摘要:
A method is provided for cleaning the interior of polymer processing equipment having a resin composition retained therein, wherein a contaminant material is adhered to at least a portion of the interior surface of the polymer processing equipment. The method comprises the steps of: charging the polymer processing equipment having a residual polymer composition retained in the interior thereof with a purging composition comprising 45-94 weight % of starch; 0.05 to 20 weight % of water; and (3) 5 to 45 weight % of polyol plasticizer, wherein the weight percentages of starch, water and polyol plasticizer are based on the total weight of starch, water and polyol plasticizer; operating the polymer processing equipment to i) convey the purging composition through the polymer processing equipment, thereby removing and withdrawing substantially all of the residual polymer composition from the polymer processing equipment and causing a portion of the purging composition to be retained as a residual purging composition within the interior of the polymer processing equipment; and ii) remove at least a portion of the contaminant material that is adhered to an interior surface of the polymer processing equipment; and removing the portion of the purging composition retained as a residual purging composition from within the interior of the polymer processing equipment.
摘要:
Disclosed is a composition comprises or is produced from a biopolymer, an olefin copolymer, and an optional polymer wherein the biopolymer comprises repeat units derived from a glycoside. Also disclosed is an article comprising or produced from the composition.
摘要:
Disclosed is a composition comprises or is produced from a biopolymer, an olefin copolymer, and an optional polymer wherein the biopolymer comprises repeat units derived from a glycoside. Also disclosed is an article comprising or produced from the composition.
摘要:
A multilayer film structure is disclosed which comprises at least a first layer made of a bio-based polymer composition; a tie layer comprising one or more ethylene copolymers and one or more inorganic fillers; and optionally at least one additional layer.
摘要:
Disclosed is a shaped article comprising a composition comprising polyamide and ionomer wherein the ionomer comprises a mixture of Zn and alkali metal (M2) cations wherein the Zn/M2 equivalent ratio is from about 0.6 to about 6. The articles prepared from the compositions with mixed ion ionomers exhibit high stiffness, hardness and toughness, good scratch resistance, desirable low melt viscosity and high processability.
摘要:
Films comprising a liquid-absorbent layer with an adsorbed antimicrobial material and an impermeable layer are provided. The films can be suitable for preparation of tubular casings and shrinkbags such as casings for foodstuffs. Also disclosed are foodstuffs processed in the tubular casing comprising the antimicrobial material.
摘要:
A composition is disclosed which comprises a mixture of a poly(trimethylene terephthalate) polymer composition, a nucleating agent, and an ethylene copolymer. Also disclosed in a method for reducing the melt viscosity of nucleated poly(trimethylene terephthalate) polymer composition.
摘要:
An ionomer blend composition comprises a blend of a first ionomer and a second ionomer that is different from the first ionomer. The first ionomer is derived from a first precursor acid copolymer that has a melt flow rate of about 10 to about 4000 g/10 min and that comprises copolymerized units of an α-olefin and about 20 to about 30 wt % of copolymerized units of an α,β-ethylenically unsaturated carboxylic acid. Moreover, the first precursor acid can be neutralized to a level of about 40% to about 90% to form a sodium ionomer that has a MFR of about 0.7 to about 25 g/10 min and a freeze enthalpy that is less than about 3.0 j/g or that is not detectable, when determined by differential scanning calorimetry (DSC). A variety of articles may comprise or be produced from the ionomer blend composition, for example by injection molding.
摘要:
A foamable composition comprises at least about 50 wt % of a copolymer of ethylene and alkyl (meth)acrylate having a broad chemical composition distribution (CCD), and having a melt index between about 7 and about 30; about 2 to about 40 wt % of a polyolefin having a carboxylic acid or carboxylic acid anhydride functionality; about 1 to about 10 wt % of one or more foaming agents; and about 1 to about 5 wt % of one or more crosslinking agents. This foamable composition combines ease of processing with good foaming characteristics while avoiding unwanted characteristics, such as fogging.
摘要:
A thermoplastic polymer composition comprising (a) 50-90 wt. % of a polymer blend comprising (i) 10-40 wt. % polypropylene (ii) 15-50 wt. % uncrosslinked ethylene propylene copolymer rubber having an ethylene content of 60-80 wt %, (iii) 20-60 wt. % of an ionomeric copolymer of ethylene and an &agr;,&bgr;-unsaturated C3-C8 carboxylic acid, and (iv) 0.1-5 wt. % of a copolymer of ethylene and glycidyl acrylate or glycidyl methacrylate, (b) 10-40 wt. % inorganic filler and (c) 0-15 wt. % of an uncrosslinked ethylene propylene copolymer rubber having an ethylene content of 60-80 wt. % grafted with 0.01-5 wt. % of an &agr;,&bgr;-unsaturated carboxylic acid or an anhydride thereof.