Medical pipe and preparation method thereof

A technology for pipes and polytetrafluoroethylene, applied in the field of medical devices, can solve problems such as large costs and losses, and achieve the effects of reducing the use accident rate, preventing delamination abnormalities, and improving twist control performance.

Inactive Publication Date: 2020-04-14
ACCUPATH MEDICAL JIAXING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, delamination is difficult to detect until final product testing, and detection of delamination during testing after the tubing has been assembled can result in considerable cost penalty

Method used

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  • Medical pipe and preparation method thereof

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preparation example Construction

[0021] In this embodiment, the preparation method of medical tubing includes the following steps:

[0022] Step S1: firstly etch the PTFE inner layer, fix the etched PTFE inner layer on the mandrel, and immerse the mandrel in the dipping tank with adhesive to make the adhesive The binding agent is coated on the outer surface of the polytetrafluoroethylene inner layer. Wherein, the binder in the dipping tank may be at least one of polyamide, polyimide, polyether block amide (PEBA), and thermoplastic polyurethane (TPU). The solid content of the binder may be 10-20%. The solid content in the present invention refers to the mass percentage of the remaining part of the binder after drying. The role of the adhesive is to better bond the layers of the composite pipe together.

[0023] Step S2: Put the mandrel vertically into an oven, heat and cure the adhesive on the outer surface of the inner layer of polytetrafluoroethylene, and set the curing temperature according to the characterist...

Embodiment 1

[0029] The core rod 1 is a stainless steel rod with a polytetrafluoroethylene coating. The etched polytetrafluoroethylene inner layer is sheathed on the core rod 1, and the core rod 1 is immersed in a dipping tank with an adhesive, so that the adhesive is coated on the outer PTFE inner layer On the surface. Among them, the binder in the dipping tank is polyether block amide (PEBA) with a solid content of 20%. Put the mandrel 1 into an oven vertically to heat and cure the adhesive on the outer surface of the inner layer of polytetrafluoroethylene. The temperature of heat curing is in the range of 100-240°C. A bonding layer is formed on the outer surface of the inner layer. A braiding machine is used to braid braided wires on the bonding layer to form a braided layer; an outer layer is sheathed on the outer part of the braided layer, and a welding machine is used for thermal welding and bonding. The outer layer is made of polyether block amide (PEBA). A sleeve is sleeved on t...

Embodiment 2

[0031] The core rod 1 is a stainless steel rod with a polytetrafluoroethylene coating. The etched PTFE inner layer is sheathed on the core rod 1, and the core rod 1 is immersed in a dip tank with an adhesive, so that the adhesive is coated on the outer PTFE inner layer. On the surface. Among them, the binder in the dipping tank is nylon 6 (PA6) with a solid content of 20%. Put the mandrel 1 into an oven vertically to heat and cure the adhesive on the outer surface of the inner layer of polytetrafluoroethylene. The temperature of heating and curing ranges from 100 to 260°C. A bonding layer is formed on the outer surface of the inner layer. A braiding machine is used to braid braided wires on the bonding layer to form a braided layer; an outer layer is sheathed on the outer part of the braided layer, and a welding machine is used for thermal welding and bonding. The outer layer is made of polyether block amide (Pebax). A sleeve is sleeved on the outer layer and thermally weld...

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Abstract

The invention discloses a medical pipe and a preparation method thereof. The medical pipe comprises a polytetrafluoroethylene inner layer, a braided layer and an outer layer which are sequentially arranged from inside to outside. A bonding layer is arranged between the polytetrafluoroethylene inner layer and the braided layer and/or between the braided layer and the outer layer. According to the medical pipe and the preparation method thereof provided by the invention, the bonding layer is additionally arranged between the layers of the medical pipe, so that abnormal layering between the layers of the medical pipe is effectively prevented, the use accident rate of a medical terminal is reduced, and the torsion control performance of the medical pipe is improved while the flexibility of theoriginal pipe is maintained.

Description

Technical field [0001] The invention relates to the technical field of medical devices, in particular to a medical tube and a preparation method thereof. Background technique [0002] Medical composite pipes are usually composed of multiple layers. Due to the inconsistent materials of each layer and the different bonding properties, the delamination is abnormal. In pipe construction, delamination is a serious failure mode, which has a great impact on product performance. However, the delamination phenomenon is difficult to detect before the final test of the product, and the delamination problem is found during the test after the pipe assembly is completed, which will cause considerable cost loss. Summary of the invention [0003] The purpose of the present invention is to provide a medical tube and a preparation method thereof, which can enhance the adhesion between layers and prevent abnormal delamination between layers. [0004] In order to solve the above-mentioned technical p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32B32B27/12B32B5/02B32B27/00B32B27/06B32B7/12B32B38/08B32B38/16B32B37/00B32B37/12F16L9/14F16L11/08
CPCB32B5/024B32B7/12B32B27/00B32B27/06B32B27/12B32B27/322B32B37/0076B32B37/12B32B37/1284B32B38/08B32B38/164B32B2037/1253B32B2038/0076B32B2307/558B32B2327/18B32B2535/00F16L9/14F16L11/085
Inventor 秦明林李兆敏赵涛张新华阙亦云
Owner ACCUPATH MEDICAL JIAXING CO LTD
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