CN103819798A - Unilateral-stretching geogrid - Google Patents

Unilateral-stretching geogrid Download PDF

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Publication number
CN103819798A
CN103819798A CN201410079527.8A CN201410079527A CN103819798A CN 103819798 A CN103819798 A CN 103819798A CN 201410079527 A CN201410079527 A CN 201410079527A CN 103819798 A CN103819798 A CN 103819798A
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China
Prior art keywords
density polyethylene
geo
unilateral stretching
grid
hdpe
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CN201410079527.8A
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Chinese (zh)
Inventor
贺昶明
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Sichuan Ya Hao Real Estate Co ltd
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Sichuan Ya Hao Real Estate Co ltd
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Publication date
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Priority to CN201410079527.8A priority Critical patent/CN103819798A/en
Publication of CN103819798A publication Critical patent/CN103819798A/en
Pending legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethene
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/005—Soil-conditioning by mixing with fibrous materials, filaments, open mesh or the like
    • 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
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2237—Oxides; Hydroxides of metals of titanium
    • C08K2003/2241—Titanium dioxide
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation
    • 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
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/06—Properties of polyethylene
    • C08L2207/062—HDPE

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Structural Engineering (AREA)
  • Soil Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Artificial Filaments (AREA)

Abstract

The invention discloses a unilateral-stretching geogrid, which comprises the following components in parts by weight: 50-65 parts of high-density polyethylene, 30-45 parts of medium-density polyethylene and 3.5-4.5 parts of an antioxidant. The invention provides the unilateral-stretching geogrid comprising high-density polyethylene, medium-density polyethylene and the antioxidant. The unilateral-stretching geogrid comprising such components is high in strength and good in tensile property, and can solve the original problem that tensile is insufficient.

Description

A kind of unilateral stretching geo-grid
Technical field
The present invention relates to real estate building field, be specifically related to a kind of unilateral stretching geo-grid.
Background technology
Unilateral stretching geo-grid is a kind of high strength geosynthetics, take high density polyethylene(HDPE) (HDPE) as starting material, be pressed into thin plate and rush again regular hole pattern through extruding, then the geo-grid that longitudinal stretching forms, is widely used in the fields such as dykes and dams, tunnel, harbour, highway, railway, building.Unidirectional stretched plastic geogrid is a kind of high strength geosynthetics.Its main application is as follows: 1. strengthen roadbed, can effectively distribute diffusion load, improve stability and the bearing capacity of roadbed, increase the service life; 2. can bear larger repeated load; 3. prevent roadbed material the run off subgrade deformation, the cracking that cause; 4. make the self-supporting ability of banketing after retaining wall improve, reduce the earth pressure of retaining wall, cost saving, increases the service life, and reduces maintenance cost; 5. carry out side slope maintenance in conjunction with spray anchor concrete construction method, not only can save 30%-50% investment, and can the reduction of erection time more than one times; In the roadbed of 6. highway and surface layer, add geo-grid, can reduce flexure, reduce rut, postpone 3-9 times of crack time of occurrences, can reduce Laminate construction thickness and reach 36%; 7. be applicable to various soil, draw materials without strange land, saving of work and time; 8. construction simple and fast, can reduce construction cost greatly.
Because existing unilateral stretching geo-grid is that high density polyethylene(HDPE) is starting material, and although high, the shock-resistant ability of the product intensity made from high density polyethylene(HDPE) is strong, but unit elongation but only has the 10-15% of former sheet material, limit the stretching of unilateral stretching geo-grid, cause the limitation of its application.
Although have the precedent that high density polyethylene(HDPE) and linear polyethylene is cross-linked into unilateral stretching geo-grid, be not and all linear polyethylenes can both be transformed the unilateral stretching geo-grid that obtains high strength high scalability.
Summary of the invention
The invention provides the unilateral stretching geo-grid that a kind of component comprises high density polyethylene(HDPE), medium-density polyethylene and antioxidant, not only intensity is high but also tensile property good for the unilateral stretching geo-grid of this composition, can solve original underdrawn problem.
Object of the present invention reaches by the following technical programs:
A kind of unilateral stretching geo-grid, its component comprises that high density polyethylene(HDPE) weight is 50-65 part, and medium-density polyethylene weight is 30-45 part, and antioxidant weight is 3.5-4.5 part.The performance of medium-density polyethylene between high density polyethylene(HDPE) and Low Density Polyethylene between the two, both kept the rigidity of high density polyethylene(HDPE), there is again flexibility, the creep resistant of Low Density Polyethylene, select both proof strength, flexibility and creep resistants of medium-density polyethylene.
Described high density polyethylene(HDPE) is short-chain branch, and density is 0.960g/cc-0.980g/cc.Described high density polyethylene(HDPE) is short-chain branch, and its density is 0.973g/cc.
Described medium-density polyethylene is short-chain branch, and its density is 0.926-0.935g/cc.
Described medium-density polyethylene is short-chain branch, and its density is 0.932g/cc.
Described antioxidant is the one in nano titanium oxide, carbon black or UV reagent.
Described antioxidant is nano titanium oxide.
Its component also comprises that short-chain fat hydrocarbyl si lanes is as linking agent, and its parts by weight are 0.5-1.0 part.
The present invention compared with prior art, has following advantage and beneficial effect:
1, the present invention adopts high density polyethylene(HDPE) and medium-density polyethylene to be cross-linked, keep the rigidity of high density polyethylene(HDPE), there is again flexibility, the creep resistant of Low Density Polyethylene, select both proof strength, flexibility and creep resistants of medium-density polyethylene, in view of this character of medium-density polyethylene, apply it in unilateral stretching geo-grid, solved the imperfect limitation of high strength creep resistant while only preparation with pure high density polyethylene(HDPE).
2, the present invention also adopts nano titanium oxide as antioxidant, not only can prevent polyethylene oxidative deformation in cross-linking process, can also increase the tensile strength of material, is applicable to the requirement of strength of unilateral stretching geo-grid sheet.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment 1
Unilateral stretching geo-grid, its component comprises that high density polyethylene(HDPE) weight is 50 parts, and medium-density polyethylene weight is 45 parts, and antioxidant weight is 4.5 parts.Its component also comprises that short-chain fat hydrocarbyl si lanes is as linking agent, and its parts by weight are 0.5 part.
High density polyethylene(HDPE) is short-chain branch, and its density is 0.973g/cc.
Medium-density polyethylene is short-chain branch, and its density is 0.932g/cc.
Antioxidant is nano titanium oxide.
Embodiment 2
Unilateral stretching geo-grid, its component comprises that high density polyethylene(HDPE) weight is 65 parts, and medium-density polyethylene weight is 30.5 parts, and antioxidant weight is 3.5 parts.Described high density polyethylene(HDPE) is short-chain branch, and density is 0.960g/cc.
Medium-density polyethylene is short-chain branch, and its density is 0.935g/cc.
Antioxidant is nano titanium oxide.
Its component also comprises that short-chain fat hydrocarbyl si lanes is as linking agent, and its parts by weight are 1.0 parts.
Embodiment 3
Unilateral stretching geo-grid, its component comprises that high density polyethylene(HDPE) weight is 55 parts, and medium-density polyethylene weight is 40 parts, and antioxidant weight is 4.0 parts.Its component also comprises that short-chain fat hydrocarbyl si lanes is as linking agent, and its parts by weight are 1.0 parts.High density polyethylene(HDPE) is short-chain branch, and density is 0.980g/cc.
Medium-density polyethylene is short-chain branch, and its density is 0.926g/cc.
Described antioxidant is carbon black.
Embodiment 4
Unilateral stretching geo-grid, its component comprises that high density polyethylene(HDPE) weight is 65 parts, and medium-density polyethylene weight is 30 parts, and antioxidant weight is 4.5 parts.Its component also comprises that short-chain fat hydrocarbyl si lanes is as linking agent, and its parts by weight are 0.5 part.
High density polyethylene(HDPE) is short-chain branch, and its density is 0.973g/cc.
Described medium-density polyethylene is short-chain branch, and its density is 0.935g/cc.
Described antioxidant is UV reagent.
Above embodiment all adopts the preparation method of conventional unilateral stretching geo-grid to carry out the preparation of the finished product.The finished product unilateral stretching geo-grid obtaining and existing unilateral stretching geo-grid performance perameter are as follows:
? Existing Embodiment 1 Embodiment 2 Embodiment 3 Embodiment 4
Tensile strength Mpa ≧25 ≧24.8 ≧24.4 ≧24.2 ≧24.5
Elongation at break % ≧550 ≧650 ≧645 ≧640 ≧648
From showing, can find out, tensile strength of the present invention and the tensile strength of only making with high density polyethylene(HDPE) are very nearly the same, but elongation at break has but increased, illustrate that the present invention has stronger tensile property, can meet the demand to tensile creep in practical application.

Claims (8)

1. a unilateral stretching geo-grid, is characterized in that: its component comprises that high density polyethylene(HDPE) weight is 50-65 part, and medium-density polyethylene weight is 30-45 part, and antioxidant weight is 3.5-4.5 part.
2. unilateral stretching geo-grid according to claim 1, is characterized in that: described high density polyethylene(HDPE) is short-chain branch, and density is 0.960g/cc-0.980g/cc.
3. unilateral stretching geo-grid according to claim 1, is characterized in that: described high density polyethylene(HDPE) is short-chain branch, and its density is 0.973g/cc.
4. unilateral stretching geo-grid according to claim 1, is characterized in that: described medium-density polyethylene is short-chain branch, and its density is 0.926-0.935g/cc.
5. unilateral stretching geo-grid according to claim 1, is characterized in that: described medium-density polyethylene is short-chain branch, and its density is 0.932g/cc.
6. according to the unilateral stretching geo-grid described in claim 1-5 any one, it is characterized in that: described antioxidant is the one in nano titanium oxide, carbon black or UV reagent.
7. unilateral stretching geo-grid according to claim 6, is characterized in that: described antioxidant is nano titanium oxide.
8. unilateral stretching geo-grid according to claim 7, is characterized in that: its component also comprises that short-chain fat hydrocarbyl si lanes is as linking agent, and its parts by weight are 0.5-1.0 part.
CN201410079527.8A 2014-03-06 2014-03-06 Unilateral-stretching geogrid Pending CN103819798A (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104262760A (en) * 2014-10-24 2015-01-07 安徽杰奥玛克合成材料科技有限公司 Antioxidant geocell master batch
CN104262757A (en) * 2014-10-24 2015-01-07 安徽杰奥玛克合成材料科技有限公司 Cross-linking modified polyethylene geogrid
CN104262756A (en) * 2014-10-24 2015-01-07 安徽杰奥玛克合成材料科技有限公司 Calcium-based geocell master batch
CN104277297A (en) * 2014-10-25 2015-01-14 安徽杰奥玛克合成材料科技有限公司 Corrosion-resistant geogrid and preparation method thereof
CN104277301A (en) * 2014-10-25 2015-01-14 安徽杰奥玛克合成材料科技有限公司 Anti-aging geogrid and preparation method thereof
CN104277298A (en) * 2014-10-25 2015-01-14 安徽杰奥玛克合成材料科技有限公司 Modified geogrid processed by using waste cross-linked polyethylene cable material and preparation method of modified geogrid
CN104292586A (en) * 2014-10-24 2015-01-21 安徽杰奥玛克合成材料科技有限公司 Earthwork standard room master batch suitable for hot and humid areas
CN104311997A (en) * 2014-10-25 2015-01-28 安徽杰奥玛克合成材料科技有限公司 Nano modified high-impact geogrid and preparation method thereof
CN104311958A (en) * 2014-10-25 2015-01-28 安徽杰奥玛克合成材料科技有限公司 Carbon-plastic composite modified geogrid and preparation method thereof
CN104387644A (en) * 2014-10-24 2015-03-04 安徽杰奥玛克合成材料科技有限公司 Geocell master batch containing superfine slag powder
CN106832509A (en) * 2016-12-22 2017-06-13 马鞍山市鑫程纳米新材料科技有限公司 A kind of preparation method of low temperature resistant GSZ

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104262760A (en) * 2014-10-24 2015-01-07 安徽杰奥玛克合成材料科技有限公司 Antioxidant geocell master batch
CN104262757A (en) * 2014-10-24 2015-01-07 安徽杰奥玛克合成材料科技有限公司 Cross-linking modified polyethylene geogrid
CN104262756A (en) * 2014-10-24 2015-01-07 安徽杰奥玛克合成材料科技有限公司 Calcium-based geocell master batch
CN104292586A (en) * 2014-10-24 2015-01-21 安徽杰奥玛克合成材料科技有限公司 Earthwork standard room master batch suitable for hot and humid areas
CN104387644A (en) * 2014-10-24 2015-03-04 安徽杰奥玛克合成材料科技有限公司 Geocell master batch containing superfine slag powder
CN104277297A (en) * 2014-10-25 2015-01-14 安徽杰奥玛克合成材料科技有限公司 Corrosion-resistant geogrid and preparation method thereof
CN104277301A (en) * 2014-10-25 2015-01-14 安徽杰奥玛克合成材料科技有限公司 Anti-aging geogrid and preparation method thereof
CN104277298A (en) * 2014-10-25 2015-01-14 安徽杰奥玛克合成材料科技有限公司 Modified geogrid processed by using waste cross-linked polyethylene cable material and preparation method of modified geogrid
CN104311997A (en) * 2014-10-25 2015-01-28 安徽杰奥玛克合成材料科技有限公司 Nano modified high-impact geogrid and preparation method thereof
CN104311958A (en) * 2014-10-25 2015-01-28 安徽杰奥玛克合成材料科技有限公司 Carbon-plastic composite modified geogrid and preparation method thereof
CN106832509A (en) * 2016-12-22 2017-06-13 马鞍山市鑫程纳米新材料科技有限公司 A kind of preparation method of low temperature resistant GSZ

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Application publication date: 20140528