JPH02221468A - Fiber structure having fragrance - Google Patents

Abstract

PURPOSE:To obtain the title fiber structure having durability, retaining fragrant substance-containing microcapsules in pores of extremely porous layer of polymer constituting the fiber structure. CONSTITUTION:Fragrant substance-containing microcapsules comprising an organic polymer as a wall material are impregnated and retained in pores of extremely porous layer of polymer of fiber structure consisting of ground fabric (e.g. synthetic, semisynthetic or natural yarn) and the extremely porous layer of polymer to give a fiber structure having excellent washing resistance, durability and persistence of fragrance.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to fibrous structures, especially artificial leather-like articles, having a durable odor, especially a fragrance.

[Conventional technology]

Conventionally, various methods have been used to impart fragrance to fibrous structures.

For example, a method of applying microcapsules containing an odorant and a sizing agent to a textile product (Japanese Patent Application Laid-open No. 19197-1987), and applying a mixture of microcapsules containing a fragrance and an acrylic resin to obtain an fragrant towel fabric. Method (Unexamined Japanese Patent Publication No. 58-4
886), a method for obtaining a printed article emitting a fragrance by printing a printing paste consisting of a microcapsule of a fragrance coated with a paste wall film, a thermoplastic substance, and a thickener (
Japanese Patent Publication No. 53-47440.

JP 53-49200), fragrance microcapsules,
A method for obtaining an aromatic printed material that emits an aroma by heat-transferring a binder layer consisting of a dye, a polymeric resin, etc. to an object to be transferred (Japanese Patent Application Laid-open No. 53-106885). (Japanese Patent Application Laid-Open No. 48-36483), and a method of applying a mixture of a mixture of a polyamide resin and silica gel adsorbed with a fragrance, a resin binder, an organic solvent, and a rubber monomer (Japanese Patent Application Laid-Open No. 53-1983).
-52561), a method in which a powdered fragrance in which a fragrance is adsorbed to a fine silica powder is mixed with a pigment, and this aromatic pigment is used to print on cloth (JP-A-53-53408), a method in which a fragrance is mixed with a textile adhesive. A method of heat-sealing an interlining material coated on one side of the interlining material to a fiber material (Japanese Patent Application Laid-open No. 11900-1983)
0) After printing on cloth with printing paste mixed with fragrance and pigment, fragrance and resin liquid t! - A method of applying a mixed coating agent (JP-A-54-112283), a method of mixing fragrance powder into a pigment resin and printing it on terry cloth to obtain fragrant terry cloth (JP-A-58-87382); A method for obtaining a numbered textile product by immersing a fiber T//1 product in a processing bath containing a fragrance retaining agent and drying the solution (Japanese Patent Application Laid-Open No. 59150171), in which a fragrance is melt-spun into a fiber polymer. How to insert (Japanese Patent Publication No. 48-93714. Japanese Patent Application Publication No. 6
1-63716) etc.

[Problem to be solved by the invention]

However, such conventional methods have various drawbacks. For example, in the method of applying perfume microcapsules using a glue, the microcapsules fall off when the glue falls off during washing, resulting in poor washing durability and a hard texture. Furthermore, in the method of applying perfume microcapsules together with a resin binder, drying or low-temperature heating alone results in poor adhesion of the resin binder and poor washing durability. In addition, if heat fixation is performed at a high temperature after drying, the adhesiveness will improve, but the high temperature will change the quality of the fragrance, destroy the microcapsules due to vaporization of the fragrance, and harden the resin, resulting in a hard texture. There is a drawback. Methods in which fragrance is adsorbed onto porous powder or resin and applied using a glue or resin binder provide sustained release, but the initial release of fragrance is low and the effect is inferior, as well as the release of fragrance during storage. However, the storage period is short, and the fragrance adsorbed substances tend to be detached from the resin during washing, resulting in poor washing durability.

Furthermore, the method of applying fragrance directly together with an adhesive, pigment, and resin binder has the disadvantage that the preservation of the fragrance is extremely poor and the washing durability is also poor.

In addition, although the method of melt-spinning fragrances into synthetic fiber polymers is durable, it may impair the basic physical properties of the yarn (strength, elongation, etc.), the compatibility of some fragrances may be poor, and some fragrances may have low boiling points. They cannot be used, have limited scents, and those that undergo post-processing (dying, finishing, etc.) have the drawbacks of being limited in processing and not being able to process a wide variety of scents.

An object of the present invention is to provide a fiber structure that has an odor and has a long-lasting odor and durability.

[Means to solve the problem]

When microcapsules containing odorants are held in the pores of a microporous layer made of polymer, the microcapsules are less likely to fall off during washing, and mechanical breakage of the microcapsules held in the pores is less likely. The present inventor discovered that the odor is highly durable (persistent) because the odor progresses little by little during wear, and the present invention was completed based on this finding.

That is, the present invention provides a fiber structure having an odor, characterized in that microcapsules containing an odorant are retained in the pores of a polymer microporous layer of a fiber structure comprising a base fabric and a polymer microporous layer. It is.

In the present invention, the base fabric may be any ordinary woven fabric, knitted fabric, nonwoven fabric, etc., and the material may be synthetic fiber, semi-synthetic fiber, recycled fiber, natural fiber, or a mixture thereof.

The polymeric microporous layer is present on the surface and/or in the internal voids of the base 15 and has a diameter of mainly 5 to 50μ, preferably 5 to 20μ.
It has many holes. Such a layer is, for example, a well-known polyurethane wet-recycle coating and can be produced in a conventional manner. That is, a microporous layer can be created by applying a solvent solution of polyurethane to the substrate by coating or impregnating it and then wet-coagulating the polyurethane in water. The pore size can be adjusted by known methods; for example, in a coating method, increasing the concentration of the polyurethane solution reduces the pore size. The amount of the polymer microporous layer is, for example, 5 parts per 100 parts by weight of the base fabric.
~50 parts by weight.

The microcapsules used in the present invention are made of a wall material containing an odorant, and the microcapsule method itself is known. From the viewpoint of slowing down of odorants and mechanical strength of microcapsules, the wall agent is preferably an organic polymer, such as polyurethane, urea-formalin resin, etc., but is not limited to these. The size of the microcapsules must be in such a range that the microcapsules are trapped in the micropores, usually with an average size of 1
-50μ, preferably 5-10μ. Particularly preferably, the majority of the particle size distribution falls within the range of 5 to 10 microns.

The odorant is, for example, an aromatic substance with a pleasant odor to humans, a repellent for insects, etc. Fragrance substances include natural fragrances, synthetic fragrances, and aroma-producing compounds, either in liquid or powder form, singly or in mixtures. Examples of natural fragrances include animal fragrances such as musk, civet, castoreum, and ambergris, and examples of vegetable fragrances include lemon oil, rose oil, citronella oil, sandalwood oil, peppermint oil, and cinnamon oil. In addition, synthetic fragrances include α-pinene, limonene, geraniol, linalool, lavandulol,
There are mixed fragrances made of nerolidol and the like. The odorant is preferably encapsulated in an amount of 5 to 99% by weight, particularly 50 to 95% by weight, based on the total weight of the microcapsules.

There are mainly two methods for retaining such microcapsules in the pores of a microporous polymer layer.

One is a method in which microcapsules are added to a polyurethane solvent solution as described above, coated, and wet coagulated. Another method is to form a microporous layer using a polyurethane solvent solution that does not contain microcapsules, and then impregnate the microporous layer with a dispersion of microcapsules (preferably by pad nipping). In the latter case,
In order to further increase the durability of the microcapsules so that they do not fall off during washing or the like, the microcapsule dispersion may further contain a sizing agent, a binder, etc.

It is also possible to provide microcapsules only on part of the surface of the fiber structure.

The amount of microcapsules retained in the polymeric microporous layer can be varied as desired, and is generally 0% to the base fabric.
．． The amount is between 1 and 100% by weight, preferably between 0.2 and 10%.

The scented textile article of the present invention can be used in clothing such as jackets, synthetic leather, shoes and gloves, but is not limited to these uses.

Particularly, it is preferable to use it in sports gloves because the microcapsules are destroyed by the mechanical force when the gloves are worn, and the fragrance that eliminates the unpleasant odor caused by sweat is eliminated.

[Effects of the Invention] In the scented textile article of the present invention, the microcapsules are retained in the pores of the polymer microporous layer, so the microcapsules are less likely to fall off during use and washing. Microcapsules are mainly destroyed mechanically by external force and release odor, but when an external force is applied, the stress is dispersed by the polymer microporous layer, so many microcapsules are destroyed at once. It will not be done. For the above two reasons, the odor persists for a long period of time in the textile article of the present invention.

〔Example〕

The microcapsules used had diameters of 5 to 50% and consisted of 20% urea-formalin resin as a wall agent and 80% fragrance oil.
It is in the form of a slurry containing 45% by weight of 10μ microcapsules.

Example 1 The base fabric used was obtained as follows. That is, a split composite filament (50 denier/2B filament) consisting of 6-nylon having a cross-shaped filament cross-section and polyethylene terephthalate filling the space between them to form a circular filament cross-section was used as the back yarn and front yarn in a 28-gate tricot knitting machine. It was knitted into a knitted fabric. Next, the knitted fabric was sufficiently raised using a needle cloth raising machine, and then treated with benzyl alcohol to split the splittable composite fibers and shrink the knitted fabric (Example 1 of Japanese Patent Publication No. 53-20561). This was dyed using a conventional method and used as a base material.

100 parts by weight of polyurethane (CRISVON 8)
166: Registered trademark, Dainippon Ink Chemical Co., Ltd., solid content 30
%), 20 parts by weight of dimethylformamide, and 1 part by weight of microcapsule slurry. The resin concentration in the liquid is about 25% by weight, and the viscosity of the liquid is 20,000 C1)S (25°C).

Draw a doctor knife (thickness 4 ra) on one side of the above-mentioned base fabric.
The above resin solution was coated with. The resin remains near the surface of the coated substrate. Next, the substrate is passed through a pair of nip rollers. The linear pressure was approximately 30 to 9/α. After nipping, the polymer was wet coagulated by immersion in 40° C. water, followed by washing and drying.

The above steps were performed as a series of continuous steps. This was puffed and raised using a conventional method.

Even after washing the obtained product five times in accordance with JIS L-1042, the fragrance was clearly recognized.

Example 2 Taffeta (weave density 120x90) made of nylon 75d/36f for both warp and warp yarns was used as the base fabric, which was first scoured, then beam dyed (100° C., 40 minutes), and dried.

100 parts by weight of polyurethane (CRISVON 816
6: Registered trademark, Dainippon Ink Chemical Co., Ltd., solid content 30%)
and 30 parts by weight of dimethylformamide. The resin concentration in the liquid was 25% by weight, and the viscosity of the liquid was 15,000 C1)S (25°C).

A doctor knife (clearance 0.
2#Il+1> was coated with the above resin solution.

Thereafter, the polymer was wet coagulated by immersion in 40°C water, followed by washing and drying.

Microcapsules 1% and urethane elastomer (trademark: Elastone F-29, Daiichi Kogyo Seiyaku Co., Ltd.) 0.
The dispersion containing 5% was pad-nipped onto the fibrous structure (60%) and dried at 120°C.

When the obtained product was washed repeatedly in accordance with JIS L-1042 and the durability of the fragrance was tested, the fragrance was clearly recognized even after washing five times.

For comparison, when the microcapsule dispersion was similarly applied to nylon taffeta that was not coated with polyurethane, almost no scent was observed after washing twice.

Claims (1)

[Claims] A fiber structure having an odor, characterized in that microcapsules containing an odorant are retained in the pores of a microporous polymer layer of a fiber structure comprising a base fabric and a microporous polymer layer.