Formula and preparation method of modified silica gel catheter

Abstract

The preparation method comprises the following steps: S1, mixing copper-silver antibacterial white carbon black, raw silica gel, a vulcanizing agent and an auxiliary agent, putting the mixture into a rubber mixing mill, adding polytetrafluoroethylene for mixing, and pressing into layers of silica gel extruded materials with uniform thickness; s2, manufacturing and winding a semi-finished silica gel catheter; s3, putting the wound silica gel catheter into an oven, and vulcanizing to remove peculiar smell on the silica gel catheter, the viscosity of the silica gel surface can be effectively removed, the lubricity is improved, compared with a traditional coating process, the operation time is greatly shortened, the cost is reduced, and meanwhile the risk that a coating falls off in a blood vessel to form thrombus is effectively avoided.

Description

Technical Field

[0001] The invention relates to the technical field of silicone catheters, and in particular to a modified silicone catheter formula and a preparation method. Background Art

[0002] The surface of the series of products made of silicone is sticky, so dust and other pollutants are easily attached to the surface of the product, which not only affects the appearance, but also the stickiness of the product surface may even cause inconvenience in terminal use and operation, thus affecting the normal function of the product.

[0003] Deficiencies of existing technology:

[0004] At present, the method to improve the surface viscosity of silicone products is generally to do some coating treatment on the surface of the product to achieve the purpose of removing surface viscosity. However, this method has the following disadvantages: the surface coating falls off during use, affecting the effect of removing viscosity; during the use of catheter products, the coating falls off into the blood vessels, causing thrombosis, which is life-threatening in severe cases. Summary of the invention

[0005] The purpose of the present invention is to provide a modified silicone catheter formula and preparation method to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a modified silicone catheter formula, characterized in that the silicone catheter ingredients include copper-silver antibacterial white carbon black, raw silicone, a vulcanizing agent and an additive.

[0007] The present invention also provides a method for preparing a modified silicone catheter, which specifically comprises the following steps:

[0008] S1, copper-silver antibacterial white carbon black, raw silica gel, vulcanizing agent and additives are mixed and put into a rubber mixer, polytetrafluoroethylene is added for mixing, and pressed into layers of silica gel extrusion material with uniform thickness;

[0009] S2, making and winding a semi-finished silicone catheter;

[0010] S3. Put the wound silicone tube into the oven for vulcanization to remove the odor on the silicone tube.

[0011] Preferably, in step S1, the content of tetrafluoroethylene is 8% to 30%.

[0012] Preferably, the step S2 specifically includes the following steps:

[0013] a1. Install the mold on the head of the silicone extruder;

[0014] a2. Cut the refined rubber into shapes of the same size and length, feed it through the silicone extruder, extrude it into silicone catheters, put the silicone catheters into an eight-meter-long drying tunnel, vulcanize it at high temperature, support the semi-finished silicone catheters, and wrap the semi-finished silicone catheters.

[0015] Preferably, the vulcanizing agent in step S1 may be a platinum vulcanizing agent or a di-tetra-vulcanizing agent material.

[0016] Preferably, in step a2, the heating temperature of the silicone catheter is set to 180 degrees and the heating time is set to 2 hours.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The modified silicone catheter formula and preparation method include S1, mixing copper-silver antibacterial white carbon black, raw silicone, a vulcanizing agent and an auxiliary agent into a rubber mixer, adding polytetrafluoroethylene for mixing, and pressing into layers of silicone extrudates with uniform thickness; S2, making and winding a semi-finished silicone catheter; S3, putting the wound silicone catheter into an oven for vulcanization to remove odor on the silicone catheter, which can effectively remove the stickiness of the silicone surface and increase lubricity, and compared with the traditional coating process, the operation time is greatly reduced, the cost is reduced, and the risk of the coating falling off in the blood vessel to form thrombus is also effectively avoided. DETAILED DESCRIPTION

[0019] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like, which indicate orientations or positional relationships, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0021] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "setting" should be understood in a broad sense, for example, it can be fixed connection, setting, or detachable connection, setting, or integrated connection, setting. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0023] Example 1

[0024] The invention provides a modified silicone catheter formula technical solution: the silicone catheter components include copper-silver antibacterial white carbon black, raw silicone, a vulcanizing agent and an auxiliary agent.

[0025] Example 2

[0026] The present invention provides a method for preparing a modified silicone catheter.

[0027] S1. Mix copper-silver antibacterial white carbon black, raw silica gel, vulcanizing agent and additives and put them into a rubber mixer, add polytetrafluoroethylene for mixing, set the polytetrafluoroethylene content to 8%, and press them into layers of silicone extrusion material with uniform thickness. The vulcanizing agent can be a platinum vulcanizing agent or a di-tetra-vulcanizing agent material;

[0028] S2, making and winding a semi-finished silicone catheter;

[0029] a1. Install the mold on the head of the silicone extruder;

[0030] a2. Cut the refined rubber into shapes of the same size and length, feed it through the silicone extruder, extrude it into a silicone tube, put the silicone tube into an eight-meter-long drying tunnel, vulcanize it at high temperature, support the semi-finished silicone tube, and wrap the semi-finished silicone tube. The heating temperature of the silicone tube is set to 180 degrees and the heating time is set to 2 hours;

[0031] S3. Put the wound silicone tube into the oven for vulcanization to remove the odor on the silicone tube.

[0032] Example 3

[0033] The present invention provides a method for preparing a modified silicone catheter.

[0034] S1. Mix copper-silver antibacterial white carbon black, raw silica gel, vulcanizing agent and additives and put them into a rubber mixer, add polytetrafluoroethylene for mixing, set the polytetrafluoroethylene content to 15%, and press them into layers of silicone extrusion material with uniform thickness. The vulcanizing agent can be platinum vulcanizing agent or di-tetra-vulcanizing agent material;

[0035] S2, making and winding a semi-finished silicone catheter;

[0036] a1. Install the mold on the head of the silicone extruder;

[0037] a2. Cut the refined rubber into shapes of the same size and length, feed it through the silicone extruder, extrude it into a silicone tube, put the silicone tube into an eight-meter-long drying tunnel, vulcanize it at high temperature, support the semi-finished silicone tube, and wrap the semi-finished silicone tube. The heating temperature of the silicone tube is set to 180 degrees and the heating time is set to 2 hours;

[0038] S3. Put the wound silicone tube into the oven for vulcanization to remove the odor on the silicone tube.

[0039] Example 4

[0040] The present invention provides a method for preparing a modified silicone catheter.

[0041] S1. Mix copper-silver antibacterial white carbon black, raw silica gel, vulcanizing agent and additives and put them into a rubber mixer, add polytetrafluoroethylene for mixing, set the polytetrafluoroethylene content to 30%, and press them into layers of uniform thickness of silicone extrusion material. The vulcanizing agent can be platinum vulcanizing agent or di-tetra-vulcanizing agent material;

[0042] S2, making and winding a semi-finished silicone catheter;

[0043] a1. Install the mold on the head of the silicone extruder;

[0044] a2. Cut the refined rubber into shapes of the same size and length, feed it through the silicone extruder, extrude it into a silicone tube, put the silicone tube into an eight-meter-long drying tunnel, vulcanize it at high temperature, support the semi-finished silicone tube, and wrap the semi-finished silicone tube. The heating temperature of the silicone tube is set to 180 degrees and the heating time is set to 2 hours;

[0045] S3. Put the wound silicone tube into the oven for vulcanization to remove the odor on the silicone tube.

[0046] Comparative Example 1

[0047] The present invention provides a method for preparing a modified silicone catheter.

[0048] S1. Mix copper-silver antibacterial white carbon black, raw silica gel, vulcanizing agent and additives and put them into a rubber mixer, add polytetrafluoroethylene for mixing, set the polytetrafluoroethylene content to 8%, and press them into layers of silicone extrusion material with uniform thickness. The vulcanizing agent can be a platinum vulcanizing agent or a di-tetra-vulcanizing agent material;

[0049] S2, making and winding a semi-finished silicone catheter;

[0050] a1. Install the mold on the head of the silicone extruder;

[0051] a2. Cut the refined rubber into shapes of the same size and length, feed it through the silicone extruder, extrude it into a silicone tube, put the silicone tube into an eight-meter-long drying tunnel, vulcanize it at high temperature, support the semi-finished silicone tube, and wrap the semi-finished silicone tube. The heating temperature of the silicone tube is set to 100 degrees and the heating time is set to 1 hour;

[0052] S3. Put the wound silicone tube into the oven for vulcanization to remove the odor on the silicone tube.

[0053] Comparative Example 2

[0054] The present invention provides a method for preparing a modified silicone catheter.

[0055] S1. Mix copper-silver antibacterial white carbon black, raw silica gel, vulcanizing agent and additives and put them into a rubber mixer, add polytetrafluoroethylene for mixing, set the polytetrafluoroethylene content to 15%, and press them into layers of silicone extrusion material with uniform thickness. The vulcanizing agent can be platinum vulcanizing agent or di-tetra-vulcanizing agent material;

[0056] S2, making and winding a semi-finished silicone catheter;

[0057] a1. Install the mold on the head of the silicone extruder;

[0058] a2. Cut the refined rubber into shapes of the same size and length, feed it through the silicone extruder, extrude it into a silicone tube, put the silicone tube into an eight-meter-long drying tunnel, vulcanize it at high temperature, support the semi-finished silicone tube, and wrap the semi-finished silicone tube. The heating temperature of the silicone tube is set to 100 degrees and the heating time is set to 1 hour;

[0059] S3. Put the wound silicone tube into the oven for vulcanization to remove the odor on the silicone tube.

[0060] Comparative Example 3

[0061] The present invention provides a method for preparing a modified silicone catheter.

[0062] S1. Mix copper-silver antibacterial white carbon black, raw silica gel, vulcanizing agent and additives and put them into a rubber mixer, add polytetrafluoroethylene for mixing, set the polytetrafluoroethylene content to 30%, and press them into layers of uniform thickness of silicone extrusion material. The vulcanizing agent can be platinum vulcanizing agent or di-tetra-vulcanizing agent material;

[0063] S2, making and winding a semi-finished silicone catheter;

[0064] a1. Install the mold on the head of the silicone extruder;

[0065] a2. Cut the refined rubber into shapes of the same size and length, feed it through the silicone extruder, extrude it into a silicone tube, put the silicone tube into an eight-meter-long drying tunnel, vulcanize it at high temperature, support the semi-finished silicone tube, and wrap the semi-finished silicone tube. The heating temperature of the silicone tube is set to 100 degrees and the heating time is set to 1 hour;

[0066] S3. Put the wound silicone tube into the oven for vulcanization to remove the odor on the silicone tube.

[0067] Comparative Example 4

[0068] The present invention provides a method for preparing a modified silicone catheter.

[0069] S1. Mix copper-silver antibacterial white carbon black, raw silica gel, vulcanizing agent and additives and put them into a rubber mixer, add polytetrafluoroethylene for mixing, set the polytetrafluoroethylene content to 5%, and press them into layers of uniform thickness of silica gel extrusion material. The vulcanizing agent can be platinum vulcanizing agent or di-tetra-vulcanizing agent material;

[0070] S2, making and winding a semi-finished silicone catheter;

[0071] a1. Install the mold on the head of the silicone extruder;

[0072] a2. Cut the refined rubber into shapes of the same size and length, feed it through the silicone extruder, extrude it into a silicone tube, put the silicone tube into an eight-meter-long drying tunnel, vulcanize it at high temperature, support the semi-finished silicone tube, and wrap the semi-finished silicone tube. The heating temperature of the silicone tube is set to 100 degrees and the heating time is set to 1 hour;

[0073] S3. Put the wound silicone tube into the oven for vulcanization to remove the odor on the silicone tube.

[0074] Comparative Example 5

[0075] The present invention provides a method for preparing a modified silicone catheter.

[0076] S1. Mix copper-silver antibacterial white carbon black, raw silica gel, vulcanizing agent and additives and put them into a rubber mixer, add polytetrafluoroethylene for mixing, set the polytetrafluoroethylene content to 35%, and press them into layers of silicone extrusion material with uniform thickness. The vulcanizing agent can be platinum vulcanizing agent or di-tetra-vulcanizing agent material;

[0077] S2, making and winding a semi-finished silicone catheter;

[0078] a1. Install the mold on the head of the silicone extruder;

[0079] a2. Cut the refined rubber into shapes of the same size and length, feed it through the silicone extruder, extrude it into a silicone tube, put the silicone tube into an eight-meter-long drying tunnel, vulcanize it at high temperature, support the semi-finished silicone tube, and wrap the semi-finished silicone tube. The heating temperature of the silicone tube is set to 100 degrees and the heating time is set to 1 hour;

[0080] S3. Put the wound silicone tube into the oven for vulcanization to remove the odor on the silicone tube.

[0081] Furthermore, by setting different polytetrafluoroethylene contents, vulcanization temperatures and heating times to compare the final silicone catheters, it was found that the polytetrafluoroethylene content was 8% to 30% as the optimal range, the silicone heating temperature was 180 degrees, and the heating time was 2 hours.

[0082] The working principle of the present invention is as follows:

[0083] A modified silicone catheter and a preparation method thereof of the present embodiment include S1, mixing copper-silver antibacterial white carbon black, raw silicone, a vulcanizing agent and an auxiliary agent and putting them into a rubber mixer, adding polytetrafluoroethylene for mixing, and pressing them into layers of silicone extrudates with uniform thickness; S2, making and winding a semi-finished silicone catheter; S3, putting the wound silicone catheter into an oven for vulcanization to remove the odor on the silicone catheter, which can effectively remove the stickiness of the silicone surface and increase the lubricity. Compared with the traditional coating process, it greatly reduces the operation time and reduces the cost, and also effectively avoids the risk of the coating falling off in the blood vessel to form thrombus.

[0084] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A modified silicone catheter formula, characterized in that: The silicone catheter comprises copper-silver antibacterial white carbon black, raw silicone, a vulcanizing agent and an auxiliary agent.

2. The method for preparing a modified silicone catheter according to claim 1, characterized in that: The preparation method specifically comprises the following steps: S1, copper-silver antibacterial white carbon black, raw silica gel, vulcanizing agent and additives are mixed and put into a rubber mixer, polytetrafluoroethylene is added for mixing, and pressed into layers of silica gel extrusion material with uniform thickness; S2, making and winding a semi-finished silicone catheter; S3. Put the wound silicone tube into the oven for vulcanization to remove the odor on the silicone tube.

3. The method for preparing a modified silicone catheter according to claim 2, characterized in that: In the step S1, the content of tetrafluoroethylene is 8% to 30%.

4. The method for preparing a modified silicone catheter according to claim 2, characterized in that: The step S2 specifically includes the following steps: a1. Install the mold on the head of the silicone extruder; a2. Cut the refined rubber into shapes of the same size and length, feed it through the silicone extruder, extrude it into silicone catheters, put the silicone catheters into an eight-meter-long drying tunnel, vulcanize it at high temperature, support the semi-finished silicone catheters, and wrap the semi-finished silicone catheters.

5. The method for preparing a modified silicone catheter according to claim 2, characterized in that: The vulcanizing agent in step S1 may be platinum vulcanizing agent or di-tetra-vulcanizing agent.

6. The method for preparing a modified silicone catheter according to claim 4, characterized in that: In step a2, the heating temperature of the silicone catheter is set to 180 degrees, and the heating time is set to 2 hours.