CN112080065A - Production formula and process of special modified polypropylene for melt-blown fabric - Google Patents
Production formula and process of special modified polypropylene for melt-blown fabric Download PDFInfo
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- CN112080065A CN112080065A CN202010804193.1A CN202010804193A CN112080065A CN 112080065 A CN112080065 A CN 112080065A CN 202010804193 A CN202010804193 A CN 202010804193A CN 112080065 A CN112080065 A CN 112080065A
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- 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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/14—Peroxides
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- 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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/13—Phenols; Phenolates
- C08K5/134—Phenols containing ester groups
- C08K5/1345—Carboxylic esters of phenolcarboxylic acids
-
- 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
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/524—Esters of phosphorous acids, e.g. of H3PO3
- C08K5/526—Esters of phosphorous acids, e.g. of H3PO3 with hydroxyaryl compounds
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- 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
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- 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
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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
- D04H1/42—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 characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4282—Addition polymers
- D04H1/4291—Olefin series
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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
- D04H1/56—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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/12—Applications used for fibers
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention relates to the technical field of new materials, in particular to a production formula and a process of modified polypropylene special for melt-blown fabric. The technical scheme adopted by the invention is as follows: the antioxidant consists of 99.4 percent of PP, 0.4 percent of di-tert-butyl peroxide (DTBP) and 0.2 percent of antioxidant mixture, wherein the 0.2 percent of antioxidant consists of antioxidant 168 and antioxidant 1010 according to the ratio of 2: 1, the processing is finished in a closed space through 7 steps during processing, the mixture is injected from a feed inlet of one area of the extruder by a peristaltic pump, and the processing temperature of different sections of the extruder is controlled. The invention has the advantages that: the ash content of the product is smaller, the residual content of the di-tert-butyl peroxide (DTBP) is lower, the potential safety hazard which is possibly generated in the mixing process of the traditional process can be avoided, and the fluctuation range of the melt index of the finished product is smaller.
Description
Technical Field
The invention relates to the technical field of new materials, in particular to a production formula and a process of modified polypropylene special for melt-blown fabric.
Background
With the continuous development of epidemic situations, products such as medical masks and protective clothing in the world are seriously lacked, and the main reason is that the melt-blown fabric resources of the core materials of the masks and the protective clothing are scarce. The melt-blown fabric with high barrier rate needs to meet the requirements of high-melt index modified polypropylene specially used for melt-blown fabric production besides good equipment. The conventional methods for modifying polypropylene with high melt index include hydrogen regulation and degradation. The hydrogen regulation method has large equipment investment and higher technical degree, and is not suitable for production of medium and small enterprises. The degradation method has small equipment investment but has higher requirements on production technology.
Disclosure of Invention
The invention aims to provide a production formula and a process of special modified polypropylene for melt-blown cloth, the process adopts a peroxide degradation method to meet the requirement that the melt index of a finished product reaches 1500 +/-50 (g/10min), a proper amount of compound antioxidant needs to be added in the production formula to terminate the reaction and absorb free radicals generated in the aging process of polypropylene, a closed process is adopted for production in the production process, the reaction humidity of different sections of an extruder is controlled, and a weight loss system and a cooling and air knife system after the finished product are matched to ensure that the ash content of the final product is smaller, the residual content of di-tert-butyl peroxide (DTBP) is lower, meanwhile, the uncontrollable potential safety hazard possibly generated in the material mixing process in the traditional process can be avoided, and the melt index fluctuation range of the finished product is smaller.
The technical scheme of the invention is as follows:
a production formula of modified polypropylene special for melt-blown fabric is characterized in that: the antioxidant consists of 99.4 percent of PP, 0.4 percent of di-tert-butyl peroxide (DTBP) and 0.2 percent of antioxidant mixture, wherein the 0.2 percent of antioxidant consists of antioxidant 168 and antioxidant 1010 according to the ratio of 2: 1, and mixing the components in a ratio of 1.
A production process of a production formula of modified polypropylene special for melt-blown fabric is characterized by comprising the following steps: 1) uniformly mixing the PP raw material and the antioxidant mixture in a 200L mixing pot for 3min, and uniformly and uninterruptedly stirring in the process; 2) respectively putting corresponding materials into bins of a weightless feeding system, and setting corresponding proportions through a control system; 3) setting the rotating speed of the extruder at 450r/min, controlling the temperature of each functional area of a main machine of the extruder to be 190-240 ℃, and feeding the powder material into the extruder through a feeding system; 4) injecting the di-tert-butyl peroxide (DTBP) from a feed inlet in the first area of the extruder by using a peristaltic pump; 5) extruding the material flow from the machine head to form a strip-shaped mixture after passing through each functional area; 6) cooling the mixture through a water tank, removing surface moisture through an air knife, and then entering a granulator; 7) screening the material passing through the granulator through a vibrating screen to form a finished product with uniform particle size; the flow rate of the weight-loss feeding system material is 40-150 kg/h; the precision of the peristaltic pump is 0.01 ml; the extruder has an L/D (length to diameter) greater than 60; the humidity of the vacuum exhaust section of the extruder is 240 ℃, and the whole processing process is finished in a closed space
Further, the humidity of the melting zone of the extruder is 200 ℃, and the humidity of the mixing section of the extruder is 220-230 ℃.
Furthermore, the finished product is matched with a blowing system fan to complete blowing operation in the machining process, and detachable filter cloth is matched at the air inlet of the blowing system fan.
The invention has the beneficial effects that:
the process adopts a peroxide degradation method, the melt index of a finished product reaches 1500 +/-50 (g/10min), a proper amount of compound antioxidant needs to be added in a production formula to terminate the reaction and absorb free radicals generated in the aging process of polypropylene, a closed process is adopted for production in the production process, the reaction humidity of different sections of an extruder is controlled, and a weight loss system and a cooling and air knife system after the finished product are matched to ensure that the ash content of the final product is smaller, the residual content of di-tert-butyl peroxide (DTBP) is lower, the uncontrollable potential safety hazard possibly generated in the mixing process of the traditional process can be avoided, and the melt index fluctuation range of the finished product is smaller.
Drawings
FIG. 1 is a graph of performance measurements of a product produced in accordance with the present invention;
Detailed Description
A production formula of modified polypropylene special for melt-blown fabric is characterized in that: the antioxidant consists of 99.4 percent of PP, 0.4 percent of di-tert-butyl peroxide (DTBP) and 0.2 percent of antioxidant mixture, wherein the 0.2 percent of antioxidant consists of antioxidant 168 and antioxidant 1010 according to the ratio of 2: 1, and mixing the components in a ratio of 1.
A production process of a production formula of modified polypropylene special for melt-blown fabric is characterized by comprising the following steps: 1) uniformly mixing the PP raw material and the antioxidant mixture in a 200L mixing pot for 3min, and uniformly and uninterruptedly stirring in the process; 2) respectively putting corresponding materials into bins of a weightless feeding system, and setting corresponding proportions through a control system; 3) setting the rotating speed of the extruder at 450r/min, controlling the temperature of each functional area of a main machine of the extruder to be 190-240 ℃, and feeding the powder material into the extruder through a feeding system; 4) injecting the di-tert-butyl peroxide (DTBP) from a feed inlet in the first area of the extruder by using a peristaltic pump; 5) extruding the material flow from the machine head to form a strip-shaped mixture after passing through each functional area; 6) cooling the mixture through a water tank, removing surface moisture through an air knife, and then entering a granulator; 7) screening the material passing through the granulator through a vibrating screen to form a finished product with uniform particle size; the flow rate of the weight-loss feeding system material is 40-150 kg/h; the precision of the peristaltic pump is 0.01ml, ensuring its precision of use. The L/D (length-diameter ratio) of the extruder is more than 60, and the DTBP residue in a finished product can be ensured to be less than or equal to 5 ppm. After the product is granulated for the second time, the molten finger can still keep 1500 +/-50 (g/10min), and the overall performance of the finished product is greatly improved. The humidity of the vacuum exhaust section of the extruder is 240 ℃, and the whole processing process is finished in a closed space. It is common practice to mix the PP raw material, the antioxidant and the DTBP using a mixer and then feed them into an extruder. Heat is generated in the mixing process, and the DTBP volatilizes after being heated, so that the activity of the DTBP is influenced. Static electricity may be generated in the material mixing process, volatile matters of DTBP may explode after encountering the static electricity, and the whole material mixing process is safe and uncontrollable. In the process, the DTBP is injected into an extruder by a peristaltic pump. The activity of DTBP can not be reduced, and simultaneously the potential safety hazard which is possibly uncontrollable in the mixing process of the traditional process can be avoided. In the production process, a high negative pressure vacuum system is adopted to suck away small molecular weight substances generated in the degradation process; in addition, an independently developed air knife system is adopted, so that moisture brought up from the cooling water tank in the bracing process can be well removed.
As shown in figure 1, the final product is detected by a melt flow rate instrument, a gas chromatograph and a gel chromatograph, the residual content of the di-tert-butyl peroxide (DTBP) is far lower than the traditional performance index of 3-4.5, the melt flow rate of the product is more stable and can reach within +/-15, and the traditional performance is about +/-80, so that the overall performance is greatly improved, the quality of other products produced at the later stage is better, and the safety is more reliable.
Preferably, the melting zone of the extruder has a humidity of 200 ℃, so that the PP resin can be rapidly melted, the efficiency in the processing process is higher, and the quality in the material processing process is more guaranteed. The humidity of the mixing section of the extruder is 220-230 ℃, the temperature of the material uniform exhaust section is increased as much as possible, and the DTBP which does not participate in the reaction can be sucked away in vacuum, so that the safety in the whole treatment process can be better ensured.
Preferably, the finished product is matched with a blowing system fan to complete blowing operation in the processing process, and the position of an air inlet of the blowing system fan is matched with detachable filter cloth, so that the ash content problem during conveying of the finished product can reach less than or equal to 0.02%, and the final performance of the finished product can be further improved.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications or substitutions can be made without departing from the principle of the present invention, and these modifications or substitutions should also be considered as the protection scope of the present invention.
Claims (4)
1. A production formula of modified polypropylene special for melt-blown fabric is characterized in that: the antioxidant consists of 99.4 percent of PP, 0.4 percent of di-tert-butyl peroxide (DTBP) and 0.2 percent of antioxidant mixture, wherein the 0.2 percent of antioxidant consists of antioxidant 168 and antioxidant 1010 according to the ratio of 2: 1, and mixing the components in a ratio of 1.
2. The production process of the production formula of the modified polypropylene specially used for melt-blown fabric according to claim 1, which is characterized by comprising the following steps: 1) uniformly mixing the PP raw material and the antioxidant mixture in a 200L mixing pot for 3min, and uniformly and uninterruptedly stirring in the process; 2) respectively putting corresponding materials into bins of a weightless feeding system, and setting corresponding proportions through a control system; 3) setting the rotating speed of the extruder at 450r/min, controlling the temperature of each functional area of a main machine of the extruder to be 190-240 ℃, and feeding the powder material into the extruder through a feeding system; 4) injecting the di-tert-butyl peroxide (DTBP) from a feed inlet in the first area of the extruder by using a peristaltic pump; 5) extruding the material flow from the machine head to form a strip-shaped mixture after passing through each functional area; 6) cooling the mixture through a water tank, removing surface moisture through an air knife, and then entering a granulator; 7) screening the material passing through the granulator through a vibrating screen to form a finished product with uniform particle size; the flow rate of the weight-loss feeding system material is 40-150 kg/h; the precision of the peristaltic pump is 0.01 ml; the extruder has an L/D (length to diameter) greater than 60; the humidity of the vacuum exhaust section of the extruder is 240 ℃, and the whole processing process is finished in a closed space.
3. The production process of the special modified polypropylene for melt-blown cloth according to claim 2, which is characterized in that: the humidity of the melting zone of the extruder is 200 ℃, and the humidity of the mixing section of the extruder is 220-230 ℃.
4. The production process of the special modified polypropylene for melt-blown cloth according to claim 2, which is characterized in that: and in the processing process, the finished product is matched with a blowing system fan to complete blowing operation, and detachable filter cloth is matched at the air inlet of the blowing system fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010804193.1A CN112080065A (en) | 2020-08-11 | 2020-08-11 | Production formula and process of special modified polypropylene for melt-blown fabric |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010804193.1A CN112080065A (en) | 2020-08-11 | 2020-08-11 | Production formula and process of special modified polypropylene for melt-blown fabric |
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| Publication Number | Publication Date |
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| CN112080065A true CN112080065A (en) | 2020-12-15 |
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| CN202010804193.1A Pending CN112080065A (en) | 2020-08-11 | 2020-08-11 | Production formula and process of special modified polypropylene for melt-blown fabric |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113912945A (en) * | 2021-12-08 | 2022-01-11 | 中化泉州能源科技有限责任公司 | Low-ash low-odor high-melt-index polypropylene with narrow molecular weight distribution and preparation method thereof |
| CN114292464A (en) * | 2021-11-24 | 2022-04-08 | 富海(东营)新材料科技有限公司 | Method for producing high-flow polypropylene by using reactive extrusion equipment |
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| CN102675732A (en) * | 2011-03-10 | 2012-09-19 | 北京伊士通新材料发展有限公司 | Polypropylene mixture, and preparation method and application thereof |
| CN106317628A (en) * | 2016-08-25 | 2017-01-11 | 天津华今集团有限公司 | High performance coating grade polypropylene resin |
| CN109503935A (en) * | 2018-12-14 | 2019-03-22 | 大韩道恩高分子材料(上海)有限公司 | A kind of low smell high transparency super-high fluidity polypropylene and its preparation facilities and method |
| CN111300680A (en) * | 2020-03-11 | 2020-06-19 | 道恩高材(北京)科技有限公司 | Equipment and method for preparing ultralong anti-aging melt-blown polypropylene material and material obtained by equipment and method |
| CN111499970A (en) * | 2020-04-21 | 2020-08-07 | 广州市聚赛龙工程塑料股份有限公司 | Electret modified polypropylene material special for melt-blown non-woven fabric applicable to mask and preparation method thereof |
| CN111499979A (en) * | 2020-06-16 | 2020-08-07 | 江苏金发科技新材料有限公司 | Melt-blown polypropylene composition and preparation method and application thereof |
-
2020
- 2020-08-11 CN CN202010804193.1A patent/CN112080065A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102675732A (en) * | 2011-03-10 | 2012-09-19 | 北京伊士通新材料发展有限公司 | Polypropylene mixture, and preparation method and application thereof |
| CN106317628A (en) * | 2016-08-25 | 2017-01-11 | 天津华今集团有限公司 | High performance coating grade polypropylene resin |
| CN109503935A (en) * | 2018-12-14 | 2019-03-22 | 大韩道恩高分子材料(上海)有限公司 | A kind of low smell high transparency super-high fluidity polypropylene and its preparation facilities and method |
| CN111300680A (en) * | 2020-03-11 | 2020-06-19 | 道恩高材(北京)科技有限公司 | Equipment and method for preparing ultralong anti-aging melt-blown polypropylene material and material obtained by equipment and method |
| CN111499970A (en) * | 2020-04-21 | 2020-08-07 | 广州市聚赛龙工程塑料股份有限公司 | Electret modified polypropylene material special for melt-blown non-woven fabric applicable to mask and preparation method thereof |
| CN111499979A (en) * | 2020-06-16 | 2020-08-07 | 江苏金发科技新材料有限公司 | Melt-blown polypropylene composition and preparation method and application thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114292464A (en) * | 2021-11-24 | 2022-04-08 | 富海(东营)新材料科技有限公司 | Method for producing high-flow polypropylene by using reactive extrusion equipment |
| CN113912945A (en) * | 2021-12-08 | 2022-01-11 | 中化泉州能源科技有限责任公司 | Low-ash low-odor high-melt-index polypropylene with narrow molecular weight distribution and preparation method thereof |
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Application publication date: 20201215 |