Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Reexamination Certificate
2000-08-04
2001-06-05
Sells, James (Department: 1734)
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
C156S073300, C156S290000, C156S308400
Reexamination Certificate
active
06241835
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a cleaning product and a process for producing the same. More particularly, this invention relates to a cleaning product which is excellent in a dust collecting performance and is suitable for a disposable product, and a process for producing the same.
2. Description of the Prior Art
As a cleaning product, sheets made of fibers have been used. Among them, disposable products which are made of non-woven fabrics and used being attached to a cleaning tool such as a cleaning mop have been generally on the market since they can be used simply and conveniently.
Japanese Patent Laid-Open H9-149873 discloses a method of manufacturing a disposable wiper having brushing portions. In this wiper, a base sheet and tows of fibers oriented in one direction (filament layer) are stacked, in which the base sheet and the filament layer are bonded at a plurality of bonding lines extending over the entire length of the sheet in a direction perpendicular to the direction described above and, further, only the filament layer is cut continuously and linearly over the entire length of the sheet between adjacent bonding lines, to form the brushing portions from the filament layer. The wiper having the brushing portions is excellent in a dust collecting effect and can collect various kinds of dusts ranging from fine dusts to relatively large crumbs. Further, since the tows are used, the wiper can be produced at small cost.
However, when the brushing portions are formed by cutting the filament layer, it is actually difficult to cut only the filament layer while leaving the base sheet as it is. If the cutting size is not exact, the base sheet is cut together with the filament layer to make the wiper in pieces. Accordingly, the manufacturing step is extremely troublesome. Further, the entire strength of the wiper is not enough.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a cleaning product excellent in a dust collecting effect, which can be manufactured conveniently at small cost.
The foregoing object of the present invention can be attained in a cleaning product comprising a base sheet and at least one layer comprising filaments or split yarns oriented in one direction, said base sheet and said layer being stacked and bonded together at a plurality of bonding lines extending in a direction intersecting with said one direction, said base sheet being cut together with said layer at a plurality of cutting portions aligned intermittently in said intersecting direction, thereby forming a plurality of brushing portions with said filaments or split yarns positioned between the bonding lines and the cutting portions in said one direction.
Further, the cleaning product of the present invention can be obtained by a process for producing a cleaning product comprising the steps of:
feeding a base sheet and at least one layer continuously and stacking said layer to said base sheet, wherein said layer comprises filaments or split yarns oriented in one direction;
bonding said base sheet and said layer at a plurality of bonding lines in a direction intersecting with said one direction to obtain a sheet material;
cutting said sheet material at a plurality of cutting portions aligned intermittently in said intersecting direction, thereby forming a plurality of brushing portions with said filaments or split yarns positioned between the bonding lines and the cutting portions; and
separating said sheet material to obtain a cleaning product.
REFERENCES:
patent: 2522691 (1950-09-01), Podolak
patent: 4018646 (1977-04-01), Ruffo et al.
patent: 5429854 (1995-07-01), Currie et al.
patent: 5525397 (1996-06-01), Shizuno et al.
Abe Kouzou
Fujiwara Masatoshi
Kenmochi Yasuhiko
Tanaka Yoshinori
Darby & Darby
Sells James
Uni-Charm Corporation
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