CN117362824A - Shrinkage deformation-resistant thermal injection molding material and preparation method thereof - Google Patents
Shrinkage deformation-resistant thermal injection molding material and preparation method thereof Download PDFInfo
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 70
- 239000012778 molding material Substances 0.000 title claims abstract description 52
- 238000002360 preparation method Methods 0.000 title claims abstract description 33
- 239000004743 Polypropylene Substances 0.000 claims abstract description 61
- 239000000203 mixture Substances 0.000 claims abstract description 58
- -1 polypropylene Polymers 0.000 claims abstract description 55
- 229920001155 polypropylene Polymers 0.000 claims abstract description 54
- 239000000463 material Substances 0.000 claims abstract description 35
- 239000011246 composite particle Substances 0.000 claims abstract description 28
- 239000003607 modifier Substances 0.000 claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 21
- 239000000725 suspension Substances 0.000 claims abstract description 19
- 239000000835 fiber Substances 0.000 claims abstract description 18
- 229920000642 polymer Polymers 0.000 claims abstract description 17
- 244000025254 Cannabis sativa Species 0.000 claims abstract description 14
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 14
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 14
- 239000006096 absorbing agent Substances 0.000 claims abstract description 8
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000758 substrate Substances 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims description 22
- 239000002245 particle Substances 0.000 claims description 18
- 238000003756 stirring Methods 0.000 claims description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- 238000005469 granulation Methods 0.000 claims description 10
- 230000003179 granulation Effects 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000006185 dispersion Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 6
- 230000002745 absorbent Effects 0.000 claims description 6
- 239000002250 absorbent Substances 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 239000002270 dispersing agent Substances 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 6
- 229920003063 hydroxymethyl cellulose Polymers 0.000 claims description 6
- 229940031574 hydroxymethyl cellulose Drugs 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 239000003960 organic solvent Substances 0.000 claims description 4
- 235000012239 silicon dioxide Nutrition 0.000 claims description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000000084 colloidal system Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 239000003995 emulsifying agent Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 238000000265 homogenisation Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims description 3
- 235000019341 magnesium sulphate Nutrition 0.000 claims description 3
- 239000012047 saturated solution Substances 0.000 claims description 3
- 150000002500 ions Chemical class 0.000 claims description 2
- 229920001912 maleic anhydride grafted polyethylene Polymers 0.000 claims description 2
- 229920001911 maleic anhydride grafted polypropylene Polymers 0.000 claims description 2
- 238000009757 thermoplastic moulding Methods 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 239000002086 nanomaterial Substances 0.000 abstract description 3
- 239000000047 product Substances 0.000 description 25
- 239000002585 base Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 230000007547 defect Effects 0.000 description 3
- 241001326934 Triarrhena Species 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 241000196127 Osmunda Species 0.000 description 1
- 241000294180 Osmunda japonica Species 0.000 description 1
- 244000236458 Panicum colonum Species 0.000 description 1
- 235000015225 Panicum colonum Nutrition 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000012644 addition polymerization Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010382 chemical cross-linking Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005543 nano-size silicon particle Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- 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
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to the technical field of materials, and discloses a shrinkage deformation resistant thermal injection molding material which comprises the following preparation raw materials in parts by weight: 0.1 to 0.4 part of UV absorber, 1 to 3 parts of antioxidant, 2 to 8 parts of auxiliary mixture, 30 to 40 parts of 1100N polypropylene, 15 to 20 parts of EPS30R polypropylene, 10 to 20 parts of 7227 polypropylene, 15 to 20 parts of 2303 polymer fluidity modifier, 2 to 6 parts of composite particles and 1 to 2 parts of silicate; the composite particles are prepared by the following steps: and I, adding the dispersed phase substrate into triethanolamine to prepare a suspension with the weight percentage concentration of 1-55%. By adding composite particles made of nano materials on the basis of four main materials, the injection molding product has good deformation resistance, and meanwhile, auxiliary mixture made of various grass fiber mixtures is supplemented, so that the rigidity and strength of the product are improved, and the corrosion resistance and weather resistance of the material are improved correspondingly.
Description
Technical Field
The invention relates to the technical field of materials, in particular to a shrinkage deformation resistant thermal injection molding material and a preparation method thereof.
Background
At present, a plurality of injection molding materials can realize one-time injection molding of products, chemical crosslinking is not needed, the purity of the products is high, the process is simple, the energy consumption is low, the processing efficiency is high, polypropylene (PP for short) is included, and the polypropylene is a polymer formed by the addition polymerization of propylene, and belongs to thermoplastic synthetic resin with excellent performance, and the thermoplastic synthetic resin is colorless, odorless, nontoxic and is a semitransparent solid substance.
The density of the polypropylene is 0.89-0.91 g/cm 3 Inflammable, melting point 165 deg.c, softening at 155 deg.c, use temperature range of-30-140 deg.c, acid, alkali, salt solution and other organic solvents corrosion resistance below 80 deg.c, high temperature and oxidation decomposition, high chemical resistance, heat resistance, high electric insulating performance, high strength mechanical performance, high wear resistance, etc.
The polypropylene has a very wide application range, is a main raw material for producing daily plastic products, but has certain defects such as poor cold resistance and low-temperature impact strength of products, and meanwhile, the products are easy to age under the actions of photo-heat and oxygen in use, have poor colorability and are easy to burn and deform.
Therefore, in order to improve part of the defects of the traditional polypropylene material products, the invention aims to take various composite raw materials as the preparation base of injection molding materials by a mixed preparation method so as to improve the rigidity and toughness of hot injection molding products and the stiffness of the materials and prevent the problems of shrinkage deformation of the products.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a shrinkage deformation resistant thermal injection molding material and a preparation method thereof, which solve the problems of poor cold resistance, low-temperature impact strength, easy aging under the actions of light, heat and oxygen and easy deformation and combustion of the traditional polypropylene material product.
In order to achieve the above purpose, the invention is realized by the following technical scheme: a shrinkage deformation resistant thermal injection molding material comprises the following preparation raw materials in parts by weight: 0.1 to 0.4 part of UV absorber, 1 to 3 parts of antioxidant, 2 to 8 parts of auxiliary mixture, 30 to 40 parts of 1100N polypropylene, 15 to 20 parts of EPS30R polypropylene, 10 to 20 parts of 7227 polypropylene, 15 to 20 parts of 2303 polymer fluidity modifier, 2 to 6 parts of composite particles and 1 to 2 parts of silicate;
the composite particles are prepared by the following steps:
i, adding a disperse phase substrate into triethanolamine to prepare a suspension with the weight percentage concentration of 1-55% of the material;
II, adding a dispersing agent into the prepared suspension to perform pre-dispersion treatment, so as to obtain a dispersed phase prepared suspension;
III, placing the pre-dispersion suspension obtained in the step II into a homogenizer for homogenization treatment, and then collecting the dispersed dispersion phase suspension;
IV, adding PP particles into the dispersed phase suspension obtained in the step III to prepare a mass ratio of the weight of the PP particles to the mass of the organic solvent of 1:2.2, stirring and heating the mixture, distilling triethanolamine in the mixture to obtain a molten base material, and transferring the molten base material into a granulator for granulation to obtain a composite particle finished product.
Preferably, in the step i, the substrate is nano silica and nano calcium carbonate according to the following formula 1:2 are mixed according to the proportion to prepare the preparation in the step II.
Preferably, the addition mass of the dispersant is 1 to 5% of the total mass of the base material.
Preferably, the auxiliary mixture is prepared by the following method steps:
adding water, an emulsifying agent, superfine silicon dioxide, a grass fiber mixture and a surface modifier in a mixing reaction kettle according to the weight portion ratio, heating and stirring for 40-55 minutes, and cooling after stirring is completed to obtain a mixture A;
step two, adding hydroxymethyl cellulose into the mixture A, and stirring to obtain a mixture B;
and thirdly, adding the mixture B obtained in the step two into a magnesium sulfate saturated solution for heating, stirring for 20-35 minutes, and filtering to obtain a colloid auxiliary mixture finished product.
Preferably, in the first step, the grass fiber mixture is the osmunda japonica fiber, the triarrhena yedoensis fiber and the aquatic weed fiber according to the following ratio of 1:2.5: 1.2.
Preferably, in the first step, the surface modifier is one or two of maleic anhydride grafted polyethylene and maleic anhydride grafted polypropylene.
Preferably, in the first step, the added water is deionized water from which impurities in the form of ions are removed.
Preferably, in the second step, the added mass of the hydroxymethyl cellulose is 1.28% of the total mass ratio of the mixture A.
A preparation method of a shrinkage deformation resistant thermal injection molding material comprises the following preparation steps:
s1: adding a UV absorbent, an antioxidant, an auxiliary mixture, 1100N polypropylene, EPS30R polypropylene, 7227 polypropylene, 2303 polymer fluid modifier, composite particles and silicate into a mixer for mixing treatment, and discharging after uniform mixing;
s2: adding the uniformly mixed materials into an extruder for extrusion granulation to obtain basic particles;
s3: adding the basic particles into an injection molding machine, and performing thermal injection molding to obtain the injection molding material.
Preferably, in the step S1, the mixing time of the mixer is controlled to be 2 to 3 hours.
The invention provides a shrinkage deformation resistant thermal injection molding material and a preparation method thereof. The beneficial effects are as follows:
1. according to the invention, the 1100N polypropylene and the EPS30R polypropylene are used as the preparation raw materials of the molding material, so that the hardness of the injection molding material can be remarkably increased, the product breakage property is reduced, and the 7227 polypropylene and the 2303 polymer fluidity modifier are added, so that the fluidity of the prepared material is increased, the thermal injection molding is facilitated, the stiffness of the material is increased, the shrinkage deformation is prevented, and the dimensional stability of the product is increased.
2. According to the invention, on the basis of four main materials, the composite particles made of nano materials are added in an auxiliary manner, so that the toughness of an injection molding product is obviously improved, the injection molding product has good deformation resistance, meanwhile, the auxiliary mixture made of a plurality of grass fiber mixtures is supplemented, the rigidity and the strength of the product can be improved, and the corrosion resistance and the weather resistance of the material are correspondingly improved.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1:
the embodiment of the invention provides a shrinkage deformation resistant thermal injection molding material, which comprises the following preparation raw materials in parts by weight: 0.4 part of UV absorber, 1 part of antioxidant, 8 parts of auxiliary mixture, 40 parts of 1100N polypropylene, 20 parts of EPS30R polypropylene, 20 parts of 7227 polypropylene, 20 parts of 2303 polymer fluidity modifier, 6 parts of composite particles and 2 parts of silicate;
among the above raw materials, the composite particles are prepared by the following steps:
i, adding a disperse phase substrate into triethanolamine to prepare a suspension with a material weight percentage concentration of 45%, wherein in the step, the substrate is nano silicon dioxide and nano calcium carbonate according to the following weight percentage concentration of 1:2, mixing and preparing the materials in proportion;
II, adding a dispersing agent into the prepared suspension for pre-dispersing treatment, wherein the adding mass of the dispersing agent is 2% of the total mass of the base material in the step, and then obtaining a dispersed phase prepared suspension;
III, placing the pre-dispersion suspension obtained in the step II into a homogenizer for homogenization treatment, and then collecting the dispersed dispersion phase suspension;
IV, adding PP particles into the dispersed phase suspension obtained in the step III to prepare a mass ratio of the weight of the PP particles to the mass of the organic solvent of 1:2.2, stirring and heating the mixture, distilling triethanolamine in the mixture to obtain a molten base material, and transferring the molten base material into a granulator for granulation to obtain a composite particle finished product.
Further, among the above raw materials, the auxiliary mixture is prepared by the following method steps:
adding water which is deionized water from which ionic impurities are removed, an emulsifying agent, superfine silicon dioxide, a grass fiber mixture and a surface modifying agent into a mixing reaction kettle according to the weight part ratio, wherein the grass fiber mixture is prepared from the osmunda grass fiber, the triarrhena grass fiber and the water grass fiber according to the weight part ratio of 1:2.5:1.2, the surface modifier is prepared by grafting polyethylene with maleic anhydride, heating and stirring for 40 minutes, and obtaining a mixture A after stirring and cooling are completed;
step two, adding hydroxymethyl cellulose into the mixture A, wherein in the step, the added hydroxymethyl cellulose accounts for 1.28% of the total mass of the mixture A, and stirring to obtain a mixture B;
and thirdly, adding the mixture B obtained in the step two into a magnesium sulfate saturated solution for heating, stirring for 20-35 minutes, and filtering to obtain a colloid auxiliary mixture finished product.
Further, the embodiment also provides a preparation method of the shrinkage deformation resistant thermal injection molding material, which comprises the following preparation steps:
s1: adding a UV absorbent, an antioxidant, an auxiliary mixture, 1100N polypropylene, EPS30R polypropylene, 7227 polypropylene, 2303 polymer fluid modifier, composite particles and silicate into a mixer for mixing treatment, controlling the mixing time of the mixer to be 2 hours, and discharging after uniform mixing;
s2: adding the uniformly mixed materials into an extruder for extrusion granulation to obtain basic particles;
s3: adding the basic particles into an injection molding machine, and performing thermal injection molding to obtain the injection molding material.
The thermal injection molding material prepared by the invention has specific experimental performance parameters shown in table 2.
In the embodiment of the invention, the 1100N polypropylene and the EPS30R polypropylene are used as the preparation raw materials of the molding material, so that the hardness of the injection molding material can be obviously increased, the product breakage property is reduced, and the 7227 polypropylene and the 2303 polymer fluidity modifier are also added, so that the fluidity of the prepared material is increased, the thermal injection molding is facilitated, the stiffness of the material is increased, the shrinkage deformation is prevented, and the dimensional stability of the product is increased.
Example 2:
the embodiment of the invention provides a shrinkage deformation resistant thermal injection molding material, which comprises the following preparation raw materials in parts by weight: 0.4 part of UV absorber, 1 part of antioxidant, 6 parts of auxiliary mixture, 37 parts of 1100N polypropylene, 18 parts of EPS30R polypropylene, 18 parts of 7227 polypropylene, 18 parts of 2303 polymer fluidity modifier, 5 parts of composite particles and 1 part of silicate;
the preparation methods of the composite particles and the auxiliary mixture in the above raw materials are all kept unchanged, and the difference between this example and example 1 is that the addition parts of the raw materials are different.
Further, the embodiment also provides a preparation method of the shrinkage deformation resistant thermal injection molding material, which comprises the following preparation steps:
s1: adding a UV absorbent, an antioxidant, an auxiliary mixture, 1100N polypropylene, EPS30R polypropylene, 7227 polypropylene, 2303 polymer fluid modifier, composite particles and silicate into a mixer for mixing treatment, controlling the mixing time of the mixer to be 2 hours, and discharging after uniform mixing;
s2: adding the uniformly mixed materials into an extruder for extrusion granulation to obtain basic particles;
s3: adding the basic particles into an injection molding machine, and performing thermal injection molding to obtain the injection molding material.
The thermal injection molding material prepared by the invention has specific experimental performance parameters shown in table 2.
In the embodiment, by adding the composite particles made of the nano materials on the basis of four main materials in an auxiliary manner, the toughness of an injection molding product can be obviously improved, the injection molding product has good deformation resistance, meanwhile, the invention also supplements auxiliary mixtures made of various grass fiber mixtures, the rigidity and the strength of the product can be improved, and the corrosion resistance and the weather resistance of the material are correspondingly improved.
Example 3:
the embodiment of the invention provides a shrinkage deformation resistant thermal injection molding material, which comprises the following preparation raw materials in parts by weight: 0.4 part of UV absorber, 1 part of antioxidant, 4 parts of auxiliary mixture, 35 parts of 1100N polypropylene, 15 parts of EPS30R polypropylene, 15 parts of 7227 polypropylene, 17 parts of 2303 polymer fluidity modifier, 4 parts of composite particles and 1 part of silicate;
the preparation methods of the composite particles and the auxiliary mixture in the above raw materials are all kept unchanged, and the difference between this example and example 1 is that the addition parts of the raw materials are different.
Further, the embodiment also provides a preparation method of the shrinkage deformation resistant thermal injection molding material, which comprises the following preparation steps:
s1: adding a UV absorbent, an antioxidant, an auxiliary mixture, 1100N polypropylene, EPS30R polypropylene, 7227 polypropylene, 2303 polymer fluid modifier, composite particles and silicate into a mixer for mixing treatment, controlling the mixing time of the mixer to be 2 hours, and discharging after uniform mixing;
s2: adding the uniformly mixed materials into an extruder for extrusion granulation to obtain basic particles;
s3: adding the basic particles into an injection molding machine, and performing thermal injection molding to obtain the injection molding material.
The thermal injection molding material prepared by the invention has specific experimental performance parameters shown in table 2.
Example 4:
the embodiment of the invention provides a shrinkage deformation resistant thermal injection molding material, which comprises the following preparation raw materials in parts by weight: 0.4 part of UV absorber, 1 part of antioxidant, 2 parts of auxiliary mixture, 30 parts of 1100N polypropylene, 15 parts of EPS30R polypropylene, 10 parts of 7227 polypropylene, 15 parts of 2303 polymer fluidity modifier, 3 parts of composite particles and 1 part of silicate;
the preparation methods of the composite particles and the auxiliary mixture in the above raw materials are all kept unchanged, and the difference between this example and example 1 is that the addition parts of the raw materials are different.
Further, the embodiment also provides a preparation method of the shrinkage deformation resistant thermal injection molding material, which comprises the following preparation steps:
s1: adding a UV absorbent, an antioxidant, an auxiliary mixture, 1100N polypropylene, EPS30R polypropylene, 7227 polypropylene, 2303 polymer fluid modifier, composite particles and silicate into a mixer for mixing treatment, controlling the mixing time of the mixer to be 2 hours, and discharging after uniform mixing;
s2: adding the uniformly mixed materials into an extruder for extrusion granulation to obtain basic particles;
s3: adding the basic particles into an injection molding machine, and performing thermal injection molding to obtain the injection molding material.
The thermal injection molding material prepared by the invention has specific experimental performance parameters shown in table 2.
Comparative example 1:
the embodiment of the invention provides a thermal injection molding material, which comprises the following preparation raw materials in parts by weight: 0.4 part of UV absorber, 1 part of antioxidant, 30 parts of 1100N polypropylene, 15 parts of EPS30R polypropylene, 15 parts of 7227 polypropylene, 15 parts of 2303 polymer fluidity modifier and 1 part of silicate.
The preparation method of the thermal injection molding material comprises the following steps: the raw materials are prepared according to the weight portion, then are mixed in a mixer, and are put in a granulator for granulation after being mixed uniformly, thus obtaining the thermal injection molding granular material.
Table 1: examples 1-4 auxiliary mix and composite particle addition parameter settings table inside the thermal injection molding material;
| sequence number | Example 1 | Example 2 | Example 3 | Example 4 |
| Auxiliary mixture | 8 parts of | 6 parts of | 4 parts of | 2 parts of |
| Composite particles | 6 parts of | 5 parts of | 4 parts of | 3 parts of |
The test methods for detecting the properties of the finished products of the thermal injection molding materials prepared in examples 1 to 4 and comparative example 1 according to the present invention are as follows:
the thermal injection molding materials prepared in examples 1 to 4 and comparative example were prepared into a block-shaped test piece having a length of 20cm, a width of 8cm and a thickness of 8cm, and the penetration depth, tensile strength and the like of the needle-shaped object were measured by applying a pressure of 3N using an elongated needle-shaped object, and the test results thereof are shown in Table 2.
Table 2: application property data measurement tables for the thermoplastic molding materials prepared in examples 1 to 4 and comparative example 1;
by combining examples 1-4 and comparative examples and combining Table 2, it can be seen that the thermal injection molding materials in the present application have certain advantages in terms of hardness and toughness over the injection molding materials provided in comparative examples, and the thermal injection molding materials provided in the present invention can be used to produce plastic products that can meet the requirements of high quality production and have good physical properties.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The shrinkage deformation resistant thermal injection molding material is characterized by comprising the following preparation raw materials in parts by weight: 0.1 to 0.4 part of UV absorber, 1 to 3 parts of antioxidant, 2 to 8 parts of auxiliary mixture, 30 to 40 parts of 1100N polypropylene, 15 to 20 parts of EPS30R polypropylene, 10 to 20 parts of 7227 polypropylene, 15 to 20 parts of 2303 polymer fluidity modifier, 2 to 6 parts of composite particles and 1 to 2 parts of silicate;
the composite particles are prepared by the following steps:
i, adding a disperse phase substrate into triethanolamine to prepare a suspension with the weight percentage concentration of 1-55% of the material;
II, adding a dispersing agent into the prepared suspension to perform pre-dispersion treatment, so as to obtain a dispersed phase prepared suspension;
III, placing the pre-dispersion suspension obtained in the step II into a homogenizer for homogenization treatment, and then collecting the dispersed dispersion phase suspension;
IV, adding PP particles into the dispersed phase suspension obtained in the step III to prepare a mass ratio of the weight of the PP particles to the mass of the organic solvent of 1:2.2, stirring and heating the mixture, distilling triethanolamine in the mixture to obtain a molten base material, and transferring the molten base material into a granulator for granulation to obtain a composite particle finished product.
2. The shrinkage deformation resistant thermo-injection molding material according to claim 1, wherein in the step i, the base material is nano silica and nano calcium carbonate according to 1:2 are mixed according to the proportion.
3. The shrinkage deformation resistant thermal injection molding material according to claim 1, wherein in the step II, the addition mass of the dispersing agent is 1-5% of the total mass of the base material.
4. The shrink-resistant thermoplastic molding material as claimed in claim 1, wherein said auxiliary mixture is prepared by the following method steps:
adding water, an emulsifying agent, superfine silicon dioxide, a grass fiber mixture and a surface modifier in a mixing reaction kettle according to the weight portion ratio, heating and stirring for 40-55 minutes, and cooling after stirring is completed to obtain a mixture A;
step two, adding hydroxymethyl cellulose into the mixture A, and stirring to obtain a mixture B;
and thirdly, adding the mixture B obtained in the step two into a magnesium sulfate saturated solution for heating, stirring for 20-35 minutes, and filtering to obtain a colloid auxiliary mixture finished product.
5. The shrinkage deformation resistant thermo-injection molding material as claimed in claim 4, wherein in the first step, the grass fiber mixture is a mixture of a grass fiber, a grass fiber and a grass fiber according to 1:2.5: 1.2.
6. The shrink-resistant thermo-injection molding material according to claim 4, wherein in the first step, the surface modifier is one or both of maleic anhydride grafted polyethylene and maleic anhydride grafted polypropylene.
7. The shrinkage deformation resistant thermo-injection molding material as claimed in claim 4, wherein in the first step, the added water is deionized water from which the impurities in the form of ions are removed.
8. The shrinkage deformation resistant thermal injection molding material according to claim 4, wherein in the second step, the added mass of the hydroxymethyl cellulose is 1.28% of the total mass of the mixture A.
9. A method for preparing a shrinkage deformation resistant thermal injection molding material, which is applied to the shrinkage deformation resistant thermal injection molding material according to any one of claims 1 to 8, and comprises the following preparation steps:
s1: adding a UV absorbent, an antioxidant, an auxiliary mixture, 1100N polypropylene, EPS30R polypropylene, 7227 polypropylene, 2303 polymer fluid modifier, composite particles and silicate into a mixer for mixing treatment, and discharging after uniform mixing;
s2: adding the uniformly mixed materials into an extruder for extrusion granulation to obtain basic particles;
s3: adding the basic particles into an injection molding machine, and performing thermal injection molding to obtain the injection molding material.
10. The method for preparing a shrinkage deformation resistant thermo-injection molding material according to claim 9, wherein in the step S1, the mixing time of the mixer is controlled to be 2-3 hours.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311322378.9A CN117362824A (en) | 2023-10-13 | 2023-10-13 | Shrinkage deformation-resistant thermal injection molding material and preparation method thereof |
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| CN202311322378.9A CN117362824A (en) | 2023-10-13 | 2023-10-13 | Shrinkage deformation-resistant thermal injection molding material and preparation method thereof |
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