The invention relates to a method in which a polyester melt containing one or more polyesters is produced, the polyester melt being foamed by a blowing agent and a foamed granulate is produced from the foamed polyester melt. The intrinsic viscosity (IV) of the polyester melt is reduced by the blowing agent about at least 0.05 dl/g, measured according to ASTM D4603, and the IV of the foamed granulate is then increased by means of a solid phase polycondensation (SSP).

The invention relates to a method in which a polyester melt containing one or more polyesters is produced, the polyester melt being foamed by a blowing agent and a foamed granulate is produced from the foamed polyester melt. The intrinsic viscosity (IV) of the polyester melt is reduced by the blowing agent about at least 0.05 dl/g, measured according to ASTM D4603, and the IV of the foamed granulate is then increased by means of a solid phase polycondensation (SSP).

Disclosed is a method for the preferential heating of a thermoplastic hollow body having at least one portion to be heated and another to be superheated, the portion that is to be superheated initially having a radiation absorption coefficient substantially identical to that of the portion to be heated. The method includes, in succession: a first step of marking the portions of the hollow body that are to be superheated, during which step isolated marks are made in the thickness of the wall of the portion that is to be superheated so as to increase its absorption coefficient; a second step of preferential heating of the hollow body by uniform exposure of the portions that are to be heated and of the portions that are to be superheated to the heating electromagnetic radiation. Also disclosed is a preform marked in accordance with the first step of the method.

A flow head and a method for use with a blow molding apparatus. The flow head includes a flow head housing with a material flow cavity. The flow head housing includes a movable die pin mechanism which is moveable between an open position and a closed position. A main melt pipe is connected to the material flow cavity. The main melt pipe is maintained at a first temperature. A shot chamber mechanism is connected to the material flow cavity. The shot chamber mechanism is maintained at a second temperature, which is lower than the first temperature. Thermoplastic material is formed into a parison for the blow molding apparatus. As the movable die pin mechanism is positioned in the closed position, the thermoplastic material is moved to the shot chamber to prevent degradation of the thermoplastic material.

A blow bottle includes an outer layer and an inner layer, wherein the inner layer has blackness higher than that of the outer layer, and wherein the outer layer has an L* value of 20 or more and 90 or less in an International Commission on Illumination (CIE) L*a*b* color system.

A blow bottle includes an outer layer and an inner layer, wherein the inner layer has blackness higher than that of the outer layer, and wherein the outer layer has an L* value of 20 or more and 90 or less in an International Commission on Illumination (CIE) L*a*b* color system.

Injection stretch blow molding process for preparing polyolefin containers, comprising the following steps: 1) preparing a preform by injection molding a polyolefin composition comprising a polymer (A) selected from ethylene polymers, propylene polymers and mixtures thereof, and a heat absorber (B); 2) supplying heat to reheat the preform prepared in step 1) and stretch blow molding said preform; wherein the heat absorber (B) is selected from phosphates, condensed phosphates, phosphites, and mixed hydroxide/phosphate oxanion compounds of Copper (Cu), Calcium (Ca), Tin (Sn) and/or Iron (Fe).

Disclosed is a method for the preferential heating of a thermoplastic hollow body having at least one portion to be heated and another to be superheated, the portion that is to be superheated initially having a radiation absorption coefficient substantially identical to that of the portion to be heated. The method includes, in succession: a first step of marking the portions of the hollow body that are to be superheated, during which step isolated marks are made in the thickness of the wall of the portion that is to be superheated so as to increase its absorption coefficient; a second step of preferential heating of the hollow body by uniform exposure of the portions that are to be heated and of the portions that are to be superheated to the heating electromagnetic radiation. Also disclosed is a preform marked in accordance with the first step of the method.

The invention pertains to A polyannide composition [composition (C)] comprising: from 20 to 95% wt of at least one polyamide [polyamide (A)]; from 1 to 30% wt of at least one branched polyamide different from polyamide (A), said branched polyamide comprising recurring units derived from polycondensation of a mixture [mixture (B)] comprising: at least one polyamine monomer comprising at least three amine functional groups selected from the group consisting of secondary amine group of formula NH and primary amine group of formula -MH.sub.2 [monomer (FN)], and-caprolactam (or derivates thereof); said branched polyamide possessing a concentration of amine end groups (AEG) and a concentration of carboxylic end groups (CEG) such that the difference AEGCEG is of at least 100 meq/kg [polyamide (B)]; andfrom 0.01 to 3.5% wt of at least one thermal stabilizer [stabilizer (S)], optionally, from 0 to 60% wt of at least one filler [filler (F)]; optionally, from 0 to 20% wt of at least one impact modifying rubber [rubber (I)]; optionally, from 0 to 20% wt of other conventional additives, with above % wt being referred to the total weight of composition (C).

Described are coating compositions comprising a polyester, the polyester comprising: at least one polyester which comprises a dicarboxylic acid component comprising terephthalic acid residues, and a glycol component comprising 30 to 40 mole % 2,2,4,4-tetramethyl-1,3-cyclobutanediol residues and 60 to 70 mole % cyclohexanedimethanol residues, where the inherent viscosity of the polyester is from 0.10 to 0.70 dL/g, and where the coating composition is made from a film or sheet.