WO2013016786A1 - Geomembrane produced from mixtures of high-density polyethylene, low density linear polyethylene and low density polyethylene - Google Patents

Geomembrane produced from mixtures of high-density polyethylene, low density linear polyethylene and low density polyethylene Download PDF

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Publication number
WO2013016786A1
WO2013016786A1 PCT/BR2011/000368 BR2011000368W WO2013016786A1 WO 2013016786 A1 WO2013016786 A1 WO 2013016786A1 BR 2011000368 W BR2011000368 W BR 2011000368W WO 2013016786 A1 WO2013016786 A1 WO 2013016786A1
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WIPO (PCT)
Prior art keywords
polyethylene
produced
density polyethylene
low density
geomembrane
Prior art date
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PCT/BR2011/000368
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French (fr)
Portuguese (pt)
Inventor
Antônio Sérgio HURTADO
Original Assignee
Neo-Plástic Embalagens Plásticas Ltda, Cnpj/Mf
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Application filed by Neo-Plástic Embalagens Plásticas Ltda, Cnpj/Mf filed Critical Neo-Plástic Embalagens Plásticas Ltda, Cnpj/Mf
Priority to MX2014001415A priority Critical patent/MX2014001415A/en
Publication of WO2013016786A1 publication Critical patent/WO2013016786A1/en

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    • 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
    • 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
    • C08L23/08—Copolymers of ethene
    • C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
    • C08L23/0815—Copolymers of ethene with aliphatic 1-olefins

Definitions

  • geosynthetic is used to describe a family of synthetic products used to solve geotechnical problems.
  • the synthetic nature of these products makes them suitable for use on earthworks where a high level of durability is required.
  • Geomembrane is one of the most common types of geosynthetics and consists of a flexible, elastic plastic alloy blanket.
  • the most common types are made of polyethylene - PE or polyvinyl chloride - PVC. They have excellent performance when used as a waterproof coating and may have various applications in waterproofing, thus preserving the environment avoiding contamination of soil, groundwater and nearby tributaries.
  • the geomembrane In mining the geomembrane is used as a soil coating on the bases of the leach piles, in the channels that carry the leached liquid, in the storage lakes of this liquid and in the evaporation ponds. It can also be used in waterproofing the evaporation tanks of lithium mines and in processes in gold and copper mines.
  • the geomembrane in civil engineering is used to construct irrigation canals and dikes, as well as being used for waterproofing storage tunnels, slabs and ponds.
  • the geomembrane in fish farming is perfect for waterproofing fish breeding ponds without risk to the environment.
  • the geomembrane also serves as a waterproof coating in landfills.
  • the geomembrane In agriculture the geomembrane can be used in the construction of manure containment traps. It can also be used as a cover to capture the gas generated for energy purposes.
  • Patent document PI0701720-0 filed 05/18/2007 entitled Improvement introduced in geomembrane winder teaches a main body formed from a winder with conductor and organizer arms, which are positioned at the ends constituted from several phalanges, being the lower one is positioned statically, while the adjacent phalanges are articulated and provided transversely on their inner face with coupling channels, while the outer face receives gears, and the conductor arms are formed by several phalanges and the static is positioned in the lower section.
  • articulated phalanges fitted with toothed pulleys which, by means of synchronizing belts, promote the interconnection of the phalanges
  • said conductive arms being further provided with pneumatic movement cylinders equipped with computer controlled automatic bleed devices, with the conductive arms being connected. s to the organizing arms through steering beams.
  • Patent document MU 8002650-8 filed 13/10/2000 entitled Multilayer geomembrane manufacturing process utilizes the coating system to join the three fabric, film and coating components together. Depending on the number of layers required in the geomembrane, the geomembrane is sometimes returned to the inlet of the coating process and receives on the other side of the fabric a coating layer and a film.
  • Patent Document PI0205038-2 filed 10/04/2002 entitled Double Bottom Surface Storage Tanks Petroleum and Liquid Hydrocarbons teaches a concrete tank, equipped with a generic floating roof, formed by the side and a circular shoe resting on the ground, both reinforced concrete or prestressed concrete depending on the capacity of the tank, equipped with a generic floating roof characterized by the structure.
  • the double bottom composed of the inner bottom and the outer bottom, both formed by a polymeric, preferably polyolefin, or similar geomembrane; the two separate drainage systems for underground water abstraction that drains through the drains, and for oil / liquid hydrocarbons flowing through the drains; by the generic support structure of the double bottom and the drainage systems made up, from the bottom up, the subgrade, compacted drainage layer for underground water collection, compacted soil layer, geotextile-covered outer bottom, polymeric blanket or the like. , oil / liquid hydrocarbon drainage layer, compacted soil layer, asphalt primed compacted aggregate base, flexible bituminous coating and geotextile-coated inner floor, polymer blanket or the like.
  • the goal is to generate a material produced through a renewable source.
  • polyethylene production processes consume a lot of energy.
  • the polyethylene produced through sugarcane generates energy by burning enough bagasse to operate the plant and still has a quantity left over.
  • the sugarcane photosynthesis process consumes C0 2 from the environment. For each kg of polyethylene produced, about 2 kg of CO2 is consumed from the environment. That is, this geomembrane is also a sustainable product.
  • the geomembrane object of the present invention is produced with sugarcane polyethylene obtained by the balloon and plan / cast production processes. However, it will be produced from renewable source polyethylene thus contributing to the environment.
  • the geomembrane object of the present patent is obtained by the extrusion process using a mixture of the following materials:
  • LLDPE linear low density polyethylene produced from ethylene obtained from sugarcane alcohol
  • LDPE low density polyethylene Black master batch containing carbon black and anti-oxidant and anti-UV additives.

Abstract

The present invention pertains to the field of chemicals produced from polyethylene from sugar cane by blow-moulding and casting production processes. However, it is produced with polyethylene from a renewable source, and is thus environmentally friendly. The claimed geomembrane is obtained by an extrusion process with a mixture of the following materials: HDPE - high-density polyethylene produced from ethylene from sugar cane alcohol; LDLPE - low-density linear polyethylene produced from ethylene from sugar cane alcohol; LDPE - low-density polyethylene; black master batch containing soot, anti-oxidising and anti-U.V. additives. The quantity of the first two materials mentioned produced from ethylene from a renewable source amounts to more than 75%, and the product is thus environmentally friendly.

Description

GEOMEMBRANA PRODUZIDA COM MISTURAS DE  GEOMEMBRANE PRODUCED WITH MIXTURES OF
POLIETILENO DE ALTA DENSIDADE, POLIETILENO LINEAR DE BAIXA DENSIDADE E POLIETILENO DE BAIXA DENSIDADE"  HIGH DENSITY POLYETHYLENE, LOW DENSITY LINEAR POLYETHYLENE AND LOW DENSITY POLYETHYLENE "
Trata o presente relatório descritivo da patente de invenção de uma inédita geomembrana produzida com misturas de polietileno de alta densidade, polietileno linear de baixa densidade e polietileno de baixa densidade, notadamente um produto utilizado em diversos ramos da engenharia civil, de concepção inovadora e dotado de importantes melhoramentos tecnológicos e funcionais, segundo os mais modernos conceitos de engenharia química e de acordo com as normas e especificações exigidas, revestindo-se de características próprias e dotadas com requisitos fundamentais de novidade e atividade inventiva, fazendo resultar uma série de reais e extraordinárias vantagens técnicas, práticas e económicas.  This patent specification report is on a novel geomembrane made from mixtures of high density polyethylene, low density linear polyethylene and low density polyethylene, notably a product used in various branches of civil engineering, of innovative design and endowed with important technological and functional improvements, according to the latest chemical engineering concepts and in accordance with the required standards and specifications, having their own characteristics and endowed with fundamental requirements of novelty and inventive activity, resulting in a series of real and extraordinary advantages. technical, practical and economic
O termo geossintético é usado para descrever uma família de produtos sintéticos utilizados para resolver problemas em geotecnia. A natureza sintética desses produtos os tornam próprios para uso em obras de terra onde um alto nível de durabilidade é exigido.  The term geosynthetic is used to describe a family of synthetic products used to solve geotechnical problems. The synthetic nature of these products makes them suitable for use on earthworks where a high level of durability is required.
Esses produtos são constituídos por uma grande variedade de materiais e formas, cada um adequado a um determinado uso ou necessidade. Em geotecnia as principais obras que utilizam esses materiais são: canais de irrigação, mineração, aterros, estruturas de contenção, reservatórios, canais e barragens.  These products are made up of a wide variety of materials and shapes, each suited to a particular use or need. In geotechnics the main works using these materials are: irrigation canals, mining, landfills, containment structures, reservoirs, canals and dams.
Geomembrana é um dos tipos mais comuns de geossintéticos e consiste-se em uma manta de liga plástica, elástica e flexível. Os tipos mais encontrados são fabricados com polietileno - PE ou policloreto de vinila - PVC. Apresentam excelente performance quando utilizada como revestimento impermeabilizante podendo ter diversas aplicações em impermeabilização, preservando desta forma o meio ambiente evitando contaminação do solo, lençóis freáticos e afluentes próximos. Geomembrane is one of the most common types of geosynthetics and consists of a flexible, elastic plastic alloy blanket. The most common types are made of polyethylene - PE or polyvinyl chloride - PVC. They have excellent performance when used as a waterproof coating and may have various applications in waterproofing, thus preserving the environment avoiding contamination of soil, groundwater and nearby tributaries.
Na mineração a geomembrana é usada como revestimento do solo nas bases das pilhas de lixiviação, nas canaletas que transportam o líquido lixiviado, nos lagos de armazenamento desse líquido e nas lagoas de evaporação. Também pode ser utilizada na impermeabilização dos tanques de evaporação das minas de lítio, e em processos nas minas de ouro e cobre.  In mining the geomembrane is used as a soil coating on the bases of the leach piles, in the channels that carry the leached liquid, in the storage lakes of this liquid and in the evaporation ponds. It can also be used in waterproofing the evaporation tanks of lithium mines and in processes in gold and copper mines.
A geomembrana na engenharia civil é usada para construir canais de irrigação e diques, além de ser aplicada na impermeabilização de túneis, lajes e lagoas de armazenamento.  The geomembrane in civil engineering is used to construct irrigation canals and dikes, as well as being used for waterproofing storage tunnels, slabs and ponds.
A geomembrana na piscicultura é perfeita para a impermeabilização de lagoas de criação de peixes, sem riscos ao meio-ambiente.  The geomembrane in fish farming is perfect for waterproofing fish breeding ponds without risk to the environment.
A geomembrana serve também como revestimento impermeabilizante em aterros sanitários.  The geomembrane also serves as a waterproof coating in landfills.
Na agricultura a geomembrana pode ser usada na construção de esterqueiras de contenção dos dejetos oriundos de criação animal. Também pode ser usada como cobertura para captação do gás gerado para fins energéticos.  In agriculture the geomembrane can be used in the construction of manure containment traps. It can also be used as a cover to capture the gas generated for energy purposes.
Como é do conhecimento dos técnicos no assunto, os produtos disponíveis atualmente produzidos com polietilenos convencionais são obtidos de fontes finitas. Atualmente já existe geomembrana produzida de polietileno. No entanto não existe geomembrana produzida por meio de polietileno obtido por meio da cana-de-açúcar. Os polietilenos utilizados atualmente para produção de geomembrana são obtidos por meio da nafta ou de gás.  As is known to those skilled in the art, currently available products made from conventional polyethylenes are obtained from finite sources. There is already a geomembrane produced from polyethylene. However, there is no geomembrane produced from polyethylene obtained from sugar cane. The polyethylenes currently used for geomembrane production are obtained by naphtha or gas.
Neste sentido alguns inventores idealizaram os produtos objeto dos documentos de patentes abaixo indicadas, porém não atentaram para o fato da preservação do meio ambiente. In this sense some inventors idealized the products object of the patent documents below, but did not pay attention to the fact of the preservation of the
ESTADO DA TÉCNICA  TECHNICAL STATE
O documento de patente PI0701720-0 depositado em 18/05/2007 intitulado aperfeiçoamento introduzido em bobinadeira de geomembrana ensina um corpo principal formado a partir de uma bobinadeira dotada de braços condutores e organizadores, estes posicionados nos extremos constituídos a partir de diversas falanges, sendo a inferior posicionada de forma estática, enquanto as falanges adjacentes são articuladas e dotadas transversalmente, em sua face interna, de canais acopladores, enquanto a face externa recebe engrenagens, sendo que os braços condutores são formados por diversas falanges sendo a estática posicionada na secção inferior seguida por falanges articuláveis dotadas de polias dentadas que promovem, através de correias sincronizadoras, a interligação das falanges, sendo os ditos braços condutores providos ainda de cilindros pneumáticos de movimentação dotados de dispositivos de sangria automática de ar comandados por computador, sendo os braços condutores ligados aos braços organizadores através de vigas direcionadoras.  Patent document PI0701720-0 filed 05/18/2007 entitled Improvement introduced in geomembrane winder teaches a main body formed from a winder with conductor and organizer arms, which are positioned at the ends constituted from several phalanges, being the lower one is positioned statically, while the adjacent phalanges are articulated and provided transversely on their inner face with coupling channels, while the outer face receives gears, and the conductor arms are formed by several phalanges and the static is positioned in the lower section. followed by articulated phalanges fitted with toothed pulleys which, by means of synchronizing belts, promote the interconnection of the phalanges, said conductive arms being further provided with pneumatic movement cylinders equipped with computer controlled automatic bleed devices, with the conductive arms being connected. s to the organizing arms through steering beams.
O documento de patente MU 8002650-8 depositado em 13/10/2000 intitulado processo de fabricação de geomembrana multicamada utiliza o sistema coating para unir os três componentes tecido, filme e coating. Dependendo da quantidade de camadas necessárias na geomembrana, esta retorna outras vezes à entrada do processo de coating e recebe do outro lado do tecido uma camada de coating e um filme.  Patent document MU 8002650-8 filed 13/10/2000 entitled Multilayer geomembrane manufacturing process utilizes the coating system to join the three fabric, film and coating components together. Depending on the number of layers required in the geomembrane, the geomembrane is sometimes returned to the inlet of the coating process and receives on the other side of the fabric a coating layer and a film.
O documento de patente PI0205038-2 depositado em 04/10/2002 intitulado tanques de superfície com fundo duplo para armazenamento de petróleo e hidrocarbonetos líquidos ensina um tanque de concreto, equipado com teto flutuante genérico, formado pelo costado e sapata circular assente sobre o terreno, ambos de concreto armado ou concreto protendido em função da capacidade do tanque, equipado com teto flutuante genérico caracterizado pela estrutura monolítica tubular com passagens na sapata para os drenos; pelo fundo duplo composto pelo fundo interno e pelo fundo externo, ambos formados por geomembrana polimérica, preferencialmente poliolefínica ou similar; pelos dois sistemas de drenagem separados para captação de água do subsolo que se escoa pelos drenos, e para petróleo/ hidrocarbonetos líquidos que se escoam pelos drenos; pela estrutura genérica de sustentação do fundo duplo e dos sistemas de drenagem constituída, no sentido de baixo para cima, pelo subleito, camada drenante compactada para captação de água do subsolo, camada de solo compactado, fundo externo recoberto com geotextil, manta polimérica ou similar, camada drenante para captação de petróleo/ hidrocarbonetos líquidos, camada de solo compactado, base de agregado pétreo compactado com imprimação asfáltica, revestimento betuminoso flexível e fundo interno recoberto com geotêxtil, manta polimérica ou similar. Patent Document PI0205038-2 filed 10/04/2002 entitled Double Bottom Surface Storage Tanks Petroleum and Liquid Hydrocarbons teaches a concrete tank, equipped with a generic floating roof, formed by the side and a circular shoe resting on the ground, both reinforced concrete or prestressed concrete depending on the capacity of the tank, equipped with a generic floating roof characterized by the structure. tubular monolithic with passages in the shoe to the drains; the double bottom composed of the inner bottom and the outer bottom, both formed by a polymeric, preferably polyolefin, or similar geomembrane; the two separate drainage systems for underground water abstraction that drains through the drains, and for oil / liquid hydrocarbons flowing through the drains; by the generic support structure of the double bottom and the drainage systems made up, from the bottom up, the subgrade, compacted drainage layer for underground water collection, compacted soil layer, geotextile-covered outer bottom, polymeric blanket or the like. , oil / liquid hydrocarbon drainage layer, compacted soil layer, asphalt primed compacted aggregate base, flexible bituminous coating and geotextile-coated inner floor, polymer blanket or the like.
Como poderá ser observado, nenhum desses documentos de patente conhecidos do estado da técnica apresentam integralmente as características da geomembrana produzida com misturas de polietileno a partir de cana de açúcar de alta densidade e polietileno linear de baixa densidade objeto da presente patente.  As will be appreciated, none of these known prior art patent documents fully exhibit the characteristics of the geomembrane produced with mixtures of polyethylene from high density sugar cane and low density linear polyethylene object of the present invention.
Em vista disso, ao longo do tempo foram procedidos estudos avaliando o uso de produtos de fonte renovável e consequentemente foi desenvolvido este produto que possibilita a concepção de uma geomembrana produzida com misturas de polietileno de alta densidade e polietileno linear de baixa densidade, através do qual surgiu a possibilidade de se obter geomembrana a partir de fontes renováveis. In view of this, studies have been conducted over time to evaluate the use of renewable source products and consequently this product has been developed which enables the design of a geomembrane produced with mixtures of high density polyethylene and low density linear polyethylene, through which the possibility of obtaining geomembrane from renewable sources arose.
É, pois, um dos objetivos da presente patente prover uma geomembrana sustentável, ou seja, produzida com um produto de fonte renovável e que contribua para o meio ambiente tanto na geração de energia quanto na remoção de C02. It is therefore one objective of the present invention to provide a sustainable geomembrane, or produced from a renewable source of product and contributes to the environment both in power generation as in the removal of C0 2.
O objetivo é gerar um material produzido através de uma fonte renovável. Além disso, os processos de produção de polietileno consomem muita energia. O polietileno produzido por meio da cana-de-açúcar gera energia por meio da queima do bagaço suficiente para operar a planta e ainda sobra uma quantidade. Além disso, o processo de fotossíntese da cana-de- açúcar consome C02 do ambiente. Para cada Kg de polietileno produzido, cerca de 2Kg de C02 é consumido do ambiente. Ou seja, esta geomembrana é também um produto sustentável. The goal is to generate a material produced through a renewable source. In addition, polyethylene production processes consume a lot of energy. The polyethylene produced through sugarcane generates energy by burning enough bagasse to operate the plant and still has a quantity left over. In addition, the sugarcane photosynthesis process consumes C0 2 from the environment. For each kg of polyethylene produced, about 2 kg of CO2 is consumed from the environment. That is, this geomembrane is also a sustainable product.
A geomembrana objeto da presente patente é produzida com polietileno obtido por meio da cana-de-açúcar sendo obtida pelos processos de produção balão e plano/cast. No entanto, será produzida com polietileno de fonte renovável contribuindo desta maneira para o meio ambiente.  The geomembrane object of the present invention is produced with sugarcane polyethylene obtained by the balloon and plan / cast production processes. However, it will be produced from renewable source polyethylene thus contributing to the environment.
A geomembrana objeto da presente patente é obtida por meio do processo de extrusão, utilizando-se mistura dos seguintes materiais:  The geomembrane object of the present patent is obtained by the extrusion process using a mixture of the following materials:
PEAD - polietileno de alta densidade produzido com etileno obtido do álcool da cana-de-açúcar  HDPE - high density polyethylene produced from ethylene obtained from sugarcane alcohol
PEBDL - polietileno de baixa densidade linear produzido com etileno obtido do álcool da cana-de-açúcar  LLDPE - linear low density polyethylene produced from ethylene obtained from sugarcane alcohol
PEBD - polietileno de baixa densidade Master batch preto contendo negro de fumo e aditivos anti-oxidante e anti-UV. LDPE - low density polyethylene Black master batch containing carbon black and anti-oxidant and anti-UV additives.
Uma quantidade acima de 75% será utilizada dos dois primeiros materiais mencionados produzidos com etileno de fonte renovável, contribuindo desta maneira com o meio ambiente.  An amount above 75% will be used from the first two mentioned materials produced from renewable source ethylene, thus contributing to the environment.
Não se tem conhecimento de nenhuma geomembrana que reúna conjuntamente, todas as características construtivas e funcionais acima relatadas, e que direta ou indiretamente, é ou foi tão efetiva quanto a geomembrana objeto da presente patente.  It is not known of any geomembrane that together, all the constructive and functional characteristics reported above, and which directly or indirectly, is or was as effective as the geomembrane object of the present patent.
Tendo sido descrita e ilustrada a presente invenção, é para ser compreendido que a mesma pode sofrer inúmeras modificações e variações em sua forma de realização, desde que tais modificações e variações não se afastem a partir do espírito e escopo da invenção, tal como definido no quadro reivindicatório.  Having described and illustrated the present invention, it is to be understood that it may undergo numerous modifications and variations in its embodiment, provided that such modifications and variations do not depart from the spirit and scope of the invention as defined herein. claim framework.

Claims

REIVINDICAÇÕES
1 - "GEOMEMBRANA PRODUZIDA COM MISTURAS DE POLIETILENO DE ALTA DENSIDADE, POLIETILENO LINEAR DE BAIXA DENSIDADE E POLIETILENO DE BAIXA DENSIDADE", caracterizada pelo fato de ser produzida com polietileno obtido da cana-de-açúcar (polietileno de alta densidade e polietileno linear de baixa densidade) sendo produzida por extrusão pelos processos balão e plano/cast, utilizando-se mistura dos seguintes materiais:  1 - "GEOMEMBRANE PRODUCED WITH HIGH DENSITY POLYETHYLENE, LOW DENSITY POLYETHYLENE AND LOW DENSITY POLYETHYLENE", characterized by the fact that it is produced with sugarcane polyethylene (high density polyethylene and low linear polyethylene). density) being produced by extrusion by the balloon and plan / cast processes using a mixture of the following materials:
PEAD - polietileno de alta densidade produzido com etileno obtido do álcool da cana-de-açúcar  HDPE - high density polyethylene produced from ethylene obtained from sugarcane alcohol
PEBDL - polietileno de baixa densidade linear produzido com etileno obtido do álcool da cana-de-açúcar  LLDPE - linear low density polyethylene produced from ethylene obtained from sugarcane alcohol
PEBD - polietileno de baixa densidade  LDPE - low density polyethylene
Master batch preto contendo negro de fumo e aditivos anti-oxidante e anti-UV;  Black master batch containing carbon black and anti-oxidant and anti-UV additives;
2 - "GEOMEMBRANA PRODUZIDA COM MISTURAS DE POLIETILENO DE ALTA DENSIDADE, POLIETILENO LINEAR DE BAIXA DENSIDADE E POLETILENO DE BAIXA DENSIDADE", de acordo com a reivindicação 1 , caracterizada pelo fato de que uma quantidade acima de 75% será utilizada dos dois primeiros materiais mencionados produzidos com etileno de cana-de-açúcar.  2 - "GEOMEMBRANE PRODUCED WITH HIGH DENSITY POLYETHYLENE, LOW DENSITY LINEAR POLYETHYLENE AND LOW DENSITY POLETILENE" according to claim 1, characterized in that an amount above 75% will be used of the first two materials mentioned above. produced with sugarcane ethylene.
PCT/BR2011/000368 2011-08-04 2011-09-19 Geomembrane produced from mixtures of high-density polyethylene, low density linear polyethylene and low density polyethylene WO2013016786A1 (en)

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EP3770351A1 (en) 2019-07-24 2021-01-27 Keramik Holding AG Laufen Fastening system for fastening of sanitary devices to walls

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CO6970580A2 (en) 2014-06-13
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