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Mold and method for ring hoop tension tests of small polymer pipes

A technology of hoop stretching and testing molds, which is applied in the field of medical devices and can solve problems such as difficult to apply, few, and difficult stretching tests

Pending Publication Date: 2016-05-11
深圳信立泰医疗器械股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The small polymer tubing used in the biodegradable stent material is cut into a ring or a ring-like sample. Also due to the size problem, it is difficult to set it on the equipment shown in the ASTMD2290 standard for tensile testing.
[0004] CN1865906A discloses a method for testing the hoop tensile properties of large pipes used in the field of construction industry. Due to the particularity of the structure and performance of the small pipes of the polymer support, the two fields are far apart. The test method disclosed in CN1865906A and its mold are both Difficult to apply to the present invention
[0005] To sum up, for the current research on the tensile test of the hoop performance of the small polymer tubing of the biodegradable stent, there are no relevant standards and standards for the hoop performance tensile test of the small polymer tubing of the biodegradable stent at home and abroad. In the industry, there are few effective research reports on the hoop performance tensile test of small polymer tubing of biodegradable stents

Method used

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  • Mold and method for ring hoop tension tests of small polymer pipes
  • Mold and method for ring hoop tension tests of small polymer pipes
  • Mold and method for ring hoop tension tests of small polymer pipes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0111] refer to figure 1 As shown, a mold for the tensile test of the hoop performance of small polymer pipes includes: a stressed bar 101, a main body device 102, and a connecting part 103; wherein the stressed bar 101 is installed on one side of the main body device 102, and can be Pass through the inside of the small polymer pipe along the axial direction of the small polymer pipe; the connecting parts 103 are arranged on the left and right sides of the main device 102 and are used to connect the mold and the stretching module. The force bar 101 is a regular hexagonal prism with a bottom side length of 0.70 mm and a length of 10 mm. It is made of high-strength steel with a roughness of 0.05 and a distance of 0.50 mm from the top of the main device 102. Among them, the force bar 101 uses two ends Both ends are detachable, and both ends are fixed on the main device 102 with sheaths; the left and right sides of the main device 102 are cubes, with a length of 18.00 mm, a width ...

Embodiment 2

[0114] refer to figure 2 As shown, a mold for the tensile test of the hoop performance of small polymer pipes includes: a stressed bar 101, a main body device 102, and a connecting part 103; wherein the stressed bar 101 is installed on one side of the main body device 102, and can be The small polymer tube passes through the lumen of the small polymer tube along the axial direction; the connecting parts 103 are arranged on the left and right sides of the main device 102 and are used to connect the mold and the stretching module. The main device 102 is further subdivided into a distal fixing part 104 and a proximal top, and the distance between the force bar 101 and the proximal top of the main device 102 is 0.50 mm. The force bar 101 is a cylinder with a diameter of 1.00mm and a length of 10mm, made of No. 45 steel with a roughness of 0.008; the main device 102 (102-1 and 102-2), the connecting parts 103 (103-1 and 103- 2), the fixing parts 104 (104-1 and 104-2) are composed...

Embodiment 3

[0117] refer to Figure 6 As shown, a mold for the tensile test of the hoop performance of small polymer pipes includes: a stressed bar 101, a main body device 102, and a connecting part 103; wherein the stressed bar 101 is installed on one side of the main body device 102, and can be The small polymer tube passes through the lumen of the small polymer tube along the axial direction; the connecting parts 103 are arranged on the left and right sides of the main device 102 and are used to connect the mold and the stretching module. The main device 102 is further subdivided into a distal fixing part 104 and a proximal top, and the distance between the force bar 101 and the proximal top of the main device 102 is 0.50 mm. The force bar 101 is a half cylinder with a diameter of 1.00mm and a length of 10mm, made of No. 45 steel with a roughness of 0.8; the main device 102 is composed of two symmetrical parts, wherein the main device 102 is a cuboid with a length of 50.00mm , with a ...

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Abstract

The invention provides a mold and a method for ring hoop tension tests of small polymer pipes for biodegradable stents and aim to overcome the defects of technologies for the ring hoop tension tests of the small polymer pipes for the biodegradable stents. The mold and the method have the advantages that the ring hoop tension tests can be carried out on the small polymer pipes of the biodegradable stents under the condition that the original performance of the small polymer pipes is kept, accordingly, accurate test data can be acquired, and the test efficiency can be greatly improved.

Description

technical field [0001] The invention belongs to the field of medical devices, in particular to a mold for hoop tensile testing of small polymer pipes and a testing method thereof. Background technique [0002] In recent years, due to the improvement of living standards and changes in lifestyle, the number of patients with coronary heart disease has increased year by year. Vascular stenting has become the main treatment method due to its advantages of less bleeding, less trauma, fewer complications, safety and reliability, and quick postoperative recovery. Stents have also evolved from the first generation of stainless steel bare metal stents to the fourth generation of biodegradable stents. Degradable polymer materials are gradually being used in the fourth-generation biodegradable stents because they have certain mechanical properties and can be biodegraded and absorbed by the human body. However, due to their own properties, it is still difficult to achieve mechanical prop...

Claims

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Application Information

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IPC IPC(8): G01N3/08G01N3/04
Inventor 陈泳袁新袁玲
Owner 深圳信立泰医疗器械股份有限公司
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