JP2005204965A - Cloth for washing bag and washing bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a washing bag, obtaining enough washing effect and preventing damage of clothes while having a simple sewn structure. <P>SOLUTION: Cloth for this washing bag has the bending resistance of 100 to 170 mm in total of warp and weft by 45°cantilever method of JIS L 1096 in wetting, and a dynamic frictional coefficient of 0.75 or less to wet cotton according to JIS K 7152. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a laundry bag fabric.

  When washing clothes and the like with a washing machine, a washing bag or a washing net is often used to prevent the clothes from being damaged or deformed.

  Many of the commercially available products have nets in a bag shape, but although the clothes can be prevented from being damaged, the laundry tends to be biased to one side of the bag and a sufficient washing effect cannot be obtained.

  In order to prevent the laundry from being biased to one side in the laundry bag or the laundry net, for example, there is disclosed one in which the interior of the bag net can be finely divided (see Patent Document 1). Moreover, in order to prevent damage to clothes etc., what constituted the bottom part of the washing net with the cloth with a large impact-relieving absorption power is disclosed (refer patent document 2). However, these have a problem that the structure is complicated and the cost is high.

Moreover, although the laundry bag which consists of a nonwoven fabric is also disclosed (refer patent document 3), the said technique is a special thing using the fiber modified in order to remove the ion in tap water, and to raise the effect of a detergent, It was expensive and not practical.
Japanese Utility Model Publication No. 06-021590 Japanese Patent Laid-Open No. 62-186896 JP 2001-204988 A

  It is an object of the present invention to provide a laundry bag that has a simple sewing structure, can obtain a sufficient washing effect, and can prevent damage to clothing.

  That is, according to the present invention, the sum of warp and softness according to the 45 ° cantilever method of JIS L 1096 when wet is 100 to 170 mm, and the dynamic friction coefficient with respect to cotton fabric when wet is 0.75 or less according to JIS K 7152. There is a cloth for a laundry bag.

  Moreover, this invention is a laundry bag using the fabric for laundry bags of this invention.

  According to the present invention, in the laundry, since the laundry does not shift in the bag and the substantial laundry processing area can be taken, the laundry can be efficiently washed, and therefore, the laundry can be sufficiently washed while preventing the laundry from being damaged. Can be obtained.

  It is important that the fabric for a laundry bag of the present invention has a sum of bending and bending in a JIS L 1096 45 ° cantilever method of 100 to 170 mm when wet.

  The bending resistance by the 45 ° cantilever method when wet means that the fabric is less likely to bend as the value is larger. By sewing a laundry bag with a cloth having a numerical value of 100 mm or more, preferably 110 mm or more, even in a washing tub at the time of washing, a flat shape or a box shape can be maintained and an intended sewing form can be maintained. Can be prevented from being biased toward the bottom of the bag, and a substantial laundry processing area can be taken. On the other hand, when the numerical value exceeds 170 mm, the bag-like object is bent and becomes a buckled wrinkle, and the portion tends to be broken repeatedly by bending, and the laundry is easily damaged at the corner.

  In the present invention, “when wet” is defined by “measuring method” in Examples described later.

  In the present invention, the “vertical” and “horizontal” directions are defined as follows.

  In the case of a woven fabric, the longitudinal direction of the warp is the vertical direction, and the longitudinal direction of the weft is the horizontal direction. Even if the warp and weft cannot be discriminated after cutting or sewing, there is no particular problem because the sum in both directions is taken.

  In the case of a knitted fabric, the wale direction of the knitted fabric is the vertical direction and the course direction is the horizontal direction.

  In the case of the nonwoven fabric, the web forming direction is the vertical direction, and the web width direction is the horizontal direction. The web forming direction can be estimated from the fiber distribution and orientation direction, the direction of the embossed pattern, the streaks of the needle punch, and the like. If estimation by these methods is contradictory or it is impossible or difficult to estimate the direction of web formation because there is no clear orientation, pattern, trace, etc., the direction where the strength is maximum is the vertical direction and orthogonal to it. The direction is the horizontal direction. Here, when the strength does not depend on the direction, the direction in which the bending resistance is maximized is the vertical direction, and the direction orthogonal to the direction is the horizontal direction. Furthermore, when the bending resistance does not depend on the direction, an arbitrary direction can be set as a vertical direction, and a direction orthogonal to the vertical direction can be set as a horizontal direction.

  Examples of a method for adjusting the bending resistance of the fabric include a method in which a resin is attached to the fabric and the amount of the resin is adjusted, and a method in which the fabric weight is adjusted.

  Further, the laundry bag fabric of the present invention needs to have a coefficient of dynamic friction with respect to the cotton fabric when wet according to JIS K 7125 of 0.75 or less, and preferably 0.7 or less. By setting the coefficient of dynamic friction to 0.75 or less, the laundry cloth and the laundry are less likely to adhere to each other, and the washing liquid constantly enters and leaves the gap, thereby improving the washing effect.

  Moreover, it is preferable that the cloth for laundry bags of this invention is hydrophobic. Hydrophobic means that the fabric is difficult to wet with water, that is, the fabric repels water when it is dry. As a guideline, the water repellency rating of JIS L 1092 is 70 or more. It is preferable. Since the cloth is hydrophobic, the laundry wet with water and the cloth are less likely to be in close contact with each other. As a result, the washing liquid between the two tends to flow and constantly enters and exits, so that the washing effect is further improved.

  As a method of making the fabric hydrophobic, there is a special means of covering the surface with dense and fine hair so that the polka dots roll on the lotus leaf, but as the material itself constituting the fabric, It is preferable to employ a hydrophobic one. As such a material, for example, olefins such as polyethylene and polypropylene can be preferably used. Further, in the case of polyesters such as polyethylene terephthalate and polybutylene terephthalate, polyamide, etc., which are not as hydrophobic as polyolefins, they may be imparted with a fluorine or silicone resin by impregnation or the like.

  Further, as a material constituting the fabric for a laundry bag of the present invention, a material whose hardness does not change so much at the time of washing, that is, when wet is preferable, and also in this respect, polyethylene that is hydrophobic and has a relatively small change in hardness due to wetness, Olefins such as polypropylene are preferred.

  The fabric structure of the laundry bag fabric of the present invention can be appropriately selected from a woven or knitted fabric or a nonwoven fabric from the viewpoint of having a strength that can withstand mechanical treatment due to washing, and a long fiber nonwoven fabric is particularly preferable. .

  As described above, as a preferable method for adjusting the bending resistance of the fabric, there is an adjustment of the fabric weight. However, a long fiber nonwoven fabric can obtain a high hardness even with a relatively low fabric weight. Further, the long fiber nonwoven fabric formed from continuous fibers also has an advantage that fiber waste does not fall off during washing and a cost advantage. In addition, as described later, it is preferable to make a cut or a hole in the laundry fabric of the present invention, but in this case, a nonwoven fabric is also preferable because fraying and tearing are less likely to occur compared to a woven fabric or a knitted fabric. .

  As a method for producing such a long fiber nonwoven fabric, a spunbond method, a melt blow method, or the like can be preferably employed. In these production methods, stretched yarn or a polymer melted from a spinneret while being melted into a fiber is opened, collected as a group of long fibers on a net, and the fibers are bonded together by hot embossing. In this method, a predetermined sheet is obtained. Here, the hardness of the fabric can be easily changed by changing the temperature of the hot embossing or the nip pressure.

  Moreover, as a structure of this long fiber nonwoven fabric, it is preferable that the spunbond nonwoven fabric is laminated on both surfaces of the melt blown nonwoven fabric. Spunbond nonwoven fabrics generally have a single fiber diameter of about 10 to 50 μm and are strong, but the fabric weight tends to be inferior. On the other hand, melt blown nonwoven fabrics have a single fiber diameter of 1 to 10 μm and the strength tends to be weak. Then, because it is good, it is because the characteristic of both can be utilized by laminating each. As for the arrangement of each non-woven fabric in the lamination, melt blown non-woven fabric has a fiber in an unstretched state and can easily be subjected to heat emboss bonding, and can serve as an adhesive layer. From the viewpoint of preventing the fibers from tearing off and falling off with a specific force, a configuration in which a spunbond nonwoven fabric is laminated on both sides of the meltblown nonwoven fabric is more preferable.

  The single fiber fineness of the fibers constituting the nonwoven fabric is preferably 6 dtex or less. When the single fiber fineness of the constituent fibers is small, unevenness is small at the same basis weight, so that the basis weight variation in the nonwoven fabric can be suppressed by setting it to 6 dtex or less.

In the case of a long-fiber nonwoven fabric or a laminated fabric for a laundry bag, the basis weight of the laminate is preferably 200 g / m ² or less. By setting it to 200 g / m ² or less, the nonwoven fabric does not become heavy when formed into a bag shape, and the handleability in a state where wet laundry is put is also good.

  It is preferable to make a cut or a hole in the laundry bag fabric of the present invention or a laundry bag using the same because the washing liquid enters and exits the bag and washing is sufficient. The size, shape, spacing, and arrangement direction (vertical direction, horizontal direction, etc.) of the cuts or holes should be appropriately designed taking into account the strength that can withstand mechanical processing during washing so as to be compatible with the washing effect. .

  EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples.

(Measuring method)
(1) Bending softness when wet 2 g of detergent and 2 g of water in 3 L of 25 ° C. are dissolved to make a washing solution. Put the washing solution in a flat vat, let the fabric soak for 30 minutes or more, and wash in the fabric. After the liquid had permeated, that is, after confirming that the fabric had no dry whiteness and was wet, the detergent was washed away with running water for at least 30 minutes until no bubbles were generated by the detergent.
Next, the fabric was taken out of the water and placed on the filter paper, and the filter paper was placed on the fabric to remove excess moisture from the fabric. This state is referred to as “when wet”.

  The bending resistance when wet is determined according to JIS L 1096 (1999) “General Textile Test Method” 8.19.1 “45 ° Cantilever Method”. Measurements were taken on the front and back, the average value was calculated, and the sum of vertical and horizontal was calculated.

  As a detergent, Kao's synthetic detergent “Attack” was used, but when the detergent was not available, linear alkylbenzene sodium sulfonate, polyoxyethylene alkyl ether, sodium alkyl sulfate, sodium fatty acid It is considered that an equivalent result can be obtained if any one of them is a synthetic detergent mainly composed of either.

(2) Coefficient of dynamic friction with respect to cotton fabric when wet After the above "wet state", the dynamic coefficient of friction was measured according to JIS K 7125 (1999) "Plastic-film and sheet-friction coefficient test method". In addition, the cotton cloth of object cloth used the single fiber cloth (I) No. 3 (Kanakin No. 3) of JISL0803 (1998), and made it wet like a cloth.

(3) Water repellency Measured according to the evaluation of JIS L 1092 (1998) “Waterproof test method for textile products” 6.2 “Water repellency test”.

(4) Washing strength Using a 2-tank washing machine [Ginga 2.2; VH-220S3 (WO)] manufactured by Toshiba Corporation, 30 g of water and 20 g of Kao's synthetic detergent “Attack” in the washing tub And the laundry bag fabric was washed for 10 minutes at the setting of washing strength.
The damage state of the laundry bag after five washing treatments was visually evaluated according to the following criteria.
○: No change.
Δ: Signs of fuzz are seen on the surface of the laundry bag.
X: Destruction of some structures such as fluffing and tearing is observed throughout the washing bag.

(5) Washing effect / protection performance of laundry As a laundry, mud is attached to a 100% cotton T-shirt, and after standing for 1 hour, this is put in a laundry bag according to each of the examples and comparative examples, and the above (4 ) And the same laundry treatment. At that time, as a comparative laundry, a 100% cotton T-shirt not adhering mud was put in a laundry bag according to each of the examples and comparative examples, and was simultaneously subjected to a washing treatment in the same washing tub.
The laundry after washing and drying was visually compared with the laundry for comparison and evaluated according to the following criteria.
○: Good stain removal.
Δ: Dirt still remains.
X: Dirt removal is bad.
In addition to the washing effect, the damaged state of the T-shirt was visually determined according to the following criteria and evaluated as the laundry protection performance.
○: No change.
Δ: Signs of fuzz are observed on the surface.
X: Destruction of some structures such as fluffing and tearing is observed.

(Example 1)
Laminate spunbond nonwoven fabric with a basis weight of 25 g / m ^{2 made} of polypropylene is laminated on both sides of a melt blown nonwoven fabric with a basis weight of 10 g / m ^{2 made} of polypropylene, and heat-bonded with embossing to make the laundry bag of the present invention As a fabric, a laminate of long-fiber nonwoven fabric having a basis weight of 60 g / m ² was obtained.

  The sum of warp and softness when wet was 118 mm, the coefficient of dynamic friction with respect to cotton when wet was 0.63, and the water repellency was 90 points.

  This was sewed into a rectangular bag of 35 cm in length and 30 cm in width, and a hole with a diameter of 8 mm was provided in a lattice pattern every 5 cm in length and width to obtain the laundry bag of the present invention. It was excellent as a washing bag with excellent washability, no damage to the laundry.

(Example 2)
By impregnating an aqueous emulsion of a silicone-based resin into a 50 g / m ² long fiber nonwoven fabric made of polyethylene terephthalate, 5% by weight of a silicone-based resin is imparted to impart hydrophobicity to the laundry bag of the present invention. A fabric was obtained.

  The sum of warp and softness when wet was 159 mm, the coefficient of dynamic friction with respect to cotton when wet was 0.73, and the water repellency was 90 points.

  The said cloth was made into the washing bag of this invention like Example 1. A sufficient washing effect was exhibited in the same manner as in Example 1.

(Comparative Example 1)
A spunbond nonwoven fabric with a basis weight of 9 g / m ^{2 made} of polypropylene is laminated on both sides of a melt blown nonwoven fabric with a basis weight of 2 g / m ^{2 made} of polypropylene, and heat-bonded with emboss to give a basis weight of 20 g / m ^2. A laminate of long fiber nonwoven fabric was obtained.

  The sum of warp and softness when wet was 70 mm, the coefficient of dynamic friction with respect to cotton when wet was 0.63, and the water repellency was 90 points.

  The fabric was made into a laundry bag in the same manner as in Example 1. Since the fabric weight was low, it was soft as a washing bag, and the washing effect was not as good as in Examples 1 and 2.

(Comparative Example 2)
The laminate of the long-fiber nonwoven fabric similar to that obtained in Example 1 was further pressed at a linear pressure of 1372 N / cm with a plain thermal calendar roll (upper) and paper roll (lower) at a temperature of 140 ° C.

  The vertical and horizontal sum of the softness and softness of the cloth is as hard as 175 mm, and the coefficient of dynamic friction against the cotton cloth when wet is a high value of 1.0 because the sheet is smooth and in close contact with the cotton cloth. Was 90 points.

  The fabric was made into a laundry bag in the same manner as in Example 1. The washing effect was not as good as in the examples, and because the bag was hard in terms of resistance to washing, the wrinkled part was buckled and damaged due to repeated bending, and a little fluffing was also seen in the laundry .

(Comparative Example 3)
The laundry was evaluated using a commercially available laundry net bag made by Nihon Ryutsu Sangyo Co., Ltd., and the laundry was not damaged. The washing effect to do was insufficient.

(Comparative Example 4)
Instead of using the laundry bag, the laundry was put into the washing tub as it was for washing treatment. Although there was a washing effect, fuzz was seen on a part of the sleeve of the laundry.

Claims (5)

JIS L 1096 is characterized by the fact that the sum of bending and warping according to 45 ° cantilever method of JIS L 1096 is 100 to 170 mm, and the coefficient of dynamic friction with respect to cotton fabric when wet according to JIS K 7152 is 0.75 or less. A laundry bag fabric. The cloth for a laundry bag according to claim 1, wherein the cloth is hydrophobic. The cloth for a laundry bag according to claim 1 or 2, wherein the cloth is a long-fiber nonwoven fabric. 4. The laundry bag fabric according to claim 3, wherein the long fiber nonwoven fabric is obtained by laminating a spunbond nonwoven fabric on both sides of a melt blown nonwoven fabric. A laundry bag using the fabric for a laundry bag according to any one of claims 1 to 4.