Flexible tube
A polyvinyl chloride-based flexible tube with controlled polymerization and plasticizer content addresses substance elution and mechanical integrity issues, ensuring stable flow rates and durability for roller pumps and related applications.
JP7751889B2Active Publication Date: 2025-10-09TOYOX CO LTD
Patent Information
- Application Number
- JP2023083672
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2023-05-22
- Publication Date
- 2025-10-09
- Estimated Expiration
- 2043-05-22
Smart Images
Figure 0007751889000001
Abstract
To provide a flexible pipe that is suitably used in a roller pump or the like for transporting fluid, and in which a flow rate does not decrease even when used for a long period of time and a risk of water leakage due to breakage is reduced.SOLUTION: A flexible pipe is formed by molding a resin composition made of polyvinyl chloride with an average degree of polymerization of 1,500 to 2,500 into a cylindrical shape. The resin composition contains 70 to 100 pts.wt. of a plasticizer for every 100 pts.wt. of polyvinyl chloride. The resin composition is immersed in heptane as a solvent at 25°C for one hour, and the evaporation residue of a leaching solution is 1,000 μg / ml or less. The plasticizer has a weight average molecular weight of 3,500 to 5,500. The flexible pipe can be used in a peristaltic part of a roller pump.SELECTED DRAWING: None
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Citation Information
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