Abstract: A fibrous component for a vehicle exterior includes a skin layer having a multilayer structure comprising a laminated web including a reinforcing fiber and a binder fiber, the skin layer including pores that absorb sound; a sound absorbing pad layer disposed on an inner side of the skin layer and absorbing sound; and an adhesive layer disposed between the skin layer and the sound absorbing pad layer. The adhesive layer adheres the skin layer and the sound absorbing layer to each other.

Abstract: The present invention relates to a method for manufacturing a highly heat-resistant sound absorbing and insulating material, more specifically to a method including a beating and mixing step, a web forming step, a web stacking step, a needle punching step, a binder impregnating step and a solvent recovering step. The highly heat-resistant sound absorbing and insulating material manufactured by the method according to the present invention may be installed on a location closest to the noise source of an engine or an exhaust system to reduce radiated noise from the engine or the exhaust system, thereby improving quietness inside a vehicle, and may be applied to a location adjacent to a metal part which is at a temperature of 200° C. or greater to exert heat-insulating function, thereby protecting nearby plastic and rubber parts.

Abstract: Disclosed herein is a method for manufacturing a high temperature resistant sound absorbing material for vehicles. In particular, the method includes a beating/blending step, a web forming step, a web laminating step, a needle punching step, a first binder soaking step, a first solvent recovering step, a second binder soaking step, a second solvent recovering step, a second binder surface treating step, a second solvent recovering step, and a molding step. Further, the method of the present invention may include a first binder surface treating step, a first surface solvent recovering step, and a molding step after the first solvent recovering step. In addition, the method of the present invention may further include a third binder soaking step, a third solvent recovering step, a third binder surface treating step, a third surface solvent recovering step, and a molding step after a nonwoven fabric is formed in the needle punching step.

Abstract: A fibrous component for a vehicle exterior includes a skin layer having a multilayer structure comprising a laminated web including a reinforcing fiber and a binder fiber, the skin layer including pores that absorb sound; a sound absorbing pad layer disposed on an inner side of the skin layer and absorbing sound; and an adhesive layer disposed between the skin layer and the sound absorbing pad layer. The adhesive layer adheres the skin layer and the sound absorbing layer to each other.

Abstract: The present invention relates to a method for molding a substantially improved heat-resistant sound absorbing and insulating material, which uses a sound absorbing material containing, based on 100 parts by weight of the sound absorbing material, an amount of about 20-80 parts by weight of a fiber material having a limiting oxygen index (LOI) of about 25% or greater and a heat resistance temperature of about 200° C. or greater and an amount of about 20-80 parts by weight of a thermosetting binder resin having a heat resistance temperature of about 200° C. or greater and is installed on an engine cylinder block and an automotive body panel above a muffler of a vehicle. The method includes: a releasing agent coating step of coating a releasing agent inside a heated die; a heated compression molding step of fixing a shape; and a cold compression step of stabilizing the shape.

Abstract: The present invention relates to a method for molding a highly heat-resistant sound absorbing and insulating material, which uses a sound absorbing material containing 20-80 parts by weight of a fiber material having a limiting oxygen index (LOI) of 25% or greater and a heat resistance temperature of 200° C. or greater and 20-80 parts by weight of a thermosetting binder resin having a heat resistance temperature of 200° C. or greater and is installed on an engine cylinder block and an automotive body panel above a muffler of a vehicle. More specifically, the method includes a releasing agent coating step of coating a releasing agent inside a hot die, a hot compression molding step of fixing a shape, and a cold compression step of stabilizing the shape.

Abstract: A fibrous component for a vehicle exterior includes a skin layer having a multilayer structure comprising a laminated web including a reinforcing fiber and a binder fiber, the skin layer including pores that absorb sound; a sound absorbing pad layer disposed on an inner side of the skin layer and absorbing sound; and an adhesive layer disposed between the skin layer and the sound absorbing pad layer. The adhesive layer adheres the skin layer and the sound absorbing layer to each other.

Abstract: The present invention relates to a method for molding a substantially improved heat-resistant sound absorbing and insulating material, which uses a sound absorbing material containing, based on 100 parts by weight of the sound absorbing material, an amount of about 20-80 parts by weight of a fiber material having a limiting oxygen index (LOI) of about 25% or greater and a heat resistance temperature of about 200° C. or greater and an amount of about 20-80 parts by weight of a thermosetting binder resin having a heat resistance temperature of about 200° C. or greater and is installed on an engine cylinder block and an automotive body panel above a muffler of a vehicle. The method includes: a releasing agent coating step of coating a releasing agent inside a heated die; a heated compression molding step of fixing a shape; and a cold compression step of stabilizing the shape.

Abstract: The present invention relates to a method for manufacturing a substantially improved heat-resistant sound absorbing and insulating material. method includes: beating and mixing a fiber material comprising a heat-resistant fiber; forming a web from the beaten and mixed fiber material; stacking the formed web; forming a nonwoven fabric by needle punching as moving a needle up and down through the stacked web; forming a binder-impregnated nonwoven fabric by immersing the nonwoven fabric in a binder solution; and removing a solvent from the binder-impregnated nonwoven fabric. The substantially improved heat-resistant sound absorbing and insulating material manufactured by the method according to the present invention may be installed on a location closest to the noise source of an engine or an exhaust system to reduce radiated noise from the engine or the exhaust system, thereby improving quietness inside a vehicle, and may be applied to a location adjacent to a metal part which is at a temperature of 200° C.

Abstract: The present invention relates to a method for manufacturing a highly heat-resistant sound absorbing and insulating material, more specifically to a method including a beating and mixing step, a web forming step, a web stacking step, a needle punching step, a binder impregnating step and a solvent recovering step. The highly heat-resistant sound absorbing and insulating material manufactured by the method according to the present invention may be installed on a location closest to the noise source of an engine or an exhaust system to reduce radiated noise from the engine or the exhaust system, thereby improving quietness inside a vehicle, and may be applied to a location adjacent to a metal part which is at a temperature of 200° C. or greater to exert heat-insulating function, thereby protecting nearby plastic and rubber parts.

Abstract: The present invention relates to a method for molding a highly heat-resistant sound absorbing and insulating material, which uses a sound absorbing material containing 20-80 parts by weight of a fiber material having a limiting oxygen index (LOI) of 25% or greater and a heat resistance temperature of 200° C. or greater and 20-80 parts by weight of a thermosetting binder resin having a heat resistance temperature of 200° C. or greater and is installed on an engine cylinder block and an automotive body panel above a muffler of a vehicle. More specifically, the method includes a releasing agent coating step of coating a releasing agent inside a hot die, a hot compression molding step of fixing a shape, and a cold compression step of stabilizing the shape.

Abstract: Disclosed is a highly heat resistant sound absorbing material for a vehicle capable of maintaining a shape even at high temperatures of about 200° C. or above and which satisfies UL 94V-0 flame retardancy. More particularly, the a highly heat resistant sound absorbing material includes a fiber material having a limiting oxygen index (LOI) of at least about 25% and capable of maintaining a shape at a temperature of about 200° C. or above, and a thermosetting binder resin capable of maintaining a shape at a temperature of about 200° C., wherein the fiber material and thermosetting binder resin are provided at a specific proportion.

Abstract: Disclosed is a highly heat resistant sound absorbing material for a vehicle capable of maintaining a shape even at high temperatures of about 200° C. or above and which satisfies UL 94V-0 flame retardancy. More particularly, the a highly heat resistant sound absorbing material includes a fiber material having a limiting oxygen index (LOI) of at least about 25% and capable of maintaining a shape at a temperature of about 200° C. or above, and a thermosetting binder resin capable of maintaining a shape at a temperature of about 200° C., wherein the fiber material and thermosetting binder resin are provided at a specific proportion.

Abstract: Disclosed is an all-optical variable optical attenuator. The all-optical variable optical attenuator includes a nonlinear optical fiber where a pair of long-period gratings is formed in a pre-determined pattern. Alternatively, the variable optical attenuator may include a pair of optical fibers where a long-period grating is formed in each optical fiber in a pre-determined pattern to form a pair of long-period gratings on the whole, and a nonlinear optical fiber fusion-spliced between one ends of the respective optical fibers. The core layer of the nonlinear optical fiber contains semiconductor particles having a size of nanometers, a metallic particle having a size of nanometers, or a rare-earth element.

Abstract: Disclosed is an all-optical variable optical attenuator. The all-optical variable optical attenuator includes a nonlinear optical fiber where a pair of long-period gratings is formed in a pre-determined pattern. Alternatively, the variable optical attenuator may include a pair of optical fibers where a long-period grating is formed in each optical fiber in a pre-determined pattern to form a pair of long-period gratings on the whole, and a nonlinear optical fiber fusion-spliced between one ends of the respective optical fibers. The core layer of the nonlinear optical fiber contains semiconductor particles having a size of nanometers, a metallic particle having a size of nanometers, or a rare-earth element.