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Medical fiber preparation method and uses thereof

A fiber and drafting technology, which is applied in the field of medical fiber preparation, can solve the problems of unstable speed synchronizing in the same proportion, unsuitable for medical fiber curling, and the motor is easy to get hot, so as to increase the interface residence time and facilitate cultivation. cells, ensuring uniformity

Inactive Publication Date: 2008-09-17
SHANGHAI JURUI BIOMATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Spinning medical fibers with the existing melt spinning equipment technology has the following defects: 1, spinning and winding, the speed of drafting is synchronously and proportionally adjusted at slow speeds, and the motor is prone to heat
2. There is a lack of multi-section and multi-interface hot roller one-step drafting. Because medical fibers involve the safety of the human body, they must ensure very stable fiber strength, shrinkage and mechanical properties. 3. The current mechanism for curl formation in chemical fiber equipment, There are mainly the crimping of the rotating piece in the filament adding, the composite crimping of the short filament, and the crimping of the mechanical wheel, which are not suitable for crimping medical fibers, because these methods have the defects of fiber damage or fiber entanglement, and are not easy to open.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Raw material: polymethacrylate. The drying time is 12 hours, and the drying temperature is at 50-130°C (20°C per hour) for 4 hours, and at 130°C for 6 hours. Cooling and discharging for 2 hours, moisture content: 12ppm. The temperature of each zone of the spinning screw: cooling zone: 50°C, preheating zone: 110°C; melting zone: 170°C; compression zone: 175°C; extrusion zone: 185°C; spinning box elbow: 180°C; spinning temperature : 182°C. Metering pump: 7 rpm. Wind speed: 0.32 m / s, wind temperature: 18°C, blowing plate distance: 75cm. Winding speed: 480m / min, oil tanker: 18 rpm, nozzle under-extension ratio: 62 times. The temperature of the first level hot roller: 80℃, under-extension ratio: 2.8; the second-level hot roller temperature: 90℃, under-extension ratio 2.2; the third-level hot roller temperature: 110℃, under-extension ratio: 1.85; the fourth-level hot roller temperature: 125℃, Under-extension ratio: 1.55; Five-stage hot roller temperature: 135°C, under-extension r...

Embodiment 2

[0028] Material: Polylactic acid glycolic acid, granular. Drying time is 15 hours, drying temperature: heating up for 6 hours, 20°C per hour, keeping warm for 7 hours, at 135°C. Cool down and discharge for 2 hours. Water content: 16ppm. The temperature of each zone of the spinning screw: cooling zone: 65°C, preheating zone: 160°C; melting zone: 205°C; compression zone: 215°C; extrusion zone: 210°C; spinning box elbow: 205°C; spinning temperature :202℃. Metering pump: 12 rpm. Wind speed: 0.38m / min, wind temperature: 21℃, blowing plate distance: 80cm. Winding speed: 520m / min, oil tanker: 22 rpm, nozzle under-extension ratio: 70 times. The temperature of the first-stage hot roller: 89℃, under-extension ratio: 2.96; the temperature of the second-stage hot roller: 110℃, under-extension ratio: 2.56; the third-stage hot roller temperature: 120℃, under-extension ratio: 1.92; the fourth-stage hot roller temperature: 135℃, Under-extension ratio: 1.57; five-stage hot roller temperature: 140°...

Embodiment 3

[0030] Raw material: polypropylene-polyvinyl alcohol copolymer. Drying temperature: 2 hours at 100°C, 3 hours at 115°C, cooling and discharging for 1 hour, a total of 6 hours of drying time, moisture content: 45ppm. The temperature of each zone of the spinning screw: cooling zone: 90°C, preheating zone: 150°C; melting zone: 210°C; compression zone: 225°C; extrusion zone: 215°C; spinning box elbow: 215°C; spinning temperature : 220°C. Metering pump: 15 rpm. Wind speed: 0.4 m / min, wind temperature: 22 ℃, blowing plate distance: 89 cm. Winding speed: 650m / min, oil tanker: 29 rpm, nozzle under-extension ratio: 89 times. The temperature of the first stage hot roller: 105℃, under-extension ratio: 3.2; the second-stage hot roller temperature: 120℃, under-extension ratio 2.4; the third-stage hot roller temperature: 125℃, under-extension ratio: 1.52; the fourth-stage hot roller temperature: 135℃, Under-extension ratio: 1.35; Five-stage hot roller temperature: 140°C, under-extension ratio: ...

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PUM

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Abstract

The invention discloses a method for preparing medical fiber and the application thereof, and includes the steps of drying, spinning, multilevel heat energy drafting, rolling, fiber placing, flow meshing and curling, and shrink-setting, wherein the multilevel heat energy drafting adopts single-stage process drafting of a plurality of double-rolls heating, and the flow meshing and curling step is carried out by a flow contact wheel for heating and curling. The method of the invention can reduce as much material for the trial run as possible, the double-rolls increase the upper bundle heating area, the interfacial residence time is increased, thereby ensuring the uniformity of the mechanical properties of the medical fiber, such as mightiness; having better crimpability and decentrality; and guaranteeing the continuous production of the medical fiber pipelining.

Description

1. Technical Field: [0001] The invention relates to the technical field of chemical fibers, and more particularly to a preparation method and application of medical fibers. 2. Background technology: [0002] Spinning medical fibers with the existing melt spinning equipment technology has the following defects: 1. The speeds of spinning and winding, and drafting are synchronized and proportionally adjusted. The speed is unstable in the slow gear, and the motor is easy to get hot. Because the raw materials for spinning medical fibers are generally extremely expensive, the slow speed stability of the screw discharge, spinning components and winding heads must be fully considered. After the fiber quality operation status of each process reaches the technical indicators, the synchronous and the same rate of increase is normal. Run production. 2. Lack of multi-section and multi-interface hot roll one-step drafting. Because medical fibers involve the safety of the human body, they must ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D1/00D01D5/08D01D5/092D01D5/098D02G1/16D02J1/22D02J13/00D06C7/02D01F6/62D01F6/28D01F6/78A61L15/22A61L17/00A61L27/14
Inventor 郯志清刘伟曹谊林倪建华张佩华崔磊唐乃杰邓丹
Owner SHANGHAI JURUI BIOMATERIALS
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