CN103214717A - High-flexibility geomembrane and preparation method for same - Google Patents
High-flexibility geomembrane and preparation method for same Download PDFInfo
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- CN103214717A CN103214717A CN2013101388645A CN201310138864A CN103214717A CN 103214717 A CN103214717 A CN 103214717A CN 2013101388645 A CN2013101388645 A CN 2013101388645A CN 201310138864 A CN201310138864 A CN 201310138864A CN 103214717 A CN103214717 A CN 103214717A
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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
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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
- B29C2948/92819—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
The high flexibility geomembrane, be usually used in high latitude area to the demanding engineering of anti-cold shortness energy, or be used for non-uniform settling or the big engineering of local sedimentation, as dump leaching field, mine, refuse landfill with other are to impervious material extension property and the demanding engineering of punctured resistance.
Geomembrane is mainly HDPE on the market, LLDPE co-extrusion geomembrane, and the shortcoming of existing HDPE, LLDP geomembrane: 1, coefficient of thermal expansion and contraction is big, it is lax when the face after the construction is warm, tighten influence construction and construction quality, the fixation means of destructible geomembrane when cold; 2, cold shortness: low temperature becomes fragile, and the film when temperature is very low after the construction may occur cracked, causes direct economic loss or engineering to do over again.
Summary of the invention
The purpose of this invention is to provide a kind of high flexibility geomembrane and preparation method thereof, the elongation at break of geomembrane, anti-puncture, cold-check resistance energy, anti-bending performance significantly improve, and security improves in the geomembrane use.
High flexibility geomembrane of the present invention, raw material and weight percent thereof are:
Described HDPE butylene mol ratio 1.8-3.0%, weight-average molecular weight 20-30 ten thousand, molecular weight distribution 18-23, degree of branching 0.20-0.30 relatively.
Described LLDPE butylene mol ratio 2-3%, weight-average molecular weight 10-15 ten thousand, molecular weight distribution 3-5, degree of branching 1.0-2.0 relatively.
Described elastomerics is 6102FL or 1880G, and manufacturer is an Exxon Mobil Corporation.Elastomerics is an important material during the 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 a characteristic master batch company limited.
High flexibility geomembrane of the present invention, this product is a raw material with HDPE, LLDPE and elastomerics, by three-layer co-extruded blowing unit production high flexibility geomembrane.
The preparation process of high flexibility geomembrane of the present invention is as follows:
Above raw material is mixed by the prescription weighing, drops into forcing machine, in forcing machine fusion and mix after, enter triple extrusion die head, extrude from circular die orifice, through air blow account, cooling forms tubular film, again through cutting, flatten, coil into product open.
Raw material mixing time in mixer is 20-40min.
The rotating speed of forcing machine is 20-50 commentaries on classics/min, and each section barrel temperature is 10-220 ℃ in the forcing machine.
The temperature of three-layer co-extruded equipment is 160-210 ℃.
Described three-layer co-extruded equipment, forcing machine length-to-diameter ratio 30-35, die gap is 1.5-3.5mm.Preferred little three layers, little three layers are meant the three-layer co-extruded unit of die diameter below 1 meter, and the film web that little three-layer co-extruded unit is produced is wide less, and conservation is easy to operate.
In extruding the film-blowing process process, record temperature, extruded velocity, pulling speed.
The present invention is except that the performance with general geomembrane, also can adapt to some complex-shaped and needs constructions that be out of shape or ground free settling environment, can satisfy cold district and sedimentation engineering material extension property and anti-puncture, specific demand that the requirement of strength of becoming thin is high.
Compared with prior art, the present invention has following beneficial effect:
1, has high antiseepage coefficient; 2, good chemical stability can anti-strong acid, the corrosion of alkali, salt; 3, very high tension stress intensity makes it have very high tensile strength and can satisfy high standard engineering project needs; 4, very strong weathering resistance has very strong ageing resistance, can expose for a long time to use and keep original performance; 5, very strong tensile strength and elongation at break (reaching more than 800%), the high flexibility geomembrane has high unidirectional and multinomial extension property and flexibility.6, soft, flexible, anti-puncture, cold-check resistance energy and the height of anti-the bending performance, security obviously improves in the geomembrane use.
Embodiment:
The present invention will be further described below in conjunction with embodiment.
Embodiment 1
High flexibility geomembrane of the present invention, raw material and weight percent thereof are:
Wherein, HDPE butylene mol ratio 1.8%, weight-average molecular weight 230,000, molecular weight distribution 18, the degree of branching 0.20 relatively; Described LLDPE butylene mol ratio 2.1%, weight-average molecular weight 110,000, molecular weight distribution 3, the degree of branching 1.0 relatively.
The preparation method of high flexibility geomembrane of the present invention is as follows:
Above raw material is pressed the prescription weighing, in mixer, mix 30min under the room temperature, raw material behind the thorough mixing is sent into the forcing machine opening for feed through Material sucking machine, forcing machine rotating speed 50min/ changes, and each section barrel temperature is 180 ℃ in the forcing machine, in forcing machine fusion and mix after, enter 200 ℃ of triple extrusion die heads of temperature, extrude from annular die, blow account, cooling formation tubular film through air, again through cutting, flatten, coil into product open.
Described three-layer co-extruded equipment, forcing machine length-to-diameter ratio 30, die gap are 2.0mm, in extruding the film-blowing process process, record temperature, extruded velocity, pulling speed.
Performance to the high flexibility geomembrane detects, detected result such 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 stroke) | N/mm | 24/27.5 |
| Breaking tenacity, (vertical/horizontal stroke) | N/mm | 35/39 |
| The elongation at yield rate, (vertical/horizontal stroke) | % | 21.5/23 |
| Elongation at break, (vertical/horizontal stroke) | % | 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 butylene mol ratio 2.5%, weight-average molecular weight 280,000, molecular weight distribution 21, the degree of branching 0.24 relatively; Described LLDPE butylene mol ratio 2.7%, weight-average molecular weight 110,000, molecular weight distribution 4, the degree of branching 1.4 relatively.
The preparation method of high flexibility geomembrane of the present invention is as follows:
Above raw material is pressed the prescription weighing, in mixer, mix 40min under the room temperature, raw material behind the thorough mixing is sent into the forcing machine opening for feed through Material sucking machine, extruder screw rotating speed 20min/ changes, and each section barrel temperature is 140 ℃ in the forcing machine, in forcing machine fusion and mix after, enter 210 ℃ of triple extrusion die heads of temperature, extrude from annular die, blow account, cooling formation tubular film through air, again through cutting, flatten, coil into product open.
Described three-layer co-extruded equipment, forcing machine length-to-diameter ratio 32, die gap are 3.5mm, in extruding the film-blowing process process, record temperature, extruded velocity, pulling speed.
Performance to the high flexibility geomembrane detects, detected result such 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 stroke) | N/mm | 21/23 |
| Breaking tenacity, (vertical/horizontal stroke) | N/mm | 32/33.5 |
| The elongation at yield rate, (vertical/horizontal stroke) | % | 16.9/18 |
| Elongation at break, (vertical/horizontal stroke) | % | 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 butylene mol ratio 3%, weight-average molecular weight 300,000, molecular weight distribution 23, the degree of branching 0.3 relatively; Described LLDPE butylene mol ratio 3%, weight-average molecular weight 150,000, molecular weight distribution 5, the degree of branching 1.8 relatively.
The preparation method of high flexibility geomembrane of the present invention is as follows:
Above raw material is pressed the prescription weighing, in mixer, mix 20min under the room temperature, raw material behind the thorough mixing is sent into the forcing machine opening for feed through Material sucking machine, extruder screw rotating speed 30min/ changes, and each section barrel temperature is 220 ℃ in the forcing machine, in forcing machine fusion and mix after, enter 160 ℃ of triple extrusion die heads of temperature, extrude from annular die, blow account, cooling formation tubular film through air, again through cutting, flatten, coil into product open.
Described three-layer co-extruded equipment, forcing machine length-to-diameter ratio 32, die gap are 2mm, in extruding the film-blowing process process, record temperature, extruded velocity, pulling speed.
Performance to the high flexibility geomembrane detects, detected result such 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 stroke) | N/mm | 19.8/21 |
| Breaking tenacity, (vertical/horizontal stroke) | N/mm | 31.5 |
| The elongation at yield rate, (vertical/horizontal stroke) | % | 17.5/19 |
| Elongation at break, (vertical/horizontal stroke) | % | 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 butylene mol ratio 2.1%, weight-average molecular weight 230,000, molecular weight distribution 21, the degree of branching 0.24 relatively; Described LLDPE butylene mol ratio 2.7%, weight-average molecular weight 110,000, molecular weight distribution 4, the degree of branching 1.4 relatively.
The preparation method of high flexibility geomembrane of the present invention is as follows:
Above raw material is pressed the prescription weighing, in mixer, mix 35min under the room temperature, raw material behind the thorough mixing is sent into the forcing machine opening for feed through Material sucking machine, extruder screw rotating speed 40min/ changes, and each section barrel temperature is 160 ℃ in the forcing machine, in forcing machine fusion and mix after, enter 180 ℃ of triple extrusion die heads of temperature, extrude from annular die, blow account, cooling formation tubular film through air, again through cutting, flatten, coil into product open.
Described three-layer co-extruded equipment, forcing machine length-to-diameter ratio 35, die gap are 1.5mm, in extruding the film-blowing process process, record temperature, extruded velocity, pulling speed.
Performance to the high flexibility geomembrane detects, detected result such 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 stroke) | N/mm | 20.5/22.5 |
| Breaking tenacity, (vertical/horizontal stroke) | N/mm | 31.5 |
| The elongation at yield rate, (vertical/horizontal stroke) | % | 17.5/19 |
| Elongation at break, (vertical/horizontal stroke) | % | 835/867 |
| Angle tear strength N | N | 141 |
| Puncture intensity N | N | 375 |
Claims (10)
1. a high flexibility geomembrane is characterized in that, raw material and weight percent thereof are:
2. high flexibility geomembrane according to claim 1 is characterized in that, described HDPE butylene mol ratio is 1.8-3.0%, and weight-average molecular weight is 20-30 ten thousand, molecular weight distribution 18-23, degree of branching 0.20-0.30 relatively.
3. high flexibility geomembrane according to claim 1 is characterized in that, described LLDPE butylene mol ratio is 2-3%, and weight-average molecular weight is 10-15 ten thousand, and molecular weight distribution is 3-5, and the degree of branching is 1.0-2.0 relatively.
4. high flexibility geomembrane according to claim 1 is characterized in that, described elastomerics is 6102FL or 1880G; Black masterbatch is K9801.
5. the preparation method of the described high flexibility geomembrane of claim 1 is characterized in that preparation process is as follows:
Above raw material is mixed by the prescription weighing, drops into forcing machine, in forcing machine fusion and mix after, enter triple extrusion die head, extrude from circular die orifice, through air blow account, cooling forms tubular film, again through cutting, flatten, coil into product open.
6. the preparation method of high flexibility geomembrane according to claim 5 is characterized in that, raw material mixing time in mixer is 20-40min.
7. the preparation method of high flexibility geomembrane according to claim 5 is characterized in that, the rotating speed of forcing machine is 20-50 commentaries on classics/min, and each section barrel temperature is 10-220 ℃ in the forcing machine.
8. the preparation method of high flexibility geomembrane according to claim 5 is characterized in that, the temperature of three-layer co-extruded equipment is 160-210 ℃.
9. the preparation method of high flexibility geomembrane according to claim 5 is characterized in that, described three-layer co-extruded equipment, and forcing machine length-to-diameter ratio 30-35, die gap is 1.5-3.5mm.
10. the preparation method of high flexibility geomembrane according to claim 5 is characterized in that, in extruding the film-blowing process process, and record temperature, extruded velocity, pulling speed.
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| CN201310138864.5A CN103214717B (en) | 2013-04-19 | 2013-04-19 | High-flexibility geomembrane and preparation method for same |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104558743A (en) * | 2013-10-17 | 2015-04-29 | 中国石油化工股份有限公司 | Polyethylene geomembrane 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 |
| 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 |
| 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 |
| 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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| CN101525452A (en) * | 2009-03-03 | 2009-09-09 | 山东天鹤塑胶股份有限公司 | Metallocene geomembrane |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104558743A (en) * | 2013-10-17 | 2015-04-29 | 中国石油化工股份有限公司 | Polyethylene geomembrane and preparation method thereof |
| 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 |
| 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 |
| 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 |
| 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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