CN112143139A - High-fluidity high-toughness PVC valve injection molding aggregate and preparation method thereof - Google Patents
High-fluidity high-toughness PVC valve injection molding aggregate and preparation method thereof Download PDFInfo
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- CN112143139A CN112143139A CN202011071097.7A CN202011071097A CN112143139A CN 112143139 A CN112143139 A CN 112143139A CN 202011071097 A CN202011071097 A CN 202011071097A CN 112143139 A CN112143139 A CN 112143139A
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title abstract description 13
- 239000008187 granular material Substances 0.000 claims abstract description 44
- 239000000463 material Substances 0.000 claims abstract description 40
- 238000002156 mixing Methods 0.000 claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 239000011347 resin Substances 0.000 claims description 33
- 229920005989 resin Polymers 0.000 claims description 33
- 239000006057 Non-nutritive feed additive Substances 0.000 claims description 21
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical group [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 20
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical group O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 18
- 239000008188 pellet Substances 0.000 claims description 17
- 239000004709 Chlorinated polyethylene Substances 0.000 claims description 11
- IRERQBUNZFJFGC-UHFFFAOYSA-L azure blue Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[S-]S[S-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] IRERQBUNZFJFGC-UHFFFAOYSA-L 0.000 claims description 10
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 10
- 239000006229 carbon black Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 10
- 239000000945 filler Substances 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- 239000004611 light stabiliser Substances 0.000 claims description 10
- 239000004408 titanium dioxide Substances 0.000 claims description 10
- 239000004698 Polyethylene Substances 0.000 claims description 9
- 239000000314 lubricant Substances 0.000 claims description 9
- 239000012745 toughening agent Substances 0.000 claims description 9
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 8
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 8
- 239000008116 calcium stearate Substances 0.000 claims description 8
- 235000013539 calcium stearate Nutrition 0.000 claims description 8
- 150000002148 esters Chemical class 0.000 claims description 8
- 239000012760 heat stabilizer Substances 0.000 claims description 8
- 238000005469 granulation Methods 0.000 claims description 6
- 230000003179 granulation Effects 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 235000021355 Stearic acid Nutrition 0.000 claims description 4
- IHBCFWWEZXPPLG-UHFFFAOYSA-N [Ca].[Zn] Chemical compound [Ca].[Zn] IHBCFWWEZXPPLG-UHFFFAOYSA-N 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 4
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 4
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 4
- 239000003381 stabilizer Substances 0.000 claims description 4
- 239000008117 stearic acid Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 235000013799 ultramarine blue Nutrition 0.000 claims 3
- 230000007547 defect Effects 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 229920006351 engineering plastic Polymers 0.000 abstract description 3
- 229940095686 granule product Drugs 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- YAHBZWSDRFSFOO-UHFFFAOYSA-L dimethyltin(2+);2-(2-ethylhexoxy)-2-oxoethanethiolate Chemical compound CCCCC(CC)COC(=O)CS[Sn](C)(C)SCC(=O)OCC(CC)CCCC YAHBZWSDRFSFOO-UHFFFAOYSA-L 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 238000007599 discharging Methods 0.000 description 4
- 238000009775 high-speed stirring Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000005457 optimization Methods 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 235000013873 oxidized polyethylene wax Nutrition 0.000 description 2
- 239000004209 oxidized polyethylene wax Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002596 lactones Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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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
- C08L27/00—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 a halogen; Compositions of derivatives of such polymers
- C08L27/02—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 a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—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 a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
-
- 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
-
- 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
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- 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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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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
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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
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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
- C08L2205/06—Polymer mixtures characterised by other features having improved processability or containing aids for moulding methods
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to the technical field of PVC valve materials and preparation methods thereof, in particular to high-fluidity high-toughness PVC valve injection molding granules and a preparation method thereof. The high-fluidity high-toughness PVC valve injection molding granule prepared by the formula has the advantages of good granule color degree, higher fluidity, high toughness, heat resistance, corrosion resistance and the like, overcomes the defects of the existing PVC valve injection molding granule product, has a simple preparation method, can be used for injection molding production of engineering plastic valve parts, and can meet the fluidity and toughness requirements of PVC valve granules by blending and modifying PVC to improve the toughness and rigidity of PVC, thereby solving the disadvantage of diversity of the raw materials of the existing valve parts and reducing the product cost.
Description
Technical Field
The invention relates to the technical field of PVC valve materials and preparation methods thereof, in particular to high-fluidity high-toughness PVC valve injection molding granules and a preparation method thereof.
Background
The PVC granules used by the existing PVC plastic valve have poor flowability and poor product toughness, the valve body and the inner core of the valve require high strength and high toughness, and the existing PVC valve material has short service life and is not suitable for the field of large-scale engineering.
In addition, different parts and components adopt PVC plastic valves produced by different materials, for example, the used valve body is made of PVC material, and the valve core and the valve handle are made of PE material or ABS material, so that the PVC plastic valve has higher cost.
Disclosure of Invention
The invention provides high-fluidity high-toughness PVC valve injection molding granules and a preparation method thereof, overcomes the defects of the prior art, and can effectively solve the problems of poor toughness of the existing PVC plastic valve and high cost of valves produced by different materials.
One of the technical schemes of the invention is realized by the following measures: the high-fluidity high-toughness PVC valve injection molding granule comprises, by weight, 90-100 parts of general PVC resin, 0-10 parts of a toughening agent, 2-4 parts of an acrylate type or/and composite ester processing aid, 1.5-4.0 parts of a heat stabilizer, 1.5-3.0 parts of a lubricant, 3-7 parts of a filler, 0.1-0.3 part of a light stabilizer and 0.30-0.42 part of a toner.
The following is a further optimization or/and improvement of one of the above-mentioned technical solutions of the invention:
the general-purpose PVC resin is SG8 type resin.
The heat stabilizer is one of methyl tin mercaptide and liquid calcium zinc stabilizer.
The lubricant is more than one of stearic acid, calcium stearate, PE wax and OPE wax.
The toughening agent is MBS resin or resin type chlorinated polyethylene.
The filler is calcium carbonate.
The light stabilizer is titanium dioxide.
The toner is a mixture of carbon black and ultramarine in a weight ratio of 15: 17.
The high-fluidity high-toughness PVC valve injection molding granules are obtained by the following method: step one, uniformly mixing required amount of raw materials to obtain a mixture, heating the mixture to 105-120 ℃ while stirring to obtain a high-temperature material, and cooling the high-temperature material to 30-45 ℃ to obtain a granulation material; and secondly, extruding and granulating the granulated material by using an extruder to obtain high-fluidity high-toughness PVC valve injection molding granules, wherein the temperature of a charging barrel of the extruder is 150-165 ℃, and the temperature of a machine head of the extruder is 166-175 ℃.
The second technical scheme of the invention is realized by the following measures: a preparation method of the high-fluidity high-toughness PVC valve injection molding granules in the technical scheme comprises the following steps: step one, uniformly mixing required amount of raw materials to obtain a mixture, heating the mixture to 105-120 ℃ while stirring to obtain a high-temperature material, and cooling the high-temperature material to 30-45 ℃ to obtain a granulation material; and secondly, extruding and granulating the granulated material by using an extruder to obtain high-fluidity high-toughness PVC valve injection molding granules, wherein the temperature of a charging barrel of the extruder is 150-165 ℃, and the temperature of a machine head of the extruder is 166-175 ℃.
The following is further optimization or/and improvement of the second technical scheme of the invention:
the general-purpose PVC resin is SG8 type resin.
The heat stabilizer is one of methyl tin mercaptide and liquid calcium zinc stabilizer.
The lubricant is one or more selected from stearic acid, calcium stearate, PE wax and OPE wax (oxidized polyethylene wax).
The toughening agent is MBS resin or resin type Chlorinated Polyethylene (CPE).
The filler is calcium carbonate.
The light stabilizer is titanium dioxide.
The toner is a mixture of carbon black and ultramarine in a weight ratio of 15: 17.
The high-fluidity high-toughness PVC valve injection molding granule prepared by the formula has the advantages of good granule color degree, higher fluidity, high toughness, heat resistance, corrosion resistance and the like, overcomes the defects of the existing PVC valve injection molding granule product, has a simple preparation method, can be used for injection molding production of engineering plastic valve parts, and can meet the fluidity and toughness requirements of PVC valve granules by blending and modifying PVC to improve the toughness and rigidity of PVC, thereby solving the disadvantage of diversity of the raw materials of the existing valve parts and reducing the product cost.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention. The various chemical reagents and chemicals mentioned in the present invention are all well known and commonly used in the art, unless otherwise specified.
The invention is further described below with reference to the following examples:
example 1: the high-fluidity high-toughness PVC valve injection molding granule comprises the following raw materials, by weight, 90-100 parts of general PVC resin, 0-10 parts of toughening agent, 2-4 parts of acrylate type or/and composite ester processing aid, 1.5-4.0 parts of heat stabilizer, 1.5-3.0 parts of lubricant, 3-7 parts of filler, 0.1-0.3 part of light stabilizer and 0.30-0.42 part of toner;
the preparation method comprises the following steps: step one, uniformly mixing required amount of raw materials to obtain a mixture, heating the mixture to 105-120 ℃ while stirring to obtain a high-temperature material, and cooling the high-temperature material to 30-45 ℃ to obtain a granulation material; and secondly, extruding and granulating the granulated material by using an extruder to obtain high-fluidity high-toughness PVC valve injection molding granules, wherein the temperature of a charging barrel of the extruder is 150-165 ℃, and the temperature of a machine head of the extruder is 166-175 ℃.
Example 2: the high-fluidity high-toughness PVC valve injection molding granule comprises the following raw materials, by weight, 90 parts or 100 parts of general PVC resin, 0 part or 10 parts of toughening agent, 2 parts or 4 parts of acrylate type or/and composite ester processing aid, 1.5 parts or 4.0 parts of heat stabilizer, 1.5 parts or 3.0 parts of lubricant, 3 parts or 7 parts of filler, 0.1 part or 0.3 part of light stabilizer and 0.30 part or 0.42 part of toner;
example 3: as optimization of the above embodiment, the general PVC resin is SG8 type resin;
the heat stabilizer is one of methyl tin mercaptide and liquid calcium zinc stabilizer;
the lubricant is more than one of stearic acid, calcium stearate, PE wax and OPE wax (oxidized polyethylene wax);
the toughening agent is MBS resin or resin type Chlorinated Polyethylene (CPE);
the filler is calcium carbonate;
the light stabilizer is titanium dioxide;
the toner is a mixture of carbon black and ultramarine in a weight ratio of 15: 17.
Example 4: as an optimization of the above examples, the high-fluidity high-toughness PVC valve injection molding pellet of the above examples is obtained by the following preparation method: step one, uniformly mixing required amount of raw materials to obtain a mixture, heating the mixture to 105 ℃ or 120 ℃ while stirring to obtain a high-temperature material, and cooling the high-temperature material to 30 ℃ or 45 ℃ to obtain a granulation material; and secondly, extruding and granulating the granulated material by using an extruder to obtain high-fluidity high-toughness PVC valve injection molding granules, wherein the temperature of a charging barrel of the extruder is 150 ℃ or 165 ℃, and the temperature of a machine head of the extruder is 166 ℃ or 175 ℃.
The high-fluidity high-toughness PVC valve injection molding granule prepared by the formula provided by the embodiment of the invention has the advantages of good granule color degree, higher fluidity, high toughness, heat resistance, corrosion resistance and the like, overcomes the defects of the existing PVC valve injection molding granule product, is simple in preparation method, can be used for injection molding production of engineering plastic valve parts, and can meet the fluidity and toughness requirements of PVC valve granules by blending and modifying PVC to improve the toughness and rigidity of PVC, so that the disadvantage of diversity of raw materials of the existing valve parts is solved, and the product cost is reduced.
The high-fluidity and high-toughness PVC valve molding pellets obtained in examples 5 to 8 will be described below.
Example 5: the high-fluidity high-toughness PVC valve injection molding aggregate comprises the following components in parts by weight: 100 parts of general resin, 2.8 parts of methyl tin mercaptide, 5 parts of MBS resin, 4 parts of CPE, 1.4 parts of calcium stearate, 0.2 part of OPE wax, 0.5 part of PE wax, 2.1 parts of P551A 2.1, 1.4 parts of processing aid G-121.4 parts of calcium carbonate, 0.15 part of carbon black, 0.17 part of ultramarine and 0.30 part of titanium dioxide;
weighing the corresponding components according to the determined parts of the formula, adding the components into a high-speed mixer for high-speed mixing, blending the materials, heating to 120 ℃, stopping high-speed stirring, discharging the materials into a low-speed cold mixing pot, cooling the materials to 40 ℃ to obtain granules, extruding and granulating the granules by an extruder to obtain high-fluidity high-toughness PVC valve injection granules, wherein the temperature of a charging barrel of a granulator is controlled to 156 ℃, 160 ℃, 163 ℃ and 165 ℃ in sequence, and the temperature of a head of the granulator is controlled to 166 ℃,167 ℃, 169 ℃ and 172 ℃ in sequence.
In example 5, P551A and processing aid G-12 were used as the acrylate-based or/and complex ester-based processing aid.
Example 6: the high-fluidity high-toughness PVC valve injection molding aggregate comprises the following components in parts by weight: 100 parts of general resin, 4 parts of liquid calcium and zinc, 2.5 parts of MBS resin, 3 parts of CPE, 1.4 parts of calcium stearate, 0.3 part of OPE wax, 0.6 part of PE wax, 2.5 parts of P551A 2.5, 1-121.4 parts of processing aid A, 5 parts of light calcium carbonate, 0.15 part of carbon black, 0.17 part of ultramarine and 0.30 part of titanium dioxide;
weighing the corresponding components according to the formula design requirement, adding the components into a high-speed mixer for high-speed mixing, heating the materials to 105 ℃ through full mixing, stopping high-speed stirring, discharging the materials into a low-speed cold mixing pot, cooling the materials to 30 ℃ to obtain granules, extruding and granulating the granules by using an extruder to obtain high-fluidity high-toughness PVC valve injection granules, wherein the temperature of a material cylinder of the extruder is sequentially controlled to be 152 ℃, 155 ℃, 159 ℃ and 163 ℃, and the temperature of a machine head of the granulator is sequentially controlled to be 167 ℃,168 ℃, 169 ℃ and 173 ℃.
In example 6, P551A and the processing aid A-12 were used as the acrylate-based or/and complex ester-based processing aid.
Example 7: the high-fluidity high-toughness PVC valve injection molding aggregate comprises the following components in parts by weight: 90 parts of general resin, 1.8 parts of methyl tin mercaptide, 4 parts of MBS resin, 4 parts of CPE, 1.1 parts of calcium stearate, 0.2 part of OPE wax, 0.5 part of PE wax, 1.5 parts of P551A 1.5, 1.4 parts of processing aid G-121.4 parts, 7 parts of calcium carbonate, 0.15 part of carbon black, 0.17 part of ultramarine and 0.40 part of titanium dioxide;
weighing the corresponding components according to the determined parts of the formula, adding the components into a high-speed mixer for high-speed mixing, blending the materials, heating to 120 ℃, stopping high-speed stirring, discharging the materials into a low-speed cold mixing pot, cooling the materials to 40 ℃ to obtain granules, extruding and granulating the granules by an extruder to obtain high-fluidity high-toughness PVC valve injection granules, wherein the temperature of a charging barrel of a granulator is controlled to 156 ℃, 160 ℃, 163 ℃ and 165 ℃ in sequence, and the temperature of a head of the granulator is controlled to 166 ℃,167 ℃, 169 ℃ and 172 ℃ in sequence.
In example 7, P551A and processing aid G-12 were used as the acrylate-based or/and complex ester-based processing aid.
Example 8: the high-fluidity high-toughness PVC valve injection molding aggregate comprises the following components in parts by weight: 90 parts of general resin, 6 parts of liquid calcium and zinc, 2 parts of MBS resin, 3 parts of CPE, 1.4 parts of calcium stearate, 0.5 part of OPE wax, 0.6 part of PE wax, 2.1 parts of P551A 2.1, 1-121.4 parts of processing aid A, 5 parts of light calcium carbonate, 0.15 part of carbon black, 0.17 part of ultramarine and 0.40 part of titanium dioxide;
weighing the corresponding components according to the formula design requirement, adding the components into a high-speed mixer for high-speed mixing, heating the materials to 105 ℃ through full mixing, stopping high-speed stirring, discharging the materials into a low-speed cold mixing pot, cooling the materials to 30 ℃ to obtain granules, extruding and granulating the granules by using an extruder to obtain high-fluidity high-toughness PVC valve injection granules, wherein the temperature of a material cylinder of the extruder is sequentially controlled to be 152 ℃, 155 ℃, 159 ℃ and 163 ℃, and the temperature of a machine head of the granulator is sequentially controlled to be 167 ℃,168 ℃, 169 ℃ and 173 ℃.
In this example 8, P551A and the processing aid A-12 were used as the acrylate-based or/and complex ester-based processing aid.
In the above examples 5 to 8, the general-purpose resin was SG8 type resin, available from Xinjiang Thai chemical Co., Ltd;
the MBS resin can be provided by Taiwan plastic industry Co.Ltd, and has the model number of M41;
P551A is a methacrylic acid type PVC processing aid, brand: mitsubishi, chinese name: methacrylic acid type PVC processing aid, type: P551A;
the processing aid G-12 is a lactone-based release processing aid, model G-12, produced by Indian auxiliaries, Inc.
The processing aid A-12 is an A-12 lubricant supplied by Oleofine Organics (Thailand) Co.
The high-fluidity and high-toughness PVC valve molding pellets obtained in examples 1 and 5 to 8 had the properties of fluidity (balance torque), toughness (notched impact strength), heat resistance (Vicat softening temperature) and the like as shown in Table 1.
The properties of the PVC valve bodies of DN160 produced from the high-fluidity high-toughness PVC valve injection molding pellets prepared in examples 5 to 8 are shown in Table 2.
As can be seen from tables 1 and 2, the high-fluidity high-toughness PVC valve injection molding pellets prepared according to the embodiments 5 to 8 have higher vicat softening temperature and higher notch impact strength, and the balance torque and tensile strength of the high-fluidity high-toughness PVC valve injection molding pellets prepared according to the embodiments 5 to 8 are equivalent to those of the existing general PVC valve pellets, that is, the high-fluidity high-toughness PVC valve injection molding pellets prepared according to the embodiments 5 to 8 have the characteristics of high fluidity, high toughness, heat resistance and the like; meanwhile, the PVC valve body produced by using the high-fluidity high-toughness PVC valve injection molding granules prepared by the invention to produce DN160 also has equivalent performance.
The technical characteristics form an embodiment of the invention, which has strong adaptability and implementation effect, and unnecessary technical characteristics can be increased or decreased according to actual needs to meet the requirements of different situations.
Claims (10)
1. The high-fluidity high-toughness PVC valve injection molding granule is characterized by comprising, by weight, 90-100 parts of general PVC resin, 0-10 parts of toughening agent, 2-4 parts of acrylate type or/and composite ester processing aid, 1.5-4.0 parts of heat stabilizer, 1.5-3.0 parts of lubricant, 3-7 parts of filler, 0.1-0.3 part of light stabilizer and 0.30-0.42 part of toner.
2. The high-fluidity high-toughness PVC valve injection molding pellet according to claim 1, wherein the general PVC resin is SG8 type resin.
3. The high-fluidity high-toughness PVC valve injection molding pellet as claimed in claim 1 or 2, wherein the heat stabilizer is one of tin methyl mercaptide and liquid calcium zinc stabilizer; and/or the lubricant is more than one of stearic acid, calcium stearate, PE wax and OPE wax.
4. The high-fluidity high-toughness PVC valve injection molding pellet as claimed in claim 1 or 2, wherein the toughening agent is MBS resin or resin type chlorinated polyethylene.
5. The high-fluidity high-toughness PVC valve injection molding pellet as claimed in claim 3, wherein the toughening agent is MBS resin or resin type chlorinated polyethylene.
6. The high-fluidity high-toughness PVC valve injection molding pellet according to claim 1, 2 or 5, wherein the filler is calcium carbonate; or/and the light stabilizer is titanium dioxide; or/and the toner is a mixture of carbon black and ultramarine blue in a weight ratio of 15: 17.
7. The high flow, high toughness PVC valve injection molding pellet according to claim 3, characterized in that the filler is calcium carbonate; or/and the light stabilizer is titanium dioxide; or/and the toner is a mixture of carbon black and ultramarine blue in a weight ratio of 15: 17.
8. The high flow, high toughness PVC valve injection molding pellet according to claim 4, characterized in that the filler is calcium carbonate; or/and the light stabilizer is titanium dioxide; or/and the toner is a mixture of carbon black and ultramarine blue in a weight ratio of 15: 17.
9. The high-fluidity high-toughness PVC valve injection molding pellet as claimed in any one of claims 1 to 8, which is obtained by the following method: step one, uniformly mixing required amount of raw materials to obtain a mixture, heating the mixture to 105-120 ℃ while stirring to obtain a high-temperature material, and cooling the high-temperature material to 30-45 ℃ to obtain a granulation material; and secondly, extruding and granulating the granulated material by using an extruder to obtain high-fluidity high-toughness PVC valve injection molding granules, wherein the temperature of a charging barrel of the extruder is 150-165 ℃, and the temperature of a machine head of the extruder is 166-175 ℃.
10. A method for preparing high-fluidity high-toughness PVC valve injection molding pellets according to any one of claims 1 to 8, characterized by comprising the following steps: step one, uniformly mixing required amount of raw materials to obtain a mixture, heating the mixture to 105-120 ℃ while stirring to obtain a high-temperature material, and cooling the high-temperature material to 30-45 ℃ to obtain a granulation material; and secondly, extruding and granulating the granulated material by using an extruder to obtain high-fluidity high-toughness PVC valve injection molding granules, wherein the temperature of a charging barrel of the extruder is 150-165 ℃, and the temperature of a machine head of the extruder is 166-175 ℃.
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| CN112920529A (en) * | 2021-03-10 | 2021-06-08 | 新疆中泰化学阜康能源有限公司 | Special PVC valve injection molding granule for drip irrigation and preparation method thereof |
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Application publication date: 20201229 |