CN114833988A - Preparation process of impact-resistant modified plastic particles - Google Patents
Preparation process of impact-resistant modified plastic particles Download PDFInfo
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- CN114833988A CN114833988A CN202210547549.7A CN202210547549A CN114833988A CN 114833988 A CN114833988 A CN 114833988A CN 202210547549 A CN202210547549 A CN 202210547549A CN 114833988 A CN114833988 A CN 114833988A
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- impact
- polystyrene
- modifier
- epdm
- filler
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
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- 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
- B29B13/06—Conditioning or physical treatment of the material to be shaped by drying
- B29B13/065—Conditioning or physical treatment of the material to be shaped by drying of powder or pellets
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- 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
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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
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
- C08L25/06—Polystyrene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C2045/0096—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor drying the moulding material before injection, e.g. by heating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2025/00—Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material
- B29K2025/04—Polymers of styrene
- B29K2025/06—PS, i.e. polystyrene
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
Abstract
The invention provides a preparation process of impact-resistant modified plastic particles. The preparation process of the impact-resistant modified plastic particles comprises the following steps: the first step is as follows: preparing equipment and raw materials: raw materials: polystyrene, modifier EPDM, light CaCO as filler 3 And a coupling agent; the device comprises: high-speed mixer, double-screw extruder and plastic injection molding machine(ii) a The second step is as follows: the preparation process comprises the following steps: s1, polystyrene, a modifier EPDM, and a filler light CaCO 3 And weighing the coupling agent and the coupling agent in proportion, and fully mixing in a high-speed mixer for 15-20 min, S2, and discharging the mixed material obtained in the step S1. The preparation process of the impact-resistant modified plastic particles provided by the invention is simple to operate, and has the advantages of good flexibility, high impact strength, low price and the like, so that the performance requirements can be met.
Description
Technical Field
The invention belongs to the technical field of preparation processes of modified plastic particles, and particularly relates to a preparation process of impact-resistant modified plastic particles.
Background
With the quality of life of people becoming better and better, automobiles become an indispensable transportation tool in daily life, the automobiles comprise a plurality of parts, the parts are partially made of modified plastic polystyrene, the modified plastic polystyrene is generally formed by injection molding through an injection molding machine, at present, a toughening mode of blending elastomer and rubber is widely applied, the toughness and the impact strength of a PS matrix material can be obviously improved by adding rubber particles, the main mode of plastic modification at present is provided, but the cost of organic elastomer and rubber is still higher, researches show that if the particle size of inorganic particles is smaller, the inorganic particles can be well dispersed in a polymer material, the rigidity of the material is enhanced, and the strength and the toughness are reduced.
Therefore, there is a need to provide a new process for preparing impact-resistant modified plastic particles to solve the above-mentioned problems.
Disclosure of Invention
The invention solves the technical problem of providing the preparation process of the impact-resistant modified plastic particles, which has the advantages of simple operation, good flexibility, high impact strength, low price and the like, and can meet the performance requirements.
In order to solve the technical problems, the preparation process of the impact-resistant modified plastic particles provided by the invention comprises the following steps:
the first step is as follows: preparing equipment and raw materials:
raw materials: polystyrene, modifier EPDM, light CaCO as filler 3 And a coupling agent;
the device comprises: a high-speed mixer, a double-screw extruder and a plastic injection molding machine;
the second step is as follows: the preparation process comprises the following steps:
s1, mixing polystyrene and a modifierEPDM, Filler light CaCO 3 Weighing the coupling agent and the coupling agent in proportion, and then fully mixing in a high-speed mixer for 15-20 min;
s2, discharging the mixed material obtained in the step S1, and then drying the mixed material in a vacuum drying oven for 2 hours;
s3, after the drying in the step S2, placing the material into a double-screw extruder, and then extruding and granulating the material through the double-screw extruder, wherein the extrusion temperature of the double-screw extruder is 185-195 ℃, and the screw rotating speed in the double-screw extruder is 200 r/min;
s4, placing the mixed material extruded in the step S3 into a vacuum drying oven again, and drying to remove moisture;
s5, placing the dried material obtained in the step S4 into a plastic injection molding machine for injection molding, and performing injection molding on the material to obtain the impact-resistant material polystyrene.
As a further scheme of the invention, the model of the double-screw extruder is SHJ-36, and the model of the plastic injection molding machine is SZ-100/80.
As a further scheme of the invention, the proportion of the modifier EPDM to the polystyrene is 4:6, and the filler is light CaCO 3 The proportion of the modifier is 20 percent, and the modifier EPDM is ethylene propylene diene monomer rubber powder.
As a further scheme of the invention, the modifier EPDM plays a role in toughening and modifying the polystyrene material, so that the mechanical property and the flow property of the material can be greatly improved.
As a further aspect of the invention, the filler is a light CaCO 3 The calcium carbonate is calcium carbonate, the mesh number of the calcium carbonate is 325 meshes, and therefore, the production cost of the product can be greatly reduced by adding 325 meshes of calcium carbonate as a filler for blending and filling.
As a further aspect of the invention, the coupling agent may be a light CaCO for the filler 3 Has good interface compatibility with polystyrene, thereby leading the filling material to be light CaCO 3 And (4) uniformly dispersing.
Compared with the related technology, the preparation process of the impact-resistant modified plastic particles provided by the invention has the following beneficial effects:
1. the invention has the advantages of simple operation, good flexibility, large impact strength, low price and the like, and can meet the performance requirements.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
Fig. 1 is a schematic block diagram of the present invention.
Detailed Description
Embodiment 1, with reference to fig. 1, wherein fig. 1 is a schematic block diagram of the present invention. The preparation process of the impact-resistant modified plastic particles comprises the following steps:
the first step is as follows: preparing equipment and raw materials:
raw materials: polystyrene, modifier EPDM, light CaCO as filler 3 And a coupling agent;
the device comprises: a high-speed mixer, a double-screw extruder and a plastic injection molding machine;
the second step is as follows: the preparation process comprises the following steps:
s1, polystyrene, a modifier EPDM, and a filler light CaCO 3 And the coupling agent is weighed in proportion and then fully mixed in a high-speed mixer, wherein the mixing time is 15-20 min.
S2, discharging the mixed material obtained in the step S1, and then drying the mixed material in a vacuum drying oven for 2 hours;
s3, after the drying in the step S2, placing the material into a double-screw extruder, and then extruding and granulating the material through the double-screw extruder, wherein the extrusion temperature of the double-screw extruder is 185-195 ℃, and the screw rotating speed in the double-screw extruder is 200 r/min;
s4, placing the mixed material extruded in the step S3 into a vacuum drying oven again, and drying to remove moisture;
s5, placing the dried material obtained in the step S4 into a plastic injection molding machine for injection molding, and performing injection molding on the material to obtain the impact-resistant material polystyrene.
The model of the double-screw extruder is SHJ-36, and the model of the plastic injection molding machine is SZ-100/80.
The proportion of the modifier EPDM to the polystyrene is 4:6, and the filler is light CaCO 3 The proportion of the modifier is 20 percent, and the modifier EPDM is ethylene propylene diene monomer rubber powder.
The modifier EPDM plays a role in toughening and modifying the polystyrene material, so that the mechanical property and the flow property of the material can be greatly improved.
The filler is light CaCO 3 The calcium carbonate is calcium carbonate, the mesh number of the calcium carbonate is 325 meshes, and therefore, the production cost of the product can be greatly reduced by adding 325 meshes of calcium carbonate as a filler for blending and filling.
The coupling agent can make the filling material light CaCO 3 Has good interface compatibility with polystyrene, thereby leading the filling material to be light CaCO 3 And (4) uniformly dispersing.
Through analysis, when the mass ratio of EPDM to polystyrene is 4:6, 20 percent of light CaCO is added 3 The tensile strength of the modified polystyrene plastic reaches 18.1MPa (>17.0MPa) and the impact strength reaches 187.2J/m (>92.0J/m), and the melt index reaches 2.6g/10 min: (>2.5g/10 min), so that the material has the advantages of good flexibility, high impact strength, low price and the like, and can meet the performance requirements.
Example 2:
a preparation process of impact-resistant modified plastic particles comprises the following steps:
s1, polystyrene, a modifier EPDM, and a filler light CaCO 3 Mixing the materials with a coupling agent for 15-20 min, discharging, and placing the materials in a vacuum drying oven for drying for 2 h;
s2, after drying, placing the material into a double-screw extruder to extrude and granulate the material, wherein the extrusion temperature is 185-195 ℃, the rotation speed is 200r/min, and then placing the extruded mixed material into a vacuum drying oven again to dry and remove moisture;
and S3, placing the dried material into a plastic injection molding machine for injection molding, and performing injection molding on the material to obtain the impact-resistant material polystyrene.
The mass fraction of the modifier EPDM can be increased to cause the tensile strength of the EPDM and PS blended material to gradually decrease, when the mass fraction of the EPDM is less than 30%, the tensile strength of the EPDM and PS blended material is rapidly decreased, but the tensile strength gradually decreases along with the continuous increase of the mass fraction of the EPDM, because the original PS matrix is a continuous phase, the EPDM added in the blended material is equivalent to a dispersed phase, the continuity of the original matrix material is damaged, the tensile strength of the EPDM is not high, the original resin material provides main tensile stress, therefore, the more the EPDM is added, the less the mass fraction of the PS is, the lower the tensile strength of the blended material is, and the mass ratio of the EPDM to the polystyrene is best 4: 6.
Claims (6)
1. A preparation process of impact-resistant modified plastic particles is characterized by comprising the following steps:
the first step is as follows: preparing equipment and raw materials:
raw materials: polystyrene, modifier EPDM, light CaCO as filler 3 And a coupling agent;
the device comprises: a high-speed mixer, a double-screw extruder and a plastic injection molding machine;
the second step is as follows: the preparation process comprises the following steps:
s1, polystyrene, modifier EPDM, filler light CaCO 3 Weighing the coupling agent and the coupling agent in proportion, and then fully mixing in a high-speed mixer for 15-20 min;
s2, discharging the mixed material obtained in the step S1, and then drying the mixed material in a vacuum drying oven for 2 hours;
s3, after the drying in the step S2 is finished, placing the material into a double-screw extruder, and then extruding and granulating the material through the double-screw extruder, wherein the extrusion temperature of the double-screw extruder is 185-195 ℃, and the screw rotating speed in the double-screw extruder is 200 r/min;
s4, placing the mixed material extruded in the step S3 into a vacuum drying oven again, and drying to remove moisture;
s5, placing the dried material obtained in the step S4 into a plastic injection molding machine for injection molding, and performing injection molding on the material to obtain the impact-resistant material polystyrene.
2. The process for preparing impact-resistant modified plastic particles according to claim 1, wherein: the model of the double-screw extruder is SHJ-36, and the model of the plastic injection molding machine is SZ-100/80.
3. The process for preparing impact-resistant modified plastic particles according to claim 1, wherein: the proportion of the modifier EPDM to the polystyrene is 4:6, and the filler is light CaCO 3 The proportion of the modifier is 20 percent, and the modifier EPDM is ethylene propylene diene monomer rubber powder.
4. The process for preparing impact-resistant modified plastic particles according to claim 1, wherein: the modifier EPDM plays a role in toughening and modifying the polystyrene material, so that the mechanical property and the flow property of the material can be greatly improved.
5. The process for preparing impact-resistant modified plastic particles according to claim 1, wherein: the filler is light CaCO 3 The calcium carbonate is calcium carbonate, the mesh number of the calcium carbonate is 325 meshes, and therefore blending filling is carried out by adding the calcium carbonate with 325 meshes as a filler, so that the production cost of the product can be greatly reduced.
6. The process for preparing impact-resistant modified plastic particles according to claim 1, wherein: the coupling agent can make the filler light CaCO 3 Has good interface compatibility with polystyrene, thereby leading the filling material to be light CaCO 3 And (4) uniformly dispersing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210547549.7A CN114833988A (en) | 2022-05-18 | 2022-05-18 | Preparation process of impact-resistant modified plastic particles |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210547549.7A CN114833988A (en) | 2022-05-18 | 2022-05-18 | Preparation process of impact-resistant modified plastic particles |
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| Publication Number | Publication Date |
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| CN114833988A true CN114833988A (en) | 2022-08-02 |
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| CN202210547549.7A Pending CN114833988A (en) | 2022-05-18 | 2022-05-18 | Preparation process of impact-resistant modified plastic particles |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080004381A1 (en) * | 2004-08-13 | 2008-01-03 | Peter Putsch | Polmer Blend of Non-Compatible Polymers |
| CN101250306A (en) * | 2008-03-27 | 2008-08-27 | 东华大学 | High-toughness thermoplastic elastomer/polystyrene composite material and preparation method thereof |
| CN106977870A (en) * | 2017-06-01 | 2017-07-25 | 泉州盈创新材料技术开发有限公司 | A kind of high-ductility high wear-resistant polystyrene plastics and preparation method thereof |
| CN107474412A (en) * | 2017-08-15 | 2017-12-15 | 常州大学 | A kind of PS/EPDM intermingling materials with internal core shell structure and preparation method thereof |
| WO2018119864A1 (en) * | 2016-12-29 | 2018-07-05 | 李志华 | Polystyrene-based composite material and preparation method therefor |
| CN108250649A (en) * | 2016-12-28 | 2018-07-06 | 上海邦中新材料有限公司 | A kind of poly styrene composite material available for 3D printing and preparation method thereof |
| CN110776701A (en) * | 2019-11-18 | 2020-02-11 | 福建师范大学 | Modified polystyrene plastic for plastic bead ornaments and preparation method thereof |
-
2022
- 2022-05-18 CN CN202210547549.7A patent/CN114833988A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080004381A1 (en) * | 2004-08-13 | 2008-01-03 | Peter Putsch | Polmer Blend of Non-Compatible Polymers |
| CN101250306A (en) * | 2008-03-27 | 2008-08-27 | 东华大学 | High-toughness thermoplastic elastomer/polystyrene composite material and preparation method thereof |
| CN108250649A (en) * | 2016-12-28 | 2018-07-06 | 上海邦中新材料有限公司 | A kind of poly styrene composite material available for 3D printing and preparation method thereof |
| WO2018119864A1 (en) * | 2016-12-29 | 2018-07-05 | 李志华 | Polystyrene-based composite material and preparation method therefor |
| CN106977870A (en) * | 2017-06-01 | 2017-07-25 | 泉州盈创新材料技术开发有限公司 | A kind of high-ductility high wear-resistant polystyrene plastics and preparation method thereof |
| CN107474412A (en) * | 2017-08-15 | 2017-12-15 | 常州大学 | A kind of PS/EPDM intermingling materials with internal core shell structure and preparation method thereof |
| CN110776701A (en) * | 2019-11-18 | 2020-02-11 | 福建师范大学 | Modified polystyrene plastic for plastic bead ornaments and preparation method thereof |
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