US 12,134,261 B2
Self-adhesive prepreg and method for producing same
Atsushi Kawakami, Tokyo (JP); Matthias Schubert, Tokyo (JP); and Toru Kaneko, Tokyo (JP)
Assigned to Teijin Limited, Osaka (JP)
Appl. No. 16/496,569
Filed by Teijin Limited, Osaka (JP)
PCT Filed Mar. 22, 2018, PCT No. PCT/JP2018/011556
§ 371(c)(1), (2) Date Sep. 23, 2019,
PCT Pub. No. WO2018/174217, PCT Pub. Date Sep. 27, 2018.
Claims priority of application No. 2017-058272 (JP), filed on Mar. 23, 2017.
Prior Publication US 2021/0107250 A1, Apr. 15, 2021
Int. Cl. B32B 5/26 (2006.01); B29B 11/16 (2006.01); B29B 15/12 (2006.01); B29C 70/68 (2006.01); B29C 70/78 (2006.01); B29K 63/00 (2006.01); B29K 307/04 (2006.01); B29L 31/60 (2006.01); B32B 3/12 (2006.01); B32B 5/02 (2006.01); B32B 7/12 (2006.01); B32B 37/12 (2006.01); B32B 37/14 (2006.01)
CPC B32B 5/26 (2013.01) [B29B 11/16 (2013.01); B29B 15/12 (2013.01); B29C 70/682 (2013.01); B29C 70/78 (2013.01); B32B 3/12 (2013.01); B32B 5/022 (2013.01); B32B 5/024 (2013.01); B32B 7/12 (2013.01); B32B 37/12 (2013.01); B32B 37/146 (2013.01); B29K 2063/00 (2013.01); B29K 2307/04 (2013.01); B29L 2031/608 (2013.01); B32B 2260/021 (2013.01); B32B 2260/046 (2013.01); B32B 2262/0284 (2013.01); B32B 2262/106 (2013.01); B32B 2305/024 (2013.01); B32B 2305/076 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A self-adhesive prepreg comprising:
a base prepreg including reinforcing fibers, and a thermosetting resin composition (I) that is partially or entirely impregnated into a reinforcing fiber layer that is formed of the reinforcing fibers; and
an adhesive layer including a nonwoven fabric that is laminated on at least one surface of the base prepreg so as to be integrated with the base prepreg, and a thermosetting resin composition (II) layer that is laminated on a surface of the nonwoven fabric so as to be integrated with the nonwoven fabric
wherein
the base prepreg contains the thermosetting resin composition (I) by 30 to 50% by mass,
the thickness of the base prepreg is 60 to 500 μm,
the content of the thermosetting resin composition (II) is 100 to 300 g/m2,
the thermosetting resin composition (I) and the thermosetting resin composition (II) are compatible and are mixed at the time of pressure molding,
the thermosetting resin composition (I) and the thermosetting resin composition (II) has a minimum resin viscosity of 0.1 to 100 Poise,
the nonwoven fabric is formed of thermoplastic resin,
the thickness of the nonwoven fabric is 0.15 to 1.0 mm,
the mass per unit area of the nonwoven fabric is 10 to 50 g/m2, and
the nonwoven fabric has a 10% extension load of 35 N or less.