WO2019119932A1

WO2019119932A1 - X-ray developing line, production method therefor, and production device

Info

Publication number: WO2019119932A1
Application number: PCT/CN2018/109486
Authority: WO
Inventors: 肖望东; 徐令军; 张文凯; 徐小连
Original assignee: 深圳职业技术学院; 深圳市源邦科技有限公司
Priority date: 2017-12-21
Filing date: 2018-10-09
Publication date: 2019-06-27
Also published as: CN108277563A

Abstract

An X-ray developing line, a production method therefor and a production device, the X-ray developing line being composed of a housing layer and a core line; the housing layer is coated outside of the core line, and the housing layer is made of a housing layer material; the housing layer material is composed of a modified thermoplastic elastomer and a developer; the developer comprises one or more from among barium sulfate, bismuth oxide or metal tungsten. The X-ray developing line is composed of the two components of the core line and the housing material; on one hand, the high strength of the core line may be used to ensure the strength of the X-ray developing line so as to reduce the elasticity of the X-ray developing line, thus when woven into gauze or otherwise combined with a gauze, the X-ray developing line is less likely to break, and the outer diameter is not reduced due to extension. On the other hand, the development line may be rapidly extruded due to the strength and the pulling effect of the core line.

Description

X-ray developing line, production method thereof, and production equipment

Technical field

Embodiments of the present application relate to the field of medical device technology, and in particular, to an X-ray developing line, a method for producing the same, and a production device.

Background technique

In order to not leave the used gauze in the patient during the operation, the surgical gauze used has a developing line which is not penetrated by X-rays and can be clearly displayed on the X-ray machine display or the film.

The inventors found in the process of implementing the present application that the conventional developing line has only a single structure or is woven from a plurality of wires. The development line of a single structure has insufficient tensile strength, and the development line woven from a plurality of strands has a poor developer performance due to a low developer content.

Summary of the invention

The embodiment of the present application is directed to an X-ray developing line, a production method thereof, and a production apparatus, which are capable of solving the technical problem that the strength of the existing developing line is insufficient and the developing performance is poor.

In order to solve the above technical problem, one technical solution adopted by the embodiment of the present application is to provide an X-ray developing line, which is composed of a shell layer and a core wire, and the shell layer is coated outside the core wire, and the shell layer Made of a shell material; the shell material is composed of a modified thermoplastic elastomer and a developer; the developer includes one or more of barium sulfate, barium oxide or metal tungsten.

Optionally, the core wire is a cotton wire, the core wire has a diameter of 0.32 mm; and the modified thermoplastic elastomer is a TPE.

Optionally, the core wire is a polyester thread, the core wire has a diameter of 0.25 mm; and the modified thermoplastic elastomer is a TPE.

Optionally, the core wire is a viscose fiber thread having a diameter of 0.28 mm; and the modified thermoplastic elastomer is a thermoplastic polyurethane elastomer.

Optionally, the core wire is a nylon fiber thread, the core wire has a diameter of 0.23 mm; and the modified thermoplastic elastomer is a thermoplastic polyurethane elastomer.

Optionally, the shell material consists of the following materials in terms of weight percent:

The compound is tetrakis[β-(3,5-di-tert-butyl 4-hydroxyphenyl)propionic acid] pentaerythritol ester and dilauryl thiotripropionate compounded in a 1:1 ratio.

Optionally, in the cross section of the X-ray developing line, an area ratio of a shell layer and a core line of the X-ray developing line is greater than or equal to 3.

In order to solve the above technical problem, another technical solution adopted by the embodiment of the present application is to provide a method for producing an X-ray developing line, which comprises: pretreating a shell material as described above, and the shell The layer material is placed in the hopper of the extruder; the core wire is straightened and passed through the head of the extruder; the shell material is melted by the extruder and the core wire is wrapped; after cooling The X-ray developing line is obtained.

Optionally, the method further comprises: detecting an outer diameter of the X-ray development line; and adjusting a rotational speed of the extruder according to the outer diameter.

In order to solve the above technical problem, another technical solution adopted by the embodiment of the present application is to provide an X-ray developing line production apparatus, which comprises: a core wire paying device, a core wire drawing machine, a tension control device, a core wire feeder, a single screw extruder, a cooling water tank, a traction device, and a winding device; the core wire payout device is configured to output a core wire at a predetermined speed; the core wire passes through the core wire sequentially An extractor and the core feeder, wherein the tension control device is disposed between the core take-up machine and the core feeder for maintaining a straight line and maintaining a certain tension; a single screw extruder for melting the shell material and extruding the melted shell material from the head of the single screw extruder to coat the outer layer of the core; the cooling sink and The screw extruder is connected for cooling an X-ray developing shell output from the single-screw extruder head and covering the outer layer of the core wire; the pulling device is connected to the other end of the cooling water tank For pulling the X-ray developing line; the winding For opposing shell coated with a composite core-shell structure developing material as a roll.

Optionally, the production apparatus further includes an outer diameter control feedback device; the outer diameter control feedback device is disposed between the cooling water tank and the traction device for detecting the X outputted through the cooling water tank An outer diameter of the ray developing line; the outer diameter control feedback device is further electrically connected to the single screw extruder and the traction device for adjusting the extrusion of the single screw extruder according to the outer diameter feedback Speed or the speed of the traction device.

The beneficial effects of the embodiments of the present application are as follows: The X-ray developing line provided by the present application is composed of a core component and a shell material, and on the one hand, the high strength of the core wire can be utilized to ensure the strength of the X-ray developing line to reduce the intensity. The elasticity of the X-ray developing line is such that it does not easily break when it is woven into the gauze or otherwise bonded to the gauze, and the outer diameter is not reduced by the extension. On the other hand, rapid extrusion of the development line can be achieved due to the strength of the core wire and the pulling action.

DRAWINGS

1 is a schematic structural view of a production apparatus of an X-ray development line of a core-shell composite structure according to an embodiment of the present application;

2 is a schematic flow chart of a method for producing an X-ray development line of a core-shell composite structure according to an embodiment of the present application.

Detailed ways

In order to make the objects, technical solutions, and advantages of the present application more comprehensible, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the application and are not intended to be limiting.

The embodiment of the present application first provides a production apparatus 100 for an X-ray development line of a core-shell composite structure. The production apparatus 100 includes: a core wire pay-off device 11, a core thread extractor 12, a tension control device 13, a core wire feeder 14, a single-screw extruder 15, a cooling water tank 16, an outer diameter control feedback device 17, and traction Apparatus 18 and winding device 19.

Core wire take-up device 11, core wire extractor 12, tension control device 13, core wire feeder 14, single screw extruder 15, cooling water tank 16, outer diameter control feedback device 17, traction device 18, and winding device 19 are connected in order.

The core wire take-up device 11 is for discharging a core wire, the core wire drawing machine 12 is for driving a core wire movement, and the tension control device 13 is for performing a core wire taken out from the core wire drawing machine 12. Straightening, in the present embodiment, the tension control device 13 can be selected by a suitable tension controller. When the feed speed of the core wire is constant, the control core wire has a certain tension when the lead wire take-up machine 12 draws the speed. When speeding up or slowing down, the tension controller adjusts the tension of the core wire to increase or decrease to achieve tension balance. The shell material is placed in the single-screw extruder 15, and the shell material is melt-plasticized by the head of the single-screw extruder 15, and the shell material can be coated with the melt-plasticized shell material. The outer layer of the wire is used to obtain a preliminary shaped development line.

The cooling water tank 16 is configured to cool a preliminary formed development line, and the outer diameter control feedback device 17 is configured to measure an outer diameter of the X-ray development line of the composite structure, and feed the obtained parameter to the controller to make the controller Based on the feedback data, the extrusion speed of the single screw extruder 15 or the rotational speed of the traction device 18 is adjusted. In the present embodiment, the outer diameter control feedback device 17 can be implemented by using a suitable outer diameter measuring and controlling instrument, and the outer diameter measuring and controlling instrument can control the extrusion speed of the single screw extruder 15 to increase or decrease the extrusion amount according to the outer diameter of the developing line. Or control the rotational speed of the traction device 18 to obtain an outer diameter of a suitable size.

Next, a method of producing an X-ray developing line of a core-shell composite structure realized by applying the production apparatus 100 shown in Fig. 1 described above will be described in detail. 2 is a schematic flowchart of a method for manufacturing an X-ray development line of a core-shell composite structure according to an embodiment of the present application. As shown in FIG. 2, the method 200 includes:

Step 21: The shell material is placed in an extruder hopper and dried to a moisture content of less than 0.2%, and a drying temperature of 85-90 ° C; wherein the extrusion temperature of the extruder barrel is set to 165-210 ° C.

In the present embodiment, the material for the shell layer may be added with modified barium sulfate, cerium oxide (for example, Bi ₂ O ₃ ) or metal tungsten (W) from the modified thermoplastic elastomer (TPU, TPE).

Wherein, the weight content of barium sulfate, barium oxide or metal tungsten in the modified thermoplastic elastomer is 30-80%; the particle size of barium sulfate, barium oxide or metal tungsten powder is from 0.01 μm to 100 μm, preferably the average particle diameter. It is from 1 μm to 15 μm.

Step 22: Place the core wire on the core wire pay-off device to perform the pay-off, and straighten the core wire under the tension control device.

In this embodiment, the core wire may have various forms, for example, a tow composed of a single filament, a single long yarn, a plurality of filaments or a plurality of long yarns, and a double strand composed of a yarn/yarn. , multiple strands or retracement lines. Wherein, the cross-sectional shape of the core wire may be a circle, an ellipse or other suitable irregular shape.

Step 23. The shell material extruded through the head of the single-screw extruder is melt-plasticized and then coated on the outer layer of the core wire to obtain a preliminary formed X-ray developing line having a composite structure.

In this step, the core material can be synchronously extruded as a lead and the outer layer after the preheating of the pay-off wire.

Step 24: The initially formed X-ray developing line is further cooled by a cooling water tank.

Step 25. The outer diameter control feedback device controls the outer diameter of the X-ray developing line to be satisfactory. Specifically, the outer diameter control feedback device first measures the outer diameter of the X-ray development line, and feeds the obtained parameter to the controller to adjust the extrusion speed of the single screw extruder or the rotation speed of the traction device according to the feedback data. The outer diameter of the obtained X-ray developing line is made satisfactory. For example, when the outer diameter of the developing line is excessively large, the outer diameter control feedback device 17 feeds back to the controller, and the controller control can control the reduction of the extrusion speed of the single screw extruder 15 to reduce the amount of extrusion, and control Or controlling the rotational speed of the traction device 18 to increase the outer diameter of the composite developing line; when the outer diameter of the developing line is too small, the outer diameter control feedback device 17 feeds back to the controller, and the controller can control the single screw extruder 15 The extrusion speed is increased to increase the amount of the feed, and the controller or the speed of the traction device 18 is controlled to decrease, so that the outer diameter of the composite development line is increased.

Step 26, winding the obtained development line.

In the X-ray developing line having the composite structure obtained above, the high strength of the core material is used to ensure the strength of the entire X-ray developing line, and the elasticity of the material is reduced to be woven into the gauze or otherwise combined with the gauze. When it does not break, and the outer diameter does not become small due to elongation. Further, under the strength of the core material, the traction of the traction device can be used in the production process, and the rapid extrusion of the X-ray development line can be realized.

It should be noted that the cross section of the X-ray developing line having the core-shell composite structure prepared in the present embodiment may be any shape that facilitates extrusion molding, and may be, for example, a circular shape, an elliptical shape or other irregular shapes.

Wherein, the X-ray developing line with the composite structure obtained by the above method can be specifically obtained by using the following shell material and core material:

The core material may specifically be one or more of the following materials: cotton fiber, viscose fiber, acetate fiber, copper ammonia fiber, polyester (polyester) fiber, polypropylene fiber, polyvinyl acetal (Vinyl) Fiber, polyacrylonitrile fiber (acrylic fiber), nylon fiber, the material fiber provided above has high tensile strength because it can be used as a core material to increase the strength of the X-ray developing line.

The shell material is mainly composed of a mixture of: in a modified thermoplastic polyurethane elastomer rubber (TPU) or a modified thermoplastic elastomer (TPE), barium sulfate (BaSO ₄ ), barium oxide (for example, Bi ₂ O ₃ ) is added. Or a mixture of metal tungsten (W). In some embodiments, a mixture of barium sulfate (BaSO ₄ ), cerium oxide (eg, Bi ₂ O ₃ ), and metal tungsten powder (W) may also be added.

Hereinafter, the shell material used in the embodiment of the present application and a preparation method thereof will be described in detail in conjunction with the corresponding specific embodiments.

1. Preparation method of shell material based on hydrogenated styrene-butadiene-styrene block copolymer thermoplastic elastomer blending material:

1) The hydrogenated styrene-butadiene-styrene block copolymer having a weight percentage of 12.5% by weight of the shell material is mixed with 12.5% of the rubber filling oil and sufficiently absorbed to obtain a first rubber oil filled SEBS (shell layer) 25% of the total weight of the material);

2) mixing the above first rubber oil-filled SEBS with the following auxiliary agent and X-ray detector, and uniformly mixing and extruding at 165-180 ° C using a twin-screw extruder; The composition and content of the agent and X-ray detector in the total weight of the shell material are shown in the following table:

3) Cooling and granulation to obtain a TPE blended shell material.

Wherein, the X-ray detector added in the TPE blended shell material is composed of barium sulfate (BaSO ₄ ), bismuth oxide (Bi ₂ O ₃ ) or metal tungsten powder (W).

2. Preparation method of shell material based on thermoplastic polyurethane elastomer (TPU) blending material:

1) The hydrogenated styrene-butadiene-styrene block copolymer, which is 5% by weight based on the total weight of the shell material, is mixed with 5% of the rubber filling oil and sufficiently absorbed to obtain a second rubber oil filled SEBS (shell layer) 10% of the total weight of the material);

2) mixing the second rubber oil-filled SEBS with the following materials, auxiliary agents, and X-ray-detecting materials, and uniformly mixing and extruding at 165-180 ° C using a twin-screw extruder;

The components and contents of the above additives are shown in the following table by weight:

3) Cooling and granulating to obtain a TPU blended shell material.

The X-ray detector added to the TPU blended shell material comprises: barium sulfate (BaSO ₄ ), bismuth oxide (Bi ₂ O ₃ ), and metal tungsten (W).

The TPE blended shell material and the TPU blended shell material can be combined with a plurality of different core wires to continuously produce corresponding X-ray development lines by screw extrusion. In order to secure the performance of the developing line, the cross-sectional area of the shell having the developing function in the X-ray developing line having the composite structure should be more than 3/4 of the total cross-sectional area of the developing line. Wherein, the X-ray development line of the core-shell composite structure may have a circular cross section, or may be an elliptical shape or any other shape that facilitates extrusion molding.

The following provides a specific embodiment in which a plurality of different core wires and the TPE blended shell material and the TPU blended shell material provided in the above embodiments are combined to form a corresponding X-ray developing line.

Example 1:

The inner mold in the extruder head is set as a solid core rod, and then the TPE blended shell material obtained by the preparation method of the above embodiment is directly used as a developing material, and the production line of the X-ray developing line is used to produce a wire diameter of A solid development line of 0.70 mm.

Example 2:

The inner mold in the extruder head uses a cotton thread as a core wire, the diameter of the cotton thread is 0.32 mm, and the cotton thread has a structural specification of 210 D/3. Then, using the TPE blended shell material obtained by the preparation method of the above embodiment as a developing material, using a production facility of an X-ray developing line, a developing line of a composite structure having a wire diameter of 0.70 mm is extruded, and the core wire accounts for the total development line. The cross-sectional area is 20.9%.

Example 3:

The inner mold in the extruder head uses a polyester thread as the core, the diameter of the polyester thread is 0.25 mm, and the structural specification of the polyester thread is 150 D/3. Then, using the TPE blended shell material obtained by the preparation method of the above embodiment as a developing material, using a production facility of an X-ray developing line, a developing line of a composite structure having a wire diameter of 0.70 mm is extruded, and the core wire accounts for the total development line. 12.8% of the cross-sectional area.

Example 4:

The inner mold in the extruder head is set as a solid core rod, and then the TPU blended shell material obtained by the preparation method of the above embodiment is directly used as a developing material, and the production line of the X-ray developing line is used to produce a wire diameter of A solid development line of 0.70 mm.

Example 5:

The inner mold in the extruder head uses a viscose fiber thread as a core, the viscose fiber thread has a diameter of 0.28 mm, and the viscose fiber has a structural specification of 250D/2. Then, using the TPU blended shell material obtained by the preparation method of the above embodiment as a developing material, using a production facility of an X-ray developing line, a developing line of a composite structure having a wire diameter of 0.70 mm is extruded, and the core wire accounts for the total development line. 16.0% of the cross-sectional area.

Example 6

The inner mold in the extruder head uses a nylon thread as a core wire, the nylon wire has a diameter of 0.23 mm, and the nylon wire has a structural specification of 120 D/3. Then, using the TPU blended shell material obtained by the preparation method of the above embodiment as a developing material, using a production facility of an X-ray developing line, a developing line of a composite structure having a wire diameter of 0.70 mm is extruded, and the core wire accounts for the total development line. 10.8% of the cross-sectional area.

In order to further verify the technical effects of the development line of the composite structure provided by the development line manufacturing method provided by the embodiment of the present application, the development lines produced in Examples 1-6 were sampled and subjected to corresponding performance tests. The specific performance test results are as follows:

From the comparison of Examples 1-3, and the comparison of Examples 4-6, it is known that the hardness, the outer diameter of the developing line, and the gram weight are not much different, and the ratio of the core area to the total cross-sectional area of the developing line is not more than 21 In the case of %, the tensile breaking force (the tensile breaking force is positively correlated with the tensile strength) and the tensile modulus of the developing wire having the core-shell composite structure are compared with the conventional one-component developing line. At the same time as the large lifting, the appearance and development effect are basically not affected.

Among them, the tensile breaking force is increased to 3 to 6 times, and the increase of the tensile breaking force indicates that the developing line having the core-shell composite structure is not easily broken under the action of an external force. The tensile modulus is roughly increased from 9 times to 45 times. The increase of the tensile modulus indicates that the developing wire has a greatly enhanced ability to resist external force tensile deformation, that is, the developing line having the core material is not easily affected by external force. Stretched and thinned. The above-mentioned improvement of the tensile breaking force and the tensile modulus overcomes the disadvantage that the existing single structural material is insufficient in strength and is easily stretched or even broken during use.

Further, according to the comparison of Example 2 and Example 3, it can be seen that when different types of core wires are used, the development line tensile strength and tensile modulus and development function obtained in the final production are also affected. It can be seen that the composite developing line using the polyester thread has a higher tensile breaking force than when the cotton thread is used as the core wire, and the polyester yarn is used as the polyester yarn in the polyester thread as the total cross-sectional area of the developing line is smaller. When the core wire is used, it has a larger shell cross-sectional area (the larger the cross-sectional area of the shell layer, the higher the cross-sectional area of the effective developing function, and the better the developing function).

In Examples 5 and 6, the tensile core breaking force and the tensile initial modulus are also significantly increased compared to the one-component developing line, and the smaller core cross-sectional area is compared with the examples 2 and 3. That is, having a larger shell cross-sectional area, the higher the cross-sectional area of the effective developing function.

The above description is only the embodiment of the present application, and thus does not limit the scope of the patent application, and the equivalent structure or equivalent process transformation of the specification and the drawings of the present application, or directly or indirectly applied to other related technologies. The fields are all included in the scope of patent protection of this application.

Claims

An X-ray developing line, characterized in that it is composed of a shell layer and a core wire, the shell layer is coated outside the core wire, and the shell layer is made of a shell material;

The shell material is composed of a modified thermoplastic elastomer and a developer; the developer includes one or more of barium sulfate, barium oxide or metal tungsten.
The X-ray developing line according to claim 1, wherein the core wire is a cotton thread, the core wire has a diameter of 0.32 mm; and the modified thermoplastic elastomer is a TPE.
The X-ray developing line according to claim 1, wherein the core wire is a polyester thread, the core wire has a diameter of 0.25 mm; and the modified thermoplastic elastomer is a TPE.
The X-ray developing line according to claim 1, wherein the core wire is a viscose fiber thread, the core wire has a diameter of 0.28 mm; and the modified thermoplastic elastomer is a thermoplastic polyurethane elastomer.
The X-ray developing line according to claim 1, wherein the core wire is a nylon fiber thread, the core wire has a diameter of 0.23 mm; and the modified thermoplastic elastomer is a thermoplastic polyurethane elastomer.
The X-ray developing line according to claim 2 or 3, wherein the shell material is composed of the following materials in terms of weight percentage:

The compound is tetrakis[β-(3,5-di-tert-butyl 4-hydroxyphenyl)propionic acid] pentaerythritol ester and dilauryl thiotripropionate compounded in a 1:1 ratio.
The X-ray developing line according to claim 4 or 5, wherein the shell material is composed of the following materials in terms of weight percentage:

The compound is tetrakis[β-(3,5-di-tert-butyl 4-hydroxyphenyl)propionic acid] pentaerythritol ester and dilauryl thiotripropionate compounded in a 1:1 ratio.
The X-ray developing line according to claim 1, wherein in the cross section of the X-ray developing line, an area ratio of a shell layer and a core line of the X-ray developing line is greater than or equal to 3.
A method for producing an X-ray developing line, comprising:

Pretreating the shell material of any of claims 1-8 and placing the shell material in a hopper of the extruder;

Straightening the core wire and passing through the head of the extruder;

Passing the shell material through the extruder to melt and coat the core wire;

The X-ray developing line was obtained after cooling.
The production method according to claim 9, wherein the method further comprises:

Detecting an outer diameter of the X-ray developing line;

The rotation speed of the extruder is adjusted according to the outer diameter.
An apparatus for producing an X-ray developing line, comprising: a core wire paying device, a core wire drawing machine, a tension control device, a core wire feeder, a single screw extruder, a cooling water tank, Traction device and winding device;

The core wire payout device is configured to output a core wire at a predetermined speed;

The core wire passes through the core wire drawing machine and the core wire feeder in succession, and the tension control device is disposed between the core wire drawing machine and the core wire feeder for maintaining The core wire is straightened and maintains a certain tension;

The single-screw extruder for melting the shell material and extruding the melted shell material from the head of the single-screw extruder to coat the outer layer of the core;

The cooling water tank is connected to the screw extruder for cooling an X-ray developing shell layer which is output from the single-screw extruder head and covered on the outer layer of the core wire;

The traction device is connected to the other end of the cooling water tank for pulling the X-ray development line;

The winding device is used to collect a core-shell composite composite developing material coated with a shell layer into a roll.
The apparatus of claim 11 further comprising an outer diameter control feedback device;

The outer diameter control feedback device is disposed between the cooling water tank and the traction device for detecting an outer diameter of the X-ray development line outputted through the cooling water tank;

The outer diameter control feedback device is further electrically connected to the single screw extruder or the traction device for adjusting the extrusion speed of the single screw extruder or the traction device according to the outer diameter feedback Speed.