Abstract:
A flexible carrier for carrying a plurality of containers, such as soft drink and other beverage containers, is formed from a polymer composition which provides the carrier with improved recovery, tensile strength and tear resistance. The polymer composition includes about 50-99% by weight of a low density ethylene polymer having a density of about 0.910-0.950 grams/cm3 and about 1-50% by weight of a single site catalyzed ethylene-alpha olefin copolymer plastomer having a density of about 0.850-0.905 grams/cm3.
Abstract:
A soft resin composition of the present invention comprises a polyethylene resin (A) and an ethylene/null-olefin random copolymer (B) comprising ethylene and an null-olefin having 3 to 20 carbon atoms at a specific proportion, wherein an MFR and density of the polyethylene resin (A), and a density, intrinsic viscosity, glass transition temperature, crystallinity, molecular weight distribution, B value and gnull* values of the copolymer (B) are each in a specific range. The soft resin composition is excellent in melt flow characteristics, namely excellent in moldability, and is capable of providing moldings excellent in balance between pliability and heat resistance. An ethylene/null-olefin copolymer resin composition of the present invention comprises a liner ethylene/null-olefin copolymer (A-null) comprising ethylene and an null-olefin having 4 to 20 carbon atoms and a long-chain branched ethylene/null-olefin random copolymer (B-null) comprising ethylene and an null-olefin having 3 to 20 carbon atoms in a specific proportion, wherein a density and melt flow rate of the copolymer (A-null) and a density, MFR, intrinsic viscosity, glass transition temperature, crystallinity, molecular weight distribution, B value and gnull* values of the copolymer (B-null) are each in a specific range. A film of the invention is produced from the resin composition. The ethylene/null-olefin copolymer resin composition is excellent in heat stability and suitability for high-speed molding, and can provide the films excellent in mechanical strength properties, low temperature heat-sealing properties and sealing stability, and further in slip characteristics and anti-blocking properties thereby being excellent in handling properties and suitability for high-speed filling upon packaging by automatic filling machines. The film also exhibits the effect as described above.
Abstract:
Provided is a thermoplastic resin structure formed of a resin composition that comprises substantially (a) from 5 to 80% by volume of a polyolefin resin and (b) from 20 to 95% by volume of a polyphenylene sulfide resin, which is characterized in that, in morphology therein seen through electronic microscopy, the polyphenylene sulfide resin (b) forms a matrix phase (continuous phase) and the polyolefin resin (a) forms a disperse phase. The thermoplastic resin structure gives plastic containers, tubes and their Attached parts having good barrier properties, strength, durability and workability.
Abstract:
A polymer composition suitable for rotomoulding comprising I) An ethylene homopolymer or copolymer with at least one other C3-10 null olefin, having a melt flow rate of 0.5 to 30, a molecular weight distribution (Mw/Mn) of less than 4, an Mw of 50,000 to 110,000, a density of 0.940 g/cm3 to 0.970 g/cm3 and a melting point of 100 to 145null C.; or I) a propylene homopolymer or copolymer with at least one other C2-10 null olefin, having a melt flow rate 0.5 to 30, a molecular weight distribution (Mw/Mn) of less than 4, an Mw of 150,000 to 300,000, and a melting point of 100 to 170null C.; and II) an ethylene homo or copolymer with at least one other C3-10 null-olefin, having a melt flow rate of within 40% of the melt flow rate of component (I), a molecular weight distribution of (Mw/Mn) of less than 4, an Mw of within 30% of the Mw of component (I), a density of 0.880 g/cm3 to 0.940 g/cm3 said density being at least 0.010 g/cm3 less than the density of component (I) and a melting point of at least 5null C. less than that of component (I); or (II) a propylene homo or copolymer with at least one other C2-10 null-olefin having a melt flow rate of within 40% of the melt flow rate of component (I), a molecular weight distribution of (Mw/Mn) of less than 4, an Mw of within 30% of the Mw of component (I), and a melting point of at least 10null C. less than that of component (I).
Abstract translation:适用于滚塑的聚合物组合物,其包含I)乙烯均聚物或与至少一种其它C 3-10α-烯烃的共聚物,其熔体流动速率为0.5至30,分子量分布(Mw / Mn)小于4, Mw为50,000〜110,000,密度为0.940g / cm 3〜0.970g / cm 3,熔点为100〜145℃。 或I)与至少一种其它C 2-10α-烯烃的丙烯均聚物或共聚物,其熔体流动速率为0.5至30,分子量分布(Mw / Mn)小于4,Mw为15万至30万,以及 熔点为100〜170℃。 和II)与至少一种其它C3-10α-烯烃的乙烯均聚物或共聚物,其熔体流动速率在组分(I)的熔体流动速率的40%以内,分子量分布(Mw / Mn) 小于4,Mw在组分(I)的Mw的30%以内,密度为0.880g / cm 3至0.940g / cm 3,所述密度为至少0.010g / cm 3 小于组分(I)的密度和比组分(I)的熔点小至少5℃的熔点; 或(II)与至少一种其它C2-10α-烯烃的丙烯均聚物或共聚物,其熔体流动速率在组分(I)的熔体流动速率的40%以内,分子量分布(Mw / Mn) 小于4,Mw在组分(I)的Mw的30%以内,熔点至少比组分(I)的熔点低10℃。
Abstract:
The present invention provides polyolefin compositions that exhibit both stiffness and toughness. Polyolefin compositions according to the invention include a polyolefin homopolymer resin such as polypropylene and an impact modifying fluid that includes a nonionic surfactant and optionally a diluent such as mineral oil. The nonionic surfactant can be an ethoxylated sorbitan fatty acid ester such as ethoxylated sorbitan trioleate. Unfilled impact modified polypropylene homopolymer formed in accordance with the invention preferably exhibits a Gardner impact strength of at least 100 in-lbs, a flexural modulus of at least 40 kpsi and a tensile modulus of at least 60 kpsi.
Abstract:
The present invention pertains to immiscible blends of two or more null-olefin/vinyl aromatic monomer interpolymers, the blend having at least one interpolymer component which comprises 2 to 7 mole percent vinyl aromatic monomer content, and uses for such blends. The blend components are selected to provide superior processability and/or performance, such as upper use temperature, in the blend compositions and in their end use applications.
Abstract:
The improved green strength, green elongation, and green relaxation properties of isobutylene-based elastomers at elevated temperatures along with improved aging and barrier properties are achieved by blending semi-compatible, semi-crystalline copolymers with the isobutylene elastomers. The semi-crystalline copolymers are typically copolymers of ethylene and an alpha-olefin having from 4 to 16 carbon atoms. The improved properties are maintained in subsequent rubber compounds containing said blends and are particularly useful in tire and pharmaceutical container applications.
Abstract:
The present invention relates to plasticized polyolefin compositions comprising a polyolefin and a non-functionalized hydrocarbon plasticizer.
Abstract:
A compatible blend of an engineering thermoplastic such as a polyamide and an olefin polymer material is prepared by (1) making an oxidized olefin polymer material containing carboxylic acid groups or derivatives thereof, (2) extruding a mixture of (a) the oxidized olefin polymer material from step (1), (b) an engineering thermoplastic, (c) optionally, an inorganic base, and (d) optionally, a non-oxidized olefin polymer material, and (3) recovering a blend of the engineering thermoplastic, the oxidized olefin polymer material or an ionomer thereof, which acts as a compatibilizer, and, optionally, the non-oxidized olefin polymer material. The oxidized olefin polymer material can be made by treating the olefin polymer material with an organic peroxide initiator while adding a controlled amount of oxygen.
Abstract:
Compositions for injection-molding of long, thin-walled, one-piece squeeze tubes include low-density polyethylene having a density less than about 0.925 g/cc and a melt index of at least about 50 g/10 minutes, and polypropylene having a high melt index greater than about 800 g/10 minutes, wherein the high melt index is attained by peroxide degradation of the polypropylene during melt processing. The compositions can also include a polymer that is miscible and compatible with low-density polyethylene and polypropylene for enhancing flow of the molding composition in the mold, the polymer having a glass transition temperature Tg of about null20 to null40null C, and/or a metallocene resin having a density less than about 0.915 g/cc.