CN111702982A - Preparation method of high-MFR polypropylene melt-blown special material - Google Patents

Preparation method of high-MFR polypropylene melt-blown special material Download PDF

Info

Publication number
CN111702982A
CN111702982A CN202010398770.1A CN202010398770A CN111702982A CN 111702982 A CN111702982 A CN 111702982A CN 202010398770 A CN202010398770 A CN 202010398770A CN 111702982 A CN111702982 A CN 111702982A
Authority
CN
China
Prior art keywords
polypropylene
melt
blown
special material
material according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202010398770.1A
Other languages
Chinese (zh)
Inventor
黄振
申乾成
申辉
申暮春
黄自豪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anhui Guanhong Plastic Industry Co ltd
Original Assignee
Anhui Guanhong Plastic Industry Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Anhui Guanhong Plastic Industry Co ltd filed Critical Anhui Guanhong Plastic Industry Co ltd
Priority to CN202010398770.1A priority Critical patent/CN111702982A/en
Publication of CN111702982A publication Critical patent/CN111702982A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/02—Making granules by dividing preformed material
    • B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/10—Conditioning or physical treatment of the material to be shaped by grinding, e.g. by triturating; by sieving; by filtering
    • 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
    • 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
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/315—Compounds containing carbon-to-nitrogen triple bonds
    • 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
    • C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
    • C08K5/45—Heterocyclic compounds having sulfur in the ring
    • 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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Textile Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

The invention discloses a preparation method of a high MFR polypropylene melt-blown special material, which relates to the technical field of melt-blown non-woven fabric processing, takes polypropylene as a base material, cuts molecular chains of low MFR polypropylene by adding peroxide, reduces the molecular weight, improves the fluidity of a melt, thereby producing the polypropylene melt-blown special material with the MFR being as high as 1500g/10min, simultaneously, the volatile component is less than 0.05 percent, and the ash content is less than 0.02 percent, and the polypropylene melt-blown special material is suitable for being used as a processing raw material of the melt-blown non-woven fabric.

Description

Preparation method of high-MFR polypropylene melt-blown special material
The technical field is as follows:
the invention relates to the technical field of melt-blown non-woven fabric processing, in particular to a preparation method of a high-MFR polypropylene melt-blown special material.
Background art:
the melt-blown non-woven fabric is widely applied to the fields of filter materials, medical and health materials, environmental protection materials, clothing materials, battery diaphragm materials and the like. At this stage, due to the emergence of new coronavirus pneumonia, melt-blown nonwoven fabrics are more and more well known. The melt-blown non-woven fabric has good filtering performance and plays an important role in the mask.
The higher the Melt Flow Rate (MFR) of the material used to produce the meltblown nonwoven fabric, the finer the meltblown fibers and the better the filtration performance of the resulting meltblown nonwoven fabric, and the MFR generally required for materials used to produce meltblown nonwoven fabrics is above 800g/10 min. At present, in order to save cost and simplify the process, polypropylene with low melt index is mostly used as a raw material, and a peroxide controlled degradation method is adopted to produce a melt-blown material with high MFR. Patent CN201610375131.7 discloses an additive for producing meltblown nonwoven fabrics, comprising fatty acid amide and di-t-butyl peroxide, but does not provide MFR value of meltblown produced by the additive, so it is difficult to objectively judge the effect of the additive on MFR value improvement. Patent CN201910197622.0 discloses a melt-blown copolymer and a process for its production, but MFR values in the range of 35 to 140g/10min do not give melt-blown material of high MFR.
The invention content is as follows:
the invention aims to solve the technical problem of providing a preparation method of a high-MFR polypropylene melt-blown special material, which is used for preparing the high-MFR polypropylene melt-blown special material with low volatile and ash content by improving the preparation method of the polypropylene melt-blown material and is suitable for processing high-quality melt-blown non-woven fabrics.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
a preparation method of a high MFR polypropylene melt-blown special material comprises the following preparation steps:
(1) freezing polypropylene at low temperature, crushing, ball milling and sieving to obtain polypropylene powder;
(2) adding polypropylene powder, peroxide and a dispersing agent into a mixer, and mixing at a high speed to obtain a premix;
(3) adding the premix into a double-screw extruder, heating and melting, enabling the melt to flow out of a die head of the extruder, cooling, granulating, and sieving to obtain the special melt-blown material.
The low-temperature freezing temperature is-15 to-10 ℃, and the time is 12 to 24 hours.
The invention obtains the particle size of the polypropylene particles by freezing, crushing and ball milling, thereby being beneficial to the uniform blending of the polypropylene and the peroxide.
The mass ratio of the polypropylene powder, the peroxide and the dispersant is (80-100) to (5-20) to (1-10).
The polypropylene is homo-or co-polypropylene, and the MFR is 0.5-40g/10 min.
The peroxide is 3,6, 9-triethyl-3, 6, 9-trimethyl-1, 4, 7-triperoxonane. The peroxide is used as a degradation agent, has excellent safety performance and degradation efficiency and extremely low odor compared with other existing degradation agents, and is a preferred peroxide for degrading polypropylene.
The good dispersibility of peroxide in polypropylene is a necessary condition for the narrow molecular weight distribution of polypropylene, and conversely, the peroxide and the polypropylene have heterogeneous reaction, which causes severe local degradation and broaden the molecular weight distribution.
The addition of the dispersing agent can prevent the degradation agent from being adsorbed on the surface of the polypropylene powder, thereby improving the dispersibility of the peroxide in the polypropylene and improving the MFR value of the polypropylene; moreover, the addition of the dispersing agent can also enhance the mechanical properties of the polypropylene.
The dispersant is N- [ 4-cyano-3- (trifluoromethyl) phenyl ] methyl epoxy acrylamide. The invention takes N- [ 4-cyano-3- (trifluoromethyl) phenyl ] methyl epoxy acrylamide as a dispersant, and improves the dispersibility of peroxide in polypropylene and enhances the mechanical property of the polypropylene by utilizing the affinity of the dispersant to the polypropylene and the peroxide.
The dispersant is 5- (5-ethyl thiophene-3-yl) -4- (tetrahydrofuran-2-ylmethyl) -4H-1,2, 4-triazole-3-thiol.
The invention also uses 5- (5-ethyl thiophene-3-yl) -4- (tetrahydrofuran-2-ylmethyl) -4H-1,2, 4-triazole-3-thiol as a dispersant, and tests show that the technical effect obtained by the invention is better than that of N- [ 4-cyano-3- (trifluoromethyl) phenyl ] methyl epoxy acrylamide.
The extruder temperature was 200 ℃ and 250 ℃.
The die temperature was 200 ℃ and 250 ℃.
The cooling adopts a water cooling tank.
The invention has the beneficial effects that: the invention takes polypropylene as a base material, cuts molecular chains of low MFR polypropylene by adding peroxide, reduces molecular weight, improves the fluidity of melt, thereby producing the special polypropylene material with MFR as high as 1500g/10min, simultaneously, the volatile content is less than 0.05 percent, the ash content is less than 0.02 percent, and the polypropylene material is suitable for being used as a processing raw material of melt-blown non-woven fabrics.
The specific implementation mode is as follows:
in order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
The polypropylene in the examples and comparative examples was shanghai seiki S2040 PP.
Example 1
(1) Freezing polypropylene at-12 ℃ for 12h, crushing, ball-milling, and sieving with a 300-mesh sieve to obtain polypropylene powder;
(2) adding 100g of polypropylene powder, 8g of 3,6, 9-triethyl-3, 6, 9-trimethyl-1, 4, 7-triperoxonane and 5g of N- [ 4-cyano-3- (trifluoromethyl) phenyl ] methyl epoxy acrylamide into a mixer, and mixing at high speed to obtain a premix;
(3) adding the premix into a double-screw extruder, heating and melting, enabling the melt to flow out of a die head of the extruder, cooling by a water cooling tank at 20 ℃, pelletizing and sieving by a 120-mesh sieve, wherein the temperatures of all sections of the extruder are 210 ℃, 220 ℃, 230 ℃ and 220 ℃, the temperature of the die head is 230 ℃ and the temperature of the die head is 20 ℃, so as to obtain the special material for melt-blown.
Example 2
Example 2 differs from example 1 only in that the amount of 3,6, 9-triethyl-3, 6, 9-trimethyl-1, 4, 7-triperoxonane used was adjusted to 12 g.
(1) Freezing polypropylene at-12 ℃ for 12h, crushing, ball-milling, and sieving with a 300-mesh sieve to obtain polypropylene powder;
(2) adding 100g of polypropylene powder, 12g of 3,6, 9-triethyl-3, 6, 9-trimethyl-1, 4, 7-triperoxonane and 5g N- [ 4-cyano-3- (trifluoromethyl) phenyl ] methyl epoxy acrylamide into a mixer, and mixing at high speed to obtain a premix;
(3) adding the premix into a double-screw extruder, heating and melting, enabling the melt to flow out of a die head of the extruder, cooling by a water cooling tank at 20 ℃, pelletizing and sieving by a 120-mesh sieve, wherein the temperatures of all sections of the extruder are 210 ℃, 220 ℃, 230 ℃ and 220 ℃, the temperature of the die head is 230 ℃ and the temperature of the die head is 20 ℃, so as to obtain the special material for melt-blown.
Example 3
Example 3 differs from example 1 only in that the dispersant is replaced with an equal amount of 5- (5-ethylthiophen-3-yl) -4- (tetrahydrofuran-2-ylmethyl) -4H-1,2, 4-triazole-3-thiol.
(1) Freezing polypropylene at-12 ℃ for 12h, crushing, ball-milling, and sieving with a 300-mesh sieve to obtain polypropylene powder;
(2) adding 100g of polypropylene powder, 8g of 3,6, 9-triethyl-3, 6, 9-trimethyl-1, 4, 7-triperoxonane and 5g of 5- (5-ethylthiophene-3-yl) -4- (tetrahydrofuran-2-ylmethyl) -4H-1,2, 4-triazole-3-thiol into a mixer, and mixing at high speed to obtain a premix;
(3) adding the premix into a double-screw extruder, heating and melting, enabling the melt to flow out of a die head of the extruder, cooling by a water cooling tank at 20 ℃, pelletizing and sieving by a 120-mesh sieve, wherein the temperatures of all sections of the extruder are 210 ℃, 220 ℃, 230 ℃ and 220 ℃, the temperature of the die head is 230 ℃ and the temperature of the die head is 20 ℃, so as to obtain the special material for melt-blown.
Comparative example
The comparative example differs from example 1 only in that the dispersant N- [ 4-cyano-3- (trifluoromethyl) phenyl ] methyl epoxyacrylamide was not added.
(1) Freezing polypropylene at-12 ℃ for 12h, crushing, ball-milling, and sieving with a 300-mesh sieve to obtain polypropylene powder;
(2) adding 100g of polypropylene powder and 8g of 3,6, 9-triethyl-3, 6, 9-trimethyl-1, 4, 7-triperoxonane into a mixer, and mixing at high speed to obtain a premix;
(3) adding the premix into a double-screw extruder, heating and melting, enabling the melt to flow out of a die head of the extruder, cooling by a water cooling tank at 20 ℃, pelletizing and sieving by a 120-mesh sieve, wherein the temperatures of all sections of the extruder are 210 ℃, 220 ℃, 230 ℃ and 220 ℃, the temperature of the die head is 230 ℃ and the temperature of the die head is 20 ℃, so as to obtain the special material for melt-blown.
The melt-blown special materials prepared in the above examples and comparative examples were subjected to the performance test, and the test methods and the test results are shown in table 1.
TABLE 1
Figure BDA0002488664480000041
Figure BDA0002488664480000051
As can be seen from Table 1, the addition of the peroxide of the present invention can significantly increase the melt index of the polypropylene melt-blown special material but reduce the tensile stress at break and the tensile stress at yield, while the addition of the dispersant can simultaneously increase the melt index, the tensile stress at break and the tensile stress at yield of the polypropylene melt-blown special material.
The volatile components and ash contents of the polypropylene melt-blown special material prepared in the above examples 1-3 were measured according to GB/T2914 (110 ℃) and GB/T9345.1 (850 ℃), and the results were: the volatile content is less than 0.05 percent, and the ash content is less than 0.02 percent.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (9)

1. A preparation method of a high MFR polypropylene melt-blown special material is characterized by comprising the following steps: the preparation method comprises the following preparation steps:
(1) freezing polypropylene at low temperature, crushing, ball milling and sieving to obtain polypropylene powder;
(2) adding polypropylene powder, peroxide and a dispersing agent into a mixer, and mixing at a high speed to obtain a premix;
(3) adding the premix into a double-screw extruder, heating and melting, enabling the melt to flow out of a die head of the extruder, cooling, granulating, and sieving to obtain the special melt-blown material.
2. The method for preparing high MFR polypropylene melt-blown special material according to claim 1, wherein: the low-temperature freezing temperature is-15 to-10 ℃, and the time is 12 to 24 hours.
3. The method for preparing high MFR polypropylene melt-blown special material according to claim 1, wherein: the mass ratio of the polypropylene powder, the peroxide and the dispersant is (80-100) to (5-20) to (1-10).
4. The method for preparing high MFR polypropylene melt-blown special material according to claim 1, wherein: the polypropylene is homo-or co-polypropylene, and the MFR is 0.5-40g/10 min.
5. The method for preparing high MFR polypropylene melt-blown special material according to claim 1, wherein: the peroxide is 3,6, 9-triethyl-3, 6, 9-trimethyl-1, 4, 7-triperoxonane.
6. The method for preparing high MFR polypropylene melt-blown special material according to claim 1, wherein: the dispersant is N- [ 4-cyano-3- (trifluoromethyl) phenyl ] methyl epoxy acrylamide.
7. The method for preparing high MFR polypropylene melt-blown special material according to claim 1, wherein: the extruder temperature was 200 ℃ and 250 ℃.
8. The method for preparing high MFR polypropylene melt-blown special material according to claim 1, wherein: the die temperature was 200 ℃ and 250 ℃.
9. The method for preparing high MFR polypropylene melt-blown special material according to claim 1, wherein: the cooling adopts a water cooling tank.
CN202010398770.1A 2020-05-12 2020-05-12 Preparation method of high-MFR polypropylene melt-blown special material Withdrawn CN111702982A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010398770.1A CN111702982A (en) 2020-05-12 2020-05-12 Preparation method of high-MFR polypropylene melt-blown special material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010398770.1A CN111702982A (en) 2020-05-12 2020-05-12 Preparation method of high-MFR polypropylene melt-blown special material

Publications (1)

Publication Number Publication Date
CN111702982A true CN111702982A (en) 2020-09-25

Family

ID=72537308

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010398770.1A Withdrawn CN111702982A (en) 2020-05-12 2020-05-12 Preparation method of high-MFR polypropylene melt-blown special material

Country Status (1)

Country Link
CN (1) CN111702982A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112795097A (en) * 2021-01-05 2021-05-14 中广核俊尔(浙江)新材料有限公司 High-flexibility low-odor polypropylene material, preparation method thereof and application thereof in manufacturing melt-blown fabric

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112795097A (en) * 2021-01-05 2021-05-14 中广核俊尔(浙江)新材料有限公司 High-flexibility low-odor polypropylene material, preparation method thereof and application thereof in manufacturing melt-blown fabric

Similar Documents

Publication Publication Date Title
CN111499979B (en) Melt-blown polypropylene composition and preparation method and application thereof
CN111484678B (en) Electret master batch for melt-blown non-woven fabric for low-resistance mask and preparation method thereof
CN107287682B (en) Graphene-containing stone needle composite fiber and preparation method and application thereof
CN112011126A (en) Multifunctional polypropylene melt-spraying material and preparation method thereof
CN112144132A (en) Modified nano zinc oxide antibacterial agent, antibacterial chemical fiber master batch and preparation method thereof
CN1216308A (en) Composition containing alkyl-substituted polysiloxane and hydrophobic fumed silica
CN105733093A (en) Special high-flowability resin for polypropylene fibers and preparation method thereof
CN113005635A (en) Application of propane-butadiene copolymerized polypropylene in preparing melt-blown fabric and preparation method thereof
CN112760820B (en) Melt-blown polypropylene material with long-acting soft hand feeling and preparation method and application thereof
CN111455559B (en) Short-process melt-blown non-woven fabric processing technology and device and non-woven fabric
CN111702982A (en) Preparation method of high-MFR polypropylene melt-blown special material
CN112876853B (en) Melt-blown material auxiliary agent and application thereof
CN109796630B (en) Preparation method of secondary modified light calcium carbonate for plastic products
CN113684611A (en) Antibacterial and mildewproof melt-blown non-woven fabric
CN114318579B (en) Preparation method of high-heat-insulation smoke-suppression polyphenylene sulfide composite material and composite fiber
CN112662063A (en) PP melt-blown material and preparation method thereof
CN107189223A (en) A kind of special ultra-dispersed Masterbatch of polypropylene melt spraying and preparation method thereof
CN111910287A (en) Preparation method of sodium alginate modified regenerated antibacterial flame-retardant polyester composite fiber
CN111574778B (en) Special material for ultrahigh-flow polybutylene alloy melt-blown non-woven fabric and preparation method and application thereof
CN112694669B (en) Melt-blown material with long-term filtration efficiency and preparation method thereof
CN113683834A (en) Melt-blown hydrophilic master batch and preparation method thereof
CN114685781B (en) Polyamide functional masterbatch carrier resin and polyamide functional masterbatch
CN111534041B (en) Modified POM material and preparation method thereof
CN106987049A (en) A kind of functional agglomerate of reinforced polypropylene tensile strength
CN111472091A (en) Three-dimensional facial mask non-woven fabric and manufacturing method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WW01 Invention patent application withdrawn after publication

Application publication date: 20200925

WW01 Invention patent application withdrawn after publication