CN116271442A - A kind of plastic hydrophilic guide wire and its core wire preparation method - Google Patents

Abstract

The invention discloses a plastic hydrophilic guide wire and a preparation method of the plastic hydrophilic guide wire core wire, comprising a plastic core wire, a water-based polymer coating layer coated outside the plastic core wire and a cylindrical elastic piece arranged between the plastic core wire and the water-based polymer coating layer; a hydrophilic coating is arranged on the surface of the water-based polymer coating layer; the hydrophilic coating is sprayed on the water-based polymer coating layer through a plasma spraying process; a method for preparing a core wire, comprising the steps of: step S1, mixing plastic raw material powder; s2, filling the mixed powder in the step S1 into a die cavity and pressing the powder into a blank; step S3, adding glue into the blank pressed in the step S2 according to a proportion; s4, placing the blank prepared in the step S3 into a high-temperature furnace for powder metallurgy synthesis, wherein the high-temperature furnace is vacuum or is filled with protective atmosphere; the core wire material is not limited to the metal material any more, and the strength of the core wire is stronger; the plastic is used as the raw material for manufacturing the core wire, so that the cost is saved, the preparation process is simple, and the flow is short; and is easier to shape.

Description

A kind of plastic hydrophilic guide wire and its core wire preparation method

technical field

The invention relates to the technical field of guide wires, in particular to a plastic hydrophilic guide wire and a method for preparing a core wire thereof.

Background technique

Interventional therapy is a kind of minimally invasive treatment using modern high-tech means—that is, under the guidance of medical imaging equipment, special catheters, guide wires and other precision instruments are introduced into the human body to diagnose and locally treat pathological conditions in the body; Some plastic core wires are mainly made of metal materials as a whole, which consumes a lot of metal.

Contents of the invention

The object of the present invention is to solve the shortcomings in the prior art, and propose a plastic hydrophilic guide wire and a method for preparing the core wire thereof.

In order to achieve the above object, the present invention adopts the following technical solutions:

A plastic hydrophilic guide wire, comprising a plastic core wire, a water-based polymer cladding layer coated on the outside of the plastic core wire, and a water-based polymer cladding layer arranged between the plastic core wire and the water-based polymer cladding layer A cylindrical elastic member; the surface of the water-based polymer coating layer is provided with a hydrophilic coating; the hydrophilic coating is sprayed on the water-based polymer coating layer by a plasma spraying process.

Preferably, the water-based polymer coating layer includes a polyurethane coating layer, a nylon coating layer, and a block polyetheramide elastomer coating layer.

Preferably, the hydrophilic coating includes a modified hydrophilic PTFE hydrophilic coating.

Preferably, a method for preparing a core wire, comprising the following steps:

Step S1, mixing plastic raw material powder;

In step S2, the powder mixed in step S1 is packed into a mold cavity and pressed into a billet;

Step S3, adding glue in proportion to the blank pressed in step S2;

Step S4, put the billet prepared in step S3 into a high-temperature furnace for powder metallurgy synthesis, and the high-temperature furnace is vacuum or filled with a protective atmosphere.

Preferably, in the step S2, the pressure applied for the pressing ranges from 10 MPa to 80 MPa.

Preferably, in the step S3, the ratio of the blank to the glue is 2:1.

Preferably, the plastic is made of PV, PVC or polyethylene.

Compared with prior art, the beneficial effect of the present invention is:

The present invention designs a plastic hydrophilic guide wire and its core wire preparation method. The material of the core wire is no longer limited to metal material, and the strength of the core wire is stronger; the use of plastic as the raw material for the core wire is more cost-effective, and the preparation process is simple and the process flow is simple. Short; easier to shape.

Description of drawings

Fig. 1 is the structural representation that the present invention proposes;

Fig. 2 is a schematic flow chart of the core filament preparation method proposed by the present invention.

illustration:

1. Plastic core wire, 2. Water-based polymer coating, 3. Hydrophilic coating.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, and therefore cannot be construed as limiting the present invention; the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be construed as indicating or implying relative importance; in addition, unless otherwise Clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a Electrical connection; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

Referring to Figures 1 to 2, a plastic hydrophilic guide wire includes a plastic core wire, a water-based polymer coating coated on the outside of the plastic core wire, and a plastic core wire and a water-based polymer coating. The cylindrical elastic part in between; the surface of the water-based polymer coating layer is provided with a hydrophilic coating; the hydrophilic coating is sprayed on the water-based polymer coating layer by a plasma spraying process.

Wherein, the water-based polymer coating layer includes a polyurethane coating layer, a nylon coating layer, and a block polyetheramide elastomer coating layer.

The hydrophilic coating includes a modified hydrophilic PTFE hydrophilic coating.

A method for preparing a core wire, comprising the steps of:

Step S1, mixing plastic raw material powder;

In step S2, the powder mixed in step S1 is packed into a mold cavity and pressed into a billet;

Step S3, adding glue in proportion to the blank pressed in step S2;

Step S4, put the billet prepared in step S3 into a high-temperature furnace for powder metallurgy synthesis, and the high-temperature furnace is vacuum or filled with a protective atmosphere.

In step S2, the range of pressure applied for pressing is 10MPa-80MPa; such as 10MPa, 15MPa, 20MPa, 25MPa, 30MPa, 35MPa, 40MPa, 45MPa, 50MPa, 55MPa, 60MPa, 65MPa, 70MPa, 75MPa, or 80MPa; step In S3, the ratio of blank to glue is 2:1; in step S4, the heating temperature of the high-temperature furnace is 850°C, the holding time is 4 hours, and the vacuum degree is 10-3Pa; the plastic is made of PV, PVC or polyethylene.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solutions of the present invention and its Any equivalent replacement or change of the inventive concept shall fall within the protection scope of the present invention.

Claims (7)

1. The hydrophilic plastic guide wire is characterized by comprising a plastic core wire, a water-based polymer coating layer coated outside the plastic core wire and a cylindrical elastic piece arranged between the plastic core wire and the water-based polymer coating layer; the surface of the water-based polymer coating layer is provided with a hydrophilic coating; the hydrophilic coating is sprayed on the aqueous polymer coating layer through a plasma spraying process.

2. The plastic hydrophilic guidewire of claim 1, wherein the aqueous polymer coating comprises a polyurethane coating, a nylon coating, a block polyether amide elastomer coating.

3. The plastic hydrophilic guidewire of claim 1, wherein the hydrophilic coating comprises a modified hydrophilic PTFE hydrophilic coating.

4. The preparation method of the core wire is characterized by comprising the following steps of:

step S1, mixing plastic raw material powder;

s2, filling the mixed powder in the step S1 into a die cavity and pressing the powder into a blank;

step S3, adding glue into the blank pressed in the step S2 according to a proportion;

and S4, placing the blank prepared in the step S3 into a high-temperature furnace for powder metallurgy synthesis, wherein the high-temperature furnace is vacuum or is filled with protective atmosphere.

5. The method according to claim 4, wherein in the step S2, the pressing force is in a range of 10MPa to 80MPa.

6. The method according to claim 4, wherein in the step S3, the ratio of the blank to the glue is 2:1.

7. The method of claim 4, wherein the plastic is a PV material, a PVC material, or a polyethylene material.

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