초록 ▼

A laminate is provided that comprises flexible moisture permeable adherends and a moisture permeable adhesive. The laminate has good moisture transmitting characteristics with good bond strength. The laminate finds utility in functional applications such as shoes. A particular group of laminates are

A laminate is provided that comprises flexible moisture permeable adherends and a moisture permeable adhesive. The laminate has good moisture transmitting characteristics with good bond strength. The laminate finds utility in functional applications such as shoes. A particular group of laminates are provided that provide for both waterproof characteristics and breathability.

대표청구항 ▼

A laminate comprising: (i) flexible adherends having a combined moisture permeability of at least 140 g/m2×24 hr., and adhered by (ii) an adhesive having a moisture permeability of at least 1000 g/m2×24 hr. in a continuous film of at least 25 micron thickness; said adhesive being a one-component, hy

A laminate comprising: (i) flexible adherends having a combined moisture permeability of at least 140 g/m2×24 hr., and adhered by (ii) an adhesive having a moisture permeability of at least 1000 g/m2×24 hr. in a continuous film of at least 25 micron thickness; said adhesive being a one-component, hydrophilic, block polyurethane consisting of both hard and soft segments; the soft segment being a polyol containing oxyethylene units, the hard segment being the reaction product of polyisocyanate and chain extender; said polyol having a number average molecular weight of from about 600 to about 3500 and having a functionality of at least 2; said isocyanate having a functionality of at least 2; and said chain extender having a molecular weight in a range lower than about 500 and having a functionality of at least 2; wherein the reactants are employed in such proportions so as to satisfy the following equations: [Figure] wherein EqNCO is the equivalent of the isocyanate species employed, and EqOH and EqCE denote the respective molar equivalents of the polyol and chain extender employed, the soft segments being provided by the polyol of primarily oxyethylene units, and the suitable hard segments being provided by the reaction product of the isocyanate and chain extender and which induce phase-separation of the hard and soft segments; and wherein the laminate has a moisture permeability of at least 120 g/m2×24 hr., and a wet bond strength of at least 0.3 kgf/cm.