EP0508415A2
Expired / Lapsed
EP
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A mat film or sheet and method for preparing the same
Assignee: Eneos Corp
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Filing: 1992-04-08
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Granted: —
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Expires: 2012-04-08
Abstract
Abstract A polyolefin-based mat film or sheet can be preared from a polymeric blend of the preset invention comprising a propylene polymer or copolymer as component (A) and a specific ethylene-α-olefin copolymer (VLDPE, so-called "super low-density polyethylene") as component (B). The polymeric blend may further comprise a high-pressure radical polymerization process ethylene polymer or copolymer and /or a modified polyolefin-based resin as component (C). The above blend of the present invention may further comprise an inorganic filler as component (D) and a flame retardant as component (E). The mat films or sheets prepared from these polymeric blends are excellent in tensile modulus, flexibility, impact resistance, thermal resistance, laminating properties, flame resistance, chalking resistance, covering power, scratch resistance, and widely used for fabricating adhesive tapes, covers or cases for stationeries, fashion bags, sheets for interior finish work in construction and automobile industries, and sheets for dressing steel plates.
Inventors
- 👤 Fujii Koichi
- 👤 Komaki Koichi
- 👤 Komori Shigeki
- 👤 Tajima Minoru
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 08:48
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/12; C08J; C08J5/00; C08J5/18; C08L23/04; C08L23/08; C08L23/0807; C08L23/0815; C08L23/0846; C08L23/0853; C08L51/00; C08L51/06; C08J2323/00; C08J2323/02; C08J2323/10; C08L2205/00; C08L2205/02; C08L2205/03; C08L23/06; C08L23/0869
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
148 words
A mat film or sheet prepared from a polymer blend comprising component (A); 10 to 90 % by weight of a propylene polymer or copolymer, and component (B); 90 to 10 % by weight of an ethylene-α-(C₃-₁₂ olefin) copolymer satisfying the following conditions (I) to (III): (I) a density of 0.860 to 0.910 g/cm³; (II) a maximum peak temperature of not lower than 100 °C as measured by DSC (differential scanning calorimetry); (III) a content of insolubles in boiling n-hexane of not lower than 10 % by weight; wherein said mat film or sheet is prepared by extruding or molding said polymeric blend at a temperature of 180°C to 280 °C to provide a film or sheet, followed by cooling the resulting film or sheet to a temperature below 50 °C to give a mat film or sheet having a gloss (60°) of not more than 30 %.
Claim 2
Dependent Claim
226 words
A mat film or sheet prepared from a polymer blend comprising component (A); 10 to 80 % by weight of a propylene polymer or copolymer, component (B); 5 to 30 % by weight of an ethylene-α-(C₃-₁₂ olefin) copolymer satisfying the following conditions (I) to (III): (I) a density of 0.860 to 0.910 g/cm³; (II) a maximum peak temperature of not lower than 100 °C as measured by DSC (differential scanning calorimetry); (III) a content of insolubles in boiling n-hexane of not lower than 10 % by weight; component (C); 5 to 85 % by weight of at least one component selected from the group consisting of high-pressure radical polymerization process ethylene polymers or copolymers and polyolefin-based modified resins which have been modified by a monomer selected from the group consisting of a) carboxylic acid group-, carboxylic acid ester group- or acid anhydride group-containing monomers, b) epoxy group-containing monomers, c) hydroxyl group-containing monomers, d) amino group-containing monomers, e) alkenyl cyclic imino ether derivative monomers, and f) multifunctional monomers, wherein said mat film or sheet is prepared by extruding or molding the above-described polymeric blend at a temperature of 180°C to 280 °C to provide a film or sheet, followed by cooling the resulting film or sheet to a temperature below 50°C to give a film or sheet having a gloss (60°) of not more than 30 %.
Claim 3
Dependent Claim
36 words
A mat film or sheet according to Claim 2, wherein said high-pressure radical polymerization process ethylene polymer or copolymer is an ethylene-vinylester copolymer, an ethylene -α , β-unsaturated carboxylic acid copolymer or carboxylic acid derivative thereof.
Claim 4
Dependent Claim
17 words
A mat film or sheet according to Claim 3, wherein said ethylene-vinylester copolymer is an ethylene-vinylacetate copolymer.
Claim 5
Dependent Claim
26 words
A mat film or sheet according to Claim 3, wherein said ethylene-α , β-unsaturated carboxylic acid copolymer or carboxylic acid derivative thereof is an ethylene-ethylacrylate copolymer.
Claim 6
Dependent Claim
83 words
A mat film or sheet according to any of the claims 1 to 5, wherein said propylene polymer or copolymer as component (A) has a MFR of 1 to 20 g/10 min; said ethylene-α-olefin copolymer as component (B) or said high-pressure radical polymerization process ethylene polymer or copolymer, and said polyolefin-based modified resin as component (C) have a MFR of 0.1 to 2.0 g/10 min; and the MFR ratio of component (A) to (B) is in a range of from 5 to 20.
Claim 7
Dependent Claim
35 words
A mat film or sheet according to any of the claims 1 to 6, wherein the difference in crystallization temperature of said component (A) from (B), or (A) from (C) is not less than 5°C.
Claim 8
Dependent Claim
72 words
A mat film or sheet according to any of the claims 1 to 7, wherein said polymeric blend further comprises 1 to 150 parts by weight of at least one of the components selected from the group consisting of inorganic fillers as component (D) and flame retardants as component (E), on the basis of 100 parts by weight of said components (A) + (B), or said components (A) + (B) + (C).
Claim 9
Dependent Claim
19 words
A mat film or sheet according to claim 8, wherein said inorganic filler as component (D) is calcium carbonate.
Claim 10
Dependent Claim
18 words
A mat film or sheet according to claim 8, wherein said flame retardant is an organic flame retardant.
Claim 11
Dependent Claim
18 words
A mat film or sheet according to claim 8, wherein said flame retardant is an inorganic flame retardant.
Claim 12
Independent Claim
142 words
A method for the preparation of a mat film or sheet comprising molding a polymeric blend at 180 to 280 °C to provide a film or sheet, wherein the polymeric blend comprises the following components (A) and (B): component (A); 10 to 90 % by weight of a propylene polymer or copolymer, and component (B); 90 to 10 % by weight of an ethylene-α-(C₃₋₁₂ olefin) copolymer satisfying the following conditions (I) to (III): (I) a density of 0.860 to 0.910 g/cm³; (II) a maximum peak temperature of not lower than 100 °C as measured by DSC (differential scanning calorimetry); (III) a content of insolubles in boiling n-hexane of not lower than 10 % by weight; cooling the resulting film or sheet to a temperature below 50°C to give a film or sheet having a gloss (60°) of not more than 30 %.
Claim 13
Independent Claim
224 words
A method for the preparation of a mat film or sheet comprising molding a polymeric blend at 180 to 280 °C to provide a film or sheet, wherein the polymeric blend comprises the following components (A) to (C): component (A); 10 to 90 % by weight of a propylene polymer or copolymer, component (B); 90 to 10 % by weight of an ethylene-α-(C₃-₁₂ olefin) copolymer satisfying the following conditions (I) to (III): (I) a density of 0.860 to 0.910 g/cm³; (II) a maximum peak temperature of not lower than 100 °C as measured by DSC (differential scanning calorimetry); (III) an insolubles in boilingn-hexane of not lower than 10 % by weight; and component (C); 5 to 85 % by weight of at least one of the components selected from the group consisting of high-pressure radical polymerization process ethylene polymers or copolymers and polyolefin-based modified resins which have been modified by use of a monomer selected from the group consisting of a) carboxylic acid group-, carboxylic acid ester group- or acid anhydride group-containing monomers, b) epoxy group-containing monomers, c) hydroxyl group-containing monomers, d) amino group-containing monomers, e) alkenyl cyclic imino ether derivative monomers, and f) multifunctional monomers, and cooling the resulting film or sheet to a temperature below 50°C to give a film or sheet having a gloss (60°) of not more than 30 %.
Claim 14
Dependent Claim
75 words
A method for the preparation of a mat film or sheet according to claim 12 or 13, wherein said polymeric blend further comprises 1 to 150 parts by weight of at least one of the components selected from the group consisting of inorganic fillers as component (D) and flame retardants as component (E), on the basis of 100 parts by weight of said components (A) + (B), or said component (A) + (B) + (C).
Claim 15
Dependent Claim
46 words
A method for the preparation of a mat film or sheet according to claim 12, 13, or 14, wherein said molding is conducted by T-die method, and said cooling is conducted by contacting the resulting film or sheet with a mat roll and a touch roll.
Claim 16
Dependent Claim
32 words
A method for the preparation of a mat film or sheet according to claim 15, wherein said touch roll have a rubber-made surface layer having a Shore hardness of 70 to 90.
Claim 17
Dependent Claim
30 words
A method for the preparation of a mat film or sheet according to claim 15, wherein said mat roll is cooled by an inner circulation method using a fluid coolant.
References Cited (Backward Citations)
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