CN111423715A - Medical wrist strap material for carbon ribbon printing and preparation method thereof - Google Patents
Medical wrist strap material for carbon ribbon printing and preparation method thereof Download PDFInfo
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- CN111423715A CN111423715A CN202010315655.3A CN202010315655A CN111423715A CN 111423715 A CN111423715 A CN 111423715A CN 202010315655 A CN202010315655 A CN 202010315655A CN 111423715 A CN111423715 A CN 111423715A
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- 239000000463 material Substances 0.000 title claims abstract description 55
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 238000007639 printing Methods 0.000 title claims abstract description 34
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 30
- 210000000707 wrist Anatomy 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229920000098 polyolefin Polymers 0.000 claims abstract description 22
- 239000005543 nano-size silicon particle Substances 0.000 claims abstract description 16
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 16
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 15
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 13
- 239000004433 Thermoplastic polyurethane Substances 0.000 claims abstract description 13
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims abstract description 13
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims description 24
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 15
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 13
- 239000004743 Polypropylene Substances 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- -1 polyethylene, ethylene-vinyl acetate Polymers 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 239000003242 anti bacterial agent Substances 0.000 claims description 6
- 229920001155 polypropylene Polymers 0.000 claims description 6
- 229920005606 polypropylene copolymer Polymers 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 5
- 229920002635 polyurethane Polymers 0.000 claims description 5
- 239000004814 polyurethane Substances 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 5
- 238000010345 tape casting Methods 0.000 claims description 5
- 238000009966 trimming Methods 0.000 claims description 5
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical group CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 claims description 4
- 229920005749 polyurethane resin Polymers 0.000 claims description 4
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 3
- WOXXJEVNDJOOLV-UHFFFAOYSA-N ethenyl-tris(2-methoxyethoxy)silane Chemical compound COCCO[Si](OCCOC)(OCCOC)C=C WOXXJEVNDJOOLV-UHFFFAOYSA-N 0.000 claims description 3
- 229920000570 polyether Polymers 0.000 claims description 3
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 2
- QYMGIIIPAFAFRX-UHFFFAOYSA-N butyl prop-2-enoate;ethene Chemical compound C=C.CCCCOC(=O)C=C QYMGIIIPAFAFRX-UHFFFAOYSA-N 0.000 claims description 2
- 229920006245 ethylene-butyl acrylate Polymers 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims description 2
- 230000002209 hydrophobic effect Effects 0.000 abstract description 2
- 230000008595 infiltration Effects 0.000 abstract description 2
- 238000001764 infiltration Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 abstract description 2
- 229940051841 polyoxyethylene ether Drugs 0.000 abstract 1
- 229920000056 polyoxyethylene ether Polymers 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 15
- 239000002131 composite material Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 239000008280 blood Substances 0.000 description 4
- 210000004369 blood Anatomy 0.000 description 4
- 230000003628 erosive effect Effects 0.000 description 4
- 229910021389 graphene Inorganic materials 0.000 description 4
- 239000002135 nanosheet Substances 0.000 description 4
- 239000010865 sewage Substances 0.000 description 4
- 239000003599 detergent Substances 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 201000004624 Dermatitis Diseases 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
- C08L75/06—Polyurethanes from polyesters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/90—Identification means for patients or instruments, e.g. tags
-
- 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
- B29C48/92—Measuring, controlling or regulating
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
- C08L75/08—Polyurethanes from polyethers
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/02—Applications for biomedical use
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Pathology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Mechanical Engineering (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Materials For Medical Uses (AREA)
Abstract
The invention provides a medical wrist strap material for printing a carbon ribbon and a preparation method thereof, wherein the medical wrist strap material comprises the following components: 70-90 parts by weight of thermoplastic polyurethane; 20-30 parts by weight of polyolefin; 5-10 parts of fatty alcohol-polyoxyethylene ether; 5-10 parts of nano silicon dioxide; 3-5 parts of modified nano calcium carbonate; 1-5 parts of silane coupling agent. The medical wrist strap material provided by the invention has excellent flexibility, moderate hardness, and is comfortable to wear, free of curling and deformation; meanwhile, the medical wrist strap material disclosed by the invention is hydrophobic and non-oleophobic, has good oil infiltration spreadability, and can meet the requirements of carbon ribbon printing while being waterproof.
Description
Technical Field
The invention belongs to the technical field of composite materials, and relates to a medical wrist strap material for carbon ribbon printing and a preparation method thereof.
Background
In hospitals, each doctor or nurse faces a large number of patients every day, and it is difficult to remember specific information for each patient. At present, most of information of each patient, particularly information of inpatients, of a hospital is recorded on a card, and then the card is directly placed at one end of a patient bed, so that the problem that the card is easy to lose and even be exchanged exists in the card utilization mode, and therefore a wrist strap worn on the wrist of the patient appears.
The medical wrist strap can provide patient identification information, is an effective tool for doctors to identify patients, can be made into various medical wrist straps according to requirements, can be printed with one-dimensional or two-dimensional bar codes, and is convenient for an information system to read patient information into the system quickly and conveniently. Thus, there is a need for medical bracelets that are printable and printable with carbon tape.
The current medical wrist strap is easy to curl and deform when being worn, so that the information of a patient cannot be read quickly; meanwhile, if abrasion occurs in the wearing process, the information cannot be read, so that the material of the medical wrist strap is important; if the material is hard, the patient, especially the neonate, may be cut.
CN104175672A discloses a composite film for medical wrist straps and a preparation process thereof, the composite film sequentially comprises a protective layer, a composite adhesive layer and an identification layer, the protective layer is an EVA film, the composite adhesive in the composite adhesive layer is polyether composite adhesive, the identification layer is thermal sensitive paper, and a thermal sensitive coating with the thickness of 1-5 μm is arranged on the thermal sensitive paper; the composite film provided by the patent application is soft in texture, but is easy to crack and cause curling. CN107641313A discloses a high-wear-resistance TPU material for 3D printing and a preparation method thereof, wherein the TPU material comprises the following raw materials: 60-80 parts of TPU particles, 10-20 parts of ABS resin, 15-25 parts of polyvinyl alcohol, 3-10 parts of graphene nanosheets, 15-20 parts of nano silicon dioxide, 5-8 parts of nano boron nitride and 1-5 parts of silane coupling agent; the TPU material provided in this patent application, although printable, is relatively stiff and less comfortable to wear.
Therefore, there is a need to develop a medical wristband material that is comfortable to wear, does not curl, and has good wear resistance.
Disclosure of Invention
The invention aims to provide a medical wrist strap material for printing a carbon tape and a preparation method thereof. The medical wrist strap material provided by the invention has excellent flexibility, moderate hardness, and is comfortable to wear, free of curling and deformation; meanwhile, the medical wrist strap material disclosed by the invention is hydrophobic and non-oleophobic, has good oil infiltration spreadability, and can meet the requirements of carbon ribbon printing while being waterproof.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a medical wrist strap material for carbon ribbon printing, which comprises the following components in parts by weight:
according to the invention, the nano silicon dioxide and the modified nano calcium carbonate are introduced into the material, and the nano silicon dioxide and the modified nano calcium carbonate are matched with each other, so that the surface energy of the material can be reduced, and the material can be printed by using a carbon ribbon; and the printed writing can not be washed away or rubbed off, and can be kept clear for a long time. By adding part of polyolefin into the material, the material can be ensured to have scratch resistance and resist the erosion of blood, IPA, sewage, detergent, alcohol and the like. The material provided by the invention has good mechanical property, is not easy to stretch and deform, cannot be replaced or removed at will after being worn, and can ensure the uniqueness and correctness of the identification object.
In the present invention, the thermoplastic polyurethane is 70 to 90 parts by weight, for example, 71 parts by weight, 73 parts by weight, 75 parts by weight, 78 parts by weight, 80 parts by weight, 82 parts by weight, 85 parts by weight, and the like.
In the present invention, the polyolefin is 20 to 30 parts by weight, for example, 22 parts by weight, 25 parts by weight, 28 parts by weight, and the like.
In the present invention, the nano silica is 5 to 10 parts by weight, for example, 6 parts by weight, 7 parts by weight, 8 parts by weight, 9 parts by weight, and the like.
In the present invention, the modified calcium carbonate is 3 to 5 parts by weight, for example, 3.5 parts by weight, 4 parts by weight, 4.5 parts by weight.
In the present invention, the nano antibacterial agent is 1 to 5 parts by weight, for example, 2 parts by weight, 3 parts by weight, 4 parts by weight, and the like.
In the present invention, the silane coupling agent is 1 to 5 parts by weight, for example, 2 parts by weight, 3 parts by weight, 4 parts by weight, and the like.
Preferably, the polyolefin is selected from any one of polyethylene, ethylene-vinyl acetate copolymer, polypropylene or ethylene-butyl acrylate copolymer or a combination of at least two of the two, and further preferably a combination of polypropylene and ethylene-vinyl acetate copolymer.
Preferably, the polyolefin is selected from the group consisting of polypropylene and ethylene-vinyl acetate copolymer in a mass ratio of (1-2: 1, e.g., 1.2:1, 1.4:1, 1.6:1, 1.8:1, etc.
Preferably, the ethylene-vinyl acetate copolymer has a vinyl acetate content of 20 wt% or less, such as 6 wt%, 9 wt%, 13 wt%, 16 wt%, and the like.
The medical wrist strap material prepared by the method has good wear resistance and can efficiently resist the erosion of blood, IPA, sewage, detergent, alcohol and the like by selecting the specific polyolefin.
Preferably, the thermoplastic polyurethane is a medical grade polyurethane resin selected from polyester polyurethane and polyether polyurethane.
The medical polyurethane resin is adopted, so that the medical polyurethane resin is comfortable and environment-friendly, does not cause skin allergy of a patient, does not cut the skin of the patient, is comfortable and attractive, and ensures the use safety.
Preferably, the nanosilica has a particle size of 50-80nm, such as 57nm, 61nm, 66nm, 69nm, 75nm, 78nm, and the like.
Preferably, the silane coupling agent is selected from vinyltrimethoxysilane and/or vinyltris (β -methoxyethoxy) silane.
In a second aspect, the present invention provides a method for preparing a medical wristband material for carbon ribbon printing according to the first aspect, the method comprising the steps of:
(1) mixing nano silicon dioxide and modified nano calcium carbonate, and then uniformly mixing the mixture with a silane coupling agent to obtain a first mixture;
(2) and mixing the first mixture, polyolefin, the nano antibacterial agent and thermoplastic polyurethane, drying, and finally extruding by using a single-screw extruder, carrying out tape casting and opposite pressing, cooling, trimming, and carrying out pressure rolling to obtain the medical wristband material for carbon ribbon printing.
Preferably, the stirring rate in the two mixing steps in step (1) is independently 100-150r/min, such as 110r/min, 126r/min, 131r/min, 137r/min, 142r/min, 146r/min, etc.
Preferably, the mixing speed in step (2) is 200-300r/min, such as 204r/min, 219r/min, 233r/min, 246r/min, 258r/min, 267r/min, 289r/min, etc.
Preferably, the drying is carried out at a temperature of 85-100 deg.C, such as 88 deg.C, 90 deg.C, 92 deg.C, 95 deg.C, 98 deg.C, etc., for a period of 4-6 hours, such as 4.5 hours, 5 hours, 5.5 hours, etc.
Preferably, the temperature of the feeding section of the single-screw extruder is 120-; the temperature of the mixing section is 150 ℃ and 170 ℃, such as 155 ℃, 160 ℃, 165 ℃, 167 ℃, 169 ℃ and the like; the temperature of the extrusion section is 170-200 ℃, such as 175 ℃, 180 ℃, 185 ℃, 190 ℃, 195 ℃ and the like; the temperature of the head is 180 ℃ to 210 ℃, such as 185 ℃, 190 ℃, 195 ℃, 200 ℃, 205 ℃ and the like.
Compared with the prior art, the invention has the following beneficial effects:
(1) according to the invention, the nano silicon dioxide and the modified nano calcium carbonate are introduced into the material, and the two components are matched, so that the surface energy of the material can be reduced, and the material can be printed by using a carbon ribbon; and the printed writing can not be washed away or rubbed off, and can be kept clear for a long time. By adding part of polyolefin into the material, the material can be ensured to have scratch resistance and resist the erosion of blood, IPA, sewage, detergent, alcohol and the like. The material provided by the invention has good mechanical property, is not easy to stretch and deform, cannot be replaced or removed at will after being worn, and can ensure the uniqueness and correctness of the identification object;
(2) according to the invention, by selecting specific polyolefin, the finally obtained medical wrist strap material can be ensured to have better wear resistance and can efficiently resist the erosion of blood, IPA, sewage, cleaning agent, alcohol and the like;
(3) the medical wrist strap material provided by the invention has good mechanical properties, and meanwhile, has moderate hardness, good flexibility, good printing performance, long-term use and no abrasion of writing and the like; wherein, the tensile strength is between 15 and 19MPa, the hardness is between 40 and 57, so the hardness is moderate, the texture is soft, meanwhile, the printing performance is good, the wear resistance is good, and the unclear handwriting caused by friction and the like can not occur.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
The following examples and comparative examples relate to the following materials and the following trade mark information:
example 1
A medical wrist strap material for printing a carbon ribbon comprises the following components in parts by weight:
wherein the polyolefin is a combination of polypropylene and an ethylene-vinyl acetate copolymer, and the mass ratio is 1: 1; the particle size of the nano silicon dioxide is 50 +/-5 mu m; the silane coupling agent is vinyl trimethoxy silane.
The preparation method comprises the following steps:
(1) mixing nano silicon dioxide and graphene nanosheets at a stirring speed of 100r/min, and then uniformly mixing the nano silicon dioxide and a silane coupling agent at a stirring speed of 100r/min to obtain a first mixture;
(2) mixing the first mixture, polyolefin, an antibacterial agent and thermoplastic polyurethane at a stirring speed of 200r/min, drying at 90 ℃ for 5 hours, and finally extruding by using a single-screw extruder, carrying out tape casting and counter-pressing, cooling, trimming, pressurizing and rolling to obtain the medical wristband material for carbon ribbon printing;
the temperature of the feeding section of the single-screw extruder is 120 ℃, the temperature of the mixing section is 150 ℃, the temperature of the extrusion section is 170 ℃, and the temperature of the machine head is 180 ℃.
Example 2
A medical wrist strap material for printing a carbon ribbon comprises the following components in parts by weight:
wherein the polyolefin is a combination of polypropylene and an ethylene-vinyl acetate copolymer, and the mass ratio is 1: 1; the particle size of the nano silicon dioxide is 50 +/-5 mu m; the silane coupling agent is vinyl trimethoxy silane.
The preparation method comprises the following steps:
(1) mixing nano silicon dioxide and graphene nanosheets at a stirring speed of 131r/min, and then uniformly mixing the nano silicon dioxide and a silane coupling agent at a stirring speed of 131r/min to obtain a first mixture;
(2) mixing the first mixture, polyolefin, an antibacterial agent and thermoplastic polyurethane at a stirring speed of 300r/min, drying at 85 ℃ for 6 hours, and finally extruding by using a single-screw extruder, carrying out tape casting and counter-pressing, cooling, trimming, pressurizing and rolling to obtain the medical wristband material for carbon ribbon printing;
the temperature of the feeding section of the single-screw extruder is 150 ℃, the temperature of the mixing section is 170 ℃, the temperature of the extrusion section is 200 ℃, and the temperature of the machine head is 210 ℃.
Example 3
A medical wrist strap material for printing a carbon ribbon comprises the following components in parts by weight:
wherein the polyolefin is a combination of polypropylene and ethylene-vinyl acetate copolymer with a mass ratio of 1:1, the particle size of the nano silicon dioxide is 50 +/-5 mu m, and the silane coupling agent is vinyl tris (β -methoxyethoxy) silane.
The preparation method comprises the following steps:
(1) mixing nano silicon dioxide and graphene nanosheets at a stirring speed of 150r/min, and then uniformly mixing the nano silicon dioxide and a silane coupling agent at a stirring speed of 150r/min to obtain a first mixture;
(2) mixing the first mixture, polyolefin, an antibacterial agent and thermoplastic polyurethane at a stirring speed of 240r/min, drying at 100 ℃ for 4 hours, and finally extruding by using a single-screw extruder, carrying out tape casting and counter-pressing, cooling, trimming, pressurizing and rolling to obtain the medical wristband material for carbon ribbon printing;
the temperature of the feeding section of the single-screw extruder is 130 ℃, the temperature of the mixing section is 160 ℃, the temperature of the extrusion section is 190 ℃ and the temperature of the machine head is 200 ℃.
Examples 4 to 6
The only difference from example 1 is that the polyolefin in this example is a combination of polypropylene and ethylene-vinyl acetate copolymer in mass ratios of 2:1 (example 4), 3:1 (example 5), and 1:2 (example 6).
Example 7
The only difference from example 1 is that the polyolefin in this example is polyethylene.
Examples 8 to 9
The only difference from example 1 is that the particle size of the nanosilica in this example is 30. + -.5. mu.m (example 8) and 120. + -.5. mu.m (example 9).
Comparative examples 1 to 2
The only difference from example 1 is that the content of the polyurethane in this example was 60 parts by weight (comparative example 1) and 100 parts by weight (comparative example 2).
Comparative examples 3 to 4
The only difference from example 1 is that the polyolefin content in this example was 10 parts by weight (comparative example 3) and 40 parts by weight (comparative example 4).
Comparative examples 5 to 6
The only difference from example 1 is that the content of the nano silica in this example is 1 part by weight (comparative example 5) and 15 parts by weight (comparative example 6).
Comparative examples 7 to 8
The only difference from example 1 is that the modified nano calcium carbonate in this example was contained in an amount of 1 part by weight (comparative example 7) and 8 parts by weight (comparative example 8).
Performance testing
The medical wristband materials for carbon tape printing provided in examples 1 to 9 and comparative examples 1 to 8 were subjected to a performance test by the following method:
(1) mechanical properties: testing according to GB/T528-2009 test standard;
(2) printing performance: after printing with the carbon ribbon, observing the printing definition, wherein:
a level: the handwriting is clear and complete;
b stage: the handwriting is clearer and complete;
c level: the handwriting is unclear.
(3) Hardness (HD): testing according to GB/T531.2-2009 test standard;
(4) the service performance is as follows: the material on which the handwriting was printed was faced upward, and rubbed with 2000-mesh fine sandpaper with 10N force for 5 times to observe the sharpness of the handwriting, wherein,
a level: the handwriting is clear and complete;
b stage: the handwriting is clearer and complete;
c level: the handwriting is unclear.
The test results are shown in table 1:
TABLE 1
According to the embodiment and the performance test, the medical wrist strap material provided by the invention has good mechanical property, moderate hardness, good flexibility and good printing performance, can be used for a long time, and the handwriting cannot be abraded; wherein, the tensile strength is between 15 and 19MPa, the hardness is between 40 and 57, so the hardness is moderate, the texture is soft, meanwhile, the printing performance is good, the wear resistance is good, and the unclear handwriting caused by friction and the like can not occur.
As is clear from comparison between examples 1 and 4 to 7, the polyolefin of the present invention preferably comprises a combination of polypropylene and an ethylene-vinyl acetate copolymer, and more preferably comprises a polypropylene and an ethylene-vinyl acetate copolymer at a mass ratio of (1-2):1, and the resulting material has good writing fastness and wear resistance and is not worn off even after long-term use. As can be seen from the comparison between example 1 and examples 8-9, the particle size of the nano-silica is preferably 50-80nm, and the printing effect of the material is better. As is clear from comparison between example 1 and comparative examples 1 to 8, the amounts of the respective components to be added need to be within the limits of the present invention in order to obtain the advantageous effects of the present invention.
The applicant states that the present invention is illustrated by the above examples of the medical wristband material for printing a carbon ribbon and the preparation method thereof, but the present invention is not limited to the above detailed method, that is, it does not mean that the present invention must be implemented by relying on the above detailed method. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
Claims (10)
1. The medical wrist strap material for carbon ribbon printing is characterized by comprising the following components in parts by weight:
2. the medical wristband material for carbon tape printing according to claim 1, wherein the polyolefin is selected from any one of polyethylene, ethylene-vinyl acetate copolymer, polypropylene or ethylene-butyl acrylate copolymer or a combination of at least two thereof, further preferably a combination of polypropylene and ethylene-vinyl acetate copolymer;
preferably, the content of vinyl acetate in the ethylene-vinyl acetate copolymer is below 20 wt%.
3. The medical wristband material for carbon tape printing according to claim 2, wherein the polyolefin is selected from a combination of polypropylene and ethylene-vinyl acetate copolymer in a mass ratio of (1-2): 1.
4. The medical wristband material for carbon tape printing according to any of claims 1 to 3, wherein the thermoplastic polyurethane is a medical grade polyurethane resin selected from polyester polyurethane and polyether polyurethane.
5. The medical wristband material for carbon tape printing according to any one of claims 1 to 4, wherein the particle size of the nanosilica is 50-80 nm.
6. The medical wristband material for carbon tape printing according to any of claims 1 to 5, wherein the silane coupling agent is selected from vinyltrimethoxysilane and/or vinyltris (β -methoxyethoxy) silane.
7. Method for the preparation of a medical wristband material for carbon tape printing according to any of claims 1 to 6, characterized in that it comprises the following steps:
(1) mixing nano silicon dioxide and modified nano calcium carbonate, and then uniformly mixing the mixture with a silane coupling agent to obtain a first mixture;
(2) and mixing the first mixture, polyolefin, the nano antibacterial agent and thermoplastic polyurethane, drying, and finally extruding by using a single-screw extruder, carrying out tape casting and opposite pressing, cooling, trimming, and carrying out pressure rolling to obtain the medical wristband material for carbon ribbon printing.
8. The method as claimed in claim 7, wherein the stirring rate in the two mixing steps in step (1) is independently 100-150 r/min.
9. The preparation method according to claim 7 or 8, wherein the mixing in step (2) is performed at a stirring speed of 200-300 r/min;
preferably, the drying temperature is 85-100 ℃ and the drying time is 4-6 h.
10. The method as claimed in any one of claims 7 to 9, wherein the temperature of the feeding section of the single-screw extruder is from 120 ℃ to 150 ℃, the temperature of the mixing section is from 150 ℃ to 170 ℃, the temperature of the extrusion section is from 170 ℃ to 200 ℃, and the temperature of the head is from 180 ℃ to 210 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010315655.3A CN111423715A (en) | 2020-04-21 | 2020-04-21 | Medical wrist strap material for carbon ribbon printing and preparation method thereof |
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| CN202010315655.3A CN111423715A (en) | 2020-04-21 | 2020-04-21 | Medical wrist strap material for carbon ribbon printing and preparation method thereof |
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| CN111423715A true CN111423715A (en) | 2020-07-17 |
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Cited By (1)
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| CN113078453A (en) * | 2021-04-07 | 2021-07-06 | 中南大学 | Novel wearable wrist type antenna, wrist strap and processing method of wrist strap |
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Application publication date: 20200717 |