CN113005635A - Application of propane-butadiene copolymerized polypropylene in preparing melt-blown fabric and preparation method thereof - Google Patents
Application of propane-butadiene copolymerized polypropylene in preparing melt-blown fabric and preparation method thereof Download PDFInfo
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- CN113005635A CN113005635A CN202110257629.4A CN202110257629A CN113005635A CN 113005635 A CN113005635 A CN 113005635A CN 202110257629 A CN202110257629 A CN 202110257629A CN 113005635 A CN113005635 A CN 113005635A
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Classifications
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- 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
- D04H1/544—Olefin series
-
- 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
- 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
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/46—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyolefins
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/13—Physical properties anti-allergenic or anti-bacterial
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/22—Physical properties protective against sunlight or UV radiation
Abstract
The invention discloses an application of polypropylene-butadiene copolymer in preparing melt-blown fabric, which comprises the following raw materials: 900000-1000000 parts of propylene-butadiene copolymer polypropylene, 300-400 parts of antioxidant, 260-320 parts of zinc stearate, 440 parts of silicone oil 380 and 15000 parts of peroxide. The invention takes the propane-butadiene copolymerized polypropylene as the raw material to prepare the melt-blown fabric, thereby improving the performance of the melt-blown fabric.
Description
Technical Field
The invention relates to the technical field of high polymer materials, in particular to application of polypropylene-propylene copolymer in preparing melt-blown fabric and the melt-blown fabric prepared by the polypropylene-propylene copolymer.
Background
The PP material suitable for melt-blown nonwoven fabric must have 3 conditions: very high melt index (greater than 400g/10min), narrow relative molecular mass distribution (MWD), very low ash. The PP raw material with high MFR can meet the requirements of the melt-blown process, the qualified superfine fiber non-woven fabric is produced, and the energy consumption can be reduced.
For the production of melt-blown non-woven fabrics, if the relative molecular mass distribution is too wide and the content of PP with low relative molecular mass is more, the more PP stress cracking is, and the non-woven fabrics are easy to break in the production process; the higher content of PP with ultrahigh relative molecular mass can increase the viscosity of PP and even generate gel particles, thus making the production of non-woven fabrics difficult. In addition, ash directly affects the screen change period during PP use.
In order to improve the performances of the polypropylene such as toughness, transparency and the like, the alpha-olefin is usually used as a comonomer for modification, but the modified material still has poor performance. If 1-butylene is used as a comonomer and polypropylene copolymerized with propane and butylene is used as a raw material for production, the performance of the melt-blown fabric can be improved.
Therefore, how to apply the propane-butane copolymerized polypropylene to the preparation of the melt-blown fabric is a problem which needs to be solved urgently by the technical personnel in the field.
Disclosure of Invention
In view of the above, the invention provides an application of polypropylene-co-polypropylene in preparing meltblown, which takes polypropylene-co-polypropylene as a raw material to prepare meltblown, thereby improving the performance of meltblown.
In order to achieve the purpose, the invention adopts the following technical scheme:
an application of propane-butane copolymer polypropylene in preparing melt-blown cloth.
The propane-butene copolymer polypropylene is polymerized by taking propylene and 1-butene as comonomers, has low odor, low precipitation, low processing temperature and excellent spinning performance and flexibility, and is very suitable for producing medical-grade and propylene melt-blown fabrics; compared with the homopolymerized polypropylene melt-blown cloth, the performance is improved.
The melt-blown fabric comprises the following raw materials in parts by weight: 900000-1000000 parts of propylene-butadiene copolymer polypropylene, 300-400 parts of antioxidant, 260-320 parts of stearate, 440 parts of silicone oil 380-15000 parts of peroxide.
The preferable technical scheme of the invention comprises the following steps: 998940 parts of propane-butadiene copolymer polypropylene powder, 360 parts of antioxidant, 300 parts of stearate, 400 parts of silicone oil and 15000 parts of peroxide.
The technical effect achieved by the technical scheme is as follows: antioxidants are a class of chemicals that, when present in only small amounts in a polymer system, retard or inhibit the polymer oxidation process, thereby preventing polymer aging and extending its useful life, and therefore, the presence of antioxidants can extend the useful life of meltblown fabrics; the stearate has a lubricating effect, and in the invention, the stearate is used as a heat stabilizer to prevent the raw materials from being denatured at high temperature in the preparation process; the silicone oil has dispersing and lubricating effects; peroxides, as a degradation agent, can break long-chain molecules into short chains.
As a preferable technical scheme of the invention, the antioxidant comprises antioxidant 1790 and antioxidant 9228, and the weight part ratio of the antioxidant 1790 to the antioxidant 9228 is 1: 5.
In a preferred embodiment of the present invention, the peroxide is di-tert-butyl peroxide, 3,6, 9-triethyl-3, 6, 9-trimethyl-1, 4, 7-triperoxonane or 2, 5-dimethyl-2, 5-di (tert-butylperoxy) hexane.
The preparation method of the melt-blown fabric is characterized by comprising the following steps:
1) weighing: weighing the raw materials according to the weight part ratio;
2) premixing: mixing and stirring the antioxidant 1790, the antioxidant 9228, the zinc stearate, the silicone oil and 1000 parts of the propane-butadiene copolymerized polypropylene powder which are weighed in the step 1) to obtain a premix;
3) and (3) granulation: mixing the premix obtained in the step 2), peroxide and the rest of the polypropylene-propylene copolymer, adding a weight-loss type auxiliary agent feeder, and extruding and granulating by a double-screw extruder to obtain material granules;
4) drying the material particles obtained in the step 3), adding the electret master batch, and spraying the mixture into melt-blown cloth by a spraying machine.
In a preferred embodiment of the present invention, in the step 2), the mixing and stirring are performed by using a stirrer for 5min at a stirring speed of 800 rpm.
As a preferred technical solution of the present invention, in step 3), the barrel temperature of the extruder is set to 80, 120, 200, 220, 190, 180, 160, 150, 160 ℃, the rotation speed is 350rpm, the die temperature is 160 ℃, and the temperature of the granulating water is 30 ℃.
As a preferable technical scheme of the invention, in the step 4), the drying temperature is 90 ℃ and the drying time is 3 hours.
As a preferable technical scheme of the invention, in the step 4), the electret master batch is added at 220-280 ℃, and the final mass fraction of the electret master batch is 1.6%.
Compared with the prior art, the melt-blown fabric prepared by using the polypropylene-propylene copolymer as the raw material has the following advantages compared with the melt-blown fabric prepared by using the homopolymerized polypropylene:
(1) low melting point, low processing temperature, excellent spinnability, excellent drawability, high productivity;
(2) the gas fumigation fading resistance and ultraviolet light resistance are realized, the ultraviolet light irradiation environment of 10-400nm is placed for 48 hours, and the change rate of the yellow index of a sample is less than 10 percent;
(3) the thermal stability is good;
(4) good barrier property, and the single-layer bacterial filtration efficiency is more than 99 percent; good electrical energy, dielectric constant of 2.3;
(5) the structure is fluffy, the pores are many and the pore size is small;
(6) compared with the homopolymerized polypropylene melt-blown material, the non-woven fabric produced by the same MFR polypropylene melt-blown material is softer in touch.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A meltblown fabric, the raw materials comprising: 998940 parts of 20 parts of propane-butadiene copolymerized polypropylene powder, 179060 parts of antioxidant, 9228300 parts of antioxidant, 300 parts of zinc stearate, 400 parts of high-temperature silicone oil and 15000 parts of di-tert-butyl peroxide.
The preparation method comprises the following steps:
(1) adding 1790 parts of antioxidant, 9228 parts of antioxidant, zinc stearate, high-temperature silicone oil and 1000 parts of polypropylene powder into a high-speed stirrer for premixing for 3min, wherein the stirring speed is 800rpm, so as to obtain a premix;
(2) the premix and the di-tert-butyl peroxide are mixed with the rest polypropylene powder, and added into a weight-loss type auxiliary agent feeder to be extruded by a double-screw extruder, wherein the temperature of a barrel of the extruder is 80, 120, 200, 220, 220, 220, 220, 190, 180, 180, 160, 160, 150, 150, 160 and 160 ℃, the rotating speed is 350rpm, the temperature of a die head is 160 ℃, the temperature of grain cutting water is 30 ℃, the flow rate of a polypropylene melt-blown material melt extruded by the extruder is 400 +/-20 g/10min, the extruded material particles are dried at 90 ℃ for 3h, and finally, the electret master batch is added to the mass fraction of 1.6% at 260 ℃, and the mixture is sprayed into cloth by a spraying machine.
Example 2
A meltblown fabric, the raw materials comprising: 900000 parts of propane-butadiene copolymer polypropylene powder with 20 melting fingers, 179050 parts of antioxidant, 9228250 parts of antioxidant, 260 parts of magnesium stearate, 380 parts of high-temperature silicone oil, and 5000 parts of 3,6, 9-triethyl-3, 6, 9-trimethyl-1, 4, 7-triperoxonane.
The preparation method comprises the following steps:
(1) adding 1790 parts of antioxidant, 9228 parts of antioxidant, magnesium stearate, high-temperature silicone oil and 1000 parts of polypropylene powder into a high-speed stirrer for premixing for 2min, wherein the stirring speed is 800rpm, so as to obtain a premix;
(2) adding the premix, 3,6, 9-triethyl-3, 6, 9-trimethyl-1, 4, 7-triperoxonane and the rest polypropylene powder into a weight-loss auxiliary agent feeder, extruding by a double-screw extruder, wherein the temperature of an extruder barrel is 80, 120, 200, 220, 220, 220, 220, 190, 180, 180, 160, 160, 150, 150, 160 and 160 ℃, the rotating speed is 350r/min, the die head temperature is 160 ℃, the temperature of a granulating water is 30 ℃, the melt flow rate of a polypropylene melt-blown material extruded by the extruder is 700 +/-50 g/10min, drying material particles at 90 ℃ after extrusion for 3h, finally adding the electret master batch particles to the mass fraction of 1.6% at 220 ℃, and spraying the mixture into cloth by a spraying machine.
Example 3
A meltblown fabric, the raw materials comprising: 1000000 parts of propane-butadiene copolymerized polypropylene powder with 20 parts of melting index, 179066.67 parts of antioxidant, 9228333.33 parts of antioxidant, 320 parts of calcium stearate, 440 parts of high-temperature silicone oil and 3000 parts of 2, 5-dimethyl-2, 5-di (tert-butylperoxy) hexane.
The preparation method comprises the following steps:
(1) adding 1790 parts of antioxidant, 9228 parts of antioxidant, calcium stearate, high-temperature silicone oil and 1000 parts of polypropylene powder into a high-speed stirrer for premixing for 5min, wherein the stirring speed is 800rpm, so as to obtain a premix;
(2) adding the premix, 2, 5-dimethyl-2, 5-di (tert-butylperoxy) hexane and the rest propane-butadiene copolymerized polypropylene powder into a weight-loss auxiliary agent feeder, extruding by a double-screw extruder, wherein the temperature of an extruder barrel is 100, 160, 210, 220, 240, 240, 230, 200, 190, 180, 160, 160, 150, 150, 160 and 160 ℃, the rotating speed is 350r/min, the die head temperature is 160 ℃, the temperature of granulating water is 30 ℃, the melt flow rate of a polypropylene melt-blown material extruded by the extruder is 1500 +/-50 g/10min, drying the material particles at 90 ℃ after extrusion for 3h, and finally adding electret master particles with the mass fraction of 1.6% at 280 ℃ and spraying the mixture into cloth by a spraying machine.
Example 4
A meltblown fabric, the raw materials comprising: 920000 parts of 20 parts of propane-butadiene copolymerized polypropylene powder, 179065 parts of antioxidant, 9228325 parts of antioxidant, 280 parts of zinc stearate, 420 parts of high-temperature silicone oil and 8000 parts of di-tert-butyl peroxide.
The preparation method comprises the following steps:
(1) adding 1790 parts of antioxidant, 9228 parts of antioxidant, zinc stearate, high-temperature silicone oil and 1000 parts of polypropylene powder into a high-speed stirrer for premixing for 2-5 min, wherein the stirring speed is 800 revolutions per minute, so as to obtain a premix;
(2) adding the premix, the di-tert-butyl peroxide and the rest of the propane-butadiene copolymer polypropylene powder into a weight-loss auxiliary feeder, extruding by a double-screw extruder, wherein the temperature of a barrel of the extruder is 100, 160, 210, 220, 240, 240, 230, 200, 190, 180, 160, 160, 150, 150, 160 and 160 ℃, the rotating speed is 350r/min, the temperature of a die head is 160 ℃, the temperature of a granulating water is 30 ℃, the melt flow rate of a polypropylene melt-blown material extruded by the extruder is 3000 +/-200 g/10min, drying the material particles at 90 ℃ after extrusion for 3h, and finally adding electret master particles with the mass fraction of 1.6% at 240 ℃ and spraying the electret master particles into cloth by a spraying machine.
Comparative example
A meltblown fabric: the raw materials comprise: 1010500 parts of antioxidant, 1681000 parts of antioxidant, 500 parts of calcium stearate, 99800 parts of homopolypropylene powder of melt fingers 20, and 9000 parts of di-tert-butyl peroxide.
The preparation method comprises the following steps:
(1) adding an antioxidant 1010, an antioxidant 168, calcium stearate and 1000 parts of polypropylene powder into a high-speed stirrer for premixing for 3min, wherein the stirring speed is 800rpm, so as to obtain a premix;
(2) adding the premix, the di-tert-butyl peroxide and the rest of the propane-butadiene copolymerized polypropylene powder into a weight-loss type auxiliary agent feeder, extruding by a double-screw extruder, wherein the temperature of a barrel of the extruder is 100, 160, 210, 220, 240, 240, 230, 200, 190, 180, 160, 160, 150, 150, 160 and 160 ℃, the rotating speed is 350r/min, the temperature of a die head is 160 ℃, the temperature of a granulating water is 30 ℃, the melt flow rate of a polypropylene melt-blown material extruded by the extruder is 1500g/10min +/-100 g/10min, drying material particles at 90 ℃ after extrusion for 3h, and finally adding 1.6 mass percent of master batches to form standing fabric by a spray machine at 240-320 ℃.
The properties of the meltblown fabrics prepared in examples 1-4 and comparative example were measured and the results are shown in table 1;
TABLE 1 meltblown Properties
Testing the ultraviolet resistance, dielectric constant and single-layer bacterial filtration efficiency of the melt-blown cloth prepared in the examples 1-4, wherein the ultraviolet resistance is the change rate of the yellow index of the sample when the melt-blown cloth is placed in an ultraviolet irradiation environment of 10-400nm for 48 hours; as shown in table 2;
TABLE 2
The MFPs, ash, volatiles, molecular weight distributions, melting points and heat distortion temperatures of the meltblown fabrics prepared in examples 1-4 were tested and the results are shown in Table 3;
TABLE 3
Wherein PPC-YM400, PPC-YM800, PPC-YM1500 and PPC-YM3000 were prepared in the same manner as in example 1, example 2, example 3 and example 4, respectively.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An application of propane-butane copolymer polypropylene in preparing melt-blown cloth.
2. The melt-blown fabric is characterized by comprising the following raw materials in parts by weight: 900000-1000000 parts of propylene-butadiene copolymer polypropylene, 300-400 parts of antioxidant, 260-320 parts of stearate, 440 parts of silicone oil 380-15000 parts of peroxide.
3. The meltblown fabric according to claim 2, comprising the following raw materials in parts by weight: 998940 parts of propane-butadiene copolymer polypropylene powder, 360 parts of antioxidant, 300 parts of stearate, 400 parts of silicone oil and 15000 parts of peroxide.
4. The meltblown according to claim 2 or 3 wherein the antioxidant comprises antioxidant 1790 and antioxidant 9228 in a ratio of 1:5 parts by weight.
5. The meltblown according to claim 4 wherein said peroxide is di-t-butyl peroxide, 3,6, 9-triethyl-3, 6, 9-trimethyl-1, 4, 7-triperoxonane or 2, 5-dimethyl-2, 5-di (t-butylperoxy) hexane.
6. The method of claim 5, comprising the steps of:
1) weighing: weighing the raw materials according to the weight part ratio;
2) premixing: mixing and stirring the antioxidant 1790, the antioxidant 9228, the zinc stearate, the silicone oil and 1000 parts of the propane-butadiene copolymerized polypropylene powder which are weighed in the step 1) to obtain a premix;
3) and (3) granulation: mixing the premix obtained in the step 2) with peroxide and the rest of the polypropylene-propylene copolymer, adding a weight-loss type auxiliary agent feeder, and extruding and granulating by a double-screw extruder to obtain material granules;
4) drying the material particles obtained in the step 3), adding the electret master batch, and spraying the mixture into melt-blown cloth by a spraying machine.
7. The method of claim 6, wherein the mixing and stirring in step 2) is performed by a blender at a stirring speed of 800rpm for 5 min.
8. The method of claim 6, wherein in step 3), the barrel temperature of the extruder is set to 80, 120, 200, 220, 190, 180, 160, 150, 160 ℃ and the rotation speed is 350 rpm.
9. The method of claim 6, wherein the drying step in step 4) is carried out at 90 ℃ for 3 hours.
10. The preparation method of the meltblown fabric according to claim 6, wherein in the step 4), the electret master batch is added at 220-280 ℃, and the final mass fraction of the electret master batch is 1.6%.
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