CN111171473B - Large-diameter PVC-U water supply accessory injection molding granules and preparation method thereof - Google Patents
Large-diameter PVC-U water supply accessory injection molding granules and preparation method thereof Download PDFInfo
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- CN111171473B CN111171473B CN202010070735.7A CN202010070735A CN111171473B CN 111171473 B CN111171473 B CN 111171473B CN 202010070735 A CN202010070735 A CN 202010070735A CN 111171473 B CN111171473 B CN 111171473B
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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
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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
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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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Abstract
The invention belongs to the technical field of polyvinyl chloride plastic pipeline materials, and particularly relates to large-caliber PVC-U water supply accessory injection molding granules and a preparation method thereof. The injection molding granule takes the active calcium carbonate and the nano silicon dioxide as fillers, and the active calcium carbonate and the nano silicon dioxide are jointly used, so that the stability, hardness and rigidity of the injection molding granule can be obviously improved, the softening temperature of the prepared large-caliber PVC-U water supply accessory card is higher, the problems of cracking, layering, leakage and the like do not exist even after hydraulic pressure, drying oven and drop tests, the problems of cracking, brittleness, leakage and the like can be reduced, the preparation method is simple, the operation is easy, and the large-scale industrial production is facilitated.
Description
Technical Field
The invention belongs to the technical field of polyvinyl chloride plastic pipeline materials. More particularly relates to injection molding granules of a large-caliber PVC-U water supply fitting and a preparation method thereof.
Background
As a general plastic material, the hard polyvinyl chloride (PVC-U) has the characteristics of flame retardancy, chemical corrosion resistance, wear resistance, good insulativity, high mechanical strength and the like, so the PVC-U is widely applied to the fields of chemical industry, building materials, light industry, household appliances, packaging and the like. In recent years, with the continuous promotion of urbanization in China, plastic materials are rapidly developed in the domestic building material pipeline industry, traditional metal pipes are gradually replaced, and the caliber of the used products is larger and larger. For example, the chinese patent application CN100457424A discloses a production process of a large-caliber hard polyvinyl chloride double-wall corrugated pipe, the process takes PVC resin, a composite heat stabilizer, stearic acid, PE wax, chlorinated polyethylene, and calcium carbonate as raw materials, and the raw materials are mixed and then kneaded, stirred, extruded, and formed to obtain the large-caliber hard polyvinyl chloride double-wall corrugated pipe, thereby solving the problems of unsmooth material flow, material adhesion and the like in the production process, but with the increase of the caliber, the mechanical properties of the corrugated pipe are reduced, so the large-caliber hard polyvinyl chloride double-wall corrugated pipe obtained by the preparation method has the problems of cracking, brittleness, leakage and the like.
Therefore, the injection molding granules of the large-caliber PVC-U water supply fittings with good mechanical properties and the preparation method thereof are urgently needed.
Disclosure of Invention
The invention aims to solve the technical problems that the large-caliber PVC-U water supply accessory prepared from the injection molding granules prepared by the prior art has poor mechanical property and has the problems of cracking, brittleness, leakage and the like, and provides the large-caliber PVC-U water supply accessory injection molding granules with good mechanical property.
Another object of the present invention is to provide a process for the preparation of said injection-molded pellets.
The invention also aims to provide a large-caliber PVC-U water supply accessory prepared from the injection molding granules.
The above purpose of the invention is realized by the following technical scheme:
the injection molding pellet for the large-caliber PVC-U water supply fitting is prepared from the following raw materials in parts by weight: 100 parts of polyvinyl chloride, 0.3-5 parts of calcium-zinc stabilizer, 1-4 parts of oxidized polyethylene wax, 5-10 parts of MBS impact modifier, 1-3 parts of ACR processing modification auxiliary agent, 0.5-2 parts of antioxidant, 1-4 parts of activated calcium carbonate, 2-10 parts of nano silicon dioxide and 1-3 parts of pigment.
According to the invention, the activated calcium carbonate and the nano-silica are used as fillers, wherein the calcium carbonate has better compatibility after being treated and activated, and can be used together with the nano-silica, so that the stability, hardness and rigidity of the injection molding granules can be obviously improved, the prepared large-caliber PVC-U water supply accessory card has higher softening temperature, and the problems of cracking, layering, leakage and the like can be avoided after hydraulic pressure, drying oven and falling tests, and the problems of cracking, brittleness, leakage and the like can be reduced.
Preferably, the injection molding pellet is prepared from the following raw materials in parts by weight: 100 parts of polyvinyl chloride, 0.3-3 parts of calcium-zinc stabilizer, 1-3 parts of oxidized polyethylene wax, 5-8 parts of MBS impact modifier, 1-2 parts of ACR processing modification auxiliary agent, 0.5-1 part of antioxidant, 2-4 parts of activated calcium carbonate, 5-10 parts of nano silicon dioxide and 1-2 parts of pigment.
More preferably, the injection molding pellet is prepared from the following raw materials in parts by weight: 100 parts of polyvinyl chloride, 1.5 parts of calcium zinc stabilizer, 1 part of oxidized polyethylene wax, 8 parts of MBS impact modifier, 1.5 parts of ACR processing modification auxiliary agent, 0.5 part of antioxidant, 4 parts of active calcium carbonate, 5 parts of nano-silica and 2 parts of pigment. In practice, the injection molding granules prepared under the condition of the raw material proportion have better properties.
Further, the antioxidant is a phenolic antioxidant.
Still further, the pigment is titanium oxide, carbon black, or a colorant.
In addition, the invention also provides a preparation method of the injection molding granule, which comprises the following steps:
stirring and mixing the raw materials at 100-120 ℃, cooling to 40-50 ℃, and performing extrusion granulation to obtain the composite material.
Furthermore, a conical double-screw extruder is adopted for extrusion granulation, the temperature of a machine barrel is 160-200 ℃, and the temperature of a die is 150-200 ℃.
In addition, the invention also provides a large-caliber PVC-U water supply accessory prepared from the injection molding granules.
The invention has the following beneficial effects:
the large-caliber PVC-U water supply accessory injection molding granules provided by the invention take the activated calcium carbonate and the nano silicon dioxide as fillers, and the activated calcium carbonate and the nano silicon dioxide are used together, so that the stability, hardness and rigidity of the injection molding granules can be obviously improved, the prepared large-caliber PVC-U water supply accessory card has higher softening temperature, the problems of cracking, layering, leakage and the like can be avoided after hydraulic pressure, drying oven and falling tests, the problems of cracking, brittleness, leakage and the like can be reduced, the preparation method is simple, the operation is easy, and the large-scale industrial production is facilitated.
Drawings
FIG. 1 is a schematic structural view of a large-caliber PVC-U water supply fitting dn225 tee joint prepared in embodiments 1-3 of the present invention.
Detailed Description
The invention is further described with reference to the drawings and the following detailed description, which are not intended to limit the invention in any way. Reagents, methods and apparatus used in the present invention are conventional in the art unless otherwise indicated.
The calcium zinc stabilizer is purchased from Moghas plastic science and technology Limited, Rishan, of Foshan, and has a model number of HKS698, and the reagents and materials used in the other examples are all purchased from the market.
Example 1 injection molding pellet for large-caliber PVC-U water supply fitting
The large-caliber PVC-U water supply accessory injection molding granules are prepared from the following raw materials in parts by weight:
100 parts of polyvinyl chloride, 1.5 parts of calcium-zinc stabilizer, 1 part of oxidized polyethylene wax, 8 parts of MBS impact modifier, 1.5 parts of ACR processing modification auxiliary agent, 0.5 part of phenol antioxidant, 4 parts of active calcium carbonate, 5 parts of nano-silica and 2 parts of titanium oxide.
The preparation method comprises the following steps:
placing the raw materials in a high-speed mixer and a low-speed mixer, stirring and mixing at 105 ℃, cooling to 45 ℃, discharging, adding the uniformly mixed materials into a conical double-screw extruder, setting the cylinder temperature at 160 ℃ and the die temperature at 180 ℃, and carrying out extrusion granulation to obtain the high-speed mixing material.
Example 2 injection molding pellets for large-caliber PVC-U water supply fittings
The large-caliber PVC-U water supply accessory injection molding aggregate is prepared from the following raw materials in parts by weight:
100 parts of polyvinyl chloride, 4 parts of calcium-zinc stabilizer, 0.8 part of oxidized polyethylene wax, 10 parts of MBS impact modifier, 1 part of ACR processing modification auxiliary agent, 1 part of phenol antioxidant, 2 parts of active calcium carbonate, 2 parts of nano-silica and 1 part of carbon black.
The preparation method comprises the following steps:
placing the raw materials in a high-speed mixer and a low-speed mixer, stirring and mixing at 100 ℃, cooling to 40 ℃, discharging, adding the uniformly mixed materials into a conical double-screw extruder, setting the barrel temperature at 180 ℃ and the die temperature at 150 ℃, and carrying out extrusion granulation to obtain the high-speed low-speed high-speed mixing material.
Example 3 injection molding pellets for heavy-calibre PVC-U Water supply fittings
The large-caliber PVC-U water supply accessory injection molding granules are prepared from the following raw materials in parts by weight:
100 parts of polyvinyl chloride, 0.3 part of calcium zinc stabilizer, 4 parts of oxidized polyethylene wax, 5 parts of MBS impact modifier, 3 parts of ACR processing modification auxiliary agent, 2 parts of phenol antioxidant, 1 part of active calcium carbonate, 10 parts of nano silicon dioxide and 3 parts of colorant.
The preparation method comprises the following steps:
placing the raw materials in a high-speed mixer and a low-speed mixer, stirring and mixing at 120 ℃, cooling to 50 ℃, discharging, adding the uniformly mixed materials into a conical double-screw extruder, setting the barrel temperature at 200 ℃ and the die temperature at 200 ℃, and carrying out extrusion granulation to obtain the high-speed mixing material.
Comparative example 1 an injection molding pellet
The difference from example 1 is that comparative example 1 removes the nano silica and increases the amount of activated calcium carbonate to 9 parts, and the rest of the parameters and operations refer to example 1.
Comparative example 2 an injection molding pellet
The difference from example 1 is that comparative example 2 removes the activated calcium carbonate and increases the amount of nano silica to 9 parts, and the rest of the parameters and operations refer to example 1.
Comparative example 3 an injection molding pellet
The difference from example 1 is that comparative example 3 replaces the activated calcium carbonate with calcium carbonate and the rest of the parameters and operations refer to example 1.
Comparative example 4 an injection-molded pellet
The difference from example 1 is that comparative example 4 replaces nanosilica with silica, and the rest of the parameters and operations refer to example 1.
Experimental example 1 preparation of Large-caliber PVC-U Water supply fitting dn225 tee by injection molding of pellets
The injection molding pellets of the examples 1-3 and the comparative examples 1-4 are prepared into a large-caliber PVC-U water supply fitting dn225 positive tee, and the physical and mechanical properties of the positive tee are tested by referring to national standards GB/T10002.2-2003, GB/T8803-2001 and GB/T8801, and the test results are shown in Table 1.
Table 1 results of physical and mechanical property tests of tee joints prepared from injection-molded pellets of examples 1 to 3 and comparative examples 1 to 4
As can be seen from Table 1, the water supply fittings prepared from the injection molding granules of the embodiments 1-3 of the invention have higher Vicat softening temperature, and the results of hydraulic pressure, drying oven and drop test show that the water supply fittings meet the requirements and have good performances; the Vicat softening temperature of the water supply fittings prepared by the injection molding granules of comparative examples 1-4 (the active calcium carbonate or the nano silicon dioxide is removed or replaced) is obviously reduced, and the water supply fittings can not pass hydraulic pressure, oven and falling tests.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (5)
1. A large-caliber PVC-U water supply accessory is characterized in that the water supply accessory is prepared from injection molding granules; the injection molding pellet is prepared from the following raw materials in parts by weight: 100 parts of polyvinyl chloride, 0.3-5 parts of calcium-zinc stabilizer, 1-4 parts of oxidized polyethylene wax, 5-10 parts of MBS impact modifier, 1-3 parts of ACR processing modification auxiliary agent, 0.5-2 parts of antioxidant, 1-4 parts of activated calcium carbonate, 2-10 parts of nano silicon dioxide and 1-3 parts of pigment;
the antioxidant is a phenolic antioxidant, and the pigment is titanium oxide or carbon black.
2. The water supply accessory of claim 1, wherein the injection molded pellets are made from the following raw materials and parts by weight: 100 parts of polyvinyl chloride, 0.3-3 parts of calcium-zinc stabilizer, 1-3 parts of oxidized polyethylene wax, 5-8 parts of MBS impact modifier, 1-2 parts of ACR processing modification auxiliary agent, 0.5-1 part of antioxidant, 2-4 parts of activated calcium carbonate, 5-10 parts of nano silicon dioxide and 1-2 parts of pigment.
3. The water supply accessory of claim 2, wherein the injection molded pellets are made from the following raw materials and parts by weight: 100 parts of polyvinyl chloride, 1.5 parts of calcium zinc stabilizer, 1 part of oxidized polyethylene wax, 8 parts of MBS impact modifier, 1.5 parts of ACR processing modification auxiliary agent, 0.5 part of antioxidant, 4 parts of active calcium carbonate, 5 parts of nano-silica and 2 parts of pigment.
4. The water supply fitting according to any one of claims 1 to 3, wherein the injection-molded pellets are prepared by a method comprising the steps of:
stirring and mixing the raw materials at 100-120 ℃, cooling to 40-50 ℃, and performing extrusion granulation to obtain the composite material.
5. The water supply accessory of claim 4, wherein the extrusion granulation adopts a conical twin-screw extruder, the temperature of a machine barrel is 160-200 ℃, and the temperature of a die is 150-200 ℃.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2019113788580 | 2019-12-27 | ||
| CN201911378858 | 2019-12-27 |
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| Publication Number | Publication Date |
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| CN111171473A CN111171473A (en) | 2020-05-19 |
| CN111171473B true CN111171473B (en) | 2022-05-06 |
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| CN202010070735.7A Active CN111171473B (en) | 2019-12-27 | 2020-01-21 | Large-diameter PVC-U water supply accessory injection molding granules and preparation method thereof |
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| CN113831664A (en) * | 2021-09-29 | 2021-12-24 | 广东联塑科技实业有限公司 | Large-caliber PVC pipe material and preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1624040A (en) * | 2003-12-05 | 2005-06-08 | 山东春潮色母料有限公司 | Particle material for water supply UPVC pipe and its preparation method |
| CN104262852A (en) * | 2014-10-17 | 2015-01-07 | 苏州市涵信塑业有限公司 | Polyvinyl chloride plastic particle modified by silica nanoparticle |
| CN105623153A (en) * | 2016-03-23 | 2016-06-01 | 潘豪杰 | Nano-silicon dioxide toughened PVC (polyvinyl chloride) corrugated pipe and preparation method therefor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7130935B2 (en) * | 2017-10-13 | 2022-09-06 | 信越化学工業株式会社 | Polyvinyl chloride resin molded product and its manufacturing method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1624040A (en) * | 2003-12-05 | 2005-06-08 | 山东春潮色母料有限公司 | Particle material for water supply UPVC pipe and its preparation method |
| CN104262852A (en) * | 2014-10-17 | 2015-01-07 | 苏州市涵信塑业有限公司 | Polyvinyl chloride plastic particle modified by silica nanoparticle |
| CN105623153A (en) * | 2016-03-23 | 2016-06-01 | 潘豪杰 | Nano-silicon dioxide toughened PVC (polyvinyl chloride) corrugated pipe and preparation method therefor |
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