Sandwich-type composite with a prepreg coating comprising a carrier layer and a functional layer bonded by a thermoplastic nonwoven fabric and method for producing the same

Abstract

The subject of the application is a sandwich composite with a preimpregnated coating having a preimpregnation (1) consisting of a carrier layer (1.1) and a functional layer (1.2) connected by a thermoplastic material (1.3) in the form of a non-woven fabric. The preimpregnation (1) consists of a carrier layer (1.1) in the form of electrocorundum, into which a thermoplastic material (1.3) is embedded, wherein the carrier layer (1.1) is connected to a functional layer (1.2) consisting of metal powder or semimetal powder or carbide powder or mineral powder, into which a thermoplastic material (1.3) is embedded, while on the side of the carrier layer (1.1) on the preimpregnation (1) there are layers of glass fabrics (5), a core material (6) and layers of glass fabrics (5) filled and connected with a polyester resin. The subject of the application is also a method of manufacturing a composite with a pre-impregnated coating having a pre-impregnate (1) consisting of a carrier layer (1.1) and a functional layer (1.2) connected by a thermoplastic non-woven fabric, which consists in the fact that first, in the first stage, a carrier layer (1.1) in the form of electrocorundum is laid on the lower plate (2) of the thermal transfer press, onto which a thermoplastic material (1.3) in the form of a non-woven fabric is applied, which is welded by pressing the upper heating plate (3). Then, in the second stage, a functional layer (1.2) in the form of metal powder or semi-metal powder or carbide powder or mineral powder is laid on the lower plate (2) of the thermal transfer press, onto which a thermoplastic material (1.3) in the form of a non-woven fabric is applied, which is welded by pressing the upper heating plate (3). In the third stage, the product created in the first stage is placed on the lower plate (2) of the thermal transfer press in such a way that it is in contact with it on the side of the carrier layer (1.1), and then the product created in the second stage is placed on the product created in the first stage in such a way that the products are in contact with each other on the sides with the thermoplastic material (1.1).3), and then a thermoplastic material (1.3) in the form of a non-woven fabric is applied to the product formed in the second stage and the whole is welded by pressing the upper heating plate (3), obtaining a pre-impregnation (1). Then, in a further process, the pre-impregnation (1) is placed on the forming tool (4) in such a way that the thermoplastic material (1.3) contacts the forming tool (4), after which layers of glass fabrics (5) are placed on the pre-impregnation (1), on which the core material (6) and layers of glass fabrics (5), a separating fabric (7) and a perforated foil (8) and a distribution mesh for infusion (9) are applied, while a spiral tube (10.1) for introducing the resin and a spiral tube or a microporous tube (10.1) are placed on the forming tool (4) in the vicinity of the layers.2) for air removal, then the forming tool (4) is connected with the vacuum foil (12) covering the layers using a sealing tape (11) and pressure is created inside the space between the forming tool (4) and the vacuum foil (12) and polyester resin is introduced to fill the space.