JP2000245671A - Cleaning sheet and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the functions of capturing and retaining properties of dust, such as entangling away and enveloping of the dust by imparting crimps to the many brush-like parts formed on the surface of a base material sheet. SOLUTION: The cleaning sheet 1 is formed by fixing the brush-like parts 3 having the crimps at weld fines 5 onto the base material sheet 2. The brush- like parts 3 are disposed by cutting long fiber filaments having the crimps 4. The brush-like parts 3 of such cleaning sheet 1 have the crimps 4 and, therefore, the fibers are easily movable in both of a transverse direction and a longitudinal direction and the cleaning sheet added and improved with the various functions, such as, entangling away and enveloping of the dust, is obtained. In addition, the fibers have the crimps, by which the adjacent fibers are interfered with each other between the fibers and the state of the fibers spreading at the front ends of the fibers is obtained. The great improvement in the functionability, such as taking in of the dust into the brush-like parts 3 and the entangling and holding of the dust by the brushes is admitted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning sheet having a plurality of brush-like portions on a sheet surface. More specifically, the present invention provides a cleaning sheet having a large number of brush-like portions on the sheet surface, by providing crimps to the brush-like portions, so that various functions for capturing and holding dust can be achieved. It relates to an added and improved cleaning sheet.

[0002]

2. Description of the Related Art Conventionally, as a cleaning tool, there has been known a cleaning mop using a bundle of thread-shaped mops or a film formed by tearing and bundling a film or the like. However, the thread-like mop yarn has high rigidity and does not have a function of entanglement of dust or wrapping of entangled dust. Moreover, since the fiber is straight when the film is torn, it is possible to adsorb dirt on the surface of the fiber, but it is difficult to exhibit a function of entanglement or entrapping dirt.

Further, there is known a cleaning sheet using a nonwoven fabric which is used by being attached to a cleaning tool similar to a cleaning mop or the like. Because these can be used very easily for business and home use and can be disposable,
Widely available on the market. For example, Japanese Patent No. 276569
No. 0 publication, on one or both sides of a mesh sheet, a nonwoven fabric aggregate formed by fiber entanglement of a fiber web,
A cleaning sheet integrated in an entangled state is disclosed. Further, Japanese Patent Application Laid-Open No.
JP-A-135798 discloses a sheet-like base material and a plurality of heat-welding long fibers joined on one side and extending in one direction, the long fibers being intermittently arranged in the longitudinal direction. Discloses a wiping tool joined to the sheet-like base material by a welding wire. Further, Japanese Patent Application Laid-Open No. Hei 9-149873, which is an earlier application filed by the present inventors, discloses a disposable wiping tool in which a brush-like portion is provided on at least one side of a base material sheet.

[0004] However, the above-mentioned Patent No. 2765690
In the cleaning sheet disclosed in Japanese Patent Application Publication No. H06-157, the fiber aggregate is integrated with the sheet in an entangled state, so that the fiber has no degree of freedom, and large trash can be taken into the fiber or entangled. It was impossible to keep dust and hair in the fibers. Further, Japanese Patent Application Laid-Open No. 9-135
No. 798 discloses a wiping tool disclosed in Japanese Patent No. 2765.
Compared with the cleaning sheet described in Japanese Patent Publication No. 690, the fibers have a higher degree of freedom, so that the wiping property of dust is improved, and the holding power for dust taken in the fibers is also improved. However, since both ends of the fiber are joined, the degree of freedom of the fiber is not yet sufficient, and the fiber has not yet had satisfactory wiping properties in terms of entanglement of the dust with the fiber and the amount of the dust taken into the fiber. Further, Japanese Patent Application Laid-Open
The wiping tool described in JP-A-149873 which has a brush-like portion in a base sheet can absorb dust on the brush-like portion and catch the dust. Since the entanglement of dust and garbage is weak and the aggregate of fibers does not have a three-dimensional volume, there is a disadvantage that there is little space for dust to enter.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention solves the above-mentioned problems of the prior art and fully adds a function of catching and holding dust, such as entanglement or wrapping of dust. An object of the present invention is to provide an improved cleaning sheet.

[0006]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies and as a result, by making the brush-like portion crimp,
Conventionally, two-dimensional movement of fibers is possible, and three-dimensional movement is possible. In addition, interference between the fibers causes the fiber tip to be spread, and the ability to catch and retain dust such as entanglement and wrapping. The inventors have found that functions can be added and improved, and have completed the present invention.

That is, the present invention provides a cleaning sheet having a large number of brush-like portions on at least one surface of a base sheet, wherein the brush-like portions have crimps. A cleaning sheet characterized in that the number of crimps per inch (2.54 cm) is 5 to 25 peaks; a cleaning sheet containing an oil agent; a base sheet A step of intermittently joining long fiber filaments having crimps on the surface in the flow direction of the fibers, and a step of cutting the long fiber filaments between the joining lines. It is a manufacturing method.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a cleaning sheet according to the present invention will be described with reference to the accompanying drawings. 1 and 2 show plan views of the cleaning sheet of the present invention. FIG. 3 shows a cross-sectional view along the line A-A ′ in FIG. FIGS. 4 and 5 are plan views showing the cleaning sheet of FIGS. 1 and 2 before the brush-like portion is provided.

As shown in these drawings, in the cleaning sheet 1 of the present invention, a brush-like portion 3 having a crimp is fixed on a base sheet 2 by a welding wire 5. The brush-like portion 3 is provided by cutting a long fiber filament 7 having a crimp 4. The brush-like portion 3 may be provided only on one surface of the base material sheet 2 or may be provided on both surfaces of the base material sheet as shown in FIG. The base sheet 1 of the cleaning sheet of the present invention is not particularly limited, but in the case of a floor cleaning sheet using a tool such as a mop, the length of the long fiber filament in the flow direction is approximately 2
It is preferable that the length is 5 to 80 cm and the length in the lateral direction is approximately 20 to 30 cm.

The interval between the welding wires 5 is preferably about 5 to 60 mm. If it is less than 5 mm, the length of the brush is short, and the capturing and retaining properties of dust are inferior. On the other hand, if it exceeds 60 mm, the length of the brush-like portion is too long, and the hair falls asleep, and the function of the brush cannot be sufficiently performed. The shape of the welding wire 5 is not particularly limited as long as it extends in a direction crossing the flow direction of the long fiber filament, and may be other than the shapes shown in FIGS. 1 and 2. For the welding, it is preferable to use a means such as a heat welding seal or an ultrasonic welding seal, and particularly, a heat welding seal is preferable. Further, the fibers can be fixed by an adhesive, sewing, or the like.

The brush-like portion 3 may be provided on the whole of the base material sheet 2, but as shown in FIGS. A region 9 without parts can also be provided. In the case where there is a region 9 where no brush-like portion is provided, refer to Japanese Patent Application Laid-Open No.
As shown in FIG. 1 of the publication, by folding back this region 9, the cleaning sheet 1 of the present invention can be easily attached to a mop handle or the like. Although not shown,
To make it easier to attach and remove the mop to the handle etc.
A notch or the like can be provided in the hole.

The substrate sheet 2 used for the cleaning sheet 1 of the present invention is not particularly limited, but any material having a strength that can be used, such as a nonwoven fabric, a resin film, or a cloth containing synthetic fibers, can be used. Such a thing can also be used.
Among them, a spunbonded nonwoven fabric made of a composite fiber of polyethylene and polyester is preferable in terms of strength.

The long fiber filament 7 having a crimp 4 used for manufacturing the cleaning sheet 1 of the present invention is not particularly limited, but is generally manufactured from polyethylene, polypropylene, nylon, polyester, rayon, or the like. A long fiber bundle called a tow is used. Among them, it is preferable to use a fiber composed of a composite fiber of polyethylene and polyester. The crimp 4 is not particularly limited, and can be formed by mechanical crimping, thermal crimping, or the like, and various forms of crimping can be used, from two-dimensional to three-dimensional. The number of crimps is 1 inch (2.54 c
Preferably, 5 to 25 peaks per m). If the number of crimps is less than 5, the function improvement by crimping, that is, the function of wiping off dust and the function of retaining the dusts will be hindered. If the number of crimps exceeds 25, the processing characteristics in the production of the fiber will be deteriorated, and the utility will be poor.

An example of manufacturing the cleaning sheet of the present invention will be described below. As shown in FIGS. 4 and 5, the long fiber filament 7 having the crimp 4 is opened, and is roughly 100 mm to 20 mm.
After expanding to a width of 0 mm, it is joined to the base sheet 2. Joining is performed by welding the long fiber filaments 7 to the base sheet 2 by the welding lines 5 extending in a direction crossing the flow direction of the fibers of the long fiber filaments 7. Next, the long fiber filament 7 is cut along the cutting line 6 between the welding lines to form the brush-like portion 3 having the crimps 4. The length of the raised portion 8 of the brush-like portion 3 is preferably 3 to 30 mm. When the thickness is less than 3 mm, the length of the brush-like portion is short, and the dust-trapping property and the holding property are inferior. If it exceeds 30 mm, the length of the brush-like portion is too long, and the hair falls asleep, and the function of the brush cannot be sufficiently performed.

Since the brush-like portion 3 of the cleaning sheet 1 of the present invention has the crimps 4, the brush 4 naturally occurs only by cutting along the cutting line 6 without providing a step of raising the fluff. . However, by various fluffing processes,
The raising 4 may be further fluffed. In this case, a method of blowing air from the air nozzle to the cleaning sheet, a method of applying a mechanical force to the cleaning sheet, or the like can be used. By making the brush-like portion 3 fluffy in this way, the dust collecting effect can be enhanced, and the aesthetic appearance is also excellent. In addition, the cleaning sheet 1 of the present invention includes mineral oils such as paraffin, synthetic oils of polyolefins, oil agents such as silicone oils, etc., in order to improve the trapping and retaining properties of dust and the finish of the cleaning surface after wiping. It is preferable to contain a surfactant or the like. Such an oil agent can be contained by a method such as spray coating, transfer coating, or impregnation.

In the cleaning sheet of the present invention thus manufactured, since the brush-like portion has crimps, the fibers can easily move in both the horizontal direction and the vertical direction (the fiber direction), and various properties can be obtained. The functions such as entanglement and wrapping of garbage are added and improved. In addition, since the fibers have crimps, adjacent fibers interfere with each other, and a state in which the fibers are spread at the tip of the fibers is obtained. For this reason, a great improvement in functionality such as taking in dust in the brush-like portion and holding the dust in the brush can be seen, and the apparent number of fluff on the surface of the sheet substrate increases, thereby improving bulkiness and cushioning property. .

[0017]

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples. (Example 1) The number of crimps has 5 crimps per inch,
The tow of long fiber filaments having a core-sheath structure of polyethylene and polyester (denier per filament is 3 deniers, total 75,000 deniers),
After expanding to a width of about 130 mm, a spunbonded nonwoven fabric made of polyethylene and polyester (weighing 20 g / m ² ,
210 mm width). Joining uses a heat seal,
The filaments were adhered to each other by welding lines having a spacing of 20 mm extending in a direction crossing the fiber direction of the long fiber filaments, and the long fiber filaments were cut between the welding lines to form brush-like portions. The apparent length of the brushed part is about 10m
m. The sheet having the brush-like portion thus formed was cut into a length of about 300 mm to produce a cleaning sheet.

(Example 2) A cleaning sheet was manufactured in the same manner as in Example 1 except that the number of crimps of the tow was set to 15 per inch.

Example 3 A cleaning sheet was manufactured in the same manner as in Example 2, except that the apparent length of the brush-like portion was raised to about 5 mm.

Example 4 A cleaning sheet was manufactured in the same manner as in Example 1 except that the number of crimps of the tow was 25 peaks per inch.

Comparative Example 1 A cleaning sheet was manufactured in the same manner as in Example 1 except that the long fiber filaments had no crimp.

Comparative Example 2 A cleaning sheet was manufactured in the same manner as in Example 3 except that the long fiber filament was not crimped.

Comparative Example 3 Short polyester fiber (1.5
(Denier, 51 mm), a cleaning sheet was manufactured from a spunlace nonwoven fabric (weighing 50 g / m ² ) made relatively coarsely.

Test Example 1 Examples 1-4 and Comparative Examples 1
Dust wiping property, bread wiping property, hair wiping property, dust preservation property and brushed appearance of each cleaning sheet manufactured in 3 were evaluated based on the following evaluation methods.

(Dust wiping property) JI as dust for evaluation
After spraying 1.5g of 7 kinds of S test dust (Kanto loam, fine granules) on the test flooring, attach the laminated sheet to the cleaning holder and wipe it off, and evaluate based on the following four-step evaluation criteria. Done. ◎: Very good wiping property was shown. ：: Excellent wiping property was shown. Δ: The amount that can be wiped is small, but it can be used. ×: hardly wiped off, lacking practicality

(Bread crumb wiping property) As bread crumbs for evaluation, 0.5 g of commercially available bread crumbs (1-2 mm) was sprayed on a test flooring, and the laminated sheet was attached to a cleaning holder and wiped off. The evaluation was performed using the evaluation criteria for dust wiping properties described above.

(Wipeability of Hair) As test hair, 10 test human hairs (15 to 20 cm) were sprinkled on a test flooring, and the laminated sheet was attached to a cleaning holder and wiped off, and the above-described dust wiping was performed. The evaluation was performed using the evaluation criteria of the retrievability.

(Dust Retention) After wiping the three kinds of test dust shown in the wiping test method, the sheet is shaken lightly to shake off the dust, and the state of the dropped dust and the dust remaining on the sheet is observed. The evaluation was performed in the following three stages. ：: Almost remained on the sheet, showing excellent retention. Δ: There is some dust that falls, but it can be used. X: A considerable amount was shaken off and lacked practicality.

(Brushed Appearance) Ten test samples were shown, and from the viewpoint of dust wiping performance, the appearance was evaluated in the following three stages, and the item with the most opinion was evaluated as the brushed appearance. ○: It seems that trash can be wiped out as it is seen. Δ: I do not know whether I can remove trash. X: It is unlikely that garbage will be removed. Table 1 shows the results of these evaluations.

[0030]

Table 1----------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------ 12 13 4 12 3 ----------------------------------------------------------------------------------------------------------------- −−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−− • −−−−−−−−−−−−−−−−− ， ・ ，）） imimpartmented on… (Mm) 10 10 5 10 10 5 − −−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−− Dust wiping properties ○ ○ ○ ○ ○ △ △ Bread dust wiping ○ ◎ ○ ◎ × × × Hair wiping ○ ○ ○ ○ ◎ △ △ △ Dust retention ○ ○ ○ ○ × × △ Brushed appearance ○ ○ ○ ○ △ × − − −−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−− -

As is clear from the results shown in Table 1,
In the cleaning sheets of Examples 1 to 4, excellent results were obtained in all of the evaluation items, but Comparative Examples 1 and 2 manufactured using long fiber filaments without crimping and no brush-like portion were provided. In Comparative Example 3, the evaluation was extremely low as compared with Examples 1 to 3.

[0032]

According to the present invention, there is provided a cleaning sheet which is excellent in trapping and retaining properties of various kinds of dust and has a good appearance.

[Brief description of the drawings]

FIG. 1 is a plan view showing a cleaning sheet of the present invention.

FIG. 2 is a plan view showing a cleaning sheet of the present invention.

FIG. 3 is a sectional view taken along lines A-A 'in FIG.

FIG. 4 is a plan view showing a state before cutting the long fiber filament of the cleaning sheet of the present invention.

FIG. 5 is a plan view showing a state before cutting the long fiber filament of the cleaning sheet of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cleaning sheet 2 Base sheet 3 Brush-like part 4 Crimp 5 Welding line 6 Cutting line 7 Long fiber filament 8 Raised 9 Area

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Masatoshi Fujiwara 1531-7 Wadahama Takasuka, Toyohama-cho, Mitoyo-gun, Kagawa Prefecture F-term in Unicharm Corporation Technical Center (Reference) 3B074 AA02 AA07 AA08 AB01 AC03 4L047 AA14 AA21 AA28 AB03 BA05 CB10

Claims (4)

[Claims] 1. A cleaning sheet having a plurality of brush-like portions on at least one surface of a base sheet, wherein the brush-like portions have crimps. 2. The cleaning sheet according to claim 1, wherein the number of crimps per inch (2.54 cm) is 5 to 25. 3. The cleaning sheet according to claim 1, further comprising an oil agent. 4. A method comprising: intermittently joining long fiber filaments having crimps on the surface of a base sheet in a flow direction of the fibers; and cutting the long fiber filaments between the joining lines. A method for producing a cleaning sheet, comprising: