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Double-layer composite remaining needle connecting tube and preparation method thereof

A double-layer composite and indwelling needle technology, which is applied in the field of medical materials, can solve the problems of accidental detachment of the connecting tube, high price, and difficulty in bonding, and achieve the effects of not easy to remove the tube, reduce premature extubation, and easy bonding

Inactive Publication Date: 2020-08-14
HENAN TUOREN MEDICAL DEVICE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PVC material has the advantages of easy bonding with other materials and strong bonding, but it contains plasticizers, which will precipitate harmful components when in contact with liquid medicine
TPU material is expensive and does not contain plasticizers, but it is not easy to bond with other materials, and there is a risk of accidental falling off of the connecting pipe after bonding

Method used

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  • Double-layer composite remaining needle connecting tube and preparation method thereof
  • Double-layer composite remaining needle connecting tube and preparation method thereof
  • Double-layer composite remaining needle connecting tube and preparation method thereof

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preparation example Construction

[0033] The present invention also provides a method for preparing the above-mentioned double-layer composite indwelling needle connecting tube, comprising the following steps:

[0034] A) the dried polyurethane pellets are extruded through a TPU extruder, the polyvinyl chloride pellets are extruded through a PVC extruder, and compounded in a double-layer composite extrusion die to obtain a double-layer composite embryo tube;

[0035] The extrusion parameters of the TPU extruder include:

[0036] Barrel zone 1: 170~175℃; Barrel zone 2: 173~178℃; Barrel zone 3: 180~185℃;

[0037] Flange: 178~183℃; mold temperature: 178~183℃; screw speed: 8~12r / min;

[0038] The extrusion parameters of the PVC extruder include:

[0039] Barrel zone 1: 168~172℃; Barrel zone 2: 170~175℃; Barrel zone 3: 175~180℃;

[0040] Flange: 173~178℃; Screw speed: 8~12r / min;

[0041] B) The double-layer composite embryo tube is subjected to sizing, cooling, traction and cutting to obtain a double-layer comp...

Embodiment 1

[0099] A double-layer composite indwelling needle connecting tube extrusion process comprises the following steps:

[0100] Step 1. According to the characteristics of the TPU pellets, put them into an oven for drying pretreatment. The drying temperature is set at 85°C and the drying time is 4 hours.

[0101] Step 2, install and connect the head mold to the TPU extruder, the PVC extruder is connected to the head mold through the connecting piece, the TPU extruder is in the same direction as the extrusion line, and the PVC extruder is placed vertically to the extrusion line . The connector is a cylindrical stainless steel pipe with threads at both ends, one end is threaded with a PVC extruder, and the other end is threaded with a double-layer compound extrusion die.

[0102] Step 3, turn on the power of the TPU extruder and the power of the PVC extruder, and set the TPU extrusion parameters: the first zone of the barrel is 173°C, the second zone of the barrel is 175°C, the thi...

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Abstract

The invention relates to the technical field of medical materials, in particular to a double-layer composite remaining needle connecting tube and a preparation method thereof. The double-layer composite remaining needle connecting tube comprises an inner layer and an outer layer, and polyvinyl chloride compounded on a polyurethane material is used as the outer layer. The inner layer of the double-layer composite remaining needle connecting tube is made of the polyurethane material, does not contain plasticizer DEHP, does not generate harmful components when being in contact with liquid medicine, and can reduce teratogenesis risks of clinical infusion patients; the outer layer is made of the polyvinyl chloride, so that the double-layer composite remaining needle connecting tube and a tee joint can be bonded more easily, tube disengagement is not prone to occurring, early tube drawing caused by accidental disengagement of the connecting tube clinically is reduced, and meanwhile the economic benefit of the double-layer composite remaining needle connecting tube is more obvious than that of a polyurethane connecting tube. The preparation method of the double-layer composite remaining needle connecting tube is simple, feasible and high in operability.

Description

technical field [0001] The invention relates to the technical field of medical materials, in particular to a double-layer composite indwelling needle connecting tube and a preparation method thereof. Background technique [0002] At present, the production and consumption of intravenous indwelling needles in my country are mainly concentrated in the low-end field, which is mainly reflected in the fact that the materials of the products are mainly medical plastics such as PP and PVC, and new materials such as TPU materials are used less. In the future, with the improvement of consumer spending power, the price sensitivity of intravenous indwelling catheters will gradually decrease, and the quality requirements for its products will increase, especially the rejection of DEHP-containing materials will become stronger and stronger, so DEHP-free TPU connection tubes with components are becoming more and more popular. PVC material has the advantages of being easy to bond with oth...

Claims

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Application Information

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IPC IPC(8): B32B1/08B32B27/08B32B27/30B32B27/40B29C48/92B29C48/00B29B13/04A61M5/158
CPCA61M5/158B29B13/045B29L2031/753B32B1/08B32B27/08B32B27/304B32B27/40B32B2250/02B32B2250/24B32B2535/00B29C48/0022B29C48/92B29C2948/9258B29C2948/92704
Inventor 程玲玲魏永飞王国诰赵明学刘珍徐继元韩彬华
Owner HENAN TUOREN MEDICAL DEVICE GRP
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