JP2010259633A - Cleaning sheet and manufacturing method thereof - Google Patents

Abstract

To provide a cleaning sheet made of a non-woven fabric that satisfies both the feeling of use and the cleaning effect, is reasonable in cost, and is suitable for disposable use.
SOLUTION: 10 to 90% by weight of ultrafine fibers having a fineness of 0.01 to 0.7 dtex obtained by dividing an easily splittable composite fiber and 90 to 10% by weight of non-split fibers having a fineness of 1 to 7 dtex are mixed. The cleaning sheet which consists of a nonwoven fabric obtained by doing. As the easily split type composite fiber, a composite fiber composed of a polyester component and a polyamide component and having a cross-sectional shape in which both components are alternately bonded radially is preferable.
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Description

The present invention relates to a sheet for cleaning kitchens, toilets, furniture, indoor walls, floors, etc., using a nonwoven fabric containing ultrafine fibers (microfibers), and a method for producing the same.

2. Description of the Related Art Conventionally, as a nonwoven fabric sheet for cleaning, one containing ultrafine fibers divided into a fineness of 0.5 denier or less is known. For example, Patent Document 1 discloses a nonwoven fabric wiper composed of 20 to 90% by weight of fibers having a fineness of 10 denier or more and 10 to 80% by weight of ultrafine fibers divided by mechanically splittable fibers. Further, a wiper non-woven fabric containing ultrafine fibers or 100% ultrafine fibers (Patent Document 2), an automobile wiper composed of a fabric containing ultrafine fibers (Patent Document 3), and the like are also known.

However, if the amount of ultrafine fibers is too large, there are problems such as poor sliding during use, and depending on the type of ultrafine fibers, there is also a problem that it is difficult to obtain an appropriate nonwoven fabric. Accordingly, it has been desired to develop a nonwoven fabric that satisfies both the feeling of use and the cleaning effect, is reasonable in cost, and is suitable for disposable use.

Japanese Patent Laid-Open No. 6-14860 JP 2003-301359 A JP 2004-276948 A

An object of the present invention is to provide a cleaning sheet made of a non-woven fabric that satisfies both the feeling of use and the cleaning effect, is reasonable in cost, and is suitable for disposable use.

In order to solve the above problems, the present inventor examines in detail the type of ultrafine fiber, the thickness of the fiber, the thickness and the ratio of the normal fiber to be combined, and the like from the nonwoven fabric satisfying all the above conditions. This is the development of a cleaning sheet.

That is, the present invention provides 10 to 90% by weight of ultrafine fibers having a fineness of 0.01 to 0.7 dtex obtained by dividing an easily splittable composite fiber, and 90 to 10% by weight of non-split type fibers having a fineness of 1 to 7 dtex. It is the cleaning sheet which consists of a nonwoven fabric obtained by mixing.

Another aspect of the present invention is that 10 to 90% by weight of ultrafine fiber having a fineness of 0.01 to 0.7 dtex obtained by dividing an easily splittable composite fiber and a non-split type hygroscopic material having a fineness of 1 to 7 dtex. It is a wet type cleaning sheet in which a nonwoven fabric obtained by mixing 90 to 10% by weight of fibers is impregnated with water containing a disinfectant or a preservative.

Another aspect of the present invention is that 10 to 90% by weight of ultrafine fibers having a fineness of 0.01 to 0.7 dtex obtained by dividing an easily splittable composite fiber, and non-split polyester fibers having a fineness of 1 to 7 dtex. It is a dry type cleaning sheet in which a non-woven fabric obtained by mixing 90 to 10% by weight is impregnated with a dust collecting agent.

And the other aspect of this invention is a method of manufacturing the cleaning sheet which consists of a nonwoven fabric, Comprising: 10-90 weight of easily split-type composite fibers which are divided | segmented and produce | generate the ultrafine fiber of the fineness of 0.01-0.7 dtex % And 90 to 10% by weight of non-divided fibers having a fineness of 1 to 7 dtex, and a nonwoven fabric is produced by a spunlace method, a spunbond method or a needle punch method.

According to this invention, the cleaning sheet which consists of the nonwoven fabric obtained by mixing the ultra fine fiber (microfiber) obtained by dividing | segmenting an easily-divided type composite fiber and a non-partition type fiber is obtained. In the present invention, by using the cleaning function of the microfiber, a wet type cleaning sheet capable of removing dirt can be obtained without using a detergent component such as a surfactant. Even in the dry type, dirt such as dust can be entangled without using a dust collecting agent (such as liquid paraffin) due to the split fiber structure of the microfiber.

The nonwoven fabric in the present invention is 10 to 90% by weight of ultrafine fibers having a fineness of 0.01 to 0.7 dtex and 90 to 10% by weight of non-split fibers having a fineness of 1 to 7 dtex obtained by dividing the easily splittable composite fiber. Is obtained by mixing.

The easily split type composite fiber is a fiber that is easily split by mechanical impact and gives a fine fiber having a fineness of about 0.01 to 0.7 dtex by splitting. Examples of such easily splittable composite fibers include polyamide components and polyester components, polyamide components and polyolefin components, polyamide components and polyacrylonitrile-based polymer components, polyester components and polyolefin components, and the like. It is not limited to the easily split-type fibers, and may be easily split composite fibers made of three or more types of resin components. In the present invention, a combination of a polyamide component and a polyester component is preferred.

Each component in the easily splittable composite fiber may be arranged in any way, for example, a cross-section of a fiber in which both components are alternately bonded in a radial pattern (may be a hollow fiber) or a different component There are bimetallic fibers in which layers are alternately laminated, fibers having a cross-sectional shape in which one component is formed radially and another wedge-shaped component is disposed therebetween. Since the ultrafine fibers obtained from these easily split composite fibers have a sharp cross-sectional shape portion, they are more excellent in cleanliness such as an oil film than the ultrafine fibers having a substantially circular cross section.

In the present invention, the nonwoven fabric has a fineness of 0.01 to 0.7 dtex obtained by dividing an easily split composite fiber, preferably 0.05 to 0.2 dtex, and an ultrafine fiber of 10 to 90% by weight, preferably 40 to 40%. It is composed of 60% by weight and 90 to 10% by weight, preferably 60 to 40% by weight, of non-divided fibers having a fineness of 1 to 7 dtex, preferably 1 to 2 dtex. When the amount of the easily splittable composite fiber is less than 10% by weight, the cleanliness of the oil film or the like by the ultrafine fiber is lowered, and conversely, when it exceeds 90% by weight, the slip property of the fiber is deteriorated and the handling property is inferior. . Moreover, the bulkiness of a nonwoven fabric also becomes low and dust collection property worsens. If the amount of the non-split fiber is less than 10% by weight, or if it exceeds 90% by weight, the disadvantages opposite to those described above occur, which is inappropriate.

The non-divided fiber having a fineness of 1 to 7 dtex is not particularly limited, but regenerated fiber such as rayon, animal fiber such as silk and wool, semi-synthetic fiber such as acetate fiber, polyamide (nylon) fiber, vinylon Examples thereof include synthetic fibers such as fiber, acrylic fiber, polyester fiber, polyvinylidene chloride fiber, polyvinyl chloride fiber, polyurethane fiber, polyethylene fiber, and polypropylene fiber.

When a hygroscopic fiber is selected as the non-split fiber, a wet type cleaning sheet can be obtained by impregnating the obtained non-woven fabric with water containing a disinfectant or a preservative. Among hygroscopic fibers, rayon is particularly preferable. Moreover, you may add surfactant, a fragrance | flavor, alcohol, etc. to the water impregnated to a nonwoven fabric.

When the nonwoven fabric of the present invention is used as it is without impregnating anything, a dry type cleaning sheet can be obtained. In this case, it is preferable to use a polyester fiber as the non-split type fiber. The obtained non-woven fabric may be used as a dry type cleaning sheet as it is, but a non-woven fabric may be impregnated with a dust collecting agent such as liquid paraffin to form a dry type cleaning sheet.

The nonwoven fabric in the present invention is 10 to 90% by weight of ultrafine fibers having a fineness of 0.01 to 0.7 dtex and 90 to 10% by weight of non-split fibers having a fineness of 1 to 7 dtex obtained by dividing the easily splittable composite fiber. As long as it is a non-woven fabric obtained by mixing, the production method is not limited.

Easy-split composite fibers can be easily mechanically split, so they are mixed with non-split fibers with a fineness of 1 to 7 dtex, and split-opened by, for example, passing through a card machine by the card method. It can be woven and entangled with non-split fibers to form a fiber web. After that, by using a method such as a spunlace method, a needle punch method, a spunbond method, a spray method, or a thermal bond method using a heat-fusible fiber, the division is sufficient, and the entanglement or bonding between fibers is performed. It can be manufactured by making it sufficient. Since the ultrafine fibers are entangled with the thick non-dividing fibers, the resulting fiber web is excellent in rigidity and strength, and maintains the voids due to the thick non-dividing fibers.

In the present invention, a spunlace method, a spunbond method or a needle punch method is preferably used. The spunlace method is a method in which fibers are made into a web by a wet method, and a high-pressure columnar water stream is applied to the fibers to entangle the fibers three-dimensionally. In the spunbond method, long fibers are formed into a sheet shape and heat and pressure are applied to form a nonwoven fabric. Non-woven fabric by the spunbond method is suitable as a material for paper diapers because it does not stretch or shrink. The needle punching method is a method of forming a sheet by binding fibers with a barbed needle.

EXAMPLES Hereinafter, although an Example demonstrates this invention, this invention is not limited to a following example.

It has a fiber cross-section in which polyamide components are arranged radially between polyester components, and it is 50% by weight of 16-divided chrysanthemum-shaped chrysanthemum-type easily-divided fibers (fineness 2.2 dtex, fiber length 38 mm). After blending 1.65 dtex and 50% by weight of rayon having a fiber length of 51 mm, the fiber was opened by a card machine, and then entangled by a span rayon method to produce a nonwoven fabric. The obtained nonwoven fabric had a basis weight of 45 g / m ² , a thickness of 0.3 mm, and an apparent density of 0.15 g / cm ³ .

Since the nonwoven fabric thus obtained uses easily split fibers, the easily split fibers are sufficiently split in the process of opening with a card machine to form ultrafine fibers, and is excellent in cleanliness of oil and dirt. Yes. In addition, since the non-split fiber is a thick fiber, the obtained nonwoven fabric is bulky due to the voids, and exhibits excellent dust absorption. Therefore, the obtained nonwoven fabric can be cut into an appropriate size and used as it is as a dry type cleaning sheet.

The nonwoven fabric obtained in Example 1 was impregnated with 100 ml of water containing 0.5% commercially available disinfectant and 5% ethanol per 1 m ^{2 of} nonwoven fabric to obtain a wet type cleaning sheet having excellent cleanability. It was.

The basis weight, thickness, and apparent density were 45 g / m ² , 0.3 mm, and 0, respectively, in the same manner as in Example 1 except that 50% by weight of polyester fiber having a fineness of 2.2 dtex and a fiber length of 38 mm was used as the non-split type fiber. A nonwoven fabric of .15 g / cm ³ was obtained. The obtained non-woven fabric was cut into an appropriate size, and a dry type cleaning sheet excellent in cleanliness and dust absorption could be obtained as it was.

Claims (8)

It is obtained by mixing 10 to 90% by weight of ultrafine fiber having a fineness of 0.01 to 0.7 dtex obtained by dividing an easily splittable composite fiber and 90 to 10% by weight of non-split type fiber having a fineness of 1 to 7 dtex. A cleaning sheet made of non-woven fabric. The cleaning sheet according to claim 1, wherein the easily split type composite fiber comprises a polyester component and a polyamide component, and has a cross-sectional shape in which both components are alternately bonded radially. The cleaning sheet according to claim 1 or 2, wherein the non-split type fibers are hygroscopic fibers. The cleaning sheet according to claim 3, wherein the hygroscopic fiber is rayon. The cleaning sheet according to claim 1, wherein the non-dividing fiber is a polyester fiber. Mixing 10 to 90% by weight of ultrafine fiber having a fineness of 0.01 to 0.7 dtex obtained by splitting an easily splittable composite fiber and 90 to 10% by weight of non-split type hygroscopic fiber having a fineness of 1 to 7 dtex A wet type cleaning sheet obtained by impregnating a nonwoven fabric obtained by impregnation with water containing a disinfectant or a preservative. 10% to 90% by weight of ultrafine fiber having a fineness of 0.01 to 0.7 dtex obtained by dividing an easily splittable composite fiber and 90 to 10% by weight of non-split type polyester fiber having a fineness of 1 to 7 dtex are mixed. A dry-type cleaning sheet obtained by impregnating the obtained non-woven fabric with a dust collecting agent. A method for producing a cleaning sheet comprising a non-woven fabric, comprising 10 to 90% by weight of easily splittable composite fibers that are split to produce ultrafine fibers with a fineness of 0.01 to 0.7 dtex, and a non-split type with a fineness of 1 to 7 dtex A method for producing a cleaning sheet, comprising mixing 90 to 10% by weight of fibers and producing a nonwoven fabric by a spunlace method, a spunbond method or a needle punch method.