JPH01282305A - Aromatic fiber and production thereof - Google Patents

Abstract

PURPOSE:To obtain an aromatic fiber having prescribed aroma for a long period by dispersing and mixing microcapsule powder enclosing a perfume with a specific thermoplastic polymer, discharging the resultant mixture through a spinning nozzle and forming fibers. CONSTITUTION:Microcapsule powder containing a perfume is homogeneously dispersed and mixed with a polyester based compound, such as polyester plasticizer, or an organopolysiloxane, such as dimethylpolysiloxane or diphenylpolysiloxane. The resultant mixture is then added to a molten polymer fluid of a thermoplastic polymer constituting a fiber having >=100 deg.C melting point during a period after completing the polymerization of the polymer and just before spinning. The above-mentioned polymer is then kneaded in a static mixer, etc., discharged from a spinning nozzle and formed into a fiber. Thereby, the aimed fiber excellent in washing durability is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for producing synthetic fibers having a fragrance.More specifically, the present invention relates to a method for producing synthetic fibers having a fragrance. The present invention relates to a synthetic fiber that can maintain a constant fragrance for a long period of time by being dispersed and mixed with the fibers, and a method for producing the same.

<Prior Art> Conventionally, a method of directly sprinkling fragrances on fibers and textile products has been used as a means of imparting aromatic properties to fibers and textile products. Although this is the simplest and most effective method, it lacks washing durability and long-term sustainability, and cannot be used in applications that require fragrance durability.

In addition, in order to impart aromatic properties to common synthetic fibers such as polyester and polyamide, there is a method in which aromatic components are incorporated into the fibers by kneading, compounding, etc. during spinning. 93714, Japanese Patent Application Laid-open No. 62-85010, etc., the molding temperature of polyester and polyamide is very high, so the fragrance sent into the molten polymer may decompose, react or react. It is expected that spinnability will be extremely difficult due to the gas generated.

Even if spinning were possible, many of the aromatic components contained in the yarn would have high boiling points. Aromatic properties are obtained through a well-balanced combination of various fragrance components with high to low boiling points, so it is important to ignore the balance of the combination and simply evaluate the state in which the fragrance is contained. Calling it aromatic is highly questionable.

In addition, it is possible to consider this situation in advance during spinning and limit the flavoring agents to be added to only those that are thermally stable, but the odor of the fibers obtained by such a method It is monolithic and does not give a sense of fragrance to humans.

<Problems to be Solved by the Invention> Therefore, the present invention provides an aromatic fiber in which an aromatic substance is contained in the fiber with a well-balanced combination of fragrance components, and the aromatic property can be maintained for a long period of time. The present invention aims to provide a method for manufacturing the same.

<Means for Solving the Problems> The present invention aims to reduce the temperature applied to the fragrance added during spinning and to reduce the temperature applied to the fragrance added during spinning in order to reproduce the original aromatic properties of fragrances such as blended fragrances as faithfully as possible in the form of fibers. The method was to suppress the volatilization of the volatile components of the fragrance due to the heat of the air.

As a result, polyoxymethylene with a melting point of 176'C was used as the thermoplastic resin that is the main component of the fiber, and the aromatic agent was encapsulated in microcapsules and dispersed in a dispersion medium, and then added to the thermoplastic resin. This led to the invention of a completely new aromatic fiber that involves dispersion, and a method for producing the same.

Polyoxyquinmethylene is represented by the molecular formula (1), and has a low melting point and excellent thermoformability -1-CH
20+rl(1) +CHzO+-+CHzCHzteCH2O7bushCH2C
H29(2) is most suitable for the present invention because of the fact that the resin is commercially available. Commercially available polyoxy/methylene copolymers with even lower melting points, such as Duracon manufactured by Polyplastics Co., Ltd., which has a molecular formula as shown in formula (2), have a melting point of 1.
A resin having a temperature of 65° C. is more advantageous as a resin for use in the present invention.

In the present invention, instead of using the fragrance as it is, a method is adopted in which the fragrance is first put into microcapsules and the fine powder of the microcapsules is kneaded into the fiber. By microcapsulating the fragrance, (1) the heat of the molten polymer is not directly transmitted to the fragrance during spinning and kneading, so decomposition and volatilization due to heat can be suppressed. (2) The volatilization of volatile components of the fragrance due to heat during spinning can be suppressed by covering the circumference υ with the microcapsules. (3) Since decomposition and generation of volatile gases are suppressed, spinnability is good. (4) Since the incense is gradually emitted through the pores of the microcapsules, stable aromatic properties can be obtained for a long period of time.

There are various methods of microencapsulating fragrances.

The present invention requires (1) a certain degree of heat resistance, (2)
) The fragrance has a sustained release property, and (3) it is easily dispersed in viscous liquid and is difficult to aggregate, and the diameter is such that the wall component is silicic anhydride and contains the same weight of the fragrance as the nuclide. Spherical microcapsules of 0.1μ were used. If grain a has a large atb, it is undesirable because there will be a lot of thread breakage such as fuzz and thread breakage during fiberization.

In order to disperse the microcapsule powder containing the fragrance into the thermoplastic fiber, it is dispersed uniformly in a liquid polyester compound or organic polysiloxane in advance, and heated to melt it while maintaining a certain degree of fluidity. Add to plastic resin fluid and knead with a static mixer.

The viscosity of the polyester compound or organic borea xane is 2
It is desirable that the temperature is 10 poise or more at 5°C. When it becomes less than 10 poise, the transferability increases and there is a greater risk that the fiber will be removed during washing. On the other hand, if the viscosity is extremely high.

If microcapsule powder is mixed, good fluidity may be lost, so higher viscosity is not necessarily better. Since the fluidity of the microcapsules to be mixed is greatly affected by the amount of microcapsules to be mixed, a material with a viscosity that provides appropriate fluidity after mixing should be selected.

Suitable examples of polyester compounds include polyester plasticizers such as ADK CIZER series manufactured by Adeka Argus, or POLYqIZER series manufactured by Dainippon Ink Chemical Co., Ltd. Among Luna's polyester compounds, heptabasic acid, Adipic acid,
It is appropriate to use a material containing phthalic acid as the main component and an appropriately selected glycol component in terms of cost and physical properties.

As organic polysiloxane, dimeter polysiloxane,
Examples include diphenylpolysiloxane and meterphenylpolysiloxane, which can be used alone or in combination.

The flavor used in the present invention is not special, and may be a liquid flavor such as various mixed flavors or food flavors.

The amount added to the fiber is a mixture in which the weight ratio of fragrance and microcapsule wall components is 50:50, and the weight ratio of fragrance-containing microcapsules and polyester compound or organic polysilocypone is 90:10 to 20:80. is added, and the microcapsules are 0.1 to 10% by weight based on the fiber.
It is preferable that 0.05 to 5% by weight of perfume and 0.1 to 10% by weight of a polyester compound or organic boroline compound are dispersed.

Next, the method for producing aromatic fibers of the present invention will be explained.

After accurately measuring a predetermined amount of a mixture of microcapsules containing a fragrance and a polyester compound or an organic polysilochitin, the mixture is added to a molten thermoplastic resin immediately before spinning,
A method in which the mixture is then kneaded and then discharged through a nozzle hole to form fibers is preferable because problems such as volatilization and decomposition of perfume components and a decrease in polymer viscosity occur.

What is important when kneading using a static mixer is that it is necessary to knead using a static mixer with a certain number of elements or more. Currently, there are several types of static mixers in practical use, such as the Ke
When using a static mixer made by NICS Corporation that divides the mixer into 2n layers by passing through n elements in which blades twisted 180° left and right are arranged at 90° shifts, it is necessary to use a mixer with 15 or more elements. If the number is less than 15 elements, uniform intermixing of the additive and the polymer is not sufficient, which increases the occurrence of yarn breakage and fluffing during spinning, and at the same time, the time extension property decreases, which is unfavorable in terms of process efficiency. From the point of view of improving process efficiency, it is desirable that the number of elements is 15 or more, that is, 2 or more layers.
Division into layers or more is preferred.

When using a static mixer other than KeniCs, 2.
Needless to say, it is necessary to use a mixer whose number of elements corresponds to division into 15 or more layers. Toshisha Hi-Mixer -? Charles &
In a Ross ISG mixer manufactured by Ross, etc., the number of layer divisions when passing through n elements is 4n layers, so the number of elements is 8 or more, preferably 10 or more.

An example of the manufacturing process of the present invention is shown in FIG. Melt extruder 1
A predetermined amount of the extruded molten polymer stream is measured by a measuring device 2. On the other hand, a mixture of microcapsules containing a fragrance and a polyester compound or an organic polysiloxane is fed by an additive feeder 4, and a predetermined amount is weighed by a weighing machine 3. added to the inside. Thereafter, the mixture and the polymer are kneaded in a static mixer equipped with a predetermined number of elements, and are discharged from the spinneret bag 6.
It becomes m. The static mixer may be placed into the polymer flowing in or within the spinneret pack.

〔Effect of the invention〕

The aromatic fiber of the present invention contains a fragrance in microcapsules,
Furthermore, by using a thermoplastic resin with a low melting point and thermoforming temperature, the decomposition and volatilization of the fragrance are minimized during dispersion into fibers and spinning, and the original aromatic properties of the fragrance are maintained.
Aromatic synthetic fibers with excellent washing durability have been made possible.

(Example) Hereinafter, the present invention will be specifically described with reference to Examples. The washing conditions in the examples were conducted according to the following test method.

Washing test method> Conducted according to JIS LO217-103 method, liquid temperature 4
Laundry detergent is added and dissolved at a ratio of 22 parts to 1 ton of water at 0°C to obtain a washing liquid. The sample and load cloth are put into this washing liquid so that the bath ratio is 1:30, and operation is started. After processing for 5 minutes, stop the operation, dehydrate the sample and load cloth with a dehydrator,
Next, replace the washing liquid with fresh water at room temperature, rinse for 2 minutes at the same bath ratio, and air dry. The above operation was repeated 10 times to obtain a measurement sample after 1oHL.

[Example 1] Acetal Copoly 1 manufactured by Polyplastics Co., Ltd.
-'Duracon Type M-90-44'' was extruded using a 40φ extruder, and the molten polymer line contained fumone flavor and microcapsules with a particle size of 0.1μ and a viscosity of 300 poise at 25°C. The mixture was mixed at a weight ratio of 40:60, thoroughly stirred using a horn mixer, and left as it was for 12 hours for defoaming. The dispersion medium was added at 2.9% by weight, the microcapsules at 0.76%, and the flavor at 1.14% by weight, and then kneaded with a 40-piece element made by KeliCB. The material was discharged through a nozzle and spun.

The spun yarn was stretched under normal conditions using a roller plate method to obtain a multifilament of 75 denier and 36 filaments. A knitted fabric was prepared and its aromatic properties were evaluated before and after washing 10 times, and it was confirmed that the fabric had the original fragrance both before and after washing.

[Example 2.3] Microcapsules containing a fragrance perfume in Example 2 and a cypress-like fragrance in Example 3 were prepared, and an organic polysiloxane having a viscosity of 600 poise at 25°C was used as a dispersion medium. According to the method of Example 1, aromatic fibers were obtained. Both sides exhibited excellent aromatic properties before and after washing.

[Example 4.5] Using the same microcapsules as in Example 1, the weight ratio of fibrocapsules and dispersion medium was 30 in Example 4, near 0.
In Example 5, the fiber was set to 25 near 5, and the aromatic fiber was obtained in the same manner as in Example 1. Processability and performance were also fully satisfactory.

[Example 6] The core component was a molten polymer obtained by kneading microcapsules in the same manner as in Example 4, and the sheath component was a similar acetal copolymer extruded from a separate line, with a core/sheath ratio of 90.
Core-sheath composite spinning was carried out so that the weight ratio was 135 denier/36.
A multifilament of filament was obtained. Both the aroma and processability were good, and the washing resistance was also sufficient.

[Comparative Example 1] Using the same microcapsules as in Example 1, a mixture of microcapsules and dispersion medium in a weight ratio of 5=95 was added to form fibers. Although it was aromatic, it was weak and the smell was not very strong.

[Comparative Example 2] As a dispersion medium, a viscous liquid made of a random copolymer of propylene oxide and ethylene oxide (POEO copolymer) with a viscosity of 200 poise at 25°C was used, and the weight ratio with the microcapsules was 30. The mixture was mixed so as to have a near-zero density, and the mixture was made into fibers in the same manner as in Example 4. Both spinnability and spreadability were good, and the fragrance before washing was also excellent, but after washing, the fragrance decreased significantly and washing resistance was not observed.

[Comparative Example 3] The same kneading agent as in Example 1 was added in an amount of 25% by weight based on the entire fiber, kneaded, and spun. The spinning situation was unstable as the yarn was shaking violently on the nozzle surface. Also, screws sometimes occurred, causing thread breakage. It was almost impossible to wind up the yarn to avoid poor spinnability.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an example of the manufacturing process of the present invention. Patent applicant RiRashi Co., Ltd.

Claims (3)

[Claims] (1) Microcapsule powder containing fragrance and 25℃
A liquid polyester compound having a viscosity of 10 poise or more or a mixture with an organic polysiloxane has a melting point of 10 poise or more.
An aromatic fiber having excellent washing durability characterized by being dispersed in a thermoplastic fiber having a temperature of 0° C. or higher in an amount of 0.1 to 10% by weight. (2) The fiber described in item 1, wherein the thermoplastic fiber is polyoxymethylene or a polyolefin having polyoxymethylene as a main component. (3) Microcapsule powder containing a fragrance and a mixture of a polyester compound or an organic polysiloxane are mixed between after completion of polymerization and immediately before spinning of a thermoplastic polymer constituting the fiber with a melting point of 100°C or higher. 1. A method for producing aromatic fibers, which comprises adding them to a molten polymer fluid, then kneading them, and then discharging them from a spinning nozzle to form fibers.