Abstract:
An oxygen and moisture impermeable multilayer barrier film was provided including a barrier layer comprising a homopolymer of vinylidene chloride or a copolymer of vinylidene chloride and vinyl chloride or methyl methacrylate. The barrier layer may be coated onto or coextruded with a water soluble film layer comprising a blend of a water soluble polymer such as polyvinyl alcohol, polycaprolactone, or polyethyloxozaline and a thermoplastic polyurethane. The multilayer film may be used for reusable or disposable ostomy bags and for heat sealable bags used in packaging agricultural chemicals, detergents, and other household chemicals.
Abstract:
An oxygen and moisture impermeable multilayer barrier film (10) which was free of halogens and which may be produced by coextrusion or lamination techniques was provided. The film provides excellent adhesion between layers, has quietness, odor barrier, and softness characteristics, and provides a heat sealable surface for the fabrication of bags. The barrier film includes a halogen-free barrier layer (12) and at least one heat sealable skin layer (14). The heat sealable skin layer includes either a thermoplastic polyurethane, a substantially linear copolymer of ethylene and an alpha -olefin having a density in the range of from 0.87-0.92 gm/cc and from 0.01 to 3 long chain branches/1000 carbon atoms along the polymer backbone, a homogeneously-branched linear polyolefin resin, or a blend of an ultra low density polyolefin resin with a copolymer of ethylene and vinyl acetate.
Abstract:
A system for controlling the atmosphere in a produce storage room (1), in which a nitrogen source (4) is used for initially purging the room, a carbon adsorption bed (3) is used for adsorbing carbon dioxide in the room atmosphere when circulated through the bed, thereby to control the carbon dioxide content of the atmosphere, after regeneration of the bed to desorb carbon dioxide the bed is purged of oxygen with nitrogen from the source, and this purging step is manipulated to control the oxygen content of the room atmosphere.
Abstract:
Gaskets comprising at least one elastic substantially linear ethylene polymer are disclosed. The gaskets are particularly useful for sealing food and liquid containers and do not contribute to taste and/or odor of the packaged product, which is especially useful in foodstuff applications. The substantially linear ethylene polymers have processability similar to highly branched low density polyethylene (LDPE), but the strength and toughness of linear low density polyethylene (LLDPE).
Abstract:
Disclosed is an ethylene polymer foam structure having enhanced processing and physical properties. The foam structure comprises en ethylenic polymer material and a blowing agent. The blowing agent has a primary blowing agent of isobutane and a secondary blowing agent of 1,1,1-trifluoroethane, 1,1,1,2-tetrafluoroethane, or a blend of them. Further disclosed is a process for making the foam structure.
Abstract:
An aluminum nitride sintered product with a high thermal conductivity (at least 100 W/m.K) can be prepared at a sintering temperature of less than 1850 DEG C (often less than 1650 DEG C) using a sinterable combination of aluminum nitride powder with at least three sintering aids. The sintering aids include a source of a rare earth metal oxide, a source of an alkaline earth metal oxide, a boron source and, optionally, a source of aluminum oxide. The sinterable combinations may also be used to prepare cofired, multilayer substrates.
Abstract:
An environmentally friendly polymer film pouch made from a homogeneously branched substantially linear ethylene interpolymer film structure for the packaging of flowable materials such as milk, is disclosed. A pouch made from a multilayer film structure such as a two-layer or a three-layer coextruded film containing at least one seal layer of a homogeneously branched substantially linear polyethylene is also disclosed. A process for making a pouch for packaging flowable materials using a homogeneously branched substantially linear ethylene interpolymer film structure is also disclosed.
Abstract:
There is disclosed a method for oil or gas drilling or the drilling of a geothermal well in which a compressed inert gas, produced by the non-cryogenic separation of air is delivered to the drilling region of the downhole.
Abstract:
Disclosed is a process for making a styrenic polymer foam structure, comprising: a) heating a styrenic polymer material comprising greater than 50 percent by weight styrenic monomeric units and 0.1 to 40 percent by weight of oxygen-containing monomeric units based upon the total weight of the styrenic polymer material to form a melt polymer material; and b) incorporating into the melt polymer material a blowing agent comprising 5 weight percent or more carbon dioxide based upon the total weight of the blowing agent. Further disclosed is a foam structure obtainable according to the above process. The oxygen-containing comonomer content in the styrenic polymer material enables process operating pressures to be significantly reduced when using carbon dioxide as a blowing agent compared to a styrenic polymer material without comonomer content. The foam structure formed is of low density and of good quality.
Abstract:
Polyamino disuccinic acids are effective chelants for use in photography and gas conditioning (both applications preferably involving the polyamino disuccinic acid in the form of a metal, preferably an iron complex). The copper chelates are also useful in electroless copper plating. In photography, the invention includes a method of bleaching or bleach-fixing a photographic material which comprises contacting said material with a bleaching solution containing a bleaching agent comprising a ferric complex of a polyamino disuccinic acid and the solution so used. In electroless deposition, the invention includes a method of electroless deposition of copper upon a non-metallic surface receptive to the deposited copper including a step of contacting the non-metallic surface with an aqueous solution comprising a soluble copper salt and a polyamino disuccinic acid and plating baths appropriate for such use. Another aspect of the invention includes a method for removing iron oxide deposits from a surface including a step of contacting the deposits with a solution comprising an ammoniated polyamino disuccinic acid. Yet another aspect of the invention involves gas conditioning including a process of removing H2S from a fluid comprising contacting said fluid with an aqueous solution at a pH suitable for removing H2S wherein said solution contains at least one higher valence polyvalent metal chelate of a polyamino disuccinic acid and a process of removing NOx from a fluid comprising contacting the fluid with an aqueous solution of at least one lower valence state polyvalent metal chelate of a polyamino disuccinic acid.