Stock material or miscellaneous articles – Pile or nap type surface or component – Particular shape or structure of pile
Patent
1995-09-21
1997-12-09
Morris, Terrel
Stock material or miscellaneous articles
Pile or nap type surface or component
Particular shape or structure of pile
428100, 4283066, 4283084, 4283099, 24442, 24448, B32B 302, B32B 306, B32B 514, A44B 104
Patent
active
056958455
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a fastener and, in particular, relates to a face-like fastener for attaching a skin sheet material to a foamed molding body.
BACKGROUND OF THE ART
In seats used in a car and an aircraft, chairs used in a house and an office, an upholstery foam lining, an interior finish for a floor and a wall, and the like, a face-like fastener is used for attaching a skin sheet material to a cushion material. Upon this, the skin sheet material can be detached from the cushion material. In general, such a face-like fastener comprises one member having many pile threads with hook- or mushroom-shaped expanded portions and another member having many loops for locking with those expanded portions.
FIG. 1 shows a partial cross-sectional view of a fastener according to the art wherein one member of the face-like fastener is provided on a cushion material surface. The face-like fastener 1 has pile threads 4 entangled with a woven-fabric 3, and each pile thread 4 has a mushroom-shaped pileus 5 on its leading end. A cushion material 2 is provided on the back side of the woven-fabric 3. The cushion material 2 is molded in one with the woven-fabric 3 by foam resin such as polyurethane.
Another member of the fastener is provided on a skin sheet material. Many loops are formed on this member and are locked or hooked with the pilei, and the skin sheet material can be attached to the cushion material thereby. However, when an external force acts between the cushion material and the skin sheet material attached thereto, the pile threads 4 will be taken out from the woven-fabric 3. Thus, the pile threads and the fabric should be fixed to resist such an external force in order to perform a good fastening without the pile threads being taken out therefrom. Accordingly, in a fastener of the art, as seen in FIG. 2(a), a backing 6 made of acryl resin is provided on the back side of the woven-fabric 13.
We now consider another fastener which uses a knitted-fabric as shown in FIG.2(b) other than a fastener formed by entangling the pile threads with the woven-fabric as shown in FIG. 1 or FIG. 2(a). In a fastener using a knitted-fabric, ends of a string of the knitted-fabric is protrude from the surface of the knitted-fabric, and pile threads 14 are formed by such ends and a pileus 15 is formed on each tip thereof. The pile threads 14 of the fastener comprising of such a knitted-fabric are not taken out therefrom by the external force, however, when such a force acts to the pile threads 14, the pile threads 14 are pulled, and the knitted-fabric cloth and the pile threads are slid thereby. In order to avoid this, a backing 16 is provided on the back side of the knitted-fabric by the resin processing as mentioned in the woven-fabric case.
As described in the above, while a cushion material is molded by foam resin such as polyurethane, it is contracted by a few percent (e.g. about 1.5% in urethane foam ) in a series of steps of injecting the stock solution of the resin onto the back side of the woven- or the knitted-fabric, foaming and then setting. Meanwhile, the back side of the woven- or the knitted-fabric can not follow such a contraction phenomenon because the backing provided on the back side is made by the resin processing. Thus, the front side is waved so that if a skin sheet material is attached to the face-like fastener having the wariness the skin sheet material is also waved, and the exterior view and the quality of a seat and the like are considerably spoiled thereby.
Moreover, such a waviness formed on a skin sheet of a seat or a chair makes the exterior view of the seat worse and makes a person who sits thereon uncomfortable.
In use of a knitted-fabric, its cloth is itself stretchable and so even if the backing is made by the resin processing, the contraction phenomenon of the foam resin may be reduced. However, in a fastener using a cloth of the knitted-fabric, its structure and its production process are complicated, and its cost is higher and its use is considerably limited thereby
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Goto Fumio
Ogawa Taro
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