CN115785559A - Moisture-absorbing antibacterial polypropylene material and preparation method thereof - Google Patents
Moisture-absorbing antibacterial polypropylene material and preparation method thereof Download PDFInfo
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- CN115785559A CN115785559A CN202211649915.6A CN202211649915A CN115785559A CN 115785559 A CN115785559 A CN 115785559A CN 202211649915 A CN202211649915 A CN 202211649915A CN 115785559 A CN115785559 A CN 115785559A
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- 239000004743 Polypropylene Substances 0.000 title claims abstract description 77
- -1 polypropylene Polymers 0.000 title claims abstract description 73
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 71
- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 61
- 239000000463 material Substances 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 229920005862 polyol Polymers 0.000 claims abstract description 29
- 150000003077 polyols Chemical class 0.000 claims abstract description 29
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 28
- 229920000570 polyether Polymers 0.000 claims abstract description 28
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 27
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 24
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 23
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 23
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 17
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 239000000155 melt Substances 0.000 claims abstract description 4
- 238000007334 copolymerization reaction Methods 0.000 claims abstract description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 12
- 238000001125 extrusion Methods 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 238000005469 granulation Methods 0.000 claims description 6
- 230000003179 granulation Effects 0.000 claims description 6
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000003242 anti bacterial agent Substances 0.000 claims description 4
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- 150000007970 thio esters Chemical class 0.000 claims description 4
- 239000005909 Kieselgur Substances 0.000 claims description 3
- GHKOFFNLGXMVNJ-UHFFFAOYSA-N Didodecyl thiobispropanoate Chemical group CCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCC GHKOFFNLGXMVNJ-UHFFFAOYSA-N 0.000 claims description 2
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical group CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 2
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical group CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 claims description 2
- 239000002270 dispersing agent Substances 0.000 claims description 2
- 239000000314 lubricant Substances 0.000 claims description 2
- 229920001451 polypropylene glycol Polymers 0.000 claims description 2
- 229910004298 SiO 2 Inorganic materials 0.000 claims 1
- 239000006096 absorbing agent Substances 0.000 claims 1
- 239000000654 additive Substances 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 abstract description 14
- 238000002156 mixing Methods 0.000 abstract description 7
- 238000001179 sorption measurement Methods 0.000 abstract description 4
- 230000009471 action Effects 0.000 abstract description 3
- 230000003115 biocidal effect Effects 0.000 abstract description 2
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 abstract 1
- 230000007774 longterm Effects 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 14
- 239000004745 nonwoven fabric Substances 0.000 description 13
- 239000000835 fiber Substances 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000036541 health Effects 0.000 description 4
- 230000008595 infiltration Effects 0.000 description 4
- 238000001764 infiltration Methods 0.000 description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000002791 soaking Methods 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 125000002843 carboxylic acid group Chemical group 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 229920001661 Chitosan Polymers 0.000 description 1
- 241000588724 Escherichia coli Species 0.000 description 1
- SXRSQZLOMIGNAQ-UHFFFAOYSA-N Glutaraldehyde Chemical compound O=CCCCC=O SXRSQZLOMIGNAQ-UHFFFAOYSA-N 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 241000191967 Staphylococcus aureus Species 0.000 description 1
- 238000006136 alcoholysis reaction Methods 0.000 description 1
- HPTYUNKZVDYXLP-UHFFFAOYSA-N aluminum;trihydroxy(trihydroxysilyloxy)silane;hydrate Chemical compound O.[Al].[Al].O[Si](O)(O)O[Si](O)(O)O HPTYUNKZVDYXLP-UHFFFAOYSA-N 0.000 description 1
- 238000009960 carding Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- ONCZQWJXONKSMM-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical compound O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4].[Si+4].[Si+4].[Si+4] ONCZQWJXONKSMM-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229910052621 halloysite Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 210000001724 microfibril Anatomy 0.000 description 1
- 239000004005 microsphere Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 239000002071 nanotube Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229940080314 sodium bentonite Drugs 0.000 description 1
- 229910000280 sodium bentonite Inorganic materials 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
- 230000002522 swelling effect Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Abstract
The invention provides a moisture-absorbing antibacterial polypropylene material and a preparation method thereof, wherein the moisture-absorbing antibacterial polypropylene material comprises the following raw materials in parts by weight: 75 to 94 portions of polypropylene, 1 to 4 portions of polyether polyol, 3 to 10 portions of ethylene-vinyl acetate copolymer, 1 to 5 portions of diatomite, 1 to 4 portions of antibacterial master batch, 0.4 to 1 portion of antioxidant and 0.4 to 1 portion of other auxiliary agents. According to the invention, the polypropylene is subjected to hydrophilization by using the polyether polyol in a melt blending manner, the hydrophilic property of the PP is obviously improved, the long-term effect of hydrophilicity is effectively improved by using the ethylene-vinyl acetate copolymerization resident polyether polyol, and the requirements of moisture absorption and antibiosis of the material can be realized under the adsorption action of the diatomite with a special porous structure.
Description
Technical Field
The invention belongs to the technical field of polypropylene materials, and particularly relates to a high-moisture-absorption antibacterial polypropylene material and a preparation method thereof.
Background
Nonwoven fabric, also called nonwoven fabric, is a fabric formed without the need for spinning woven fabric and is composed of oriented or random fibers. Three major fibers currently used in nonwoven production include polypropylene, polyester, and viscose. The polypropylene has the advantages of high strength, good elastic recovery, easy washing and drying, and good heat resistance. The polypropylene macromolecular structure does not contain hydrophilic groups, has high crystallinity, and simultaneously has a round fiber section and a compact structure, and is lack of micropores and gaps, so the polypropylene non-woven fabric has extremely poor hydrophilicity. However, some application fields have the requirement of hydrophilicity, such as the medical and health fields, disinfection wet tissues, wound dressings, bandages, gauze ball cloth and the like, and in addition, bacteria are easy to breed after sweat is soaked in non-woven fabrics, so that the non-woven fabrics are not beneficial to the health of human bodies. Therefore, the polypropylene non-woven fabric is effectively modified by moisture absorption and antibiosis by adopting a proper method so as to meet the requirements on comfort and health in the field of medical treatment and health, and the technical problem which is urgently needed to be solved by people is solved.
Patent CN106120008B relates to a moisture-absorbing antistatic polypropylene polymer material dispersed in polypropylene fiber in the form of microfibril of a moisture-absorbing antistatic nano material by blending and melting isotactic polypropylene using the super-strong adsorption property of halloysite nanotubes and superfine diatomite and the synergistic effect of sodium bentonite and a conductive material. Patent CN111636207A discloses a high moisture absorption and antibacterial nonwoven fabric based on polypropylene fiber, which is prepared by generating polyvinyl alcohol through alcoholysis of polyvinyl acetate, performing cross-linking polymerization on the surface of polypropylene fiber under the cross-linking action of cross-linking agent glutaraldehyde to generate a high molecular polymer loaded with hydrophilic hydroxyl groups, then embedding chitosan composite microspheres with strong water absorption and swelling properties into the high molecular polymer, and loading antibacterial nano zinc oxide particles, thereby improving the moisture absorption and antibacterial properties of the nonwoven fabric, but the preparation process is relatively complex.
Disclosure of Invention
The invention aims to provide a moisture-absorbing antibacterial polypropylene material and a preparation method thereof aiming at the defects of the prior art, and the material has the characteristics of excellent moisture absorption, antibacterial property and the like.
The invention adopts the following technical scheme that:
the moisture-absorbing antibacterial polypropylene material comprises the following raw materials in parts by weight: 75 to 94 portions of polypropylene, 1 to 4 portions of polyether polyol, 3 to 10 portions of ethylene-vinyl acetate copolymer, 1 to 5 portions of diatomite, 1 to 4 portions of antibacterial master batch, 0.4 to 1 portion of antioxidant and 0.4 to 1 portion of other auxiliary agents.
The polypropylene resin is at least one of homopolymerized polypropylene and random copolymerization polypropylene, and the melt flow rate is 1-60 g/10min under the test conditions of 230 ℃ and 2.16 KG;
the polyether polyol is one or a mixture of more of polypropylene oxide polyol, polyethylene oxide polyol, polymer polyol and polyether polyol copolymer.
The vinyl acetate content of the ethylene-vinyl acetate copolymer is 5-45%.
SiO of the diatomaceous earth 2 The mass content of the (B) is more than 85 percent, and the particle size is 2000-5000 meshes.
The antibacterial master batch is composed of 30% -40% of nano-silver antibacterial agent and 60% -70% of polypropylene particles.
The antioxidant is at least one of hindered phenol antioxidant, thioester antioxidant and phosphite antioxidant, the preferred hindered phenol antioxidant is antioxidant 1010, the preferred thioester antioxidant is DLTP, and the preferred phosphite antioxidant is antioxidant 168;
the other auxiliary agents include but are not limited to one or a combination of two or more of a lubricant, a dispersant and an ultraviolet absorber.
The preparation method of the moisture-absorbing antibacterial polypropylene material comprises the following steps:
adding the polypropylene resin, polyether glycol, ethylene-vinyl acetate copolymer, diatomite, antibacterial master batches, an antioxidant and other auxiliaries into a high-speed stirrer, uniformly stirring, then adding the mixture from a main feeding port of a double-screw extruder, controlling the rotating speed of a screw within the range of 300-600 r/min, the extrusion temperature of 200-230 ℃ and the vacuum degree of-0.08-0.05 MPa, and carrying out melting, extrusion, cooling and granulation to obtain the moisture-absorbing antibacterial polypropylene material.
The invention has the beneficial effects that:
1. according to the invention, the polypropylene is subjected to hydrophilization by using the polyether polyol in a melt blending manner, so that the modification of the hydrophilic property of the PP is obviously improved.
2. The invention adopts the technical scheme that the ethylene-acrylic acid copolymer (EVA) is added into the PP material, and the carboxylic acid group of the EVA partially reacts with the hydroxyl group of the polyether polyol, so that the polyether polyol is beneficial to residing. Because EVA and PP have good compatibility and extremely high adhesiveness, carboxylic acid groups of EVA and PP can partially react with hydroxyl groups of polyether polyol, so that the EVA and PP are beneficial to retaining the polyether polyol and improve the long-acting property of hydrophilic modification.
3. By adding the diatomite with a special porous structure into the polypropylene material, the characteristics of large specific surface area, large pore volume and good physical adsorption of the diatomite are utilized, and the hygroscopicity of the material is effectively improved.
4. Under the adsorption action of the diatomite with a porous structure, the antibacterial effect of temperature resistance, durability and safety of the nano metal silver particles can be better exerted.
Detailed Description
The invention is further illustrated by the following specific examples, which are intended to be illustrative only and not limiting.
The antibacterial masterbatch used in the following examples was prepared by the following method:
30 percent of nano-silver antibacterial agent and 70 percent of polypropylene particles are fed into a high-speed mixer to be uniformly mixed, and then fed into a double-screw extruder to be extruded, cooled, dried and cut into granules to obtain the nano-silver antibacterial agent.
Example 1
The moisture-absorbing antibacterial polypropylene material comprises the following raw materials in parts by weight: 94 parts of polypropylene, 1 part of polyether polyol, 3 parts of ethylene-vinyl acetate copolymer, 1 part of diatomite, 1 part of antibacterial master batch, 0.4 part of antioxidant S2225 and 0.4 part of EBS;
the preparation method comprises the following steps:
adding the polypropylene resin, polyether glycol, ethylene-vinyl acetate copolymer, diatomite, antibacterial master batch, antioxidant and other auxiliary agents into a high-speed stirrer, stirring for 10min, uniformly mixing, then feeding from a main feeding port of a double-screw extruder, controlling the rotating speed of a screw within 400r/min, the extrusion temperature to be 200-220 ℃, the vacuum degree to be-0.08-0.09 MPa, and carrying out melting, extrusion, cooling and granulation to obtain the moisture-absorbing antibacterial polypropylene material
Example 2
The moisture-absorbing antibacterial polypropylene material comprises the following raw materials in parts by weight: 86 parts of polypropylene, 2 parts of polyether polyol, 6 parts of ethylene-vinyl acetate copolymer, 3 parts of diatomite, 2 parts of antibacterial master batch, 0.6 part of antioxidant S2225 and 0.6 part of EBS;
the preparation method comprises the following steps:
adding the polypropylene resin, polyether glycol, ethylene-vinyl acetate copolymer, diatomite, antibacterial master batch, antioxidant and other auxiliaries into a high-speed stirrer, stirring for 10min, uniformly mixing, then adding the mixture into a main feeding port of a double-screw extruder, controlling the rotating speed of a screw within the range of 400r/min, the extrusion temperature to be 200-220 ℃, the vacuum degree to be-0.08-0.09 MPa, and carrying out melting, extrusion, cooling and granulation to obtain the moisture-absorbing antibacterial polypropylene material
Example 3
The moisture-absorbing antibacterial polypropylene material comprises the following raw materials in parts by weight: 83 parts of polypropylene, 3 parts of polyether polyol, 8 parts of ethylene-vinyl acetate copolymer, 3 parts of diatomite, 2 parts of antibacterial master batch, 0.6 part of antioxidant S2225 and 0.6 part of EBS;
the preparation method comprises the following steps:
adding the polypropylene resin, polyether glycol, ethylene-vinyl acetate copolymer, diatomite, antibacterial master batch, antioxidant and other auxiliary agents into a high-speed stirrer, stirring for 10min, uniformly mixing, then feeding from a main feeding port of a double-screw extruder, controlling the rotating speed of a screw within 400r/min, the extrusion temperature to be 200-220 ℃, the vacuum degree to be-0.08-0.09 MPa, and carrying out melting, extrusion, cooling and granulation to obtain the moisture-absorbing antibacterial polypropylene material
Example 4
The moisture-absorbing antibacterial polypropylene material comprises the following raw materials in parts by weight: 75 parts of polypropylene, 4 parts of polyether polyol, 10 parts of ethylene-vinyl acetate copolymer, 5 parts of diatomite, 4 parts of antibacterial master batch, 2225 parts of antioxidant S and 1 part of EBS;
the preparation method comprises the following steps:
adding the polypropylene resin, polyether glycol, ethylene-vinyl acetate copolymer, diatomite, antibacterial master batch, antioxidant and other auxiliary agents into a high-speed stirrer, stirring for 10min, uniformly mixing, then feeding from a main feeding port of a double-screw extruder, controlling the rotating speed of a screw within 400r/min, the extrusion temperature to be 200-220 ℃, the vacuum degree to be-0.08-0.09 MPa, and carrying out melting, extrusion, cooling and granulation to obtain the moisture-absorbing antibacterial polypropylene material
Comparative example 1
This comparative example differs from example 1 in that no polyether polyol is added to the polypropylene component and the other components and process steps are the same as in example 1.
Comparative example 2
The comparative example is different from example 3 in that diatomaceous earth and antibacterial mother particles are not added to the polypropylene component, and other components and process steps are the same as those of example 3.
Comparative example 3
This comparative example differs from example 4 in that no polyether polyol and no ethylene-vinyl acetate copolymer are added to the polypropylene component and the other components and process steps are the same as in example 4.
The moisture-absorbing antibacterial polypropylene materials prepared in the examples 1 to 4 and the comparative examples 1 to 3 are dried in a dynamic vacuum oven until the water content is 60ppm, are directly extruded and spun into moisture-absorbing antibacterial polypropylene fibers in a co-rotating twin-screw melt-kneading extruder, the filaments of the moisture-absorbing antibacterial polypropylene fibers are cut into polypropylene short fibers with the length of 5cm, the polypropylene short fibers are sent into an opener for loosening and carding to form a non-woven fabric fiber web, the non-woven fabric fiber web is needled and reinforced, the needle density is 2500 pieces/m < 2 >, the piercing frequency is 180 times/min, and the non-woven fabric passes through the surface of a conveying table at the conveying speed of 10m/min to obtain the moisture-absorbing antibacterial non-woven fabric.
The antibacterial rate of escherichia coli, the antibacterial rate of staphylococcus aureus, the infiltration time and the water absorption rate of the moisture-absorbing antibacterial non-woven fabric are tested according to related detection standards, and the detection results are shown in table 1:
TABLE 1 test results of examples 1-4 and comparative examples 1-3
| Example 1 | Example 2 | Example 3 | Example 4 | Comparative example 1 | Comparative example 2 | Comparative example 3 | |
| Antibacterial property-Escherichia coli/%) | 56.3 | 98.2 | 98.4 | 99.5 | 55.2 | 23 | 99.2 |
| Antibacterial property-Staphylococcus aureus/% | 55.6 | 97.5 | 97.8 | 98.7 | 52.1 | 20.1 | 98.9 |
| Soaking time s | 37.2 | 5.8 | 4.4 | 3.2 | 42.2 | 6.8 | 12 |
| Water absorption Rate%/s | 22.4 | 73 | 75 | 78 | 27.6 | 68 | 61 |
The results of the example 1 and the comparative example 1 show that the polyether polyol can remarkably improve the soaking time and the water absorption rate, the soaking time is less than 6s when 2% of the polyether polyol is added, and the water absorption rate is more than 50%.
The results of the embodiment 3 and the comparative example 2 show that the antibacterial property of the antibacterial master batch is more than 95% when more than 2% of the antibacterial master batch is added, and the infiltration time and the water absorption rate are improved to a certain extent;
the results of the embodiment 4 and the comparative example 3 show that the diatomite has a certain improvement effect on the infiltration time and the water absorption rate, and the infiltration time and the water absorption rate can be obviously improved under the compounding effect of the diatomite, the polyether polyol and the ethylene-vinyl acetate copolymer.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. The moisture-absorbing antibacterial polypropylene material is characterized by comprising the following raw materials in parts by weight:
75-94 parts of polypropylene, 1-4 parts of polyether polyol, 3-10 parts of ethylene-vinyl acetate copolymer, 1-5 parts of diatomite, 1-4 parts of antibacterial master batch, 0.4-1 part of antioxidant and 0.4-1 part of other auxiliary agents;
the polypropylene resin is at least one of homopolymerized polypropylene and random copolymerization polypropylene, and the melt flow rate is 1-60 g/10min under the test conditions of 230 ℃ and 2.16 KG.
2. The hygroscopic, antibacterial polypropylene material of claim 1, wherein said polyether polyol is one or a mixture of more of polyoxypropylene polyol, polyoxyethylene polyol, polymer polyol and copolyether polyol.
3. The hygroscopic, antibacterial polypropylene material of claim 1, wherein said ethylene-vinyl acetate copolymer has a vinyl acetate content of 5% to 45%.
4. The hygroscopic, antibacterial polypropylene material of claim 1, wherein said diatomaceous earth has SiO 2 The mass content of the (B) is more than 85 percent, and the particle size is 2000-5000 meshes.
5. The moisture-absorbing antibacterial polypropylene material according to claim 1, wherein the antibacterial masterbatch comprises 30-40% of nano-silver antibacterial agent and 60-70% of polypropylene particles.
6. The hygroscopic, antibacterial polypropylene material of claim 1, wherein said antioxidant is at least one of hindered phenol type antioxidants, thioester type antioxidants, phosphite type antioxidants.
7. The moisture-absorbing antibacterial polypropylene material according to claim 1, wherein the hindered phenol antioxidant is antioxidant 1010, the thioester antioxidant is DLTP, and the phosphite antioxidant is antioxidant 168.
8. The hygroscopic, antibacterial polypropylene material as claimed in claim 1, wherein said other auxiliary agents include but are not limited to one or a combination of two or more of lubricants, dispersants, and uv absorbers.
9. The method for preparing the moisture-absorbing antibacterial polypropylene material according to any one of claims 1 to 8, comprising the steps of:
adding the polypropylene resin, polyether glycol, ethylene-vinyl acetate copolymer, diatomite, antibacterial master batch, antioxidant and other additives into a high-speed stirrer, uniformly stirring, then adding the mixture from a main feeding port of a double-screw extruder, controlling the rotating speed of a screw within the range of 300-600 r/min, the extrusion temperature of 200-230 ℃ and the vacuum degree of-0.08-0.05 MPa, and carrying out melting, extrusion, cooling and granulation to obtain the moisture-absorbing antibacterial polypropylene material.
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| CN104264366A (en) * | 2014-08-15 | 2015-01-07 | 刁广祥 | Composite non-woven fabric and production method thereof |
| CN113717460A (en) * | 2021-07-22 | 2021-11-30 | 广东金发科技有限公司 | High-surface-hydrophilicity polypropylene composite material and preparation method and application thereof |
| CN115124790A (en) * | 2022-06-28 | 2022-09-30 | 广东春夏新材料科技股份有限公司 | Polypropylene composite material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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