JPH0617361A - Bulky sheet - Google Patents

Abstract

PURPOSE:To obtain a bulky sheet, excellent in fouling adsorptivity and holding ability, having soft hand and suitable as a cleaning sheet by integrally entangling a nonwoven fabric-like fiber assembly containing thermally fusible fiber on one or both sides of a reticular sheet, simultaneously forming an uneven part and supporting a medicine thereon. CONSTITUTION:The objective bulky sheet is obtained by laminating a nonwoven fabriclike fiber assembly containing 1-99wt.%, preferably 3-70wt.%, more preferably 5-50wt.% core-sheath type or side-by-side type thermally fusible conjugate fiber composed of a low- and a high-melting components on one or both sides of a thermally shrinkable reticular sheet, then carrying out water needling treatment, entangling and integrating the both, subsequently performing drying or heat shrinking treatment, forming an uneven part on the surface and then applying an oiling agent such as a mineral oil, a synthetic oil, a silicone oil or a surfactant or a medicine such as a detergent in an amount of 0.1-500wt.% based on the weight of the fiber assembly thereto.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bulky sheet in which the surface of the sheet has an uneven shape, and more particularly to a commercial or household cleaning article (cleaning sheet), a cleaning material, and a sanitary article. The present invention relates to a bulky sheet used as a surface material or a cushion material.

[0002]

2. Description of the Related Art As a cleaning article (cleaning sheet),
For example, a rag or a non-woven cloth which is a wet or dry cleaning cloth, a rag or a chemical cloth in which a flat woven cloth or a non-woven cloth is impregnated with an oily substance, or a thread-like cloth typified by a mop is bundled. There is a wet type or a dry type that is used in a different shape, and these cleaning articles are widely used in homes, offices, stores, buildings, factories, etc. according to the purpose.

As a conventional cleaning cloth, which is a cleaning cloth, is generally a flat woven cloth or a non-woven cloth impregnated with an oily substance as described above.
It has been proposed to use a softer and more bulky non-woven fabric as a material for cleaning articles in order to improve the dust absorption ability to remove, the dust retention ability to retain the taken dirt, and the scratch resistance of the cleaning surface. There is.

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 post-processed such as stitching. As described in Japanese Patent No. 124122,
What is raised, and JP-A-2-160962,
As described in Japanese Patent Application Laid-Open No. 2-191422, there may be mentioned ones that use stretchable or crimpable fibers for all or part of the fibers constituting the nonwoven fabric.

Further, the development of a bulky non-woven fabric is described in JP-A-1-1-1.
As in Japanese Patent No. 64312, its use is not limited to cleaning articles, but is also applied to cushion materials, packaging materials, surface materials for sanitary goods, and the like.

[0006]

However, the above-mentioned bulky nonwoven fabric has the following problems. For bulking by general post-processing of non-woven fabric and bulking by raising,
In order to express bulkiness, a larger amount of non-woven fabric and fiber raw material must be used, and once pressure is applied for cleaning, the contact surface with the surface to be cleaned is fixed, and as a cleaning article, Since the inner layer non-woven fabric and fibers forming the apparent thickness of the non-woven fabric cannot contact the surface to be cleaned, the utilization of the non-woven fabric as the substrate is inefficient.

In addition, the method of producing bulky unevenness by utilizing the stretchability and crimpability of the fiber itself has a capability of adsorbing and retaining dirt such as fine dust as compared with a general planar nonwoven fabric. Although improved, the unevenness is not sufficient to capture large dirt such as bread crumbs by utilizing the unevenness of the nonwoven fabric.

When the non-woven fabric is impregnated with an oily substance, the non-woven fabric is apt to give a sticky feeling as in the case where a general planar non-woven fabric is impregnated with an oily substance, and the user is apt to feel uncomfortable.

The bulkiness of the cushion material using the non-woven fabric is
When a film having bulkiness imparting property and a non-woven fabric are integrated, they are adhered and welded to each other, so that the degree of freedom of the non-woven fabric fiber is remarkably reduced. In general, non-woven fabrics as cleaning articles tend to have strong fiber-to-fiber joints so as not to generate or tear fiber wastes during cleaning, but a decrease in the degree of freedom of non-woven fabrics is due to the entanglement of non-woven fabrics. There is a problem of reducing the ability to collect cotton dust, lint, hair, etc., which is brought about by the effect.

Further, as a cleaning sheet, the non-woven fabric fibers are less likely to fall off (fluffing) when the sheet is cleaned by friction between the surface of the sheet and the surface to be cleaned or when it is caught by a protrusion on the surface to be cleaned. Excellent anti-fluffing property is required.

Therefore, the object of the present invention is not only excellent in adsorption and retention of dirt such as fine dust, but also capture of large dirt such as bread crumbs by utilizing the unevenness of the nonwoven fabric and the nonwoven fabric fiber having a high degree of freedom. A bulky sheet that is excellent in the ability to collect cotton dust, lint, hair, etc., which is brought about by the entanglement effect, and also has excellent fluff removal resistance, and also has good flexibility and texture, and is suitable as a cleaning sheet, etc. To provide.

[0012]

According to the present invention, a non-woven fabric-like fiber aggregate formed by entanglement of fibers is formed on one or both sides of a reticulated sheet together with the entanglement between its constituent fibers. Is also integrated in a entangled state, a large number of uneven portions are formed on the surface of the fiber assembly, and the constituent fibers of the fiber assembly that are entangled on at least one surface of the mesh sheet are heat-melted. The above-mentioned object is achieved by providing a bulky sheet containing adhesive fibers.

In the present invention, since the mesh sheet only shrinks and no unevenness is formed substantially, and the fiber aggregate does not substantially shrink and is integrated with the mesh sheet, A large number of large irregularities are formed.
In addition, in the present invention, the fiber aggregate refers to one in which constituent fibers are entangled, and the fiber web refers to one before being entangled.

[0014]

In the bulky sheet of the present invention, the fibers constituting the non-woven fabric fiber assembly are arranged in a wavy pattern to have a high degree of freedom of the fiber, and the sheet as a whole is provided with a large number of irregular shapes to be bulky. Therefore, when used as a cleaning sheet, it entangles from small dust to relatively large dust such as bread crumbs and hair, and reliably collects a wide range of dust. In the bulky sheet of the present invention, the constituent fibers of the fiber assembly include the heat-fusible fibers, and the constituent fibers are fused to each other, so that the constituent fibers do not fall off during cleaning, and With the above heat-fusible fiber, the net-like sheet and the fiber assembly are firmly bonded to each other even with a small bonding area without losing the degree of freedom of the fiber.

[0015]

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a cross-sectional view showing a state in which a mesh sheet and a fibrous web are superposed at the initial stage of manufacturing the bulky sheet of the first embodiment of the present invention, and FIG. 2 is a manufacture of the bulky sheet of the second embodiment of the present invention. FIG. 3 is a cross-sectional view showing a state in which the mesh sheet and the fibrous web are superposed in the initial stage.
Is a cross-sectional view of an example of the finished bulky sheet shown in FIG. 1, and FIG. 4 is a cross-sectional view of an example of the finished bulky sheet shown in FIG.
FIG. 5 is a schematic view showing the whole manufacturing apparatus suitably used for manufacturing the bulky sheet shown in FIG. 4, FIG. 6 is a plan view of a net used as a mesh sheet, and FIG. 7 is 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 plan view showing a state in which a cleaning sheet is attached to a tool with a handle.

First, the bulky sheet 10 of the first embodiment of the present invention shown in FIG. 3 will be described. The bulky sheet 10 of the first embodiment is a nonwoven fabric-like fiber assembly 1 formed by entanglement of fibers on one surface of a mesh sheet 11 (13, 14).
2 and the mesh sheet 11 (1
3 and 14) are also integrated in an entangled state, and a large number of uneven portions 12A are formed on the surface of the fiber assembly 12.
12B is formed, and the constituent fibers of the fiber assembly 12 include heat-fusible fibers.

The mesh sheet 11 (13, 14) is a broad concept including a perforated film having a large number of holes. For example, the net 11 shown in FIG. 6 and the holes shown in FIG. 7 are formed. It includes a reticulated web 13 made of a latent crimp expressing fiber aggregate and a perforated film 14 having a large number of holes as shown in FIG.

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

Further, as shown in FIG. 3, in the fiber assembly 12, the non-joining portion with the mesh sheet 11 (13, 14) is formed as a convex portion 12A, and the mesh sheet 11 (13, 1) is formed.
The joint portion with 4) is formed as a concave portion 12B. The fiber assembly 12 has a large number of convex portions 1
An uneven surface made of cushion is formed by 2A and the concave portion 12B between them.

The surface of the fiber assembly 12 is composed of entangled fibers, and particularly when it is used as a cleaning sheet, fine dust or the like attached to the surface to be cleaned between these constituent fibers. Is designed to capture.

The heat-fusible fibers contained in the fiber assembly 12 as its constituent fibers are the fiber assembly 1 described above.
A fiber containing a component having a melting point of at least 10 ° C. or more higher than the melting points of the other constituent fibers of 2 is preferable, for example, a core-sheath type composite fiber having a high melting point polymer as a core component and a low melting point polymer as a sheath component, or A side-by-side type composite fiber in which a high melting point polymer and a low melting point polymer are joined is used,
A low melting point polymer fiber having a single component is also used. Examples of the combination of the high-melting point polymer and the low-melting point polymer forming the above-mentioned composite fiber include polypropylene / polyethylene, polyethylene terephthalate / polyethylene, high-melting point polyester / low-melting point polyester and the like. Examples of the low melting point polymer that constitutes the low melting point polymer fiber include polyethylene, an ethylene copolymer, a vinyl chloride copolymer, and a low melting point polyester.

When the heat-shrinkable sheet is used as the mesh sheet 11 (13, 14), the heat-fusible fiber has a melting point lower than the shrinking temperature of the heat-shrinkable sheet. It is preferable that, by using such a heat-fusible fiber, in the production of the bulky sheet 10, the shrinkage of the heat-shrinkable sheet and the bonding of the fiber assembly 12 and the heat-shrinkable sheet and the fiber are performed at the same time. The constituent fibers of the aggregate 12 can be fused with each other.

The content of the heat-fusible fiber in the fiber assembly 12 is preferably 1 to 99% by weight, more preferably 3 to 70% by weight, and particularly preferably 5 to 50% by weight.
Is. When the content of the heat-fusible fiber is less than 1% by weight, it cannot be said that the effect of preventing the fibers from falling off is sufficient.
When it exceeds 9% by weight, the flexibility, fiber freedom and texture of the bulky sheet are deteriorated.

The constituent fibers of the fiber assembly 12 other than the heat-fusible fibers include, for example, synthetic fibers such as polyester fibers, polyamide fibers, polyolefin fibers, acrylic fibers, and the like. Composite fibers using the above resin, semi-synthetic fibers such as acetate fibers, recycled fibers such as cupra and rayon, natural fibers such as cotton, hemp, and wool, or blended cotton are used.

The basis weight of the fiber assembly 12 and the fineness, fiber length, cross-sectional shape, entanglement degree and strength of the constituent fibers are as follows.
It is decided according to the purpose of use by comprehensively considering the workability and cost.

Also, the net 11 as the mesh sheet.
It is preferable to use a heat-shrinkable sheet, and by using such a heat-shrinkable net, the bulky sheet 10
In the production of, heat-shrinking of the heat-shrinkable net by heat treatment can form a large number of uneven portions on the surface of the fiber assembly. Examples of the heat-shrinkable net include polyolefins such as polyethylene, polypropylene and polybutene, polyesters such as polyethylene terephthalate and polybutylene terephthalate, polyamides such as nylon 6, nylon 66, acrylonitrile and vinyl. System, vinylidene-based, for example, polyvinyl chloride, polyvinylidene chloride and the like or modified products thereof, alloys, a net composed of a thermoplastic polymer such as a mixture thereof, the uneven shape of the desired bulky sheet Depending on the uniaxial or biaxial contraction,
Alternatively, a net woven or knitted using at least one of warp yarns and weft yarns, which is made of the above-mentioned thermoplastic polymer and which is heat-shrinkable, is preferable, and is appropriately selected according to the uneven shape of the target bulky sheet.

As the perforated film 14 as the mesh sheet, the thermoplastic polymer is uniaxial or biaxial.
A film that is provided with holes by punching or the like can be used as the film that contracts in the axial direction.

Further, the reticulated web 13 as the reticulated sheet includes monoolefin polymers and copolymers such as ethylene, propylene and butene, high density polyethylene, low density polyethylene, linear low density polyethylene, polypropylene, ethylene. -Propylene copolymer, ethylene-vinyl acetate copolymer, etc., polyethylene terephthalate, polybutylene terephthalate, etc. ester-based polymers and copolymers, polyvinyl chloride, polyvinylidene chloride, etc., vinyl-based, vinylidene-based polymers Heat-shrinkable fibers made of polymers, polyamide-based polymers and copolymers such as nylon 6, nylon 66, acrylonitrile-based polymers and copolymers, or a mixture thereof, or crimping by heating Latent crimp expressing fiber, or
It is composed of a mixture of these fibers, and these fibers are integrated with each other in an entangled state.For example, a fiber web composed of the above-mentioned constituent fibers is formed into a reticulated form by a high-speed liquid flow or air flow. And the constituent fibers are entangled with each other, a fiber aggregate sheet having a net-like pattern, and a specific pore diameter, a hole pitch, and a hole pattern in a sheet-like product in which the constituent fibers are entangled with each other and integrated. A fiber assembly sheet or the like that is perforated by punching or the like is used.

When the net 11 is used as the mesh sheet, the wire diameter, the distance between the wires, the hole diameter, the hole pitch, the hole pattern, etc. are determined by the shrinkage force of the net 11 and the uneven portion 12A formed by the shrinkage of the net 11. , 12B, and the degree and the degree of entanglement with the fiber assembly 12, but usually the wire diameter is preferably 20 μm to 500 μm, more preferably 100 μm to 2
It is good to set it to 00 μm, and the distance between lines is preferably 2
mm to 30 mm, more preferably 4 mm to 20 mm.

Further, when the reticulated web 13 or the perforated film 14 is used as the reticulated sheet, the aperture diameter thereof is preferably 4 mm to 40 mm, more preferably 8 mm to 20 mm, and the aperture diameter thereof is preferably 4 mm to 40 mm. The gap between the holes is
Preferably 2 mm to 20 mm, more preferably 4 mm to 10 mm
Is. When a reticulated sheet other than the above is used, the pore size and the like can be selected according to the reticulated sheet.

Next, the bulky sheet 10 of the second embodiment of the present invention shown in FIG. 4 will be described. The bulky sheet 10 of the second embodiment is one in which the fiber aggregates 12 are arranged on both sides of the mesh sheet 11 (13, 14).
The structure is the same as that of the above-described first embodiment, except that 2 is arranged on both sides of the mesh sheet 11 (13, 14).

In the case of the bulky 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. Different types of fiber aggregates on both sides of the sheet, for example, different types of heat-fusible fibers or different types of constituent fibers are used, so that they can be used on both sides of the sheet depending on the purpose of use. It is possible to make a product that can be processed or a product that has different textures on both sides of the sheet.

In the bulky sheet of the present invention, 0.1 to 500% by weight (based on the weight of the fiber assembly) of the drug can be supported on the fiber assembly. In particular, when the bulky sheet of the present invention is used as a cleaning sheet, it is preferable to appropriately carry a chemical agent according to the required function on the fiber assembly. Examples of such a chemical include those mainly containing an oil agent component for the purpose of substantially dry dry cleaning, and detergents for the purpose of substantially wet wet cleaning.

As the above oil component, mineral oil, synthetic oil,
Those containing at least one of silicone oil and surfactant are preferable. Paraffin hydrocarbons, naphthene hydrocarbons, aromatic hydrocarbons and the like are used as the mineral oil.

Alkylbenzene oil, polyolefin oil, polyglycol oil and the like are used as the synthetic oil, and chain dimethylpolysiloxane, cyclic dimethylpolysiloxane, methylhydrogenpolysiloxane and various modified silicones are used as the silicone oil.

The above-mentioned surfactants are, as a cationic system,
Examples include mono long-chain alkyl trimethyl ammonium salts, di long-chain alkyl dimethyl ammonium salts, mono long-chain alkyl dimethyl benzyl ammonium salts, etc., having an alkyl group or an alkenyl group having 10 to 22 carbon atoms. ethylene (6 to 35 mol) long-chain alkyl or alkenyl (primary or secondary C ₈ ~
C ₂₂₎ ethers, polyoxyethylene (6-35 moles)
Alkyl (C ₈ ~C ₁₈₎ polyethylene glycol ether type such as phenyl ethers, polyoxyethylene polyoxypropylene block copolymers or glycerol fatty acid esters, sorbitan fatty acid esters, polyhydric alcohol type such as alkyl glycosides and the like.
The surfactant preferably contains water in an amount of 5% by weight or less in order to effectively perform washing.

The viscosity (25 ° C.) of the above oil component is 5 to 1
000 cps is preferable, and 5-200 cps is particularly preferable. If it is less than 5 cps, the dust adsorption is poor and 100
When it is greater than 0 cps, the oil component is difficult to spread evenly on the fiber, and the coefficient of friction with the cleaning surface increases, which causes damage to the cleaning surface. Surface tension (25 ℃) is 15
To 45 dyn / cm are preferred, and 20 to 35 are particularly preferred.
dyn / cm. If it is less than 15 dyn / cm, the adsorptivity of dust is poor, and if it is more than 45 dyn / cm, it becomes difficult to evenly spread it on the fibers constituting the nonwoven fabric.

The supported amount of the above oil agent component is 0.1 to 80%, preferably 0.5 to 40%, with respect to the weight of the fiber assembly.
It is particularly preferable to set it to 1 to 20%, and it is possible to increase the dust absorption ability and the dust holding ability by carrying the content in this proportion. This is because if the amount of the oil agent component carried is less than 0.1%, the increase in dust absorption and dust holding ability due to the addition of the oil agent component is not sufficient, and if it is more than 80%, the feeling of stickiness on the hand is markedly deteriorated. The bulky sheet of the present invention, because the uneven portion is formed on the surface of the fiber assembly, even when the oil agent component is carried on the fiber assembly, the adhesion of the oil agent component to the hand when touched is small, It has little stickiness.

As described above, the oil component is a mineral oil,
Synthetic oil, silicone oil, it is preferable to contain at least one or more of the surfactant, the proportion and type, the viscosity of the oil agent, the surface tension, etc., depending on the purpose of cleaning and the type of constituent fibers of the nonwoven fabric. It can be decided as appropriate. Further, the oil agent component may contain an antibacterial agent, an antifungal agent, a bactericidal agent and the like, if necessary.

The cleaning agent is preferably an aqueous solution containing at least one of a surfactant, a solvent and an alkaline agent.

As the above-mentioned surfactant, nonionic type, positive type
Various active agents such as ionic, anionic, amphoteric
Be done. As the above-mentioned anionic surfactant, a usual sulfite is used.
Honate anionic surfactant, sulfate anion
An on-type surfactant is used. Sulfonate anion
The straight-chain or branched alkyl (C ₈
~ C_{twenty two}) Benzene sulfonate, long-chain alkyl (C₈~
C_{twenty two}) Sulfonates, long-chain olefins (C₈~ C_{twenty two}) Su
There are ruphonate, etc. Also, sulfate anion
As the surfactant, long-chain monoalkyl (C₈~ C_{twenty two})
Sulfate ester salt, polyoxyethylene (1 to 6 mol) length
Chain alkyl (C₈~ C_{twenty two}) Ether sulfate ester,
Lioxyethylene (1-6 mol) alkyl (C₈~
C₁₈) Phenyl ether sulfate ester salt and the like. this
As a counterion for anionic surfactants
Is an alkali metal ion such as sodium or potassium,
Noethanolamine, diethanolamine, triethano
And alkanolamine ions such as oleamine. Addition
From the viewpoint of strong resistance to water splitting, anionic interface
As the active agent, sulfonate-based surfactants are preferred.
Yes. Furthermore, from the viewpoint of detergency, a long-chain or branched-chain alkylbenze
Sulfonate is preferred. In addition, the above amphoteric surface activity
As the agent, a carboxylic acid having an alkyl group having 8 to 22 carbon atoms is used.
Bobetaine, sulfobetaine, hydroxysulfobetaine
And the like. In addition, the nonionic surfactants and
And the above cationic surfactants,
The same thing as included is mentioned. In addition, the above
Agents include alcohols such as ethanol and isopropanol.
, Ethylene glycol, propylene glycol, etc.
Glycols, ethylene glycol monoethyl ether
And propylene glycol monomethyl ether, etc.
Coal ethers may be mentioned, and as the above-mentioned alkaline agent,
For example, alkanolamines such as monoethanolamine
Is mentioned. In addition, the above cleaning agents may be sterilized if necessary.
Ingredients such as agents, deodorants and fragrances may be included.
The loading amount of these cleaning agents is based on the weight of the fiber assembly.
50 to 500%, preferably 100 to 300%
It is good, and by supporting it in this ratio, it will be
It is possible to increase the cleaning effect such as that. Cleaning agent
If the supported amount is less than 50%, the cleanable area is too small,
Also, if it exceeds 500%, it may not be retained in the sheet during cleaning.
Not washing active substance dripping undesirably.

Furthermore, when the bulky sheet of the present invention is used as a cleaning sheet, it can be used as a cleaning article by attaching it to a tool with a handle in addition to directly cleaning the sheet with hands. . Although the form of the patterned tool is not particularly limited, moped-like, handy-mop-like, and hataki-like tools can be cited, and the cleaning part is preferably planar when viewed macroscopically. FIG. 9 shows an example of the above-mentioned tool with a handle, and reference numeral 40 in the figure is a cleaning section thereof. In this way, by attaching the cleaning sheet to a tool with a handle, it is possible to clean a hard-to-reach place such as a gap in furniture or the ceiling 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, etc., can be sufficiently exerted.

The above-mentioned bulky sheet of the present invention is, for example,
When a heat-shrinkable sheet is used as the mesh sheet, it is manufactured as follows. As shown in FIGS. 1 and 2, the mesh sheet 11 (13, 1) that is uniaxially or biaxially heat-shrinkable.
After laminating the fibrous web 12 on one side or both sides of 4), the fibers of the fibrous web 12 on one side of the reticulated sheet 11 (13, 14) and the fibrous web 12 on the other side of the mesh sheet 11 (13, 14), and the fibrous web 12 fibers and mesh sheet 11 (1
(3, 14) are entangled and integrated, and at the same time, the fibrous webs 12, 12 are entangled to form a non-woven fiber aggregate. Then, the obtained fiber assembly is subjected to heat-shrinkable mesh sheet 11 (13, 1) at the same time as the drying or separately from the drying step.
By heat-shrinking 4), the constituent fibers of the non-woven fiber assembly are arranged in a wavy pattern to form a concavo-convex shape as a whole.

That is, as shown in FIG.
The fibrous web 12 is continuously fed out through the feeding device 22 from each of the card machines 21A and 21B for making. On the other hand, the roll 23 of the mesh sheet 11 (13, 14) is arranged between the card machines 21A and 21B, and the roll 2
3 to the reticulated sheet 11 (13, 1)
4) is paid out.

Then, the fiber webs 12 are superposed on both sides of the reticulated sheet 11 (13, 14) by the pay-out rolls 22 and are carried into the water needling device 26. Here, due to the jet water flow, the fiber web 12
Fibers of the mesh sheet and the mesh sheet 11 (1
3, 14) are entangled with each other on both sides of the fiber aggregate 12 to prepare a sheet as shown in FIG.

Fiber assembly 12 and mesh sheet 1 after entanglement
1 (13, 14) is passed through a nip roll 27, carried into a heating device 28 for drying and heat shrinking, and heat treated. By this heat treatment, the mesh sheet 11 (13,
14) heat-shrinks to form convex portions 12A and concave portions 12B on the nonwoven fabric-like fiber aggregate 12 entangled with the mesh sheet 11 (13, 14) as shown in FIG. 4 as an example. In the heating step by the heating device 28, the non-woven fiber aggregate 12 and the heat-shrinkable mesh sheet 11 (13, 14) are integrated at a suitable temperature and time. These conditions differ depending on the heat-shrinkable mesh sheet 11 (13, 14), but may be set to a shrinkage ratio for obtaining the required uneven shape. However, in the continuous joined sheet state, when shrinking in the sheet flow direction, the speed difference between the inlet side and the outlet side of the heat treatment section becomes an important point. That is, when the tensile force is larger than the shrinkage stress, it is desirable to match the front and rear speed ratios to those close to the required shrinkage ratio.

When the drug is carried on the fiber assembly of the bulky sheet, the method is not particularly limited, but for example, as shown in FIG. 5, the nip roll 2 is used.
It is applied by means of a spray device 31 arranged between 9 and winder 30. Even if the drug is applied before the heat treatment,
The heat treatment may be performed after the heat treatment, but when the heat treatment is performed before the heat treatment, it is preferable to provide a preliminary drying device between the nip roll 27 and the heating device 28 and carry the drug after the drying by the device. In particular, when a detergent is used as a chemical, it is desirable to perform it after heat treatment.

When the bulky sheet is in the continuous sheet state,
It may be wound into a roll, or may be subsequently cut to a required length, folded if necessary, and packaged. The bulky sheet after the chemical is applied is wound around the winder 30 via the nip roll 29.

As shown in FIG. 1, the mesh sheet 11 (1
3, 14), when the fiber web 12 is laminated on one side, when the non-joint portion with the mesh sheet 11 (13, 14) is formed as the convex portion 12A, the convex portion 12A is formed as shown in FIG.
Not only when it is formed only on one surface of the mesh sheet 11 (13, 14) as described above, the convex portions 12A are randomly formed on both surfaces of the mesh sheet 11 (13, 14), and the uneven surface is formed as a whole. It is generally formed, and similarly, when the fibrous web 12 is laminated on both surfaces of the mesh sheet 11 (13, 14) as shown in FIG. 2, both surfaces of the mesh sheet 11 (13, 14) are also formed. When the constituent fibers between the fiber assemblies arranged in the above are also entangled at the non-joint portion with the mesh sheet 11 (13, 14), the fibers are exposed on both sides of the mesh sheet 11 (13, 14) in FIG. The protruding portions 12A are integrally formed on one side of the sheet.
2A will be formed, and the mesh sheet 11 (13,
The convex portions 12A are randomly formed on both surfaces of 14), and the concave and convex surfaces are formed as a whole, all of which are included in the examples of the present invention.

When a film having openings is used as the mesh sheet, and when a net having a large wire diameter or a small opening is used, the fiber aggregates existing on the front and back sides are strongly entangled with each other through the holes, Since the fibers on the film or on the lattice are unlikely to be entangled with the apertured film or net, the fibers on the film or on the lattice are raised to form an uneven shape, contrary to the above case. In particular,
When a net is used as the mesh sheet and the fiber aggregates are laminated and entangled on both sides of the net, the fibers of the fiber aggregate are strongly entangled with each other with the holes of the net interposed therebetween, so that the concave portions are easily formed.

Furthermore, the bulky sheet of the present invention will be described based on specific examples. (Practical product 1: the same fiber aggregate is arranged on both sides of a mesh sheet) Polyester fiber 1.5 denier, 51 mm
A polypropylene / polyethylene core / sheath fiber 3 denier, 51 mm mixed with a polyester fiber / core / sheath fiber = 7/3 weight ratio, and using a conventional card, a fiber web having a basis weight of 10 g / m ² is obtained. The fiber web is formed into three layers (30 g / m ² ) and wrapped (not shown), and a biaxially shrinkable polypropylene net (5 mesh / diameter 0.2 mm) is used as a mesh sheet in the intermediate layer. The webs were laminated on top and bottom and then entangled with a water needling. At that time, the water needling pressure is 40
kg / cm ² , nozzle pitch 1.6 mm, speed 5 m / min. Then, the net is shrunk at the same time as drying by heat treatment with hot air of 130 ° C. for 50 seconds,
Liquid paraffin 95% and nonionic surfactant [polyoxyethylene (average added mole number 3.
3) alkyl (C ₁₂ -C ₁₃₎ ether] consisting of 5 percent oil component (viscosity 125 cps, surface tension 30 dyn / cm) was applied at a rate of 5% relative to the fiber weight, area shrinkage ratio is 2
A working product 1 having 0% surface irregularities was obtained.

The area shrinkage ratio is calculated by the following equation (1).

[0053]

## EQU00001 ## Area shrinkage (%) = 100-A.times.B.times.100 (1) where A and B are as follows. A = (length of one side after heat shrink in the vertical direction) / (length of one side before heat shrink in the vertical direction) B = (length of one side after heat shrink in the horizontal direction) / (heat in the horizontal direction) (Length of one side before contraction)

(Practical example 2: one in which different fiber aggregates are arranged on both sides of a reticulated sheet) Polyester fiber 3 denier, 51 mm and polypropylene / polyethylene core-sheath fiber 3 denier, 51 mm were used as raw materials for the upper fiber web. Polyester fiber / core-sheath fiber = 3/7 weight-blend, and as a raw material for the lower fiber web,
Example 2 (area shrinkage 20%) was obtained in the same manner as Example 1 except that the polyester fiber / core-sheath fiber = 7/3 was mixed.

(Comparative product 1: Fiber assembly containing no heat-fusible fiber) As a raw material for the upper and lower fiber webs,
Comparative product 1 was obtained in the same manner as in the case of product 1 except that only polyester fiber of 1.5 denier and 51 mm was used.

(Comparative product 2: Fiber aggregate consisting only of heat-fusible fibers) As a raw material for the upper and lower fiber webs, polypropylene / polyethylene core-sheath fibers 3 denier, 5
Comparative product 2 was obtained in the same manner as the product 1 except that only 1 mm was used.

The following evaluations were carried out for each of the above-mentioned practical product and comparative product. 1. Hair-collecting properties 10 human hairs, about 10 cm long, are sprinkled so that they do not overlap closely, and the sponge of 7 × 11 cm is pasted and fixed with the above-mentioned products and comparative products, and then reciprocated 3 times.
A sensory evaluation was conducted on the ease with which hair was taken off and the difficulty in removing it.

The criteria for sensory evaluation are as follows. ⊚: 10 to 8 hairs are reliably taken, and it is difficult to remove the taken hair. ◯: 10 to 8 hairs are surely taken, but the taken ones may fall. Δ: 7 to 5 hairs are taken, but the taken hair is easy to remove. X: Do not take more than 5 hairs.

2. Surface fluff resistance 15 × 15 cm on each of the above-mentioned products and comparative products, diameter 7c
Apply a load of 500 g to a disc-shaped sponge (Oe Co., Ltd., Kindori Cleaner No.5005) with a thickness of 2 cm and make a circle with a radius of 4 cm at the center of the disc-shaped sponge every 1 second / revolution. The number of fibers adhering to the disc-shaped sponge after 10 rounds was determined by visually observing rotation and inversion.

The evaluation criteria for judgment are as follows. ⊚: No fibers are attached. ◯: Almost no fibers are attached. Δ: Fibers are attached to the outer circumference of the disc.

The results of the above evaluations are shown in Table 1 below.

[0062]

[Table 1]

As is clear from Table 1, the products 1 and 2 which are the bulky sheets of the present invention have good hair-collecting properties and fluff-pulling resistance. In contrast,
Comparative products 1 and 2 have insufficient hair-collecting properties or anti-fluffing properties, and in particular, comparative product 2 has poor hair-collecting properties and is unsuitable as a cleaning article. Is.

The bulky sheet of the present invention is not limited to the above-mentioned embodiment, and its use is not limited to the cleaning sheet, and it may be used as a cleaning material, a surface material in sanitary goods, a cushion material, or the like. The drug to be carried is appropriately selected depending on the application.

[0065]

The bulky sheet of the present invention is excellent not only in its ability to adsorb and retain dirt such as fine dust,
Capable of catching large dirt such as bread crumbs using the unevenness of the non-woven fabric and the effect of entanglement of the highly flexible non-woven fiber, it has excellent ability to collect cotton dust, lint, hair and the like, and also excellent fluff resistance. Moreover, since it has good flexibility and texture, it is suitable as a cleaning sheet or the like.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state in which a mesh sheet and a fibrous web are superposed on each other at an early stage of manufacturing the bulky sheet according to the first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state in which a mesh sheet and a fibrous web are superposed on each other at an initial stage of manufacturing the bulky sheet according to the second embodiment of the present invention.

FIG. 3 is a sectional view of an example of a finished product of the bulky sheet shown in FIG.

4 is a sectional view of an example of a finished product of the bulky sheet shown in FIG.

FIG. 5 is a schematic view showing an entire manufacturing apparatus preferably used when manufacturing the bulky sheet shown in FIG.

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

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

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

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

[Explanation of symbols]

 10 Bulkiness sheet 11 (13, 14) Reticulated sheet 12 Fiber assembly (or fiber web) 12A Convex part 12B Concave part

Claims (4)

[Claims] 1. A non-woven fabric-like fiber aggregate formed by entanglement of fibers is integrated on one side or both sides of a mesh sheet together with the entanglement of the constituent fibers in the mesh sheet as well. The plurality of uneven portions are formed on the surface of the fiber assembly, and the constituent fibers of the fiber assembly that are entangled on at least one surface of the mesh sheet include a heat-fusible fiber. A bulky sheet characterized by. 2. The bulkiness according to claim 1, wherein the constituent fibers of the fiber assembly entangled on at least one surface of the reticulated sheet contain 1 to 99% by weight of a heat-fusible fiber. Sex sheet. 3. The medicine is added to the fiber assembly in an amount of 0.1 to 500.
The bulky sheet according to claim 1 or 2, which is supported by weight% (based on the weight of the fiber aggregate). 4. The mesh sheet is a heat-shrinkable sheet, and the fiber assembly has a large number of uneven portions formed on its surface by heat shrinkage of the mesh sheet by heat treatment. The bulky sheet according to claim 1, 2 or 3.