CN111040332A - Hard PVC pipe and production method thereof - Google Patents
Hard PVC pipe and production method thereof Download PDFInfo
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- CN111040332A CN111040332A CN201911159351.6A CN201911159351A CN111040332A CN 111040332 A CN111040332 A CN 111040332A CN 201911159351 A CN201911159351 A CN 201911159351A CN 111040332 A CN111040332 A CN 111040332A
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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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
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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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
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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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
- C08L2205/06—Polymer mixtures characterised by other features having improved processability or containing aids for moulding methods
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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)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a hard PVC pipe which comprises the following raw materials in parts by weight: 80-120 parts of PVC resin, 1-3 parts of heat stabilizer, 8-20 parts of filler, 0.5-3 parts of impact modifier, 0.5-2 parts of lubricant, 0.5-2 parts of carbon fiber and 0.1-0.8 part of konjac flour; simultaneously discloses a production method of the hard PVC pipe, which comprises the steps of raw material mixing, extrusion molding, cooling, shaping, pipe drawing, packaging, cutting, inspecting and product warehousing; according to the invention, by optimizing the formula of the rigid PVC pipe, the rheological uniformity of the plastic is obviously improved, the formability of the plastic is improved, and the raw material has strong plasticizing capacity, excellent processing flow property, stability, strength and impact resistance.
Description
Technical Field
The invention relates to the technical field of pipe processing, in particular to a hard PVC pipe and a production method thereof.
Background
The PVC pipe mainly comprises polyvinyl chloride, and other components are added to enhance the heat resistance, toughness and ductility of the PVC pipe. It is a synthetic material that is enjoyed, popular and widely used in the world today. Its global usage is second highest among various synthetic materials. It is only in 1995 a year that PVC has been statistically produced in europe at around five million tons and consumed at five million thirty million tons. In germany, the production and consumption of PVC averages one hundred and forty million tons.
PVC can be divided into soft PVC and hard PVC, wherein hard PVC approximately accounts for 2/3 in the market, and hard PVC does not contain a plasticizer, is easy to form and has good physical properties, so that the hard PVC pipe has great development and application values and is widely applied to various fields.
Disclosure of Invention
The invention aims to: the hard PVC pipe and the production method thereof can obviously improve the rheological uniformity of raw materials, improve the formability, enable the raw materials to have stronger plasticizing capacity and excellent processing flow property, and ensure the pipe to have good stability, strength and impact resistance by the mutual matching of the raw materials.
The technical scheme adopted by the invention is as follows:
in order to achieve the purpose, the invention provides a hard PVC pipe which comprises the following raw materials in parts by weight: 80-120 parts of PVC resin, 1-3 parts of heat stabilizer, 8-20 parts of filler, 0.5-3 parts of impact modifier, 0.5-2 parts of lubricant, 0.5-2 parts of carbon fiber and 0.1-0.8 part of konjac flour.
Preferably, the heat stabilizer comprises a rare earth composite stabilizer and a calcium zinc stabilizer.
Preferably, the mass ratio of the rare earth composite stabilizer to the calcium-zinc stabilizer is 1: 1.
Preferably, the filler comprises precipitated calcium carbonate, china clay and calcium sulphate.
Preferably, the mass ratio of the light calcium carbonate to the argil to the calcium sulfate is 1 (2-5) to 1.5.
Preferably, the impact modifier is ACR or CPE.
Preferably, the lubricant is any one or a mixture of barium stearate, lead stearate and calcium stearate.
The invention also provides a production method of the hard PVC pipe, which comprises the following steps:
(1) mixing raw materials: adding PVC resin, a heat stabilizer, an impact modifier, a lubricant, carbon fibers, konjac flour and a filler into a mixer in sequence, starting cold mixing after the temperature is raised to 100-120 ℃, and discharging the materials when the temperature is lowered to 30-50 ℃;
(2) and (3) extrusion molding: conveying the discharged materials into a hopper of a double-screw extruder, extruding the pipes from a die opening, wherein the rotating speed of a screw is 15-30 r/min;
(3) cooling and shaping: cooling and shaping the section by a vacuum shaping cooler;
(4) pipe traction: the tractor continuously and automatically leads the cooled and hardened section bar out of the machine head, so that the section bar is continuously produced;
(5) packaging: spraying a code to print a pipe identification, and automatically winding a film for packaging by a packaging machine;
(6) cutting: cutting the pipe material by a cutting machine in a fixed length;
(7) and (4) checking: putting the cut product into inspection equipment to inspect whether the product has defective products or not;
(8) warehousing products: and packaging the qualified products and warehousing.
Preferably, the twin-screw extruder in step (2) is divided into 3 zones: a solid conveying area, a material plasticizing area and a melt conveying area; the temperature of the solid conveying area is controlled to be 100-140 ℃, the temperature of the material plasticizing area is controlled to be 140-190 ℃, and the temperature of the melt conveying area is controlled to be 160-180 ℃.
Preferably, the process conditions of the vacuum setting in the step (3) are as follows: the vacuum degree is 20-53 KPa, and the water temperature is 15-25 ℃.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the invention, the heat stabilizer, the filler, the impact modifier, the lubricant and other additives are added into the formula, so that the rheological uniformity of the raw materials can be obviously improved, the formability of the raw materials can be improved, the raw materials have stronger plasticizing capacity and superior processing flow performance, and the raw materials are matched with each other, so that the pipe is ensured to have good stability, strength and impact resistance.
2. The carbon fiber and the konjac flour are added, so that the compatibility of a formula system is effectively improved, the interfaces of all materials can be linked to form a net structure, the bonding force between a high polymer material and an inorganic material is increased, and the effect of strengthening and toughening is achieved, so that the strength and the impact resistance of the pipe are greatly improved.
3. The raw materials and the auxiliary agents used in the invention are nontoxic and harmless, are green and environment-friendly, have low production cost, and have simple and easy cutting process.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A hard PVC pipe comprises the following raw materials in parts by weight: 80 parts of PVC resin, 2 parts of heat stabilizer (the mass ratio of the rare earth composite stabilizer to the calcium-zinc stabilizer is 1:1), 15 parts of filler (the mass ratio of calcium carbonate, argil and calcium sulfate is 1:2:1.5), 1 parts of impact modifier ACR1 parts, 0.5 part of barium stearate, 0.5 part of carbon fiber and 0.5 part of konjac flour.
Example 2
A hard PVC pipe comprises the following raw materials in parts by weight: 90 parts of PVC resin, 1 part of heat stabilizer (the mass ratio of the rare earth composite stabilizer to the calcium-zinc stabilizer is 1:1), 18 parts of filler (the mass ratio of calcium carbonate, argil and calcium sulfate is 1:3:1.5), 0.5 part of impact modifier CPE, 1.2 parts of calcium stearate, 1 part of carbon fiber and 1 part of konjac flour.
Example 3
A hard PVC pipe comprises the following raw materials in parts by weight: 100 parts of PVC resin, 3 parts of heat stabilizer (the mass ratio of the rare earth composite stabilizer to the calcium-zinc stabilizer is 1:1), 8 parts of filler (the mass ratio of calcium carbonate, argil and calcium sulfate is 1:3.5:1.5), 2 parts of impact modifier CPE, 1 part of lead stearate and calcium stearate, 2 parts of carbon fiber and 0.5 part of konjac flour.
Example 4
A hard PVC pipe comprises the following raw materials in parts by weight: 110 parts of PVC resin, 3 parts of heat stabilizer (the mass ratio of the rare earth composite stabilizer to the calcium-zinc stabilizer is 1:1), 20 parts of filler (the mass ratio of calcium carbonate, argil and calcium sulfate is 1:5:1.5), 3 parts of impact modifier ACR, 1.5 parts of barium stearate and lead stearate, 1.5 parts of carbon fiber and 1.2 parts of konjac flour.
Example 5
A hard PVC pipe comprises the following raw materials in parts by weight: 120 parts of PVC resin, 2 parts of heat stabilizer (the mass ratio of the rare earth composite stabilizer to the calcium-zinc stabilizer is 1:1), 10 parts of filler (the mass ratio of calcium carbonate, argil and calcium sulfate is 1:4:1.5), 2.5 parts of impact modifier ACR, 2 parts of barium stearate and lead stearate, 1.7 parts of carbon fiber and 1.5 parts of konjac flour.
Example 6
The production method of the rigid PVC pipe in any embodiment of embodiments 1 to 5 includes the following steps:
(1) mixing raw materials: adding PVC resin, a heat stabilizer, an impact modifier, a lubricant, carbon fibers, konjac flour and a filler into a mixer in sequence, starting cold mixing after the temperature is raised to 100-120 ℃, and discharging the materials when the temperature is lowered to 30-50 ℃;
(2) and (3) extrusion molding: the discharged materials are conveyed into a hopper of a double-screw extruder, the pipe is extruded from a die opening, the rotating speed of a screw is 15-30 r/min, and the double-screw extruder is divided into 3 zones: a solid conveying area, a material plasticizing area and a melt conveying area; the temperature of the solid conveying area is controlled to be 100-140 ℃, the temperature of the material plasticizing area is controlled to be 140-190 ℃, and the temperature of the melt conveying area is controlled to be 160-180 ℃;
(3) cooling and shaping: the vacuum shaping cooler is used for cooling and shaping the section, and the process conditions of the vacuum shaping are as follows: the vacuum degree is 20-53 KPa, and the water temperature is 15-25 ℃;
(4) pipe traction: the tractor continuously and automatically leads the cooled and hardened section bar out of the machine head, so that the section bar is continuously produced;
(5) packaging: spraying a code to print a pipe identification, and automatically winding a film for packaging by a packaging machine;
(6) cutting: cutting the pipe material by a cutting machine in a fixed length;
(7) and (4) checking: putting the cut product into inspection equipment to inspect whether the product has defective products or not;
(8) warehousing products: and packaging the qualified products and warehousing.
The PVC pipe material of the invention is tested for tensile strength, bending strength, impact strength of a simple beam notch and elongation at break according to a conventional method, and the results are shown in Table 1.
TABLE 1 Performance test data for PVC pipes of the present invention
As can be seen from the data in Table 1, the PVC pipe prepared by the invention has the advantages of high strength, high toughness, strong impact resistance and the like, and the variety and application range of hard PVC are expanded.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; these modifications and substitutions do not cause the essence of the corresponding technical solution to depart from the scope of the technical solution of the embodiments of the present invention, and are intended to be covered by the claims and the specification of the present invention.
Claims (10)
1. The hard PVC pipe is characterized by comprising the following raw materials in parts by weight: 80-120 parts of PVC resin, 1-3 parts of heat stabilizer, 8-20 parts of filler, 0.5-3 parts of impact modifier, 0.5-2 parts of lubricant, 0.5-2 parts of carbon fiber and 0.1-0.8 part of konjac flour.
2. A rigid PVC pipe according to claim 1, wherein the heat stabilizer comprises a rare earth composite stabilizer and a calcium zinc stabilizer.
3. The hard PVC pipe material as recited in claim 2, wherein the mass ratio of the rare earth composite stabilizer to the calcium zinc stabilizer is 1: 1.
4. A rigid PVC pipe according to claim 1, wherein the filler comprises precipitated calcium carbonate, china clay and calcium sulphate.
5. The hard PVC pipe material is characterized in that the mass ratio of the light calcium carbonate to the argil to the calcium sulfate is 1 (2-5) to 1.5.
6. A rigid PVC pipe according to claim 1, wherein the impact modifier is ACR or CPE.
7. A rigid PVC pipe according to claim 1, wherein the lubricant is selected from any one or a mixture of barium stearate, lead stearate and calcium stearate.
8. The method for producing the rigid PVC pipe according to any one of claims 1 to 7, comprising the steps of:
(1) mixing raw materials: adding PVC resin, a heat stabilizer, an impact modifier, a lubricant, carbon fibers, konjac flour and a filler into a mixer in sequence, starting cold mixing after the temperature is raised to 100-120 ℃, and discharging the materials when the temperature is lowered to 30-50 ℃;
(2) and (3) extrusion molding: conveying the discharged materials into a hopper of a double-screw extruder, extruding the pipes from a die opening, wherein the rotating speed of a screw is 15-30 r/min;
(3) cooling and shaping: cooling and shaping the section by a vacuum shaping cooler;
(4) pipe traction: the tractor continuously and automatically leads the cooled and hardened section bar out of the machine head, so that the section bar is continuously produced;
(5) packaging: spraying a code to print a pipe identification, and automatically winding a film for packaging by a packaging machine;
(6) cutting: cutting the pipe material by a cutting machine in a fixed length;
(7) and (4) checking: putting the cut product into inspection equipment to inspect whether the product has defective products or not;
(8) warehousing products: and packaging the qualified products and warehousing.
9. The process for the production of rigid PVC tubing as claimed in claim 8, wherein in step (2) the twin screw extruder is divided into 3 zones: a solid conveying area, a material plasticizing area and a melt conveying area; the temperature of the solid conveying area is controlled to be 100-140 ℃, the temperature of the material plasticizing area is controlled to be 140-190 ℃, and the temperature of the melt conveying area is controlled to be 160-180 ℃.
10. The method for producing rigid PVC pipe according to claim 8, wherein the vacuum forming in step (3) is carried out under the following conditions: the vacuum degree is 20-53 KPa, and the water temperature is 15-25 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911159351.6A CN111040332A (en) | 2019-11-22 | 2019-11-22 | Hard PVC pipe and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911159351.6A CN111040332A (en) | 2019-11-22 | 2019-11-22 | Hard PVC pipe and production method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN111040332A true CN111040332A (en) | 2020-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911159351.6A Withdrawn CN111040332A (en) | 2019-11-22 | 2019-11-22 | Hard PVC pipe and production method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113265112A (en) * | 2021-05-13 | 2021-08-17 | 河南康宅塑业有限公司 | Method for improving stability of PVC-U pipe fitting |
-
2019
- 2019-11-22 CN CN201911159351.6A patent/CN111040332A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113265112A (en) * | 2021-05-13 | 2021-08-17 | 河南康宅塑业有限公司 | Method for improving stability of PVC-U pipe fitting |
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Application publication date: 20200421 |