleeds the kneaded insect repellent (hereinafter, these may be abbreviated simply as a bleed accelerator) is used for the fiber. What is necessary is just to apply | coat to the surface, and in the case of the latter fiber, the bleed promoter should just take the system knead | mixed in a sheath component. In the present invention, in the case of a composite fiber, the bleed accelerator is not only contained in the sheath component but also contained in the sheath component, and is not contained in the sheath component, but is applied onto the fiber surface to apply the bleed promoter to the composite fiber. The case where it exists on the surface is also included.
[0012]
Application and adhesion on the fiber surface may be carried out by employing the usual application means and conditions such as the antistatic agent, and kneading into the sheath component is the same as kneading the insect repellent. A kneading means may be employed.
[0013]
As the insect repellent that is kneaded and contained in the fiber, a substance mainly composed of phthalic acid such as phthalic acid esters is used.
[0014]
If the content of the insect repellent is less than 0.1% by weight, the insect repellent effect cannot be exerted, and if it exceeds 5% by weight, the fiberization is hindered. Therefore, the content is 0.1 wt% or more and 5.0 wt% or less. More preferably, it is 0.2 to 1.0% by weight.
[0015]
As a bleed accelerator to be coated or kneaded on the surface of a fiber or a surface part, an antistatic agent or surfactant made of polyoxyethylene alkyl ether, or a smoothing made of amino-modified silicone compound and / or dimethylpolysiloxane. Use the agent.
[0016]
The amount of the bleed accelerator adhering to the fiber upper surface needs to be 0.2 to 10.0% by weight. When the adhesion amount on the fiber is less than 0.2% by weight, the amount of the blade of the kneaded insect repellent to the fiber surface is low, and the performance of the repellent is insufficient. On the other hand, if the adhesion amount exceeds 10.0% by weight, the stickiness on the fiber surface increases, which is not preferable economically. A preferable adhesion amount is 0.5 to 3.0% by weight.
[0017]
Alternatively, the content in the case where the bleed accelerator is contained in the inner surface portion of the fiber needs to be 0.1 to 5.0% by weight. When the content in the fiber is less than 0.1% by weight, the amount of the blade of the kneaded insect repellent to the fiber surface is low, and the performance of the repellent is insufficient. On the other hand, if the content exceeds 5.0% by weight, it is not preferable for fiber production. In this case, it is more preferably 0.5 to 3.0% by weight.
[0018]
For example, when an insect repellent is kneaded into the core of a core-sheath composite fiber made of polyester, some amount of the insect repellent is blended into the sheath component due to the heat of the spinning stage, and in some cases even smoke is generated. is there. However, if the amount of the drug present on the fiber surface is very small even when subjected to the heat as described above in the spinning process, and no measures are taken to positively improve the bleeding property, the fiber of the insect repellent drug used The amount of the drug present near the surface is only about 0.4% with respect to the amount of the drug kneaded in the core, which is insufficient for exhibiting the insect repellent effect.
On the other hand, when a 2% aqueous solution of polyoxyethylene alkyl ether as a bleed accelerator is applied to the surface of the core-sheath composite fiber, and then heat treated at 130 ° C. for 5 minutes, the fiber surface of the drug The amount of the drug present in the vicinity increases to 5.0% with respect to the amount of the drug kneaded in the core portion, and good performance can be obtained in the initial stage and in washing in terms of consumption performance.
[0019]
It is an interesting phenomenon that even if a bleed promoter is present not only on the fiber surface but also on the inner surface of the fiber, the bleed is promoted to the fiber surface by the insect repellent, and in fact, the activity of the fiber This is also effective from the viewpoint of durability of performance.
That is, for example, about the core-sheath type polyester composite fiber in which dimethylpolysiloxane as a bleed promoter is kneaded into the core part into which the insect repellent agent is kneaded, the amount of the drug that has been bled on the fiber surface Can reach 3.7% with respect to the same amount of drug kneaded in the core, and the repellent rate by the intrusion prevention method has increased to the 90% range, confirming that good repellent performance is exhibited. . Further, in order to investigate the durability of this fiber, it was shown that even when the fiber was subjected to an accelerated test at 81 ° C./52 hours, the repelling rate hardly changed and the performance was maintained for a long time.
[0020]
【Example】
EXAMPLES Hereinafter, although an Example demonstrates this invention more concretely, this invention is not limited to these Examples at all. In the present invention, the performance evaluation was performed by the following intrusion prevention method.
[0021]
<Intrusion prevention method>
A dish having an outer diameter of about 90 mm and a height of 15 mm is fixed on an adhesive sheet, and a mite culture medium is placed on it. Then, a small chalet having an outer diameter of 35 mm and a height of 10 mm is placed in the center of the chalet. A test sample previously cut to a diameter of about 35 mm is laid on this small dish, and 0.05 g of powdered feed containing no mites is placed in the center. This set is stored in a plastic container for preserving food with saturated saline and 75 ± 5% Rh with adhesive sheet, and 24 hours (+2 hours) in an incubator under all dark conditions of 25 ± 1 ° C. Within) After breeding, count the total number of live mites. The same is done for the control feed.
The test is repeated 5 times in consideration of variation, and the repelling rate is calculated from the total number of live mites on each sample. The repelling rate was calculated by the following formula.
[0022]
Repellent rate =
(Number of invading ticks in the control group−number of invading ticks in the test area) / number of invading ticks in the test area × 100
[0023]
The analysis of the drug concentration was performed by the following method.
<Analysis of drug concentration>
(1) Total weight of the drug: 2 g of raw cotton was extracted with chloroform and then quantified by gas chromatography. The numerical value indicates the amount of drug in 200 mg of raw cotton.
(2) Surface concentration analysis: 2 g of raw cotton was quantified by liquid chromatography after the fiber surface was washed with methyl alcohol. The numerical value indicates the amount of drug in 200 mg of raw cotton.
[0024]
Moreover, durability evaluation is evaluation in the following process.
(1) Heat resistance evaluation: Performance evaluation after treating sample cotton at 81 ° C. for 52 hours.
(2) Washing durability: L-0217 Method 103 Performance evaluation after 3 washes.
[0025]
Example 1: Polyethylene terephthalate pellets were blended with a phthalic acid-based insect repellent at a blending amount of 12% by weight, and then kneaded at a temperature of 280 ° C. with a single screw extruder to prepare a master chip. Obtained.
This master chip was mixed and diluted with a polyethylene terephthalate containing no drug to obtain a core component polymer (insect repellent concentration 1% by weight). As the sheath component polymer, polyethylene terephthalate containing no drug was used.
Both the above-mentioned component polymers are supplied to the core and sheath of the core-sheath composite spinning device, respectively, and spun at a core discharge rate of 390 g / min, sheath discharge rate of 390 g / min, and a spinning temperature of 295 ° C. A core-sheath composite fiber was obtained at a take-off speed of 900 m / min. The fiber was drawn, crimped, and heat-treated by a known method to obtain a short fiber raw cotton having a denier 6d and a cut length of 51 mm.
Polyoxyethylene alkyl ether was applied to the raw cotton so that it was 2.0% by weight on the fiber surface, and then heat treated at 130 ° C. for 5 minutes to obtain the insect-proof fiber of the present invention.
[0026]
Example 2: The raw cotton of Example 1 was used, and in place of the polyoxyethylene alkyl ether used in the same Example, a reactive amino-modified silicone and a diaminosilicone were mixed on a one-to-one basis. After applying 0.3% by weight of the solution, heat treatment was performed at 130 ° C. for 5 minutes to obtain insect-proof fibers.
[0027]
Example 3 As the core component polymer, the same insecticide concentration 1% by weight polymer as in Example 1 was used. As the sheath component polymer, after obtaining a master chip blended with 11% by weight of dimethylsiloxane, polyethylene terephthalate containing no drug was mixed and diluted to use polyethylene terephthalate containing 1% by weight of dimethylsiloxane.
The core component polymer and the sheath component polymer are respectively supplied to a core-sheath type composite fiber spinning device, and spun at a discharge rate of 390 g / min. A short fiber raw cotton containing a surfactant was obtained.
[0028]
Comparative Example 1: As a core component polymer, the same insect repellent as in Example 1 was blended with polyethylene terephthalate pellets in a blending amount of 12% by weight, and then kneaded at a temperature of 280 ° C. in a single screw extruder. A master chip was obtained, and this master chip was mixed with a drug-free polyethylene terephthalate and diluted to obtain a polymer containing 1% by weight of the insect repellent. As the sheath component polymer, polyethylene terephthalate containing no drug was used.
The core component polymer and the sheath component polymer were supplied to a core-sheath type composite spinning apparatus, spun at a discharge rate of 390 g / min, at a spinning temperature of 295 ° C., and a core-sheath type composite fiber was obtained at a winding speed of 900 m / min. . The fiber was drawn, crimped, and heat-treated by a known method to obtain a short fiber raw cotton having a denier 6d and a cut length of 51 mm.
[0029]
Comparative Example 2: Using the raw cotton of Example 1, 0.1% by weight of polyoxyethylene alkyl ether was applied to the fiber surface of the raw cotton, followed by heat treatment at 130 ° C. for 5 minutes to obtain insect-proof fibers. .
[0030]
Comparative Example 3: Using the raw cotton of Example 1, 12.0% by weight of polyoxyethylene alkyl ether was applied to the fiber surface of this raw cotton, followed by heat treatment at 130 ° C. for 5 minutes to obtain insect-proof fibers. .
[0031]
Table 1 shows the characteristics of the insect repellent fibers obtained in the above Examples and Comparative Examples.
[0032]
[Table 1]

[0033]
As shown in Table 1, the insect repellent fiber of the present invention can stably and continuously exhibit the effect without lowering the mite repellent performance in the initial and durability tests. In Comparative Example 1 where the polyoxyethylene alkyl ether was not treated on the fiber surface and Comparative Example 2 where the treatment amount was small, the mite repellent rate was low and the effect was insufficient. In Comparative Example 3, the fiber surface was very sticky and had no commercial value.
[0034]
【The invention's effect】
The technology of the present invention is effective in causing the function or performance of the drug itself to be expressed with good durability from the beginning by causing an organic drug kneaded into a thermoplastic synthetic fiber to be bladed on the fiber surface. That is, the insect-repellent fiber of the present invention has the durability to exert its insect repellent and repellent performance against pests such as ticks from the beginning, and to continuously express a stable effect for a long time without lowering the repellent performance. Yes, it can be used effectively for rugs, futon batting, side fabrics and blankets. Of course, the fiber shape of the fiber of the present invention may be a long fiber such as a filament or a short fiber such as a staple.

Claims (3)

Antistatic agent, surfactant or smooth on the surface of thermoplastic synthetic fiber containing 0.1-5.0 wt% of insect-repellent and / or repellent substance mainly composed of phthalic acid An insect repellent fiber formed by applying 0.2 to 10.0% by weight of any of the agents , wherein the antistatic agent or surfactant is polyoxyethylene alkyl ether, and the smoothing agent is an amino-modified silicone compound or / Insect repellent fiber characterized by being dimethylpolysiloxane . Among the core component, antistatic agent, surfactant or smoothing agent, a thermoplastic polymer containing 0.1 to 5.0% by weight of an insecticidal or / and repellent substance mainly composed of phthalic acid An insect-repellent fiber comprising a core-sheath composite fiber containing a thermoplastic polymer containing 0.1 to 5.0% by weight of at least one of the following as a sheath component , wherein the antistatic agent or surfactant is polyoxy An insect-repellent fiber, which is an ethylene alkyl ether, and the smoothing agent is an amino-modified silicone compound or / and dimethylpolysiloxane . A textile product comprising the insect repellent fiber according to claim 1 or 2 .