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Polymer microcatheter with regular arrangement of two-dimensional sheet-like fillers and preparation method thereof

A flake filler and micro-catheter technology, applied in the field of micro-catheter products, can solve the problems such as the inability to maximize the enhancement effect of the compressive performance and barrier properties of the polymer tube, the limited performance of the polymer micro-catheter, and the inability to be used as an industrialized product, etc. The effect of long service life, easy operation and extended penetration path

Active Publication Date: 2021-06-04
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the extrusion mode of the existing technology, the two-dimensional filler can only form a relatively regular outer wall area and a completely disordered structure in the tube core area, and the effect of enhancing the compressibility and barrier properties of the polymer tube cannot be maximized.
Therefore, the performance of the polymer microcatheter prepared by this technical means is limited, and it cannot be further expanded in the application field, and the increase in cost is relatively limited in performance, and it is easy to cause waste of fillers, and cannot be used as a mature industrial product.

Method used

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  • Polymer microcatheter with regular arrangement of two-dimensional sheet-like fillers and preparation method thereof
  • Polymer microcatheter with regular arrangement of two-dimensional sheet-like fillers and preparation method thereof
  • Polymer microcatheter with regular arrangement of two-dimensional sheet-like fillers and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A method for preparing a polymer microcatheter in which two-dimensional sheet-like fillers are regularly arranged in a microcosm, comprising the following process steps:

[0036] (1) Mix the polyolefin elastomer material grains and the two-dimensional sheet-shaped filler montmorillonite as the raw material of the polymer microcatheter uniformly according to the weight ratio of 1:0.02, and set aside;

[0037] (2) Extrude the mixture obtained in step (1) through a high-performance polymer pipe preparation device with application number 200810045785.9 to obtain a polymer microcatheter in which two-dimensional sheet-like fillers are arranged in a regular microcosmic manner ; Wherein the mandrel and the die rotate in opposite directions at the same speed. The process parameters are as follows: the opening angle of the bell mouth of the sizing sleeve of the cooling and shaping mechanism is 15°, and the length is 13cm. Vacuum sizing and spraying on the outer wall of the pipe ar...

Embodiment 2

[0040] A method for preparing a polymer microcatheter in which two-dimensional sheet-like fillers are regularly arranged in a microcosm, comprising the following process steps:

[0041] (1) Mix the polyurethane pellets and the two-dimensional flake filler graphene as the raw material of the polymer microcatheter uniformly according to the weight ratio of 1:0.03, and set aside;

[0042] (2) Extrude the mixture obtained in step (1) through a high-performance polymer pipe preparation device with application number 200810045785.9 to obtain a polymer microcatheter in which two-dimensional sheet-like fillers are arranged in a regular microcosmic manner ; Wherein the mandrel and the die rotate in opposite directions at the same speed, and the process parameters are as follows: the opening angle of the bell mouth of the sizing sleeve of the cooling and shaping mechanism is 14°, and the length is 13cm. Vacuum sizing and spraying on the outer wall of the pipe, The temperature of the spr...

Embodiment 3

[0045] A method for preparing a polymer microcatheter in which two-dimensional sheet-like fillers are regularly arranged in a microcosm, comprising the following process steps:

[0046] (1) Mix the polyethylene material granules and the two-dimensional flake filler molybdenum disulfide as the raw material of the polymer microcatheter evenly according to the weight ratio of 1:0.2, and set aside;

[0047] (2) Extrude the mixture obtained in step (1) through a high-performance polymer pipe preparation device with application number 200810045785.9 to obtain a polymer microcatheter in which two-dimensional sheet-like fillers are arranged in a regular microcosmic manner ; Wherein the mandrel and the die are rotating in opposite directions at the same speed. The process parameters are as follows: the bell opening angle of the sizing sleeve of the cooling and shaping mechanism is 17°, and the length is 14cm. Vacuum sizing and spraying on the outer wall of the pipe are adopted. The tem...

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Abstract

The present invention provides a polymer microcatheter with regular arrangement of two-dimensional flaky fillers in the microcosm and a preparation method thereof. Mix uniformly according to a certain ratio; (2) extrude the mixture obtained in step (1) through a high-performance polymer pipe preparation device with application number 200810045785.9, and obtain a two-dimensional flaky filler in the microscopic form. Aligned polymeric microcatheters. The polymer microcatheter has regular arrangement of two-dimensional sheet-like fillers in the radial direction, has excellent compression resistance and barrier performance, and has a simple process flow for its preparation method, can be produced continuously, and has industrialization prospects.

Description

technical field [0001] The invention belongs to the technical field of microcatheters, and relates to a polymer microcatheter with regular arrangement of microscopic two-dimensional sheet fillers and a preparation method thereof, in particular to microcatheter products used in the fields of automotive oil circuits, precision instruments, and medical interventional treatments. . Background technique [0002] Polymer microcatheters usually refer to polymeric catheters (usually less than 5mm in diameter and less than 1mm in wall thickness) obtained through micromachining technology, and have been widely used in automotive oil pipelines, optical fiber communication technology, precision instruments and biomedical technology, etc. field, there is a great demand in practical applications. However, the development of production and preparation technology in China is relatively slow, and there is no mature industrial production capacity in the field of some high-end polymer microtu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C48/09B29C48/88B29C48/885B29C48/90B29C48/92B29K23/00B29K75/00B29K77/00
CPCB29K2023/06B29K2023/12B29K2075/00B29K2077/00B29C48/09B29C48/885B29C48/901B29C48/9115B29C48/92B29C2948/92514B29C2948/9259B29C2948/92704
Inventor 聂敏杨昌华彭孜麟郭佳俊王琪
Owner SICHUAN UNIV
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