文章摘要
Experimental Study on Tensile Resistance of TPU Strengthening Anesthesia Catheter
Received:August 29, 2022  Revised:August 29, 2022
DOI：10.12136/j.issn.1000-890X.2024.02.0127
Key Words: TPU；strengthening anesthesia catheter；extrusion molding；tensile resistance
Author NameAffiliationE-mail
GUO Nan* Henan Tuoren Medical Device Co.，Ltd gnluckly@126.com 
MIAO Wei Henan Tuoren Medical Device Co.，Ltd  
CHENG Lingling Henan Tuoren Medical Device Co.，Ltd；Henan Key Laboratory of Medical Polymer Materials Technology and Application  
CHEN Pengtao Henan Tuoren Medical Device Co.，Ltd  
YANG Xiaole Henan Tuoren Medical Device Co.，Ltd  
LI Ruobing Henan Tuoren Medical Device Co.，Ltd  
LI Menglai Henan Tuoren Medical Device Co.，Ltd  
CHEN Yongzhen Henan Tuoren Medical Device Co.，Ltd  
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Abstract:
      Using thermoplastic polyurethane elastomer（referred to as TPU） particle as raw material and extrusion molding technology，TPU strengthening anesthesia catheter（referred to as TPU catheter，referring to the catheter body） was prepared.The effects of TPU particle properties，mouth mold and core rod diameters and process parameters on the tensile resistance of TPU catheters were studied.The results showed that when the grade of TPU particle for the main body of TPU catheter was 1195A，the grade of TPU particle for the strengthening tendon was TT-1055D，the mouth mold diameter was 2.8 mm，and the core rod diameter was 1.7 mm，the temperatures of the first，second and third zones of the barrel of extruder（25# extruder） for TPU particle plasticization of the main body were respectively 195，200 and 207 ℃，the temperatures of 25# extruder connecting part and corresponding flange were respectively 195 and 203 ℃，the temperatures of the first zone，second zone and third zone of the barrel of extruder（20# extruder） for TPU particle plasticization of the strengthening tendon were respectively 200，210 and 215 ℃，the temperatures of 20# extruder connecting part and corresponding flange were respectively 195 and 200 ℃，the temperatures of the front and rear molds of the machine head were respectively 195 and 200 ℃，the mouth mold temperature was 180 ℃，the screw speeds of 25# and 20#extruders were both 8.5 r · min-1，the fracture force of TPU catheter with an outer diameter of 1.0 mm reached 45.75 N，indicating a low risk of fracture.
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