Abstract:
The present invention provides a prepreg excellent in self adhesiveness to a honeycomb core, low in porosity when used as skin panels, excellent in surface smoothness (low in surface porosity) when used as skin panels, and good in tackiness and drapability, and also provides a honeycomb sandwich panel high in skin panel peel strength and excellent in impact resistance and hot water resistance, and a resin composition for a fiber reinforced composite material to allow the above. The present invention has the following constitution. A resin composition for a fiber reinforced composite material comprising the components ÄAÜ, ÄBÜ and ÄCÜ are essential wherein the modulus of storage rigidity G' measured by parallel plates having vibration frequency of 0.5 Hz during elevation of temperature from 50 DEG C at 1.5 DEG C/min is in a range of 5 to 200 Pa in an entire range of 70 DEG C to 100 DEG C. A resin composition for a fiber reinforced composite material comprising the components ÄAÜ , ÄBÜ and ÄCÜ are essential, wherein the minimum modulus of storage rigidity G'min and the maximum modulus of storage rigidity G'max at 70 DEG C to 100 DEG C measured by parallel plates having vibration frequency of 0.5 Hz during elevation of temperature from 50 DEG C at 1.5 DEG C/min, satisfy the following relation: A resin composition for a fiber reinforced composite material comprising the components ÄAÜ, ÄBÜ and ÄCÜ are essential, wherein the thixotropy index is in a range of 2.5 to 40, the resin viscosity at 80 DEG C measured by parallel plates having vibration frequency of 0.5 Hz during elevation of temperature from 50 DEG C at 1.5 DEG C/min is in a range of 100 to 1000 poises, and the minimum value of resin viscosity during heating is 30 to 400 poises. A resin composition for a fiber reinforced composite material comprising the components ÄAÜ, ÄBÜ and ÄCÜ are essential, wherein solid rubber and fine silica particles are contained as component ÄCÜ by 1 to 10 wt%, respectively, based on the total weight of the resin composition. The fiber reinforced composite material using the prepreg of the present invention can be used widely for airplanes, automobiles and other industrial applications, particularly as structural materials of airplanes, because of its excellent mechanical properties.
Abstract:
A prepreg precursor comprising a carbon fiber woven fabric having applied to the fabric from 0.5 to 10 wt% of a stabilizer material for rendering stable the structural form of the fabric. Prepregs can then be produced using the woven fabric. The undesired settlement, into the prepreg of matrix resin with which the fabric is impregnated in order to produce the prepreg and which is originally present on the surface of the woven fabric, is thus prevented. Hence, compared with a prepreg prepared using conventional woven fabric, a prepreg prepared by using the woven fabric of the invention can hold its tackiness for a long time and can be used to produce a fiber reinforced composite material excellent in smoothness without being devoid of the resin on the surface.
Abstract:
A prepreg precursor comprising a carbon fiber woven fabric having applied to the fabric from 0.5 to 10 wt% of a stabilizer material for rendering stable the structural form of the fabric. Prepregs can then be produced using the woven fabric. The undesired settlement, into the prepreg of matrix resin with which the fabric is impregnated in order to produce the prepreg and which is originally present on the surface of the woven fabric, is thus prevented. Hence, compared with a prepreg prepared using conventional woven fabric, a prepreg prepared by using the woven fabric of the invention can hold its tackiness for a long time and can be used to produce a fiber reinforced composite material excellent in smoothness without being devoid of the resin on the surface.
Abstract:
A prepreg precursor comprising a carbon fiber woven fabric having applied to the fabric from 0.5 to 10 wt% of a stabilizer material for rendering stable the structural form of the fabric. Prepregs can then be produced using the woven fabric. The undesired settlement, into the prepreg of matrix resin with which the fabric is impregnated in order to produce the prepreg and which is originally present on the surface of the woven fabric, is thus prevented. Hence, compared with a prepreg prepared using conventional woven fabric, a prepreg prepared by using the woven fabric of the invention can hold its tackiness for a long time and can be used to produce a fiber reinforced composite material excellent in smoothness without being devoid of the resin on the surface.
Abstract:
The present invention provides a prepreg excellent in self adhesiveness to a honeycomb core, low in porosity when used as skin panels, excellent in surface smoothness (low in surface porosity) when used as skin panels, and good in tackiness and drapability, and also provides a honeycomb sandwich panel high in skin panel peel strength and excellent in impact resistance and hot water resistance, and a resin composition for a fiber reinforced composite material to allow the above. The present invention has the following constitution. A resin composition for a fiber reinforced composite material comprising the components ÄAÜ, ÄBÜ and ÄCÜ are essential wherein the modulus of storage rigidity G' measured by parallel plates having vibration frequency of 0.5 Hz during elevation of temperature from 50 DEG C at 1.5 DEG C/min is in a range of 5 to 200 Pa in an entire range of 70 DEG C to 100 DEG C. A resin composition for a fiber reinforced composite material comprising the components ÄAÜ , ÄBÜ and ÄCÜ are essential, wherein the minimum modulus of storage rigidity G'min and the maximum modulus of storage rigidity G'max at 70 DEG C to 100 DEG C measured by parallel plates having vibration frequency of 0.5 Hz during elevation of temperature from 50 DEG C at 1.5 DEG C/min, satisfy the following relation: A resin composition for a fiber reinforced composite material comprising the components ÄAÜ, ÄBÜ and ÄCÜ are essential, wherein the thixotropy index is in a range of 2.5 to 40, the resin viscosity at 80 DEG C measured by parallel plates having vibration frequency of 0.5 Hz during elevation of temperature from 50 DEG C at 1.5 DEG C/min is in a range of 100 to 1000 poises, and the minimum value of resin viscosity during heating is 30 to 400 poises. A resin composition for a fiber reinforced composite material comprising the components ÄAÜ, ÄBÜ and ÄCÜ are essential, wherein solid rubber and fine silica particles are contained as component ÄCÜ by 1 to 10 wt%, respectively, based on the total weight of the resin composition. The fiber reinforced composite material using the prepreg of the present invention can be used widely for airplanes, automobiles and other industrial applications, particularly as structural materials of airplanes, because of its excellent mechanical properties.
Abstract:
The present invention provides a prepreg excellent in self adhesiveness to a honeycomb core, low in porosity when used as skin panels, excellent in surface smoothness (low in surface porosity) when used as skin panels, and good in tackiness and drapability, and also provides a honeycomb sandwich panel high in skin panel peel strength and excellent in impact resistance and hot water resistance, and a resin composition for a fiber reinforced composite material to allow the above. The present invention has the following constitution. A resin composition for a fiber reinforced composite material comprising the components ÄAÜ, ÄBÜ and ÄCÜ are essential wherein the modulus of storage rigidity G' measured by parallel plates having vibration frequency of 0.5 Hz during elevation of temperature from 50 DEG C at 1.5 DEG C/min is in a range of 5 to 200 Pa in an entire range of 70 DEG C to 100 DEG C. A resin composition for a fiber reinforced composite material comprising the components ÄAÜ , ÄBÜ and ÄCÜ are essential, wherein the minimum modulus of storage rigidity G'min and the maximum modulus of storage rigidity G'max at 70 DEG C to 100 DEG C measured by parallel plates having vibration frequency of 0.5 Hz during elevation of temperature from 50 DEG C at 1.5 DEG C/min, satisfy the following relation: A resin composition for a fiber reinforced composite material comprising the components ÄAÜ, ÄBÜ and ÄCÜ are essential, wherein the thixotropy index is in a range of 2.5 to 40, the resin viscosity at 80 DEG C measured by parallel plates having vibration frequency of 0.5 Hz during elevation of temperature from 50 DEG C at 1.5 DEG C/min is in a range of 100 to 1000 poises, and the minimum value of resin viscosity during heating is 30 to 400 poises. A resin composition for a fiber reinforced composite material comprising the components ÄAÜ, ÄBÜ and ÄCÜ are essential, wherein solid rubber and fine silica particles are contained as component ÄCÜ by 1 to 10 wt%, respectively, based on the total weight of the resin composition. The fiber reinforced composite material using the prepreg of the present invention can be used widely for airplanes, automobiles and other industrial applications, particularly as structural materials of airplanes, because of its excellent mechanical properties.
Abstract:
A prepreg fabric at least comprising [A] a reinforcing fabric, [B] a thermosetting resin or a thermosetting resin composition and [C] fine resin particles, which is characterized by having a cover factor of 95 % or above; and a sandwich panel characterized by comprising skin panels made from the prepreg fabric and [D] a honeycomb core. The prepreg fabric is little changed in the tack as prepreg after the lapse of time, has suitable drape properties (flexibility) and exhibits excellent self-bondability to ahoneycomb core when used as the skin panel of a honeycomb sandwich panel, and the honeycomb sandwich panel is advantageous in that the skin panels made of a product of curing of the prepreg fabric have a lowered inner porosity and that the skin panels have few holes and depressions on their surfaces and are thus excellent in surface smoothness.
Abstract:
The present invention provides a prepreg excellent in self adhesiveness to a honeycomb core, low in porosity when used as skin panels, excellent in surface smoothness (low in surface porosity) when used as skin panels, and good in tackiness and drapability, and also provides a honeycomb sandwich panel high in skin panel peel strength and excellent in impact resistance and hot water resistance, and a resin composition for a fiber reinforced composite material to allow the above. The present invention has the following constitution. A resin composition for a fiber reinforced composite material comprising the components ÄAÜ, ÄBÜ and ÄCÜ are essential wherein the modulus of storage rigidity G' measured by parallel plates having vibration frequency of 0.5 Hz during elevation of temperature from 50 DEG C at 1.5 DEG C/min is in a range of 5 to 200 Pa in an entire range of 70 DEG C to 100 DEG C. A resin composition for a fiber reinforced composite material comprising the components ÄAÜ , ÄBÜ and ÄCÜ are essential, wherein the minimum modulus of storage rigidity G'min and the maximum modulus of storage rigidity G'max at 70 DEG C to 100 DEG C measured by parallel plates having vibration frequency of 0.5 Hz during elevation of temperature from 50 DEG C at 1.5 DEG C/min, satisfy the following relation: A resin composition for a fiber reinforced composite material comprising the components ÄAÜ, ÄBÜ and ÄCÜ are essential, wherein the thixotropy index is in a range of 2.5 to 40, the resin viscosity at 80 DEG C measured by parallel plates having vibration frequency of 0.5 Hz during elevation of temperature from 50 DEG C at 1.5 DEG C/min is in a range of 100 to 1000 poises, and the minimum value of resin viscosity during heating is 30 to 400 poises. A resin composition for a fiber reinforced composite material comprising the components ÄAÜ, ÄBÜ and ÄCÜ are essential, wherein solid rubber and fine silica particles are contained as component ÄCÜ by 1 to 10 wt%, respectively, based on the total weight of the resin composition. The fiber reinforced composite material using the prepreg of the present invention can be used widely for airplanes, automobiles and other industrial applications, particularly as structural materials of airplanes, because of its excellent mechanical properties.