Abstract:
A plastic preform, container or article includes a multilayer wall having at least one layer of a matrix resin, at least one layer of a barrier resin, an adhesion-promoting material blended with the barrier resin and/or matrix resin, and an active oxygen barrier composition blended with the barrier resin and/or matrix resin. The adhesion-promoting material promotes bonding between the barrier and matrix resin layers and includes an amine polymer, preferably an imine polymer having a number of available primary, secondary or tertiary amine groups. The matrix resin preferably is an ester-containing resin, such as PET. The barrier resin preferably is EVOH. The active oxygen barrier composition includes a metal with an additive compound, and may also include a host polymer.
Abstract:
The present invention provides the gas barrier molded article having high permeation barrier properties against oxygen gas, water vapor and the like. A gas barrier material containing cellulose fibers having an average fiber diameter of not more than 200 nm wherein the content of carboxyl group in a cellulose ranges from 0.1 to 2 mmol/g; and further a cross-linking agent having a reactive functional group or the cellulose fibers being dried or heated or a gas barrier molded article containing a molded substrate and a layer composed of the gas barrier material on the surface of the molded substrate.
Abstract:
Compositions comprising a polyester resin and a polyamide derived from a dicarboxylic acid with 6-22 carbon atoms and from m-xylylene diamine having high-level gas barrier properties, obtained by mixing in the melted state the polyester resin premixed with a dianhydride of a tetracarboxylic acid and the polyamide, operating under conditions such as to render the polymeric components theologically rheologically compatible with each other. The compositions are suitable for preparing containers and biaxially-orientated films.
Abstract:
A transparent article includes a continuous polyester matrix having at least one incompatible filler dispersed therein. The incompatible filler provides domains in the polyester matrix, each domain having a particular dimension, thus providing a range of dimensions for the domains in the article. To create haze, the dimensions are within the range of from about 380 nm to about 720 nm. Once the range of dimensions is determined, a light absorbent composition can be found which absorbs light at a range of wavelengths that at least substantially covers the range of dimensions of the domains. In doing so, it has been found that the haze of the article can be substantially masked. Method for producing the article and for masking the haze are also provided.
Abstract:
The present invention provides a resin composition which is excellent in gas-barrier properties after a hot-water treatment and excellent in handling properties without increasing viscosity of the resin composition in a melt-kneading step at forming. The invention provides a resin composition containing a thermoplastic resin (A) and a partially dehydrated product or completely dehydrated product (B) of hydrated carboxylic acid salt.
Abstract:
The use of a colloidal silica having a specific surface area greater than 300 m2/g in a gas barrier coating additionally comprising polyvinyl alcohol and/or ethylene vinyl alcohol copolymer and/or a silylated derivative thereof improves wet bond strength.
Abstract:
Disclosed is a composition having gas-barrier properties, comprising: a water-soluble polymer (X), a metal alkoxide and/or a hydrolysis condensate thereof (C) and an esterification catalyst (E), wherein said water-soluble polymer (X) contains at least one of (i) a mixture of a water-soluble polymer having hydroxyl groups (A) and a water-soluble polymer having carboxyl groups (B), and (ii) a water-soluble polymer having a hydroxyl group and a carboxyl group (AB) and said component (C) is contained in an amount of not less than 460 parts by weight and not more than 2,700 parts by weight, and said component (E) is contained in an amount of not less than 0.01 part by weight and not more than 100 parts by weight, relative to 100 parts by weight of said water-soluble polymer (X).
Abstract:
Good bond strength and shelf life in a composition for preparing a gas barrier coating comprising an aqueous dispersion of a clay and a polyvinyl alcohol and/or an ethylene vinyl alcohol copolymer are achieved by including in the composition a poly(ethyleneimine).
Abstract:
A barrier composition which is injection mouldable and able to be made into a transparent film or incorporated (by co-extrusion and/or lamination) into multi-layer film products, the composition on dry basis: a) from 45 to 90% by weight of a starch and/or a modified starch selected from starches modified by reaction with a hydroxyl alkyl group, an acetate or a dicarboxylic acid anhydride or a grafting polymer; b) from 4 to 12% by weight of a water soluble polymer selected from polyvinyl alcohol, polyvinylacetate, and copolymers of ethylene and vinylalcohol which have a melting point compatible with the molten state of the starch components c) from 5 to 45% by weight of a non-crystallising mixture of sorbitol and at least one other plasticizer selected from glycerol, maltitol, xylitol, mannitol, glycerol trioleate, epoxidised linseed or soybean oil, tributyl citrate, acetyl tri-ethyl citrate, glyceryl triacetate, 2,2,4-trimethyl-1,3-pentanediol diisobutyrate; polyethylene oxide or polyethylene glycol; d) from 0.3 to 2.5% by weight of a C12-22 fatty acid or salt; e) from 0.25% to 3% of an emulsifier system having a hydrophilic lipophilic balance value between 2 and 10. The barrier film may be co-injection moulded with polyethylene terephthalate (PET) or polylactic acid (PLA) for blow moulding into beverage bottles, with polyethylene (PE) or polypropylene (PP) or biodegradable polymers for high gas-barrier containers or closures, or may be co-extruded with polyethylene, polypropylene or polylactic acid for thin film packaging applications or for blow-moulded containers.
Abstract:
A transparent article includes a continuous polyester matrix having at least one incompatible filler dispersed therein. The incompatible filler provides domains in the polyester matrix, each domain having a particular dimension, thus providing a range of dimensions for the domains in the article. To create haze, the dimensions are within the range of from about 380 nm to about 720 nm. Once the range of dimensions is determined, a light absorbent composition can be found which absorbs light at a range of wavelengths that at least substantially covers the range of dimensions of the domains. In doing so, it has been found that the haze of the article can be substantially masked. Method for producing the article and for masking the haze are also provided.