JP2002253459A - Sheet for dry wiping and production method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet for dry wiping with improved ability for adsorbing and holding dirt such as fine dust or the like, for catching large dirt such as bread crumbs utilizing the ruggedness of nonwoven fabric and for catching large dust, lint or hair utilizing the entangling effect of nonwoven fibers having a high degree of freedom, hardly leaving fiber dust or hardly broken in wiping and giving little sticky feeling on hands, and to provide a production method therefor. SOLUTION: On one side or both the sides of a net-like sheet, a fiber assemblies like nonwoven fabric formed by entangling the fibers of fiber webs is integrated while being entangled even to the net-like sheet together with entangling among constitutive fibers thereof and in the fiber assemblies, the fibers of the fiber assemblies are wavily projectingly arranged to form a large number of ruggedness on the surface of the assemblies, thereby the sheet for wiping is obtained. A medicine containing an oil component is carried on such a sheet for wiping and the quantity of the oil component to be carried is from 1 to 20% of the weight of the fiber assemblies.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a commercial or household cleaning article using a nonwoven fabric and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, many materials based on non-woven fabrics have been proposed for cleaning articles. However, conventional cleaning articles, such as chemical rags, have a flat woven fabric and a non-woven fabric containing an oily substance. The impregnated one is generally used, but it has high performance such as a dust-absorbing ability to absorb and remove dirt on the surface to be cleaned, a dust-retaining ability to retain dirt removed, and a scratch-preventing property for the cleaning surface. Therefore, it has been proposed to use a softer and more bulky nonwoven fabric as a material for cleaning articles.

[0003] As a method for increasing the bulk of a nonwoven fabric as a cleaning article, as described in JP-A-64-61546, a general nonwoven fabric is formed and then subjected to post-processing such as stitching. As described in -124122,
What raises hair, also JP-A-2-160962,
As described in Japanese Patent Application Laid-Open No. 2-191422, there can be mentioned, for example, those in which stretchable or crimpable fibers are used for all or a part of the fibers constituting the nonwoven fabric.

Further, the development of a bulky nonwoven fabric has been disclosed in
As disclosed in, for example, Japanese Patent No. 64312, the use is not limited to cleaning articles, but is also applied to cushioning materials, packaging materials, surface materials of sanitary articles, and the like.

[0005]

However, the above-described bulky nonwoven fabric has the following problems. In bulking by post-processing and raising of general nonwoven fabric,
In order to express the bulkiness, a larger amount of nonwoven fabric and fiber material must be used, and once cleaning is performed by applying pressure, the contact surface with the surface to be cleaned is fixed, and as a cleaning article. Since the inner nonwoven fabric and the fibers constituting the apparent thickness of the nonwoven fabric cannot contact the surface to be cleaned, the utilization of the nonwoven fabric as the base is inefficient.

[0006] In addition, the method of producing bulky irregularities by utilizing the stretchability and crimpability of the fiber itself has a disadvantage in that the ability to adsorb and retain dirt such as fine dust is smaller than that of a general flat nonwoven fabric. Although improved, it is not possible to obtain sufficient unevenness for capturing large dirt such as bread crumbs using the unevenness of the nonwoven fabric.

Further, when the nonwoven fabric is impregnated with an oily substance, it is as easy to give a sticky feeling as when a general planar nonwoven fabric is impregnated with an oily substance, and it is easy for the user to feel uncomfortable.

The bulking of a cushion material using a nonwoven fabric is
Adhesion and welding are performed during integration of the film having bulkiness and the nonwoven fabric, and the degree of freedom of the nonwoven fabric fibers is significantly reduced. In general, nonwoven fabrics used as cleaning articles tend to have a strong bond between fibers so that fiber debris does not come out or break during cleaning. There is a problem in that the ability to collect lint, lint, hair and the like brought about by the effect is reduced.

Accordingly, an object of the present invention is to provide a nonwoven fabric fiber having a high degree of freedom in capturing large dirt such as bread crumbs and the like by utilizing the unevenness of the nonwoven fabric, as well as being excellent in the ability to adsorb and retain dirt such as fine dust. The present invention provides a cleaning article excellent in the ability to collect lint, lint, hair, and the like brought about by the entanglement effect, hardly causes fiber debris to break or break during cleaning, and has a low stickiness of the hand, and a method for manufacturing the same. That is.

[0010]

According to the present invention, there is provided a nonwoven fabric aggregate formed by entanglement of fibers of a fibrous web on one or both sides of a mesh sheet together with the entanglement between the constituent fibers thereof. Are also entangled with each other, and the cleaning agent is provided with a number of irregularities on the surface of the fiber assembly. The object has been attained by providing a cleaning article characterized by being supported by 1 to 500%.

According to the present invention, there is provided a method of manufacturing a cleaning article according to claim 1 as a method of suitably manufacturing the cleaning article, wherein a fiber web is provided on one or both sides of a heat-shrinkable mesh sheet. After laminating, the constituent fibers of the fibrous web and the reticulated sheet or the constituent fibers of the fibrous web are entangled with each other, and the fibrous web becomes a non-woven fiber aggregate and is simultaneously integrated with the reticulated sheet. Then, by heating these, by heat shrinking the net-like sheet, to provide a concavo-convex shape over the entire non-woven fiber assembly, to create a cleaning sheet, before or before heating the cleaning sheet Another object of the present invention is to provide a method for producing a cleaning article, wherein the cleaning sheet is impregnated with a drug after heating.

In the present invention, since the mesh sheet only shrinks, substantially no irregularities are formed, and the fiber aggregate does not substantially shrink and is integrated with the mesh sheet. The fiber assembly is raised to form a large number of uneven portions. In the present invention, the term “fiber aggregate” refers to a fiber in which constituent fibers are entangled, and the term “fiber web” refers to a fiber web before being entangled.

[0013]

According to the cleaning article of the present invention, the cleaning sheet comprises:
After forming a non-woven fiber aggregate integrated in the entangled state with the mesh sheet together with the entanglement between the fibers of the fiber web, the heat-shrinkable mesh sheet is shrunk, The fibers constituting the fibrous fiber aggregate are arranged in a wave-like protruding manner, increasing the degree of freedom of the fibers, and the sheet as a whole is provided with a large number of uneven shapes and becomes bulky, and from small dust, bread crumbs, hair, etc. Entangled with relatively large dust, and reliably collect a wide range of dust. In addition, due to entanglement and integration with the net-like sheet, the sheet is less likely to produce fiber debris and to be easily broken.

Further, with the amount of the drug carried in the cleaning article of the present invention, the sticky feeling of the drug is small while providing a sufficient cleaning effect.

[0015]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a cross-sectional view showing a state in which a net-like sheet and a fiber web are overlapped in an initial stage of manufacturing a cleaning sheet used in a first embodiment of the present invention, and FIG. 2 is a cleaning used in a second embodiment of the present invention. FIG. 3 is a cross-sectional view showing a state in which a net-like sheet and a fiber web are overlapped in the initial stage of production of a sheet for cleaning, FIG. 3 is a cross-sectional view of an example of a completed cleaning sheet shown in FIG. 1, and FIG. FIG. 5 is a cross-sectional view of an example of a completed sheet, FIG. 5 is a schematic view showing the entire manufacturing apparatus suitably used for manufacturing the cleaning sheet shown in FIG. 4, FIG. 6 is a plan view of a net used as a mesh sheet, 7 is a plan view of a mesh web used as a mesh sheet, FIG. 8 is a plan view of a perforated film used as a mesh sheet, and FIG. 9 is a perspective view showing a state in which a cleaning sheet is attached to a tool with a handle.

First, a cleaning article according to a first embodiment of the present invention shown in FIG. 3 will be described. In the cleaning article according to the first embodiment, a nonwoven fabric aggregate 12 formed by entanglement of fibers on one surface of a mesh sheet 11 (13, 14) is formed along with the entanglement between the constituent fibers. (13, 14) is also integrated in an entangled state, and the fiber assembly 12 has a cleaning sheet 10 on the surface of which a large number of uneven portions 12A and 12B are formed. Is supported by 0.1 to 500% of the weight of the fiber assembly 12.

The reticulated sheet 11 (13, 14) has a wide concept including a perforated film having a large number of holes. For example, a net 11 as shown in FIG. 6 and holes as shown in FIG. 7 are formed. The web includes a reticulated web 13 made of a fiber assembly with latent crimps and a perforated film 14 having many holes as shown in FIG.

As the net 11 as the net sheet, as shown in FIG. 6, a net formed as a whole in a lattice shape is used, but the net sheet 11 (13, 14) is used.
The shape of the hole formed in the hole can be variously modified. For example, as shown in FIG.
The shape may be a star shape as shown in (a), a round shape as shown in (b), and a combination of a round shape and a star shape as shown in (c). It may be.

As shown in FIG. 3, the non-joined portion of the fiber assembly 12 with the mesh sheet 11 (13, 14) is formed as a convex portion 12A, and the mesh sheet 11 (13, 1) is formed.
4) is formed as a concave portion 12B. The fiber assembly 12 has a large number of convex portions 1.
An uneven surface having cushioning properties is formed by 2A and the concave portion 12B therebetween.

The surface of the fiber assembly 12 is formed of entangled fibers, and fine dust and the like adhering to the surface to be cleaned are trapped between these constituent fibers.

The constituent fibers of the fiber assembly 12 include:
For example, polyester-based, polyamide-based, polyolefin-based thermoplastic fibers, or composite fibers thereof,
It may be any of split fibers, ultrafine fibers produced by a melt blown method or the like, semi-synthetic fibers such as acetate, regenerated fibers such as cupra and rayon, and natural fibers such as cotton, or a mixture thereof. The basis weight, fineness, fiber length, cross-sectional shape, degree of entanglement, and strength of the fiber assembly constituting the non-woven fiber assembly part are determined according to the purpose of use, taking into account workability, cost, etc. Is done.

Further, the net 11 as the mesh sheet is provided.
It is preferable to use a heat-shrinkable material, and by using such a heat-shrinkable net, the cleaning sheet 10 can be used.
In the production of, a large number of uneven portions can be formed on the surface of the fiber aggregate by heat shrinkage of the heat shrinkable net by heat treatment. Examples of the heat-shrinkable net include polyolefins, for example, polyethylene, polypropylene, polybutene, etc., polyesters, for example, polyethylene terephthalate, polybutylene terephthalate, polyamides, for example, nylon 6, nylon 66, acrylonitrile and vinyl. , Vinylidene-based, for example, polyvinyl chloride, polyvinylidene chloride or the like or a modified product thereof, an alloy, a net composed of a thermoplastic polymer such as a mixture thereof, depending on the uneven shape of the intended cleaning sheet. It is preferable that the net is woven or knitted using at least one of a warp and a weft using a filament that shrinks uniaxially or biaxially, or a filament thermally shrunk with the thermoplastic polymer, depending on the uneven shape of the intended cleaning sheet. Select as appropriate

The perforated film 14 as the mesh sheet may be made of the above-mentioned thermoplastic polymer in a uniaxial or biaxial form.
A film in which holes are provided by punching or the like in an axially contracting film can be used.

Examples of the reticulated web 13 as the reticulated sheet include monoolefin polymers and copolymers such as ethylene, propylene, and butene, high-density polyethylene, low-density polyethylene, linear low-density polyethylene, and polypropylene. , Ethylene-propylene copolymer,
Ethylene-vinyl acetate copolymer, etc., polyethylene terephthalate, ester-based polymers and copolymers such as polybutylene terephthalate, polyvinyl chloride, vinyl-based polymers such as polyvinylidene chloride, vinylidene-based polymers and copolymers,
Heat-shrinkable fibers made of polyamide-based polymers and copolymers such as nylon 6, nylon 66, etc., acrylonitrile-based polymers and copolymers, or mixtures thereof, or latent crimps that develop crimps when heated An expression fiber or a mixture of these fibers, in which the fibers are integrated in an entangled state, is used.

The reticulated web 13 is formed by forming the fibrous web into a reticulated form by a high-speed liquid flow or air flow, and the constituent fibers are entangled with each other to form a fibrous assembly sheet having a reticulated pattern. A specific pore size in a sheet-like material in which fibers are entangled and integrated,
Hole pitch, fiber aggregate sheet punched by hole pattern, etc., or constituent fibers made by other methods are integrated by entanglement, specific hole diameter, hole pitch, hole pattern Any mesh sheet may be used.

When the net 11 is used as the mesh sheet, its mesh, wire diameter, distance between lines, hole diameter, hole pitch, hole pattern, etc. are determined by the contraction force of the net 11, the net 1
It is necessary to determine in consideration of the shape and degree of the uneven portions 12A and 12B formed by the shrinkage of 1 and the partial entanglement with the nonwoven fabric aggregate. Specifically, the wire diameter is preferably 20 μm to 500 μm, more preferably 100 μm to 200 μm, and the distance between the wires is preferably 2 mm.
-30 mm, more preferably 4-20 mm.

When the mesh web 13 or the perforated film 14 is used as the mesh sheet, the opening diameter thereof is preferably 4 mm to 40 mm, more preferably 8 mm to 20 mm, and the gap between the openings is It is 2 mm to 20 mm, more preferably 4 mm to 10 mm. When a material other than the above is used as the mesh sheet, the pore size and the like can be selected according to the mesh sheet.

Next, a cleaning article according to a second embodiment of the present invention shown in FIG. 4 will be described. In the cleaning article of the second embodiment, the fiber aggregates 12 are arranged on both sides of the mesh sheet 11 (13, 14), and the fiber aggregates 12 are arranged on both sides of the mesh sheet 11 (13, 14). Except that
The configuration is the same as that of the first embodiment.

In the case of the cleaning sheet in which the fiber aggregates are arranged on both sides of the mesh sheet as in the second embodiment, the fiber aggregates on both sides of the sheet may be the same or different. By using different fiber aggregates on both sides of the sheet, for example, by using different types of constituent fibers, products that can be used on both sides of the sheet according to the purpose of use or products with different textures on both sides of the sheet It is possible.

In the cleaning article of the present invention, 0.1 to 500% by weight (based on the weight of the fiber assembly) of a drug is carried on the fiber assembly 12 of the cleaning sheet 10. Examples of such agents include those mainly containing an oil component intended for substantially dry dry cleaning, and detergents intended for substantially wet wet cleaning.

The oil component includes mineral oil, synthetic oil,
Those containing at least one of silicone oil and a surfactant are preferred.

As the mineral oil, paraffinic hydrocarbons, naphthenic hydrocarbons, aromatic hydrocarbons and the like are used.

Examples of the synthetic oil include alkylbenzene oil, polyolefin oil, and polyglycol oil. Examples of the silicone oil include chain dimethylpolysiloxane, cyclic dimethylpolysiloxane, methylhydrogenpolysiloxane, and various modified silicones. Is used.

[0034] The above-mentioned surfactant may be a cation-based surfactant.
Mono long chain alkyltrimethyl ammonium salts having an alkyl or alkenyl group having 10 to 22 carbon atoms, di long chain alkyl dimethyl ammonium salts, mono long chain alkyl dimethyl benzyl ammonium salts, and the like. ethylene (6 to 35 mol) long-chain alkyl or alkenyl (primary or secondary _C 8 -C
₂₂ ) Ether, polyoxyethylene (6-35 mol)
Examples thereof include polyethylene glycol ether type such as alkyl (C ₈ -C ₁₈ ) phenyl ether, polyoxyethylene polyoxypropylene block copolymer, and polyhydric alcohol type such as glycerin fatty acid ester, sorbitan fatty acid ester, and alkyl glycoside.
The surfactant preferably contains 5% by weight or less of water for effective cleaning.

The viscosity (25 ° C.) of the mineral oil, the synthetic oil and the silicone oil is preferably from 5 to 1000 cps, particularly preferably from 5 to 200 cps. If it is less than 5 cps, the adsorbability of dust is poor, and if it is more than 1000 cps, the oil component is difficult to spread evenly on the fiber, and the coefficient of friction with the cleaning surface increases, which may cause damage to the cleaning surface. The surface tension (25 ° C.) is preferably 15 to 45 dyn / cm, and particularly preferably 20 to 35 dyn / cm. Fifteen
If it is less than dyn / cm, the adsorbability of dust is poor, and 45 dyn
This is because if it is larger than / cm, it is difficult to spread evenly on the fibers constituting the nonwoven fabric.

The amount of the oil component to be carried is 0.1 to 80%, preferably 0.5 to 40%, based on the weight of the fiber assembly.
%, Particularly preferably 1 to 20%. By carrying at this ratio, the dust absorbing ability and the dust retaining ability can be increased. If the carried amount of the oil agent component is less than 0.1%, the dust-absorbing and dust-retaining ability is not sufficiently increased by the addition of the oil agent component, and if it is more than 80%, the sticky feeling to the hand is remarkably deteriorated. Since the cleaning article of the present invention has irregularities formed on the surface of the fiber assembly, even when a relatively large amount of the oil component is carried on the fiber assembly, the oil component adheres to the hand when touched. It is less and less sticky.

As described above, the oil component includes mineral oil,
It is preferable to include at least one or more of synthetic oil, silicone oil, and surfactant, but the ratio and type thereof, the viscosity of the oil agent, surface tension, etc., depend on the purpose of cleaning and the type of constituent fibers of the nonwoven fabric. It is determined as appropriate. Further, an antibacterial agent, a fungicide, a bactericide, and the like can be included as necessary.

The above-mentioned detergent is preferably an aqueous solution containing at least one of a surfactant, a solvent and an alkali agent.

Examples of the surfactant include nonionic, cationic, anionic and amphoteric surfactants. As the above-mentioned anionic surfactant, a usual sulfonate-based anionic surfactant and a sulfate-based anionic surfactant are used. Examples of the sulfonate-based anionic surfactant include linear or branched alkyl (C
_{8 to} C ₂₂ ) benzenesulfonate, long-chain alkyl (C
₈ -C ₂₂₎ sulfonate, long-chain olefins _(C 8 -C
₂₂ ) Sulfonates and the like. As the sulfate-based anionic surfactant, long-chain monoalkyl (C ₈
-C ₂₂₎ sulfuric acid ester salts, polyoxyethylene (1-
(6 mol) long-chain alkyl (C ₈ -C ₂₂ ) ether sulfate, polyoxyethylene (1-6 mol) alkyl (C ₈ -C ₁₈ ) phenyl ether sulfate, and the like. Cations as counter ions of these anionic surfactants include alkali metal ions such as sodium and potassium, and alkanolamine ions such as monoethanolamine, diethanolamine and triethanolamine. As the anionic surfactant, a sulfonate surfactant is preferable in terms of strong resistance to hydrolysis and the like. Further, from the viewpoint of detergency, a long-chain or branched-chain alkylbenzene sulfonate is preferred. Examples of the amphoteric surfactant include carbobetaine, sulfobetaine, and hydroxysulfobetaine having an alkyl group having 8 to 22 carbon atoms. Examples of the nonionic surfactant and the cationic surfactant include those similar to those contained in the oil component. Also,
Examples of the solvent include alcohols such as ethanol and isopropanol, glycols such as ethylene glycol and propylene glycol, and glycol ethers such as ethylene glycol monoethyl ether and propylene glycol monomethyl ether. Include alkanolamines such as monoethanolamine. Further, the cleaning agent may contain components such as a bactericide, a deodorant, and a fragrance, if necessary. The carrying amount of these detergents is preferably 50 to 500%, and more preferably 100 to 300%, based on the weight of the fiber assembly. Can be increased. If the carrying amount of the cleaning agent is less than 50%, the area that can be cleaned is too small, and if it exceeds 500%, the cleaning active substance that cannot be completely retained in the sheet during cleaning is undesirably dropped.

Further, the cleaning sheet according to the present invention can be used as a cleaning article by attaching it to a tool with a handle in addition to directly cleaning the sheet by hand operation. With the patterned tool, the form is not particularly limited,
Mop-like, handy mop-like, and hataki-like ones are preferable, and particularly, the cleaning part is preferably macroscopically planar. FIG. 9 shows an example of the above-mentioned tool with a handle, and reference numeral 40 in the figure denotes a cleaning unit thereof. In this manner, by attaching the cleaning sheet to the patterned tool, it is possible to clean hard-to-reach places such as gaps in furniture and ceilings with the cleaning sheet, and to collect fine dust once collected. The performance of the cleaning sheet, which is excellent in holding bread crumbs, hair, cotton dust, and the like, can be sufficiently exhibited.

Next, a preferred embodiment of the method for producing a cleaning article according to the present invention will be described.

As shown in FIGS. 1 and 2, the fibrous web 12 is laminated on one side or both sides of a net sheet 11 (13, 14) which is thermally contracted in one axis or two axes, and then the net sheet 11 ( 13 and 14), the fiber of the fiber web 12 on one side and the fiber of the fiber web 12 on the other side, and the fiber of the fiber web 12 and the mesh sheet 11 (13, 14).
And at the same time, each fiber web 12 is formed into a nonwoven fabric aggregate by entanglement. Thereafter, the resulting fiber aggregate is subjected to heat shrinkage of the heat-shrinkable mesh sheet 11 (13, 14) simultaneously with the drying or separately from the drying step, so that the constituent fibers of the non-woven fiber aggregate are corrugated. To form an uneven shape as a whole.

That is, as shown in FIG.
The fibrous web 12 is continuously fed out from each of the card machines 21A and 21B for making the same through the feeding device 22. On the other hand, a roll 23 of the mesh sheet 11 (13, 14) is disposed between the card machines 21A and 21B,
3 from the feeding roll 25, and the mesh sheet 11 (13, 1).
4) is paid out.

Then, the fibrous web 12 is superposed on both sides of the mesh sheet 11 (13, 14) by the above-mentioned feeding roll 22, and is carried into the water needling device 26. Here, the jet water flow causes the fibrous web 12
Fibers are entangled with the mesh sheet and the mesh sheet 11 (1
3, 14), the fiber webs 12 on both sides are entangled to produce a sheet as shown in FIG.

The fiber assembly 12 and the mesh sheet 1 after being entangled
1 (13, 14) is passed through a nip roll 27, carried into a heating device 28 for drying and heat shrinking, and subjected to heat treatment. By this heat treatment, the reticulated sheet 11 (13,
14) is thermally contracted, and as shown in FIG. 4 as an example, a convex portion 12A and a concave portion 12B are formed in the nonwoven fabric aggregate 12 entangled with the mesh sheet 11 (13, 14). In the heating step by the heating device 28, a non-woven fabric fiber assembly 12 and a heat-shrinkable mesh sheet 11 (13, 14) are integrated and treated at an appropriate temperature and time. These conditions vary depending on the heat-shrinkable net-like sheet 11 (13, 14), but may be set to a shrinkage ratio for obtaining a required uneven shape. However, in a continuous bonded sheet state, when contracting in the flow direction of the sheet, the speed difference between the inlet side and the outlet side of the heat treatment section is an important point. That is, when the tensile force is larger than the contraction stress, it is desirable that the speed ratio before and after is set to a value close to the required contraction rate.

The method of carrying the drug on the cleaning sheet is not particularly limited.
As shown in (2), the spray is applied by a spray device 31 disposed between the nip roll 29 and the winder 30. Depending on the type of the drug, the application of the drug is appropriately determined before or after the heat treatment of the fiber assembly and the reticulated sheet.

When the cleaning sheet is in a continuous sheet state,
It may be wound up in a roll shape, or may be cut into a required length and then folded and packaged as necessary.

[0048] The cleaning article after the application of the medicine is a nip roll 2
9 and is wound on a winder 30.

As shown in FIG. 1, the mesh sheet 11 (1
In the case where the fibrous web 12 is laminated on one side of (3, 14), when the non-joined portion with the mesh sheet 11 (13, 14) is formed as the convex portion 12A, the convex portion 12A is shown in FIG.
Not only when it is formed only on one side of the mesh sheet 11 (13, 14) as in
1 (13, 14) are generally formed on both surfaces at random, and there are generally cases where an uneven surface is formed as a whole.
Even when the fibrous webs 12 are laminated on both sides of the mesh sheet 11 (13, 14) as shown in FIG. 2, the constituent fibers between the fiber aggregates arranged on both sides of the mesh sheet 11 (13, 14) are mesh-like. If the entangled portions are not entangled with the sheet 11 (13, 14), the mesh sheet 1 shown in FIG.
1 (13, 14), the protruding portions 12A protruding from both surfaces are integrated with each other to form the protruding portions 12A on either side of the sheet.
Is formed, and the mesh sheet 11 (13, 1
The convex portions 12A are randomly formed on both surfaces of 4), and an uneven surface is formed as a whole, and these are all included in the embodiment of the present invention.

When a film having openings is used as the mesh sheet, or when a net having a large wire diameter or a small opening is used, the fiber aggregates existing on the front and back surfaces are strongly entangled through the holes, Since the fibers on the film or the lattice are less likely to be entangled with the apertured film or the net, the fibers on the film or the lattice are raised to form a concavo-convex shape, contrary to the above case. In particular, when a net is used as a net-like sheet and the fiber webs are laminated and entangled on both sides thereof, the fibers of the fiber web are strongly entangled with each other across the holes of the net, so that a concave portion is easily formed.

Further, the cleaning article of the present invention will be described based on specific examples. (Example 1) 1.5 denier polyester fiber, 51 mm
To form a fibrous web having a basis weight of 10 g / m ² with a conventional card, wrapping the fibrous web into three layers (30 g / m ² ) (not shown), and forming a biaxial polypropylene web as a net-like sheet. Shrinking net (5 mesh / wire diameter 0.2
mm) as an intermediate layer and the fiber webs as upper and lower layers, and then entangled by water needling. At that time, water needling was performed at a water pressure of 40 kg / cm ² , a nozzle pitch of 1.6 mm, and a speed of 5 m / min. Then 130 ° C
The net was shrunk at the same time as drying by heat treatment with hot air for 50 seconds, and then sprayed with 95% liquid paraffin and a nonionic surfactant [polyoxyethylene (average addition mole number 3.3) alkyl (C _{12 to} C
₁₃ ) Ether] 5% (a viscosity of 125 cps
, Surface tension of 30 dyn / cm) at a rate of 5% with respect to the fiber weight (weight of the fiber assembly), and an area shrinkage of 10%.
% Of the product 1 having irregularities on the surface.

(Example 2) 1.5 denier polyester fiber
6 parts 51mm, rayon fiber 3 denier 51mm
With a standard card using a mixture of 4 parts
10g / m^Two Forming a fibrous web of
5 layers (basis weight 50g / m^Two ) Wrapping (not shown)
And a biaxially shrinkable polypropylene
(5 mesh / wire diameter 0.2 mm) in the lower layer
Layers are stacked on top of each other, then entangled with water needling
I let it. At that time, the water needling is
kg / cm ^Two , Nozzle pitch 1.6mm, speed 5m / min
Was. After drying this fiber aggregate, gravure coating
More silicone (Toray Silicone SM5571) fiber
10% of the weight (weight of fiber assembly)
did. Thereafter, heat treatment is performed for 60 seconds with hot air of 130 ° C.
By contracting the net, the area shrinkage rate is 25%
Example 2 having irregularities on the surface of was obtained.

(Example 3) 1.5 denier polyester fiber
5 parts of 51 mm, 1.5 denier rayon fiber,
A standard card made by kneading 5 parts of 51 mm
With a basis weight of 10 g / m ^Two Forming a fibrous web of
2 layers (basis weight 20g / m^Two ) Wrapping (shown)
B) shrink the polypropylene biaxially as a mesh sheet.
Net (5 mesh / wire diameter 0.2 mm) as the intermediate layer
After laminating the web into upper and lower layers, water needling
Entangled with At that time, the water needling
Water pressure 40kg / cm^Two , Nozzle pitch 1.6mm, speed 5m /
Made in min. Then, for 30 seconds with hot air of 145 ° C
The heat treatment during the heat shrinks the net simultaneously with drying.
After spraying, spray with a nonionic surfactant [Polio
Xylene (average number of moles added: 5) alkyl (C₁₂~
C₁₃) Ether] 0.5%, ethanol 5% and professional
An aqueous solution containing 5% pyrene glycol monomethyl ale
Of the drug consisting of 1 to the fiber weight (the weight of the fiber assembly)
Apply at a rate of 20%, concave on the surface with 15% area shrinkage
A product 3 having protrusions was obtained.

(Comparative product 1) A comparative product 1 having no surface irregularities except for the shrinking step in Example 1 was used. In other respects, the comparative product 1 was prepared in the same manner as the working product 1.

(Comparative product 2) The comparative product 2 in which the drug was not applied in the working product 1 was used. In other respects, Comparative Product 2 was prepared in the same manner as Working Product 1.

(Comparative product 3) Using polyester fiber of 1.5 denier and 51 mm, a standard card weight of 10 g / m2 was used.
² of the fibrous web, and the fibrous web was
g / m ² ) (not shown) and entangled by water needling. At that time, water needling was performed at a water pressure of 40 kg / cm ² , a nozzle pitch of 1.6 mm, and a speed of 5 m / min. Thereafter, the same medicine as that of the product 1 was applied by spraying to obtain a comparative product 3.

(Comparative product 4) Using 1.5 denier polyester fiber and 51 mm, a standard card having a basis weight of 10 g / m 2 was used.
A fibrous web of No. ² was formed, and the fibrous web was wrapped (not shown) into five layers (basis weight: 50 g / m ² ) and entangled by water needling. At this time, the water needling was performed at a water pressure of 40 kg / cm ² , a nozzle pitch of 600 nozzles / m, and a speed of 5 m / min. The fiber assembly was sprayed with the same agent as in Example 1, and a rubber catane thread (manufactured by Ushida Co., Ltd.) was applied at a stretching rate of 125% in the flow direction.
A pleated sheet having a shrinkage rate of 25% was manufactured by sewing with a sewing machine at various places, and this was designated as Comparative Product 4.

(Comparative product 5) In Comparative product 3, as a raw material of the fibrous web, PP (polypropylene) crimped fiber 1.5
A product using a denier of 51 mm was designated as Comparative Product 5.

(Comparative product 6) A heat-shrinkable PP (polypropylene) film having no opening on one side of Comparative product 3 was partially heat-sealed by ultrasonic waves, and then heat-treated with hot air at 110 ° C. for 30 seconds. As a result, a comparative product 6 having an area shrinkage of 10% and having irregularities on the surface was obtained.

The following evaluations were made on each of the above-described working products and comparative products. The results are shown in Table 1 below.

1. Dust collection ability 1g of 7 kinds of test dust (JIS Z8901) having a composition of 30 × 30cm and close to the composition of soil and dust is uniformly spread, and 7 × 11
The above-mentioned each embodiment and the comparative product were attached and fixed to a sponge having a size of cm, and the amount of dust adsorbed on each of the above-mentioned implementation products and the comparative product after 10 reciprocations was taken as the amount of adsorption.

Further, the sponge was dropped 10 times from a height of 30 cm with the surface of each of the actual product and the comparative product affixed to the above sponge face down to remove excess dust, and then the above-described actual product and the comparative product were compared. The amount of dust remaining in the sample was evaluated as a retained amount.

2. Hair collecting ability Spread about 10cm of human hair so that 10 hairs do not overlap tightly, and apply and fix the above product and comparative product on a sponge of 7x11cm size, and reciprocate 3 times on it.
A sensory evaluation was performed on the ease of removing the hair and the difficulty of removing the hair.

The criteria for the sensory evaluation are as follows. ：: 10 to 8 hairs were securely taken, and it was difficult to remove the hairs. ：: 10 to 8 hairs are surely taken, but the taken pieces may fall off. Δ: 7 to 5 hairs are taken, but the hair is easy to remove. X: Five or more hairs are not taken.

3. Bread crumb collecting ability Spread 1 g of bread crumbs (Nisshin Flour Milling Co., Ltd. soft bread crumbs) in the area of 30 × 30 cm, and paste the above-mentioned practical products and comparative products on a 7 × 11 cm sponge. The sample was fixed and reciprocated three times, and a sensory evaluation was performed on the ease with which bread crumbs were removed and the difficulty with which bread crumbs were dropped.

The criteria for the sensory evaluation are as follows. ：: Almost all bread crumbs were reliably removed, and it was difficult to remove the bread crumbs. ：: Most of the bread crumbs are removed, but the bread crumbs may fall off. Δ: Some bread crumbs are removed, but the bread crumbs are easily removed. X: Almost no bread crumbs are removed.

4. Effective use of non-woven fabric 1 g of 7 kinds of test dust (JIS Z8901) having a composition of soil and dust is spread uniformly over a 30 × 30 cm area, and 7 × 11
Each of the above-mentioned practical products and the comparative product were stuck and fixed on a sponge having a size of cm, and reciprocated 10 times, and the degree of contamination on the surface of the cleaning article was visually evaluated.

The criteria for the visual evaluation are as follows. ：: Most area of the cleaning article is stained with dust. Δ: Not all surfaces of the cleaning article, but 50% or more of the area is soiled. X: The area of less than 50% of the cleaning article is dirty.

5. Stickiness The sensory evaluation of stickiness when each of the above-mentioned practical products and the comparative product were touched by hand was performed.

The criteria for the sensory evaluation are as follows. ：: Almost no stickiness is felt. Δ: Some stickiness is felt. X: Very sticky feeling.

[0071]

[Table 1]

As is clear from Table 1, according to the cleaning article of this embodiment, the amount of dust adsorbed, the amount of retained dust, the ability to collect hair, the ability to collect bread crumbs, the effective use of nonwoven fabric, Good results were obtained in all points of each evaluation item of stickiness. On the other hand, each of the comparative products is inferior in terms of the amount of dust adsorbed and the amount of retained dust. Even if some evaluations are good, other evaluations cannot be satisfied.

That is, according to the present embodiment, it is possible to obtain an effect that it is excellent in dust-absorbing and dust-retaining properties, excellent in collecting large dust such as hair and bread crumbs, and hardly sticky to hands. Play.

The present invention is not limited to the above-described embodiment, but can be variously modified without departing from the gist of the present invention.

For example, the method of carrying the medicine on the cleaning sheet may be such that the cleaning sheet is immersed in the medicine.

[0076]

According to the cleaning article of the present invention, not only is it excellent in the ability to adsorb and retain dirt such as fine dusts, but also it is possible to capture large dirt such as bread crumbs and the like by utilizing the unevenness of the nonwoven fabric. Excellent in collecting dust, lint, hair etc. brought by the entanglement effect of high non-woven fibers,
In addition, fiber scraps are not easily taken out or broken during cleaning, and the feeling of stickiness of hands is small.

Further, according to the method for producing a cleaning article of the present invention, the above-mentioned cleaning article can be suitably produced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a state in which a mesh sheet and a fiber web are overlapped in an initial stage of manufacturing a cleaning sheet used in a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state in which a net-like sheet and a fiber web are superimposed in an initial stage of manufacturing a cleaning sheet used in a second embodiment of the present invention.

FIG. 3 is a sectional view of an example of a completed product of the cleaning sheet shown in FIG. 1;

FIG. 4 is a sectional view of an example of a completed cleaning sheet shown in FIG. 2;

FIG. 5 is a schematic view showing an entire manufacturing apparatus suitably used when manufacturing the cleaning sheet shown in FIG. 4;

FIG. 6 is a plan view of a net used as a mesh sheet.

FIG. 7 is a plan view of a mesh web used as a mesh sheet.

FIG. 8 is a plan view of a perforated film used as a mesh sheet.

FIG. 9 is a perspective view showing a state in which a cleaning sheet is attached to a tool with a handle.

[Explanation of symbols]

 Reference Signs List 10 Cleaning sheet 11 (13, 14) Reticulated sheet 12 Fiber aggregate (or fiber web) 12A Convex part 12B Concave part

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[Procedure amendment]

[Submission date] December 28, 2001 (2001.12.
28)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

Patent application title: Dry cleaning sheet and manufacturing method thereof

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dry cleaning sheet for business and household use using a nonwoven fabric and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, many materials based on non-woven fabrics have been proposed for cleaning articles. However, conventional cleaning articles, such as chemical rags, have a flat woven fabric and a non-woven fabric containing an oily substance. The impregnated one is generally used, but it has high performance such as a dust-absorbing ability to absorb and remove dirt on the surface to be cleaned, a dust-retaining ability to retain dirt removed, and a scratch-preventing property for the cleaning surface. Therefore, it has been proposed to use a softer and more bulky nonwoven fabric as a material for cleaning articles.

[0003] As a method for increasing the bulk of a nonwoven fabric as a cleaning article, as described in JP-A-64-61546, a general nonwoven fabric is formed and then subjected to post-processing such as stitching. As described in -124122,
What raises hair, also JP-A-2-160962,
As described in Japanese Patent Application Laid-Open No. 2-191422, there can be mentioned, for example, those in which stretchable or crimpable fibers are used for all or a part of the fibers constituting the nonwoven fabric.

Further, the development of a bulky nonwoven fabric has been disclosed in
As disclosed in, for example, Japanese Patent No. 64312, the use is not limited to cleaning articles, but is also applied to cushioning materials, packaging materials, surface materials of sanitary articles, and the like.

[0005]

However, the above-described bulky nonwoven fabric has the following problems. In bulking by post-processing and raising of general nonwoven fabric,
In order to express the bulkiness, a larger amount of nonwoven fabric and fiber material must be used, and once cleaning is performed by applying pressure, the contact surface with the surface to be cleaned is fixed, and as a cleaning article. Since the inner nonwoven fabric and the fibers constituting the apparent thickness of the nonwoven fabric cannot contact the surface to be cleaned, the utilization of the nonwoven fabric as the base is inefficient.

[0006] In addition, the method of producing bulky irregularities by utilizing the stretchability and crimpability of the fiber itself has a disadvantage in that the ability to adsorb and retain dirt such as fine dust is smaller than that of a general flat nonwoven fabric. Although improved, it is not possible to obtain sufficient unevenness for capturing large dirt such as bread crumbs using the unevenness of the nonwoven fabric.

In addition, when the nonwoven fabric is impregnated with an oily substance, it is easy to give a sticky feeling and discomfort to a user as well as when a general flat nonwoven fabric is impregnated with an oily substance.

The bulking of a cushion material using a nonwoven fabric is
Adhesion and welding are performed during integration of the film having bulkiness and the nonwoven fabric, and the degree of freedom of the nonwoven fabric fibers is significantly reduced. In general, nonwoven fabrics used as cleaning articles tend to have a strong bond between fibers so that fiber debris does not come out or break during cleaning. There is a problem in that the ability to collect lint, lint, hair and the like brought about by the effect is reduced.

Accordingly, an object of the present invention is to provide a nonwoven fabric fiber having a high degree of freedom in capturing large dirt such as bread crumbs and the like by utilizing the unevenness of the nonwoven fabric, as well as being excellent in the ability to adsorb and retain dirt such as fine dust. Dry cleaning sheet having excellent ability to collect lint, lint, hair, etc. brought about by the entanglement effect of fiber, hardly causing fiber debris or tearing during cleaning, and having less sticky hand, and a method for manufacturing the same. It is to be.

[0010]

According to the present invention, there is provided a nonwoven fabric aggregate formed by entanglement of fibers of a fibrous web on one or both sides of a mesh sheet together with the entanglement between the constituent fibers thereof. Are also integrated in an entangled state, and the fibers of the fiber assembly
A cleaning sheet having a large number of irregularities formed on the surface thereof in a protruding arrangement to carry an agent containing an oil agent component.
Becomes, Sea for dry cleaning the carrying amount of the oil agent component is characterized in that 1 to 20% based on the weight of the fiber aggregate
The above objectives have been achieved by providing a project .

[0011] The present invention provides a method for suitably producing the dry cleaning sheet, a manufacturing method of a sheet for dry cleaning according to claim 1, on one or both sides of a net-like sheets of heat-shrinkable After laminating the fibrous webs, the constituent fibers of the fibrous web and the reticulated sheet or the constituent fibers of the fibrous web are entangled with each other, and the fibrous web becomes a non-woven fiber aggregate and is simultaneously integrated with the reticulated sheet. After that, these are heated, and the mesh sheet is thermally shrunk, so that an uneven shape is provided over the entire non-woven fiber assembly to form a cleaning sheet, and the heating of the cleaning sheet is performed. The present invention also provides a method for producing a dry cleaning sheet , characterized by impregnating the cleaning sheet with an agent containing an oil component before or after heating.

[0012] In the present invention, as a net-like sheet, heat collection
Even when a shrinkable mesh sheet is used, the mesh sheet is heated.
Even if it only shrinks, substantially no irregularities are formed, and the fiber aggregate does not substantially shrink and is integrated with the mesh sheet, so the fiber aggregate in the mesh rises. A number of uneven portions are formed. In the present invention, the fiber aggregate is
It refers to those in which the constituent fibers are entangled.
The one before being entangled.

[0013]

According to the dry cleaning sheet of the present invention, the cleaning sheet forms a non-woven fabric-like fiber aggregate that is entangled with the mesh sheet together with the entanglement between the fibers of the fiber web. Preferably, since then , since the heat-shrinkable net-like sheet is shrunk, the fibers constituting the nonwoven fabric fiber assembly are arranged in a wave-like protruding manner to increase the degree of freedom of the fibers, and as a whole sheet Has a large number of irregularities and becomes bulky, and entangles from small dust to relatively large dust such as breadcrumbs and hair, and reliably collects a wide range of dust. In addition, due to entanglement and integration with the net-like sheet, the sheet is less likely to produce fiber debris and to be easily broken.

Furthermore, with the amount of drug carried on the dry cleaning sheet of the present invention, the sticky feeling due to the drug is small while providing a sufficient cleaning effect.

[0015]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a cross-sectional view showing a state in which a net-like sheet and a fiber web are overlapped in an initial stage of manufacturing a cleaning sheet used in a first embodiment of the present invention, and FIG. 2 is a cleaning used in a second embodiment of the present invention. FIG. 3 is a cross-sectional view showing a state in which a net-like sheet and a fiber web are overlapped in the initial stage of production of a sheet for cleaning, FIG. 3 is a cross-sectional view of an example of a completed cleaning sheet shown in FIG. 1, and FIG. FIG. 5 is a cross-sectional view of an example of a completed sheet, FIG. 5 is a schematic view showing the entire manufacturing apparatus suitably used for manufacturing the cleaning sheet shown in FIG. 4, FIG. 6 is a plan view of a net used as a mesh sheet, 7 is a plan view of a mesh web used as a mesh sheet, FIG. 8 is a plan view of a perforated film used as a mesh sheet, and FIG. 9 is a perspective view showing a state in which a cleaning sheet is attached to a tool with a handle.

[0016] First, dry the first embodiment of the present invention shown in FIG. 3
The type cleaning sheet will be described. Dry of the first embodiment
The cleaning sheet is a nonwoven fabric-like fiber assembly 12 formed by entanglement of fibers on one side of a mesh sheet 11 (13, 14).
Together with the entanglement between the constituent fibers of the mesh sheet 11 (1
3, 14) are also integrated in an entangled state, and the fiber assembly 12 has a large number of uneven portions 1 on its surface.
Oil is applied to the cleaning sheet 10 on which 2A and 12B are formed.
Ing and sputum by lifting the agent containing the component.

The reticulated sheet 11 (13, 14) has a wide concept including a perforated film having a large number of holes. For example, a net 11 as shown in FIG. 6 and holes as shown in FIG. 7 are formed. The web includes a reticulated web 13 made of a fiber assembly with latent crimps and a perforated film 14 having many holes as shown in FIG.

As the net 11 as the net sheet, as shown in FIG. 6, a net formed as a whole in a lattice shape is used, but the net sheet 11 (13, 14) is used.
The shape of the hole formed in the hole can be variously modified. For example, as shown in FIG.
The shape may be a star shape as shown in (a), a round shape as shown in (b), and a combination of a round shape and a star shape as shown in (c). It may be.

As shown in FIG. 3, the non-joined portion of the fiber assembly 12 with the mesh sheet 11 (13, 14) is formed as a convex portion 12A, and the mesh sheet 11 (13, 1) is formed.
4) is formed as a concave portion 12B. The fiber assembly 12 has a large number of convex portions 1.
An uneven surface having cushioning properties is formed by 2A and the concave portion 12B therebetween.

The surface of the fiber assembly 12 is formed of entangled fibers, and fine dust and the like adhering to the surface to be cleaned are trapped between these constituent fibers.

The constituent fibers of the fiber assembly 12 include:
For example, polyester-based, polyamide-based, polyolefin-based thermoplastic fibers, or composite fibers thereof,
It may be any of split fibers, ultrafine fibers produced by a melt blown method or the like, semi-synthetic fibers such as acetate, regenerated fibers such as cupra and rayon, and natural fibers such as cotton, or a mixture thereof. The basis weight, fineness, fiber length, cross-sectional shape, degree of entanglement, and strength of the fiber assembly constituting the non-woven fiber assembly are determined according to the purpose of use, taking into account workability, cost, etc. Is done.

Further, the net 11 as the mesh sheet is provided.
It is preferable to use a heat-shrinkable material, and by using such a heat-shrinkable net, the cleaning sheet 10 can be used.
In the production of, a large number of uneven portions can be formed on the surface of the fiber aggregate by heat shrinkage of the heat shrinkable net by heat treatment. Examples of the heat-shrinkable net include polyolefins, for example, polyethylene, polypropylene, polybutene, etc., polyesters, for example, polyethylene terephthalate, polybutylene terephthalate, polyamides, for example, nylon 6, nylon 66, acrylonitrile and vinyl. , Vinylidene-based, for example, polyvinyl chloride, polyvinylidene chloride or the like or a modified product thereof, an alloy, a net composed of a thermoplastic polymer such as a mixture thereof, depending on the uneven shape of the intended cleaning sheet. It is preferable that the net is woven or knitted using at least one of a warp and a weft using a filament that shrinks uniaxially or biaxially, or a filament thermally shrunk with the thermoplastic polymer, depending on the uneven shape of the intended cleaning sheet. Select as appropriate

The perforated film 14 as the mesh sheet may be made of the above-mentioned thermoplastic polymer in a uniaxial or biaxial form.
A film in which holes are provided by punching or the like in an axially contracting film can be used.

Examples of the reticulated web 13 as the reticulated sheet include monoolefin polymers and copolymers such as ethylene, propylene, and butene, high-density polyethylene, low-density polyethylene, linear low-density polyethylene, and polypropylene. , Ethylene-propylene copolymer,
Ethylene-vinyl acetate copolymer, etc., polyethylene terephthalate, ester-based polymers and copolymers such as polybutylene terephthalate, polyvinyl chloride, vinyl-based polymers such as polyvinylidene chloride, vinylidene-based polymers and copolymers,
Heat-shrinkable fibers made of polyamide-based polymers and copolymers such as nylon 6, nylon 66, etc., acrylonitrile-based polymers and copolymers, or mixtures thereof, or latent crimps that develop crimps when heated An expression fiber or a mixture of these fibers, in which the fibers are integrated in an entangled state, is used.

The reticulated web 13 is formed by forming the fibrous web into a reticulated form by a high-speed liquid flow or air flow, and the constituent fibers are entangled with each other to form a fibrous assembly sheet having a reticulated pattern. A specific pore size in a sheet-like material in which fibers are entangled and integrated,
Hole pitch, fiber aggregate sheet punched by hole pattern, etc., or constituent fibers made by other methods are integrated by entanglement, specific hole diameter, hole pitch, hole pattern Any mesh sheet may be used.

When the net 11 is used as the mesh sheet, its mesh, wire diameter, distance between lines, hole diameter, hole pitch, hole pattern, etc. are determined by the contraction force of the net 11, the net 1
It is necessary to determine in consideration of the shape and degree of the uneven portions 12A and 12B formed by the shrinkage of 1 and the partial entanglement with the nonwoven fabric aggregate. Specifically, the wire diameter is preferably 20 μm to 500 μm, more preferably 100 μm to 200 μm, and the distance between the wires is preferably 2 mm.
-30 mm, more preferably 4-20 mm.

When the mesh web 13 or the perforated film 14 is used as the mesh sheet, the opening diameter thereof is preferably 4 mm to 40 mm, more preferably 8 mm to 20 mm, and the gap between the openings is It is 2 mm to 20 mm, more preferably 4 mm to 10 mm. When a material other than the above is used as the mesh sheet, the pore size and the like can be selected according to the mesh sheet.

Next, the drying of the second embodiment of the present invention shown in FIG.
The cleaning sheet will be described. Dry of the second embodiment
The cleaning sheet of the type is obtained by arranging the fiber aggregates 12 on both sides of the mesh sheet 11 (13, 14).
The configuration is the same as that of the above-described first embodiment, except that 2 is disposed on both sides of the mesh sheet 11 (13, 14).

In the case of the cleaning sheet in which the fiber aggregates are arranged on both sides of the mesh sheet as in the second embodiment, the fiber aggregates on both sides of the sheet may be the same or different. By using different fiber aggregates on both sides of the sheet, for example, by using different types of constituent fibers, products that can be used on both sides of the sheet according to the purpose of use or products with different textures on both sides of the sheet It is possible.

[0030] Dry cleaning sheet of the present invention responsible lifting the agent to the fiber assembly 12 of the cleaning sheet 10. Such agents, also be mentioned that a main substantially oil component for the purpose of dry dry cleaning.

The oil component includes mineral oil, synthetic oil,
Those containing at least one of silicone oil and a surfactant are preferred.

As the mineral oil, paraffinic hydrocarbons, naphthenic hydrocarbons, aromatic hydrocarbons and the like are used.

Examples of the synthetic oil include alkylbenzene oil, polyolefin oil, and polyglycol oil. Examples of the silicone oil include chain dimethylpolysiloxane, cyclic dimethylpolysiloxane, methylhydrogenpolysiloxane, and various modified silicones. Is used.

[0034] The above-mentioned surfactant may be a cation-based surfactant.
Mono long chain alkyltrimethyl ammonium salts having an alkyl or alkenyl group having 10 to 22 carbon atoms, di long chain alkyl dimethyl ammonium salts, mono long chain alkyl dimethyl benzyl ammonium salts, and the like. ethylene (6 to 35 mol) long-chain alkyl or alkenyl (primary or secondary C ₈ ~
C ₂₂₎ ethers, polyoxyethylene (6-35 moles)
Examples thereof include polyethylene glycol ether type such as alkyl (C ₈ -C ₁₈ ) phenyl ether, polyoxyethylene polyoxypropylene block copolymer, and polyhydric alcohol type such as glycerin fatty acid ester, sorbitan fatty acid ester and alkyl glycoside.
The surfactant preferably contains 5% by weight or less of water for effective cleaning.

The viscosity (25 ° C.) of the mineral oil, the synthetic oil and the silicone oil is preferably from 5 to 1000 cps, particularly preferably from 5 to 200 cps. If it is less than 5 cps, the adsorbability of dust is poor, and if it is more than 1000 cps, the oil component is difficult to spread evenly on the fiber, and the coefficient of friction with the cleaning surface increases, which may cause damage to the cleaning surface. The surface tension (25 ° C.) is preferably 15 to 45 dyn / cm, and particularly preferably 20 to 35 dyn / cm. Fifteen
If it is less than dyn / cm, the adsorbability of dust is poor, and 45 dyn
This is because if it is larger than / cm, it is difficult to spread evenly on the fibers constituting the nonwoven fabric.

The carrying amount of the oil component, Yes and the 1-20% by the weight of the fiber aggregate, by carrying at this ratio, it is possible to increase the dust suction capacity, the Hochirino . If the carried amount of the oil component is less than 0.1%, the dust-absorbing and dust-retaining ability is not sufficiently increased by the addition of the oil component, and is 80%.
This is because when the size is larger, the feeling of stickiness to the hands is significantly deteriorated. Since the dry cleaning sheet of the present invention has irregularities formed on the surface of the fiber assembly, even if a relatively large amount of the oil component is carried on the fiber assembly, the oil component adheres to the hand when touched. With less stickiness.

As described above, the oil component includes mineral oil,
It is preferable to include at least one or more of synthetic oil, silicone oil, and surfactant, but the ratio and type thereof, the viscosity of the oil agent, surface tension, etc., depend on the purpose of cleaning and the type of constituent fibers of the nonwoven fabric. It is determined as appropriate. Further, an antibacterial agent, a fungicide, a bactericide, and the like can be included as necessary.

(Delete)

(Delete)

Further, the cleaning sheet according to the present invention can be used as a cleaning article by attaching it to a tool with a handle in addition to directly cleaning the sheet by hand operation. With the patterned tool, the form is not particularly limited,
Mop-like, handy mop-like, and hataki-like ones are preferable, and particularly, the cleaning part is preferably macroscopically planar. FIG. 9 shows an example of the above-mentioned tool with a handle, and reference numeral 40 in the figure denotes a cleaning unit thereof. In this manner, by attaching the cleaning sheet to the patterned tool, it is possible to clean hard-to-reach places such as gaps in furniture and ceilings with the cleaning sheet, and to collect fine dust once collected. The performance of the cleaning sheet, which is excellent in holding bread crumbs, hair, cotton dust, and the like, can be sufficiently exhibited.

Next, a preferred embodiment of the method for producing a dry cleaning sheet according to the present invention will be described.

As shown in FIGS. 1 and 2, a fibrous web 12 is laminated on one or both sides of a net sheet 11 (13, 14) that is thermally contracted in one axis or two axes, and then the net sheet 11 ( 13 and 14), the fiber of the fiber web 12 on one side and the fiber of the fiber web 12 on the other side, and the fiber of the fiber web 12 and the mesh sheet 11 (13, 14).
At the same time, each fiber web 12 is formed into a nonwoven fabric aggregate by entanglement. Thereafter, the resulting fiber aggregate is subjected to heat shrinkage of the heat-shrinkable mesh sheet 11 (13, 14) simultaneously with the drying or separately from the drying step, so that the constituent fibers of the non-woven fiber aggregate are corrugated. To form an uneven shape as a whole.

That is, as shown in FIG.
The fibrous web 12 is continuously fed out from each of the card machines 21A and 21B for making the same through the feeding device 22. On the other hand, a roll 23 of the mesh sheet 11 (13, 14) is disposed between the card machines 21A and 21B,
3 from the feeding roll 25, and the mesh sheet 11 (13, 1).
4) is paid out.

Then, the fibrous web 12 is superposed on both sides of the mesh sheet 11 (13, 14) by the above-mentioned feeding roll 22, and is carried into the water needling device 26. Here, the jet water flow causes the fibrous web 12
Fibers are entangled with the mesh sheet and the mesh sheet 11 (1
3, 14), the fiber webs 12 on both sides are entangled to produce a sheet as shown in FIG.

The fiber assembly 12 and the mesh sheet 1 after being entangled
1 (13, 14) is passed through a nip roll 27, carried into a heating device 28 for drying and heat shrinking, and subjected to heat treatment. By this heat treatment, the reticulated sheet 11 (13,
14) is thermally contracted, and as shown in FIG. 4 as an example, a convex portion 12A and a concave portion 12B are formed in the nonwoven fabric aggregate 12 entangled with the mesh sheet 11 (13, 14). In the heating step by the heating device 28, a non-woven fabric fiber assembly 12 and a heat-shrinkable mesh sheet 11 (13, 14) are integrated and treated at an appropriate temperature and time. These conditions vary depending on the heat-shrinkable net-like sheet 11 (13, 14), but may be set to a shrinkage ratio for obtaining a required uneven shape. However, in a continuous bonded sheet state, when contracting in the flow direction of the sheet, the speed difference between the inlet side and the outlet side of the heat treatment section is an important point. That is, when the tensile force is larger than the contraction stress, it is desirable that the speed ratio before and after is set to a value close to the required contraction rate.

The method of carrying the drug on the cleaning sheet is not particularly limited.
As shown in (2), the spray is applied by a spray device 31 disposed between the nip roll 29 and the winder 30. Depending on the type of the drug, the application of the drug is appropriately determined before or after the heat treatment of the fiber assembly and the reticulated sheet.

When the cleaning sheet is in a continuous sheet state,
It may be wound up in a roll shape, or may be cut into a required length and then folded and packaged as necessary.

The dry cleaning sheet after the application of the agent is wound up by a winder 30 via a nip roll 29.

As shown in FIG. 1, the mesh sheet 11 (1
In the case where the fibrous web 12 is laminated on one side of (3, 14), when the non-joined portion with the mesh sheet 11 (13, 14) is formed as the convex portion 12A, the convex portion 12A is shown in FIG.
Not only when it is formed only on one side of the mesh sheet 11 (13, 14) as in
1 (13, 14) are generally formed on both surfaces at random, and there are generally cases where an uneven surface is formed as a whole.
Even when the fibrous webs 12 are laminated on both sides of the mesh sheet 11 (13, 14) as shown in FIG. 2, the constituent fibers between the fiber aggregates arranged on both sides of the mesh sheet 11 (13, 14) are mesh-like. If the entangled portions are not entangled with the sheet 11 (13, 14), the mesh sheet 1 shown in FIG.
1 (13, 14), the protruding portions 12A protruding from both surfaces are integrated with each other to form the protruding portions 12A on either side of the sheet.
Is formed, and the mesh sheet 11 (13, 1
The convex portions 12A are randomly formed on both surfaces of 4), and an uneven surface is formed as a whole, and these are all included in the embodiment of the present invention.

When a film having openings is used as the mesh sheet, or when a net having a large wire diameter or a small opening is used, the fiber aggregates existing on the front and back surfaces are strongly entangled through the holes, Since the fibers on the film or the lattice are less likely to be entangled with the apertured film or the net, the fibers on the film or the lattice are raised to form a concavo-convex shape, contrary to the above case. In particular, when a net is used as a net-like sheet and the fiber webs are laminated and entangled on both sides thereof, the fibers of the fiber web are strongly entangled with each other across the holes of the net, so that a concave portion is easily formed.

Further, based on specific examples, the present invention
The dry cleaning sheet will be described. In addition, reference product 1
Wet type with cleaning agent carrying cleaning agent on cleaning sheet
A cleaning sheet that carries the drug in Reference 1
The cleaning sheet before the cleaning is applied to the oil in Examples 1 and 2.
Same as the cleaning sheet before carrying the drug containing the component
It is like. (Example 1) 1.5 denier polyester fiber, 51 mm
To form a fibrous web having a basis weight of 10 g / m ² with a conventional card, wrapping the fibrous web into three layers (30 g / m ² ) (not shown), and forming a biaxial polypropylene web as a net-like sheet. Shrinking net (5 mesh / wire diameter 0.2
mm) as an intermediate layer and the fiber webs as upper and lower layers, and then entangled by water needling. At that time, water needling was performed at a water pressure of 40 kg / cm ² , a nozzle pitch of 1.6 mm, and a speed of 5 m / min. Then 130 ° C
The net was shrunk simultaneously with drying by heat treatment with hot air for 50 seconds, and then sprayed with liquid paraffin 95% and a nonionic surfactant [polyoxyethylene (average added mole number 3.3) alkyl (C ₁₂ to
C ₁₃ ) ether] 5% (viscosity 125 cps
, Surface tension of 30 dyn / cm) at a rate of 5% with respect to the fiber weight (weight of the fiber assembly), and an area shrinkage of 10%.
% Of the product 1 having irregularities on the surface.

(Example 2) 1.5 denier polyester fiber
6 parts 51mm, rayon fiber 3 denier 51mm
With a standard card using a mixture of 4 parts
10g / m^Two Forming a fibrous web of
5 layers (basis weight 50g / m^Two ) Wrapping (not shown)
And a biaxially shrinkable polypropylene
(5 mesh / wire diameter 0.2 mm) in the lower layer
Layers are stacked on top of each other, then entangled with water needling
I let it. At that time, the water needling is
kg / cm ^Two , Nozzle pitch 1.6mm, speed 5m / min
Was. After drying this fiber aggregate, gravure coating
More silicone (Toray Silicone SM5571) fiber
10% of the weight (weight of fiber assembly)
did. Thereafter, heat treatment is performed for 60 seconds with hot air of 130 ° C.
By contracting the net, the area shrinkage rate is 25%
Example 2 having irregularities on the surface of was obtained.

(Reference article 11.5) polyester fiber
5 parts of 51 mm, 1.5 denier rayon fiber,
A standard card made by kneading 5 parts of 51 mm
With a basis weight of 10 g / m ^Two Forming a fibrous web of
2 layers (basis weight 20g / m^Two ) Wrapping (shown)
B) shrink the polypropylene biaxially as a mesh sheet.
Net (5 mesh / wire diameter 0.2 mm) as the intermediate layer
After laminating the web into upper and lower layers, water needling
Entangled with At that time, the water needling
Water pressure 40kg / cm^Two , Nozzle pitch 1.6mm, speed 5m /
Made in min. Then, for 30 seconds with hot air of 145 ° C
The heat treatment during the heat shrinks the net simultaneously with drying.
After spraying, spray with a nonionic surfactant [Polio
Xylene (average number of moles added: 5) alkyl (C₁₂~ C
₁₃) Ether] 0.5%, ethanol 5% and propyle
Glycol monomethyl acrylateTeFrom an aqueous solution containing 5%
Is added to the fiber weight (weight of the fiber aggregate) by 12
It is applied at a rate of 0%, and the surface shrinkage rate is 15%
HavingReference article 1I got

(Comparative product 1) A comparative product 1 having no surface irregularities except for the shrinking step in Example 1 was used. In other respects, the comparative product 1 was prepared in the same manner as the working product 1.

(Comparative product 2) The comparative product 2 in which the drug was not applied in the working product 1 was used. In other respects, Comparative Product 2 was prepared in the same manner as Working Product 1.

(Comparative product 3) Using polyester fiber of 1.5 denier and 51 mm, a standard card weight of 10 g / m2 was used.
² of the fibrous web, and the fibrous web was
g / m ² ) (not shown) and entangled by water needling. At that time, water needling was performed at a water pressure of 40 kg / cm ² , a nozzle pitch of 1.6 mm, and a speed of 5 m / min. Thereafter, the same medicine as that of the product 1 was applied by spraying to obtain a comparative product 3.

(Comparative product 4) Using 1.5 denier polyester fiber and 51 mm, a standard card having a basis weight of 10 g / m 2 was used.
A fibrous web of No. ² was formed, and the fibrous web was wrapped (not shown) into five layers (basis weight: 50 g / m ² ) and entangled by water needling. At this time, the water needling was performed at a water pressure of 40 kg / cm ² , a nozzle pitch of 600 nozzles / m, and a speed of 5 m / min. The fiber assembly was sprayed with the same agent as in Example 1, and a rubber catane thread (manufactured by Ushida Co., Ltd.) was applied at a stretching rate of 125% in the flow direction.
A pleated sheet having a shrinkage rate of 25% was manufactured by sewing with a sewing machine at various places, and this was designated as Comparative Product 4.

(Comparative product 5) In Comparative product 3, as a raw material of the fibrous web, PP (polypropylene) crimped fiber 1.5
A product using a denier of 51 mm was designated as Comparative Product 5.

(Comparative product 6) A heat-shrinkable PP (polypropylene) film having no opening on one side of Comparative product 3 was partially heat-sealed by ultrasonic waves, and then heat-treated with hot air at 110 ° C. for 30 seconds. As a result, a comparative product 6 having an area shrinkage of 10% and having irregularities on the surface was obtained.

[0060] Each embodiment sample described above, reference materials 1 and Comparative products
For their respective, we were evaluated as follows. The results are shown in Table 1 below.

1. Dust collection ability 1g of 7 kinds of test dust (JIS Z8901) having a composition of 30 × 30cm and close to the composition of soil and dust is uniformly spread, and 7 × 11
Dust adsorbed on each of the above-mentioned practical products , reference product 1 and each comparative product by sticking and fixing the above-mentioned practical products , reference product 1 and each comparative product to a sponge having a size of cm and reciprocating 10 times. Was taken as the amount of adsorption.

Further, the surface of each of the actual product, the reference product 1 and the comparative product attached to the sponge was 30 cm in height with the surface thereof facing down.
Then, the sponge was dropped 10 times to remove excess dust, and the amount of dust remaining in each of the above-mentioned practical products , reference products 1 and each comparative product was evaluated as a holding amount.

2. The long hair harvesting capability's hair 10cm sprayed so as not to overlap the ten-tight, 7 × 11cm size sponge to the above-described products, ginseng
The product in which the product 1 and the comparative product were attached and fixed was reciprocated three times on the product, and the sensory evaluation was performed on the ease of removing and dropping the hair.

The criteria for the sensory evaluation are as follows. ：: 10 to 8 hairs were securely taken, and it was difficult to remove the hairs. ：: 10 to 8 hairs are surely taken, but the taken pieces may fall off. Δ: 7 to 5 hairs are taken, but the hair is easy to remove. X: Five or more hairs are not taken.

3. Bread crumb collecting ability Spread 1 g of bread crumb (Nisshin Flour Milling Co., Ltd. soft bread crumbs) in a 30 × 30 cm area, and sprinkle a 7 × 11 cm sponge on each of the above-mentioned practical products , reference products 1 and each comparison. The product was attached and fixed, and reciprocated three times on the product, and the sensory evaluation was performed on the ease with which bread crumbs were removed and the difficulty with which bread crumbs were dropped.

The criteria for the sensory evaluation are as follows. ：: Almost all bread crumbs were reliably removed, and it was difficult to remove the bread crumbs. ：: Most of the bread crumbs are removed, but the bread crumbs may fall off. Δ: Some bread crumbs are removed, but the bread crumbs are easily removed. X: Almost no bread crumbs are removed.

4. Effective use of non-woven fabric 1 g of 7 kinds of test dust (JIS Z8901) having a composition of soil and dust is spread uniformly over a 30 × 30 cm area, and 7 × 11
Each of the above-mentioned practical products , the reference product 1 and each of the comparative products were adhered and fixed to a sponge having a size of cm, and reciprocated 10 times, and the degree of dirt on the surface of the cleaning sheet was visually evaluated.

The criteria for the visual evaluation are as follows. ：: Most area of the cleaning sheet is stained with dust. Δ: Not all surfaces of the cleaning sheet , but 50% or more of the area is soiled. X: The area of less than 50% of the cleaning sheet is dirty.

5. Stickiness The sensory evaluation of the stickiness when each of the above-mentioned practical products , reference product 1 and each comparative product were touched by hand was performed.

The criteria for the sensory evaluation are as follows. ：: Almost no stickiness is felt. Δ: Some stickiness is felt. X: Very sticky feeling.

[0071]

[Table 1]

As is clear from Table 1, the product of this embodiment and
According to the cleaning sheet for reference and reference products ,
Good results were obtained in all of the evaluation items of the dust retention amount, the hair collecting ability, the bread crumb collecting ability, the effective utilization of the nonwoven fabric, and the stickiness. On the other hand, each of the comparative products is inferior in terms of the amount of dust adsorbed and the amount of retained dust. Even if some evaluations are good, other evaluations cannot be satisfied.

That is, according to the present embodiment, it is possible to obtain an effect that it is excellent in dust-absorbing and dust-retaining properties, excellent in collecting large dust such as hair and bread crumbs, and hardly sticky to hands. Play.

The present invention is not limited to the above-described embodiment, but can be variously modified without departing from the gist of the present invention.

For example, the method of carrying the medicine on the cleaning sheet may be such that the cleaning sheet is immersed in the medicine.

[0076]

According to the dry cleaning sheet of the present invention, not only is it excellent in the ability to adsorb and retain dirt such as fine dusts, but also it is possible to capture and freely remove large dirt such as bread crumbs by using the unevenness of the nonwoven fabric. It is excellent in collecting cotton dust, lint, hair and the like brought about by the high degree of entanglement of non-woven fibers, and hardly gives out fiber fibers or tears during cleaning and has little sticky hand.

Further, according to the method for producing a dry cleaning sheet of the present invention, the above-mentioned dry cleaning sheet can be suitably produced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a state in which a mesh sheet and a fiber web are overlapped in an initial stage of manufacturing a cleaning sheet used in a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state in which a net-like sheet and a fiber web are superimposed in an initial stage of manufacturing a cleaning sheet used in a second embodiment of the present invention.

FIG. 3 is a sectional view of an example of a completed product of the cleaning sheet shown in FIG. 1;

FIG. 4 is a sectional view of an example of a completed cleaning sheet shown in FIG. 2;

FIG. 5 is a schematic view showing an entire manufacturing apparatus suitably used when manufacturing the cleaning sheet shown in FIG. 4;

FIG. 6 is a plan view of a net used as a mesh sheet.

FIG. 7 is a plan view of a mesh web used as a mesh sheet.

FIG. 8 is a plan view of a perforated film used as a mesh sheet.

FIG. 9 is a perspective view showing a state in which a cleaning sheet is attached to a tool with a handle.

[Description of Signs] 10 Cleaning sheet 11 (13, 14) Reticulated sheet 12 Fiber aggregate (or fiber web) 12A Convex part 12B Concave part

Continuing on the front page F term (reference) 3B074 AA01 AA02 AA07 AA08 AB01 CC03 4F100 AJ01B AJ01C AJ01H AK01A AK07 AK41 AK52B AK52C AK52H AK54H BA02 BA03 CA12B CA12C DC16A DD01B15A01 DG12A13 DG12A13 DG12A13 DG12A15 YY00C YY00H 4L047 AA14 AA21 AA29 AB02 BA04 CA04 CA12 CB10 CC16

Claims (4)

[Claims] 1. A nonwoven fabric aggregate formed by entanglement of fibers of a fibrous web on one or both sides of a reticulated sheet. The cleaning sheet, in which the fibers of the fiber assembly are integrally arranged, and the fibers of the fiber assembly are arranged in a wave-like protruding manner and a large number of irregularities are formed on the surface thereof, carry an agent containing an oil agent component. A dry cleaning sheet, wherein the carried amount of the oil agent component is 1 to 20% based on the weight of the fiber assembly. 2. The reticulated sheet is a heat-shrinkable net obtained by stretching, or a heat-shrinkable net woven or knitted by a stretched thermoplastic resin filament. The sheet for dry cleaning according to claim 1, characterized in that: 3. The oil component is a mineral oil, a synthetic oil or a silicone oil, and the viscosity of the oil component (25 ° C.) is 5 to 5.
The dry cleaning sheet according to claim 1, wherein the sheet is 1000 cps. 4. The method for producing a dry cleaning sheet according to claim 1, wherein a fiber web is laminated on one or both sides of the heat-shrinkable mesh sheet, and then the constituent fibers of the fiber web and the mesh sheet or The constituent fibers of the fibrous web are entangled with each other, and after the fibrous web becomes a nonwoven fabric fiber aggregate and is integrated with the mesh sheet at the same time, these are heated to thermally shrink the mesh sheet. Thereby, a concavo-convex shape is provided over the entire nonwoven fabric aggregate to form a cleaning sheet, and the cleaning sheet is impregnated with a chemical containing an oil component before or after heating the cleaning sheet. A method for manufacturing a dry cleaning sheet.