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Spinning nozzle assembly, multi-cavity hollow fiber tube, preparation method of multi-cavity hollow fiber tube and medical instrument

A medical device and spinneret technology, which is applied in fiber processing, filament/thread forming, textile and papermaking, etc., can solve the problems of circular radial cross-section of the inner lumen of multi-cavity hollow fiber tubes, etc., and achieve the effect of reducing the pushing resistance.

Active Publication Date: 2022-05-06
ACCUPATH MEDICAL JIAXING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] A small part of the prior art uses a spinneret assembly with asymmetric flow channels, such as the radial cross-section of some inner chambers is crescent-shaped or square, but because of the asymmetry of the flow channels, it is impossible to make the multi-cavity hollow fiber tube All lumens are circular in radial cross-section

Method used

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  • Spinning nozzle assembly, multi-cavity hollow fiber tube, preparation method of multi-cavity hollow fiber tube and medical instrument
  • Spinning nozzle assembly, multi-cavity hollow fiber tube, preparation method of multi-cavity hollow fiber tube and medical instrument
  • Spinning nozzle assembly, multi-cavity hollow fiber tube, preparation method of multi-cavity hollow fiber tube and medical instrument

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preparation example Construction

[0046] The present invention also provides a method for preparing a multi-lumen hollow fiber tube, comprising the following steps:

[0047] S11: Send the polymer raw material particles into the screw with heater.

[0048] S12: The polymer raw material particles are heated in the screw to become a polymer liquid;

[0049] S13: The polymer liquid enters with the rotation of the screw image 3 Flow passage 130 of spinneret assembly 100 is shown.

[0050] S14: The polymer liquid leaves the spinneret assembly 100 from the outlet of the flow channel 130 after flowing through the flow channel 130;

[0051] S15: The polymer liquid leaving the outlet of the flow channel is cooled and shaped to obtain the multi-lumen hollow fiber tube.

[0052] Optionally, before the polymer liquid enters the spinneret assembly 100, it passes through a filter as the screw rotates, and the function of the filter is to filter out insoluble particles in the polymer liquid.

[0053] Optionally, the poly...

Embodiment 1

[0067] use image 3 The shown spinneret assembly 100 has an elliptical air hole needle 120 with a ratio of the minor axis to the major axis of 0.71. The double-cavity hollow fiber tube is made of nylon, and the temperature inside the spinneret assembly 100 is 250°C. Stomach needles 120 are fed with the same air pressure, and the inner diameters of the two circular cavities of the prepared multi-lumen hollow fiber tube are both 0.144mm, and the ellipticities are respectively 0.0004" and 0.0003". Figure 5 shown. The prepared multi-lumen hollow fiber tube is applied in a peripheral central venous catheter, a guide wire is passed into one cavity, and a medical solution is passed into the other cavity.

Embodiment 2

[0069] use image 3 The shown spinneret assembly 100 has an elliptical air hole needle 120 with a ratio of the minor axis to the major axis of 0.65. Polyurethane is used as a raw material to make a three-cavity hollow fiber tube. The temperature inside the spinneret assembly 100 is 165° C. The extreme difference in air pressure between the stomatal needles 120 is 5inH 2 0, the internal diameters of three circular cavities of the multi-cavity hollow fiber tube made are respectively 0.212mm, 0.171mm, 0.208mm, and the ellipticity is respectively 0.0004", 0.0003", 0.0004", such as Figure 6 shown. The so-called extremely poor inflation pressure refers to the value of the air pressure in the stomata needle with the largest inflation pressure minus the air pressure in the stomata needle with the smallest inflation pressure among the three stomata needles. The prepared multi-lumen hollow fiber tube is applied in a physiological radiofrequency ablation catheter, two larger cavities ar...

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Abstract

The invention discloses a spinning nozzle assembly, a multi-cavity hollow fiber tube, a preparation method of the multi-cavity hollow fiber tube and a medical instrument. The spinning nozzle assembly comprises a shell and at least two air hole needles; the shell is of a cylindrical hollow structure, the at least two air hole needles are arranged in the shell and are respectively parallel to the axial direction of the shell, air inflation holes are formed in the air hole needles, a cavity part between the air hole needles and the shell forms a flow channel, and the radial section of each air hole needle is oval. The spinning nozzle assembly is adopted in the preparation method, and the preparation method comprises the following steps that S1, macromolecular liquid enters a flow channel of the spinning nozzle assembly; s2, the polymer liquid flows through the flow channel and then leaves the spinning nozzle assembly from a flow channel outlet; and S3, cooling the polymer liquid discharged from the outlet of the flow channel, and shaping. And the multi-cavity hollow fiber tube of which the radial cross section of each inner cavity is a circle of which the ovality is less than or equal to 0.0005 ''can be prepared.

Description

technical field [0001] The invention relates to the technical field of medical device preparation, in particular to a spinneret assembly, a multi-cavity hollow fiber tube, a preparation method thereof, and a medical device. Background technique [0002] Multilumen hollow fiber tubes have a wide range of applications in the fields of industry, electronics, and especially medical treatment. In these fields, there are many application scenarios that require tubes to transmit different forms of substances at the same time, such as optical fiber cables for signal transmission, medical guide wires for adjuvant therapy and other solids, such as liquid medicines for drug delivery, and Liquids such as cleaning fluids, various gases for different functions such as life support, anesthesia, and pressure differential establishment. Bundling or bonding multiple tubes together can meet the above needs, but compared with the increase in the overall radial dimension of the tubes or the ris...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/247
CPCD01D5/247
Inventor 余木火李兆敏邓智华戴礼浩何光彬
Owner ACCUPATH MEDICAL JIAXING CO LTD
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