Method for winding filament and pressure vessel manufactured thereby

A filament winding method comprising:

• forming a first pattern layer by winding a fiber reinforcement composite material on an outer circumferential surface of a liner;
• forming a first composite layer by winding the fiber reinforcement composite material on an upper surface of the first pattern layer to form a second pattern layer;
• and
• forming a second composite layer by forming a first pattern layer of the second composite layer on an upper surface of the first composite layer and forming a second pattern layer of the second composite layer on an upper surface of the first pattern layer,
• wherein the first pattern layer is a hoop pattern layer formed by winding the fiber reinforcement composite material in a circumferential direction of the liner, and
• wherein a plurality of the first composite layer and the second composite layer are repeatedly formed such that a total number of composite layers satisfies;
• C
• N
• ⁢
• ≤
• 5
• ,
• wherein CN denotes the total number of the composite layers, and
• wherein the second pattern layer in said forming the first composite layer by winding the fiber reinforcement composite material on the upper surface of the first pattern layer to form the second pattern layer is formed as a tube helical pattern layer by winding the fiber reinforcement composite material on the upper surface of the first pattern layer and satisfies
• N
• ⁢
• 1
• >
• N
• ⁢
• 2
• ,
• wherein N1 denotes the number of hoop pattern layers formed on an upper surface of the liner and N2 denotes the number of tube helical pattern layers formed on an upper surface of the hoop pattern layer.