JPH0315300Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention relates to a composite sheet that can be used as an exterior material or constituent material for chairs, car seats, bedding products, clothing, medical supplies, etc.

(Prior Art) An example of the conventional art is Japanese Utility Model Application Publication No. 54-25101.

(Problems to be solved by the invention) The purpose of the invention is to provide excellent breathability and unevenness effect.
Another object of the present invention is to provide a composite sheet having a stable laminated structure.

(Means for Solving the Problems) The composite sheet of the present invention has a breathable exterior sheet on the surface layer, and a breathable base sheet layered on the back side of the exterior sheet, the width of which is the width of both sheets. A large number of welding line segments parallel to the direction are welded by a plurality of parallel joining lines arranged in a dotted line shape in the longitudinal direction of both sheets at minute intervals, and each joining line connects both sheets to each other. Each of the parallel tube sections has a configuration in which a band made of breathable synthetic resin foam is wrapped in a compressed state.

(Function) An exterior sheet and a base sheet, each of which has air permeability, are connected by a plurality of parallel joining lines in which a large number of welding line segments parallel to the width direction of both sheets are arranged in a dotted line shape at minute intervals. A plurality of cylindrical portions are welded and partitioned by the respective joining lines, and a plurality of cylindrical portions are formed on both sheets, and a band of breathable synthetic resin foam is compressed and wrapped in each of the cylindrical portions to form a composite. To ensure air permeability and flexibility of the entire sheet, impart an uneven effect to the composite sheet, and improve the form stability of the composite sheet.

(Example) Next, an example of the present invention will be described with reference to the drawings.

The composite sheet F includes an exterior sheet 1 constituting the surface layer of the composite sheet F, a base sheet 2 layered on the back side of the exterior sheet 1, and an exterior sheet 1.
and a plurality of strip-like strips 3 sandwiched between the base sheets 2 in a parallel arrangement.
It is composed of 3.

The exterior sheet 1 and the base sheet 2 are made of air-permeable thermofusible sheets such as synthetic fibers, knitted fabrics, nonwoven fabrics, etc. However, both sheets 1 and 2 may each be a multilayer sheet in which a plurality of sheets are layered.

The band 3 is made by slitting a sheet of synthetic resin foam with excellent air permeability and compressive elasticity recovery properties to a predetermined width along the longitudinal direction, such as a reticulated polyurethane foam having a reticulated structure formed by bursting of bubbles. It is formed by However, the widths of each band 3 may be the same or different.

The exterior sheet 1 and base sheet 2 have a plurality of welding line segments 4a parallel to the width direction of both sheets 1 and 2 arranged in a dotted line shape at minute intervals in the longitudinal direction of both sheets 1 and 2. parallel joining lines 4~
4, and each of the cylindrical portions 5 to 5 defined in both sheets 1 and 2 by each joining line 4 contains a band 3 in a compressed state.

To explain one embodiment of the method for manufacturing the composite sheet F having the above-described structure, as shown in FIG. The strips 3 are divided into 3 strips, and the strips 3 are run while being arranged in parallel with a slight gap between them, and the exterior sheet 1 is supplied on the upper side of each strip 3, and the base sheet 2 is supplied on the lower side of each strip 3. The exterior sheet 1, each strip 3, and the base sheet 2 are fed in a laminated state and run, and then the rollers are placed facing each other in each gap between the strips 3 and at a speed corresponding to the running speed of the laminate. An ultrasonic wave equipped with a plurality of spur gear-shaped disks 8 that rotate in synchrony and a flat plate-shaped vibrator 9 that vibrates at an ultra-high speed to line-weld objects passing through each disk 8. Both sheets 1 and 2 are welded using a welding device 10. Therefore, both sheets 1,
2 is a dotted line in the longitudinal direction of both sheets 1 and 2, in which a large number of welding line segments 4a are formed at intervals corresponding to the spacing between the tips of the teeth of each disk 8 at the intermediate portion of the gap between each band 3 and at both ears. A cylindrical part 5 is welded by a plurality of parallel joining lines 4 arranged in a shape, and each band 3 is defined between the exterior sheet 1 and the base sheet 2 by each joining line 4. A composite sheet F can be created in which each of the composite sheets F is enclosed in a compressed state.

Next, the operation and effects of the embodiment having the above configuration will be explained.

In this example, the exterior sheet 1 of the surface layer has air permeability.
and a base sheet 12 which is layered on the back side of this exterior sheet 1 and has air permeability, both sheets 1 and 2
A large number of welding line segments 4a parallel to the width direction of the sheets 1 and 2 are welded by a plurality of parallel joining lines 4 arranged in dotted lines in the longitudinal direction of both sheets 1 and 2 at minute intervals, and each joining line 4 Therefore, each of the cylindrical parts 5 formed in parallel on both sheets 1 and 2 contains a band 3 formed in a band-like shape made of breathable synthetic resin foam in a compressed state. .

Therefore, the overall air permeability of the composite sheet F can be improved, and the uneven effect and three-dimensional decorative effect of the composite sheet F can be enhanced by the uneven effect of the weld line 4 and the cylindrical part 6. The band 3 connects each joining line 4
Since the band members 3 are compressed and enclosed between the sheets 1 and 2, the movement and positional shift of each band member 3 is suppressed, and the form stability of the composite sheet F can be improved.

In particular, since each band 3 is made of a synthetic resin foam with excellent air permeability, and both sheets 1 and 2 are joined at dotted joining lines 4, there is no reduction in air permeability due to the joining lines. This has the effect of ensuring air permeability at the joint site and improving the overall air permeability.

Therefore, when this composite sheet F is used for upholstery, car seat exterior materials, sports clothing, bedding materials, etc., it is possible to impart excellent unevenness effects, cushioning performance, and hygienic performance to each product. can.

(Effects of the invention) Since the present invention is configured as described above, it is possible to improve the air permeability and form stability of the composite sheet, and to enhance the decorative effect of the composite sheet, as well as to form a large number of welding lines into dotted lines. Since the two sheets are welded together by the joining lines arranged in the same manner as in FIG.

Furthermore, when two sheets are welded together using a continuous linear welding line, the welded part hardens and the flexibility of the entire sheet is lost, but with the composite sheet of the present invention, the dotted welding line Since both sheets are welded, it is possible to improve the flexibility of the composite sheet and prevent a decrease in flexibility.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a cutaway perspective view of a composite sheet, FIG. 2 is a plan view, and FIG. 3 is a side view schematically showing an embodiment of a composite sheet manufacturing apparatus. be. 1...exterior sheet, 2...base sheet, 3 band body,
4...Joining line, 5...Cylinder part, F...Composite sheet.

Claims (1)

[Scope of utility model registration request] A breathable exterior sheet in the surface layer portion and a breathable base sheet layered on the back side of this exterior sheet are arranged such that a large number of weld lines parallel to the width direction of both sheets are connected at minute intervals to each other. The sheets are welded by a plurality of parallel joining lines arranged in dotted lines in the longitudinal direction of the sheets, and each cylindrical part defined in parallel on both sheets by the joining lines has air permeability. 1. A composite sheet characterized by comprising band-shaped bands made of synthetic resin foam, each wrapped in a compressed state.