Modified polyolefin resin for glass fiber treatment, surface-treated glass fiber, and fiber-reinforced polyolefin resin
AssigneePrime Polymer Co., Ltd.
InventorsKoki Yano, Rikuo Onishi
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Abstract
An acid-modified polyolefin-based resin for glass fiber treatment having: (1) an amount of components extractable with boiling methyl ethyl ketone of 8 mass % or less; (2) a number average molecular weight (Mn), measured by gel permeation chromatography (GPC), of 6,000 to 48,000; and (3) an amount of an acid which has been added, measured by Fourier transform infrared spectroscopy, of 0.1 to 12 mass %.
Claims12
A molded article, comprising a surface-treated glass fiber that comprises
- a surface to which a sizing agent comprising a maleic acid-modified polypropylene-based resin and a silane coupling agent adhere,
- wherein the acid-modified polyolefin resin comprises (1) an amount of components extractable with boiling methyl ethyl ketone of 8 mass % or less;
- (2) a number average molecular weight (Mn), measured by gel permeation chromatography (GPC), of 6,000 to 48,000;
- and (3) an amount of an acid which has been added, measured by Fourier transform infrared spectroscopy, of 0.1 to 12 mass %
- the fiber diameter of the glass fiber being 3 to 30 μm,
- wherein the molded article has a fatigue strength under oscillation at 80 MPa and 10 Hz of at least 5000 times.
A molded article, comprising a fiber-reinforced polyolefin-based resin comprising a surface-treated glass fiber that comprises
- a surface to which a sizing agent comprising a maleic acid-modified polypropylene-based resin and a silane coupling agent adhere,
- wherein the acid-modified polyolefin resin comprises (1) an amount of components extractable with boiling methyl ethyl ketone of 8 mass % or less;
- (2) a number average molecular weight (Mn), measured by gel permeation chromatography (GPC), of 6,000 to 48,000;
- and (3) an amount of an acid which has been added, measured by Fourier transform infrared spectroscopy, of 0.1 to 12 mass %,
- the fiber diameter of the glass fiber being 3 to 30 μm
- wherein an aspect ratio of the glass fiber (average fiber length/average fiber diameter) being 50 to 6000, and
- wherein the molded article has a fatigue strength under oscillation at 80 MPa and 10 Hz of at least 5000 times.
A molded article comprising a long fiber-reinforced polyolefin-based resin pellet that comprises a surface-treated glass fiber and a polypropylene-based resin comprising a maleic acid-modified polypropylene-based resin, wherein the pellet has a length of 2 to 200 mm, wherein
- the surface-treated glass fiber comprises
- a surface to which a sizing agent comprising a maleic acid-modified polypropylene-based resin and a silane coupling agent adhere,
- wherein the acid-modified polyolefin resin comprises (1) an amount of components extractable with boiling methyl ethyl ketone of 8 mass % or less;
- (2) a number average molecular weight (Mn), measured by gel permeation chromatography (GPC), of 6,000 to 48,000;
- and (3) an amount of an acid which has been added, measured by Fourier transform infrared spectroscopy, of 0.1 to 12 mass %,
- the fiber diameter of the glass fiber being 3 to 30 μm
- wherein an aspect ratio of the glass fiber (average fiber length/average fiber diameter) being 50 to 6000, and
- wherein the molded article has a fatigue strength under oscillation at 80 MPa and 10 Hz of at least 5000 times.
Dependencies are inferred from the claim text.