CN112944056A - Multifunctional polyethylene composite pipe for conveying liquid food and preparation method thereof - Google Patents
Multifunctional polyethylene composite pipe for conveying liquid food and preparation method thereof Download PDFInfo
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- CN112944056A CN112944056A CN202110198807.0A CN202110198807A CN112944056A CN 112944056 A CN112944056 A CN 112944056A CN 202110198807 A CN202110198807 A CN 202110198807A CN 112944056 A CN112944056 A CN 112944056A
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- liquid food
- composite pipe
- molecular weight
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- polyethylene
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
- F16L9/147—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and plastics with or without reinforcement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/001—Pipes; Pipe joints
Abstract
The invention relates to the field of pipeline manufacturing, in particular to a multifunctional polyethylene composite pipe for conveying liquid food and a preparation method thereof. The multifunctional polyethylene composite pipe for conveying liquid food comprises an inner liner layer, an enhancement layer and a coating layer, wherein the inner liner layer is made of 0.5% -10% of fluorosilicone master batch modified ultra-high molecular weight polyethylene, the molecular weight of the polyethylene is 250 ten thousand, the enhancement layer comprises a steel wire mesh formed by winding, and the coating layer is made of 50% -80% of polyvinylidene fluoride and ABS resin blending materials. The composite pipe is made of ultra-high molecular weight polyethylene, polyvinylidene fluoride and ABS, has small friction with the conveyed liquid, is integrally water-resistant and gas-resistant, has strong impact resistance, and is an ideal liquid food conveying pipeline.
Description
Technical Field
The invention relates to the field of pipeline manufacturing, in particular to a multifunctional polyethylene composite pipe for conveying liquid food and a preparation method thereof.
Background
The liquid food conveying pipe is mainly made of steel pipes and plastic pipes, and the plastic pipes are mainly made of polyurethane, silica gel, polyethylene pipes and the like. Due to the complex composition of the liquid food, the transportation pipes may be corroded and worn. The steel pipe is resistant to abrasion, but is prone to corrosion; conventional plastic pipes are corrosion resistant but wear prone, which is also a major bottleneck limiting the development of liquid food conveying pipes. The ultra-high molecular weight polyethylene as a novel thermoplastic engineering plastic has extremely strong corrosion resistance and wear resistance, and can effectively solve the problems of wear and corrosion of liquid food conveying pipelines.
When the traditional liquid food conveying pipe conveys food with high viscosity, the food is easy to adhere and accumulate due to certain friction force of the pipe, so that bacteria breeding is caused, and the food quality is influenced. The ultra-high molecular weight polyethylene has self-lubricating property, particularly after fluorine-silicon modification, the lubricating property of the ultra-high molecular weight polyethylene is further improved, the contact angle can reach 110 degrees, the friction force generated in the process of conveying liquid food is extremely small, and the ultra-high molecular weight polyethylene is very suitable for conveying the liquid food.
The traditional plastic pipeline has limited shock resistance, pipe breaking risk exists in practical use, and the traditional plastic pipeline has limited flame retardance, heat resistance, water and gas resistance and can not be used outdoors for a long time.
Disclosure of Invention
The invention aims to provide a multifunctional polyethylene composite pipe for conveying liquid food, which has small friction force for conveying liquid, integrally blocks water and gas and has strong impact resistance.
In order to achieve the advantages, the multifunctional polyethylene composite pipe for conveying liquid food provided by the invention comprises an inner liner layer, a reinforcing layer and a coating layer, wherein the inner liner layer is made of 0.5-10% of fluorosilicone master batch modified ultra-high molecular weight polyethylene with the molecular weight of 250 ten thousand, the reinforcing layer comprises a wound steel wire mesh, and the coating layer is made of 50-80% of a blend material of polyvinylidene fluoride and ABS resin.
In one embodiment of the invention, the composite tube has an outer diameter of 110 mm and an inner diameter of 90 mm.
In one embodiment of the invention, the steel wire mesh is formed by winding one or more pairs of steel wires around each other, and the winding angle is +/-57 DEG
In an embodiment of the invention, the reinforcing layer further comprises a hot melt adhesive for bonding the lining layer and the coating layer, the hot melt adhesive is prepared by using ultra-high molecular weight polyethylene and polyvinylidene fluoride as base materials, and the content of the polyvinylidene fluoride is 3-10%.
In one embodiment of the invention, the preparation method of the multifunctional liquid food conveying polyethylene composite pipe comprises the following steps:
step one, extruding ultra-high molecular weight polyethylene by using a stretching rheological technology to form an inner liner;
extruding high-temperature-resistant hot melt adhesive outside the lining layer;
winding a steel wire mesh outside the hot melt adhesive to form a reinforcing layer;
and step four, extruding the blending material outside the reinforcing layer to form a coating layer.
In the invention, the ultra-high molecular weight polyethylene, the polyvinylidene fluoride and the ABS are used as the materials of the composite pipe, the friction force between the composite pipe and the conveyed liquid is small, the whole composite pipe is water-resistant and gas-resistant, the impact resistance is strong, and the composite pipe is an ideal liquid food conveying pipeline.
Drawings
Fig. 1 is a schematic structural view of a multifunctional liquid food conveying polyethylene composite pipe according to a first embodiment of the invention.
Fig. 2 shows experimental data of the multifunctional liquid food transport polyethylene composite tube of fig. 1.
Detailed Description
To further explain the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description will be provided with reference to the accompanying drawings and preferred embodiments for describing specific embodiments, structures, features and effects thereof.
Referring to fig. 1, the multifunctional polyethylene composite pipe for conveying liquid food according to the first embodiment of the present invention includes an inner liner 1, a reinforcing layer and a coating layer 2, wherein the inner liner 1 is made of 0.5-10% fluorosilicone masterbatch modified ultra-high molecular weight polyethylene with a molecular weight of 250 ten thousand, the reinforcing layer includes a steel wire mesh 3 formed by winding, and the coating layer is made of 50-80% blend material of polyvinylidene fluoride and ABS resin. The composite tube has an outer diameter of 110 mm and an inner diameter of 90 mm.
The steel wire mesh 3 is formed by mutually winding one or more pairs of steel wires, the reinforcing layer with the winding angle of +/-57 degrees further comprises a hot melt adhesive 4 for bonding the lining layer 1 and the coating layer 2, and the hot melt adhesive 4 is prepared by adopting ultra-high molecular weight polyethylene and polyvinylidene fluoride as base materials, wherein the ultra-high molecular weight polyethylene is mainly used in the hot melt adhesive, and the content of the polyvinylidene fluoride is 3-10%.
The preparation method of the multifunctional polyethylene composite pipe for conveying liquid food comprises the following steps:
step one, extruding ultra-high molecular weight polyethylene by using a stretching rheological technology to form an inner liner;
extruding high-temperature-resistant hot melt adhesive outside the lining layer;
winding a steel wire mesh outside the hot melt adhesive to form a reinforcing layer;
and step four, extruding the blending material outside the reinforcing layer to form a coating layer.
The extensional rheology technology replaces shear rheology of a traditional single-screw extruder with extensional rheology, can retain the molecular weight of an ultrahigh material to the maximum extent, and has the principle of an eccentric rotor volume compression release effect.
Referring to fig. 2, the influence of different amounts of fluorosilicone on ultra-high mechanical properties is shown. After the fluorine silicon is added for modification, the ultrahigh material has better basic performance and higher speed, the surface smoothness is improved, but the mechanical strength is slightly reduced. Wherein, the extrusion speed of the ultra-high pure material is 0.4m/min (55-caliber pipe), and the maximum speed can reach 0.55m/min after the fluorine-silicon modification is used. The smoothness index can be characterized by a contact angle test, and the larger the value, the smoother the value. The contact angle of the ultra-pure material is about 84 degrees, and after fluorine-silicon modification, the contact angle can reach 110 degrees, so that the promotion is larger.
The invention adopts the extensional rheology technology, utilizes the volume compression release effect of the eccentric rotor to strengthen the mass and heat transfer effect in the melting and plasticizing process of the ultra-high molecular weight polyethylene material, shortens the retention time of the material, can smoothly extrude the ultra-high molecular weight polyethylene at high speed and has better molding effect. Meanwhile, the smooth degree of the inner surface of the lining layer is further improved through modification of the fluorine-silicon master batch, so that the friction force between the lining layer and liquid food is reduced, and the condition of adhesion and accumulation of the food is avoided. The hot melt adhesive is prepared by using ultra-high molecular weight polyethylene as a base material. The reinforcing layer is wound by steel wires, so that the pressure resistance of the composite pipe can be improved, and the phenomenon of pipe explosion caused by overlarge pressure in the pipe in the process of conveying liquid food is avoided. The coating layer is made of a polyvinylidene fluoride and ABS resin blending material, wherein the content of the polyvinylidene fluoride is 50% -80%. After the performance advantages of the two raw materials are combined, the water-blocking, air-insulating, stain-resisting and weather-resisting properties of the coating layer are greatly enhanced on the premise of having excellent mechanical properties, and the coating layer is suitable for outdoor liquid food conveying and can meet the long-term use requirement.
The composite material blended by the polyvinylidene fluoride and the ABS resin has high impact resistance, high heat resistance, corrosion resistance and flame retardance, simultaneously blocks water and separates gas, can well meet the outdoor long-term use requirement, and is an ideal outer tube material for conveying liquid food.
The composite pipe has the following characteristics in whole: high impact resistance, high heat resistance, corrosion resistance, scratch resistance, flame retardance, water and gas resistance and the like.
The inner pipe is made of a fluorine-silicon modified ultra-high molecular weight polyethylene material, and has the advantages of impact resistance, wear resistance, chemical corrosion resistance, weather resistance, stress cracking resistance, adhesion resistance, self lubrication and the like.
In the invention, the ultra-high molecular weight polyethylene, the polyvinylidene fluoride and the ABS are used as the materials of the composite pipe, the friction force between the composite pipe and the conveyed liquid is small, the whole composite pipe is water-resistant and gas-resistant, the impact resistance is strong, and the composite pipe is an ideal liquid food conveying pipeline.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. The utility model provides a multi-functional liquid food carries polyethylene composite pipe, includes inner liner, enhancement layer, coating, the inner liner adopts 0.5% -10% fluorine silicon masterbatch modified ultra high molecular weight polyethylene, and its molecular weight is 250 ten thousand, the enhancement layer is including the wire net that the winding formed, the coating is 50% -80% polyvinylidene fluoride and ABS resin blending material.
2. The multi-functional liquid food transport polyethylene composite tube according to claim 1, wherein the composite tube has an outer diameter of 110 mm and an inner diameter of 90 mm.
3. The multi-functional liquid food conveying polyethylene composite pipe according to claim 1, wherein the steel wire mesh is formed by winding one or more pairs of steel wires around each other, and the winding angle is ± 57 °.
4. The multifunctional polyethylene composite pipe for conveying liquid food as claimed in claim 1, wherein the reinforcing layer further comprises a hot melt adhesive for bonding the inner liner layer and the coating layer, the hot melt adhesive is prepared by using ultra-high molecular weight polyethylene and polyvinylidene fluoride as base materials, and the content of polyvinylidene fluoride is 3-10%.
5. The preparation method of the multifunctional liquid food conveying polyethylene composite pipe according to claim 1, characterized by comprising the following steps:
step one, extruding ultra-high molecular weight polyethylene by using a stretching rheological technology to form an inner liner;
extruding high-temperature-resistant hot melt adhesive outside the lining layer;
winding a steel wire mesh outside the hot melt adhesive to form a reinforcing layer;
and step four, extruding the blending material outside the reinforcing layer to form a coating layer.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110198807.0A CN112944056A (en) | 2021-02-22 | 2021-02-22 | Multifunctional polyethylene composite pipe for conveying liquid food and preparation method thereof |
| PCT/CN2021/099263 WO2022174535A1 (en) | 2021-02-22 | 2021-06-10 | Multi-functional polyethylene composite pipe for liquid food delivery and manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110198807.0A CN112944056A (en) | 2021-02-22 | 2021-02-22 | Multifunctional polyethylene composite pipe for conveying liquid food and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112944056A true CN112944056A (en) | 2021-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110198807.0A Pending CN112944056A (en) | 2021-02-22 | 2021-02-22 | Multifunctional polyethylene composite pipe for conveying liquid food and preparation method thereof |
Country Status (2)
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| CN (1) | CN112944056A (en) |
| WO (1) | WO2022174535A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1221086A (en) * | 1998-10-07 | 1999-06-30 | 王庆昭 | Structure and making method for compound reinforced tube waved by super high molecular weight polythene |
| JP2002036431A (en) * | 2000-07-27 | 2002-02-05 | Hitachi Metals Ltd | Metal reinforced polyethylene pipe |
| CN102478130A (en) * | 2010-11-27 | 2012-05-30 | 泰州申视塑料有限公司 | High-pressure-bearing ultrahigh-molecular-weight polyethylene reinforced composite pipe structure |
| CN106854328A (en) * | 2016-12-28 | 2017-06-16 | 山东华夏神舟新材料有限公司 | Injection extrusion molding toughening modifying polyvinylidene fluoride composite material and preparation method |
| CN110466179A (en) * | 2019-07-08 | 2019-11-19 | 浙江伟星新型建材股份有限公司 | A kind of preparation method of ant-scaling enhancing thermoplastic composite tube |
| CN111421932A (en) * | 2020-04-21 | 2020-07-17 | 天津市伟星新型建材有限公司 | Anti-scaling plastic pipe with far infrared radiation function and preparation method thereof |
-
2021
- 2021-02-22 CN CN202110198807.0A patent/CN112944056A/en active Pending
- 2021-06-10 WO PCT/CN2021/099263 patent/WO2022174535A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1221086A (en) * | 1998-10-07 | 1999-06-30 | 王庆昭 | Structure and making method for compound reinforced tube waved by super high molecular weight polythene |
| JP2002036431A (en) * | 2000-07-27 | 2002-02-05 | Hitachi Metals Ltd | Metal reinforced polyethylene pipe |
| CN102478130A (en) * | 2010-11-27 | 2012-05-30 | 泰州申视塑料有限公司 | High-pressure-bearing ultrahigh-molecular-weight polyethylene reinforced composite pipe structure |
| CN106854328A (en) * | 2016-12-28 | 2017-06-16 | 山东华夏神舟新材料有限公司 | Injection extrusion molding toughening modifying polyvinylidene fluoride composite material and preparation method |
| CN110466179A (en) * | 2019-07-08 | 2019-11-19 | 浙江伟星新型建材股份有限公司 | A kind of preparation method of ant-scaling enhancing thermoplastic composite tube |
| CN111421932A (en) * | 2020-04-21 | 2020-07-17 | 天津市伟星新型建材有限公司 | Anti-scaling plastic pipe with far infrared radiation function and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022174535A1 (en) | 2022-08-25 |
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Application publication date: 20210611 |