CN115044158A - TPE modified material and preparation method and application thereof - Google Patents
TPE modified material and preparation method and application thereof Download PDFInfo
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- CN115044158A CN115044158A CN202210876268.6A CN202210876268A CN115044158A CN 115044158 A CN115044158 A CN 115044158A CN 202210876268 A CN202210876268 A CN 202210876268A CN 115044158 A CN115044158 A CN 115044158A
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- tpe
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- erucamide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
- C08L53/025—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes modified
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Abstract
The invention provides a TPE modified material which comprises the following components in parts by weight: 40-70 parts of a styrene-ethylene-butylene-styrene block copolymer; 30-60 parts of polypropylene; erucamide 0.05-0.25 part. The TPE modified material provided by the invention has simple formula components, improves the hardness and strength of the TPE material, effectively increases the resistance to deformation of the material under the action of external force, solves the quality problem that a medical infusion joint disinfection cap product falls off under the action of lateral force by using the TPE sealing ring produced by the TPE modified material, improves the adaptability of the medical infusion joint disinfection cap product to positive pressure joints with different specifications on the market, and makes an important contribution to the effectiveness of clinical disinfection effect.
Description
Technical Field
The invention relates to the technical field of medical materials, in particular to a TPE (thermoplastic elastomer) modified material and a preparation method and application thereof.
Background
The TPE material that sealing ring is commonly used in the existing market is soft TPE material, because TPE material hardness is low, elasticity is good, when meetting the exogenic action, takes place elastic deformation easily, the disposable infusion that produces connects disinfection cap, be used for with some diameters little, the short malleation of screw-thread fit length connects, connect the back through interference fit, lead to the product to receive the side force effect to appear droing, can't realize sterile clinical use requirement.
Disclosure of Invention
In view of the above, the technical problem to be solved by the present invention is to provide a TPE modified material, and a preparation method and an application thereof, so as to improve the adaptability to positive pressure joints with different specifications in the market.
The invention provides a TPE modified material which comprises the following components in parts by weight:
40-70 parts of styrene-ethylene-butylene-styrene block copolymer (SEBS);
30-60 parts of polypropylene;
erucamide 0.05-0.25 part.
Wherein the SEBS is white granular in appearance and has a density of 0.89kg/m 3 The glass transition temperature is-30 to-34 ℃, and the styrene content is 10 to 14 weight percent.
The polypropylene is white granular in appearance and has the density of 0.90kg/m 3 The mass flow rate of the melt is 14-16 g/10 min.
The erucamide is white powder in appearance and has the density of 0.94kg/m 3 The boiling point is 473.86 ℃, and the anti-sticking agent, the lubricant and the mold release agent are mainly used as resin.
According to the invention, the erucamide is added into the TPE modified material for modification, so that the hardness and strength of the TPE material are improved, the capability of resisting deformation of the material under the action of external force is effectively improved, the quality problem that a medical infusion joint disinfection cap product falls off under the action of lateral force is solved by using the TPE sealing ring produced by using the erucamide, the adaptability of the medical infusion joint disinfection cap product to positive pressure joints with different specifications in the market is improved, and the important contribution is made to the effectiveness of clinical disinfection effect.
Preferably, the TPE modified material comprises the following components in parts by weight:
50-65 parts of a styrene-ethylene-butylene-styrene block copolymer;
35-50 parts of polypropylene;
erucamide 0.10-0.20 parts.
Most preferably, the TPE modified material comprises the following components in parts by weight:
50 parts of a styrene-ethylene-butylene-styrene block copolymer;
50 parts of polypropylene;
erucamide 0.20 parts.
Under the proportion, the prepared TPE modified material has the best hardness and strength and the minimum dynamic friction coefficient, and has the best service performance when being applied to a transfusion connector disinfection cap.
The invention provides a preparation method of the TPE modified material, which comprises the following steps:
s1) adding the SEBS and the polypropylene into a high-speed mixer, mixing for 10-15 min, adding the erucamide, and mixing for 5-10 min until the materials are uniformly mixed;
s2) putting the mixed material obtained in the step S1) into a double-screw extruder for extrusion and granulation to obtain the TPE modified material.
Preferably, the extrusion granulation is divided into three sections, wherein the temperature of each section is 130-160 ℃ at the head, 170-210 ℃ at the first section and 160-195 ℃ at the second section.
Preferably, the TPE modified material obtained from the double-screw extruder is dried for 25-35 min at 70-90 ℃.
The invention provides an application of the TPE modified material as a TPE sealing ring of a disinfection cap of an infusion joint.
Preferably, the infusion connector disinfection cap is a disposable infusion connector disinfection cap.
Specifically, the TPE modified material is put into an injection molding machine, and the TPE sealing ring is prepared by storing, injecting, cooling, molding and demolding.
The invention provides a TPE sealing ring which is prepared from the TPE modified material.
Compared with the prior art, the invention provides a TPE modified material, which comprises the following components in parts by weight: 40-70 parts of a styrene-ethylene-butylene-styrene block copolymer; 30-60 parts of polypropylene; erucamide 0.05-0.25 part. The TPE modified material provided by the invention has simple formula components, improves the hardness and strength of the TPE material, effectively increases the resistance to deformation of the material under the action of external force, solves the quality problem that a medical infusion joint disinfection cap product falls off under the action of lateral force by using the TPE sealing ring produced by the TPE modified material, improves the adaptability of the medical infusion joint disinfection cap product to positive pressure joints with different specifications on the market, and makes an important contribution to the effectiveness of clinical disinfection effect.
Detailed Description
In order to further illustrate the present invention, the following examples are provided to describe the TPE modified materials and their preparation and application in detail.
Examples 1 to 7
The amounts of the components are shown in table 1.
The preparation process comprises the following steps:
step one, weighing materials according to the amount of each component in a formula, adding SEBS and polypropylene into a high-speed mixer, mixing for 10min, adding erucamide, and mixing for 5min until the materials are uniformly mixed;
step two, putting the mixed material in the step one into a double-screw extruder for extrusion granulation, wherein the extrusion granulation is divided into three sections, the temperature of each section is 130-160 ℃, the temperature of the first section is 170-210 ℃, and the temperature of the second section is 160-195 ℃; drying the TPE modified material obtained from the double-screw extruder at 70-90 ℃ for 25-35 min;
step three, putting the material in the step two into an injection molding machine, performing injection molding, cooling and demolding to prepare a TPE modified sample;
step four, performing performance analysis on the TPE modified sample in the step three, wherein the result is shown in Table 2;
putting the TPE modified material in the step two into an injection molding machine, storing, injecting, cooling, molding and demolding to prepare a TPE sealing ring;
and step six, the TPE sealing ring in the step five is connected with the positive pressure joint, so that the assembly performance is good, the sealing performance is good, and the problems of thread slipping and falling are avoided.
Table 1 embodiment 1-7# (parts by mass):
| 1# | 2# | 3# | 4# | 5# | 6# | 7# | |
| SEBS | 65 | 60 | 55 | 50 | 55 | 62 | 55 |
| polypropylene | 35 | 40 | 45 | 50 | 45 | 38 | 45 |
| Erucamide | 0.20 | 0.20 | 0.20 | 0.20 | 0.15 | 0.15 | 0.10 |
Table 2 results of performance testing of TPE materials of embodiments 1-7
| Tensile strength MPa | Elongation at break% | Hardness Shore A | Coefficient of dynamic friction | |
| 1# | 13.4 | 289 | 70 | 0.736 |
| 2# | 13.7 | 309 | 73 | 0.625 |
| 3# | 14.2 | 312 | 75 | 0.507 |
| 4# | 15.1 | 265 | 79 | 0.460 |
| 5# | 14.8 | 268 | 75 | 0.725 |
| 6# | 13.5 | 300 | 72 | 0.837 |
| 7# | 14.7 | 269 | 74 | 1.001 |
Comparative examples 1 to 5
The amounts of the SEBS and the polypropylene without erucamide are shown in Table 3, the preparation method is the same as that of the example, the unmodified TPE is obtained, the same performance analysis is carried out, and the results are shown in Table 4.
The screw is connected with the positive pressure joint, the screw is difficult to screw in, the problems of falling and leakage occur, and the product adaptability is poor.
Table 3 comparative examples 1 to 5# (parts by mass):
| comparative example | 1# | 2# | 3# | 4# | 5# |
| SEBS | 65 | 60 | 55 | 50 | 62 |
| Polypropylene | 35 | 40 | 45 | 50 | 38 |
TABLE 4 test results of TPE materials of comparative examples 1-5#
| Tensile strength MPa | Elongation at break% | Hardness Shore A | Coefficient of dynamic friction | |
| 1# | 12.9 | 256 | 69 | 1.130 |
| 2# | 13.2 | 279 | 71 | 1.124 |
| 3# | 13.8 | 291 | 72 | 1.120 |
| 4# | 14.5 | 246 | 75 | 1.116 |
| 5# | 13.1 | 249 | 70 | 1.141 |
The above examples and comparative examples demonstrate that the addition of erucamide in the present invention improves the hardness and strength of the material, reduces the friction coefficient of the material, and facilitates the molding of the material.
The disposable infusion connector disinfection cap produced by the modified TPE material is connected with a positive pressure connector, and when the disposable infusion connector disinfection cap is subjected to lateral thrust and axial pressure, the TPE modified material is high in hardness and strength, so that the sealing ring is not easy to deform, and the problems of thread slipping and falling do not occur.
The disposable infusion connector disinfection cap produced by using the modified TPE material is subjected to adaptation experiments by positive compression joint (provided by manufacturers such as Beran, Shubeikang, BD and Xinhua) with different specifications on the market, and the experimental result shows that the disposable infusion connector disinfection cap is good in adaptability in the clinical use process.
The invention realizes the product function by adjusting the component proportion, and solves the problems of falling off and poor adaptability of the medical infusion joint disinfection cap if the component addition proportion and the method steps are replaced, and the invention belongs to the protection scope of the patent.
The above description of the embodiments is only intended to facilitate the understanding of the method of the invention and its core idea. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (8)
1. The TPE modified material comprises the following components in parts by weight:
40-70 parts of a styrene-ethylene-butylene-styrene block copolymer;
30-60 parts of polypropylene;
erucamide 0.05-0.25 part.
2. The TPE modified material of claim 1, comprising, in parts by weight:
50-65 parts of a styrene-ethylene-butylene-styrene block copolymer;
35-50 parts of polypropylene;
erucamide 0.10-0.20 parts.
3. The TPE modified material of claim 2, comprising, in parts by weight:
50 parts of a styrene-ethylene-butylene-styrene block copolymer;
50 parts of polypropylene;
erucamide 0.20 parts.
4. The preparation method of the TPE modified material as claimed in any one of claims 1 to 3, which comprises the following steps:
s1) adding SEBS and polypropylene into a high-speed mixer, mixing for 10-15 min, adding erucamide, and mixing for 5-10 min until the materials are uniformly mixed;
s2) putting the mixed material obtained in the step S1) into a double-screw extruder for extrusion and granulation to obtain the TPE modified material.
5. The method according to claim 4, wherein the extrusion granulation is divided into three sections, wherein the head temperature is 130 ℃ to 160 ℃, the first section temperature is 170 ℃ to 210 ℃, and the second section temperature is 160 ℃ to 195 ℃.
6. The preparation method of claim 4, wherein the TPE modified material obtained from the twin-screw extruder is dried at 70-90 ℃ for 25-35 min.
7. The use of the TPE modified material of any one of claims 1 to 3 as a TPE sealing ring of a disinfection cap of an infusion joint.
8. A TPE sealing ring is prepared from the TPE modified material as claimed in any one of claims 1-3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210876268.6A CN115044158A (en) | 2022-07-25 | 2022-07-25 | TPE modified material and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210876268.6A CN115044158A (en) | 2022-07-25 | 2022-07-25 | TPE modified material and preparation method and application thereof |
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| CN115044158A true CN115044158A (en) | 2022-09-13 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001261902A (en) * | 2000-03-17 | 2001-09-26 | Tokuyama Corp | Polypropylene-based resin composition |
| CN109735042A (en) * | 2018-12-28 | 2019-05-10 | 成都兢鹏生化科技有限公司 | A kind of medical AMTPS material, medical instrument and preparation method |
| CN109836756A (en) * | 2019-02-20 | 2019-06-04 | 广东祥利科技有限公司 | A kind of efficient low-smoke halogen-free flame-retardant thermoplastic elastomer of Antistatic type and preparation method thereof |
-
2022
- 2022-07-25 CN CN202210876268.6A patent/CN115044158A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001261902A (en) * | 2000-03-17 | 2001-09-26 | Tokuyama Corp | Polypropylene-based resin composition |
| CN109735042A (en) * | 2018-12-28 | 2019-05-10 | 成都兢鹏生化科技有限公司 | A kind of medical AMTPS material, medical instrument and preparation method |
| CN109836756A (en) * | 2019-02-20 | 2019-06-04 | 广东祥利科技有限公司 | A kind of efficient low-smoke halogen-free flame-retardant thermoplastic elastomer of Antistatic type and preparation method thereof |
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