WO2010088468A2 - Produits d'exclusion et de confinement d'eau - Google Patents

Produits d'exclusion et de confinement d'eau Download PDF

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Publication number
WO2010088468A2
WO2010088468A2 PCT/US2010/022516 US2010022516W WO2010088468A2 WO 2010088468 A2 WO2010088468 A2 WO 2010088468A2 US 2010022516 W US2010022516 W US 2010022516W WO 2010088468 A2 WO2010088468 A2 WO 2010088468A2
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WO
WIPO (PCT)
Prior art keywords
polyethylene
product
water
particles
bentonite
Prior art date
Application number
PCT/US2010/022516
Other languages
English (en)
Other versions
WO2010088468A3 (fr
Inventor
Patrick J. Mcgroarty
Original Assignee
Tegraseal Products, Llc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tegraseal Products, Llc filed Critical Tegraseal Products, Llc
Publication of WO2010088468A2 publication Critical patent/WO2010088468A2/fr
Publication of WO2010088468A3 publication Critical patent/WO2010088468A3/fr

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Classifications

    • 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
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/24—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of indefinite length
    • B29C41/32—Making multilayered or multicoloured articles
    • 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
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/24—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of indefinite length
    • B29C41/28—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of indefinite length by depositing flowable material on an endless belt
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • 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
    • C08K3/34—Silicon-containing compounds
    • 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
    • B29K2023/0608—PE, i.e. polyethylene characterised by its density
    • B29K2023/0625—LLDPE, i.e. linear low density 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/16—Fillers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/08—Copolymers of ethene
    • 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

Definitions

  • the bentonite thickened water (drilling mud) was then pumped down the well to act as a scavenger to pick up the tailings created during the drilling process.
  • the thickened water was then pumped from the well site, carrying the refuse with it. Soon, it was found that this "drilling mud" also had the capacity to seal off aquifers that were penetrated during the drilling process, thus preventing water from contaminating the nearby crude oil resource.
  • Bentonite has been used in granular form. Early on, additives were added to the granular bentonite to create a stickiness that would adhere to a surface. Eventually, adhesives were added and the bentonite was glued to a secondary plastic sheet that permitted nailing or sticking the waterproofing sheet to an area to be waterproofed.
  • the present invention includes a water containment and exclusion product.
  • the product of this invention both contains and excludes water. It should be understood that these words may be used interchangeably herein. The use of the product will determine whether it contains or excludes water or both.
  • the water product includes bentonite particles and polyethylene wherein the polyethylene forms a matrix around the bentonite particles and substantially holds the bentonite particles in place to form a bentonite polyethylene matrix (BPM).
  • BPM bentonite polyethylene matrix
  • the bentonite particles in the BPM upon exposure to water, absorb the water making the product substantially impermeable to additional water.
  • the polyethylene may be reclaimed polyethylene, virgin polyethylene or a combination of both.
  • the present invention includes a method of making a bentonite polyethylene matrix layer.
  • the method includes dispensing a particulate pre-mix of bentonite particles and polyethylene film particles onto a surface and heating the pre-mix sufficiently to enable the polyethylene particles to soften and flow around the bentonite particles to form a bentonite polyethylene matrix upon cooling.
  • the surface may be a conveyor belt with a smooth surface or a non-smooth surface such as a serrated surface.
  • the present invention includes a method of making a water containment product.
  • the method includes dispensing a particulate pre- mix of bentonite particles and polyethylene film particles onto a surface and heating the pre-mix on the surface sufficiently to enable the polyethylene particles to soften and flow around the bentonite particles to form a bentonite polyethylene matrix layer upon cooling.
  • the method may include adding one or more additional layers.
  • the additional layers may include, for example, additional layers of BPM, a sheet of fabric, a sheet of metal foil, a polymer sheet or a combination of these layers.
  • the present invention includes a method of waterproofing a structure.
  • the method includes placing a water containment product in contact with the structure to be water proofed wherein the product includes bentonite polyethylene matrix.
  • the present invention includes a method of reclaiming polyethylene.
  • the method includes shredding reclaimed polyethylene articles into particles and dispensing a particulate pre-mix of bentonite particles and polyethylene particles onto a surface.
  • the method also includes heating the pre-mix sufficiently to enable the polyethylene particles to soften and flow around the bentonite particles to form a bentonite polyethylene matrix upon cooling.
  • Fig. 1 is a schematic representation of a side view of an apparatus for making bentonite polyethylene matrix.
  • Fig. 2a is a schematic representation of a side view of an apparatus for making a water containment product with a sheet embedded between two layers of BPM.
  • Fib. 2b is a side view of a wall with the product of Fig. 2a applied to the outer surface followed by insulation.
  • FIG. 3 is a schematic representation of a side view of an apparatus for making a water containment product with a serrated surface and a fabric cover.
  • Fig. 4a is a side view of a water proofing sheet placed in the ground of a landfill. (Forms a waterproofing layer and a drainage area.)
  • Fig. 4b is a side view of a wall with a water proofing sheet applied to the outer surface. (Forms a waterproofing layer and a drainage area.)
  • Fig, 5a is a perspective of a water stop in a cold joint.
  • Fig. 5b is a sectional view of Fig. 5a.
  • the water containment products are substantially impermeable to water, the water containment products can prevent (exclude) water from entering into a structure in some embodiments. Alternatively, the water containment products can be used to retain water within a structure.
  • the present invention also includes methods of making a series of bentonite water containment and exclusion products based on the usage of polyethylene film particles and bentonite particles.
  • the water containment and exclusion products of the present invention can be advantageously made from reclaimed or recycled polyethylene films instead of synthesizing the polyethylene from petroleum or natural gas raw materials thus avoiding production of vapors, fumes, gases or sensitive residues. Furthermore, the water containment and exclusion products can be made without additional adhesives, plasticizers, solvents, carriers and fluidizers making the production of these products more environmentally safe than previous procedures.
  • the water containment and exclusion products generally include at least a layer of the BPM that acts as a base.
  • the BPM base can be used by itself or the BPM base can be modified in shape, texture, components, size and strength to create products customized for specific water control conditions.
  • BPM containing products can be produced that are highly resistant to damage and can be used in a variety of conditions typically not amenable to bentonite sheets.
  • reclaimed or “recycled”, it is meant that the polyethylene used has been already formed into films for other purposes such as bags.
  • bentonite polyethylene matrix it is meant that a polyethylene matrix or lattice is formed by heating polyethylene film particles in the presence of bentonite particles and that bentonite particles are held within the polyethylene matrix.
  • water containment and exclusion products any products that are substantially impermeable to water and include the bentonite polyethylene matrix (BPM) described above.
  • BPM bentonite polyethylene matrix
  • Water exclusion products may be products that prevent water from entering into a structure.
  • water containment products may be products that prevent water from leaving a structure.
  • Water proofing sheets are one example of both a water containment and exclusion product depending on the product's use.
  • the products of the present invention include polyolefins such as polyethylene and polypropylene.
  • the products can include reclaimed polyolefin films, virgin polyolefin or a combination of both. Common sources of reclaimed polyolefin films are plastic bags that include polyethylene film.
  • the polyolefins can be of varying densities and preferably, are low-density or linear low-density polyolefins.
  • the water containment and exclusion products include low-density polyethylene (LDPE) and/or linear low-density polyethylene (LLDPE).
  • LDPE low-density polyethylene
  • LLDPE linear low-density polyethylene
  • the polyethylene may be virgin polyethylene, reclaimed polyethylene or a combination of both.
  • the water containment and exclusion products are predominantly reclaimed LDPE and/or LLDPE.
  • the polyethylene film generally has a low melting point.
  • the low melting point polyethylene films are preferred in the present invention because they require less energy to melt or soften.
  • the melting point of the polyethylene film can be, for example between about 24O 0 F and about 34O 0 F. In one exemplary embodiment, the polyethylene film has a melting point of about 24O 0 F.
  • Polyethylene films can have a mixture of different polyethy ⁇ ertes with variable melting points.
  • the finished water containment products may include polyethylene film particles that are melted and/or softened.
  • the finished water containment and exclusion products may also include some polyethylene film particles that are unaffected (not melted or softened) mixed in with the bentonite.
  • the types and concentrations of the various LDPE and LLDPE commonly found in reclaimed polyolefins can produce an end product of various tensile strengths.
  • the tensile strength of the water containment product is preferably between about 1500 PSI and about 1800 PSI. Products with tensile strength out of this range are also within the scope of this invention.
  • the tensile strength may also be affected by the final composition of the product and the degree of lamination of the product.
  • the polyethylene film is generally ground to a particulate form for use in making the water containment products of the present invention.
  • the polyethylene film is ground to particles of various sizes and that are, preferably, between about 10 mesh size to about 300 mesh size.
  • the bentonite particles in the present invention can be of varying size. Preferably, the bentonite particles are between about 30 mesh and about 60 mesh. Bentonite particles outside this range are also within the scope of the invention.
  • the water containment products of the present invention generally include at least one layer of BPM.
  • a water containment product that includes a layer of BPM is shown in Fig. 1.
  • Fig. 1 illustrates the production of BPM 50 and is described in detail below.
  • the BPM layer may be used as a water containment product. Alternatively, the BPM layer may be used as a base to which one or more additional layers may be added to generate water containment products with additional attributes.
  • the content of a layer of BPM can vary in terms of the concentration of the polyethylene present.
  • the percentage of polyethylene is between about 15% percent by weight and about 30% by weight in the BPM.
  • the concentration of the polyethylene in the BPM may be determined by the end use.
  • the concentration of polyethylene is between about 12 percent by weight and about 15 percent by weight.
  • each of the layers may have a different concentration of polyethylene.
  • a water containment product includes two layers of BPM with a polymer sheet in the middle, the top layer included about 15 percent by weight of polyethylene and the bottom layer included about 30 percent by weight of polyethylene.
  • Concentrations of polyethylene greater than 30 percent by weight are also within the scope of this invention. However, as the concentration of polyethylene increases over 30 percent by weight, the activation of bentonite can be reduced in the presence of water. This can occur because the higher amount of polyethylene tends to coat the bentonite particle and acts to bar the penetration of additional water resulting in lower absorption and less expansion of the bentonite layer. Products that could have long exposure to inclement weather may be manufactured with increased polyethylene content in order to gain inclement weather protection.
  • the thickness of a layer of BPM can vary and is generally between about 1/32 of an inch and about 3/8 of an inch. Preferably, the thickness of a layer of the BPM is between about 1/8 inch and about 1/4 inch.
  • the surface of the BPM may be smooth on both the top and bottom.
  • both the top and/or the bottom surface may be a textured, non- smooth surface.
  • Non-smooth surfaces can include, for example, a serrated or saw toothed surface, dimpled surface or sandpaper-like surface.
  • water containment product 210 is shown having a bottom surface that is serrated. This serrated surface 222 has the ability to grip soil 226 over which it is installed, for example, in the sloped surface of a landfill as shown in Fig. 4a.
  • Additional layers may be placed above or below a BPM layer to form a desired water containment and exclusion product.
  • These layers can include, for example, additional layers of BPM, polymer sheets, water permeable layers such as fabrics, metal foil sheets and the like.
  • the layers may be added after the manufacture of the BPM layer.
  • the layers may be added as part of a one step continuous process as exemplified in Fig. 2a and described in detail below.
  • a layer(s) of a polymer sheet may be incorporated into the water containment and exclusion products.
  • the polymer sheet can be, for example, a polyethylene sheet.
  • the polyethylene sheet preferably, has a thickness between about 4 mil and about 30 mil.
  • the polymer sheet can be embedded, for example, between two layers of BPM.
  • the polymer sheet may also be the bottom surface of a water containment and exclusion product or the top surface of a water containment and exclusion product.
  • a layer of particles may also be added to a BPM layer. In an exemplary embodiment illustrated in Fig. 3, a layer of bentom ' te particles are placed over a serrated BPM layer,
  • One or more water permeable layers such as synthetic fabric layers or natural fabric layers, for example, cotton and burlap, may be included in the water containment and exclusion products. These water permeable layers may be the top and/or bottom layers of the water containment product. The water permeable layers may be included for the purpose of protection, traction and/or drainage.
  • a fabric cover may be used, for example, over a layer containing bentonite particles to hold the particles in place.
  • a fabric layer may be adhered as the top layer of a water containment and exclusion product for the purpose of imparting protection or strength to the finished product. This is important when the product is installed prior to the concrete pour, i.e. waterproofing product is placed and the concrete added later.
  • a layer of fabric may be adhered over a serrated side, for example, when applying the water containment and exclusion product over a vertical wall as shown in Fig. 4b. The non-serrated side will form a seal to the concrete and the serrated side will act as a drainage zone by allowing the water to pass through the fabric (214) into the drainage cavities created when the serrated surface is covered by fabric.
  • a metal foil layer may also optionally be incorporated into a water containment and exclusion product.
  • the metal foil sheet can be aluminum, stainless steel and the like.
  • the metal foil sheet may be the top layer, bottom layer or may be incorporated also between two layers in the water containment products as shown in Fig. 2a.
  • the metal foil sheet is particularly useful as a gas permeability barrier when incorporated into a water containment product.
  • the metal foil sheet has a thickness between about 0.05 mm and about 0.1 mm thick.
  • the water containment and exclusion products of the present invention can have a thickness that is variable and dependent on the end use and installation environment.
  • the water containment and exclusion products have a thickness between about 1/16 of an inch and about Y% of an inch.
  • the water containment and exclusion products have a thickness of at least about 1/8 inch. More preferably, the water containment and exclusion products have a thickness of between about 1/8 inch and about 3/8 inch.
  • the water containment and exclusion products may be manufactured and used in rolls, sheets, strips, bands, boards and the like. The water containment and exclusion products, for example, may be manufactured in large rolls and cut to the desired size for use in specific conditions.
  • a BPM layer is applied to one side of a substrate such as a plastic or foil sheet, then wound.
  • the wound roll with BPM on one side is then unwound and a BPM layer is applied to the other side of the substrate.
  • the resulting product includes a BPM layer on both sides of the substrate.
  • a top layer of fabric may then be applied to either side or to both, depending on the final usage of the product.
  • the present invention includes methods of making a BPM and methods of making water containment and exclusion products that include the BPM.
  • Reclaimed and/or virgin polyethylene film particles can be mixed with bentonite particles at a desired concentration of polyethylene to form a premix.
  • the premix particles are placed on a surface, preferably the surface of a conveyor belt.
  • the conveyor belt surface is a non-stick silicone or Teflon surface that allows the BPM to easily be removed after formation.
  • heat is applied to the premix particles on the conveyor belt to soften the polyethylene film particles sufficiently to permit the polyethylene particles to flow around the bentonite particles.
  • the premix is heated prior to dispensing the premix onto the surface.
  • the polyethylene particles fuse to form a lattice or a type of matrix that securely holds the bentonite particles.
  • the bentonite particles are trapped within this matrix of polyethylene and form a BPM layer or sheet.
  • the BPM sheet can be removed from the conveyor belt.
  • the BPM sheet may, in some embodiments, be used as a water containment product.
  • the layer of BPM forms a base product that may be then modified to create products for specific water control functions.
  • Modifications may be made to alter the strength of the sheet, to add additional layers with different concentrations of polyethylene, to add additional layers such as a fabric layer, a polymer sheet layer or a metal foil layer and to create layers that have non-smooth surfaces.
  • FIG. 1 illustrates one exemplary embodiment of forming a BPM sheet of the present invention.
  • Fig. 1 shows conveyor 10 with idler roller 14, drive roller 18 and belt 22.
  • Belt 22 is silicon/Teflon coated.
  • Hopper 26 contains premix 30 of reclaimed polyethylene film particles 34 and bentonite particles 38. Hopper 26 dispenses a selected amount of premix 30 onto belt 22. Premix 30 disposed on belt 22 travels under heater 42.
  • the heat from heater 42 softens polyethylene particles 34 sufficiently to permit flow of the polyethylene and so that the polyethylene particles unite to form matrix 46.
  • the polyethylene flows around bentonite particles 38 thereby trapping bentonite particles 38 within the polyethylene matrix 46.
  • the mixture cools forming sheet 50.
  • the heating of the polyethylene need be in some instances sufficient to join adjacent polyethylene particles thereby providing integrity to sheet 50.
  • Sheet 50 peels off of belt 22 as it goes over drive roller 18 due to non-stick nature of belt 22.
  • Sheet 50 has a BPM and may be used as a water containment product.
  • a polymer sheet may be placed on the conveyor belt prior to the deposition of the premix. This results in a water containment product with a polymer sheet and a BPM layer.
  • the composition of the premix deposited on the conveyor belt can vary and is dependent on the desired end use of the product.
  • the premix preferably contains between about 15 percent and about 30 percent of polyethylene particles by weight, The percentage of polyethylene in the premix may be altered to modify the characteristics of the resulting product. Adjusting this ratio, broadens the number of uses for the water containment products.
  • the water containment products of this invention can be used in traffic bearing situations.
  • concrete can be pressure pumped directly onto water proofing sheets with a BPM layer without any additional protection. Water containment products can also be used in longer term exposed situations to inclement weather.
  • the amount of premix deposited on the flat surface can vary.
  • the amount of the bentonite/polyethylene premix deposited on the belt per hopper depends on the speed of the belt and the temperature of the heated surface. Preferably, between about 0.05 lbs. to about 0.2 lbs. per hopper per second are deposited.
  • Conveyor belt if used, for formation of the water containment products preferably has a non-stick surface.
  • the non-stick surface can be, for example, Teflon, stainless steel, silicone and the like.
  • the conveyor belt may have a smooth surface.
  • the conveyor belt has a textured, non smooth surface such as a serrated surface.
  • the mixture of heated polyethylene and bentonite particles is allowed to cool for a period of time to form the matrix with the trapped bentonite particles. Cooling may be performed by letting the polyethylene cool to room temperature without the use of any cooling devices. Alternatively, cooling devices such as fans and coolers may also be used.
  • Hoppers 156a, 156b, 156c, 156d, and 156e contain premix 164a, 164b, 164c, 164d, and 164e, respectively.
  • Premixes 164a-e contain polyethylene particles 168 and bentonite particles 172.
  • Hopper 156a deposits premix 164a followed by heating from heater 176a.
  • hopper 156b deposits premix 164b followed by heating from heater 176b.
  • hopper 156c deposits premix 164c followed by heating from heater 176c.
  • sheet 180 is guided onto belt 152 over BPM 196a by guide roller 184.
  • Sheet roll 188 threads sheet 180 into guide roller 184.
  • BPM 96 forms a serrated bottom surface as shown in Fig. 3.
  • Hopper 100 contains only bentonite particles 88 that are deposited on BPM 96.
  • Fabric cover 108 is guided onto bentonite particles 88 by guide roller 112.
  • Cover roll 116 threads fabric cover 108 into guide roller 112.
  • Fabric cover 108 can hold bentonite particles 88 in place in water containment product 120.
  • the present invention also includes methods of water proofing a structure.
  • Water containment products may be used as rolls, sheets, strips and the like. These products are generally placed on the surface that should desirably remain dry.
  • Fig. 4a illustrates an exemplary embodiment of water proofing sheet 210 placed in a landfill having a sloped surface.
  • water proofing sheet 210 includes serrated surface 222, BPM 218 and a fabric layer 214. Serrated surface 222 of water proofing sheet 210 grips soil 226 and holds the water proofing sheet in place.
  • Fig. 4b illustrates another exemplary embodiment in which water proofing sheet 210 is placed against wall 240 to prevent water from penetrating into wall 240.
  • water proofing sheet 210 includes fabric layer 214, serrated polyethylene layer 222 and BPM 218.
  • Water proofing sheet 210 has an outside fabric cover 214 that can act as a drainage zone by allowing the water to pass through the fabric cover 214 into the drainage cavities created when the serrated surfaces are covered by fabric cover 214.
  • Water proofing sheet when applied to walls, can be affixed to the walls using a variety of techniques.
  • the water proofing sheet may be, for example, stapled, nailed, or glued to a wall surface.
  • Exterior of walls, floors and foundations may be water proofed with water containment products that have a layer of metal foil integrated into the sheet.
  • the metal foil layer is preferably embedded between BPM layers so that the BPM prevents water from reaching the metal foil layer and damaging it.
  • the metal foil layer can, thus, act to reduce the permeability of gases through the water containment product.
  • the metal foil is preferably aluminum or stainless steel foil.
  • a method of reclaiming polyethylene film is also included in the present invention.
  • Polyethylene to be reclaimed is shredded into particles. Shredding of polyethylene film may be performed using any number of devices in the art. Preferably, the size of the particles is between about 10 mesh and about 300 mesh.
  • the polyethylene particles are combined with bentonite particles to form a premix of a desired ratio.
  • the premix can be applied to a surface such as a conveyor belt, heated sufficiently to allow the polyethylene particles to flow around the bentonite particles and, upon cooling, form a BPM.
  • the BPM can be used as a water containment product after removal from the surface. Alternatively, additional layers may be added, as described above, to construct the desired water containment product.
  • Yet another product is made by applying a first layer of BPM to a nonstick surface of serrated silicon or Teflon thus creating an irregular surface with the ability to grip and earth and surface over which it is installed. This characteristic is important for use on a slope surface of a landfill covered with fabric to create a drainage layer.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
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Abstract

L'invention concerne des produits de confinement d'eau et des procédés de production de produits de confinement d'eau qui consistent à utiliser des particules de film de polyéthylène récupérées (34) et des particules de bentonite (38). Une matrice de bentonite polyéthylène (BPM) (50) est formée de particules de bentonite (38) piégées dans une matrice de polyéthylène (46). Les produits comprenant la BPM (50) peuvent fonctionner comme des produits de confinement d'eau du fait que les particules de bentonite (38) à l'intérieur de la BPM 50 absorbent et empêchent l'eau de s'infiltrer à travers la BPM (50). Une couche de BPM (50) peut être modifiée par ajout d'autres couches afin de personnaliser le produit de confinement d'eau pour une utilisation finale désirée.
PCT/US2010/022516 2009-01-30 2010-01-29 Produits d'exclusion et de confinement d'eau WO2010088468A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14844709P 2009-01-30 2009-01-30
US61/148,447 2009-01-30

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WO2010088468A2 true WO2010088468A2 (fr) 2010-08-05
WO2010088468A3 WO2010088468A3 (fr) 2010-11-25

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Cited By (2)

* Cited by examiner, † Cited by third party
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CN103496709A (zh) * 2013-09-30 2014-01-08 辽宁辽河油田康达实业集团有限公司 具有抗盐和抗酸性能的改性膨润土及其制备方法
WO2016146709A1 (fr) * 2015-03-17 2016-09-22 Volteco S.P.A. Membrane autoréparable et auto-obturante étanche à l'eau, servant à isoler des structures bâties soumises à une pression hydrostatique

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US20060009100A1 (en) * 2004-07-08 2006-01-12 Mcgroarty Bryan Waterproofing membrane
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US4693923A (en) * 1985-11-22 1987-09-15 Mcgroarty Bryan M Water barrier
US5091234A (en) * 1989-06-30 1992-02-25 Mcgroarty Bryan M Composite water barrier sheet
EP1517784B1 (fr) * 2002-06-12 2006-12-13 Rawell Group Holdings Limited Methode de fabrication d'un materiau impermeabilisant
US20060009100A1 (en) * 2004-07-08 2006-01-12 Mcgroarty Bryan Waterproofing membrane
US20070015009A1 (en) * 2004-07-08 2007-01-18 Mcgroarty Bryant Insulating board with bentonite

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103496709A (zh) * 2013-09-30 2014-01-08 辽宁辽河油田康达实业集团有限公司 具有抗盐和抗酸性能的改性膨润土及其制备方法
WO2016146709A1 (fr) * 2015-03-17 2016-09-22 Volteco S.P.A. Membrane autoréparable et auto-obturante étanche à l'eau, servant à isoler des structures bâties soumises à une pression hydrostatique
US11007755B2 (en) 2015-03-17 2021-05-18 Volteco S.P.A. Self-repairing and self-sealing waterproof membrane, for insulating built structures subjected to hydrostatic pressure

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