Patent ID: 8470114

Claim:
A method of preparing thermoplastics-continuous fiber hybrid composite comprising the following steps of: a) widely and uniformly stretching a bundle of glass fibers; b) heating the stretched glass fibers; c) preparing a thermoplastics-continuous fiber bonding material by binding the heated glass fiber with thermoplastics in a shape of tape; d) preparing a multi-layered thermoplastics-continuous fiber bonding material by folding the bonding material in a shape of zigzag; and e) pressing the multi-layered thermoplastics-continuous fiber bonding material, wherein the step a) is carried out by uniformly stretching the bundle of glass fibers in a shape of sheet using a guide bar and a convex bar, wherein the guide bar has a structure of which a central portion is flat and both ends are convex, and plays a role of preventing the bundle of the glass fibers from being separated and guiding it to the convex bar, and the convex bar satisfies the following Equations 1 to 3 and plays a role of uniformly stretching the bundle of glass fibers in a shape of sheet, L + ( π 2 - ϕ ) ⁢ R = ( x - x 0 ) 2 + L 2 + ( π 2 - ϕ ) ⁢ r [ Equation ⁢ ⁢ 1 ] tan ⁢ ⁢ ϕ = S H + R sin ⁢ ⁢ ϕ [ Equation ⁢ ⁢ 2 ] cos ⁢ ⁢ ϕ = H + R sin ⁢ ⁢ ϕ L + R tan ⁢ ⁢ ϕ [ Equation ⁢ ⁢ 3 ] wherein R is a maximum radius of the convex bar, r is a minimum radius of the convex bar, H is a height from a horizontal line passing through the center of the guide bar to a center of the block bar, L is a distance from a contacting point of the glass fiber and the guide bar to a contacting point of the glass fiber and a center of the convex bar, S is a distance from a vertical line passing through the center of the convex bar to the guide bar, x is a horizontal distance from an axial symmetry plane of the convex bar to the glass fiber, x 0 is a horizontal distance from a longitudinal symmetry plane of the guide bar to the glass fiber, and φ is an angle joining the vertical line passing through the center of the convex bar and a tangent line of the convex bar.