Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
164 words
(1) A polyolefin type resin laminate comprising a base layer made of a polyolefin type resin consisting mainly of a butene-1 type polymer in which the content of other α-olefin units is 15 mol% or below, the intrinsic viscosity [η] is 1.2 to 4.0 dl/g, the ratio Mw/Mn of the weight-average molecular weight [Mw] to the number-average molecular weight [Mn] is from 2 to 10, and the haze is 50% or below, and layers provided on each of the opposite surfaces of said base layer and made of a polyolefin type resin having a melt index [MI] of 0.1 to 30g/10 min, the haze of each of the latter layers being up to that of said base layer, characterized in that the haze of said laminate is 3% or below, the strain recovery rate is 90% or more and the ratio of the tear strength in the M.D. (machine direction) to the tear strength in the T.D. (transverse direction) is from 0.25 to 4.
Claim 2
Dependent Claim
18 words
(2) A polyolefin type resin laminate as claimed in Claim 1, characterized in that said α-olefin is ethylene.
Claim 3
Dependent Claim
52 words
(3) A polyolefin type resin laminate as claimed in Claim 1, characterized in that said polyolefin type resin is at least one selected from the group consisting of butene-1 copolymers wherein the content of the ethylene units is 15 mol% or below, and blends made up of such butene-1 copolymers with polypropylenes.
Claim 4
Dependent Claim
60 words
(4) A polyolefin type resin laminate as claimed in Claim 3, characterized in that said butene-1 copolymer is one wherein the highest melting point measured with a differential scanning calorimetric analyzer is in the range of 70 to 120°C, and the difference between the highest melting point and the lowest melting point is in the range of 2 to 40°C.
Claim 5
Dependent Claim
37 words
(5) A polyolefin type resin laminate as claimed in Claim 3, characterized in that the amount of the heat of fusion measured with a differential scanning calorimetric analyzer is in the range of 2 to 25 cal/g.
Claim 6
Dependent Claim
31 words
(6) A polyolefin type resin laminate as claimed in Claim 3, characterized in that said butene-1 copolymer is one wherein the ethylene block property measured by ¹³C-NMR is 0.015 or below.
Claim 7
Dependent Claim
35 words
(7) A polyolefin type resin laminate as claimed in Claim 3, characterized in that said butene-1 copolymer is one wherein the boiling diethyl ether soluble content is in the range of 3 to 25 wt.%.
Claim 8
Dependent Claim
46 words
(8) A polyolefin type resin laminate as claimed in Claim 1, characterized in that each of the layers on the opposite surfaces of said base layer is made of at least one polyolefin type resin selected from the group consisting of linear low-density polyethylenes, and polypropylenes.
Claim 9
Dependent Claim
29 words
(9) A polyolefin type resin laminate as claimed in Claim 1, characterized in that the thickness of said base layer is in the range of 7 to 45 µm.
Claim 10
Dependent Claim
47 words
(10) A polyolefin type resin laminate as claimed in Claim 1, characterized in that the ratio of the thickness of the said base layer to the thickness of the layers located on the opposite surfaces of said base layer is in the range of 0.5 to 20.