Fabric (woven – knitted – or nonwoven textile or cloth – etc.) – Nonwoven fabric – Including strand or fiber material which is a monofilament...
Patent
1998-01-20
2000-07-18
Pezzuto, Helen L.
Fabric (woven, knitted, or nonwoven textile or cloth, etc.)
Nonwoven fabric
Including strand or fiber material which is a monofilament...
442362, 442364, 442365, 442401, 442417, D04H 314
Patent
active
060907304
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention relates to a filament non-woven fabric. In particular, the invention relates to a non-woven fabric comprising thermoplastic conjugated filaments comprising at least one low melting point or low softening point resin selected from olefin binary copolymer or olefin terpolymer as a first component and a crystalline thermoplastic resin as a second component and an absorbent article using the above mentioned filament non-woven fabric.
BACKGROUND TECHNOLOGY
A spun bond non-woven fabric as a typical example of a filament non-woven fabric is produced by a method wherein a group of filaments discharged from a spinneret for melt spinning are drawn and stretched by introducing into an air sucker etc., opened, and accumulated on a collecting conveyor to be formed into a filament web; and then the filaments are entangled or thermally adhered by appropriate means. Therefore, since this non-woven fabric comprises filaments, namely, continuous fibers, it is more excellent in the mechanical properties such as tensile strength etc. as compared with a staple fiber non-woven fabric comprising short fibers. Moreover, since this non-woven fabric is produced by opening and accumulating the filaments obtained directly by melt spinning, it can be rationally produced as compared with non-woven fabrics obtained by opening and accumulating staple fibers by a dry method or a wet method. In recent years, the production of such non-woven fabrics has radically increased.
In particular, a non-woven fabric that comprises conjugated filaments comprising a low melting point resin or a low softening point resin comprising olefin binary copolymer or terpolymer as one component and a crystalline thermoplastic resin as another component is not only advantageous as a filament non-woven fabric from the above mentioned viewpoint, but also is excellent in thermal adhesion, and thus it is easily processable. In a case where the non-woven fabric having excellent properties can be produced, the demand for such non-woven fabric is expected to radically increase.
Moreover, conventionally, absorbent articles such as disposable diapers like paper diapers, sanitary napkins and the like have structures so that body fluids such as urine, blood or the like are absorbed and leakage is prevented. Although the specific structure of such absorbent articles varies between respective embodiments, however, such an absorbent article comprises at least an absorptive core layer for absorbing and retaining body fluids such as urine, blood or the like; a liquid permeable top sheet produced from, for example, a non-woven fabric and located at the side of the front surface of the core layer (the side contacting with the user's skin); and a liquid impermeable back sheet located at the back side of the core layer that prevents the absorbed body fluids from leaking outside. Moreover, in general, in absorbent articles such as disposable diapers like paper diapers or sanitary napkins and the like, in addition to the back sheet, water repellent side sheets are provided at both sides of the absorbent articles so as to prevent absorbed liquid such as body fluids from leaking when the absorbent articles are displaced from the desired place due to the user's physical motion or when a user lays down on his/her side. (In the case of disposable diapers, since the water repellent side sheets often are provided with gathers, they are called a side gather or a leg cuff etc. In the case of disposable diapers, such side sheets are provided in a place that holds the joints of the thigh or the circumference of the thigh.) In addition, in the disposable diapers, a water-repellent round sheet comprising a non-woven fabric or the like also is provided at the skin side of the portion covering the abdomen or the portion covering the upper buttock located opposite to the abdomen, in order to prevent the liquids such as body fluids or the like, which are absorbed by the absorbent articles and which leak to the abdomen portion or the upper buttock portion, from leakin
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1997 International Search Report for PCT/JP97/02165.
Fujiwara Toshikatsu
Sugawara Shigeyuki
Terakawa Taiju
Chisso Corporation
Pezzuto Helen L.
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