Prepreg sheet, method for manufacturing same, unit layer with a covering material, method for manufacturing fiber-reinforced composite, and fiber-reinforced composite
AssigneeMitsubishi Chemical Corporation
InventorsMasahiro Ichino, Kazuhisa Ikeda, Satoshi Okamoto, Yuma Furuhashi
Life of this patent
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Abstract
A prepreg sheet (1) is formed by stacking a plurality of unit layers (10a, 10b) In the unit layers (10a, 10b), prepreg tapes (100), in which a reinforced fiber bundle is impregnated with a thermosetting matrix resin composition, are disposed in rows a plurality of times. One or more of the unit layers (10a, 10b) has a gap (G) between adjacent prepreg tapes (100), and the width thereof is 10% or less of the width of the narrower of the adjacent prepreg tapes (100).
Claims18
A prepreg sheet formed by laminating a plurality of unit layers comprising a plurality of arranged prepreg tapes in which a matrix resin composition is impregnated in a reinforced fiber bundle,
- wherein at least one unit layer has a gap between the adjacent prepreg tapes, and
- a width of the gap is from 0.1% to 10% of the width of adjacent prepreg tapes whichever is narrower, and
- in a temperature rising viscosity measurement in which the matrix resin composition is subjected to temperature rising at 2.0° C./minute, a lowermost viscosity is from 0.3 Pa·s to 20 Pa·s.
A unit layer comprising a covering material, comprising:
- the covering material;
- and
- a unit layer that is arranged on the covering material,
- wherein the unit layer comprises a plurality of arranged prepreg tapes having a gap,
- the prepreg tapes comprise a reinforced fiber bundle and a matrix resin composition, and
- a width of the gap is from 0.1% to 10% of the width of the adjacent prepreg tapes whichever is narrower, and
- in a temperature rising viscosity measurement in which the matrix resin composition is subjected to temperature rising at 2.0° C./minute, a lowermost viscosity is from 0.3 Pa·s to 20 Pa·s.
A method for manufacturing a prepreg sheet, the method comprising:
- repeating forming a unit layer by arranging a plurality of prepreg tapes in which a matrix resin composition is impregnated in a reinforced fiber bundle,
- in the repeating forming a unit layer, arranging a prepreg tape to have a gap between the adjacent prepreg tapes, and orienting the prepreg tape in a direction intersecting with an orientation direction of the prepreg tape of another unit layer, at least one time,
- wherein a width of the gap is from 0.1% to 10% of the width of the adjacent prepreg tapes whichever is narrower, and
- in a temperature rising viscosity measurement in which the matrix resin composition is subjected to temperature rising at 2.0° C./minute, a lowermost viscosity is from 0.3 Pa·s to 20 Pa·s.
Dependencies are inferred from the claim text.