JP2553038B2 - Method for improving color development of fiber structure - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for improving color development of a fiber structure, and more particularly to improving the fiber structure to a fiber structure having excellent color development and practical durability. On how to do.

[Conventional technology]

Synthetic fibers, especially polyester fibers, are widely used as general clothing materials because of their excellent functionality. However, when compared to other clothing fiber materials, polyester fibers are inferior in color development, and in the color development of dark colors, especially black, not to mention natural fibers such as silk and wool, and semi-synthetic fibers such as acetate and rayon. It is inferior to other synthetic fibers such as nylon and acrylic fibers, and is recognized as the greatest drawback of polyester fibers, and many studies have been made in the past to solve this problem.

The reason why the color of polyester fiber is low is that the refractive index of polyester polymer is higher than that of other fibers, so that the surface of the fiber reflects a lot of light and the dye existing inside the fiber does not absorb it sufficiently. This is because.

For the purpose of improving the color developability of this polyester fiber, many studies have been made in the past. For example, as the most direct improvement method, there is a method of forming a resin film having a low refractive index such as a silicon type or a fluorine type on the fiber surface to facilitate the incidence of light (JP-A-53-111192). However, it has not been put to practical use because it has no durability against washing and dry cleaning of resin.

In addition, the method previously proposed by the present inventors (Japanese Patent Application No.
58-118137), a non-uniform resin coating mainly composed of silicon oxide fine particles was previously formed on the fiber surface, and then an etching plasma treatment was applied to roughen the fiber surface and improve color development. However, since the uneven structure of the fiber surface is weak against friction and lacks in practicality, it has not been industrialized yet.

[Problems to be solved by the invention]

An object of the present invention is to provide a method for improving a fibrous structure into a fibrous structure which has excellent color development and abrasion resistance at industrial production level and has little discoloration due to washing and dry cleaning.

[Means for solving problems]

The present invention provides a dyed fiber structure from glycidyl ether of glycerin, glycidyl ether of polyoxyalkylene, acrylic acid ester or methacrylic acid ester having a polyoxyalkylene group in the molecule, and a silicone compound having a polyoxyethylene group. After applying a treatment liquid in which any water-soluble compound selected from the group and inorganic fine particles are essential components, and the weight mixing ratio of the water-soluble compound and the inorganic fine particles is 1: 0.05 to 1: 1 ,
A method for producing a fiber structure having improved color development, which is characterized by performing low-temperature plasma treatment.

As the water-soluble polymer used in the present invention, any water-soluble polymer having an alkylene oxide bond or and / or an epoxy group in the molecule can be appropriately used.

As a specific example, Such as an epoxy compound containing 1 mol or more of ethylene oxide, polyethylene glycol diacrylate, polyethylene glycol polypropylene glycol dimethacrylate, polyethylene glycol ω- (α, α-dimethacryloxymethyl) acetate ω'acrylate, and compounds such as the following. Can be mentioned.

(However, R ₁ and R ₂ are hydrogen or a methyl group, and 1 = 5 to 500.) (In the formula, R _{1 to} R ₃ are H or an alkyl group having 1 to 2 carbon atoms,
x, y and z are 0 or an integer of 1 to 20 and x + y + z is 3 to 2
0, one of the alkylene ether moieties must be ethylene oxide, and the number of moles is (x + y +
z) / 2 or more. A is -O -, - NH -, - CH 2 -, - S
O ₂ −, It means that one kind of group selected from the above or does not exist (the benzene nuclei are directly joined to each other). )Also (Here, R is an alkylene group and PoA is a polyoxyalkylene group.) Silicone compounds such as these are also used. These can be used alone or in combination of two or more.

Typical examples of the inorganic fine particles used in the present invention include colloidal silica and alumina sol. These are usually used in a state of being dispersed in water or a solvent.
The particle size of these fine particles is preferably 2mμ ~ 100mμ,
The range of 7 mμ to 80 mμ is preferable because a more stable effect can be obtained.

From the viewpoint of uniform coating property on the surface of the single fiber, it is preferable that these fine particles are previously made into cationic colloidal particles and then applied to the fiber structure. For such purpose,
If necessary, for example, a polyamideurea obtained by reacting urea, N-alkyliminobispropylamine and ε-caprolactam in a molar ratio of 1: 1: 1 to 1: 1: 10, (In the formula, RR is an alkyl group having 1 to 3 carbon atoms, a glycidyl group, and n is an integer of 1 to 10.) or this is reacted with epihalohydrin (epichlorohydrin or epibromhydrin, etc.) and / or formaldehyde. Obtained by water-soluble cationic polyamide, or dialkylamino ε-caprolactam and ε-
Water-soluble polyamide obtained by copolymerization with caprolactam, water-soluble cationic polyamide obtained by reacting epihalohydrin with this, or N-alkoxymethyl in the presence of alcohol, formalin, and acidic catalyst in the state of dissolving polyamide. And a cationic resin such as a water-soluble cationic condensate obtained from a condensate of a higher fatty acid and a polyalkyl polyamine or a lower amine such as dicyanine diamine.

The mixing ratio (weight) of the water-soluble polymer and the inorganic fine particles is such that the inorganic fine particles are 0.05 to 1 with respect to the water-soluble polymer 1. By such blending, a uniform resin film is formed on the surface of the single fiber. At a mixing ratio outside the above range,
Resin uneven adhesion is likely to occur, and the effect of the present invention is difficult to obtain.

In the present invention, a treatment liquid containing a water-soluble polymer and inorganic fine particles as described above is applied to a fiber structure and then low-temperature plasma treatment is performed to form a crosslinked resin film containing inorganic fine particles on the fiber surface. is there. As a method of applying the treatment liquid to the fiber structure, a method used in ordinary fiber processing can be used, and any method such as a pad-dry method, a pad-steaming method, or a bath treatment method can be used. Well, the point is to adopt a method capable of covering the fiber surface as uniformly as possible. It is necessary to add 0.2% or more of the resin to the fiber weight by a weight increase after drying, and it is preferable to add 0.4% or more from the viewpoint of processing stability.

Further, it is not necessary to apply the resin component in a larger amount than necessary, and a sufficient amount of 2% or more provides a sufficient effect.
The effect of the present invention is not limited.

The low temperature plasma treatment referred to in the present invention is the exposure of the fibers to the plasma generated by the discharge which is initiated and sustained by the application of a high voltage.

There are various forms of such discharge, such as corona discharge and glow discharge, but it is not particularly limited as long as it is a discharge form that does not cause thermal damage to the fiber, but improvement of color development due to uniformity of discharge Glow discharge is more preferable in order to obtain a uniform effect.

The glow discharge is a discharge that starts and continues when a high voltage is applied in a gas atmosphere under a low pressure, and the processing conditions such as discharge power and processing time vary depending on the type of resin, the processing apparatus, etc. In short, the conditions under which the effect of the present invention can be obtained by crosslinking the resin layer on the fiber surface can be selected.

The gases used for the electric discharge treatment are Ar, N ₂ , He, CO ₂ , CO,
Commonly used gases such as O ₂ and CF ₄ air can be used, but are not particularly limited, but in order to increase the crosslinking efficiency,
Non-oxidizing gases such as Ar, N ₂ , H ₂ , and CO can be used more preferably than oxidizing or etching gases such as O ₂ , CO ₂ , CF ₄ , and air. The smaller the amount, the better.

The ratio of oxidative gas mixed in depends on the pressure of the entire gas during glow discharge and cannot be generally stated, but it is 80% of the total.
The following is preferable and 50% or less is preferable. Mixing of oxidizing gas
If it exceeds 80%, etching of the crosslinked layer formed by the low temperature plasma precedes and formation of a resin film having good durability is hindered.

The fibrous structure referred to in the present invention refers to filaments such as synthetic fibers and natural fibers, woven and knitted products made of spun yarn and the like, non-woven fabrics and the like. Particularly large effects can be achieved when applied to fibrous structures.

〔Example〕

Next, the present invention will be described in more detail based on examples, but the present invention is not limited to these examples.

Example-1 A twill using a polyester processed yarn of 150 denier 48 filament was subjected to ordinary relaxx scouring, and then heat set at a temperature of 190 ° C. to obtain Dianix Black BG-FS.
15% owf, bath ratio 1:30, dyeing at 130 ℃ for 60 minutes,
It was reduced, washed, dried, and finally set at 170 ° C.

This black woven fabric was subjected to the following resin treatment and plasma treatment, and the degree of color development of the fabric, discoloration due to washing and dry cleaning, and whitening due to friction were evaluated.

To evaluate the color developability, the L value of the woven fabric was measured by a digital colorimetric color difference calculator (manufactured by Suga Test Instruments Co., Ltd.). The L value is an index of the visual density of color, and the smaller the value, the darker the color.

Discoloration due to washing and dry cleaning is performed three times by the methods specified in JIS L0844 and L0860, and the change in color compared to the untreated fabric is determined using the gray scale for discoloration specified in JIS L0804. Then, the grade was judged. The closer the grade is to the fifth grade, the less the discoloration is.

The whitening due to friction is performed by using the Gakushin-type friction tester specified in JIS L0849, and the degree of whitening of the test piece attached to the moving part when the same type of test cloth is rubbed 100 times Graded on a gray scale.

The treatment liquids listed below were applied to the black woven fabric by a usual resin processing method.

For resin processing, after dipping the fabric in the treatment liquid, apply 70% of the treatment liquid to the fabric weight with the mangle, then
It was dried in a dry heat of 0 ° C.

These resin treated fabrics were treated with a low temperature plasma obtained under the following conditions.

(1) ^* is shown by the following equation.

(Low-temperature plasma treatment conditions) Gas: Argon 30 C.C./min Decompression degree: 0.4 torr Applied voltage: 2.5 kv Treatment speed: 15 cm / min Measure the color development of these black fabrics, discoloration due to washing and dry cleaning, and friction whitening The results obtained are shown in Table-1.

As a result, only by the method of the present invention (treatment liquid: C,
It has been found that the required properties such as D, E) color developability, discoloration and fading due to washing and dry cleaning, and friction whitening can all be satisfied at the same time.

Example-2 The same black-dyed cloth as in Example-1 was used, the resin was similarly processed with the following treatment liquid, and the plasma treatment was then performed. The results of examining the performance are shown in Table-2.

(Plasma treatment conditions) Gas: Argon 20 C.C./min Decompression degree: 0.25 Torr Applied voltage: 2 kv Treatment speed: 15 cm / min It can be seen that the present invention can satisfy all the required characteristics.

〔The invention's effect〕

According to the present invention, a garment material having an improved color developability, which satisfies the product performance and is practical, can be produced on an industrial scale.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location D06P 1/613 D06P 1/613 (56) Reference JP-A-60-119280 (JP, A) Special features Kai 59-106568 (JP, A) JP 60-75673 (JP, A) JP 57-1435703 (JP, A)

Claims (2)

(57) [Claims] 1. A dyed fiber structure having a glycidyl ether of glycerin, a glycidyl ether of polyoxyalkylene, an acrylic acid ester or methacrylic acid ester having a polyoxyalkylene group in the molecule, and a silicone compound having a polyoxyethylene group. A water-soluble compound selected from the group consisting of and inorganic fine particles was used as an essential component, and a treatment liquid having a weight mixing ratio of the water-soluble compound and the inorganic fine particles of 1: 0.05 to 1: 1 was applied. rear,
A method for producing a fiber structure having improved color developability, which comprises performing low-temperature plasma treatment. 2. The inorganic fine particles are colloidal silica or /
And a method of producing a fiber structure with improved color developability according to claim 1, which is alumina sol.