SEALABLE SHEET

• Main Authors: Takashi HABU, Chie IINO, Yasumichi OHARA, Yuusaku SHIMIZU
• Format: Patent
• Language: English
• Published: 30.10.2019

SEALABLE SHEET A sealable sheet contains an epoxy resin, a novolak phenol resin, and a thermoplastic resin containing a carboxyl group, and a protruding length LI measured by the following method is 3 mm or less. In a state where the sealable sheet having a thickness of 260 ~m, a length of 5 cm, and a width of 5 cm is supported by a peeling sheet having the same length-width size as that of the sealable sheet, the sealable sheet is disposed on a one-side surface in a thickness direction of an alumina board having a length of 6 cm and a width of 6 cm so that the alumina board, the sealable sheet, and the peeling sheet are disposed to be sequentially aligned toward one side in the thickness direction, and then, the alumina board, the sealable sheet, and the peeling sheet are thermally pressed in the thickness direction at 70°C for 60 seconds at a strength of 360 N; and thereafter, the protruding length LI of the sealable sheet from the peeling sheet outwardly in a direction perpendicular to the thickness direction is measured. FIG. I