JPH0435165Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial field of application) The present invention relates to synthetic resin laminates that are widely used as roofing materials for buildings. This invention relates to synthetic resin laminates with improved mechanical properties.

(Prior art) Two layers of synthetic resin, such as polyvinyl chloride resin, are extruded from an extrusion molding machine, and a core material made of thin threads made of glass wool or the like is continuously fed into the middle of each layer. This core material is interposed between the synthetic resin layers in a sandwich-like pattern, and then hot press molded into, for example, a wavy shape as required.The synthetic resin laminate material exhibits high impact resistance due to the above-mentioned core material. Therefore, it has been widely used as a roofing material for buildings.

(Problem to be solved by the invention) However, in the above synthetic resin laminate material, the intermediate core material is simply a net-like structure of thin threads, so the core material is sent between the synthetic resin layers. If a relatively large tensile force is applied unevenly when feeding or forming into a wave shape, the mesh will become distorted.
This kind of thing can often occur during the operation of an extrusion molding machine, and if the core material with such deformed eyes is interposed as an intermediate layer of a synthetic resin laminate, the impact resistance that was originally planned to be In addition, if the synthetic resin laminate material is translucent, the core material with deformed eyes will deteriorate its aesthetic appearance and damage its commercial value. .

On the other hand, in the case of a core material made of thin threads knitted into a net shape as described above, the warp and weft threads are often tied at the intersection of the two in order to maintain the shape of the mesh, and in this case, the knotted part is Since it is extremely bulky compared to other parts, a synthetic resin laminate with such a core material inevitably has irregularities on its outer surface. In addition, good adhesion between the core material and the synthetic resin layer may not be ensured, and in this case, the impact resistance of the synthetic resin laminate may be extremely low despite the presence of the core material. Become.

Therefore, if a large number of thin threads are arranged in parallel or used as a core material without knitting thin warp and weft threads, there will be no bulky knots in the core material, and the above-mentioned unevenness on the outer surface of the synthetic resin laminate will disappear.
In addition, good adhesion between the core material and the synthetic resin layer is ensured. However, in the actual manufacturing process of synthetic resin laminated materials, it is technically difficult to arrange many thin threads in parallel or to continuously feed them as a core material between the synthetic resin layers without weaving the warp and weft threads. . Furthermore, even if this were possible, the problem of misalignment between warp and weft threads would still remain as in the case described above.

The present invention was developed in view of the above problems, and its purpose is to provide impact resistance, etc. with almost no unevenness on the surface by interposing a core material that does not cause disordered yarn arrangement or deformation. An object of the present invention is to provide a synthetic resin laminate material with excellent mechanical properties.

(Means for Solving the Problems) In order to achieve the above object, the synthetic resin laminated material of the present invention is made by laminating synthetic resin layers on both sides of a core material in which yarn is pasted in a thin film-like layer. It is characterized by

(Function) According to the present invention, since a thin film-like layer of thread is pasted as a core material and sandwiched between transparent synthetic resin layers, even when the threads are pasted in parallel, Even if the warp and weft threads are attached in a net-like manner, the tensile force generated when the core material is fed between the synthetic resin layers or when it is formed into a wavy shape creates a thin film-like structure. As long as the layers are not deformed, the mutual spacing of the threads and the shape of the stitches or squares will be reliably maintained.

(Example 1) Figures 1 and 2 are an exploded perspective view and a plan view showing an example of the core material used in the present invention, and this core material A
In this case, warp yarns 11 and weft yarns 12 are simply overlapped at the crossing portions, but are not knitted and are attached to a film-like thin layer 20.

Although bundles of glass fibers can be suitably used for the warp yarns 11 and the weft yarns 12, tip strands or the like can also be used. If a bundle of glass fibers is used, it can be deformed into a flat shape and attached to the thin layer 20, so its bulk can be reduced to a negligible level, and synthetic resin layers can be laminated on both sides of such a core material A. As a result, a synthetic resin laminate with no irregularities on the surface is obtained.

The thin layer 20 is made of PVC with a wall thickness of about 0.1 to 0.2 mm,
In addition to thermoplastic synthetic resin films such as acrylic,
A film made by impregnating a mount such as Japanese paper, kraft paper, or linter paper with a thermoplastic synthetic resin emulsion can be used.

20 thin layers of the thermoplastic synthetic resin film described above.
In order to attach the warp yarns 11 and the weft yarns 12 to this, it is preferable to apply a binder to the thermoplastic synthetic resin film and then attach the warp yarns 11 and the weft yarns 12 thereon.

Such a core material A is continuously fed between two extruded synthetic resin layers from an extrusion molding machine to be interposed between these layers, and then pressure-molded and cured by a hot press or roll method. As shown in FIG. 3, a core material A consisting of warp yarns 11, weft yarns 12, and thin layers 20 is used as an intermediate layer, and synthetic resin layers 3 are placed on both sides of the core material A.
The synthetic resin laminate material of the present invention in which 0.0, 40 is laminated is manufactured. The synthetic resin layers 30, 40 may be transparent. In this case, the synthetic resin layers 30, 40 are preferably made to have a thickness of 0.6 to 0.5 mm when the synthetic resin laminate is used as a roofing material such as a flat plate or a corrugated plate.
If the synthetic resin laminate is to be made into a corrugated sheet, it may be formed into a predetermined corrugated shape during the above-mentioned compression molding.

Next, when using a mount impregnated with a thermoplastic synthetic resin emulsion as the thin layer 20 of the core material A,
The warp yarns 11 and the weft yarns 12 can be easily attached to the mount due to the adhesive force of the emulsion without using a separate binder. In general, it can be said that paper has poorer plasticity than synthetic resin film, so if a mount is used as the thin layer 20 as described above, the warp 11
There is an advantage that the shape of the square formed by the weft threads 12 and the weft threads 12 is reliably maintained. Furthermore, when a mount is impregnated with a synthetic resin emulsion as described above, the mount itself often exhibits translucency, so it can be used without any problem even when obtaining a translucent synthetic resin laminate.

Figure 4 shows transparent synthetic resin layers 30, 40 on both sides of a core material A, which is made up of two thin layers 20, 20 sandwiching the warp 11 and the weft 12 in a sandwich pattern.
This shows a synthetic resin laminate made of laminated materials. In this case as well, the same thing as explained in FIG. 3 can be said.

(Example 2) FIG. 5 is an exploded perspective view showing another example of the core material used in the present invention. This core material A is made by pasting warp yarns 11 and weft yarns 12 into a net shape and pasting them on a thin layer 20. I'm wearing it. The warp threads 11 and the weft threads 12 may be knitted in a wire mesh pattern, tied together at their intersections, or threaded through one thread through the other thread. Other matters are the same as those described in the first embodiment.

In addition, in the present invention, the threads attached to the thin layer are not limited to the warp threads and weft threads as explained in Example 1 and Example 2, but also include a plurality of threads arranged in parallel that extend only in the vertical direction or only in the horizontal direction. It can also be a thread from a book.

(Effects of the invention) The synthetic resin laminated material of the invention has the intermediate core material made by pasting threads into a thin film-like layer.
Regardless of whether the threads are knitted or not, no thread alignment or misalignment occurs during compression molding or the like. Therefore, mechanical properties such as impact resistance are uniformly enhanced, and the appearance does not deteriorate. Furthermore, even if the core material is made by tying the warp and weft threads together at their intersections and pasting them together in a thin layer, the thin layer will not be used as a cushion material during pressure molding, etc., which is done during the manufacturing process of synthetic resin laminates. Therefore, it is possible to obtain a synthetic resin laminate with almost no irregularities on the outer surface. Moreover, in the synthetic resin laminate material of the present invention, the surface of the core material on which the threads are attached is covered with a synthetic resin layer, and the threads are not exposed on the surface, so the threads do not peel off or break. , can maintain excellent mechanical properties over a long period of time.

[Brief explanation of the drawing]

Figure 1 is an exploded perspective view showing an example of the core material used in the present invention, Figure 2 is a plan view of the concentric material, and Figures 3 and 4 are composites of the present invention manufactured using different core materials. FIG. 5 is a partially enlarged sectional view of the resin laminate material, and is an exploded perspective view showing another example of the core material used in the present invention. A... Core material, 11... Warp, 12... Weft, 2
0...Thin layer, 30, 40...Synthetic resin layer.

Claims (1)

[Scope of utility model registration request] A synthetic resin laminated material made by laminating synthetic resin layers on both sides of a core material made of thin film-like layers of yarn.