CN113684557A - Polylactic acid melt-spraying material and preparation method and application thereof - Google Patents
Polylactic acid melt-spraying material and preparation method and application thereof Download PDFInfo
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- CN113684557A CN113684557A CN202110990267.XA CN202110990267A CN113684557A CN 113684557 A CN113684557 A CN 113684557A CN 202110990267 A CN202110990267 A CN 202110990267A CN 113684557 A CN113684557 A CN 113684557A
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- polylactic acid
- melt
- chain extender
- tert
- blown
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- 229920000747 poly(lactic acid) Polymers 0.000 title claims abstract description 50
- 239000004626 polylactic acid Substances 0.000 title claims abstract description 50
- 239000000463 material Substances 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 238000005507 spraying Methods 0.000 title description 5
- 239000004970 Chain extender Substances 0.000 claims abstract description 27
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 18
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 18
- 239000002131 composite material Substances 0.000 claims abstract description 16
- 239000002667 nucleating agent Substances 0.000 claims abstract description 15
- DMWVYCCGCQPJEA-UHFFFAOYSA-N 2,5-bis(tert-butylperoxy)-2,5-dimethylhexane Chemical compound CC(C)(C)OOC(C)(C)CCC(C)(C)OOC(C)(C)C DMWVYCCGCQPJEA-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 11
- FGHOOJSIEHYJFQ-UHFFFAOYSA-N (2,4-ditert-butylphenyl) dihydrogen phosphite Chemical compound CC(C)(C)C1=CC=C(OP(O)O)C(C(C)(C)C)=C1 FGHOOJSIEHYJFQ-UHFFFAOYSA-N 0.000 claims abstract description 6
- WPMYUUITDBHVQZ-UHFFFAOYSA-N 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoic acid Chemical compound CC(C)(C)C1=CC(CCC(O)=O)=CC(C(C)(C)C)=C1O WPMYUUITDBHVQZ-UHFFFAOYSA-N 0.000 claims abstract description 6
- -1 pentaerythritol ester Chemical class 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- 239000000155 melt Substances 0.000 claims description 9
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- 229920001896 polybutyrate Polymers 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 238000001291 vacuum drying Methods 0.000 claims description 4
- 239000012745 toughening agent Substances 0.000 claims description 3
- 229920000459 Nitrile rubber Polymers 0.000 claims description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 claims description 2
- 229920002689 polyvinyl acetate Polymers 0.000 claims description 2
- 239000011118 polyvinyl acetate Substances 0.000 claims description 2
- 238000009472 formulation Methods 0.000 claims 1
- 239000000454 talc Substances 0.000 claims 1
- 229910052623 talc Inorganic materials 0.000 claims 1
- 239000002994 raw material Substances 0.000 abstract description 12
- 239000004744 fabric Substances 0.000 abstract description 10
- 230000000052 comparative effect Effects 0.000 description 11
- 238000001914 filtration Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- GOLXRNDWAUTYKT-UHFFFAOYSA-N 3-(1H-indol-3-yl)propanoic acid Chemical compound C1=CC=C2C(CCC(=O)O)=CNC2=C1 GOLXRNDWAUTYKT-UHFFFAOYSA-N 0.000 description 1
- AOJJSUZBOXZQNB-VTZDEGQISA-N 4'-epidoxorubicin Chemical compound O([C@H]1C[C@@](O)(CC=2C(O)=C3C(=O)C=4C=CC=C(C=4C(=O)C3=C(O)C=21)OC)C(=O)CO)[C@H]1C[C@H](N)[C@@H](O)[C@H](C)O1 AOJJSUZBOXZQNB-VTZDEGQISA-N 0.000 description 1
- 239000004594 Masterbatch (MB) Substances 0.000 description 1
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound 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 description 1
- 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 compound 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 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- SEOVTRFCIGRIMH-UHFFFAOYSA-N indole-3-acetic acid Chemical compound C1=CC=C2C(CC(=O)O)=CNC2=C1 SEOVTRFCIGRIMH-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
- D01F6/92—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyesters
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/542—Adhesive fibres
- D04H1/55—Polyesters
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/56—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving in association with fibre formation, e.g. immediately following extrusion of staple fibres
Abstract
The invention provides a polylactic acid melt-blown material and a preparation method and application thereof, wherein the polylactic acid melt-blown material comprises the following components in percentage by mass: 84-91% of polylactic acid, 5-8% of 2, 5-dimethyl-2, 5-di (tert-butylperoxy) hexane, 0.1-0.4% of nano nucleating agent, 1-5% of chain extender, 1-5% of flexibilizer and 0.1-0.5% of composite antioxidant; the chain extender is selected from a basf ADR chain extender; the composite antioxidant is selected from a mixture of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester and tri [2, 4-di-tert-butylphenyl ] phosphite. Under the combined action of the raw materials, the melt-blown material provided by the invention has a higher melt index, and the processability of the material is improved. The melt-blown material uses polylactic acid as a main material and has biodegradability. The melt-blown cloth prepared by the melt-blown material has higher adsorbability.
Description
Technical Field
The invention belongs to the technical field of melt-blown materials, and particularly relates to a polylactic acid melt-blown material, and a preparation method and application thereof.
Background
The demand for masks and protective clothing has increased dramatically. However, the common disposable medical masks and protective clothing in the market mostly adopt non-degradable olefin polymers, which brings great harm to the environment.
Disclosure of Invention
In view of the above, the present invention aims to provide a polylactic acid meltblown having a high melt index, a method for preparing the same, and an application thereof.
The invention provides a polylactic acid melt-spraying material which comprises the following components in parts by mass:
84-91% of polylactic acid, 5-8% of 2, 5-dimethyl-2, 5-di (tert-butylperoxy) hexane, 0.1-0.4% of nano nucleating agent, 1-5% of chain extender, 1-5% of flexibilizer and 0.1-0.5% of composite antioxidant;
the chain extender is selected from a basf ADR chain extender;
the composite antioxidant is selected from a mixture of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester and tri [2, 4-di-tert-butylphenyl ] phosphite.
In the present invention, the toughening agent is selected from one or more of nitrile rubber, polyvinyl butyral, polyvinyl acetate and PBAT.
The chain extender and the toughening agent act together to improve the processing performance and the mechanical property of the hot spraying material.
In the present invention, the 2, 5-dimethyl-2, 5-bis (t-butylperoxy) hexane, as a peroxide, can promote the cleavage of polylactic acid, and the molecular weight becomes small, so that the melt index becomes large. The degradation of the polylactic acid can be promoted under the action of high temperature and double-screw shearing force.
In the invention, the nano nucleating agent is selected from nano talcum powder and/or nano calcium carbonate. The nano nucleating agent improves the crystallization speed of the material, improves the production efficiency, reduces the molding shrinkage of the material, and lays a cushion for the performance stability of the melt-blown fabric at the subsequent preparation position.
In the present invention, the chain extender is selected from basf ADR 4400.
In the invention, the molecular weight of the polylactic acid is 160000-170000 g/mol. The polylactic acid is selected from PLA 110. The polylactic acid is used as a main material, so that the melt-blown material can be biodegraded.
In a specific embodiment of the invention, the polylactic acid melt-blown material comprises the following components in parts by mass:
87.5 percent of polylactic acid, 7 percent of 2, 5-dimethyl-2, 5-di (tert-butylperoxy) hexane, 0.2 percent of nano nucleating agent, 2 percent of chain extender, 3 percent of flexibilizer and 0.3 percent of composite antioxidant;
or comprises 90.3 percent of polylactic acid, 6 percent of 2, 5-dimethyl-2, 5-di (tert-butylperoxy) hexane, 0.3 percent of nano nucleating agent, 2 percent of chain extender, 1 percent of flexibilizer and 0.4 percent of composite antioxidant;
or comprises 84.3 percent of polylactic acid, 8 percent of 2, 5-dimethyl-2, 5-di (tert-butylperoxy) hexane, 0.3 percent of nano nucleating agent, 3 percent of chain extender, 4 percent of flexibilizer and 0.4 percent of composite antioxidant;
the chain extender is selected from a basf ADR chain extender;
the composite antioxidant is selected from a mixture of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester and tri [2, 4-di-tert-butylphenyl ] phosphite in a mass ratio of 1: 2.
The invention provides a preparation method of the polylactic acid melt-blown material, which comprises the following steps:
blending 84-91% of polylactic acid, 5-8% of 2, 5-dimethyl-2, 5-di (tert-butylperoxy) hexane, 0.1-0.4% of nano nucleating agent, 1-5% of chain extender, 1-5% of flexibilizer and 0.1-0.5% of composite antioxidant for 15-25 min, melting and blending, granulating and vacuum drying to obtain the polylactic acid melt-blown material.
In the invention, the temperature of the melt blending is 165-190 ℃, and the rotating speed of the melt blending is 25-35 rpm.
The rotation speed of the granulation is 55-65 rpm. The temperature of vacuum drying is 45 ℃, and the time is 10-12 h.
The invention provides an application of the polylactic acid spray material in the technical scheme or the polylactic acid spray material prepared by the preparation method in the technical scheme in the preparation of masks or protective clothing.
The invention provides a polylactic acid melt-spraying material which comprises the following components in parts by mass: 84-91% of polylactic acid, 5-8% of 2, 5-dimethyl-2, 5-di (tert-butylperoxy) hexane, 0.1-0.4% of nano nucleating agent, 1-5% of chain extender, 1-5% of flexibilizer and 0.1-0.5% of composite antioxidant; the chain extender is selected from a basf ADR chain extender; the composite antioxidant is selected from a mixture of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester and tri [2, 4-di-tert-butylphenyl ] phosphite. Under the combined action of the raw materials, the melt-blown material provided by the invention has a higher melt index, and the processability of the material is improved. The melt-blown material uses polylactic acid as a main material and has biodegradability. The melt-blown cloth prepared from the melt-blown material has high adsorbability.
Detailed Description
In order to further illustrate the present invention, a polylactic acid meltblown and a method for preparing and using the same are described in detail with reference to the following examples, which should not be construed as limiting the scope of the present invention.
The raw materials used in the following examples and comparative examples were all vacuum dried at 45 ℃ for 4-6 hours.
Examples 1 to 3
Blending the raw materials according to the mixture ratio in the table 1 for 20min at normal temperature, adding the mixture into a double-screw extruder, setting the blending temperature to be 185 ℃, the die head temperature to be 180 ℃ and the screw rotation speed to be 30r/min, carrying out water cooling and air blower drying on the extruded material, cutting the extruded material into granules by a granulator at the cutting speed of 60r/min, and carrying out vacuum drying on the obtained granules at the temperature of 45 ℃ for 10-12 h to obtain the polylactic acid melt-blown material.
TABLE 1 raw materials and amounts used in examples 1-3
| Raw materials | Example 1 | Example 2 | Example 3 |
| Polylactic acid (PLA110) | 87.5％ | 90.3％ | 84.3％ |
| 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane | 7％ | 6％ | 8％ |
| Nucleating agent (Talcum powder) | 0.2％ | 0.3％ | 0.3％ |
| Chain extender (ADR4400) | 2％ | 2％ | 3％ |
| Flexibilizer (PBAT) | 3％ | 1％ | 4％ |
| Antioxidant 1010 | 0.1％ | 0.2％ | 0.2％ |
| Antioxidant 168 | 0.2％ | 0.2％ | 0.2％ |
Comparative example 1
The process is the same as the process of the example 1, except that the adopted raw materials have different proportions, and is shown in the following table 2:
TABLE 2 raw materials and amounts for comparative example 1
Comparative example 2
The same process as in example 1, except that the types and amounts of the raw materials used are shown in Table 3:
TABLE 3 kinds and amounts of raw materials used in comparative example 2
| Raw materials | Comparative example 1 |
| Polylactic acid (PLA110) | 87.5％ |
| 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane | 7％ |
| Nucleating agent (Talcum powder) | 0.2％ |
| Chain extender (ADR4400) | 2％ |
| Flexibilizer (PBAT) | 3％ |
| Antioxidant B226 | 0.1％ |
| Antioxidant 126 | 0.2％ |
The melt-blown fabric prepared in the embodiments 1-3 and the comparative examples 1-2 is prepared into the melt-blown fabric by adopting a conventional process:
when the embodiment of the invention is processed, the polylactic acid melt-blown materials prepared in the embodiment and the comparative example are premixed with the electret master batch respectively according to the mass ratio of 97:3 in a high-speed mixer. The mixture is sheared and blended by a double-screw extruder, then extruded by a machine head, and is discharged out of a spinneret plate after being dragged by hot air, and the mixture is collected and conveyed by a rotary screen, is subjected to high-voltage electricity holding, and then is cut and rolled into coils to prepare melt-blown cloth for a KN95 mask (which can be called as KN95 mask melt-blown cloth).
The melt index of the melt-blown material is tested by the following method; the invention adopts the following method to test the adsorbability of the melt-blown fabric:
the Melt Index (Melt Flow Index, MI or MFI) as described above means a value indicating the Flow property at the time of processing a plastic material, and was originally established by the American society for measuring and standardization according to the method of identifying the properties of plastics which is commonly used by Dupont (DuPont, Inc.) in the United states. MI is generally measured according to ASTM D1238, by weight (in grams) of the melt adhesive flowing out through a pipe of a given diameter under a given load (Kg) and temperature (deg.C) for a given time (10 minutes). The larger the MI value, the better the flowability of the plastic; otherwise, the fluidity is worse.
By definition in GB 2626-2006, the filtration efficiency (filter efficiency) is meant the percentage of particulate matter that the filter element filters out under the specified test conditions. The measuring principle is that when air with a certain flow passes through the mask filtering material, the quantity or concentration of particles inside and outside the mask or on two sides of the mask is measured, and the ratio of the quantity/concentration of the particles inside the mask to the quantity/concentration of the particles outside the mask is the filtering efficiency.
Table 4 melt-blown material melt index prepared in examples 1 to 3 and comparative examples 1 to 2 and salt particulate matter filtration efficiency test results of the prepared melt-blown fabric:
| case(s) | Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 |
| Melt index (g/10min) | 1632 | 1546 | 1722 | 425 | 1621 |
| Filtration efficiency/% of salt particles | 99.2 | 99.0 | 99.5 | 90.3 | 95.0 |
From the above examples, the present invention provides a polylactic acid melt-blown material, which comprises the following components by mass: 84-91% of polylactic acid, 5-8% of 2, 5-dimethyl-2, 5-di (tert-butylperoxy) hexane, 0.1-0.4% of nano nucleating agent, 1-5% of chain extender, 1-5% of flexibilizer and 0.1-0.5% of composite antioxidant; the chain extender is selected from a basf ADR chain extender; the composite antioxidant is selected from a mixture of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester and tri [2, 4-di-tert-butylphenyl ] phosphite. Under the combined action of the raw materials, the melt-blown material provided by the invention has a higher melt index, and the processability of the material is improved. The melt-blown material uses polylactic acid as a main material and has biodegradability. The melt-blown cloth prepared by the melt-blown material has higher adsorbability. The experimental results show that: the melt index is 1500-1800 g/10 min; the filtering efficiency of the salt particles is basically kept above 99%.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. The polylactic acid melt-blown material comprises the following components in parts by mass:
84-91% of polylactic acid, 5-8% of 2, 5-dimethyl-2, 5-di (tert-butylperoxy) hexane, 0.1-0.4% of nano nucleating agent, 1-5% of chain extender, 1-5% of flexibilizer and 0.1-0.5% of composite antioxidant;
the chain extender is selected from a basf ADR chain extender;
the composite antioxidant is selected from a mixture of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester and tri [2, 4-di-tert-butylphenyl ] phosphite.
2. The polylactic acid meltblown according to claim 1 wherein the toughening agent is selected from one or more of nitrile rubber, polyvinyl butyral, polyvinyl acetate and PBAT.
3. The polylactic acid meltblown according to claim 1, wherein the nano-nucleating agent is selected from nano-talc and/or nano calcium carbonate.
4. The polylactic acid melt-blown formulation according to claim 1, wherein the chain extender is selected from basf ADR 4400.
5. The polylactic acid meltblown according to claim 1, wherein the molecular weight of the polylactic acid is 160000-170000 g/mol.
6. A method for preparing the polylactic acid melt-blown material according to any one of claims 1 to 5, comprising the following steps:
blending 84-91% of polylactic acid, 5-8% of 2, 5-dimethyl-2, 5-di (tert-butylperoxy) hexane, 0.1-0.4% of nano nucleating agent, 1-5% of chain extender, 1-5% of flexibilizer and 0.1-0.5% of composite antioxidant for 15-25 min, melting and blending, granulating and vacuum drying to obtain the polylactic acid melt-blown material.
7. The preparation method according to claim 6, wherein the melt blending temperature is 165-190 ℃ and the rotation speed of the melt blending is 25-35 rpm.
8. Use of the polylactic acid spray according to any one of claims 1 to 5 or the polylactic acid spray prepared by the preparation method according to any one of claims 6 to 7 in the preparation of masks or protective clothing.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114181506A (en) * | 2021-12-27 | 2022-03-15 | 中广核俊尔(浙江)新材料有限公司 | Preparation method and application of toughened ultrahigh-fluidity polylactic acid |
| CN114316536A (en) * | 2022-02-08 | 2022-04-12 | 北京纳通医学研究院有限公司 | Melt-blown material and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN114316536B (en) * | 2022-02-08 | 2023-11-03 | 北京纳通医学研究院有限公司 | Melt-blown material and preparation method and application thereof |
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