JPH09266873A - Thick wiping cloth - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thick nonwoven wiping cloth that is soft while showing washing resistance with which it does not become fuzzy and not ripped even when washed and excellent water absorption. SOLUTION: This cloth comprises a web composed chiefly of hydrophilic fibers three-dimensionally entwined by use of a needle punch or by a water-jet process and having a METSUKE (base weight) of 100 to 500g/m<2> , with a chemical binder bonded to each side of the web while being dispersed, so that the cloth is excellent in washability, softness, and water absorption. The amount by which the binder is imparted to each side is 3 to 25wt.% of the web weight, the total amount imparted being preferably 30wt.% or less.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thick wiping cloth which is widely used for household, commercial, industrial or hospital use, as a wipe, or as a wipe. More specifically, specifically as a dishcloth for disassembling, cooking, and repacking food, especially as a drip wipe for chicken and fish with a high water content, as a dishcloth for absorption, and as a padding material for loosening meat As such, it is suitable for working in a back room in a food processing plant or a supermarket. Further, in a cash register or a soccer table in a supermarket, it is suitable as a cloth that can be wiped with a finger or wetted with fingers even if it is left alone during business hours instead of a conventional counter cloth that has a small water retention amount and a drying speed that is too fast.

[0002]

2. Description of the Related Art Conventionally, hydrophilic fibers such as rayon and cotton are formed into a web by a card, and a vinyl acetate or acrylic chemical binder is applied to one side of the web by a print roller. A wiping cloth that is a non-woven fabric obtained by binding the above is well known.

There are various print patterns, such as a wipe pattern seen in a cloth and a counter cloth, a cross hatch shown in Japanese Patent Publication No. 32-10389, and a dot print seen in Japanese Patent Publication No. 32-4833.

In these patterns, a chemical binder is applied to one side of the web in a dispersed state by a print roller, and then the web is dried to be a non-woven fabric.
At this time, the chemical binder also penetrates into the surface opposite to the surface to which the chemical binder is applied, and contributes to improving the morphological stability of the nonwoven fabric, that is, the washing resistance. That is, in the case of a thin wiping cloth having a small basis weight, the one having good morphological stability can be obtained by the print bonding from one side without impairing the soft feeling of the nonwoven fabric.

However, for example, in a kitchen of a restaurant, in a food processing plant, or in a back room of a supermarket, not only for cooking food but also for disassembling food materials such as frozen food, repacking work, etc. In many cases, a thick wiping cloth having a large areal weight is required for its absorption.

In response to such demands for use, conventionally, it is conceivable to use a plurality of sheets having a small basis weight such as the above-mentioned wiping cloth, which are superposed on each other.
If they are simply piled up, they are not easy to use, and if they are washed with water to clean them, they need to be piled up again for reuse, which is the work flow of the operator. Stop, and it's hard to use.

In order to overcome this inconvenience,
It is conceivable that a plurality of the wiping cloths are sewn to be thick, but satisfactory sewing will increase the cost. In addition, such a stack of a plurality of sheets is a hotbed of various germs in which food dregs and the like enter through the gaps between the overlapping surfaces.

[0008] Therefore, rather than sew a plurality of the thin wiping cloths by overlapping,
From the beginning, a non-woven wiping cloth as a thick one piece is desired.

However, even if an attempt is made to add a chemical binder by the above-mentioned print bonding method, when the basis weight of the nonwoven fabric is 100 g / m ² or more, the binder does not penetrate to the surface opposite to the side where the binder is applied, and the obtained product is obtained. When the nonwoven fabric is washed, there are disadvantages that many fluffs are generated on the surface to which the binder is not applied and the nonwoven fabric is broken during the washing.

If a large amount of binder is applied from one side in order to prevent such a phenomenon, the softness and water absorption of the nonwoven fabric will be impaired.

[0011]

SUMMARY OF THE INVENTION Therefore, according to the present invention, a thick non-woven wiping cloth does not generate fluff even when washed, does not break, and has excellent wash resistance and softness while exhibiting excellent water absorption. It is intended to provide a wiping cloth having both the washing resistance and the softness.

[0012]

The present invention comprises a hydrophilic fiber as a main component, and a web obtained by a card or the like is three-dimensionally entangled with a fiber by needle punching or water treatment, and then the web is formed. obtained by applying a chemical binder to both surfaces, washing resistance, has a soft and excellent water absorption properties, a thick wiping cloth to a basis weight of 100 g / m ² no 500 g / m ^2.

The main fiber used in the present wiping cloth is preferably a hydrophilic fiber such as pulp, rayon, polynosic, cupra, duocell or cotton. In the present specification, the term "mainly hydrophilic fibers" means that it is assumed that the hydrophilic fibers are used to form the wiping cloth, and the hydrophilic fibers are the largest among the constituent fibers. Does not necessarily mean occupying the ratio of.

That is, in the present invention, it is essential to use hydrophilic fibers as the wiping cloth, but if the wiping cloth is thick, the drying speed after washing is slow and it becomes easy to become unsanitary. Against
It is also preferred to mix the hydrophobic fibers in an amount of 10 to 60% by weight of the web.

In this case, a large amount of the hydrophobic fiber is mixed in the middle layer of the non-woven web so as not to impair the absorbability of the non-woven web,
The surface layer of the web is preferably rich in hydrophilic fibers.

Examples of the hydrophobic fiber include various fibers such as nylon, polyester, polyethylene, polypropylene, vinylon and acrylic.

The above-mentioned hydrophilic fiber or hydrophobic fiber used in the present wiping cloth may be a modified cross-section fiber other than a round cross-section, or may be an antibacterial fiber containing or coating an antibacterial agent, Furthermore, it may be a deodorant fiber containing or coated with a deodorant.

The most common method of obtaining the nonwoven web of the present wiping cloth is by card.

Various types of webs can be used, such as a parallel web, a random web, a cross web, and a web in which these are laminated. Melt blown non-woven fabric, spun bond non-woven fabric, pulp non-woven fabric and the like are also taken up as a kind of web.

In the present invention, these webs are needle punched or 30 kg / m ² to 300 kg / m ^2.
And the fibers in the web are three-dimensionally entangled. Compared with the former needle punch treatment, the latter water stream treatment is more advantageous in that a higher fiber entanglement can be obtained and the amount of the chemical pinder added can be small, and as a result, a wiping cloth that exhibits more water absorption performance can be obtained. And more preferably. However, the present invention does not exclude needle punched nonwoven webs.

The three-dimensionally entangled web is first
As a step, a chemical binder is applied to the one surface by a print roller. The web with the binder applied on one side is dried and cured. Next, as the second step, the binder is applied to the other surface to which the binder has not been applied in the first step, as in the first step, and dried and cured. Of course, it is possible to adopt a method in which a chemical roller is applied to both sides of the web by a print roller at the same time.

In the wiping cloth of the present invention, the chemical binder is provided on both sides of the nonwoven fabric in a dot shape, a polka dot pattern having an enlarged area, a stripe shape, or a modified Wapi shape. It is essential that the region and the region that have not been imparted are mixed so that they are in a dispersed state so that they are imparted to the entire surface of the non-woven fabric. You can't get a wiping cloth.

As the binder used in the present invention, various binders such as vinyl acetate type, acrylic type, rubber type and vinyl chloride type are used, but acrylic type is most preferable from the viewpoint of washing resistance and softness. These binders include
For example, various additives such as a surfactant which imparts hydrophilicity or enhances a crosslinking function can be contained.

The binder applied to one side is 3 to 25% by weight based on the weight of the web. If the amount is less than 3% by weight, effective binding between the single fibers on the entire surface of the web cannot be obtained and the washing resistance cannot be secured. On the contrary, if the amount exceeds 25% by weight, the softness and water absorption of the web are impaired. This is inconvenient.

The print pattern of the binder and the amount of the binder applied to both sides of the web may be the same or different. However, the total amount of the binder applied to both surfaces is preferably 30% by weight or less of the final web weight. If the total amount exceeds 30% by weight,
This is because the non-woven web has poor softness and water absorbency.

The basis weight of this wiping cloth is
It is 100 g / m ² or more and 500 g / m ² or less. 100
When it is less than g / m ² , good products can be obtained by the conventional method. If the basis weight exceeds 500 g / m ² , a sufficiently satisfactory product cannot be obtained even by the means of the present invention.

[0027]

【Example】

Example 1; This example is an example of a wiping cloth obtained by laminating and treating webs having three layers. That is, three cards arranged in series are used to form both sides of the web.
For the second and third cards, 100% rayon staple having a single fiber fineness of 2.0 denier and a cut length of 5 lmm was supplied. The second card in the middle, which is the middle layer of the web, has a single fiber fineness of 2.0 denier and 50% by weight of rayon staple having a cut length of 5 lmm, and the same single fiber fineness of 2.
50 denier polyester fiber with a cut length of 5 lmm
A blended cotton consisting of 10% by weight was supplied.

40 g / m 2 for each of the 3 cards
The parallel web of No. ² was continuously taken out at a speed of 50 m / min, and three webs were laminated on the conveyor belt. That is, a 100% rayon upper and lower web sandwiched with a polyester-mixed web 120 g
A web of / m ² was obtained.

The web thus obtained was subjected to a water-wetting treatment as a pre-treatment for the water-flow treatment, and then 30 and 30, respectively.
The fibers in the web were three-dimensionally entangled by treatment with a four-step water flow having a water pressure of 40, 60 and 80 Kg / m ² .

On one side of the obtained web, as a first step, an acrylic binder emulsion to which a pink pigment was added was applied by a print roller to form a dot pattern so that the attached amount was 10% by weight of the weight of the web. And subjected to drying and heat treatment with a cylinder dryer at 140 ° C. As the second step, the same binder as used in the first step was applied to the other surface to which the binder was not applied in the first step so that the weight was 7% by weight based on the original web weight. Then, similarly, drying and heat treatment were performed by a cylinder dryer at 140 ° C.

The non-woven fabric thus obtained has a basis weight of 140 g /
It had m ² and was excellent in washing resistance, softness and water absorption in the following measurement evaluation, and was suitable for a wiping cloth.

For the evaluation of washing resistance, a fully automatic washing machine (AW-42S7 type) manufactured by Toshiba Corp. was used and the washing operation for 40 minutes was repeated 10 times with water at room temperature. The wiping cloth of this example obtained by this washing operation had no fluffing and had a good appearance.

The softness is evaluated by five people with the feeling of being held in the hand, but the wiping cloth of this example is as excellent as the conventional non-woven wiping cloth having a basis weight of less than 100 g / m ^2. Everyone evaluated it.

The water absorption is measured according to JIS L1O96, 6.2.
The suction length was measured by the 6.18 method (Bayrec method). As a result of this measuring method for the wiping cloth of this example, the suction length after 10 minutes reached 103 mm, and showed water absorption equivalent to that of the cotton wipe.

COMPARATIVE EXAMPLE 1 The web obtained in Example 1 by the water stream treatment is the one in which the binder is applied only to one side of the web. That is, the same binder as that used in Example 1 was applied from one side by the same dot pattern printing as in Example 1, dried by a cylinder dryer, and heat-treated.

The non-woven fabric thus obtained has a basis weight of 124 g.
/ M ² and the same performance evaluation as in Example 1 was performed, the water absorption was similar to that of the wiping cloth in Example 1, but fluff occurred on the unprinted surface in the washing resistance test. However, the product did not satisfy the performance as a wiping cloth.

[0037]

As described above, the thick non-woven wiping cloth having a basis weight of 100 g / m ² to 500 g / m ² according to the present invention has excellent water absorption and softness, and also has washing resistance. It can be widely used as a cleaning cloth, a cleaning cloth, which is easy to use, has washing durability, and is inexpensive for household, commercial, industrial, or hospital use.

Claims (3)

[Claims] 1. A basis weight of three-dimensionally entangled by a needle punch or water treatment is 100 g / m ² to 500.
A thick wiping cloth with excellent washability, softness and water absorbency, in which a chemical binder is provided in a dispersed state and adhered and fixed to both sides of a web mainly composed of g / m ² hydrophilic fibers. 2. The amount of the chemical binder applied to each side is 3 to 25% by weight based on the weight of the web,
The thick wiping cloth according to claim 1, wherein the total application amount is 30% by weight or less. 3. The web according to claim 1, wherein the web contains 10 to 60% by weight of the total weight of the hydrophobic fiber, and the hydrophobic fiber is present in a greater amount in the thickness direction of the web on the central layer side than on the surface layer side. Thick wiping cloth described.