Preparation method of balloon of dilatation balloon catheter

• Main Authors: LIN GAOQIANG, LI BOYAN
• Format: Patent
• Language: Chinese; English
• Published: 29.04.2022
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The invention provides a balloon preparation method of an expansion balloon catheter, which comprises the following steps: mixing pebax granules, TPU granules and nanoscale barium sulfate to obtain blended granules; injecting the blended granules into a material blank through a high-pressure injection molding machine to obtain the material blank; the material blank is placed in a drying oven, constant-temperature preheating is conducted, the material blank is preheated to be crystallized, and the crystallinity is 70%-80%; putting the preheated material blank into a mold, and pressing to obtain a blastocyst for preparing the balloon; the blastocyst is fixed in an upper clamp and a lower clamp, the clamps are placed in a drying oven, the blastocyst is fixed and preheated, stretching is conducted at the speed of 10-20 mm/min, stretching is stopped when the stretching ratio is 5-6 times, the two clamps continue to clamp the blastocyst, natural cooling is conducted, and the blastocyst with the orientation degree b