An integral polymer grid with a plurality of interconnected, oriented polyethylene terephthalate strands and an array of openings therein is made from a polyethylene terephthalate sheet-like starting material having perforations or indentations therein that form the openings when the sheet-like material is uniaxially or biaxially stretched. The grid has a higher tensile strength to weight ratio and a higher creep reduced strength to weight ratio than corresponding ratios associated with a grid made from a non-polyethylene terephthalate starting material.
E02D 17/00 - ExcavationsAménagement des bords des excavationsConstruction de digues ou de terre-pleins
B29C 55/04 - Façonnage par étirage, p. ex. étirage à travers une matriceAppareils à cet effet de plaques ou de feuilles suivant un seul axe, p. ex. étirage oblique
B29C 55/12 - Étirage suivant plusieurs axes suivant deux axes
B29D 28/00 - Fabrication de filets ou d'objets similaires
E02D 31/00 - Dispositions de protection pour les fondations ou ouvrages réalisés par des techniques de fondationMesures dans le cadre des techniques de fondation pour protéger le sol ou l'eau du sous-sol, p. ex. prévention ou neutralisation de la pollution par le pétrole
2.
Method of making an integral geogrid from a coextruded multilayered polymer starting material
An integral geogrid includes a plurality of interconnected, oriented strands having an array of openings therein that is produced from a coextruded multilayer polymer sheet starting material. By virtue of the construction, the coextruded multilayer sheet components provide a crystalline synergistic effect during extrusion and orientation of the integral geogrid, resulting in enhanced material properties that provide performance benefits to use of the integral geogrid in soil geosynthetic reinforcement.
B29C 48/21 - Articles comprenant au moins deux composants, p. ex. couches coextrudées les composants étant des couches les couches étant jointes à leurs surfaces
B29C 48/08 - Moulage par extrusion, c.-à-d. en exprimant la matière à mouler dans une matrice ou une filière qui lui donne la forme désiréeAppareils à cet effet caractérisées par la forme à l’extrusion de la matière extrudée plate, p. ex. panneaux flexible, p. ex. pellicules
B29C 48/305 - Filières ou matrices d’extrusion avec une large ouverture, p. ex. pour former des feuilles
B29C 48/16 - Articles comprenant au moins deux composants, p. ex. couches coextrudées
B29C 48/18 - Articles comprenant au moins deux composants, p. ex. couches coextrudées les composants étant des couches
B29C 48/49 - Moyens pour plastifier ou homogénéiser la matière à mouler ou pour la forcer dans la filière ou la matrice utilisant plusieurs extrudeuses pour alimenter une matrice ou une filière
B29C 55/02 - Façonnage par étirage, p. ex. étirage à travers une matriceAppareils à cet effet de plaques ou de feuilles
B29C 55/04 - Façonnage par étirage, p. ex. étirage à travers une matriceAppareils à cet effet de plaques ou de feuilles suivant un seul axe, p. ex. étirage oblique
B29C 55/12 - Étirage suivant plusieurs axes suivant deux axes
E02D 3/00 - Amélioration ou conservation du sol ou de la roche, p. ex. conservation du permagel
B29C 48/00 - Moulage par extrusion, c.-à-d. en exprimant la matière à mouler dans une matrice ou une filière qui lui donne la forme désiréeAppareils à cet effet
B32B 3/26 - Produits stratifiés comprenant une couche ayant des discontinuités ou des rugosités externes ou internes, ou une couche de forme non planeProduits stratifiés comprenant une couche ayant des particularités au niveau de sa forme caractérisés par une couche continue dont le périmètre de la section droite a une allure particulièreProduits stratifiés comprenant une couche ayant des discontinuités ou des rugosités externes ou internes, ou une couche de forme non planeProduits stratifiés comprenant une couche ayant des particularités au niveau de sa forme caractérisés par une couche comportant des cavités ou des vides internes
B32B 27/08 - Produits stratifiés composés essentiellement de résine synthétique comme seul composant ou composant principal d'une couche adjacente à une autre couche d'une substance spécifique d'une résine synthétique d'une sorte différente
B32B 27/32 - Produits stratifiés composés essentiellement de résine synthétique comprenant des polyoléfines
3.
Free-wheeling-resistant rolls for mining roof support and the combination of a mining machine and such rolls
A roll of grid material for mine roof support, and a mining machine in combination with such a roll, in which the roll has bands of adhering material injected or otherwise forced into the roll in spaced locations along the roll's width. The adhering material interconnects the overlapped layers within the roll and is sufficiently strong to hold the grid material in the rolled configuration for transport and storage, and yet is readily pulled apart in response to sufficient manual or mechanical pressure applied against the roll, or tension applied to the unwound portion thereof, so as to enable the grid material to be incrementally unwound and installed in the mine. The rolls can be installed using a range of mining machines without need for any specialized dispensing or other apparatus mounted on the machine and without the need for any mechanical device to control unwinding.
E21D 11/00 - Revêtement de tunnels, galeries ou autres cavités souterraines, p. ex. de vastes chambres souterrainesRevêtements à cet effetLeur exécution sur place, p. ex. par assemblage
B29C 65/48 - Assemblage d'éléments préformésAppareils à cet effet en utilisant des adhésifs
A three dimensional high strength tightly woven turf reinforcement mat (TRM) or reusable sediment filtration mat designed to trap soil particles in water flow and provide a shear plane to prevent soil wash-out from within and beneath the mat. The mat includes a corrugated body structure integrally extruded or interwoven with a bottom layer that together form a plurality of parabolic sediment entrapment chambers. As sediment bed load moves with water flow into the woven structure, water flow forces sediment through openings in the woven surface of the corrugated body structure and into the chambers where the captured sediment serves as ballast to self-anchor the mat. The mat may also be incorporated during manufacture and/or during/after installation with polyacrylamides, chitosans or other soil flocculating/ aggregating chemicals for increased sediment aggregation and capturing.
A roll of grid material for mine roof support, and a mining machine in combination with such a roll, in which the roll has bands of adhering material injected or otherwise forced into the roll in spaced locations along the roll's width. The adhering material interconnects the overlapped layers within the roll so that the roll is self-resistant to unrolling. Also provided is a method of making such a roll including the steps of winding a length of polymeric mesh material into a roll and applying an adhering material to the mesh material. The adhering material has sufficient strength to hold the roll in a wound configuration and prevent the roll from free-wheeling or unwinding due to the roll's own physical properties.
E21D 11/00 - Revêtement de tunnels, galeries ou autres cavités souterraines, p. ex. de vastes chambres souterrainesRevêtements à cet effetLeur exécution sur place, p. ex. par assemblage
6.
Light weight oriented net assembly for oil capture and containment
A light weight oriented net or netting assembly is provided for oil capture and containment. The netting assembly is made by biaxially stretching or orienting starting materials to form a pattern of oriented strands and integral junctions that, while being light in weight, is also strong enough to be used to capture and remove oil from contaminated water without an outer stabilizing jacket. The assembly is preferably made from oriented polypropylene netting that is folded, gathered, bunched and/or otherwise layered upon itself on the order of 16-64 times and then crimped in one or more locations to secure the netting layers in a bow tie or tubular configuration that forms net cavities and an open cell structure to capture and contain oil that has been dispersed in water. Oil in the netting assembly can then be removed, such as by pressing or other removal process, after which the netting assembly may be reused.
C02F 1/28 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par absorption ou adsorption
E02B 15/10 - Dispositifs pour enlever les substances de la surface
B01J 20/28 - Compositions absorbantes ou adsorbantes solides ou compositions facilitant la filtrationAbsorbants ou adsorbants pour la chromatographieProcédés pour leur préparation, régénération ou réactivation caractérisées par leur forme ou leurs propriétés physiques
C02F 1/68 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par addition de substances spécifiées, pour améliorer l'eau potable, p. ex. par addition d'oligo-éléments
An integral polymer grid with a plurality of interconnected, oriented polyethylene terephthalate strands and an array of openings therein is made from a polyethylene terephthalate sheet-like starting material having holes or depressions therein that form the openings when the sheet-like material is uniaxially or biaxially stretched. The grid has a higher tensile strength to weight ratio and a higher creep reduced strength to weight ratio than corresponding ratios associated with a grid made from a non-polyethylene terephthalate starting material.
A roll of grid material for mine roof support, and a mining machine in combination with such a roll, in which the roll has bands of adhering material injected or otherwise forced into the roll in spaced locations along the roll's width. The adhering material interconnects the overlapped layers within the roll and is sufficiently strong to hold the grid material in the rolled configuration for transport and storage, and yet is readily pulled apart in response to sufficient manual or mechanical pressure applied against the roll, or tension applied to the unwound portion thereof, so as to enable the grid material to be incrementally unwound and installed in the mine. The rolls can be installed using a range of mining machines without need for any specialized dispensing or other apparatus mounted on the machine and without the need for any mechanical device to control unwinding.
B65H 37/02 - Appareils délivrant des articles ou des bandes, comportant des dispositifs pour exécuter des opérations auxiliaires particulières pour appliquer des adhésifs
E21D 11/00 - Revêtement de tunnels, galeries ou autres cavités souterraines, p. ex. de vastes chambres souterrainesRevêtements à cet effetLeur exécution sur place, p. ex. par assemblage
10.
INTEGRAL POLYETHYLENE TEREPHTHALATE GRIDS, THE METHOD OF MANUFACTURE, AND USES THEREOF
A polymer mesh structure comprising a substantially uniplanar integral geogrid having a plurality of highly oriented strands interconnected by partially oriented junctions forming an array of openings in said geogrid, said integral geogrid formed of polyethylene terephthalate. A starting material for making an integral polymer geogrid. A soil construction comprising a mass of particulate material strengthened by embedding therein the polymer mesh structure. A method of strengthening a mass of particulate material, comprising embedding in the mass of particulate material, the polymer mesh structure. A method of making a polymer mesh structure. A method of providing a stabilized soil construction.
