JPH05311539A - White fabric with stereoscopic structure - Google Patents

Abstract

PURPOSE:To provide the subject fabric excellent in stain eliminability in its washing and comfortableness in its use. CONSTITUTION:The objective fabric 1-50mm thick containing synthetic fibers incorporated with a fluorescent whitening agent in their manufacture. And a version of this fabric additionally incorporated with >=0.8wt.% of an aromatic polyester-polyether block copolymer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a white three-dimensional structure fabric suitable for car seats, bed covers and cushioning materials, which is excellent in stain removal properties during washing and comfort during use.

[0002]

2. Description of the Related Art Synthetic fibers generally have various characteristics such as high strength, excellent dimensional stability, and good dyeing fastness, and can be used for covering materials such as car seats and beds. ， Used very much for cushion materials. The cover material covers the car seats and beds to protect them from the dirt floating in the air and the dirt adhering to the human body.
It is used to keep car seats, beds, etc. clean at all times, and in terms of hue, it is often white and dirt is easily noticeable. For this reason, the cover material has to be repeatedly washed, and there has been a demand for improvement of stain removability during washing and prevention of recontamination. However, since synthetic fibers are hydrophobic, they have the drawback that dirt that is floating in the air and dirt that adheres to the human body is difficult to remove during washing and that redeposition is likely to occur during washing. When used, there was a problem that whiteness was reduced.

On the other hand, comfort that has been widely pursued in the field of clothing has come to be demanded also in the field of interior products and bedding, and the cover material used for them also has a comfortable sitting and sleeping comfort. There has been a strong demand for making products that take into account the comfort of the above, but the current situation is that satisfactory products have not yet emerged.

On the other hand, regarding a method for preventing recontamination by washing and a method for improving stain removability, (1) after pretreatment with an alkali, a hydrophilic agent having a functional group for an epoxy group and 2
A method of treating with a chemical having at least one glycidyl group (Japanese Patent Publication No. 50-13880), (2) adding a special surfactant, acid, water-soluble salt, etc. to an aqueous dispersion of polyester polyether block copolymer. Then, a method of treating in a treating solution within a specific set temperature (Japanese Patent Publication No. 53-46960),
(3) A method of pre-hydrophilizing the fiber so that it can be easily removed even if it becomes dirty, (4) By adding a fluorine-based water repellent,
Many methods have been proposed, such as a method for making dirt less likely to adhere, but none of them is sufficient. Regarding the former two (1) and (2), the processing is complicated, and the latter
In the hydrophilic treatment method of (3) and the antifouling treatment method of fluorine-based water repellent of (4), the finishing method is limited, and once stains start to adhere, it is difficult to remove Etc., each had its drawbacks.

The present inventors have previously found that the white dyed yarn has less redeposition property than the white dyed fabric with a fluorescent dye, and proposed this white fabric in Japanese Patent Application No. 3-167373. .. Compared to conventional white cloth, this white cloth is easier to remove stains during washing and has less dullness due to contamination, so that whiteness can be maintained for a long period of time.

[0006]

Although the white cloth has improved stain removal properties and recontamination prevention properties during washing, it is strongly demanded for car seat covers, bed covers, etc. It was not equipped with comfort such as comfort and sleep. The present invention has been made in view of the above circumstances, and it is an object of the present invention to obtain a white cloth which is excellent in stain removability during washing and recontamination resistance and is comfortable such as sitting comfort and sleeping comfort. It is intended.

[0007]

The present invention achieves the above object and has the following constitution. That is, the present invention relates to "a white three-dimensional structure cloth having a thickness of 1 to 50 mm, which is mainly composed of a synthetic fiber mixed with a fluorescent whitening agent at the time of manufacturing the fiber" and "the aromatic polyester polyether block copolymer, The above-mentioned white three-dimensional structure fabric characterized by containing 0.8% by weight or more of the above.

The present invention will be described in detail below. The synthetic fibers referred to in the present invention are synthetic fibers such as polyester-based, polyamide-based, polyacrylonitrile-based, and polyprolene-based fibers. In the present invention, a fluorescent whitening agent is previously mixed in a chip during the production of these synthetic fibers. Set it aside and spin it. Fluorescent brighteners include pyrene-based, oxazole-based,
Examples thereof include coumarin type, thiazole type, imidazole type, imidazolone type, pyrazole type, benzidine type, diaminocarbazole type, naphthalic acid type, diaminostilbene disulfonic acid type. Among these, an oxazole-based optical brightening agent having good whiteness and excellent acid resistance can be preferably used. It is desirable to use 0.01 to 0.3% based on the weight of the fiber as the amount of incorporation into the fiber. The one in which the optical brightening agent is mixed into the fiber at the time of manufacturing the fiber by such a method is more excellent in the removability by washing with water than the one which is fluorescent whitened by the ordinary post-dyeing method.

The three-dimensional structure fabric of the present invention is mainly composed of the above synthetic fibers. In addition to these synthetic fibers, other fibers, for example, natural fibers such as cotton, hemp, wool and rayon,
A semi-synthetic fiber such as acetate may be used by means such as mixed spinning, mixed fiber, mixed weaving, and mixed knitting. The three-dimensional structure fabric here means a three-dimensional woven fabric or a three-dimensional knitted fabric that emphasizes the dimension in the thickness direction. Specific three-dimensional woven fabrics include fibers in the warp direction such as belt weave and triple weave. A multi-connected textured fabric composed of fibers in the transverse direction or a multiaxially textured fabric in which a large number of fibers in a direction orthogonal or oblique to this are woven between rows of a plurality of fibers to make each fiber three-dimensionally organized. Examples of the three-dimensional knitted fabric include a warp knitted fabric knitted by a warp knitting machine having a double needle bed, and the ground knitted fabrics knitted on the front and back sides are formed by intermediate connecting fibers. An example is an integrated three-dimensional knitted fabric.

The three-dimensional structure fabric of the present invention has a thickness of 1 to 50.
However, if the thickness is less than 1 mm, the desired comfort such as sitting comfort and sleeping comfort cannot be obtained, while if the thickness exceeds 50 mm, the car must have a thickness of less than 1 mm. It is not suitable because it becomes difficult to sew on a seat cover or bed cover, and repeated washing becomes difficult. For the cover material for seats such as car seat covers,
A thickness of 3 to 20 mm is suitable, and the bed cover has a thickness of 5
A thickness of ~ 30 mm is preferred.

It is essential that the white three-dimensional structure fabric of the present invention contains an aromatic polyester polyether block copolymer in order to improve the oily stain removability in a washing bath. Aromatic polyester polyether block copolymer means a block copolymer composed of terephthalic acid and / or isophthalic acid and alkylene glycol and polyalkylene glycol, and when used, it is an emulsion in which the copolymer is dispersed in water. Used in the form of. The emulsion may be applied to the white three-dimensional structure cloth by any method such as impregnation pad method and exhaust method, and is not particularly limited.

In addition, in the present invention, in order to obtain outstanding durability, it is necessary to make the above block copolymer adhere to the cloth in a solid content of 0.8% or more based on the weight of the cloth. Yes, preferably 1-5%. Adhesion amount is 0.8
If it is less than%, the stain removability becomes insufficient and the washing durability is poor, and even if the adhered amount exceeds 5%, no significant improvement in stain removability is observed, which is rather economical. Will be at a disadvantage. The present invention has the above-mentioned constitution, and a so-called "white dyed yarn" in which a fluorescent whitening agent is kneaded into a synthetic fiber is used to form a three-dimensionally structured cloth, and an aromatic polyester polyether block copolymer is added to the cloth. It has a feature in the combination of.

[0013]

With respect to the conventional white fabric by post-dyeing, only the one having a low negative zeta potential, which is the fiber surface potential, can be obtained due to the dye and the auxiliary agent during the dyeing. On the other hand, since the synthetic fiber constituting the fabric of the present invention is a synthetic fiber in which a fluorescent whitening agent is mixed at the time of manufacturing the fiber, the negative zeta potential of the fiber surface potential is higher than that of the post-dyed white fabric. Since the repulsion action in the washing bath against solid particle dirt such as carbon black and iron oxide is large, it is possible to improve the solid particle dirt removal property and recontamination prevention property during washing.

When an aromatic polyester polyether block copolymer is attached to such a fiber, the surface tension of the fiber surface against oily stains is lowered, and therefore the oily stain removability in the washing bath can be further improved. it can.

The white three-dimensional structure fabric of the present invention is a three-dimensional fabric in which the dimension in the thickness direction is emphasized. Therefore, by effectively utilizing the thickness, the cool feeling required for the comfort required for the cover material and the cushion material is obtained. It is equipped with heat resistance, heat retention and cushioning. For the above-mentioned reason, the white three-dimensional structure fabric of the present invention can be used as a cover material or a cushioning material for car seats, beds, etc., which is highly comfortable with less deterioration in whiteness even after repeated washing.

[0016]

EXAMPLES Next, the method for producing the white three-dimensional structure fabric of the present invention will be specifically described by way of examples. In the examples, the measurement and evaluation of the stain removal performance by washing the fabrics were carried out by the following methods.

(1) Stain removal property by washing A. Test method with synthetic pollution source 0.75 g of synthetic pollution source, 5 g of sodium tripolyphosphate, laurylbenzene sulfonic acid in which the following oily pollutant and dry pollutant were mixed in a ratio of 3: 1 5 g of soda was dispersed in 1 liter of distilled water to prepare a contaminated liquid.

[Oil Contamination Agent] [Dry Contamination Agent] Stearic acid 12.5% by weight Clay 55.0% by weight Oleic acid 12.5 〃 Portraland Cement 17.0 〃 Hardened oil 12.5 〃 Ferric oxide 0 .5 〃 Olive oil 12.5 〃 γ-decane 8.75 〃 Cetyl alcohol 8.5 〃 Carbon black 1.75 〃 Solid paraffin 21.5 〃 Silica gel 17.0 〃 Cholesterol 5.0 〃 Total 10.0 wt% Carbon black 15.0 〃 Total 100.0% by weight

Next, using a rounder meter tester used for the JIS-L-0844 wash fastness test method, 200 ml of the recontamination liquid and 10 steel balls used for the wash fastness test method were put into a test bottle. 5 cm x 5 cm
Put 4 pieces of white cloth of the test piece cut in
The treatment was performed at ± 2 ° C for 1 hour. After that, the test cloth is taken out and rinsed with running water.
After washing with a rounder meter for 10 minutes in 10 ml, remove the test piece, rinse it with running water, and re-immerse it in water at 25 ° C.
The sample was washed with a rounder meter for 10 minutes with 10 ml, rinsed under running water twice, then dehydrated and dried with a tumbler. After drying, the grade was evaluated with a contamination gray scale. Judgment was carried out in 5 stages, and it was shown that the 5th grade had no contamination and was good, and the 1st grade had significant contamination (darkening).

B. Test method by soil and sand pollution source A sample was cut into 20 cm x 20 cm, and two samples and JIS-
3 g of sand of Z-8901 (fine grain of Kanto loam layer) was enclosed in a plastic bag, put in a test box of a pilling tester, treated for 1 hour, then taken out of the plastic bag, Matsushita Electric Co., Ltd.
Fully automatic washing machine NA-5580 type manufactured by Mfg. Co., Ltd. was used to wash with New beads (Kao Co., Ltd.) 0.5 g at 40 ° C. for 10 minutes, and after rinsing at room temperature for 5 minutes, Dehydrated and dried. After drying, the gray scale for contamination was used to determine the 5 ranks. The 5th grade shows the state where the soil is completely removed, and the 1st grade shows the state where the soil is not removed at all.

(2) Seating comfort A car seat cover was sewn, covered with a car seat, and a sensory test was performed to evaluate the seating comfort as follows. ○ Good cushioning and very comfortable sitting △ Inadequate cushioning and poor sitting comfort × Poor cushioning and poor sitting comfort

Example 1 A chip in which yeast bright OB-1 (oxazole-based optical brightener manufactured by Eastman Kodak Company) was mixed in 0.1% with respect to the weight of polyethylene terephthalate was melted at 285 ° C. and spun. It was fed to a die and spun at a temperature of 280 ° C, and wound up at 1500 m / min. Next, temperature 90 ℃, magnification
Stretched at 3.2 times and heat-set at 150 ℃ to 150d / 30
F and 30d / 12f white dyed polyester filament yarns were obtained. No problems such as yarn breakage occurred, and the spinnability was good. Using a double Raschel machine, the above polyester filament yarns 150d / 30f for both the front and back fabrics
The polyester filament yarn 30
Using d / 12f, the front and back sides have a course density of 47 / inch, a wale density of 22 / inch, a thickness of 5 mm, and a basis weight.
A 320 g / m ² double Raschel knitted fabric was knitted into a white three-dimensional structure fabric.

Then, in a bath containing a nonionic surfactant,
℃, 10 minutes relax, scouring, dehydration, drying,
Then, after using the processing bath of the following prescription 1 at 130 degreeC for 30 minutes, it dried and final set by the usual method and the white three-dimensional structure cloth of this invention was obtained. [Formulation 1] SR1000 8% owf (aromatic polyester polyether block copolymer,
Takamatsu Yushi Co., Ltd. product)

For comparison with the present invention, a white solid for comparison was prepared in exactly the same manner as in this example, except that the aromatic polyester polyether block copolymer was omitted from the treatment bath of formulation 1 in this example. A structural fabric (Comparative Example 1) was obtained. In the production of the white three-dimensional structure fabric in this example, a knitted fabric that was spun without using a fluorescent whitening agent during yarn production and knitted in the same manner as in this example was relaxed and refined by a usual method, Ubitex EBF (product of Ciba-Geigy, fluorescent whitening agent for post-dyeing) using a high-pressure beam dyeing machine
A white post-dyed three-dimensional structure fabric was obtained by performing white dyeing at 130 ° C. for 30 minutes with 1% owf.

This white post-dyeing three-dimensional structure fabric is used in this Example 1.
After being placed in a treatment bath having the formulation 1 of Example 1 and treated under the same conditions as in Example 1, drying and final set were performed by a usual method to obtain a white three-dimensional structure fabric for comparison (Comparative Example 2). .. Further, for comparison with the present invention, a white knitted polyester filament yarn 150d / 30f obtained in this example was used to knit a smooth knitted fabric having a basis weight of 200 g / m ² and a thickness of 0.5 mm with a circular knitting machine. , White cloth was used. This cloth was relaxed, scoured, dehydrated, and dried by the same method as in this example, and then treated in the treatment bath of Formulation 1 of this example under the same conditions as in this example, and then dried and final set. Then, a white cloth for comparison (Comparative Example 3) was obtained. The performances of the white fabrics of the present invention and Comparative Examples 1 to 3 were measured, and the results are also shown in Table 1.

[0026]

[Table 1] As is clear from Table 1, the white three-dimensional structure fabric of the present invention was excellent in stain removability by washing and was also comfortable.

[0027]

EFFECTS OF THE INVENTION The white three-dimensional structure fabric of the present invention has an effect of easily removing oily stains, water-based stains and stains caused by dust such as earth and sand by washing, and has a cushioning property due to the three-dimensional structure. It also has coolness and heat retention. The car seat cover, bed cover, and cushioning material using the white three-dimensional structure fabric of the present invention have excellent comfort such as sitting comfort and sleeping comfort, and can maintain whiteness for a long time even after repeated washing.

Claims (2)

[Claims] 1. A white three-dimensional structure cloth having a thickness of 1 to 50 mm, which is mainly composed of a synthetic fiber in which a fluorescent whitening agent is mixed during the production of the fiber. 2. The white three-dimensional structure cloth according to claim 1, wherein the aromatic polyester polyether block copolymer is contained in an amount of 0.8% by weight or more based on the cloth weight.