JP2602315Y2 - Wiping cloth - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention has excellent wiping characteristics, and also has excellent water absorption, touch and texture.
The present invention also relates to a wiping cloth having less fluff on the wiping surface.

[0002]

2. Description of the Related Art Conventionally, Japanese Patent Publication No.
Japanese Unexamined Patent Publication No. 1-58573 discloses a nonwoven fabric ultrafine fiber woven or knitted fabric, or a cloth made of splittable composite fibers of nylon and a polyester-based polymer.

[0003]

However, although such conventional wiping cloths are excellent in wiping performance, they lack water absorption, and the texture is not satisfactory because of the so-called synthetic fiber-like feel. In particular, at present, in pursuit of fashionable and highly sensitive products, the delicate touch and texture of natural fibers are also being demanded in the field of wiping cloths.

A cloth containing a large amount of natural fibers is proposed in, for example, Japanese Patent Application Laid-Open No. 61-228821, but such a cloth in which a large amount of natural fibers are located on the outermost surface of a cloth is used as a wiping cloth. In the case of use, it has also been pointed out that a problem that fluff comes off and adheres to the surface of a lens or the like.

SUMMARY OF THE INVENTION In view of the prior art, it is an object of the present invention to provide a wiping cloth which is excellent in wiping characteristics, water absorbency, feel, feel, and the like, and has less fluff on the wiping surface.

[0006]

Means for Solving the Problems The present invention has the following structure in order to solve the above problems. That consists of natural fibers and a single fiber fineness 0.001-0.5 denier synthetic fibers, the natural fibers as a core, the synthetic fiber around it
A wiping cloth composed of a woven or knitted fabric using a composite yarn wound with a fiber as a sheath, wherein the wiping cloth has a natural fiber content of 20 wt% or more, and at least one surface has an area ratio of 80% on the outermost surface. % Or more is covered with a synthetic fiber having a single fiber fineness of 0.001 to 0.5 denier.

The synthetic fiber used in the wiping cloth of the present invention has a single fiber fineness of 0.001 to 0.5 denier, preferably 0.01 to 0.2 denier. When the single fiber fineness exceeds 0.5 denier, the wiping performance becomes insufficient. On the other hand, there is a tendency that it is difficult to obtain synthetic fibers having a density of less than 0.001 denier, yarns are easily broken, and there is a problem in durability as a wiping cloth.

[0008] Such synthetic fibers can be obtained, for example, by a method using a super draw method or a method of removing or splitting sea-island composite fibers or split composite fibers composed of two or more polymer components.

[0009] Examples of the polymer constituting such synthetic fibers include polyester, polyamide, polyvinyl alcohol, polyolefin, and polystyrene.
In the case of desealing or splitting a conjugate fiber, a polyester and a polystyrene, a copolyester obtained by copolymerizing a polyester and a sulfoisophthalic acid, and a combination of a polyamide and a polyester can be applied.

For example, when a multifilamentary sea-island composite fiber is used, it is usually preferable to arrange polyester in the island component and copolyester obtained by copolymerizing polystyrene or sulfoisophthalic acid in the sea component. In the split type composite fiber, polyamide is arranged radially from the center,
An example having a cross-sectional shape in which a polyester component is divided into a plurality of phases in the polyamide phase and then composited is preferably used.

In the present invention, among such synthetic fibers, the thinner, and the sharper the cross section is, the better the wiping effect is. It is preferable to use such a modified cross-section fiber alone or in combination with a round cross-section fiber because the wiping effect is improved.

The natural fiber used in the wiping cloth of the present invention is a known fiber represented by cotton, silk, wool, other animal hair, hemp, etc., and these may be used alone or in combination of two or more natural fibers. Are blended and used.

In the wiping cloth of the present invention, at least one surface has an outermost surface area ratio of 80% or more, preferably 9% or more.
0% or more is covered with the synthetic fiber having the specific single fiber fineness. When the area ratio is less than 80%, the wiping performance becomes insufficient.

In the present invention, the area ratio of the outermost surface is
In a case where the cloth is used as a wiping cloth in a usual manner, the synthetic fiber of the specific single fiber fineness occupies an area in which the synthetic fiber having the specific single-fiber fineness is in contact with the specific object, of the entire portion (outermost surface) that contacts the object such as a lens. This means the ratio, specifically, the area ratio measured by the following method disclosed in JP-A-62-289665.

That is, as shown in FIG.
m, while moving the fabric sample 3 on the support roll 5 having a diameter of 500 mm at a speed of 5 m / min.
6 cm of sand film (# 600) 4 radially and evenly provided, 50 cm wide, 50 cm in diameter including the sand film
A rubbing pressure of 15 k is applied to the rotating body of 0 mm so that the rough surface of the sand film is hit in the direction opposite to the moving method of the fabric.
Rotate at 200 rpm with g / 50 cm width and scrape the fabric surface. At this time, as shown in FIG. 6, the minus clearance, that is, the length of the overlapping portion between the sand film 4 and the support roll 5 is 15 mm.

At least 2 thus rubbed off
A magnified photograph of the surface of the cloth of mm × 2 mm is taken with an optical microscope at a magnification of 100 to 200 times. In this enlarged photograph, the sum of the areas of the rubbed portions is A, and the sum of the areas of the rubbed portions of the synthetic fibers of the specific single fiber fineness is B. From these, (B / A) × 100
The value obtained in [%] is used as the area ratio in the present invention.

[0017] The wiping cloth of the present invention contains a natural fiber content of 20 wt% or more, preferably 30% or more. If the content is less than 20 wt%, the improvement of water absorption, touch and texture, which are the objects of the present invention, cannot be expected. As described above, from the viewpoint of facilitating the area ratio of the synthetic fiber having the specific single fiber fineness occupying the outermost surface to be 80%, the content of the natural fiber is preferably less than 80%.

For natural fibers, the ratio of the area occupied by the outermost surface is not particularly specified. However, on the surface used as a wiping cloth (one side or two sides),
The area ratio of the outermost surface is necessarily less than 20%. Natural fibers are inferior in wiping characteristics and cause fluff to fall off. Therefore, it is better not to be located on the outermost surface of the surface used as a wiping cloth as much as possible. However, the more natural fibers are contained, the higher the water absorbing effect and water retaining effect, and a good touch and feeling unique to natural fibers can be imparted. If one side of the fabric is used as a wiping cloth and the other side is used for a purpose other than the wiping cloth (for example, a handkerchief), it is also useful to devise a method such as placing a large amount of natural fibers on the other side. It is.

In the wiping cloth of the present invention, as a method for mixing the above-mentioned synthetic fibers having a specific single fiber fineness with natural fibers, a knitted fabric is manufactured by manufacturing long and short composite yarns as disclosed in JP-B-63-31568. Constitute.

In the present invention, as a specific method for achieving the above-mentioned area ratio of 80%, for example, when a long and short composite yarn is used, the synthetic fiber having the specific single fiber fineness is used for the sheath portion. In the case where cotton is used for the warp and synthetic fiber having the specific single fiber fineness is used for the weft, the warp is made to have a weft floating structure by means of applying tension to the warp by mercerizing (mercerizing) or the like. When using wool or a blend of wool and polyester with a total fineness equal to or less than that of the warp yarn, we use a warp floating structure without applying a large tension to the warp yarn. It is possible to arrange the synthetic fibers of the specific single fiber fineness on the outermost surface by 80% or more.

[0021]

As the woven fabric, a plain woven structure is usually applied, but any woven structure such as a satin woven structure, a twill woven structure, a satin woven structure, and a horizontal satin double woven structure can be applied.
Further, as described above, a so-called reversible fabric may be used in which a double fabric is used, and ultrafine synthetic fibers are provided on one side and natural fibers are provided on the other side.

The knitted fabric may be either a warp knit or a weft knit, but from the viewpoint of facilitating at least one surface having an outermost surface area ratio of 80% or more, a double knitted fabric is used. Is preferred.

The wiping cloth may contain a resin or a heat-fused fiber as long as the object of the present invention is not impaired. Further, for example, a material obtained by calendering at least one surface, a needle punching or water jet punching treatment, or a brushing treatment may be used.

In the present invention, in the case where the specific single fiber fineness is obtained by dewatering or splitting the conjugate fiber, usually, a known dewatering process or splitting process is performed after forming the fabric as described above.

FIG. 1 shows an example of a long and short composite yarn constituting an example of the woven or knitted fabric of the present invention. In this case, a natural fiber yarn 2 is used as a core, and an ultra-fine fiber yarn 1 is wound around it as a sheath. Has been.

[0027]

EXAMPLES (Example 1, Comparative Examples 1 to 5) Various plain fabrics were obtained by using a polymer mutual array fiber and a No. 80 cotton yarn. The basis weight was 100 g / m ² .

The fibers of the polymer inter-arrays contain 61.25: 26.25: 12.5 of a terephthalic acid, isophthalic acid or sulfoisophthalic acid as a dicarboxylic acid component as a sea component.
Copolyester copolymerized with ethylene glycol as the diol component, polyethylene terephthalate as the island component, and an island / sea ratio of 90/1.
It is a filament having a denier of 50 and a denier of 630 with 0 being the number of islands. The single fiber fineness assuming that the island component was taken out was 0.07 denier. When the polymer mutual array is a warp and the 80th cotton yarn is a weft (Comparative Example 1), the 80th cotton yarn and one polymer mutual array fiber are alternately used for the warp, and the 80th cotton yarn ( Various types of plain woven fabrics were prepared, in which Comparative Example 2) was driven, in which a polymer mutual array fiber was used for both a warp and a weft (Comparative Example 3), and when a cotton yarn was used for both a warp and a weft (Comparative Example 4). ,
After dissolving the sea component copoester by hot water treatment, it was cut into a size of 40 cm × 40 cm to obtain a wiping cloth.

Further, a long and short composite yarn using a cotton yarn of No. 60 as a core yarn and the above-mentioned high molecular array fibers as a sheath yarn was prepared to produce a plain woven fabric with a basis weight of 200 g / m ² (Example 1). . Similarly, long and short composite yarns were prepared using the above-mentioned polymer mutually aligned fibers as the core yarn and No. 60 cotton yarn as the sheath yarn, to prepare a plain woven fabric with a basis weight of 200 g / m ² (Comparative Example 5). About these, after dissolving the copolyester of the sea component by performing a hot water treatment, 40 cm × 40 c
m to obtain a wiping cloth.

Each of the above wiping cloths (Example 1, Comparative Examples 1 to 5) was evaluated for wiping characteristics, water absorbency (JISL 1096, dropping method), touch, hand, and fluff.

The wiping characteristics were evaluated as follows. About 5 mg of silicone oil SH200 (manufactured by Dow Corning Silicone Toray Co., Ltd.) is dropped on a glass plate with a syringe needle, and a cloth (cushion having a thickness of about 1 mm) is attached to one end of a cylindrical weight having a diameter of 450 mm and a weight of 1 kg. Material)
A wiping cloth sample fixed by a rubber band is placed on a glass plate and moved at a speed of 1 m / min to wipe off the silicone oil. Sprinkle the toner for the dry copier on the glass plate, and after blowing off with compressed air, attach cellophane tape (registered trademark, manufactured by Sekisui Chemical Co., Ltd.) to the surface of the glass plate to peel off the residual toner on the glass plate. This is determined by visual observation on white paper. Those with little toner observed (the oil film on the lens was wiped out almost completely) were evaluated as grade 5, and those with very large amount of toner observed (the oil film on the lens almost remained) were graded as 5 grades. did.

The hand and hand were evaluated by sensory evaluation based on touch.

In the case of fluff dropping, the wiping cloth sample was fixed in the same manner on the same weight as that used for the evaluation of the wiping characteristics, and was similarly moved on the glass plate at a speed of 1 m / min without using silicone oil. After that, the fluff remaining on the glass plate was visually observed.

Table 1 shows the evaluation results.

[0035]

[Table 1] When long and short composite yarns were used, the wiping characteristics of the wiping cloth of Example 1 using synthetic fibers of a specific single fiber fineness as the sheath yarn were good.

In all of Comparative Examples 1, 2, and 4 using cotton yarn as the weft, the ratio of synthetic fibers having a specific single fiber fineness to the outermost surface of the fabric was extremely small, and the wiping characteristics were inferior.

The wiping cloth of Comparative Example 3 using synthetic fibers of a specific single fiber fineness for both the warp and the weft has excellent wiping characteristics, but has problems in water absorption, hand feel, hand feeling, and the like. This woven fabric had a warp floating structure instead of a weft floating structure because it did not undergo mercerizing.

Further, it was recognized that the fabric in which a large amount of cotton yarn was exposed on the outermost surface tended to have fluff after wiping the lens.

As described above, the area ratio of the synthetic fibers of the specific single fiber fineness which appears on the outermost surface is large, and the cotton as a whole is 20 watts.
The cloth containing t% or more had excellent wiping properties and good water absorption, touch, and feeling, and hardly fluffed off.

(Example 2, Comparative Examples 6 and 7) A polyethylene terephthalate yarn having a single fiber fineness of 0.15 denier, a total fineness of 150 denier and a number of filaments of 1000 was obtained by a direct spinning method. On the other hand, ramie (hemp) having an average fineness of 7.8 denier and an average fiber length of 120 mm was spun by a usual method to obtain a ramie yarn having a Nm (meter number) of 1/20.

A circular knitted fabric having a basis weight of 370 g / m ² was knitted using long and short composite yarns having the ramie yarn as a core yarn and the polyethylene terephthalate yarn as a sheath yarn (Example 2).

A circular knitted fabric having a basis weight of 370 g / m ² was knitted using long and short composite yarns each having the above-mentioned polyethylene terephthalate yarn as a core yarn and the above-mentioned ramie yarn as a sheath yarn (Comparative Example 6).

Separately, the above-mentioned ramie yarn was used as the core yarn, and the single fiber fineness was
Denier, total fineness 150 denier, number of filaments 15
Circular knitted fabric having a basis weight of 370 g / m ² was knitted using long and short composite yarns having a polyethylene terephthalate yarn as a sheath yarn (Comparative Example 7).

Table 2 shows the evaluation results of the characteristics of these knitted fabrics, wiping performance and the like.

[0045]

[Table 2]

[0046]

The present invention is to provide a wiping cloth which is excellent in wiping characteristics, excellent in water absorption, water retention, feel and feel, and has less fluff on the wiping surface. Further, it is extremely useful not only as a wiping cloth but also as a handkerchief wiping cloth, tumbler cloth, kitchen cloth, cleaning cloth, and the like.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of a long and short composite yarn constituting a wiping cloth of the present invention.

FIG. 2 is a side view schematically showing a rubbing treatment device for measuring an area ratio.

FIG. 3 is an enlarged side view schematically showing a rubbing state by the rubbing device.

[Description of Signs] 1: Specific monofilament fineness fiber yarn 2: Natural fiber yarn 3: Fabric sample 4: Sand film 5: Support roll

Claims (1)

(57) [Scope of request for utility model registration] 1. A natural fiber and a single fiber fineness of 0.001 to 0.5.
Made of denier synthetic fiber , with the above natural fiber as the core,
A composite yarn wound around the above synthetic fiber as a sheath
A wiping cloth composed of a woven or knitted fabric, wherein the content of natural fibers is 20 wt% or more;
At least one surface has an area ratio of 80
% Or more is covered with a synthetic fiber having a single fiber fineness of 0.001 to 0.5 denier.