US 5,691,070 AGranted

Polyolefin composition, molded article thereof and multilayered laminate

AssigneeShowa Denko K.K.

InventorsKazuyuki Watanabe, Satoshi Iwamoto

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Abstract

A polyolefin composition, which comprises: (A) 1 to 99% by weight of a polyolefin having the following properties of (a) to (e); (a) a ratio of kinematic viscosity .eta..sub.1 at a frequency of 10.sup.-1 rad/sec to kinematic viscosity .eta..sub.2 at a frequency of 10 rad/sec at a temperature of 190.degree. C. according to a kinematic viscoelasticity determination method of 4 to 20, (b) a crystallization peak temperature Tcp according to a Differential Scanning Calorimetry of 110.degree. C. to 130.degree. C., (c) a ratio (Tmp/Tcp) of melting peak temperature Tmp to crystallization peak temperature Tcp according to a Differential Scanning Calorimetry of 1.1 to 1.5, (d) Tmp/(Tmp-Tcp)=3.0 to 9.8, and (e) a crystal structure exhibiting a-axial orientation in a diffraction pattern according to a X-ray diffraction method, and (B) 99 to 1% by weight of a propylene resin having the following properties of (f) and (g); (f) a ratio of kinematic viscosity .eta..sub.1 at a frequency of 10.sup.-1 rad/sec to kinematic viscosity .eta..sub.2 at a frequency of 10 rad/sec at a temperature of 190.degree. C. according to a kinematic viscoelasticity determination method of below 4, and (e) and no crystallization structure exhibiting a-axial orientation in a diffraction pattern according to a X-ray diffraction method.

Claims4

Dependent claims

A multilayered laminate which comprises the following (i) and (ii):

(i) a layer of a polyolefin composition comprising;
(A) 1 to 99% by weight of a polyolefin having the following properties of (a) to (e);
(a) a ratio (.eta..sub.1 /.eta..sub.2) of kinematic viscosity .eta..sub.1 at a frequency of 10.sup.-1 rad/sec to kinematic viscosity .eta..sub.2 at a frequency of 10 rad/sec at a temperature of 190.degree. C. according to a kinematic viscoelasticity determination method of 4 to 20,
(b) a crystallization peak temperature Tcp according to a Differential Scanning Calorimetry (DSC) of 110.degree. to 130.degree. C.,
(c) a ratio (Tmp/Tcp) of melting peak temperature Tmp to crystallization peak temperature Tcp according to a Differential Scanning Calorimetry (DSC) of 1.1 to 1.5,
(d) Tmp/(Tmp-Tcp)=3.0 to 9.8, and
(e) a crystal structure exhibiting a-axial orientation in a diffraction pattern according to a X-ray diffraction method, and
(B) 99 to 1% by weight of a propylene resin having the following properties of (f) and (g);
(f) a ratio (.eta..sub.1 /.eta..sub.2) of kinematic viscosity .eta..sub.1 at a frequency of 10.sup.-1 rad/sec to kinematic viscosity .eta..sub.2 at a frequency of 10 rad/sec at a temperature of 190.degree. C. according to a kinematic viscoelasticity determination method of below 4, and
(g) and no crystal structure exhibiting a-axial orientation in a diffraction pattern according to a X-ray diffraction method, and
(ii) a layer of (C) block copolymer of propylene/ethylene.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/661,544Filed 11 Jun 1996 · division
Priority: JP 5-28024013 Oct 1993
Granted: 25 Nov 1997
Term ends: Not estimatedThe source records don’t support an estimate.

Classification19 codes

B32B 27/32
Layered products comprising a layer of synthetic resin: comprising polyolefins
B32B 27/08
As the main or only constituent of a layer, which is next to another layer of the same or of a different material: of synthetic resin
C08L 23/04
Not modified by chemical after-treatment: homopolymers or copolymers of ethene
C08L 23/10
Not modified by chemical after-treatment: homopolymers or copolymers of propene