CN217539949U - Oxygen-blocking medical catheter - Google Patents

Abstract

The utility model relates to the field of medical supplies, a hinder oxygen medical catheter is disclosed, should hinder oxygen medical catheter and include: first elastic layer to and set gradually from inside to outside the first tie coat, oxygen layer, second tie coat and the second elastic layer of first elastic layer periphery, the thickness that hinders the oxygen layer is 0.05mm ~ 0.1mm, first elastic layer with the thickness on second elastic layer adds 60% that are greater than whole pipe wall thickness, just first elastic layer with the material of second elastic layer is TPE. The utility model has the advantages that: the whole pipe has the phenomenon of hard fracture when having the pliability to have good separation effect, have a great deal of excellent performance of TPE material concurrently.

Description

Oxygen-blocking medical catheter

Technical Field

The utility model relates to the field of medical supplies, in particular to an oxygen-blocking medical catheter.

Background

At present, most medical catheters used on an in-vitro diagnostic instrument do not have oxygen resistance, so that the medical catheters are easy to generate chemical reaction with gas in the air in the liquid conveying process to influence the detection liquid, thereby causing the change of some detection indexes. And the oxygen barrier layer is arranged on a small part of the medical catheter, but the flexibility of the oxygen barrier layer material is poor, and if the oxygen barrier layer is not reasonably arranged, the flexibility of the catheter is easily lost, so that the catheter cannot be connected to a diagnostic instrument for use. Therefore, there is a need for an oxygen barrier medical catheter that is both resistant to reaction with the outside air and flexible.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a hinder oxygen medical catheter, it can be isolated with the liquid in the pipe and the outside air of pipe, compromise the pliability of pipeline simultaneously.

The purpose of the application is realized by the following technical scheme:

an oxygen barrier medical catheter comprising: first elastic layer to and set gradually from inside to outside the first tie coat of first elastic layer periphery, hinder oxygen layer, second tie coat and second elastic layer, the thickness that hinders the oxygen layer is 0.05mm ~ 0.1mm, first elastic layer with the thickness of second elastic layer adds 60% that are greater than whole pipe wall thickness, just first elastic layer with the material of second elastic layer is TPE.

In some embodiments of the present application, the first elastic layer and the second elastic layer each have a thickness of 0.3mm to 0.9mm.

In some embodiments of the present application, the first elastic layer and the second elastic layer each have a thickness of 0.45mm to 0.75mm.

In some embodiments of the present application, the first elastic layer and the second elastic layer each have a thickness of 0.6mm.

In some embodiments of the present application, the material of the oxygen barrier layer is EVOH.

In some embodiments of the present application, the material of the first adhesive layer and the second adhesive layer is a hot melt adhesive.

In some embodiments of the present application, the first adhesive layer and the second adhesive layer each have a thickness of 0.05mm to 0.15mm.

In some embodiments of the present application, the first and second bonding layers each have a thickness of 0.1mm.

In some embodiments of the present application, the conduit is made using an extrusion process.

The utility model provides a hinder oxygen medical catheter, adopt five layer structure, inlayer and outmost be first elastic layer and second elastic layer respectively, the middle oxygen layer that hinders for, first elastic layer and second elastic layer are connected with oxygen layer through first tie coat and second tie coat respectively, first elastic layer and second elastic layer are whole for the pipe provides elasticity, the sum of the thickness of the first elastic layer of TPE material and second elastic layer is greater than 60% of whole wall thickness simultaneously, be difficult to the phenomenon that the dead book appears when making the pipe whole have pliability, oxygen layer plays the effect of oxygen in the isolated air, avoid liquid and air reaction in the pipe, hinder the oxygen layer thickness simultaneously and be 0.05mm ~ 0.1mm, not only have good separation effect, the holistic pliability of pipe has been remain simultaneously.

Drawings

Fig. 1 is a schematic diagram of a five-layer oxygen barrier conduit according to the scheme.

In the figure, 1, a first elastic layer; 2. a first adhesive layer; 3. an oxygen barrier layer; 4. a second adhesive layer; 5. a second elastic layer.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present application, it should be understood that the terms "inner", "outer", "circumferential", "intermediate", and the like used herein to indicate an orientation or positional relationship based on that shown in the drawings are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1, an embodiment of the present application provides an oxygen barrier medical catheter, comprising: first elastic layer 1 to and set gradually from inside to outside first tie coat 2, oxygen layer 3, second tie coat 4 and the second elastic layer 5 hinder of first elastic layer 1 periphery, the thickness that hinders oxygen layer 3 is 0.05mm ~ 0.1mm, first elastic layer 1 with the thickness of second elastic layer 5 adds 60% that is greater than whole pipe wall thickness, just first elastic layer 1 with the material of second elastic layer 5 is TPE.

Based on above-mentioned technical scheme, hinder oxygen medical catheter and adopt five layer structures, inlayer and outmost are first elastic layer 1 and second elastic layer 5 respectively, the centre is for hindering oxygen layer 3, first elastic layer 1 and second elastic layer 5 are connected with hindering oxygen layer 3 through first tie coat 2 and second tie coat 4 respectively, first elastic layer 1 and second elastic layer 5 are whole for the pipe provides elasticity, the thickness sum of TPE material's first elastic layer 1 and second elastic layer 5 is greater than 60% of whole wall thickness simultaneously, make the whole phenomenon that is difficult to appear the dead book when having the pliability of pipe, hinder oxygen layer 3 and play the effect of isolated oxygen in the air, avoid liquid and air reaction in the pipe, hinder oxygen layer 3 thickness simultaneously and be 0.05mm ~ 0.1mm, not only has good separation effect, the holistic pliability of pipe has been kept simultaneously. TPE, also called thermoplastic elastomer, is free of phthalates and latex proteins, has very low extractables or leachables even when in contact with water-based systems such as body fluids, has excellent sealing properties and can therefore be used as an inner layer material. And the TPE is a material with high elasticity, high strength, high rubber resilience and injection molding characteristics, is environment-friendly, nontoxic and safe, has wide hardness, excellent colorability, soft touch, weather resistance, fatigue resistance, high temperature resistance and excellent processability, does not need to be vulcanized, and can be recycled to reduce the cost.

In some embodiments of the present application, the first elastic layer 1 and the second elastic layer 5 each have a thickness of 0.3mm to 0.9mm. Because the sum of the thicknesses of the first elastic layer 1 and the second elastic layer 5 needs to be more than 60% of the wall thickness of the whole catheter, the thickness ranges of the first elastic layer 1 and the second elastic layer 5 can be obtained according to the thickness of a conventional oxygen-blocking medical catheter, the first elastic layer 1 and the second elastic layer 5 are preferably the same in thickness, the forming is convenient, the thickness of the catheter can be changed as required, and different use requirements are met.

Specifically, the thickness of each of the first elastic layer 1 and the second elastic layer 5 is 0.45mm to 0.75mm. After the requirements of the thickness proportion of the first elastic layer 1 and the second elastic layer 5 are guaranteed, the thickness in the middle can be selected, unqualified products caused by errors in the process of minimum thickness can be avoided, the thickness of the whole guide pipe is moderate, and the manufacture is easy.

More specifically, the first elastic layer 1 and the second elastic layer 5 each have a thickness of 0.6mm. The first elastic layer 1 and the second elastic layer 5 of 0.6mm combine the catheter to the most conventional thickness, able to simultaneously satisfy various requirements of flexibility, elasticity, etc.

In some embodiments of the present application, the material of the oxygen barrier layer 3 is EVOH. EVOH is a novel barrier material integrating good processability and gas barrier property, and the gas barrier property of EVOH is at least over tens of times higher than that of similar products. EVOH has excellent transparency, gloss, mechanical strength, stretchability, wear resistance, cold resistance and surface strength, and has the highest thermal stability in high-performance barrier resins, and is easy to process.

In some embodiments of the present application, the materials of the first adhesive layer 2 and the second adhesive layer 4 are both hot melt adhesives. The hot melt adhesive is a plastic adhesive, has simple production process, high adhesive strength and high speed, does not obviously attenuate the adhesive strength under high temperature and bending conditions, ensures the adhesive strength between layers and simultaneously ensures the stability of the conduit.

In some embodiments of the present application, the first adhesive layer 2 and the second adhesive layer 4 each have a thickness of 0.05mm to 0.15mm. Since the sum of the thicknesses of the first elastic layer 1 and the second elastic layer 5 needs to be more than 60% of the wall thickness of the whole catheter, the thicknesses of the first elastic layer 1 and the second elastic layer 5 and the thicknesses of the bonding layers need to be correspondingly considered, when the thicknesses of the first elastic layer 1 and the second elastic layer 5 are both minimum 0.3mm and the thickness of the oxygen barrier layer 3 is maximum 0.1mm, even if the thicknesses of the first bonding layer 2 and the second bonding layer 4 are both maximum 0.15mm, the finally obtained catheter wall thickness is 1mm, and the sum of the thicknesses of the first elastic layer 1 and the second elastic layer 5 is 0.6mm and is also in the critical value range of the wall thickness requirement, so the requirement of the catheter thickness is met. On the other hand, when the thickness of the first adhesive layer 2 and the second adhesive layer 4 is too small, for example, a thickness of 0.01mm or 0.02mm, there are problems such as difficulty in molding and insufficient adhesion, and therefore, it is most preferable to select the range of 0.05mm to 0.15mm.

Specifically, the first adhesive layer 2 and the second adhesive layer 4 each have a thickness of 0.1mm. The first bonding layer 2 and the second bonding layer 4 with the thickness of 0.1mm give consideration to the problems of material forming and bonding firmness, and can avoid the problem that the conduit is unqualified due to errors at the end point position.

In some embodiments of the present application, the catheter is made using an extrusion process. Five-layer structure shaping together can be moulded to extrusion moulding, and the tie coat bonds firmly, but continuous production, and production efficiency is high to can change different parts according to the demand, thereby obtain different products, compare other mode of production and have apparent advantage.

In conclusion, the utility model provides an oxygen medical catheter hinders, five-layer structure is adopted, inlayer and outmost are first elastic layer 1 and second elastic layer 5 respectively, the centre is oxygen layer 3 hinders, first elastic layer 1 and second elastic layer 5 are connected with oxygen layer 3 through first tie coat 2 and second tie coat 4 respectively, first elastic layer 1 and second elastic layer 5 wholly provide elasticity for the pipe, simultaneously the thickness sum of first elastic layer 1 and second elastic layer 5 is greater than 60% of whole wall thickness, be difficult to the phenomenon that the dead book appears when making the whole flexibility that has of pipe, oxygen layer 3 plays the effect of oxygen in the isolated air, avoid liquid and air reaction in the pipe, oxygen layer 3 thickness hinders simultaneously is 0.05mm ~ 0.1mm, not only has good separation effect, the holistic pliability of pipe has been kept simultaneously.

The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and substitutions can be made without departing from the technical principle of the present application, and these modifications and substitutions should also be regarded as the protection scope of the present application.

Claims (9)

1. An oxygen barrier medical catheter, comprising: first elastic layer to and set gradually from inside to outside the first tie coat, oxygen layer, second tie coat and the second elastic layer of first elastic layer periphery, the thickness that hinders the oxygen layer is 0.05mm ~ 0.1mm, first elastic layer with the thickness on second elastic layer adds 60% that are greater than whole pipe wall thickness, just first elastic layer with the material of second elastic layer is TPE.

2. The oxygen barrier medical catheter of claim 1, wherein the first and second elastic layers each have a thickness of 0.3mm to 0.9mm.

3. The oxygen barrier medical catheter of claim 2, wherein the first and second elastic layers each have a thickness of 0.45mm to 0.75mm.

4. The oxygen barrier medical catheter of claim 3, wherein the first and second elastic layers are each 0.6mm thick.

5. The oxygen barrier medical catheter of claim 1, wherein the material of the oxygen barrier layer is EVOH.

6. The oxygen barrier medical catheter of claim 1, wherein the material of the first and second adhesive layers is a hot melt adhesive.

7. The oxygen barrier medical catheter of claim 1, wherein the first adhesive layer and the second adhesive layer each have a thickness of 0.05mm to 0.15mm.

8. The oxygen barrier medical catheter of claim 7, wherein the first and second adhesive layers are each 0.1mm thick.

9. The oxygen barrier medical catheter of claim 1, wherein the catheter is made using an extrusion process.

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