CN113183435A - Medical conjoined casing wire rod without tearing mark and preparation method thereof - Google Patents
Medical conjoined casing wire rod without tearing mark and preparation method thereof Download PDFInfo
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- CN113183435A CN113183435A CN202110270913.5A CN202110270913A CN113183435A CN 113183435 A CN113183435 A CN 113183435A CN 202110270913 A CN202110270913 A CN 202110270913A CN 113183435 A CN113183435 A CN 113183435A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0021—Combinations of extrusion moulding with other shaping operations combined with joining, lining or laminating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/885—External treatment, e.g. by using air rings for cooling tubular films
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/753—Medical equipment; Accessories therefor
Abstract
The invention discloses a medical conjoined casing wire rod without tearing marks and a preparation method thereof, wherein the method comprises the following steps: the sleeve and the electric wire tube are respectively molded in an extruder, then the surfaces of the sleeve and the electric wire tube are contacted at an outlet, the sleeve and the electric wire tube are heated at constant temperature for the second time, and then the medical conjoined sleeve wire without tearing marks is obtained after cooling and shaping. The sleeve wire rod is torn without the situations of chemical glue residue and unsmooth surface skin, so that the damage to human soft tissues after the sleeve wire rod is contacted with a human body is avoided, and the safety performance is improved.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a medical conjoined casing wire rod without tearing marks and a preparation method thereof.
Background
The colonoscope is an elongated flexible medical instrument approximately 1 CM in diameter and 140CM in length, and is terminated by a fiber tube with a light source and a miniature electronic camera. The colonoscope passes through the anus and into the rectum to the large intestine, allowing the physician to view the colon and the interior of the large intestine. Colonoscopy is a diagnostic modality used by physicians to examine lesions in the large intestine and colon.
The large intestine mirror tube is composed of two tubes, one is an inflation tube (also called a sleeve tube), and the other is a wire tube. The inflation tube is used for filling air in the intestinal tract during the examination process to provide an operation visual field for a doctor. The electric wire pipe is used for connecting the electronic camera. The existing colonoscopy tube is generally formed by bonding two tubes by glue or integrally extruding, when in use, the tops of the two tubes which are combined together need to be torn apart, glue residue exists at the torn part or the surface of the torn part has bulges, and the enteroscopy tube possibly has the risk of scratching the body after entering the body.
Disclosure of Invention
In order to overcome the defects of the prior art, one of the purposes of the invention is to provide a preparation method of a medical conjoined casing wire rod without tearing marks, wherein a wire tube and a casing are extruded and molded respectively, then the surfaces of the wire tube and the casing are self-adhered by secondary constant temperature heating at 180-250 ℃, and then the wire tube and the casing are cooled and shaped; the invention also aims to provide a medical conjoined casing wire material without a tear mark, after two electric wire tubes and a casing which are combined together are torn, the surface of the torn part is smooth, and the human tissue can not be damaged after the electric wire tubes and the casing are contacted with a human body.
One of the purposes of the invention is realized by adopting the following technical scheme:
a preparation method of a medical conjoined casing wire rod without tearing marks comprises the following steps:
1) respectively putting raw materials for the sleeve and raw materials for the electric wire tube into an extruder, heating, melting, extruding and forming, and then respectively forming the sleeve and the electric wire tube through a die;
2) at the moment that the sleeve and the wire tube obtained in the step 1) leave the die, after the surfaces of the sleeve and the wire tube are contacted, constant-temperature heating is carried out, the surfaces of the sleeve and the wire tube are uniformly heated at constant temperature and constant speed so that the surfaces of the sleeve and the wire tube are self-adhered, and then the medical conjoined sleeve wire without tearing marks is obtained after cooling and shaping.
3) Respectively putting raw materials for the sleeve and raw materials for the wire tube into an extruder, heating, melting, extruding and forming, and forming at 160-230 ℃ through a die to form the sleeve and the wire tube;
4) and (2) contacting the surfaces of the sleeve and the wire pipe at the moment that the sleeve and the wire pipe obtained in the step 1) leave the die, then carrying out secondary constant-temperature heating at 180-250 ℃, enabling the skin layers of the sleeve and the wire pipe to be fully heated and softened and adhered together under the condition of 180-250 ℃, and cooling and shaping the sleeve and the wire pipe through constant-temperature refrigeration equipment to obtain the medical integral sleeve wire without tearing marks.
Specifically, the cooling temperature needs to be related to the production speed and the size of the outer diameter of the sleeve and the wire tube, and the cooling temperature is lower when the production speed is higher or the outer diameter is larger, and is generally 8-30 ℃.
Further, in the step 1), the sleeve and the wire tube are made of the same material.
Still further, in step 1), the raw materials used for the sleeve and the raw materials used for the wire tube are both polyvinyl chloride or medical thermoplastic elastomer without phthalate.
Further, in the step 1), an insulating layer is arranged outside the wire tube, and a conductor is arranged inside the wire tube.
Further, in the step 1), the heating time is 5-10 min.
Further, in the step 2), the time for secondary constant-temperature heating is 2-5 min.
Still further, in step 2), the heating device is an infrared heater.
Further, in the step 2), the temperature of the cooling medium is 8-30 ℃, and the cooling and shaping time is 5-60 s.
And further, in the step 2), cooling and shaping by using cooling water.
The second purpose of the invention is realized by adopting the following technical scheme:
the medical conjoined casing wire rod without tearing marks is prepared by the preparation method of the medical conjoined casing wire rod without tearing marks.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention abandons the traditional method of bonding the sleeve and the wire tube by glue and integrally forming the sleeve and the wire tube, adopts the steps of respectively extruding and forming the sleeve and the wire tube, and then carrying out secondary heating to ensure that the surfaces of the sleeve and the wire tube reach 95-98% of bonding critical points so as to carry out self-adhesion, and obtains the medical connecting sleeve wire material without tearing marks by limiting the temperature of a mould to be 160-230 ℃ and carrying out secondary constant temperature heating on the sleeve and the wire tube under the condition of 180-250 ℃, so that the medical connecting sleeve wire material without tearing marks can not be left by chemical glue after being torn, and the situations that the surface has no bulge or burr can not occur, the soft tissues of a human body are prevented from being damaged after being contacted with the human body, and the safety performance is improved. The temperature of the secondary constant-temperature heating is very critical, if the temperature is lower than the melting point of the sheath layer of the wire tube and the sleeve, the sheath layer is easy to self-crack if the sheath layer is not fully bonded; on the contrary, the deformation of the wire tube and the conduit can be rejected due to the over-high temperature, and after repeated tests, the sleeve and the wire tube can not deform and self-crack until the bonding point of 95-98 percent is reached. The bond point is the degree of adhesion of the sleeve to the wire tube, and a 95% bond point means that 95% of the surface layers of the sleeve and the wire tube are in contact with each other.
(2) The sleeve and the surface of the electric wire tube of the medical connecting sleeve wire rod without the tearing marks are made of the same medical material, the surface is smooth after the sleeve is torn, and the human body cannot be damaged after the contact.
Drawings
FIG. 1 is a schematic view of example 1 when it is not torn;
FIG. 2 is a sectional view of embodiment 1;
FIG. 3 is a schematic view of example 1 when torn;
FIG. 4 is a schematic view of example 2 when it is not torn;
FIG. 5 is a sectional view of embodiment 2;
FIG. 6 is a schematic view of example 2 when torn;
in the figure: 1. a wire tube; 11. a first insulating layer; 12. a sheath; 13. a conductor; 2. a sleeve; 21. a second insulating layer.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
Example 1
A preparation method of a medical conjoined casing wire rod without tearing marks comprises the following steps:
1) respectively putting the raw materials for the sleeve 2 and the electric wire tube 1 into two extruders, heating at 170 ℃ for 8min for melting, extruding and molding, and then respectively forming the sleeve 2 and the electric wire tube 1 through a die;
2) and (2) entering an infrared heater at the moment that the sleeve 2 and the wire tube 1 obtained in the step 1) leave the die, contacting the surfaces of the sleeve 2 and the wire tube 1, then heating at a constant temperature of 180 ℃, uniformly heating the surfaces of the sleeve 2 and the wire tube 1 at a constant temperature and a constant speed to enable the surfaces of the sleeve 2 and the wire tube 1 to be self-adhered, and cooling by cooling water at 8 ℃ for 30 seconds for shaping to obtain the medical conjoined sleeve wire material without tearing marks as shown in figure 1.
In the step 1), the raw materials used for the sleeve 2 and the electric wire pipe 1 are polyvinyl chloride (PVC) without phthalate. Phthalate is a plasticizer, and is a functional polymer material aid used for increasing ductility, elasticity and softness. If the container or package contacted with human body contains a large amount of plasticizer, the plasticizer may be migrated from the container or package into human body, which causes the decrease of immunity and reproductive ability, and even causes the risk of carcinogenesis after a large amount of plasticizer is taken for a long time. Therefore, medical polyvinyl chloride (PVC) containing no dipotassium phthalate was used in example 1. PVC is hot melt adhesive, and the crust of sleeve pipe 2 and electric wire tube 1 chooses for use PVC, can bond each other.
Further, in step 1), as shown in fig. 2, the core wires inside the conduit 1 are multi-core wires, each core wire is provided with a conductor 13, the outside of each core wire is provided with a first insulating layer 11, and a sheath 12 is further provided inside the conduit 1 to wrap the multi-core wires. The second insulating layer 21 is provided outside the casing 2, and the inside is a hollow structure.
As shown in fig. 3, after the sleeve 2 and the wire conduit 1 are torn, the situations of chemical glue residue and unsmooth surface skin can not occur, the damage to human soft tissues after the sleeve is contacted with a human body can be avoided, and the safety performance is improved.
The medical conjoined cannula wire of the present embodiment that tears traceless is used in a colonoscope. The colorectal cancer is a common gastrointestinal tumor disease, mainly means malignant lesion of the mucosa epithelium of the large intestine under the action of carcinogenic factors such as heredity or environment, and symptoms such as anemia, emaciation, incomplete intestinal obstruction, diarrhea, abdominal distension and the like, and early diagnosis, early discovery and normative surgical treatment are key points for improving the clinical treatment of the colorectal cancer. Colonoscopy is a common diagnosis mode for colorectal cancer, and the detection method has the characteristics of thoroughness, intuition and clearness, can detect the whole colon diseases, can assist treatment of precancerous lesions such as adenoma and polyp, can detect the tumor position, the shape and the size by using the colonoscopy, and can perform pathological detection and biopsy.
Example 2
A preparation method of a medical conjoined casing wire rod without tearing marks comprises the following steps:
1) respectively putting the raw materials used by the sleeve 2 and the raw materials used by the wire tube 1 into an extruder, heating and melting the raw materials at 225 ℃ for 5min, extruding and molding, and then respectively forming the sleeve 2 and the wire tube 1 through a die;
2) and (2) entering an infrared heater at the moment that the sleeve 2 and the wire tube 1 obtained in the step 1) leave the die, contacting the surfaces of the sleeve 2 and the wire tube 1, then heating at a constant temperature of 250 ℃, uniformly heating the surfaces of the sleeve 2 and the wire tube 1 at a constant temperature and a constant speed to enable the surfaces of the sleeve 2 and the wire tube 1 to be self-adhered, and cooling by cooling water at 30 ℃ for 5 seconds for shaping to obtain the medical conjoined sleeve wire material without tearing marks as shown in figure 4.
In the step 1), the raw materials used for the sleeve 2 and the raw materials used for the wire tube 1 are both medical thermoplastic elastomers (TPE). The thermoplastic elastomer is a novel high polymer material between rubber and resin, can replace part of rubber, and can modify plastics. The dual performance and wide characteristic of the thermoplastic elastomer, which is possessed by rubber and plastics, make it widely used in the rubber industry for manufacturing daily products such as rubber shoes and adhesive tapes, and various industrial products such as rubber tubes, adhesive tapes, rubber plates, rubber parts, adhesives and the like.
Further, in step 1), as shown in fig. 5, the wire conduit 1 of the present embodiment is a single core wire, the first insulating layer 11 is provided outside the wire conduit, and the conductor 13 is provided inside the wire conduit. The second insulating layer 21 is provided outside the casing 2, and the inside is a hollow structure.
As shown in fig. 6, after the sleeve 2 and the wire conduit 1 are torn, the situations of chemical glue residue and unsmooth surface skin can not occur, the damage to human soft tissues after the sleeve is contacted with a human body can be avoided, and the safety performance is improved.
Example 3
A preparation method of a medical conjoined casing wire rod without tearing marks comprises the following steps:
1) respectively putting the raw materials used by the sleeve 2 and the raw materials used by the wire tube 1 into two extruders, heating at 260 ℃ for 10min to melt, extruding and forming, and then respectively forming the sleeve 2 and the wire tube 1 through a die;
2) and (2) entering an infrared heater at the moment that the sleeve 2 and the wire tube 1 obtained in the step 1) leave the die, contacting the surfaces of the sleeve 2 and the wire tube 1, then heating at a constant temperature of 250 ℃, uniformly heating the surfaces of the sleeve 2 and the wire tube 1 at a constant temperature and a constant speed to enable the surfaces of the sleeve 2 and the wire tube 1 to be self-adhered, cooling by cooling water at 30 ℃ for 5s to 30 ℃ for shaping, and obtaining the medical conjoined sleeve wire material without tearing and marks as shown in figure 1.
In the step 1), the raw materials used for the sleeve 2 and the electric wire pipe 1 are polyvinyl chloride (PVC) without phthalate. Phthalate is a plasticizer, and is a functional polymer material aid used for increasing ductility, elasticity and softness. If the container or package contacted with human body contains a large amount of plasticizer, the plasticizer may be migrated from the container or package into human body, which causes the decrease of immunity and reproductive ability, and even causes the risk of carcinogenesis after a large amount of plasticizer is taken for a long time. Therefore, medical polyvinyl chloride (PVC) containing no dipotassium phthalate was used in example 1.
Further, in step 1), as shown in fig. 2, the core wires inside the conduit 1 are multi-core wires, each core wire is provided with a conductor 13, the outside of each core wire is provided with a first insulating layer 11, and a sheath 12 is further provided inside the conduit 1 to wrap the multi-core wires. The second insulating layer 21 is provided outside the casing 2, and the inside is a hollow structure.
As shown in fig. 3, after the sleeve 2 and the wire conduit 1 are torn, the situations of chemical glue residue and unsmooth surface skin can not occur, the damage to human soft tissues after the sleeve is contacted with a human body can be avoided, and the safety performance is improved.
Example 4
A preparation method of a medical conjoined casing wire rod without tearing marks comprises the following steps:
1) respectively putting raw materials used by the sleeve 2 and raw materials used by the wire tube 1 into an extruder, heating and melting at 170 ℃, extruding and forming, and then respectively forming the sleeve 2 and the wire tube 1 through a die;
2) and (2) entering an infrared heater at the moment that the sleeve 2 and the wire tube 1 obtained in the step 1) leave the die, contacting the surfaces of the sleeve 2 and the wire tube 1, then heating at a constant temperature of 180 ℃, uniformly heating the surfaces of the sleeve 2 and the wire tube 1 at a constant temperature and a constant speed to enable the surfaces of the sleeve 2 and the wire tube 1 to be self-adhered, cooling to 8 ℃ by cooling water, and shaping to obtain the medical integral sleeve wire material without tearing marks as shown in the figure 4.
In the step 1), the raw materials used for the sleeve 2 and the raw materials used for the wire tube 1 are both medical thermoplastic elastomers (TPE). The thermoplastic elastomer is a novel high polymer material between rubber and resin, can replace part of rubber, and can modify plastics. The dual performance and wide characteristic of the thermoplastic elastomer, which is possessed by rubber and plastics, make it widely used in the rubber industry for manufacturing daily products such as rubber shoes and adhesive tapes, and various industrial products such as rubber tubes, adhesive tapes, rubber plates, rubber parts, adhesives and the like.
Further, in step 1), as shown in fig. 5, the wire conduit 1 of the present embodiment is a single core wire, the first insulating layer 11 is provided outside the wire conduit, and the conductor 13 is provided inside the wire conduit. The second insulating layer 21 is provided outside the casing 2, and the inside is a hollow structure.
As shown in fig. 6, after the sleeve 2 and the wire conduit 1 are torn, the situations of chemical glue residue and unsmooth surface skin can not occur, the damage to human soft tissues after the sleeve is contacted with a human body can be avoided, and the safety performance is improved.
Comparative example 1
Comparative example 1 differs from example 1 in that: the second isothermal heating was carried out at 170 ℃ and the remaining steps and components were the same as in example 1.
Comparative example 2
Comparative example 1 differs from example 1 in that: the second isothermal heating was carried out at 270 ℃ and the remaining steps and components were the same as in example 1.
Performance testing
The conjoined sleeve wires of example 1 and comparative examples 1-2 were torn apart from the sleeve and the wire duct with the same force, and the condition of the torn surface was visually observed as shown in the following table.
TABLE 1 situation after tearing and separating of conjoined sleeve wire of example 1 and comparative examples 1-2
As shown in Table 1, the temperature of the secondary constant temperature heating of comparative examples 1 and 2 is not between 180 and 250 ℃ defined in the application, and the surface layers of the wire pipe and the sleeve cannot be sufficiently bonded because the temperature of the secondary constant temperature heating of comparative example 1 is too low to reach the melting point of the surface layers of the wire pipe and the sleeve; comparative example 2 because the secondary constant temperature heating temperature is too high, the laminating has been melted completely between electric wire tube and the sleeve pipe cortex, has led to the cortex of two pipes simultaneously to warp, influences the smoothness degree of tearing the face. The conjoined sleeve wire of the embodiment 1 is not deformed and does not self-crack, although the bonding degree is high, the tearing surface has no burr and bulge after being torn.
In the above embodiments, each material is not limited to the above components, and each material may also be composed of other single components or multiple components described in the present invention, and the component parts of each material are not limited to the above parts, and the component parts of each material may also be a combination of other component parts described in the present invention, and are not described herein again.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A preparation method of a medical conjoined casing wire rod without tearing marks is characterized by comprising the following steps:
1) respectively putting raw materials for the sleeve and raw materials for the wire tube into an extruder, heating, melting, extruding and forming, and forming at 160-230 ℃ through a die to form the sleeve and the wire tube;
2) and (2) contacting the surfaces of the sleeve and the electric wire pipe at the moment when the sleeve and the electric wire pipe obtained in the step 1) leave the die, then carrying out secondary constant-temperature heating at 180-250 ℃, and then carrying out constant-temperature cooling and shaping to obtain the medical connecting sleeve wire without tearing marks.
2. The method for preparing the medical integral sleeve wire without the tear marks according to claim 1, wherein in the step 1), the sleeve and the wire tube are made of the same material.
3. The method for preparing the medical conjoined casing wire without tearing marks according to claim 1, wherein in the step 1), the raw materials used by the casing and the raw materials used by the electric wire tube are both polyvinyl chloride or medical thermoplastic elastomer without phthalate potassium.
4. The method for preparing a medical conjoined casing wire without a tear according to claim 1, wherein in the step 1), the outer part of the wire tube is an insulating layer, and the inner part of the wire tube is provided with a conductor.
5. The method for preparing the medical connecting sleeve wire without the tear marks according to claim 1, wherein in the step 1), the heating time is 5-10 min.
6. The method for preparing the medical connecting sleeve wire without the tear marks according to claim 1, wherein in the step 2), the time of secondary constant-temperature heating is 2-5 min.
7. The method for preparing a medical connecting sleeve wire without a tear according to claim 1, wherein in the step 2), the heating device is an infrared heater.
8. The method for preparing the medical connecting sleeve wire rod without the tear marks according to claim 1, wherein in the step 2), the temperature of a cooling medium is 8-30 ℃, and the cooling and shaping time is 5-60 s.
9. The method for preparing the medical connecting sleeve wire without the tear mark according to claim 1, wherein in the step 2), cooling and shaping are carried out by cooling water.
10. The medical conjoined casing wire rod without tearing marks is characterized by being prepared by the preparation method of the medical conjoined casing wire rod without tearing marks according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110270913.5A CN113183435A (en) | 2021-03-12 | 2021-03-12 | Medical conjoined casing wire rod without tearing mark and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110270913.5A CN113183435A (en) | 2021-03-12 | 2021-03-12 | Medical conjoined casing wire rod without tearing mark and preparation method thereof |
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| CN113183435A true CN113183435A (en) | 2021-07-30 |
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| CN202110270913.5A Pending CN113183435A (en) | 2021-03-12 | 2021-03-12 | Medical conjoined casing wire rod without tearing mark and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100191165A1 (en) * | 2009-01-29 | 2010-07-29 | Angiodynamics, Inc. | Multilumen Catheters and Method of Manufacturing |
| CN106361388A (en) * | 2016-11-02 | 2017-02-01 | 张立军 | Endoscope sheath probe tube and manufacturing method thereof |
-
2021
- 2021-03-12 CN CN202110270913.5A patent/CN113183435A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100191165A1 (en) * | 2009-01-29 | 2010-07-29 | Angiodynamics, Inc. | Multilumen Catheters and Method of Manufacturing |
| CN106361388A (en) * | 2016-11-02 | 2017-02-01 | 张立军 | Endoscope sheath probe tube and manufacturing method thereof |
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Address after: 523000 unit 3, building 3, headquarters of Lihe Bauhinia scientific innovation center, No. 55, Qinghu East Road, Qingxi Town, Dongguan City, Guangdong Province Applicant after: DONGGUAN CAIXUAN OPTOELECTRONICS TECHNOLOGY Co.,Ltd. Address before: 523000 floor 1, building B, No. 20, Xingwang street, Xiwang Industrial Zone, tiantangwei village, Fenggang town, Dongguan City, Guangdong Province Applicant before: DONGGUAN CAIXUAN OPTOELECTRONICS TECHNOLOGY Co.,Ltd. |
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