CN103214717B - High-flexibility geomembrane and preparation method for same - Google Patents
High-flexibility geomembrane and preparation method for same Download PDFInfo
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- CN103214717B CN103214717B CN201310138864.5A CN201310138864A CN103214717B CN 103214717 B CN103214717 B CN 103214717B CN 201310138864 A CN201310138864 A CN 201310138864A CN 103214717 B CN103214717 B CN 103214717B
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- geomembrane
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92895—Barrel or housing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
The invention relates to a high-flexibility geomembrane and a preparation method for the same. The high-flexibility geomembrane comprises the following raw materials in percentage by weight: 20-60% of HDPE (high density polyethylene), 10-55% of LLDPE (linear low density polyethylene), 20-65% of elastomer, and 5-10% of carbon black master batch, wherein the total percentage of the raw materials is 100. The preparation method comprises the following steps of: weighing and uniformly mixing the raw materials aforementioned according to a formula; pouring the raw materials in an extruder, and melting and uniformly mixing in the extruder; conveying the raw materials in a three-layer co-extrusion extruder, and extruding from a circular die orifice; blowing up via air, and cooling to form a tubular membrane; and splitting, flattening and rolling to obtain the product. The high-flexibility geomembrane disclosed by the invention is greatly improved in elongation at break, puncture resistance, cold brittleness resistance and bending resistance; and the geomembrane is improved in safety during a use process.
Description
Technical field
The present invention relates to a kind of high flexibility geomembrane and preparation method thereof.
Background technology
High flexibility geomembrane, be usually used in high latitude area and can require high engineering to anti-cold shortness, or for non-uniform settling or the large engineering of local sedimentation, as dump leaching field, mine, refuse landfill and other high engineering is required to impervious material extension property and punctured resistance.
On market, geomembrane is mainly HDPE, LLDPE co-extrusion geomembrane, the shortcoming of existing HDPE, LLDP geomembrane: 1, coefficient of thermal expansion and contraction is large, it is lax when face after construction is warm, tighten time cold, impact construction and construction quality, the fixation means of destructible geomembrane; 2, cold shortness: low temperature becomes fragile, film when temperature is very low after construction may occur cracked, causes direct economic loss or engineering to do over again.
Summary of the invention
The object of this invention is to provide a kind of high flexibility geomembrane and preparation method thereof, the elongation at break of geomembrane, puncture resistant, cold-check resistance energy, resistance to bending performance significantly improve, and in geomembrane use procedure, security improves.
High flexibility geomembrane of the present invention, raw material and weight percent thereof are:
Described HDPE butene molar ratio 1.8-3.0%, weight-average molecular weight 20-30 ten thousand, molecular weight distribution 18-23, relative degree of branching 0.20-0.30.
Described LLDPE butene molar ratio 2-3%, weight-average molecular weight 10-15 ten thousand, molecular weight distribution 3-5, relative degree of branching 1.0-2.0.
Described elastomerics is 6102FL or 1880G, and manufacturer is Exxon Mobil Corporation.Elastomerics is raw material important during high flexibility geomembrane is produced, and can increase the snappiness of product, improves the elongation at break of product.
Described black masterbatch is K9801, and manufacturer is Shandong card one hundred characteristic master batch company limited.
High flexibility geomembrane of the present invention, this product with HDPE, LLDPE and elastomerics for raw material, by three-layer co-extruded Blown-film line production high flexibility geomembrane.
The preparation process of high flexibility geomembrane of the present invention is as follows:
Above raw material is mixed by formula weighing, drops into forcing machine, in an extruder melting after mixing, enter triple extrusion die head, extrude from circular die orifice, blow account through air, cooling forms tubular film, then through cutting open, flattening, coil into product.
Raw material mixing time in mixer is 20-40min.
The rotating speed of forcing machine is that 20-50 turns/min, and in forcing machine, each section of barrel temperature is 10-220 DEG C.
The temperature of three-layer co-extruded equipment is 160-210 DEG C.
Described three-layer co-extruded equipment, forcing machine length-to-diameter ratio 30-35, die gap is 1.5-3.5mm.Preferably little three layers, little three layers of three-layer co-extruded unit referring to die diameter less than 1 meter, the film web that little three-layer co-extruded unit is produced is wide less, and conservation is easy to operate.
Extruding in film-blowing process process, record temperature, extruded velocity, pulling speed.
The present invention is except having the performance of general geomembrane, also can adapt to some complex-shaped and needs and carry out construction that is that be out of shape or ground free settling environment, cold district and sedimentation engineering can be met to material ductility energy and puncture resistant, specific demand that requirement of strength of becoming thin is high.
Compared with prior art, the present invention has following beneficial effect:
1, there is high antiseepage coefficient; 2, good chemical stability, the corrosion of the anti-strong acid of energy, alkali, salt; 3, very high tension stress intensity, makes it have very high tensile strength and can meet high standard engineering project needs; 4, very strong weathering resistance, has very strong ageing resistance, can long-time exposed use and keep original performance; 5, very strong tensile strength and elongation at break (reaching more than 800%), high flexibility geomembrane has high unidirectional and multinomial extension property and flexibility.6, soft, flexible, puncture resistant, cold-check resistance energy and resistance to bending performance are high, in geomembrane use procedure, security obviously improves.
Embodiment:
Below in conjunction with embodiment, the present invention will be further described.
Embodiment 1
High flexibility geomembrane of the present invention, raw material and weight percent thereof are:
Wherein, HDPE butene molar ratio 1.8%, weight-average molecular weight 230,000, molecular weight distribution 18, the relative degree of branching 0.20; Described LLDPE butene molar ratio 2.1%, weight-average molecular weight 110,000, molecular weight distribution 3, the relative degree of branching 1.0.
The preparation method of high flexibility geomembrane of the present invention is as follows:
Above raw material is weighed by formula, in mixer, 30min is mixed under room temperature, abundant mixed raw material sends into forcing machine opening for feed through Material sucking machine, forcing machine rotating speed 50min/ turns, each section of barrel temperature 180 DEG C in forcing machine, in an extruder melting after mixing, enter temperature 200 DEG C of triple extrusion die heads, extrude from annular die, blow account through air, cooling forms tubular film, then through cutting open, flattening, coil into product.
Described three-layer co-extruded equipment, forcing machine length-to-diameter ratio 30, die gap is 2.0mm, is extruding in film-blowing process process, record temperature, extruded velocity, pulling speed.
Detect the performance of high flexibility geomembrane, detected result is as table 1.
The performance test results of table 1 high flexibility geomembrane
| Test event | Unit | Measured result (thickness 1.0mm) |
| Yield strength, (vertical/horizontal) | N/mm | 24/27.5 |
| Breaking tenacity, (vertical/horizontal) | N/mm | 35/39 |
| Elongation at yield rate, (vertical/horizontal) | % | 21.5/23 |
| Elongation at break, (vertical/horizontal) | % | 886/920 |
| Angle tear strength, N | N | 152 |
| Puncture intensity, N | N | 426 |
Embodiment 2
High flexibility geomembrane of the present invention, raw material and weight percent thereof are:
Wherein, HDPE butene molar ratio 2.5%, weight-average molecular weight 280,000, molecular weight distribution 21, the relative degree of branching 0.24; Described LLDPE butene molar ratio 2.7%, weight-average molecular weight 110,000, molecular weight distribution 4, the relative degree of branching 1.4.
The preparation method of high flexibility geomembrane of the present invention is as follows:
Above raw material is weighed by formula, in mixer, 40min is mixed under room temperature, abundant mixed raw material sends into forcing machine opening for feed through Material sucking machine, extruder screw rotating speed 20min/ turns, each section of barrel temperature 140 DEG C in forcing machine, in an extruder melting after mixing, enter temperature 210 DEG C of triple extrusion die heads, extrude from annular die, blow account through air, cooling forms tubular film, then through cutting open, flattening, coil into product.
Described three-layer co-extruded equipment, forcing machine length-to-diameter ratio 32, die gap is 3.5mm, is extruding in film-blowing process process, record temperature, extruded velocity, pulling speed.
Detect the performance of high flexibility geomembrane, detected result is as table 2.
The performance test results of table 2 high flexibility geomembrane
| Test event | Unit | Measured result (thickness 1.0mm) |
| Yield strength, (vertical/horizontal) | N/mm | 21/23 |
| Breaking tenacity, (vertical/horizontal) | N/mm | 32/33.5 |
| Elongation at yield rate, (vertical/horizontal) | % | 16.9/18 |
| Elongation at break, (vertical/horizontal) | % | 820/856 |
| Angle tear strength, N | N | 143 |
| Puncture intensity, N | N | 372 |
Embodiment 3
High flexibility geomembrane of the present invention, raw material and weight percent thereof are:
Wherein, HDPE butene molar ratio 3%, weight-average molecular weight 300,000, molecular weight distribution 23, the relative degree of branching 0.3; Described LLDPE butene molar ratio 3%, weight-average molecular weight 150,000, molecular weight distribution 5, the relative degree of branching 1.8.
The preparation method of high flexibility geomembrane of the present invention is as follows:
Above raw material is weighed by formula, in mixer, 20min is mixed under room temperature, abundant mixed raw material sends into forcing machine opening for feed through Material sucking machine, extruder screw rotating speed 30min/ turns, each section of barrel temperature 220 DEG C in forcing machine, in an extruder melting after mixing, enter temperature 160 DEG C of triple extrusion die heads, extrude from annular die, blow account through air, cooling forms tubular film, then through cutting open, flattening, coil into product.
Described three-layer co-extruded equipment, forcing machine length-to-diameter ratio 32, die gap is 2mm, is extruding in film-blowing process process, record temperature, extruded velocity, pulling speed.
Detect the performance of high flexibility geomembrane, detected result is as table 3.
The performance test results of table 3 high flexibility geomembrane
| Test event | Unit | Measured result (thickness 1.0mm) |
| Yield strength, (vertical/horizontal) | N/mm | 19.8/21 |
| Breaking tenacity, (vertical/horizontal) | N/mm | 31.5 |
| Elongation at yield rate, (vertical/horizontal) | % | 17.5/19 |
| Elongation at break, (vertical/horizontal) | % | 765/792 |
| Angle tear strength, N | N | 136 |
| Puncture intensity, N | N | 368 |
Embodiment 4
High flexibility geomembrane of the present invention, raw material and weight percent thereof are:
Wherein, HDPE butene molar ratio 2.1%, weight-average molecular weight 230,000, molecular weight distribution 21, the relative degree of branching 0.24; Described LLDPE butene molar ratio 2.7%, weight-average molecular weight 110,000, molecular weight distribution 4, the relative degree of branching 1.4.
The preparation method of high flexibility geomembrane of the present invention is as follows:
Above raw material is weighed by formula, in mixer, 35min is mixed under room temperature, abundant mixed raw material sends into forcing machine opening for feed through Material sucking machine, extruder screw rotating speed 40min/ turns, each section of barrel temperature 160 DEG C in forcing machine, in an extruder melting after mixing, enter temperature 180 DEG C of triple extrusion die heads, extrude from annular die, blow account through air, cooling forms tubular film, then through cutting open, flattening, coil into product.
Described three-layer co-extruded equipment, forcing machine length-to-diameter ratio 35, die gap is 1.5mm, is extruding in film-blowing process process, record temperature, extruded velocity, pulling speed.
Detect the performance of high flexibility geomembrane, detected result is as table 4.
The performance test results of table 4 high flexibility geomembrane
| Test event | Unit | Measured result (thickness 1.0mm) |
| Yield strength, (vertical/horizontal) | N/mm | 20.5/22.5 |
| Breaking tenacity, (vertical/horizontal) | N/mm | 31.5 |
| Elongation at yield rate, (vertical/horizontal) | % | 17.5/19 |
| Elongation at break, (vertical/horizontal) | % | 835/867 |
| Angle tear strength N | N | 141 |
| Puncture intensity N | N | 375 |
Claims (7)
1. a high flexibility geomembrane, is characterized in that, raw material and weight percent thereof are:
HDPE 20-60；
LLDPE 10-55；
Elastomerics 20-65;
Black masterbatch 5-10;
Raw material 100 parts altogether;
Described HDPE butene molar ratio is 1.8-3.0%, and weight-average molecular weight is 20-30 ten thousand, molecular weight distribution 18-23, relative degree of branching 0.20-0.30;
Described LLDPE butene molar ratio is 2-3%, and weight-average molecular weight is 10-15 ten thousand, and molecular weight distribution is 3-5, and the relative degree of branching is 1. 0-2.0;
Described elastomerics is 6102FL or 1880G; Black masterbatch is K9801.
2. a preparation method for high flexibility geomembrane according to claim 1, it is characterized in that, preparation process is as follows:
Above raw material is mixed by formula weighing, drops into forcing machine, in an extruder melting after mixing, enter triple extrusion die head, extrude from circular die orifice, form tubular film through air inflation, cooling, then through cutting open, flattening, coil into product.
3. the preparation method of high flexibility geomembrane according to claim 2, is characterized in that, raw material mixing time in mixer is 20-40min.
4. the preparation method of high flexibility geomembrane according to claim 2, is characterized in that, the rotating speed of forcing machine is that 20-50 turns/min, and in forcing machine, each section of barrel temperature is 140-220 DEG C.
5. the preparation method of high flexibility geomembrane according to claim 2, is characterized in that, the temperature of three-layer co-extruded equipment is 160-210 DEG C.
6. the preparation method of high flexibility geomembrane according to claim 2, is characterized in that, described three-layer co-extruded equipment, forcing machine length-to-diameter ratio 30-35, and die gap is 1.5-3.5mm.
7. the preparation method of high flexibility geomembrane according to claim 2, is characterized in that, is extruding in film-blowing process process, record temperature, extruded velocity, pulling speed.
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| CN103214717B true CN103214717B (en) | 2015-04-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104558743B (en) * | 2013-10-17 | 2018-05-11 | 中国石油化工股份有限公司 | A kind of polyethylene film for earthwork and preparation method thereof |
| CN105482223A (en) * | 2015-12-16 | 2016-04-13 | 湖北蓝盾之星科技有限公司 | High-strength high-elongation and high-density polyethylene geomembrane and preparation method thereof |
| CN107323009A (en) * | 2017-07-06 | 2017-11-07 | 中国电建集团华东勘测设计研究院有限公司 | A kind of many membranous type composite geo-membranes of many cloth of high permeability resistance and preparation method thereof |
| CN107323042A (en) * | 2017-07-06 | 2017-11-07 | 中国电建集团华东勘测设计研究院有限公司 | A kind of composite geo-membrane of built-in grid type nylon straps and preparation method thereof |
| CN107815138A (en) * | 2017-11-17 | 2018-03-20 | 江门市蓬江区华龙包装材料有限公司 | A kind of high resiliency highly-flexible PE films |
| CN111117034A (en) * | 2019-12-26 | 2020-05-08 | 山东天海新材料工程有限公司 | Flexible geomembrane and preparation method thereof |
| CN111234364A (en) * | 2020-03-27 | 2020-06-05 | 山东天海新材料工程有限公司 | High-toughness tensile-resistant geomembrane and preparation method thereof |
| CN112356417A (en) * | 2020-12-05 | 2021-02-12 | 宏祥新材料股份有限公司 | Production process of five-layer co-extrusion blow molding polyethylene geomembrane |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101525452A (en) * | 2009-03-03 | 2009-09-09 | 山东天鹤塑胶股份有限公司 | Metallocene geomembrane |
| CN102708615A (en) * | 2012-05-21 | 2012-10-03 | 苍南县龙港康亿电子有限公司 | Worn coin exchange instrument |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101525452A (en) * | 2009-03-03 | 2009-09-09 | 山东天鹤塑胶股份有限公司 | Metallocene geomembrane |
| CN102708615A (en) * | 2012-05-21 | 2012-10-03 | 苍南县龙港康亿电子有限公司 | Worn coin exchange instrument |
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Address after: 255400 No. 2, South Road, Linzi District, Shandong, Zibo Patentee after: Shandong new Tianhe Plastic Co.,Ltd. Address before: 255400 No. 2, South Road, Linzi District, Shandong, Zibo Patentee before: SHANDONG TIANHE PLASTIC Co.,Ltd. |
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Granted publication date: 20150415 |