Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Composite having voids in a component
Patent
1995-11-22
1997-02-11
Krynski, William
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Composite having voids in a component
4283084, 4283105, 4284111, 428447, 4284744, 428480, 428500, 428524, 428913, B32B 326
Patent
active
056019114
ABSTRACT:
This invention provides a capsule type retroreflective sheeting excelling in strength and longterm weatherability, the connecting walls, which partially connect the light-transmitting protective film and support film while retaining the spaces between the two films, being free of internal flaws such as deficiently filled portions and having uniform structure and shape. The capsule type retroreflective sheeting in which the connecting walls are formed by partially thermofusing and thermoforming the support film is characterized in that the support film is composed of a resin composition which contains a thermofusible rein and a crosslinking agent, said thermofusible resin having a shearing stress at 180.degree. C. within a range of 9.times.10.sup.3 .times.1.times.10.sup.5 dyne/cm.sup.2, and which can form a non-fusible crosslinked resin having a shearing stress at 180.degree. C. of at least 1.times.10.sup.6 dyne/cm.sup.2 after the crosslinkage.
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Ochi Katsura
Ogawa Manabu
Tanaka Osamu
Krynski William
Nippon CarbideKogyo Kabushiki Kaisha
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