JPH01272875A - Aromatic nonwoven fabric and aromatic sheet - Google Patents

Abstract

PURPOSE:To obtain a durable aromatic nonwoven fabric having sufficient persistence, by applying a mixture prepared by blending microcapsules containing a perfume with a silicone based resin binder at a specific weight ratio to an elastomer fiber nonwoven fabric. CONSTITUTION:A mixture emulsion prepared by blending microcapsules conthining a perfume with a silicone based resin binder (e.g., polyorganosiloxane) at 2:1-1:5 weight ratio is applied to an elastomer fiber nonwoven fabric (e.g., spunbonded nonwoven fabric of an ester based polyurethane) and the resultant fabric is heat-treated to provide 0.3-7% pickup of the above-mentioned mixture based on the weight of the nonwoven fabric. Since the aroma is neither evaporated or lost in a breath, sufficient persistence is exhibited according to the afore- mentioned method.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention provides a nonwoven fabric having an aromatic property, specifically an elastic fiber nonwoven fabric, with microcapsules containing a fragrance attached thereto to impart a durable fragrance. This invention relates to nonwoven fabrics and sheets.

(Prior Art) Conventionally, various developments have been made regarding fragranced clothing, and many of them have been on the market. However, many of these products are simply sprayed with perfume onto the final product, or simply coated with fragrant substances on the surface, and the fragrance disappears when the fragrance evaporates, and wash resistance is affected. The fragrance was so poor that it completely disappeared after one wash.

Therefore, processing methods to maintain the fragrance for a long period of time are disclosed in Japanese Patent Publication No. 53-47440 and Japanese Patent Application Laid-open No. 54-11228.
Many proposals have been made, including Publication No. 3.

Under these circumstances, various attempts have been made to impart fragrance to nonwoven fabrics and sheets. Conventionally, this method involves spraying perfume at the time of finishing, or enclosing aromatic paper in a packaging bag during packaging, or using aromatic paper as the core, and transferring the scent to non-woven fabric or sheets. Met.

Furthermore, JP-A No. 61-63716 proposes an aromatic core-sheath type composite fiber in which a fragrance is dispersed and mixed in the core and has a hollow part, but the fragrance usually evaporates at temperatures above +50°C. There was a problem in that the perfumes that could withstand melt spinning were limited because of the deterioration in quality.

(Problems to be Solved by the Invention) However, it goes without saying that the sheet obtained as described above has poor fragrance durability, and the fragrance completely disappears after just one washing. It had extremely low commercial value.

Furthermore, the fragrance quickly evaporates when it comes into contact with the outside air while being worn, and some products even maintain their fragrance for only a few hours after being worn.

In addition, in cases where the scent of aromatic paper is transferred to the sheet inside the packaging bag, the strength of the aroma varies depending on the time that has passed after the bag is sealed, and as a result, the scent is not pleasant and the product itself may be defective. There were cases where this happened.

In view of the above-mentioned circumstances, the present inventors have conducted repeated studies with the aim of imparting a durable fragrance to an elastic nonwoven fabric, and have found that using microcapsules containing a fragrance is suitable for fragrance processing. We obtained the knowledge that

However, the present invention provides a method that maintains the fragrance by attaching microcapsules containing a fragrance to an elastic non-woven fabric, and that the microcapsules are not torn little by little due to friction during use or are intentionally rubbed. This method focuses on the fact that the divergence effect is achieved by However, JP-A-49-19197 and JP-A-52-312
Sufficient durability can be obtained by simply attaching microcapsules and a binder to a nonwoven fabric, as disclosed in Japanese Patent Application No. 00, or by using a transfer printing method, as disclosed in Japanese Patent Application Laid-open No. 106885/1985. It is not possible to impart a certain fragrance, and there are also problems such as the binder penetrating into the weaving and knitting yarns resulting in an extremely hard texture, or the transferred part having a different texture and peeling off when washed. occured.

The present invention was made based on the above-mentioned knowledge, and it is possible to achieve "desirable fragrance emission" and "fragrance sustainability" without impairing the texture and stretchability of the elastic fiber nonwoven fabric itself. The object of the present invention is to provide aromatic nonwoven fabrics and sheets that can satisfy the above effects.

(Means for Solving the Problems) That is, the present invention provides an elastic fiber nonwoven fabric to which fragrance-containing microcapsules are attached, wherein the ratio of the microcapsules to the silicone resin binder is 2:1 to 1:5. (
The aromatic woven fabric and its sheet are given by weight ratio) and the amount of both of them is 0.3 to 7.0% of the weight of the nonwoven fabric on the attached part.

A preferable processing method for this aromatic nonwoven fabric and sheet is to soak an elastic fiber nonwoven fabric that has been previously treated with water repellent treatment and a treatment agent containing a mixture of fragranced microcapsules and a silicone resin binder, padding, There is a method of applying it by a coating method or a printing method.

In the present invention, the elastic fiber nonwoven fabric refers to a nonwoven fabric made from known elastic fibers by, for example, spun-pond, needle punch, or wet methods, and the elastic body may be a polyurethane elastic body, a polyester elastic body, or a combination thereof. Mixed yarns such as blends or doublings with natural fibers or synthetic fibers may be used. Also, from the viewpoint of binder adhesion, fibers with unevenness such as cotton, porous fibers with macrovoids, etc., or fibers with a binder may be used. It is advantageous to mix compatible fibers.

Furthermore, it is preferable that the nonwoven fabric used in the present invention is previously treated with water repellent treatment to prevent the binder from penetrating into the fabric and hardening the texture. Known methods can be used for water-repellent treatment that does not impair the original texture and elasticity of nonwoven fibers, but for applications that do not require 1B aqueous properties, simply impregnating with a relatively small amount of treatment agent and then drying is sufficient. For example, a method of impregnating and drying an emulsion made by adding an emulsifier and a protective colloid to aluminum acetate and paraffin, a method of impregnating and drying an emulsion with an emulsion of methylhydrodieneborinloxane and a metal soap, and then heat-treating. There is.

The term "sheet" used in the present invention refers to a sheet that uses elastic fiber nonwoven fabric at least in part, for example, a composite sheet that is integrated with elastic fabric, such as interlining, uniforms, work clothes, slacks, lingerie, sportswear, etc. shorts,
Can be used for casual wear, bandages, diapers, etc.

The composition of the fragrance-containing microcapsules used in the present invention is not particularly limited as long as it can be broken by appropriate friction and emit a fragrance, but low-formalin microcapsules are preferred.

Therefore, the particle size is usually about 5 to 20 μm, and the capsule thickness is 0.3 to 3 μm, preferably 0.5 to 20 μm.
It is 1.5 μm. Various manufacturing methods have been developed for microcapsules, and a representative example is the method described in Japanese Patent Publication No. 37-7724.

The silicone resin binder used as a binder is
It has a coating effect and plays a role as an adhesive between the microcapsules and the knitted fabric, and is mainly made of silicone-based aqueous emulsion type, such as organopolysiloxane, which has excellent dispersibility in water and can be easily diluted with water. Preferably, the component is emulsified with an emulsifier, which hardens upon removal of water to form a rubbery film having the characteristics of silicone rubber, and provides a durable adhesive effect.

This coating material is applied to the microcapsules.
It is applied 5 to 5 times, preferably 1 to 2 times (weight ratio), and exhibits a sufficient adhesive effect. If the amount is less than 0.5 times, the coating effect will be extremely poor, while if it is more than 5 times the amount, the adhesion rate of microcapsules will hardly change, and on the contrary, there will be problems with the texture and elasticity of nonwoven fabrics and sheets. In addition, the amount of both of these substances usually accounts for 0.3 to 7.0%, preferably 0.5 to 3.0%, of the weight of the nonwoven fabric in the adhered portion. That is, since microcapsules can be sufficiently attached to nonwoven fabrics by being provided with a silicone resin binder in the above proportion, if the amount of both of these substances attached is less than the above 0.3%, it will not be fragrant. Both the strength and durability of the
On the other hand, if it exceeds 7.0%, it affects the texture and elasticity of the nonwoven fabric, and there is also the problem that the fragrance sometimes emitted becomes too strong, both of which are unsuitable. In other words, the above-mentioned amount of adhesion satisfies all the requirements of having a desirable scent dispersion effect, a suitable texture and flexibility, and the fragrance having appropriate durability.

It is also preferable to apply a silicone resin binder to final products such as interlining, work clothes, and lingerie that do not undergo a post-processing process.The silicone resin binder is preferably applied to final products such as interlining, work clothes, and lingerie that do not undergo any post-processing. You just need to dehydrate and dry it in a way that does not damage it.

(Example) The following five types of nonwoven fabrics or sheets were subjected to dehydration treatment according to a conventional method (dehydration softener: mainly composed of methylhydrodiene polysiloxane). In addition, microcapsules containing fragrance of urea resin log/f! (jasmine fragrance, average particle size 8 μm, membrane rg -1 μm) was mixed with 20 g/l of silicone-based aqueous emulsion containing epoxy-modified dimethylpolysiloxane resin as the main component.Then, the amount of microcapsules attached was determined by the weight of the nonwoven fabric or sheet. The emulsion was immersed in a nonwoven fabric or the like so that the pick-up rate was 0.45%, and then centrifugally dehydrated so that the pick-up rate was 100%, dried, and heated at 120 to 130° C. for 1 minute. The nonwoven fabric or sheet to which the fragrance-containing microcapsules were attached in this manner was dried according to a conventional method and sent to a final setting process to produce an aromatic nonwoven fabric or an aromatic sheet.

■ Spunbond nonwoven fabric of ester polyurethane (fabric weight 10g/rrr) ■ Spunbond nonwoven fabric of polyester ether elastic (fabric weight 10g/rrr) ■ Two-dle punch nonwoven fabric of ester polyurethane fiber (fabric weight 50g/+rf)■ ■ Composite sheet made by integrating non-woven fabric and nylon weft knitted fabric using a heat roll ■ Composite sheet made by integrating non-woven fabric and nylon/spandex interwoven knit using a heat roll The combination was tested.

The washing resistance test was conducted according to the JIS LO217401 method, and was expressed as the number of times until the fragrance disappeared. In addition, the fragrance was evaluated by 10 people on a 5-point scale (0 points are given for those emitting the optimal fragrance, +1 and +2 are given for those that are too strong above and below that, and -1 and -2 are given for those that are too weak). do)
The average score was taken as the evaluation score. In addition, regarding the feel, those that the same <10 people felt were good, slightly inferior, and inferior were set as 01-1 and -2, respectively, and the average score was used as the evaluation score.

These results show that the aromatic nonwoven fabric and sheet of the present invention have achieved the objectives of our laboratory, namely: 1. They have a durable and pleasant fragrance, good texture, and elasticity. It will become clear that there is.

(Effects of the Invention) The present invention achieves the following effects with the configuration described above.

First, since the fragrance-containing microcapsules are attached to the nonwoven fabric or sheet, the capsules break little by little during wear or by intentional friction, releasing a suitable fragrance. Therefore, the fragrance does not emanate and disappear all at once, but has sufficient sustainability.

In addition, by applying a silicone resin as a binder to the microcapsules in an appropriate proportion, the adhesive strength and adhesion properties are significantly improved, and the desired adhesion amount and fragrance durability are achieved.

The processing method does not require complicated processing steps, and the processing agent according to the present invention is applied by applying a processing agent containing a mixture of microcapsules and a silicone resin binder in an appropriate ratio, and performing a heat treatment. This is a method that can reliably produce nonwoven fabrics and sheets.

Claims (2)

[Claims] (1) An elastic fiber nonwoven fabric to which microcapsules containing a fragrance are attached, in which the microcapsules and a silicone resin binder are provided in a ratio (weight ratio) of 2:1 to 1:5, and the adhesion of both microcapsules and silicone resin binder is 2:1 to 1:5. The aromatic nonwoven fabric accounts for 0.3 to 7.0% of the weight of the nonwoven fabric in the attached area. (2) An aromatic sheet made from the aromatic nonwoven fabric according to claim 1 and a stretchable fabric.