The present invention deals with a process for producing a multimodal ethylene polymer composition suitable for producing films by blow moulding. The process comprises (i) copolymerising ethylene and an alpha-olefin comonomer in a first polymerisation step in the presence of a silica supported Ziegler-Natta polymerisation catalyst to produce a first ethylene homo- or copolymer (PE1) having a density of from 940 to 980 kg/m.sup.3 and a melt flow rate MFR.sub.2 of from 400 to 1000 g/10 min; (ii) copolymerising ethylene and an alpha-olefin comonomer in a second polymerisation step in the presence of the first ethylene copolymer to produce a first ethylene polymer mixture (PEM1) comprising the first ethylene copolymer and a second ethylene copolymer, said first ethylene polymer mixture having a density of from 940 to 980 kg/m.sup.3 and a melt flow rate MFR2 of from 150 to 800 g/10 min, and wherein the MFR.sub.2 of the first ethylene copolymer (PEI) is higher than first ethylene polymer mixture (PEM1) and (iii) copolymerising ethylene and an alpha-olefin comonomer in a third polymerisation step in the presence of the first ethylene polymer mixture to produce a second ethylene polymer mixture (PEM2) comprising the first ethylene polymer mixture and a third ethylene copolymer, said second ethylene polymer mixture having a density of from 915 to 925 kg/m.sup.3 and a melt flow rate MFR.sub.5 of from 0.3 to 5 g/10 min.

Disclosed herein is a preform having a preform wall. The preform wall preferably comprises a composition comprising at least one polyester component, a transition metal catalyst, and a vegetable oil. The vegetable oil may comprise at least one molecule having a double allylic structure. The at least one polyester component may comprise at least one acid unit and at least one diol unit. The concentration of double allylic structures of the vegetable oil in the composition may be greater than 5.0 meq/kg of all of the polyester components. The preform has improved aesthetic characteristics.

Disclosed herein is an oxygen scavenging composition for containers. The oxygen scavenging composition for containers may comprise at least one polyester component, a transition metal catalyst, an oxygen scavenger, and a vegetable oil. The vegetable oil preferably comprises at least one molecule having a double allylic structure. The polyester component preferably comprises at least one acid unit and at least one diol unit. The concentration of double allylic structures of the vegetable oil in the composition may be greater than 5.0 meq/kg of all of the polyester components. The oxygen scavenger is preferably present in the composition at a level less than 1.0% by weight of the total composition. The vegetable oil is preferably present in the composition at a level greater than 0.3% by weight relative to the total weight of the polyester components, the transition metal catalyst and the vegetable oil.

Compositions of compatibilized blends of polyamides in polyesters, methods and resins for forming such compositions, and containers made from such compositions which higher burst pressure, crystallization at higher temperatures during production and reduced haze as compared to than containers made from previous blends are disclosed.

Polyethylene blends made from recycled polyethylene and a bimodal polyethylene composition are disclosed. The polyethylene blends are suitable for compression molding or injection molding applications and are particularly useful in the manufacture of caps and closures for bottles.

The disclosure generally relates to poly alpha-1,3-glucan compositions and articles containing them. In particular interest is comprising poly alpha-1,3-glucan ester derivatives. The poly alpha-1,3-glucan derivatives are useful in thermoprocesses and in particular, injection molding processes.

Renewably-sourced biodegradable polyolefin packaging, utensils, and containers include a renewably-sourced polyolefin (for example, polyethylene and polypropylene) and a biodegrading agent. The renewably-sourced biodegradable polyolefin packaging is made from plant materials typically by polymerizing olefins that are made from reducing alcohols created by fermenting plant materials. An example of a suitable plant material is sugarcane and its derivatives. The biodegrading agent accelerates the biodegradation of polyolefin packaging even in anaerobic and dark (i.e., absent of ultraviolet light) environments. Such a packaging is particularly useful for packaging frozen food that is to be microwaved in the packaging. The package is also particularly usable as packaging for frozen comestibles, which are often stored at dry-ice temperatures. Ultimately, the renewably-sourced biodegradable polyolefin packaging provides a start-to-finish green packaging that meets the requirements of being renewably sourced, biodegradable in landfills, and having similar performance as traditional polyolefin packaging.

A spunbond non-woven fabric includes a plurality of fibers. The fibers are formed from a polymer blend that includes at least one first polymer and at least one second polymer. A melt flow rate of the at least one first polymer is greater than a melt flow rate of the at least one second polymer, and the melt flow rate of the at least one second polymer is about 9 g/10 min to less than 18 g/10 min. The blend may include a percentage by weight of the second polymer that is greater than a percentage by weight of the first polymer.

Polyarylene sulfide compositions are described that exhibit high strength and flexibility. Methods for forming the polyarylene sulfide compositions are also described. Formation methods include dynamic vulcanization of a polyarylene sulfide composition that includes an impact modifier dispersed throughout the polyarylene sulfide. A crosslinking agent is combined with the other components of the composition following dispersal of the impact modifier throughout the composition. The crosslinking agent reacts with the impact modifier to form crosslinks within and among the polymer chains of the impact modifier. The compositions can exhibit excellent physical characteristics at extreme temperatures and can be used to form, e.g., tubular member such as pipes and hoses and fibers.

Provide is a polymer that can provide excellent toughness and weather resistance to a rubber composition and a rubber product such as a tire. The multicomponent copolymer contains a conjugated diene unit, a non-conjugated olefin unit and an aromatic vinyl unit, where a proportion of conjugated diene units bonded to a unit other than a conjugated diene unit out of the total conjugated diene units is 50% or more.