▎ 摘　　要

NOVELTY - Highly flexible polymer optical fiber comprises core layer, skin layer and coating layer. The skin layer is sleeved on the outer ring of the core layer, the coating layer is sleeved on the outer ring of the skin layer, the material of the core layer is polycarbonate, the material of the skin layer is polyethylene terephthalate, and the material of the coating layer is graphene. The preparation of the highly flexible polymer optical fiber includes drying the core material and skin material separately. The processed core layer material and skin layer material are put into the two screws of a twin-screw melt spinning machine and extrude them under vacuum conditions through a spinneret to make crude products. The obtained crude product is water-cooled, and then drawn by a drafting roller to make a polymer optical fiber. USE - Highly flexible polymer optical fiber. ADVANTAGE - The polymer optical fiber have excellent toughness, and also has high efficiency in the preform-stretching method and good protection capabilities and greatly improves the service life. DETAILED DESCRIPTION - Highly flexible polymer optical fiber comprises core layer, skin layer and coating layer. The skin layer is sleeved on the outer ring of the core layer, the coating layer is sleeved on the outer ring of the skin layer, the material of the core layer is polycarbonate, the material of the skin layer is polyethylene terephthalate, and the material of the coating layer is graphene. The preparation of the highly flexible polymer optical fiber includes drying the core material and skin material separately. The processed core layer material and skin layer material are put into the two screws of a twin-screw melt spinning machine and extrude them under vacuum conditions through a spinneret to make crude products. The obtained crude product is water-cooled, and then drawn by a drafting roller to make a polymer optical fiber. The obtained polymer optical fiber is passed along the wire wheel on the transmission frame, and then passed through the rollers on the soaking mechanism in the top box. The top plate is driven to move downward. The bottom plate (13) is set directly under the top plate (10), a limit rod (12). The limit sliding sleeve (11) is installed on the inner wall of the top box (2), so that the polymer optical fiber on the bottom plate (13) moves down to the immersion cavity (16) in the bottom box (3), and soaked in graphene solution. The cold source enters the condensation zone in the solidification box through the cold source inlet pipe. The forming tube is cooled down in the condensation zone. The polymer optical fiber in the condensation zone is cooled and molded, so that a protective film is attached to the surface of the polymer optical fiber. An INDEPENDENT CLAIM is included for a method for preparing a polymer optical fiber with high flexibility, which involves: (A) drying the core material and skin material separately; (B) putting the processed core layer material and skin layer material into the two screws of a twin-screw melt spinning machine and extrude them under vacuum conditions through a spinneret to make crude products; (C) water cooling obtained crude product, and then drawing by a drafting roller to make a polymer optical fiber; (D) passing the obtained polymer optical fiber along the wire wheel on the transmission frame; (E) passing through the rollers on the soaking mechanism in the top box in turn, and passing through the forming tube on the curing box by controlling the extension of the hydraulic cylinder; (F) entering cold source in condensation zone in the solidification box through the cold source inlet pipe and cooling down the forming tube in the condensation zone, so as to reduce the temperature of the condensation zone; and (G) cooling and molding polymer optical fiber inside, so that a protective film is attached to the surface of the polymer optical fiber. DESCRIPTION OF DRAWING(S) - The drawing shows schematic view of highly flexible polymer optical fiber. Top box (2) Bottom box (3) Top plate (10) Limit sliding sleeve (11) Limit rod (12) Bottom plate (13) Immersion cavity (16)