JP2002325717A - Nonwoven fabric for cleaning - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a nonwoven fabric for cleaning which is capable of lessening the pickup of oil contamination onto hands and decreasing the frequencies of using detergents. SOLUTION: This nonwoven fabric for cleaning contains >=40% acrylic fibers of a conjugate structure of bimetals having single yarn fineness from 2.3 to 23 dtex.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an excellent washing nonwoven fabric for washing dishes.

[0002]

2. Description of the Related Art Various structures have been devised for cleaning structures. For example, there is a glove-like one in which handling is emphasized, and a grit-like one in which polishing powder is included for the purpose of improving the cleaning property (Japanese Patent Laid-Open No. 2000-325280). In the case of commercially available products, urethane sponge and Saran resin are often attached.

On the other hand, recently, various things have been devised in order to reduce the use of detergents due to concerns about environmental issues. Under these circumstances, it has been recognized that acrylic fibers exhibit a good wiping effect on tea astringency and oil stains (Japanese Utility Model Registration No. 3008736, JP-A-9-285436, JP-A-11-217758) ). Disclosed here,
Practical use of non-woven fabric aimed at improving wipeability,
Certainly showed good wiping properties. However, when used for washing dishes and trying to remove oil stains, the oil stains on the dishes could be easily removed, but there was much oil transfer,
The problem was that the oil was sticky on the hands. For this reason, it was found that there was a problem that the hand was once again washed with a detergent and the next tableware was washed, and the effect of substantially reducing the amount of detergent used was poor.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a cleaning structure capable of reducing the transfer of oil stains and using less detergent.

[0005]

SUMMARY OF THE INVENTION The present invention provides a nonwoven fabric for cleaning, comprising a bimetallic conjugate structure containing at least 40% by weight of acrylic fiber having a single fiber fineness of 2.3 dtex to 23 dtex.

Hereinafter, the nonwoven fabric of the present invention will be described in detail.
The functions required for washing cloths used for dishwashing, etc. are:
Good compatibility with water, good compatibility with oil, large surface area, moderate frictional force on the surface, etc.
Many findings for removing stains on tableware are known. However, in practical use, it is important for the environment and cost to be able to wash many dishes in succession and to use or reduce the use of detergents. By providing a cleaning structure with a small amount of detergent, the amount of detergent used can be reduced.

As a result of the inventor's intensive research to make such a thing possible, the characteristics of the cleaning structure are as follows.
In the state of being wet with water, the oil dirt spreads well, the oil droplets are subdivided, and the oil droplets are easily dispersed (re-released) into water by the fir effect in water. A cleaning structure having a special structure, which has a delicate balance of dispersed release, has been found. That is, in the present invention, the single yarn fineness is 2.3.
The present invention has been successfully achieved by a nonwoven fabric for cleaning containing 40% by weight or more of acrylic fibers having a bimetallic conjugate structure in the range of dtex to 23dtex.

The acrylic conjugate fiber of the present invention may be a general polymer containing acrylonitrile as a main component. Examples of the second comonomer include acrylic acid, methacrylic acid, methyl acrylate, vinyl acetate acrylamide, methacrylamide, vinyl chloride, and vinylidene chloride. As the third comonomer, sodium allyl sulfonate, sodium methallyl sulfonate 2-acrylamide 2-methylpropane sodium sulfonate, and the like can be used. From the viewpoint of increasing the affinity for a wider range of dirt, two types used for forming the bimetal structure or
It is recommended that higher polymers use more than 5% by weight of the second comonomer and that each of these components be different. For example, when a polymer having methyl acrylate or vinyl acetate as the second comonomer is used as the first polymer, it is recommended to use a polymer having acrylamide or methacrylamide as the second comonomer as the second polymer. Briefly, the second copolymerized into two polymers
It is preferable that the ionicity of the functional group of the comonomer be cationic, anionic, or nonionic and be different from each other.

To produce fibers from the above polymers, these polymers are dissolved in a solvent such as dimethylformamide, dimethylacetamide, dimethylsulfoxide, a concentrated aqueous solution of nitric acid, a concentrated aqueous solution of rodane salt, a concentrated aqueous solution of zinc chloride, and wet-processed. It can be produced by a known method such as spinning or dry spinning. It is important that the acrylic conjugate fiber is composed of two or more polymers having different copolymerization components. The same component has poor sponge effect and cleaning effect. Also, a side-by-side structure is recommended over a seascore structure. Side-by-side may be two layers or multiple layers.

Although the details of the action and effect are unknown, the acrylic fiber having a bimetal structure is composed of polymers having different surface active states and ionic properties, so that it can be used in a wide range of surface active areas from water to oil. , Has the function of disturbing the surface activity, and by that action, the cleaning effect, the spreading effect of the oil, and the effect of re-release of the oil are exhibited, and the effect that the transfer of the oil is small is exhibited. I guess. In addition, the bimetallic conjugated acrylic fiber has a unique sponge structure that is bulky and has a unique sponge structure. It is presumed that it is promoting.

Various shapes are possible as long as the acrylic fiber has a bimetallic conjugate structure, but in order to obtain a constant sponge effect, the single-fiber fineness is 2.3 dt.
ex must be greater than or equal to ex. Single yarn fineness is 2.3d
If it is less than tex, it is difficult to obtain a sponge effect when used in water, and it is difficult to use repeatedly. The shape of the single fiber is preferably a round cross-section from the viewpoint that elasticity is easily obtained.
On the other hand, if the single-fiber fineness exceeds 23 dtex, the eyes of the nonwoven fabric become too coarse and the washing effect is reduced, which is not preferable. The surface shape of the fiber is preferably such that a micro line is preferably provided on the surface of the fiber in that the effect of easily removing dirt is easily obtained. In order to further enhance the sponge effect, it is recommended to use a material that exhibits a coiled crimp shape by heat treatment. Furthermore, in order to appropriately exhibit both hydrophilicity and hydrophobicity, the oil agent used at the time of raw cotton production and the oil agent used as a finishing agent such as dyeing use both anion-nonionic-weak cation oil agents. It is recommended that Strongly water-repellent oils are not preferred.

It is important that the bimetallic conjugate fiber of the present invention contains at least 40 wt% or more. When the content is less than 40 wt%, the bimetallic acrylic fiber exists on the surface and inside. The probability is reduced, the effect of promoting washing and removal of dirt is reduced, and a nonwoven fabric for cleaning that can be repeatedly used for oily dirt cannot be obtained. More preferably, the content of the acrylic fiber having a bimetal conjugate structure is 60 wt% or more. The thickness of the cleaning nonwoven fabric is preferably 2 mm or more. When the thickness is less than 2 mm, the spread of oil stains is reduced, the sponge effect is weak, and it is difficult to sufficiently disperse and re-release the oil droplets in water, and it is difficult to obtain the target effect.

Various fibers can be used as the material to be composited, and heat-fusible fibers (polyester, nylon, polypropylene) having a binder effect are used in combination to increase the strength and durability of the structure. It is preferable to use 10 wt% to 40 wt%. If the content is less than 10 wt%, the binder effect is small, and if it exceeds 40 wt%, the cleaning property is reduced.

As a material other than these, it is preferable to use an acrylic fiber. The acrylic fibers used here can be of various sizes and shapes.
For example, by using fibrillated microfiber together, finer dirt can be removed, or
A sponge with a feeling of holding can also be made by using other acrylic fibers with a large fineness. Such a cloth can be used alone as a washing cloth for dishwashing or the like, but may be used in a state of being bonded to a general sponge or another structure. In any case, it is important that the bimetallic conjugate structure acrylic fiber of the present invention contains 40 wt% or more. The nonwoven fabric of the present invention may be subjected to unevenness by design shearing, embossing, or the like, or may be dyed or printed to enhance the design. The method of dyeing and using acrylic is more preferable from the viewpoint of cost and fastness. In addition, acrylic fiber used here and other fibers, antibacterial,
In the case where a fiber having bacteriostatic properties is used in combination and a detergent is not used, it is also possible to suppress the generation of odors and germs when left in a kitchen and dried.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described more specifically with reference to embodiments of the present invention. The evaluation method of Examples and Comparative Examples is based on the following method. 1) Evaluation method Five monitors were used to wash salad oil on five dishes in succession without using a detergent, and the washability, the oil transferability, and the repeated use were evaluated.

(Washability) ○ Washed dishes are clean △ Washed dishes are clean but sticky × Washed dishes are not washed as sticky (oil transferability) ○ Oil is washed in hands Not transferred △ Oil slightly washed after washing × Oil transferred to hand and felt uncomfortable (repeated washing) ○ Good cleaning performance even with the 5th sheet. Δ: The fifth sheet showed a slight decrease in washability. × At the fifth sheet, the cleaning property is completely poor. (Thickness) Measured with a thickness measuring instrument

[0017]

Examples 1-5, Comparative Examples 1-3 Predetermined fineness (dte
x) normal acrylic fiber (manufactured by Kashimilon Asahi Kasei Corporation (acrylonitrile 91 wt%, methyl acrylate 8 wt%,
Conjugate acrylic fiber of a bimetallic structure with a predetermined fineness (first polymer: acrylonitrile 91 wt%, methyl acrylate 8 wt%, other 1 wt%)
% Or less, second polymer: acrylonitrile 87 wt%,
Methyl acrylate 4 wt%, acrylamide 8 wt%,
(1 wt% or less) was dissolved in nitric acid, and manufactured by a conventional method using a nozzle having a bimetal structure, and a cut fiber of 51 mm was prepared using the obtained bimetallic acrylic fiber. These are mixed at a predetermined mixing ratio shown in Table 1,
Hot-melt polyethylene terephthalate (PET) fiber (Melte 4d; manufactured by Unitika Ltd.) cut length 51 mm, and ordinary PET fiber (single yarn fineness 3.3 dtex, cut length 51 m)
m), mixed with a card machine, made into a nonwoven fabric with a knee pan, and heat-set to obtain a nonwoven fabric having a predetermined thickness and a predetermined basis weight. Table 1 shows the basis weight, thickness, detergency, oil transferability, reusability, and wet spreadability.
It was shown to. As shown in Table 1, in a nonwoven fabric for cleaning containing 40% or more of an acrylic fiber having a bimetallic conjugate structure having a single-fiber fineness of 2.3 dtex to 23 dtex, the cleaning property of oil, the transfer property of oil, the reusability, In addition, good results were obtained with respect to the WET spreadability.

[0018]

[Table 1]

[0019]

According to the present invention, the single yarn fineness is 2.3 dte.
In a cleaning nonwoven fabric containing 40% or more of an acrylic fiber having a bimetallic conjugate structure of x to 23 dtex, oil cleaning properties, oil transferability, repetitive useability,
In addition, it is possible to provide a nonwoven fabric for cleaning which has good wettability and spreadability of oil at the time of WET, reduces transfer of oil stains, and can use less detergent.

Claims (1)

[Claims] 1. A non-woven fabric for cleaning comprising 40 wt% or more of acrylic fiber having a bifilament conjugate structure having a single fiber fineness of 2.3 dtex to 23 dtex.