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US 10,293,367 B2Granted
Waterproof tape having improved adhesion and manufacturing method thereof
AssigneeNdfos Co., Ltd.
InventorChang Hoo Lee
Life of this patent
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Abstract
The present invention provides a waterproof tape having improved adhesion which comprises a filler layer having formed on one side of a base film to exhibit excellent viscosity while being thin and has excellent shock resistance and an excellent waterproof property, and a manufacturing method.
Claims8
A method for manufacturing a waterproof tape having improved adhesion, comprising:
- preparing a base film;
- disposing an adhesive layer on one side of the base film;
- and
- disposing a filler layer on another side of the base film by coating a paste including an acrylic binder and a shock resistant filler having a plurality of hollow fine particles,
- wherein the plurality of hollow fine particles are manufactured by the steps of:
- preparing hydrocarbon dispersion by adding 2-20 parts by weight of liquid hydrocarbon with respect to a total of 100 parts by weight of the hollow fine particles and a dispersing agent having a surfactant into water;
- preparing a particulate crystal by adding 15-40 parts by weight of a thermoplastic material into the hydrocarbon dispersion, with respect to the total of 100 parts by weight of the hollow fine particles, and forming a first coating film by the thermoplastic material surrounding the dispersed liquid hydrocarbon;
- forming an unexpanded microsphere by heating the particulate crystal and removing the dispersed liquid hydrocarbon;
- and
- forming an expanded microsphere constituting each of the plurality of hollow fine particles by heating the unexpanded microsphere and expanding the first coating film.
7 more elements
Dependencies are inferred from the claim text.