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Remaining needle hose, hose extrusion system and hose extrusion process

An extrusion process and indwelling needle technology, applied in the direction of needles, instruments introduced into the body, etc., can solve the problems of easy rupture of the hose and flow into the blood vessel, easy breakage and blockage of the hose, poor biocompatibility, etc. Low extrusion accuracy and good histocompatibility

Pending Publication Date: 2019-10-11
HENAN TUOREN MEDICAL DEVICE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of this, the purpose of the present invention is to provide a TPU indwelling needle hose, and also provide a hose extrusion system and a basic hose process for making the hose, which can solve the above-mentioned clinical performance of the FEP indwelling needle It is easy to lead to the occurrence of phlebitis, easy to form thrombus, poor biocompatibility, easy to fold and block the hose, easy to break the hose and flow into the blood vessel.

Method used

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  • Remaining needle hose, hose extrusion system and hose extrusion process
  • Remaining needle hose, hose extrusion system and hose extrusion process

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no. 1 Embodiment

[0063] The first specific embodiment of the present invention provides an indwelling needle hose, which is made of TPU material. TPU, the English name is Thermoplastic polyurethanes, and the Chinese name is thermoplastic polyurethane elastomer rubber.

[0064] The indwelling needle hose made of TPU material provided by the first specific embodiment of the present invention can not only effectively avoid the clinical manifestations of FEP indwelling needles in the prior art, which easily lead to the occurrence of phlebitis, easy to form thrombus, poor biocompatibility, The hose is easy to fold and block the tube, and the hose is easy to break and flow into the blood vessel. Moreover, it has the following advantages in clinical application:

[0065] (1) The material is soft and has good tissue compatibility;

[0066] (2) It can effectively reduce the incidence of phlebitis, making it safer and more comfortable to use;

[0067] (3) It has excellent softening function, which can...

no. 2 Embodiment

[0073] see figure 1 , figure 1 Schematic diagram of the structure of the hose extruding system provided for the second specific embodiment of the present invention.

[0074] The second embodiment of the present invention provides a hose extrusion system, which is used to make the indwelling needle hose made of TPU as provided in the first embodiment of the present invention.

[0075] The hose extrusion system provided by the second specific embodiment of the present invention includes an extrusion host, a melt pump, a head mold, a cooling and setting device, a diameter measurement control system, and a traction and cutting machine. in:

[0076] The extruder is a material processing and molding equipment, which is used to process TPU pellets into rubber (that is, TPU plastic melt), and extrude the rubber into the melt pump. Specifically, the extrusion host can use 30 #extrude host;

[0077] The melt pump, that is, the melt pressure gear pump, is used to control the extrusio...

no. 3 Embodiment

[0105] see figure 2 , figure 2 The flow chart of the hose extrusion process provided by the third specific embodiment of the present invention.

[0106] The third embodiment of the present invention provides a hose extrusion process, which can be applied to make the indwelling needle hose made of TPU as provided in the first embodiment above.

[0107] The hose extrusion process provided by the third specific embodiment of the present invention includes the following steps:

[0108] Step S1: The extruder host processes the TPU pellets into rubber, and squeezes the rubber into the melt pump;

[0109] Step S2: The melt pump sends the rubber material into the head mold, and monitors the actual extrusion pressure of the rubber material extruded by the extrusion host through the extrusion pressure closed-loop automatic feedback control system, and adjusts the extrusion according to the actual extrusion pressure The screw speed of the main engine;

[0110] Step S3: The head mol...

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Abstract

The invention discloses a remaining needle hose, a hose extrusion system and a hose extrusion process. The remaining needle hose is made from TPU material. The hose extrusion system and process are used for producing the remaining needle hose made from the TPU material. The hose extrusion system comprises an extrusion main machine, a melt pump, a machine head mold, a cooling and shaping device, adiameter measuring control system and a traction cutting machine. An extrusion pressure closed-loop automatic feedback control system is arranged between the extrusion main machine and the melt pump,and is used for monitoring the actual extrusion pressure of rubber material extruded by the extrusion main machine so as to adjust the rotating speed of a screw rod of the extrusion main machine; anda traction closed-loop automatic feedback control system is arranged in the diameter measuring control system, and is used for monitoring the actual outer diameter and / or the actual inner diameter ofa pipe body so as to adjust the traction speed of the traction cutting machine. According to the hose extrusion system, the defect of an FEP remaining needle in the prior art can be overcome, and thehose extrusion system has the advantages of being good in tissue compatibility, safe, comfortable, resistant to folding, free of adsorption of medicines and the like in clinical applications.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an indwelling needle hose, a hose extrusion system and a hose extrusion process. Background technique [0002] The indwelling needle is a product used for intravenous indwelling infusion, and its core component is the needle core hose. The traditional indwelling needle product hose uses FEP (Fluorinated ethylene propylene, also known as fluorinated ethylene propylene copolymer) material, perfluoroethylene propylene copolymer) material. The extrusion molding process of FEP hose is complicated, and the precision is not easy to control; the melting point of FEP crystal is 304°C, and the density is 2.15g / cm3. It is a kind of soft plastic, and its tensile strength, wear resistance and creep resistance are lower than Many engineering plastics. It is chemically inert and has a low dielectric constant over a wide temperature and frequency range. [0003] The molding and proces...

Claims

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Application Information

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IPC IPC(8): B29C48/10B29C48/25B29C48/90B29C48/92A61M5/158
CPCA61M5/158B29C48/0022B29C48/10B29C48/901B29C48/92
Inventor 卢志增魏永飞王国诰李新东陈鹏涛
Owner HENAN TUOREN MEDICAL DEVICE GRP
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