A polymer includes a plurality of repeated polymerized units according to scheme (2): ##STR00001##

Provided are: a gas barrier resin composition having sufficient long-run workability and superior gas barrier properties which compare favorably to those of fossil fuel-derived resins, while containing a biomass-derived raw material; a multilayer structure in which the gas barrier resin is used; and a method for producing such a gas barrier resin composition. The gas barrier resin composition contains at least one type of saponified ethylene-vinyl ester copolymer, wherein of ethylene and a vinyl ester, which are raw materials of the at least one type of saponified ethylene-vinyl ester copolymer, a part is derived from biomass, and a remainder is derived from a fossil fuel.

The present invention relates to a reactor system for a multimodal polyethylene polymerization process, comprising; (a) a first reactor; (b) a hydrogen removal unit arranged between the first reactor and a second reactor comprising at least one vessel connected with a depressurization equipment, preferably selected from vacuum pump, compressor, blower, ejector or a combination thereof, the depressurization equipment allowing to adjust an operating pressure to a pressure in a range of 100-200 kPa (abs); (c) the second reactor; and (d) a third reactor and the use thereof as a container.

The disclosure relates to processes for producing lightweight polyethylene terephthalate articles such as bottles that retain good batTier properties against the permeation of oxygen, carbon dioxide and/or water vapor. The use of relatively small amounts of polytrimethylene furandicm.Math.boxylate during the formation of the PET bottles can produce a bottle having the required barrier properties and result in the use of less material.

Three independent approaches to the reduction of gas molecule permeability through a polyethylene terephthalate (PET) polyester film or container wall by increasing the mechanically or thermally induced crystallinity or the overall crystallinity level of a single or multilayer container, where the three approaches may be employed independently or in combination with one another.

A polymer includes a plurality of repeated polymerized units according to scheme (2):

##STR00001##

Described herein are strength characteristics and biodegradation of articles produced using one or more “green” sustainable polymers and one or more carbohydrate-based polymers. A compatibilizer can optionally be included in the article. In some cases, the article can include a film, a bag, a bottle, a cap or lid therefore, a sheet, a box or other container, a plate, a cup, utensils, or the like.

The present invention deals with a process for producing a multimodal ethylene polymer composition suitable for producing films by blow moulding and comprising the steps of (i) homopolymerising ethylene or copolymerising ethylene and an alpha-olefin comonomer in a first polymerisation step in the presence of a silica supported Ziegler-Natta catalyst to produce a first ethylene homo- or copolymer (PEI) having a density of from 940 to 980 kg/m.sup.3 and a melt flow rate MFR.sub.2 of from 2 to 1000 g/10 min, provided that if the first ethylene homo- or copolymer (PE1) is a copolymer, MFR.sub.2 thereof is in the range of 2 to 100 g/10 min; (ii) homopolymerising ethylene or copolymerising ethylene and an alpha-olefin comonomer in a second polymerisation step in the presence of the first ethylene homo- or copolymer to produce a first ethylene polymer mixture (PEM1) comprising the first ethylene homo- or copolymer and a second ethylene homo- or copolymer (PE2), said first ethylene polymer mixture having a density of from 940 to 980 kg/m.sup.3 and a melt flow rate MFR.sub.2 of from 10 to 1000 g/10 min; (iii) copolymerising ethylene and an alpha-olefin comonomer in a third polymerisation step in the presence of the first ethylene polymer mixture (PEM1) to produce a second ethylene polymer mixture (PEM2) comprising the first ethylene polymer mixture (PEM1) and a third ethylene copolymer (PE3), said second ethylene polymer mixture (PEM2) having a density of from 915 to 940 kg/m.sup.3 and a melt flow rate MFR.sub.5 of from 0.3 to 5 g/10 min, and wherein the second ethylene polymer mixture comprises from 10 to 35% by weight of the first ethylene homo- or copolymer, from 10 to 35% by weight of the second ethylene homo- or copolymer and from 45 to 70% by weight of the third ethylene copolymer.

A self-sealing composition is based on at least: one thermoplastic styrene elastomer; one polyolefin having a number-average molar mass Mn ranging from more than 550 000 to 5 000 000 g/mol; and at least 140 phr of an extender oil.

Provided are a resin composition having excellent oxygen barrier property under high humidity as a novel resin material, a molded body, a method for producing a molded body, and a method for producing a pellet using the resin composition. The resin composition includes a resin component and a plate-shaped talc having an aspect ratio of more than 18, 80 mass % of the resin component comprising a barrier resin having an oxygen transmission coefficient of 5.0 cc.Math.mm/(m.sup.2.Math.day.Math.atm) or less as measured according to ASTM D3985 at a relative humidity of 60% and a temperature of 23° C., and a content of the plate-shaped talc being from 3.0 to 55.0 mass % when a total of the barrier resin and the plate-shaped talc is 100 mass %.