JPH0627411Y2 - Reinforced laminated material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a reinforced laminated material in which a sheet layer of thermoplastic polyurethane is reinforced with a reinforced fiber layer.

[Prior art]

Thermoplastic polyurethane has tough elasticity, wear resistance,
Since it has excellent properties such as aging resistance and oil resistance,
Sheet materials made of it are used in many applications such as shoe soles, conveyor belts, and packing.

However, in applications such as shoe soles and conveyor belts that are subjected to frequent repeated bending loads and tensile loads, there is a problem that the thermoplastic polyurethane sheet material is likely to get settled early. As a countermeasure, in Japanese Utility Model Laid-Open No. 60-26841, there is proposed one in which a reinforcing fiber layer such as carbon fiber is interposed between two thermoplastic polyurethane sheet layers.

In order to laminate the reinforcing fiber layer on the thermoplastic polyurethane sheet layer in this way, both layers are firmly adhered and integrated so that the thermoplastic polyurethane sheet layer does not easily peel off due to repeated loading. There is a need. Conventionally, in order to perform such adhesion, the laminate is heat-pressed at a very high temperature and a high pressure so that the thermoplastic polyurethane is melted and penetrated into the reinforcing fiber layer. Was there. However, this bonding method has a problem that energy consumption is very large because high temperature and pressure are applied, an increase in production cost is unavoidable, and the thermoplastic polyurethane is deteriorated.

[Purpose of device]

The object of the present invention is to solve the above-mentioned conventional problems,
The thermoplastic polyurethane sheet layer and the reinforcing fiber layer can be firmly laminated and integrated even at a low pressure, and thermal deterioration of the thermoplastic polyurethane is not caused, and the bending rigidity is improved as compared with the conventional product. It is to provide a reinforced laminated material that can be.

[Constitution of device]

The reinforced laminated material of the present invention which achieves the above object is obtained by laminating a thermoplastic polyurethane sheet layer on both sides of a reinforced fiber layer impregnated with a thermosetting resin, the thermoplastic polyurethane sheet layer being the thermosetting resin. It is characterized in that it is fused with a resin and integrated with the reinforcing fiber layer.

In the present invention, the reinforcing fiber means a fiber having a high reinforcing effect, such as strength and elastic modulus, which are larger than those of general clothing fibers.
For example, carbon fiber, glass fiber and aramid fiber are preferably used.

The reinforcing fiber layer is a layered structure of the above-mentioned reinforcing fibers, and the form of the layer is not particularly limited. As a preferred form, a woven fabric or knitted fabric made of long fibers may be applied. Further, a sheet-like material obtained by aligning long fibers in one direction or intersecting each other, or a non-woven fabric in which short fibers are entangled in a mat shape can be used.

Further, as the thermosetting resin impregnated into the reinforcing fiber layer,
Epoxy resin and unsaturated polyester resin are preferably used.

The reinforced laminated material of the present invention is processed into a laminated and integrated body of the above-mentioned reinforced fiber layer and thermoplastic polyurethane sheet layer. The reinforced fiber layer before the processing is pre-cured with an uncured thermosetting resin. It is impregnated and prepared as a so-called prepreg. Such a prepreg is inserted between two thermoplastic polyurethane sheet layers, and when these layers are stacked and heated and pressed, the thermoplastic polyurethane sheet is changed while the thermosetting resin is being cured. The two layers are fused and integrated.

The heating temperature at the time of performing the above processing may be a temperature required for the thermosetting resin to cure, and the pressing force may be such that the thermosetting resin is applied to the thermoplastic polyurethane sheet layer during heating and curing. The pressure may be such that the contact state can be maintained. Therefore, the heating temperature and the pressurizing force required for this processing do not require the high temperature and the high pressure which are required in the conventional processing operation, and both can be reduced to 1/2 or less of these.

For example, when carbon fiber is used for the reinforcing fiber layer and epoxy resin is used as the thermosetting resin to be impregnated, the temperature may be about 130 ° C. and the pressure may be in the range of about 15 to 20 kg / cm ² . Eliminates the need for high temperatures and pressures as required in processing.

Further, unlike conventional reinforced laminates, the thermoplastic polyurethane sheet itself does not aim for adhesion by melting and penetrating into the reinforcing fiber layer, so the thickness of the thermoplastic polyurethane sheet is It will be relatively thin compared to other things. Further, thermal deterioration of the thermoplastic polyurethane sheet can be avoided.

〔Example〕

FIG. 1 shows a longitudinal section of a reinforced laminated material 10 according to an embodiment of the present invention. Reference numeral 1 is a reinforced fiber layer in which carbon fiber, glass fiber, aramid fiber or the like is formed into a woven fabric, a knitted fabric or a non-woven fabric Reference numeral 2 is a thermoplastic polyurethane sheet layer arranged on each side of the reinforcing fiber layer 1. The reinforcing fiber layer 1 is impregnated with a thermosetting resin 3, and the thermosetting resin 3 is in a state of being fused with the thermoplastic polyurethane sheet layer 2.

In order to process such a reinforced laminated material 10, as described above, a prepreg in which the reinforced fiber layer 1 is impregnated with the uncured thermoplastic resin 3 in advance is prepared, and this prepreg is used as two thermoplastic polyurethane sheets. It may be arranged such that it is sandwiched between the layers 2 and 2 and heated and pressurized. By this heating and pressurizing operation, the thermosetting resin 3 becomes in a state of being firmly fused with the polyurethane resin of the thermoplastic polyurethane sheet layer 2 in the process of progressing curing.

As described above, in the reinforced laminated material 10, the thermosetting resin 3 impregnated into the reinforced fiber layer 1 is fused with the thermoplastic polyurethane sheet layer 2 on the surface layer also serving as an adhesive means, and thus the conventional state is obtained. There is no need to melt the thermoplastic polyurethane sheet itself. Therefore, in order to pressurize and heat the laminated body to integrate it, it is not necessary to use high temperature and high pressure as in the conventional case. Therefore, less energy is consumed, and deterioration of the thermoplastic polyurethane can be reduced.

2 and 3 illustrate the case where the reinforced laminated material 10 is used as an insole of a shoe. In the figure, reference numeral 20 denotes an outsole, which is mainly a shoe sole, and is usually molded from thermoplastic polyurethane of the same material as the sheet layer 2 of the reinforced laminated material 10. The reinforced laminated material 10 is integrated with the main bottom 20 so as to form an insole through fusion bonding or an adhesive.

The above is the case where the reinforced laminated material of the present invention is used as a midsole of a shoe sole, but it can be applied to various applications such as a conveyor belt and packing.

[Effect of device]

As described above, the reinforced laminated material of the present invention uses the reinforced fiber layer impregnated with the thermosetting resin, and when the thermoplastic polyurethane sheet layers are laminated on both sides of the reinforced fiber layer, the thermosetting resin is used as the surface layer. It is designed to be fused and adhered to a sheet layer of plastic polyurethane. Therefore, when processing a reinforced laminated material, it is sufficient to have a temperature necessary for curing the thermosetting resin and a pressure for keeping the thermosetting resin in contact with the thermoplastic polyurethane sheet layer. The high temperature and high pressure as described above are not required, and the energy consumption can be reduced. Further, thermal deterioration of the thermoplastic polyurethane can be avoided.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a reinforced laminated material according to an embodiment of the present invention, FIG. 2 is a plan view illustrating the case where the reinforced laminated material is applied to a shoe sole, and FIG. 3 is III- of FIG. It is a III arrow line view. 1 ... Reinforcing fiber layer, 2 ... Thermoplastic polyurethane sheet layer, 3 ... Thermosetting resin, 10 ... Reinforcing laminated material.

Claims (1)

[Scope of utility model registration request] 1. A thermoplastic polyurethane sheet layer is laminated on both sides of a reinforced fiber layer impregnated with a thermosetting resin, and the thermoplastic polyurethane sheet layer is fused with the thermosetting resin. A reinforced laminated material integrated with the reinforced fiber layer.