GB2266540A - A process for forming a grid of polymeric material. - Google Patents
A process for forming a grid of polymeric material. Download PDFInfo
- Publication number
- GB2266540A GB2266540A GB9208827A GB9208827A GB2266540A GB 2266540 A GB2266540 A GB 2266540A GB 9208827 A GB9208827 A GB 9208827A GB 9208827 A GB9208827 A GB 9208827A GB 2266540 A GB2266540 A GB 2266540A
- Authority
- GB
- United Kingdom
- Prior art keywords
- strips
- polymeric material
- process according
- grid
- stretched
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000000463 material Substances 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims description 26
- 229920000642 polymer Polymers 0.000 claims abstract description 27
- -1 polyethylene Polymers 0.000 claims abstract description 15
- 238000000465 moulding Methods 0.000 claims abstract description 9
- 239000004698 Polyethylene Substances 0.000 claims abstract description 6
- 229920000573 polyethylene Polymers 0.000 claims abstract description 6
- 239000004743 Polypropylene Substances 0.000 claims abstract description 5
- 230000004927 fusion Effects 0.000 claims abstract description 5
- 229920000728 polyester Polymers 0.000 claims abstract description 5
- 229920001155 polypropylene Polymers 0.000 claims abstract description 5
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 4
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 4
- 229920000098 polyolefin Polymers 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 2
- 238000004026 adhesive bonding Methods 0.000 abstract description 3
- 239000004746 geotextile Substances 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 239000004927 clay Substances 0.000 description 5
- 239000002689 soil Substances 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000004080 punching Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000345998 Calamus manan Species 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 235000012950 rattan cane Nutrition 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/005—Synthetic yarns or filaments
- D04H3/007—Addition polymers
-
- 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
- B29D28/00—Producing nets or the like, e.g. meshes, lattices
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/005—Synthetic yarns or filaments
- D04H3/009—Condensation or reaction polymers
- D04H3/011—Polyesters
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
- D04H3/04—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments in rectilinear paths, e.g. crossing at right angles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2033/00—Use of polymers of unsaturated acids or derivatives thereof as moulding material
- B29K2033/04—Polymers of esters
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
A polymeric pre-stretched grid eg for geotextile applications is made by moulding this strips of polymeric material, e.g. polyethylene, those strips are fully stretched by a pre-stretching machine so as to rearrange long keys of polymer molecules thereof to give the strips high tensile strength, then these pre-stretched strips are crossed over each other longitudinally and transversely to the required width and the crossings of the longitudinal and transverse strips are bonded by gluing or hot fusion or otherwise to form a pre-stretched grid. Polypropylene and polyester are other suitable materials.
Description
TITLE
A Process for Forming a Grid of Polvmeric Material
The present invention relates to a process for forming a grid of polymeric material. Such grids are usefully applied to sites in need of water and soil protection such as slopes, retaining walls, protecting walls, protecting banks, breakwaters and wharves.
More than 3,000 years ago pre-stretched earth and clay materials making use of a tensile irember were know and materials such as reed and rattan were applied to many large scale earthworks to reinforce clay, brick and granular soil.
In 1953 a French civil engineer Henri Vidal developed a modern process for producing pre-stretched earthwork using linear pre-stretched strips and high tensile strength by taking advantage of selected granular soil as deterrmined by his dynamic analysis. The basic concept of producing prestretched earth and clay materials was derived from the realisation that the friction force generated from the mutual action - contact face - of both materials, i. e. the soil in pre-stretched earth and the pre-stretched material1 can resist the relative movement of these two materials.
Thus, the pre-stretched material can prevent the prestretched earth material from being laterally deformed and provide it with a so-called apparent anisotropic cohesion which is proportional to the soil density and the tensile strength of the pre-stretched material. Based on the foregoing principle, the pre-stretched material applied to the filled earth may be in the shape of a plate, grid, network, tube, rope, bar, rod, chain, etc. So far as the nature of the material is concerned, regardless of whether it is an alloy, copper, galvanised carbon steel, stainless steel, reinforced glass fibre, polymer, wood or other material, if it is characterised by suitable tensile strength, friction resistance against the earth or clay material will be achieved, providing considerable durability and economy.
A previously proposed pre-stretched grid of polymeric material is a network polymer with high strength for application to a pre-stretched earth or clay material. The said polymer generally used will be a strong engineering material made from processing specially selected polyolefins and polyesters and particularly suitable for the purpose of long-range pre-stretching without any adverse chemical reaction.
A conventional polymer pre-stretched grid production has to use considerably complex equipment and a prior process is shown as follows: (1) To feed polyethylene (or polypropylene or polyethylene terephthalate or other suitable polymeric material) into a moulding machine for automatic moulding to make a thin polymer sheet; (2) to feed the thin polymer sheet into a punching machine for evenly punching to form a thin polymer network sheet;; (3) to feed the punched thin polymer network sheet into a sectional pre-stretching machine for longitudinally stretching each lateral row of holes one by one (when stretching, normally the thin polymer network sheet is suitably heated and softened and then stretched in a specific proportion and cooled with cold water or other cooling medium) so as to rearrange the long chains of polymer molecules and provide longitudinally stretched network plies with a considerably high tensile strength and form a one-way pre-stretched grid as show schematically in
Figure 1 of the accompanying drawings;; (4) to feed the one-way pre-stretched grid into another sectional pre-stretching machine for transversely stretching each lateral row of holes one by one so as to provide transversely stretched network plies with a high tensile strength and to form the two-way pre-stretched grid as shown schematically in Figure 2 of the accompanying drawings.
The tensile strength of a typical polymer varies with the length of polymerised carbon chain as shown schematically in Figure 3 of the accompanying drawings; the more carbon key atoms of polymer, the stronger the tensile strength thereof. The polymer appears as if all are rectangular keys in the drawings but in fact there is a certain angle between two adjoining carbon keys, so such polymer will have an extremely high stretching magnitude when subject to tension.
In producing a conventional polymer pre-stretched grid it is intended to eliminate the said angle of carbon keys, and through the effect of directional disposition, the tensile strength of polymer is considerably stepped up, and the yielding strength of polymer products achievable is between 20k - 50k psi which is almost the same as that of mild steel of which the yielding strength is 30k - 38k psi.
The foregoing conventional polymer pre-stretched grid is produced by punching a thin polymer sheet moulded by a moulding machine and then stretching each lateral row of holes one by one to form a square or rectangular grid, so as to rearrange the keys of polymer molecules. The process of stretching each lateral row of holes one by one to form the grid is rather complex and slow, and so far as the stretching of grid network plies is concerned, as shown schematically in Figure 4 of the accompanying drawings, the crossings of longitudinal and transverse network plies and parts of the front and rear network plies are not stretched or not fully stretched, namely, there is a certain angle between adjoining carbon keys of polymer in the position of the said network plies which will still have a very high stretching magnitude when subject to tension, so the unstretched and not fully stretched parts of said front and rear network plies result in a waste of polymer material.
Next, since the conventional polymeric pre-stretched grid is produced by punching and stretching the thin polymer sheet automatically moulded by machine, the width thereof is limited by the width of machine (less than 6 feet normally), so when there is a need to lay same on a construction site, 10 to 30era sides of adjoining two sheets have to be mutually overlapped, it is wasteful not only in material but also in manpower.
According to this invention there is provided a process for forming a grid of polymeric material comprising moulding a polymeric material to form relatively thin strips, stretching the strips to the required extent to rearrange the polymer molecules to form long keys resulting in strips with high tensile strength and forming a grid by bonding together longitudinally and transversely disposed or otherwise angularly disposed said strips.
Preferably the polymeric material comprises a polyolefin, e.g. polyethylene or polypropylene, or a polyester, e.g. polyethylene terephthalate. The bonding may be carried out by adhesive or by hot fusion.
Conveniently the strips are formed by extrusion.
Thus, the present invention offers a process for producing a polymeric pre-stretched grid wherein a suitable polymeric material may be automatically extruded into strips by a machine, these strips may be automatically stretched to form pre-stretched strips by a machine and may then be crossed longitudinally and transversely or otherwise angularly crossed and combined by gluing or hot fusion or other suitable process to form a pre-stretched grid whose width does not need to be limited, thereby simplifying the process, saving material and lowering the manufacturing cost.
A process for producing a grid of polymeric material illustrative of the present invention will be described as follows: (1) Polyethylene is fed into a moulding machine for automatic moulding to make the thin polymer strips.
(2) The thin polymeric strips are fully and automatically stretched by a pre-stretching machine so as to rearrange the long keys of polymer molecules and form pre-stretched strips with high tensile strength.
(3) The pre-stretched strips are longitudinally and transversely crossed in line with a pre-set width thereof by a machine (or by hand if no machine is available) and the crossings of longitudinal and transverse network plies are combined by gluing or hot fusion to form the pre-stretched grid.
The pre-stretched grid so produced results in a product with a high tensile strength since each longitudinal and transverse network ply has been fully stretched, and it is characterised by the avoidance of neither fully stretching a certain one-way network ply nor forming a dead space of stretching network plies at the longitudinal and transverse crossings of said plies or wasting the material in the unstretched part at the said crossings.
The pre-stretched grid made as above is further characterised by the manufactured and processed width thereof not being limited by the length of machine and capable of meeting the dimensions required by the construction site or being much wider so as to save material and cost.
The pre-stretched grid made as above is still further characterised by evenly stretching the whole network plies by machine, simple manufacturing process and even and reliable quality.
The most prominent advantage of the grid made as above consists in producing the pre-stretched grid with same tensile strength because all the pre-stretched strips thereof have been fully stretched, and in comparison with the conventional polymeric pre-stretched grid wherein the material is wasted in the unstretched part at the crossings of longitudinal and transverse network plies1 approximately one third of the material may be saved.
Claims (6)
1. A process for forming a grid of polymeric material comprising moulding a polymeric material to form relatively thin strips, stretching the strips to the required extent to rearrange the polymer molecules to form long keys resulting in strips with high tensile strength and forming a grid by bonding together longitudinally and transversely disposed or otherwise angularly disposed said strips.
2. A process according to Claim 1, wherein the polymeric material comprises a polyolefin.
3. A process according to Claim 2, wherein the polymeric material comprises polyethylene or polypropylene.
4. A process according to Claim 1, wherein the polymeric material comprises a polyester.
5. A process according to Claim 4, wherein the polymeric material comprises polyethylene terephthalate.
6. A process according to any preceding claim, wherein the bonding is carried out using adhesive.
6. A process according to any preceding claim, wherein the bonding is carried out using adhesive.
7. A process according to any one of Claims 1 to 5, wherein the bonding is carried out by hot fusion.
8. A process according to any preceding claim, wherein the strips are formed by extrusion.
9. A process according to Claim 1 substantially as herein described and exemplified.
Amendments to the claims have been filed as follows 1. A process for forming a grid of polymeric material comprising moulding a polymeric material to form relatively thin strips, stretching the strips to the required extent to rearrange the polymer molecules to form long bonds resulting in strips with high tensile strength and forming a grid by bonding together longitudinally and transversely disposed or otherwise angularly disposed said strips.
2. A process according to Claim 1, wherein the polymeric material comprises a polyolefin.
3. A process according to Claim 2, wherein the polymeric material comprises polyethylene or polypropylene.
4. A process according to Claim 1, wherein the polymeric material comprises a polyester.
5. A process according to Claim 4, wherein the polymeric material comprises polyethylene terephthalate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9208827A GB2266540A (en) | 1992-04-23 | 1992-04-23 | A process for forming a grid of polymeric material. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9208827A GB2266540A (en) | 1992-04-23 | 1992-04-23 | A process for forming a grid of polymeric material. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9208827D0 GB9208827D0 (en) | 1992-06-10 |
| GB2266540A true GB2266540A (en) | 1993-11-03 |
Family
ID=10714460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9208827A Withdrawn GB2266540A (en) | 1992-04-23 | 1992-04-23 | A process for forming a grid of polymeric material. |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2266540A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997047796A1 (en) * | 1996-06-11 | 1997-12-18 | Akzo Nobel N.V. | Grid comprising polymeric drawn strips and a process for making same |
| WO1999039055A1 (en) * | 1998-01-28 | 1999-08-05 | Huesker Synthetic Gmbh & Co. | Textile grating |
| US6312198B1 (en) | 1997-12-01 | 2001-11-06 | Akzo Nobel Nv | Geogrid and civil engineering structure comprising such a geogrid |
| WO2005064061A1 (en) | 2003-12-30 | 2005-07-14 | Samyang Corporation | A geogrid composed of fiber-reinforced polymeric strip and method for producing the same |
| WO2008097523A1 (en) | 2007-02-06 | 2008-08-14 | The Tensar Corporation | Integral polyethylene terephthalate grids, the method of manufacture, and uses thereof |
| US7674516B2 (en) * | 2007-03-01 | 2010-03-09 | Prs Mediterranean Ltd. | Geotechnical articles |
| CN106906710A (en) * | 2017-03-06 | 2017-06-30 | 东华大学 | A kind of preparation method of pp geo textiles/GSZ composite geotextile material |
| WO2021167253A1 (en) | 2020-02-17 | 2021-08-26 | 주식회사 휴비스 | Durability-enhanced fiber reinforced polymer strip and lattice-shaped geogrid using same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1289716A (en) * | 1968-09-20 | 1972-09-20 | ||
| GB2109427A (en) * | 1981-11-12 | 1983-06-02 | Conwed Corp | Plastic netting for use in palletized loads |
| EP0344318A1 (en) * | 1987-11-30 | 1989-12-06 | Hagihara Industries, Inc. | Nonwoven fabric and apparatus for manufacturing same |
-
1992
- 1992-04-23 GB GB9208827A patent/GB2266540A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1289716A (en) * | 1968-09-20 | 1972-09-20 | ||
| GB2109427A (en) * | 1981-11-12 | 1983-06-02 | Conwed Corp | Plastic netting for use in palletized loads |
| EP0344318A1 (en) * | 1987-11-30 | 1989-12-06 | Hagihara Industries, Inc. | Nonwoven fabric and apparatus for manufacturing same |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997047796A1 (en) * | 1996-06-11 | 1997-12-18 | Akzo Nobel N.V. | Grid comprising polymeric drawn strips and a process for making same |
| US6312198B1 (en) | 1997-12-01 | 2001-11-06 | Akzo Nobel Nv | Geogrid and civil engineering structure comprising such a geogrid |
| WO1999039055A1 (en) * | 1998-01-28 | 1999-08-05 | Huesker Synthetic Gmbh & Co. | Textile grating |
| AU741286B2 (en) * | 1998-01-28 | 2001-11-29 | Huesker Synthetic Gmbh | Textile grating |
| WO2005064061A1 (en) | 2003-12-30 | 2005-07-14 | Samyang Corporation | A geogrid composed of fiber-reinforced polymeric strip and method for producing the same |
| EP2122067A1 (en) * | 2007-02-06 | 2009-11-25 | The Tensar Corporation | Integral polyethylene terephthalate grids, the method of manufacture, and uses thereof |
| WO2008097523A1 (en) | 2007-02-06 | 2008-08-14 | The Tensar Corporation | Integral polyethylene terephthalate grids, the method of manufacture, and uses thereof |
| EP2122067A4 (en) * | 2007-02-06 | 2013-01-16 | Tensar Corp | Integral polyethylene terephthalate grids, the method of manufacture, and uses thereof |
| US9249552B2 (en) | 2007-02-06 | 2016-02-02 | Tensar Corporation | Integral polyethlene terephthalate grids, the method of manufacture, and uses thereof |
| USRE49523E1 (en) | 2007-02-06 | 2023-05-09 | Tensar Corporation, Llc | Integral polyethylene terephthalate grids, the method of manufacture, and uses thereof |
| US7674516B2 (en) * | 2007-03-01 | 2010-03-09 | Prs Mediterranean Ltd. | Geotechnical articles |
| CN106906710A (en) * | 2017-03-06 | 2017-06-30 | 东华大学 | A kind of preparation method of pp geo textiles/GSZ composite geotextile material |
| WO2021167253A1 (en) | 2020-02-17 | 2021-08-26 | 주식회사 휴비스 | Durability-enhanced fiber reinforced polymer strip and lattice-shaped geogrid using same |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9208827D0 (en) | 1992-06-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100580337B1 (en) | Large surface area geogrids with a high tensile strength, a method and apparatus for producing them, and their use as drain and reinforcement grids and as fences | |
| CA2304993C (en) | Building panel | |
| GB2266540A (en) | A process for forming a grid of polymeric material. | |
| GB2035191A (en) | Plastics material mesh structure | |
| EP0528879A1 (en) | Process for producing a composite from polypropylene. | |
| KR100648470B1 (en) | Resin net and its production method, and drawn product of polyethylene based resin | |
| US5458711A (en) | Process for forming a grid of polymeric material for supporting a structure | |
| CN105400159B (en) | A kind of regenerative PET/TPR alloy GSZ and preparation method thereof | |
| CN204715336U (en) | A kind of crossbar contact overlap joint injection moulding clad type geo-grid | |
| CN103866772B (en) | Reinforcement product and the Manufacturing approach and use of the reinforcement product for geotechnique's application | |
| CA2277259A1 (en) | Heavy duty packaging film | |
| KR100599498B1 (en) | Amorphous polymer strap and method of manufacturing same use for geogrid | |
| WO2002030662A2 (en) | Lightweight construction elements and method for the production thereof | |
| JP3533019B2 (en) | Waterproof sheet | |
| WO2004048072A1 (en) | Rigid composite structure | |
| DE1778516A1 (en) | Process for the production of molded articles from foam-shaped olefin polymers | |
| DE1962640A1 (en) | Water proof knubbed film for constructional - elements | |
| CN2274131Y (en) | Plastic net film | |
| CN211137798U (en) | PE pipe is retrieved and is smashed blevile of push | |
| CN214363397U (en) | Geogrid afforestation soil stabilization device | |
| JPH04216925A (en) | Network structure | |
| CN113502704A (en) | Be used for road bed to add muscle reinforced plastic geogrid | |
| KR20040064667A (en) | Geogrid of high molecular polymer material produced by laser welding and production method thereof | |
| JPH04228723A (en) | Ground reinforcing net | |
| JPH0299318A (en) | High molecular sheet and container |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |