Loading patent…
AssigneeToray Industries, Inc.
InventorsHideo Matsuoka, Mitsushige Hamaguchi, Kazuhiko Kobayashi
Estimating the term…
In the resin-molded articles comprising polyolefin resins (a) and thermoplastic resins other than the polyolefin resins (b), when thickness is defined as one along a direction vertical to the surface of the article, as morphology observed under an electron microscope in the article, a portion where the polyolefin resin (a) forms a continuous phase (A), a portion where the resin other than the polyolefin resin (b) forms the continuous phase and the polyolefin resin (a) forms a discontinuous phase (B), and a portion where the polyolefin resin (a) forms the continuous phase (A) are successively observed in order from the surface toward the inside along the thickness direction, such molded articles having nature such as toughness and fabrication quality inherent to the polyolefin resins and improved appreciably in resistance to permeation of liquid chemicals and gases.
A resin-molded article comprising a polyolefin resin (a) and a thermoplastic resin other than the polyolefin resin (b) wherein when thickness is defined as one along a direction vertical to a surface of the resin-molded article, as morphology observed under an electron microscope in the resin-molded article, a portion where the polyolefin resin (a) forms a continuous phase (A), a portion where the resin other than the poly olefin resin (b) forms the continuous phase and the olefin resin (a) forms a discontinuous phase (B), and the portion where the poly olefin resin (a) forms a continuous phase (A) are successively observed in order from the one surface toward the other side in the thickness direction.
The resin-molded article as described in claim wherein the contents of the polyolefin resin (a) and the thermoplastic resin other than the polyolefin resin (b) are from 20 to 80 weight percent and from 80 to 20 weight percent, respectively, and when the thickness is defined as one along the direction vertical to the surface of the molded article, both of the polyolefin resin (a) and the thermoplastic resin other than the polyolefin resin (b) are observed as the continuous phases in an arbitrary depth of from 5 to 10 percent of the entire thickness from the surface, and the continuous phase by the thermoplastic resin other than the polyolefin resin (b) and the discontinuous phase by the polyolefin resin (a) are observed in an arbitrary depth of from 45 to 55 percent of the entire thickness from the surface.
A process for forming the resin-molded article by melt molding a resin composition comprising 20 to 80 weight percent of the polyolefin resin (a) and 80 to 20 weight percent of the thermoplastic resin other than the polyolefin resin (b) wherein the melt viscosity ratio defined by the following formula (1) at a fabricating temperature is 0.5 or less in an arbitrary shear rate of 200 sec−1 or less and 0.8 or more in an arbitrary shear rate of 1000 sec−1 or more.
Dependencies are inferred from the claim text.