WO2014089062A1 - Articles composites moulés par compression à partir de plastique recyclé - Google Patents

Articles composites moulés par compression à partir de plastique recyclé Download PDF

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Publication number
WO2014089062A1
WO2014089062A1 PCT/US2013/072851 US2013072851W WO2014089062A1 WO 2014089062 A1 WO2014089062 A1 WO 2014089062A1 US 2013072851 W US2013072851 W US 2013072851W WO 2014089062 A1 WO2014089062 A1 WO 2014089062A1
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WO
WIPO (PCT)
Prior art keywords
weight
hdpe
article
polymer component
mixed melt
Prior art date
Application number
PCT/US2013/072851
Other languages
English (en)
Inventor
Thomas Nosker
Jennifer Lynch
Original Assignee
Rutgers, The State University Of New Jersey
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
Priority claimed from US13/826,969 external-priority patent/US9422423B2/en
Priority claimed from US13/803,744 external-priority patent/US20140154349A1/en
Application filed by Rutgers, The State University Of New Jersey filed Critical Rutgers, The State University Of New Jersey
Priority to CA2893856A priority Critical patent/CA2893856A1/fr
Publication of WO2014089062A1 publication Critical patent/WO2014089062A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/245—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it being a foam layer
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/10—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products
    • E04C2/20—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products of plastics
    • E04C2/22—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products of plastics reinforced
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0011—Combinations of extrusion moulding with other shaping operations combined with compression moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/002—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor characterised by the choice of material
    • 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
    • B29K2105/26—Scrap or recycled material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/02—Coating on the layer surface on fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2272/00—Resin or rubber layer comprising scrap, waste or recycling material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/54—Yield strength; Tensile strength
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles

Definitions

  • the present invention relates to fiber glass-enhanced polymer composite materials prepared from recycled plastics, processes of preparing these materials, and use of the materials for making articles having wide industrial applications.
  • Plastics are ubiquitous and play important roles in industries as well as in people's daily life. Recycled plastic materials provide an inexpensive source of plastics. Proper recycling of plastic wastes and re-processing them into useful materials or articles can not only protect environments but may also create huge economic values. However, recycled plastics are often difficult to reformulate into useable products, especially products with consistent mechanical properties.
  • plastics are typically obtained by curbside collection, which itself presents problems as to quality and consistency.
  • the types of plastic materials thai are typicall designated for curbside recycling are unpigmented high density polyethylene (ilDPE) and polyethylene terephthalate (PET), which together constitute about 80% of the collected recycled plastics.
  • ilDPE unpigmented high density polyethylene
  • PET polyethylene terephthalate
  • sonic industries have standardized their plastic package materials. For example, plastic milk bottles are made from unpigmented HOPE, while plastic carbonated beverage bottles are made from PET (one-piece containers) or PET/KDPE (two-piece containers). These containers arc easily identified and thus are relatively easy to segregate, thereby facilitating the recycling of these two plasties. This is the reason why these two types of plastic are designated for acceptable curbside recycling designated for resin recovery.
  • the present invention provides suc another new technique in processing recycled plastics and converting them to useful materials for consumer and industrial use.
  • the invention relates to a method of mantrfacturing plastic composite articies from recycled plastics and an optional glass bead or fiber reinforcing component, by processing them into composite panels and other useful articles.
  • the manufacturing method involves an extnisioiv'compression molding process.
  • the present invention provides a compression molded composite article comprising an HDPE polymer component and distributed therein between about 1% and about 45% by weight of a glass bead or fiber reinforcing component based on the weight of die finished composite article.
  • the polymer component contains between about 80% and about 100% by weight of HDPE based on the total weight of the polymer component, in which at least about 20% b weight or more of the HDPE is post- consumer HDPE.
  • the composite article is a flat, square or rectangular sheet or panel.
  • the present invention provides a compression molded polymer article comprising HDPE, wherein the article contains between about 80% and about 100% by weight of HDPE, in which at least about: 20% by weight or more of the HDPE is post-consumer HDPE.
  • the polymer article is a flat, s uare or rectangular HDPE panel.
  • the present invention provides a laminate of two composite panels or HDPE panels sandwiching a third polymer layer, in one embodiment the third polymer layer is a polymer foam.
  • the laminate can be dimensioned for and used as a truck or trailer bed, interior and exterior building walls, temporary structures, and the like.
  • the present invention provides thermoformed- HDPE articles of predetermined shapes and thicknesses, in one embodiment the articles contain an HDPE polymer component and distributed therein between about 1 % and 45% by weight of a glass bead or fiber reinforcing component based on the weight of the finished composite shape.
  • the present invention provides a corrugated panel thermoformed from: an HDPE panel, or a composite panel containing an HDPE polymer component and distributed therein between about 1% and about 45% by weight of a glass bead or fiber reinforcing component based on the weight of the finished composite panel, as described above.
  • the present invention provides an embossed panel thermofermed from an HDPE panel, or a composite panel containing an HDPE polymer component and distributed therein between about 1% and about 45% by weight of a glass bead or fiber reinforcing component based on the weight of the finished composite panel, as described above.
  • the present invention provides a boat or aircraft hull thermoformed from an HDPE panel, or a composite panel containing an HDPE polymer component and distributed therein between about 1% and about 45% by weight of a glass bead or fiber reinforcing component: based on the weight of the finished composite panel as descri bed above .
  • the present invention provides a reaction vessel theraioformed from an HDPE panel, or a composite panel containing a HDPE polymer component and distributed therein between about 1% and about 45% by weight of a giass bead or fiber reinforcing component based on the weight of the finished composite panel, as described above.
  • the present invention provides a solar panel comprising a plurality of solar cells disposed in a single layer on the surface of an HDPE panel, or a composite panel containing an HDPE polymer component and distributed therein between about 1% and about 45% by weight of a glass bead or fiber reinforcing component based on the weight of the finished composite panel, as described above.
  • the present invention provides a building integrated photovoltaic device comprising the solar panel as described above.
  • the present invention provides a method of making a plastic composite article comprising the steps of
  • the present inventio provides a method of increasing the modulus of a recycled plastic article formed from a mixed melt of a post-consumer HDPE polymer component containing an amount of one or more polymers selected from polyethylene (PE), polypropylene (PP) and low density polyethylene (LDPE) that is sufficient to reduce the modulus of the article below 150,000 psi, wherein the method adds to the HDPE polymer component, prio to the formation of the mixed melt, an amount of a radical initiator effective to provide an article with modulus greater than 150,000 psi.
  • PE polyethylene
  • PP polypropylene
  • LDPE low density polyethylene
  • FIGURE 1 illustrates an extrusion/compression molding process and equipment setup for preparation of the plastic composite panels.
  • the present invention relates to a method of manufacturing plastic composite articles from recycled plastics and optional reinforcing glass beads or fibers, and processing them into composite panels ami other useful articles having wide application.
  • the manufacturing method involves an extrusion/compression molding process.
  • Plastic polymers and plastic composite -materials offer a viable alternative to wood and concrete.
  • Manufactured plastic composites can exhibit the necessary stiffness strength, resistance to heat expansion and deformation, as well as increased resistance to degradation from moisture, excessive sunlight and attacks by microorganisms and insects.
  • Plastic panels would also have a longer expected service liie thereby reducing the labor and material costs associated with replacement
  • the present, invention provides a composite article, in one embodiment of this aspect, the composite article contain a polymer component and distributed therein between about 1% and about 45% by weight of a glass bead or fiber reinforcing component based on the weight of the finished composite article, wherein the polymer component contains between about 80% and about 100% b weight of HDPE based on the weight of the polymer component, in which at least about 20% by weight or more of said HDPE is post-consumer HDPE, in another embodiment of this aspect, the polymer component includes between about 90% and about 100% HDPE by weight, in another embodiment of this aspect, 100% of the HDPE in the polymer component is post-consumer HDPE. in another embodiment of this aspect, 100% of the polymer component is post-consumer polymers.
  • Post-consumer plastic for the HDPE component can be obtained from the recycled HDPE beverage containers and other containers (e.g., 5 gallon pails and 55 gallon drums).
  • Post- consumer fiber glass-filled HDPE, such as bumper covers from cars, can also be used.
  • the composite article further contains up to about 20% b weight, based on the weight of the polymer component, of at least one post- consumer polymer selected from FE, PP and LDPE.
  • the glass bead or fiber reiaforcing component is present in an amount between about 10% and about 30% by weight based on the weight of the finished composite article. In another embodiment the glass bead or fiber reinforcing component in present in an araount that is between about 15% and about 25% by weight based in the weight of the finished composite article.
  • the fiber component has a minimum length of 0.1 mm.
  • the fiber component comprises torrefied wood, rock wool or fiber glass.
  • Glass beads and fiber glass have radiative heat transfer properties and their incorporation reduces the thermal expansion coefficient of articles formed from the melt mixture while increasing stiffness.
  • the glass beads and fiber glass can also serve as a fire retardant, for which halogenated products are typically used. Replacement of halogenated products with fiber glass as fire-retardanis also reduces potential exposure of people to hazardous halogenated products produced when retarding combustion, which are known to be dangerous to health.
  • Glass beads and fiber glass are also advantageous compared to metal hydroxide fire retardants, because metal hydroxides release H 2 0 when heated.
  • the finished composite .material is glass bead or fiber reinforcin component or a mixture thereof, and the material is fire retardant.
  • greater than 25% by weight of the finished composite material is fiber glass.
  • .nano fiber glass or glass microbeads can be added to composites to make the articles flame retardant while • reducing the weight of the material. This is particularly useful in maritime use, because lowering the weight of a ship can increase pay load capacity.
  • the fiber glass is thermoplastic coated fiber glass.
  • the source of between about 10% and 500% by weight of the thermoplastic -coated fiber glass component based on the weight of the fiber glass component is fiber gf ass-reinforced HOPE, PE, PP t LDPE or mixtures of two or more thereof, which is also the source of between about 50% arid about 75% by weight of the pol ymer component based on the weight of the polymer component.
  • the composite article has a modulu greater than 150,000 psi and an ultimate strength greater than 3000 psi. Preferred embodiments have a modulus greater than about 1.60,000 psi and an ultimate strength greater than about 3600 psi.
  • the present invention provides a corrugated panel thennoformed from a panel containing a polymer component and.
  • the polymer component contains between about 80% and about .100% by weight of HOPE based on the weight of the polymer component, in which at least about 20% or more by weight of said HDPE is post- consumer HDPE.
  • the present invention provides an embossed panel therraoiorraed from a panel containing a polymer component and optionally distributed therein between about 1 % and about 45% by weight of a glass bead or fiber reinforcing component based on the weight of the finished panel wherein the polymer component contains between about 80% and about 100%: by weight of HDPE based on the weight of the polymer component, in which at least about 20% or more by weight of said HDPE is post- consumer HDPE.
  • the present, invention provides a boat or aircraft hull. themiofbrmed from, a panel containing a polymer component and optionall distributed therein between about 1% and about 45% b weight of a glass bead or fiber reinforcing component based on the weight of the finished composite panel, wherein the polymer component contains between about 80% and about 100 wt.,% of HDPE based on the weight of the polymer component, i which at least about 20% or more by weight of said HDPE is post-consumer HDPE.
  • the present invention provides a reaction vessel thermoformcd from a panel containing a polymer component and optionally distributed therein between about 1% and about 45% by weight of a glass bead or fiber reinforcing component based on the weight of the .finished composite panel, wherein the polymer component contains between about 80% and about 1.00% by weight of HDPE based on the weight of the polymer component, in which at least about 20% or more by weight of said HDPE is post- consumer HDPE.
  • the present invention provides a laminate of two panels sandwiching a third polymer layer.
  • the two panels are up to about. 30 mm thick, and the middle layer is up to about 1 0 mm thick.
  • the two panels are between about 1 to about 12 mm thick and the middle layer is between about 1 and about 50 rani thick, in anothe embodiment, the two panels are about 2 to about 9 mm thick and the middle layer is between about 20 and about 40 mm thick.
  • two composite panels are about 3 to about 6 mm thick and the middle layer is between about 25 and about 35 mm thick
  • the third polymer layer is a polymer foam.
  • the laminate can be dimensioned for and. used as a truck or trailer bed, interior and exterior building wails, temporary structures, and the like.
  • thermoforming is a manufacturing process where a plastic sheet is heated to a pliable forming temperature, formed to a specific shape in a. moid, and trimmed to create a usable product.
  • the sheet, or "film” when referring to thinner gauges and certain material types, is heated in an oven to a high-enough temperature that it can be stretched into or onto a moid and cooled to a finished shape.
  • the present invention provides a solar panel comprising a plurality of solar cells disposed in a single layer on the surface of a panel containing a polymer component and optionally distributed therein between about 1 and about 45% by weight of a glass bead or fiber reinforcing component based on the weight of the finished composite panel, wherein the polymer component contains between about 80% and about: I 00% b weight of HDPE based on the weight of the polymer component, in which at least about 20% or more by weight of said HOPE is post-consumer HDPE.
  • the present invention provides a building integrated photovoltaic device comprising the solar panel described above.
  • the building integrated photovoltaic device is a roofing panel or shingle or a building facade panel.
  • a person of ordinary skill in the. art would recognize how to fomi the panels of the invention into these articles by using common knowledge or techniques known in the field, for example, by modifying the compression mold to obtain desired dimensions or shape of the panel, or by resizing or reshaping it after it is formed.
  • the present invention provides a method of making a plastic article comprising the steps of:
  • the cavity is a square or rectangular cavity and the plastic article is a plastic composite panel.
  • the mixed melt is formed in an extruder.
  • the extruder is a twin scre w ex truder.
  • the extruder is a single screw compounding extruder.
  • Preferred single screw compounding extruders include a Mode! Taskmaster 1000 single screw compounding extruders manufactured by Raadcastle Extrusion Systems, inc. of Cedar Grove, Hi,
  • Plastic materials and glass fibers in a desired weight ratio are introduced via hopper 10 into an extruder, 50, in which the plastics are melted and mixed with the glass fibers.
  • the mixed melt is extruded into an accumulator, 52, from which the mixed melt is pushed into a mold, 12, through a conducting pipe by a piston, 55.
  • the mixed me!t is pressed or molded into a desired shape of composite article and subsequently cooled down tor release and/or for further processing.
  • a free radical initiator can also be incorporated into the mixture of plastic materials and glass fibers, vide infra.
  • the mixed melt is delivered from an extruder to a heated vessel until a quantity of the mixed melt sufficient to form a composite plastic article accumulates, after which the quantity is delivered to the cavity of the forming die.
  • the HOPE polymer component can be obtained from virgin materials, it is preferably obtained from recycled plasties. European scrap contains mixtures of HDPE contaminated with medium and low density PE, even though the scrap i labeled HDPE, containing little to no glass fiber, thus producing articles having a 130,000 psi modulus and lower and ultimate strength of 2000-2500 psi. Adding glass fiber or beads will not sufficiently raise the ultimate strength or modulus for structural applications.
  • a free radical initiator is added to the melt mixture during compounding in the manufacturing process.
  • An olefin monomer such as maleic anhydride, or a vinyl monomer, such as sryrene or divinyl benzene, can also be added to graft-polymerize onto or cross-link with the polyethylene chain to enhance modulus and tensile strength. It also increases the polarit of the polymer to the extent that the shear stress between any glass present and the polymer matrix is increased, which further contributes to increasing the modulus and ultimate strength of the formulation, even with lower aspect ratio fibers.
  • the addition of the olefin or vinyl monomer also serves to couple the glass fiber to the polymer phase in the composite material, which also contributes to improvement of the modulus and ultimate strength of articles formed form the composition, it should be noted, however, that the addition of free radical initiator and optional grafting or cross- linking monomers will improve the mechanical performance of recycled HOPE contaminated with lower density polyethylene even when glass fibers are not used.
  • Suitable free radical initiators include, but are not limited to, organic peroxides, for example, di-tert-butyl peroxide (tBuOOtBit), di enzoyl peroxide ((PhCOO) ? .) and dicorayl peroxide.
  • Suitable monomers as grafting or cross-Unking monomers also include, but are not limited to, olefins in general, and oiefhiic acid aniiydrtdes in particular, such as nia!eic anhydride, as well as vinyl monomers such as styrene, divinyl benzenes, and the like.
  • Suitable combinations of dicumyl peroxide and maleic anhydride for the present invention are commercially available.
  • the polymer component contains up to about 20% by weight, based on the weight of the polymer component, of at least one post-consumer polymer selected from PE, PP and LDPE, and the method further includes the step of adding to the polymer component, prior to the formation of the mixed melt, an amount of a radical initiator effective to provide a composite plastic article with a modulus greater than 150,000 psi.
  • the amount of free radical initiator added is effective to provide a modulus greater than 160,000.
  • the actual amount of radical initiator will vary with the waste stream and depend upon the extent to which the waste stream is contaminated with LDPE, with higher levels of LDPE re uiring more radical initiator. If too little is used, the resulting blend will have inadequate mechanical properties. If too m uch is used, the resulting blend will over-crosslink and not be thermoplastic. Nevertheless, additional embodiments of the present invention are envisioned in which the product is cross-linked beyond thermoplastic.
  • an improvement in modulus and ultimate strength is obtained with the addition of as little as 100 ppm of free radical initiator, in one embodiment, between about 0.05 and about 0.5 wt% of the radical initiator is used. In another embodiment, between about 0.1 and about 0.25 wt% of the radical initiator is used.
  • recycled HDPE containing lower density polyethylene is mixed with glass beads or fibers, to which an olefin or vinyl monomer such as maleic anhydride, styrene or divinyl benzene and a free radical initiator such as dieurayl peroxide arc added.
  • the mixed melt is formed in an extruder and the radical .initiator is added to the extruder.
  • the extruder residence time shou!d be sufficient to produce a composite material with an acid number less than 8, as determined by AST D 1386.
  • a residence time sufficient to produce an acid number less the 4 is preferred, with a residence time sufficient to produce an acid number less that one being even more ⁇ preferred. This will vary depending upon the waste stream and equipment but can be determined by one of ordinar skill in the art without undue experimentation.
  • This aspect of the present invention can be applied to essentially any method of compounding recycled HDPE.
  • free radical initiators and optional grafting or cross-linking monomers can be used when compounding the glass fiber-reinforced polystyrene-polyolefm composites of U.S. Patent No. 5,298,214, or when compounding the glass fiber-reinforced HDPE building materials and railroad ties of U.S. Patent No. 5,789,477.
  • the free radical initiators and optional grafting or cross-linking monomers can also be used when compounding the giass fiber- reinforced polymer composite railroad ties and structural building forms containing HDPE and other optional polymers disclosed by U.S. Patent Nos. 6, 191 ,228; 7,01 1,253, 7,795,329, 7,996.945 and 8,008,402.
  • the 7.996.945 patent discloses polymeric structural building beams, including I-beams, C-beam and T-beams. The disclosures of all of these patents are incorporated herein by reference.
  • the free radical initiators and optional grafting or c oss-linking monomers can also be used when compounding the glass fiber-reinforced polymer composite railroad ties, marine pilings structural beams, telephone poles, blocks, beams, boards, sheets, panels and the like containing HDPE and other optional polymers disclosed by U.S. Patent Publication Nos. 20050192403; 20090242655. 20100319144, 20110143058, 201 10265410, 201 10294917 and 20130008973.
  • the polymer component of the mixed melt includes between about 90% and about 100% HDPE by weight.
  • 100% of the HDPE in the polymer component is post-consumer HOPE, in another embodiment of this aspect, 100% of the polymer component is post-consumer polymers.
  • the mixed melt further contains up to about
  • the glass bead or fiber reinforcing component is present in an amount between about 10% and about 30% by weight based on the weight of the mixed melt. In another embodiment the glass bead or fiber reinforcing component in present in an amount that is about 15% to about 25% by weight based in the weight of the mixed melt.
  • the fiber component has a minimum length of 0.1 mm.
  • the fiber component comprises torrefied wood, rock wool or fiber glass.
  • a corona discharge device or an electron beam curing device is installed at the end of the process line to treat all output sheets to improve the adhesion of paints, coatings, foils and laminating.
  • the method further contains the step of theimoforming the plastic panel into finished article, in anothe embodiment of this aspect, the finished article is selected from a corrugated panel, an embossed panel, a boat hull, an aircraft hull, an automotive frame and a reaction vessel.
  • the present invention provides a method of recycling a post- consumer plastic waste, the method comprises the steps of:
  • HDPE 80% and about 100% by weight
  • the mixed melt is delivered from the extruder to a heated vessel until a quantity of the mixed melt sufficient to form a composite plastic article accumulates, after which the quantity is delivered to the cavity of the forming die.
  • the polymer component of the mixed melt includes between about 90% and about 100% HDPE by weight.
  • 100% of the HDPE in the polymer component is post-consumer HDPE.
  • 100% of the polymer component is -post-consumer polymers.
  • the glass bead or fiber reinforcing component is present in an amount between about 10% and about 30% by weight based on the weight of the mixed meit ... In another embodiment the glass bead or fiber reinforcing component in present in art amount between about 15% and about 25% by weight based in the weight of the mixed melt.
  • the fiber component has a minimum length of 0.1 mm.
  • the fiber component comprises torrefied wood, rock wool or fiber glass.
  • a corona discharge device or an electron beam curing device is installed at the end of the process iine to treat all output sheets to improve the adhesion of paints, coatings, foils and laminating.
  • the method further contains the step of theratof raiing the plastic panel into a finished article, in another embodiment of this aspect, the finished article is selected from a corrugated panel, an embossed panel, a boat hull, an aircraft hull, an automotive frame and a reaction vessel.
  • the HDPE fraction comprises up to about 20% by weight, based on the weight of said HDPE fraction, of at least one post-consumer polymer selected from PE, PP and LDPE, and the method further includes the step of adding to said HDPE fraction, prior to the formation of said mixed melt, an amount of a radicai initiator effective to provide a composite plastic article with a moduius greater than 150,000 psi.
  • the radical initiator is added in an amount efieciive to provide a composite article with a modulus greater than about 1 0,000 psi.
  • the mixed melt is formed in an extruder and said radicai initiator is added to said extruder.
  • the free radicai initiator is an organic peroxide.
  • the organic peroxide is selected from di benzoyl peroxide, dicura l peroxide and di-t- butyl peroxide.
  • an olefin monomer capable of graft polymerization onto a polyethylene is added to said polymer component with the radical initiator.
  • the olefin monomer is rnaleic anhydride.
  • the present invention provides a method of increasing the moduius of a recycled plastic article formed from a mixed melt comprising a post- consumer HDPE polymer component containing an amount of one or more polymers selected from PE, PP and LDPE that is sufficient to reduce tire modulus of the article below ⁇ 50,000 psi, wherein the method adds to the HDPE polymer component, prior to the formation of the mixed melt, an amount of a radical initiator effective to pro vide an article with a modulus greater than 150,000 psi.
  • the radical initiator is an organic peroxide.
  • the organic peroxide is selected from di ' benzoyl peroxide, dicumyl peroxide and di-t-bittyl peroxide.
  • an olefin monomer capable of graft polymerization onto a polyethylene is added to said polymer component with said radical initiator.
  • the radical initiator is added in an amount effective to provide composite article with a moduius greater than about .560,000 psi.
  • the mixed melt further contains up to about 20% by weight, based on the weight of the polymer component, of at least one post- consumer polymer selected from ' PE, PP and LDPE,
  • the glass bead or fiber reinforcing component is present in an amount between about 20% and about 30% by weight based on the weight of the mixed melt. In another embodiment the fiber component in present in an amount that is about 25% by weight based in the weight of the mixed melt.
  • the fiber component has a minimum length of 0.1 mm.
  • the fiber component comprises torrefied wood, rock wool or fiber glass,
  • a corona discharge device or an electron beam curing device is installed at the end of the process line to treat all output sheets to improve the adhesion of paints, coatings, f oils and laminating.
  • the method further contains the step of thennoforoiing the plastic panel into a finished article.
  • the finished article is selected from a corrugated panel, an embossed panel, a boat hull, an aircraft hull, an automotive frame and a reaction vessel .
  • the composite in addition to the polyolefio and glass bead or fiber reinforcing components, the composite ma contain further additives.
  • the material used to make the composite ca contain small amounts of a blowing agent to reduce the number and size of voids formed within the material during cooling.
  • the amount of can be, for example, less than 0.3 wt. %, e.g., about 0.03 wt. %.
  • the blowing agent e.g., azidocarbonamide
  • other foaming agents or gases can be directly metered into the extruder.
  • Conventional compounding additive can also be combined with the polymers) prior to extrusion.
  • Suitable additives for the composite articles include pigments, UV resistant agents, colorants (such as carbon black), modifiers, fillers, particles, and the like.
  • the polymer component and an glass beads or fibers, together with any additives are fed to the barrel of the extruder in solid form with optional free radical initiator and olefin monomer at about 180-220 °C and 80 rpm or greater, with pressure depending on the die.
  • the melt mixture can be continuously extruded into the accumulator.
  • the accumulator stores hot compounded plastic and the optional glass beads or fibers and fills to the desired volume required to fill the mold. This allows all of tire plastic to be molded to be deposited in the open mold over a ver short period of time (a few seconds), to prevent air cooling, and allow a smaller extruder to be used than would otherwise be required.
  • the capacity of the accumulator can be adjusted depending on need, which can be 30-35 lbs, for example.
  • the accumulator ensures orientation of the fiber glass to be planar but not axial thus avoiding the one directional orientation and becoming harder to propagate cracks. As known in the art, one-directional orientation of fibers would be easy to break or crack.
  • the size and shape the plastic composite sheets can be adjusted depending on applications.
  • the sheets can be rectangular having a 4 ⁇ 8 (fr) dimension, with 8 mm thickness.
  • the length and width dimensions are determined by die dimensions of the die cavity of the compression mold, and the thickness is determined by the depth or volume of the die cavity and the amount of melt mixture added to the die, both of which can be modified based on need.
  • Compression molding further avoids single-directional orientation of fiber, Non- unidirectional orientation is also achieved by using a single-screw compounding extruder such as a Randeastle mixing device, which allows modulation of fiber glass levels, as disclosed in US Patent Application 13/454,035, filed April 23, 20.12, the disclosure of which is hereby incorporated by reference.
  • This application discloses a " method of just in time compounding in which extruder-compounded compositions are directly fed to molding equipment.
  • the panels of the present invention has wide applications, for example, in building constructions, such as roofing, floor tiles, exterior and interior fini hing products & siding, ceiling tiles, and shingles.
  • the articles of the present invention are resistant to attack by microbes and insects and thus do not. require expensive chemical treatments. Also the material is resistant, to degradation from exposure to ultraviolet light as well as damp, freezing conditions,
  • FG fiberglass
  • d 20 microns.
  • L :::: 4 mm.
  • Recycled plastics include those containing high density polyethylene (MDPE) as the main component, for example, milk bottles, car bumpers, etc.
  • MDPE high density polyethylene
  • flat panel materials.
  • “flat atter” means a piece of material, ha ving considerable extent of surface; usually a rectangular p iece of greater length than breadth, and distinguished by its thinness; being more than 4 inches in width and not more than 2.5 inches in thickness.
  • the sheet product is used in a variety of situations, and in many different scctoi's. This includes, but is not limited to, construction site hoardings, signage, concrete shuttering, rain cladding, cubicle partitions, pipe boxing, sound barriers (acoustic barriers etc.), and potential replacement for internal skin of walls, ceilings & flooring-
  • a corona treatment process and/or Electron Beam Curing process is installed at the end of the process Hue to treat all output sheets to improve the adhesion of paints, coatings, foils and laminating.
  • the compact grade alternative product is used for, but not limited to, laboratory furniture, lockers, external building cladding and washroom cubicles.
  • Stage 1 Recycled HDPE Granulate was blown into fabric silos.
  • Stage 2 Recycled HDPE from several sources was mixed to average out inconsistencies in supplied material.
  • Stage 3 Material was blended with additional Glass Fiber, Carbon Black and additives.
  • Stage 4 Single Screw Extrusion - L/d 36: 1 circa 1.20 mm diameter 350 kg output.
  • a screw of varying pitch and diameter was used to create conditions of shear, heat and pressure within the extruder.
  • a vented extruder was used to allow vo!atiles, such as steam, to be removed from the plastic melt
  • a water chiller unit was provided to supply temperature regulated cooling water to
  • Stage 5 MasifoldAecumulator Stores molten polymer between dispense cycles.
  • I S heater bands where die molten material was stored until sufficient quantity accumulated to fill a mold tool cavity, when it was then discharged through a port using a pneumatically operated piston.
  • the mold tools traversed around a conveyor line.
  • the control system pre-set the output and duration of the Infra Red pre-heater and synchronized the movement of the tool into preheating.
  • Stage 7 Maoifold/Acciunu!ator dispensed measured charge weight into waiting open tool.
  • Stage 9 Filled tool moved to heated press. • The lower half of each tool was then mated with the top half and moved into a heated press where the moftea plastic was squeezed between the top and lower tool halves until the tool is fully closed.
  • Stage 1 Filled tool moved to cooling conveyor
  • die tool was moved, to a cooling conveyor where it was cooled using ambient air, fans and water spray.
  • Stage 12 Product removed from tool, de-flashed.
  • Stage 3 Product corona tea ted to improve surface, and packed
  • a structural sheet composite was formulated from fiberglass-reinforced recycled
  • the recycled HDPE used for this study was "British Recycled HDPE” (B - HDPE), and the fiberglass was John Maaville 4mm chopped strand glass fibers (glass fiber).
  • DuPontTM Fusabond& P353 (Fusabond), with a peroxide and ma!eic anhydride was used to assist in adjusting the mixed PE to become more like HDPE and improve the ftmcHonalization of the BR-HDPE.
  • BR-HDFE was ground in a Nelrnor Bulk Granulator to a 1 ⁇ 2" or smaller size, then dried at 186° F for 2 hours prior to processing, since the. sample was moist.
  • Weight percentages of ?i% BR-HDPE, 25% glass fiber, and 4% Pusabond& > were dry mi ed together in several small 100 gram batches, shaken for one minute to promote consistent mixing, and consecutively fed into the hopper of a Negri Bossi 50 tonne
  • the fed batches were processed in the injection Molding Machine at 450'' F as described in Figure 1, with an injecting pressure of 600 psi.
  • the specimens produced had an average dimension according to Figure I f(T) - 3.55 mm, (W) ⁇ 12,44 mm, (L) ⁇ 126 mm).
  • the produced specimens were allowed to normalize for 24 hours then mechanical testing was carried out on a TS QTest 25 Universal test apparatus in accordance with ASTM D790 (F!exural testing mode).
  • the mode testing conditions were done at a span of 54 mm and a strain rate of 1.42 mm min. it will be understood by those of skill in the art that numerous and various modifications can be made without departing from the spirit of the present invention.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Reinforced Plastic Materials (AREA)

Abstract

L'invention concerne des articles moulés par compression contenant un composant polymère à l'intérieur duquel est éventuellement réparti un composant de renforcement par fibres ou billes de verre dans une proportion d'environ 1 % à environ 45 % en poids, sur la base du poids de l'article composite fini, lequel composant polymère contient entre environ 80 % et environ 100 % en poids de polyéthylène haute densité (PEHD), sur la base du poids du composant polymère, au moins environ 20 % en poids ou plus dudit PEHD étant du PEHD recyclé après consommation. L'invention concerne par ailleurs des panneaux en plastique, leurs utilisations et leurs procédés de fabrication.
PCT/US2013/072851 2012-12-04 2013-12-03 Articles composites moulés par compression à partir de plastique recyclé WO2014089062A1 (fr)

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US13/826,969 2013-03-14
US13/803,744 2013-03-14
US13/826,969 US9422423B2 (en) 2012-12-04 2013-03-14 Composite articles compression molded from recycled plastic
US13/803,744 US20140154349A1 (en) 2012-12-04 2013-03-14 Apparatus for thermoforming polymer composite panels

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018068159A1 (fr) * 2016-10-14 2018-04-19 Sociedad Comercial Harut Spa Procédé pour le recyclage de matériaux de polyéthylène haute densité (hdpe) par thermofusion et produits de hdpe recyclé

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5789477A (en) * 1996-08-30 1998-08-04 Rutgers, The State University Composite building materials from recyclable waste
US20100016515A1 (en) * 2007-02-05 2010-01-21 Chaudhary Bharat I Crosslinkable polyethylene composition, method of making the same, and articles made therefrom

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5075051A (en) * 1988-07-28 1991-12-24 Canon Kabushiki Kaisha Molding process and apparatus for transferring plural molds to plural stations
US6367765B1 (en) * 1999-09-09 2002-04-09 Klaus A. Wieder Mold vent
US20020147244A1 (en) * 2001-03-07 2002-10-10 Kishbaugh Levi A. Injection-molded crystalline/semicrystalline material
JP2010228225A (ja) * 2009-03-26 2010-10-14 Fujitsu Ltd 成形装置及び成形方法
JP5613442B2 (ja) * 2010-04-21 2014-10-22 キョーラク株式会社 表皮付きパネルの成形方法、表皮付きパネル

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5789477A (en) * 1996-08-30 1998-08-04 Rutgers, The State University Composite building materials from recyclable waste
US20100016515A1 (en) * 2007-02-05 2010-01-21 Chaudhary Bharat I Crosslinkable polyethylene composition, method of making the same, and articles made therefrom

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018068159A1 (fr) * 2016-10-14 2018-04-19 Sociedad Comercial Harut Spa Procédé pour le recyclage de matériaux de polyéthylène haute densité (hdpe) par thermofusion et produits de hdpe recyclé
EP3527345A4 (fr) * 2016-10-14 2020-06-17 Sociedad Comercial Harut Spa Procédé pour le recyclage de matériaux de polyéthylène haute densité (hdpe) par thermofusion et produits de hdpe recyclé
RU2735016C1 (ru) * 2016-10-14 2020-10-27 Сосьедад Комерсиаль Арут Спа Способ регенерации материала из полиэтилена высокой плотности (пэвп) путем термического сплавления и регенерированные продукты из пэвп
US11000974B2 (en) 2016-10-14 2021-05-11 Sociedad Comercial Harut Spa Method for recycling high-density polyethylene (HDPE) material by thermofusion and recycled HDPE products
AU2021201344B2 (en) * 2016-10-14 2023-02-16 Sociedad Comercial Harut Spa Method for recycling high-density polyethylene (HDPE) material by thermofusion and recycled HDPE products

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