摘要:
The present invention is an extruded hollow thermoplastic sheeting, which is made of a pair of flat and parallel sheets spaced apart and interconnected by extending ribs of shifted patterns, e.g. of a sigmoid pattern, is disclosed in this invention. The thermoplastic sheeting of the invention has stronger tear strength and balanced physical properties as compared to hollow thermoplastic sheeting with extending ribs of straight pattern of the same specification. The present invention also provides a method for production thereof, wherein a fixing and cooling assembly is oscillated relative to a die, or vice versa, to create the ribs of shifted patterns.
摘要:
A process for producing a composition containing at least a thermoplastic resin and/or rubber and a filler which comprises melt kneading at least a thermoplastic resin and/or rubber and a compressed filler by the use of a kneading extruder which is composed of a twin-screw kneading portion equipped with screws each having an L/D (ratio of length to diameter) of at least 12 in a twin-screw portion, and equipped at an end of the twin-screw portion with a damming structure, and of a single-screw extrusion portion. It is made possible by the above process to produce in high productivity, a filler-containing composition well balanced in physical properties.
摘要:
The invention pertains to a process for producing bioriented polyester hollow bodies characterized by good gas and flavor tightness, wherein one wall of a preform is coated with an aqueous composition consisting of at least two incompatible polymers, one of which is a water soluble polyvinyl alcohol and the other, a polymer latex with low water sensitivity; the coating is dried and the preform is bidrawn-blown.
摘要:
A method for adhering together rubbers to be adhered including a rubber composition containing an ethylene-α-olefin copolymer, an organic peroxide (X1), and carbon black (Y1), using a rubber for adhesion including a rubber composition containing an ethylene-α-olefin copolymer, an organic peroxide (X2), and carbon black (Y2) at an adhesive interface, wherein contents of the organic peroxide (X1) in the rubber to be adhered and the organic peroxide (X2) in the rubber for adhesion are predetermined contents, and a content ratio (X2/X1) of the organic peroxide (X2) to the organic peroxide (X1) is from 1.20 to 2.00.
摘要:
An extruded air cooled blown film having a) a total thickness of 5 to 500 μm, b) a mono-layer structure or 2 to 9 coextruded layers, c) at least one layer L containing a polymer selected from the group consisting of polypropylene homopolymers, polypropylene random copolymers, hetero-phasic polypropylene block copolymers, or any mixtures thereof, said polymer having a melt flow rate, according to ASTM D-1238, of 0.1 to 10 dg/min at 230° C. and 2.16 kg, said layer L further containing 0.001 to 2%, relative to the weight of the polymer, of a particular nucleating agent, and optionally d) a Modulus according to EN ISO 527 enhanced by at least 10% versus a reference film without the nucleating agent.
摘要:
This invention provides an economical process for extruding a PLA resin into a low density foam with a high closed cell content. Excellent quality, low density foam is produced easily and reproducibly. The PLA resin in the foam has a weight average molecular weight of at least 500,000 and an intrinsic viscosity of at least 1.4 deciliters/gram.
摘要:
A process includes introducing a base polymer into an extruder, heating to a temperature sufficient to form a polymer melt, introducing a liquid comprising water and at least one additive consisting of an NO donating compound with mixing and subsequent vaporization and venting of the liquid to produce an extrudate having a uniform distribution of preferably uniformly small additive particles.
摘要:
A process for producing moldings with condensing-up of a polyamide molding composition by means of a compound having at least two carbonate units, wherein a) a polyamide molding composition is made available, b) a mixture of the polyamide molding composition and the compound having at least two carbonate units is prepared, c) the mixture is, if appropriate, stored and/or transported and d) the mixture is subsequently processed to produce the molding, with the condensing-up occurring only in this step, and the molding is a hollow body or hollow profile having an external diameter of at least 30 mm and a wall thickness of at least 1 mm, effects a significant increase in the melt stiffness combined with moderate processing presssures, which considerably simplifies the production of these moldings.
摘要:
A multi-component article comprising a first component comprising a biodegradable polymer, and a second component comprising a polyolefin and a reactive modifier. A method of preparing a multi-layer film comprising coextruding first and second film layers, wherein the first layer comprises a polylactic acid and the second layer comprises a polyolefin and an epoxy-functionalized polyolefin. A method of preparing a multi-component fiber comprising coextruding a core component and a sheath component, wherein the core component comprises a polyolefin and an epoxy-functionalized polyolefin and the sheath component comprises a polylactic acid.
摘要:
The present invention relates to blow molded multilayer hollow articles and a coextrusion blow molding process for the production of said multilayer hollow articles, made of thermoplastic polymers and characterized by a specific visual effect. More in particular, the present invention relates to multilayer hollow articles and a coextrusion blow molding process for the production of said multilayer hollow articles, wherein at least one layer is a continuous layer with a uniform degree of thickness and at least one layer is a discontinuous or a non-uniform continuous layer with varying degree of thickness, which results in a specific surface pattern and/or visual color effect.