CN112521690A - Preparation method of foamed polypropylene composite material - Google Patents
Preparation method of foamed polypropylene composite material Download PDFInfo
- Publication number
- CN112521690A CN112521690A CN202011436167.4A CN202011436167A CN112521690A CN 112521690 A CN112521690 A CN 112521690A CN 202011436167 A CN202011436167 A CN 202011436167A CN 112521690 A CN112521690 A CN 112521690A
- Authority
- CN
- China
- Prior art keywords
- composite material
- steps
- foamed
- polypropylene composite
- following
- 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.)
- Pending
Links
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 78
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 78
- -1 polypropylene Polymers 0.000 title claims abstract description 48
- 239000002131 composite material Substances 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 51
- 238000000034 method Methods 0.000 claims abstract description 38
- 239000008367 deionised water Substances 0.000 claims abstract description 31
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 31
- 238000002156 mixing Methods 0.000 claims abstract description 29
- 238000012545 processing Methods 0.000 claims abstract description 20
- 239000002245 particle Substances 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 16
- 239000000203 mixture Substances 0.000 claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 15
- 238000001125 extrusion Methods 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 11
- 238000005520 cutting process Methods 0.000 claims abstract description 11
- 238000001035 drying Methods 0.000 claims abstract description 11
- 230000008569 process Effects 0.000 claims abstract description 9
- 239000000155 melt Substances 0.000 claims abstract description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 22
- 239000003963 antioxidant agent Substances 0.000 claims description 20
- 230000003078 antioxidant effect Effects 0.000 claims description 20
- 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 claims description 20
- 239000000314 lubricant Substances 0.000 claims description 20
- 239000012745 toughening agent Substances 0.000 claims description 20
- 238000005187 foaming Methods 0.000 claims description 11
- 229920001577 copolymer Polymers 0.000 claims description 4
- 150000001412 amines Chemical class 0.000 claims description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 2
- 229920005629 polypropylene homopolymer Polymers 0.000 claims description 2
- 231100000956 nontoxicity Toxicity 0.000 abstract description 4
- 238000005303 weighing Methods 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 15
- 102220040412 rs587778307 Human genes 0.000 description 10
- 210000004027 cell Anatomy 0.000 description 9
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 8
- 239000008116 calcium stearate Substances 0.000 description 8
- 235000013539 calcium stearate Nutrition 0.000 description 8
- 239000004088 foaming agent Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000011148 porous material Substances 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000053 physical method Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 1
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 1
- 206010059866 Drug resistance Diseases 0.000 description 1
- 239000004594 Masterbatch (MB) Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000001099 ammonium carbonate Substances 0.000 description 1
- 235000012501 ammonium carbonate Nutrition 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 210000003850 cellular structure Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/08—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing carbon dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0095—Mixtures of at least two compounding ingredients belonging to different one-dot groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/02—CO2-releasing, e.g. NaHCO3 and citric acid
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/14—Copolymers of propene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/08—Copolymers of ethene
-
- 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
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/02—Organic and inorganic ingredients
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
-
- 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
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
- C08K5/098—Metal salts of carboxylic 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
- C08K5/04—Oxygen-containing compounds
- C08K5/13—Phenols; Phenolates
- C08K5/134—Phenols containing ester groups
- C08K5/1345—Carboxylic esters of phenolcarboxylic acids
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a preparation method of a foamed polypropylene composite material, which comprises the following steps: (1) adding deionized water with the weight ratio of 0.2-1.0% into the polypropylene material, and mixing and evenly mixing the polypropylene material and the deionized water according to the weight ratio; (2) adding the mixture obtained in the step (1) into a double-screw extruder for melt blending and extrusion, wherein the processing temperature of the extruder is set to be 190 ℃ and 220 ℃, the vacuum degree is controlled to be-0.03-0 MPa, and the melt pressure is controlled to be 3.5-5.5MPa in the processing process; (3) and (3) carrying out water cooling, drying and grain cutting on the extruded sample strip in the step (2) to obtain the foamed particles. The invention has the advantages of convenient and fast preparation of raw materials, no toxicity, no pollution and the like.
Description
Technical Field
The invention relates to a preparation method of a foamed polypropylene composite material.
Background
Polypropylene (PP) is a general thermoplastic with excellent comprehensive performance, has the characteristics of low price, corrosion resistance, easy recovery, light weight, no toxicity and the like, and products thereof also have the advantages of good thermal stability, excellent shock resistance and energy absorption performance, better drug resistance and oil resistance and the like. At present, the consumption of PP in five general-purpose plastics is fastest, and the PP is widely applied and favored by various industries such as automobiles, household appliances, building materials and the like.
The advantages of PP for foamed materials are also quite evident. Foamed PP is usually produced by physical or chemical means to form a cellular structure inside the PP, so that the density of the product is often reduced to a low level, thereby reducing the weight greatly. Meanwhile, the foamed PP has the characteristics of heat insulation, buffering, light weight and the like of the foamed material and the characteristics of corrosion resistance, low price and the like of the PP material. In addition, the foamed PP is easy to recycle and decompose.
The foaming mode of PP can be divided into two types, chemical method and physical method. The chemical method is mainly to add a chemical foaming agent, and then the foaming agent is subjected to chemical reaction in the polymer by a certain mode such as heating and the like so as to generate gas and finally form bubbles. Chinese patent No. CN 105566751 a discloses a method for preparing a high-crystallinity polypropylene foaming master batch, which is synthesized by compounding chemical foaming agents such as ammonium carbonate and azodiisobutyronitrile. The physical method is mainly to add a physical foaming agent, and change the physical state of the foaming agent by changing the external environment, so as to generate gas and finally form bubbles. Chinese patent No. CN 110216826 a discloses a method for preparing foamed polypropylene for piezoelectric materials, which synthesizes foamed polypropylene by adding supercritical fluid carbon dioxide.
However, the materials disclosed in the above patents all have the problems of complicated manufacturing process and high cost, and the added chemical foaming agent may cause certain harm to human body, which also limits the application range. Therefore, the invention provides a preparation scheme of the foaming polypropylene, which has high operability, easily obtained raw materials, no toxicity and low price.
Disclosure of Invention
The invention mainly aims to provide a preparation method of a foamed polypropylene composite material.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a preparation method of a foaming polypropylene composite material is characterized by comprising the following steps: the method comprises the following steps:
(1) the raw materials of the foamed polypropylene composite material contain 0.2-1.0 wt% of deionized water, and the raw materials are mixed uniformly according to the weight ratio;
(2) adding the mixture obtained in the step (1) into a double-screw extruder for melt blending and extrusion, wherein the processing temperature of the extruder is set to be 190 ℃ and 220 ℃, the vacuum degree is controlled to be-0.03-0 MPa, and the melt pressure is controlled to be 3.5-5.5MPa in the processing process;
(3) and (3) carrying out water cooling, drying and grain cutting on the extruded sample strip in the step (2) to obtain the foamed particles.
In one embodiment, the polypropylene material comprises 57.4-94.2% of polypropylene, 0-25% of talcum powder, 5-15% of toughening agent, 0.2-0.6% of antioxidant, 0.2-0.6% of lubricant and 0.2-0.4% of weather resisting agent.
In one embodiment, the polypropylene is a homo-polypropylene, a co-polypropylene or a mixture thereof having a melt index of less than 4g/10 min.
In one embodiment, the talc powder is a 2000 mesh or larger talc powder.
In one embodiment, the toughening agent is one of ethylene octene copolymer, ethylene butene copolymer or a mixture thereof.
In one embodiment, the antioxidant is one or a combination of 1010, 168, G814, PS 802.
In one embodiment, the lubricant is one of a PE wax, a stearate, or a combination thereof.
In one embodiment, the weathering agent is a hindered amine based weathering agent.
The invention achieves the foaming effect by adding deionized water with a certain proportion (0.2-1.0 percent) and controlling the vacuum degree in the production process by adding production process regulation. If the content of the deionized water is less than 0.2%, the foaming effect is not good, and if it is more than 1.0%, the water content is too high, which affects the extrusion granulation. The deionized water is added to ensure that the material system contains a certain proportion of liquid water, and in the process of extruding and granulating the material, the temperature of 190-220 ℃ exceeds the boiling point of water, so that the liquid water is vaporized into a gas state. Meanwhile, because the selected PP base material has a low melt index and a high melt strength after melting, and the control of a production process (the vacuum degree is-0.03-0 MPa, and the melt pressure is controlled to be 3.5-5.5MPa) is added, the vacuum degree is always kept at a certain level in the production process, and under the synergistic action, gas is bound in the polymer melt, so that the porous foamed polypropylene material is obtained.
The foaming agent used in the invention is deionized water, and compared with the conventional physical and chemical foaming agent, the deionized water has the advantages of convenient and quick raw material preparation, no toxicity, no pollution and the like, and compared with the special foaming-grade HMSPP, the scheme has wider range of PP selected by the base material and is cheaper.
Drawings
FIG. 1 is a pictorial representation of an article prepared in accordance with the method of example 1.
FIG. 2 is a pictorial representation of an article prepared in accordance with the method of example 2.
FIG. 3 is a pictorial representation of an article made by the method of example 3.
FIG. 4 is a pictorial representation of an article made according to the method of comparative example 1.
FIG. 5 is a pictorial representation of an article made according to the method of comparative example 2.
FIG. 6 is a pictorial representation of an article made according to the method of comparative example 3.
FIG. 7 is a pictorial representation of an article made according to the method of comparative example 4.
FIG. 8 is a pictorial representation of an article made according to the method of comparative example 5.
FIG. 9 is an extruded article made from pellets made according to example 2.
Detailed Description
Example 1
A foamed polypropylene composite material comprises the following raw materials: polypropylene (PP is preferably the petrochemical metallocene name T30S and the Mekkaido EP300H, in this example, T30S and EP300H 1:1 are mixed, in the following examples 2, 3 and comparative examples 1-5, T30S and EP300H 1:1 are mixed), 94.2%, talc (PT-560), 5%, a toughening agent (8605), an antioxidant (RGANOX 1010, G814 are both mixed at 1:1, the same as in the following examples 2, 3 and comparative examples 1-5) 0.2%, a lubricant (calcium stearate/EBS-SF 1:1 is mixed, the same as in the following examples 2, 3 and comparative examples 1-5) 0.2%, a weather resistance agent (5590) 0.2%, and deionized water 0.2%.
(1) Weighing the required PP and deionized water according to the weight ratio, mixing uniformly, adding talcum powder, a toughening agent, an antioxidant, a lubricant and a weather-resistant agent according to the weight ratio, and blending for 2min at 40HZ in a high-speed mixer;
(2) adding the mixture obtained in the step (1) into a double-screw extruder through a weighing machine and a feeding machine for melt blending and extrusion, wherein the processing temperature of the extruder is 190-;
(3) and (3) carrying out water cooling, drying and grain cutting on the extruded sample strip in the step (2) to obtain the foamed particles. The product is shown in figure 1.
Example 2
A foamed polypropylene composite material comprises the following raw materials: 73.4 percent of polypropylene (PP T30S/EP300H), 15 percent of talcum powder (PT-560), 10 percent of toughener (8605), 0.4 percent of antioxidant (RGANOX 1010 and G814), 0.4 percent of lubricant (calcium stearate/EBS-SF), 0.2 percent of weather resisting agent (5590) and 0.6 percent of deionized water.
(1) Weighing the required PP and deionized water according to the weight ratio, mixing uniformly, adding talcum powder, a toughening agent, an antioxidant, a lubricant and a weather-resistant agent according to the weight ratio, and blending for 2min at 40HZ in a high-speed mixer;
(2) adding the mixture obtained in the step (1) into a double-screw extruder through a weighing machine and a feeding machine for melt blending and extrusion, wherein the processing temperature of the extruder is 190-;
(3) and (3) carrying out water cooling, drying and grain cutting on the extruded sample strip in the step (2) to obtain the foamed particles. The product prepared is shown in figure 2.
Example 3
A foamed polypropylene composite material comprises the following raw materials: 57.4 percent of polypropylene (PP T30S/EP300H), 25 percent of talcum powder (PT-560), 15 percent of toughener (8605), 0.6 percent of antioxidant (RGANOX 1010 and G814), 0.6 percent of lubricant (calcium stearate/EBS-SF), 0.4 percent of weather resisting agent (5590) and 1.0 percent of deionized water.
(1) Weighing the required PP and deionized water according to the weight ratio, mixing uniformly, adding talcum powder, a toughening agent, an antioxidant, a lubricant and a weather-resistant agent according to the weight ratio, and blending for 2min at 40HZ in a high-speed mixer;
(2) adding the mixture obtained in the step (1) into a double-screw extruder through a weighing machine and a feeding machine for melt blending and extrusion, wherein the processing temperature of the extruder is set at 190-;
(3) and (3) carrying out water cooling, drying and grain cutting on the extruded sample strip in the step (2) to obtain the foamed particles. The product prepared is shown in figure 3.
Comparative example 1
A foamed polypropylene composite material comprises the following raw materials: 94.4 percent of polypropylene (PP T30S/EP300H), 0 percent of talcum powder (PT-560), 5 percent of toughener (8605), 0.2 percent of antioxidant (RGANOX 1010, G814), 0.2 percent of lubricant (calcium stearate/EBS-SF), 0.2 percent of weather resisting agent (5590) and 0 percent of deionized water.
(1) Weighing the required PP and deionized water according to the weight ratio, mixing uniformly, adding talcum powder, a toughening agent, an antioxidant, a lubricant and a weather-resistant agent according to the weight ratio, and blending for 2min at 40HZ in a high-speed mixer;
(2) adding the mixture obtained in the step (1) into a double-screw extruder through a weighing machine and a feeding machine for melt blending and extrusion, wherein the processing temperature of the extruder is 190 ℃ and 220 ℃, and the vacuum degree is controlled to be-0.06 MPa in the processing process;
(3) and (3) carrying out water cooling, drying and grain cutting on the extruded sample strip in the step (2) to obtain the foamed particles. The product prepared is shown in figure 4.
Comparative example 2
A foamed polypropylene composite material comprises the following raw materials: 74 percent of polypropylene (PP T30S/EP300H), 15 percent of talcum powder (PT-560), 10 percent of toughening agent (8605), 0.4 percent of antioxidant (RGANOX 1010 and G814), 0.4 percent of lubricant (calcium stearate/EBS-SF), 0.2 percent of weather resisting agent (5590) and 0 percent of deionized water.
(1) Weighing the required PP and deionized water according to the weight ratio, mixing uniformly, adding talcum powder, a toughening agent, an antioxidant, a lubricant and a weather-resistant agent according to the weight ratio, and blending for 2min at 40HZ in a high-speed mixer;
(2) adding the mixture obtained in the step (1) into a double-screw extruder through a weighing machine and a feeding machine for melt blending and extrusion, wherein the processing temperature of the extruder is 190 ℃ and 220 ℃, and the vacuum degree is controlled to be-0.06 MPa in the processing process;
(3) and (3) carrying out water cooling, drying and grain cutting on the extruded sample strip in the step (2) to obtain the foamed particles. The product is shown in FIG. 5.
Comparative example 3
A foamed polypropylene composite material comprises the following raw materials: 58.4 percent of polypropylene (PP T30S/EP300H), 25 percent of talcum powder (PT-560), 15 percent of toughener (8605), 0.6 percent of antioxidant (RGANOX 1010 and G814), 0.6 percent of lubricant (calcium stearate/EBS-SF), 0.4 percent of weather resisting agent (5590) and 0 percent of deionized water.
(1) Weighing the required PP and deionized water according to the weight ratio, mixing uniformly, adding talcum powder, a toughening agent, an antioxidant, a lubricant and a weather-resistant agent according to the weight ratio, and blending for 2min at 40HZ in a high-speed mixer;
(2) adding the mixture obtained in the step (1) into a double-screw extruder through a weighing machine and a feeding machine for melt blending and extrusion, wherein the processing temperature of the extruder is 190 ℃ and 220 ℃, and the vacuum degree is controlled to be-0.06 MPa in the processing process;
(3) and (3) carrying out water cooling, drying and grain cutting on the extruded sample strip in the step (2) to obtain the foamed particles. The product prepared is shown in figure 6.
Comparative example 4
A foamed polypropylene composite material comprises the following raw materials: 77.5 percent of polypropylene (PP T30S/EP300H), 15 percent of talcum powder (PT-560), 5 percent of toughener (8605), 0.4 percent of antioxidant (RGANOX 1010 and G814), 0.4 percent of lubricant (calcium stearate/EBS-SF), 0.2 percent of weather resisting agent (5590) and 1.5 percent of deionized water.
(1) Weighing the required PP and deionized water according to the weight ratio, mixing uniformly, adding talcum powder, a toughening agent, an antioxidant, a lubricant and a weather-resistant agent according to the weight ratio, and blending for 2min at 40HZ in a high-speed mixer;
(2) adding the mixture obtained in the step (1) into a double-screw extruder through a weighing machine and a feeding machine for melt blending and extrusion, wherein the processing temperature of the extruder is 190 ℃ and 220 ℃, and the vacuum degree is controlled to be-0.06 MPa in the processing process;
(3) and (3) carrying out water cooling, drying and grain cutting on the extruded sample strip in the step (2) to obtain the foamed particles. The product prepared is shown in figure 7.
Comparative example 5
A foamed polypropylene composite material comprises the following raw materials: 94.2 percent of polypropylene (PP T30S/EP300H), 0 percent of talcum powder (PT-560), 5 percent of toughener (8605), 0.2 percent of antioxidant (RGANOX 1010, G814), 0.2 percent of lubricant (calcium stearate/EBS-SF), 0.2 percent of weather resisting agent (5590) and 0.2 percent of deionized water.
(1) Weighing the required PP and deionized water according to the weight ratio, mixing uniformly, adding talcum powder, a toughening agent, an antioxidant, a lubricant and a weather-resistant agent according to the weight ratio, and blending for 2min at 40HZ in a high-speed mixer;
(2) adding the mixture obtained in the step (1) into a double-screw extruder through a weighing machine and a feeding machine for melt blending and extrusion, wherein the processing temperature of the extruder is set at 190 ℃ and 220 ℃, and the vacuum degree is controlled at 0MPa in the processing process;
(3) and (3) carrying out water cooling, drying and grain cutting on the extruded sample strip in the step (2) to obtain the foamed particles. The product is shown in FIG. 8.
TABLE 1
TABLE 2
The density test method comprises the following steps: reference test standard GB/T1033B method;
volume expansion ratio:
wherein:
is the volume expansion ratio; rho0(ii) an unfoamed material density; rhofIs the foamed material density.
Picture characterization: photographing the extruded particle slices to obtain corresponding photos;
average cell diameter: randomly taking a plurality of particles in each experiment, photographing a section, performing mapping analysis by using Image-J software, counting the diameter of the cells and calculating an average value;
cell density:
wherein: n is the cell density; n is the number of the counted foam holes; a is the area occupied by the cells.
As can be seen from fig. 1 to 3, the particles produced by the three examples have different degrees of foaming, the bubbles of example 1 are relatively few, the bubbles of example 2 are small and dense, the bubbles of example 3 are relatively large, and the number of the bubbles is not as dense as that of example 2 but is more than that of example 1, and as can be seen from table 2, the cells of example 2 have higher density and smaller average cell diameter. As can be seen from FIGS. 4 to 6, the particles obtained in the first three comparative examples were not foamed. Therefore, under the condition that a certain amount of deionized water is added, purposeful control is carried out on the vacuum degree of the production process, and the required expanded polypropylene particles can be obtained. Meanwhile, the number and the pore diameter of the pores can be influenced by the vacuum degree and the using amount of the deionized water, and in a certain range, along with the reduction of the absolute value of the vacuum degree, the using amount of the deionized water is increased, the diameter of the pores is increased firstly and then reduced, and the number of the pores is increased firstly and then reduced.
This is presumably due to the fact that the addition of deionized water, which evaporates to steam at the processing temperature, also better confines the gas within the melt due to the higher strength of the selected polypropylene melt. When the absolute value of the degree of vacuum is large, this binding force is not sufficient to bind water vapor, and therefore foaming cannot be formed, as can be seen from the results of comparative example 4 (fig. 7); when the absolute value of the vacuum degree is gradually reduced, a small part of water vapor is brought out by the vacuum, so that the foaming quantity is less (figure 1); when the absolute value of the degree of vacuum is small to a certain value, water vapor is difficult to carry out due to high melt strength, resulting in an increase in the amount of foaming (fig. 2); when the absolute value of the vacuum degree is reduced to a certain value and the amount of the deionized water is increased to a certain degree, the gap between the water vapor is reduced until the water vapor is connected into a piece, so that the diameter of the cells is increased and the number of the cells is reduced, as can be seen from fig. 3 and 8, and meanwhile, the volume expansion rate is gradually increased along with the increase of the amount of the deionized water.
After the particles of example 2 were obtained, they were extruded through a single screw, and since no vacuum was added during the extrusion through the single screw, the original gas was not discharged, and the resulting extruded article had a certain amount of pores, as can be seen from fig. 9.
The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, which is defined by the appended claims and their equivalents.
Claims (8)
1. A preparation method of a foaming polypropylene composite material is characterized by comprising the following steps: the method comprises the following steps:
(1) the raw materials of the foamed polypropylene composite material contain 0.2-1.0 wt% of deionized water, and the raw materials are mixed uniformly according to the weight ratio;
(2) adding the mixture obtained in the step (1) into a double-screw extruder for melt blending and extrusion, wherein the processing temperature of the extruder is set to be 190 ℃ and 220 ℃, the vacuum degree is controlled to be-0.03-0 MPa, and the melt pressure is controlled to be 3.5-5.5MPa in the processing process;
(3) and (3) carrying out water cooling, drying and grain cutting on the extruded sample strip in the step (2) to obtain the foamed particles.
2. The method for preparing a foamed polypropylene composite material according to claim 1, wherein the method comprises the following steps: the polypropylene material comprises 57.4-94.2% of polypropylene, 0-25% of talcum powder, 5-15% of toughening agent, 0.2-0.6% of antioxidant, 0.2-0.6% of lubricant and 0.2-0.4% of weather-resistant agent.
3. The method for preparing a foamed polypropylene composite material according to claim 2, wherein the method comprises the following steps: the polypropylene is homo-polypropylene, co-polypropylene or a mixture thereof with a melt index of less than 4g/10 min.
4. The method for preparing a foamed polypropylene composite material according to claim 2, wherein the method comprises the following steps: the talcum powder is of above 2000 meshes.
5. The method for preparing a foamed polypropylene composite material according to claim 2, wherein the method comprises the following steps: the toughening agent is one or a mixture of ethylene octene copolymer and ethylene butene copolymer.
6. The method for preparing a foamed polypropylene composite material according to claim 2, wherein the method comprises the following steps: the antioxidant is one or the combination of 1010, 168, G814 and PS 802.
7. The method for preparing a foamed polypropylene composite material according to claim 2, wherein the method comprises the following steps: the lubricant is one or the combination of PE wax and stearate.
8. The method for preparing a foamed polypropylene composite material according to claim 2, wherein the method comprises the following steps: the weather resisting agent is hindered amine weather resisting agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011436167.4A CN112521690A (en) | 2020-12-07 | 2020-12-07 | Preparation method of foamed polypropylene composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011436167.4A CN112521690A (en) | 2020-12-07 | 2020-12-07 | Preparation method of foamed polypropylene composite material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112521690A true CN112521690A (en) | 2021-03-19 |
Family
ID=74999927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011436167.4A Pending CN112521690A (en) | 2020-12-07 | 2020-12-07 | Preparation method of foamed polypropylene composite material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112521690A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114316443A (en) * | 2021-12-23 | 2022-04-12 | 青岛国恩科技股份有限公司 | Modified polypropylene and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5220500B1 (en) * | 1969-05-06 | 1977-06-03 | ||
| US5070111A (en) * | 1991-03-13 | 1991-12-03 | Advanced Elastomer Systems, L.P. | Foaming thermoplastic elastomers |
| JP2001200086A (en) * | 2000-01-21 | 2001-07-24 | Mitsubishi Heavy Ind Ltd | Method for manufacturing polyolefin based resin foam |
| CN101492547A (en) * | 2009-03-05 | 2009-07-29 | 中国科学院长春应用化学研究所 | Method for preparing polypropylene foam with water as foaming agent |
| CN101519503A (en) * | 2009-04-03 | 2009-09-02 | 武汉华丽生物材料有限公司 | Biomass material foamed plastic taking water as foaming agent and preparation method thereof |
| CN105694206A (en) * | 2016-01-28 | 2016-06-22 | 江苏科技大学 | Method for producing long-glass-fiber-reinforced polypropylene foaming injection product by using water as foaming agent |
-
2020
- 2020-12-07 CN CN202011436167.4A patent/CN112521690A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5220500B1 (en) * | 1969-05-06 | 1977-06-03 | ||
| US5070111A (en) * | 1991-03-13 | 1991-12-03 | Advanced Elastomer Systems, L.P. | Foaming thermoplastic elastomers |
| JP2001200086A (en) * | 2000-01-21 | 2001-07-24 | Mitsubishi Heavy Ind Ltd | Method for manufacturing polyolefin based resin foam |
| CN101492547A (en) * | 2009-03-05 | 2009-07-29 | 中国科学院长春应用化学研究所 | Method for preparing polypropylene foam with water as foaming agent |
| CN101519503A (en) * | 2009-04-03 | 2009-09-02 | 武汉华丽生物材料有限公司 | Biomass material foamed plastic taking water as foaming agent and preparation method thereof |
| CN105694206A (en) * | 2016-01-28 | 2016-06-22 | 江苏科技大学 | Method for producing long-glass-fiber-reinforced polypropylene foaming injection product by using water as foaming agent |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114316443A (en) * | 2021-12-23 | 2022-04-12 | 青岛国恩科技股份有限公司 | Modified polypropylene and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1523051B (en) | Composition for polyolefin resin foam and foam thereof, and method for producing foam | |
| EP2164893B1 (en) | Polyethylene foam | |
| CN107286475B (en) | Polypropylene foam material and preparation method thereof | |
| CN111138755A (en) | Low-density low-dielectric polypropylene composite material and preparation method thereof | |
| EP0359517A2 (en) | Production of low density polypropylene foam | |
| CN110982171B (en) | Low-density toughened polypropylene open-cell micro-foaming material | |
| CN112940468B (en) | Polylactic acid-based foamed particles and preparation method thereof | |
| CN101722689B (en) | Micro-foamed composite board and manufacturing method thereof | |
| CN105385024A (en) | Bimodal distribution type polypropylene foaming material and preparing method thereof | |
| US4407768A (en) | Foamable polymeric composition comprising propylene polymer and hydrated alumina | |
| CN1907684A (en) | Method of preparing polystyrene extrusion molding cystosepiment by polystyrene recovery material | |
| CN112521690A (en) | Preparation method of foamed polypropylene composite material | |
| JPS58111834A (en) | Preparation of extruded polystyrene sheet foam | |
| CN111171366B (en) | Low-density polypropylene bead foam and preparation method and application thereof | |
| CN114085455A (en) | Low-density flame-retardant polypropylene foam material and preparation method thereof | |
| CN112795080B (en) | EVA/LDPE supercritical solid foaming material and preparation method thereof | |
| EP1521799A1 (en) | Open-cell polypropylene particle foams | |
| CN110698746A (en) | Polyethylene foam and preparation method thereof | |
| CN101203552A (en) | Constructional heat-insulating foam board and process for production thereof | |
| CN107383636B (en) | Low-thermal-conductivity-coefficient foamed particles and preparation method thereof | |
| CN102311575A (en) | PP foaming composite additive | |
| CN1273279C (en) | A process for producing physically foamed polyolefin foams and insulation foams prepared therewith | |
| CN109280240B (en) | Preparation method of chemical crosslinking foaming polyethylene material and screw | |
| CN87106832A (en) | The production method of cellular PVC-plastic | |
| CN108003426B (en) | Composition for foamed polyethylene, polyethylene foamed product and preparation 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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210319 |