Production of elastomeric films

摘要

A method for producing multi-layered elastomeric film or article, the method comprising: (i) dipping a mold into a composition for producing an elastomeric film having a total solids content of between 5%-40% to produce a layer of elastomeric film composition on the mold, (ii) partially drying the layer of elastomeric film composition on the mold to reduce the total water content of the elastomeric film composition to a level of not less than 22%, (iii) dipping the mold coated with the partially dried layer of elastomeric film composition into a composition for producing an elastomeric film having a total solids content of between 5%-40% to produce a further layer of elastomeric film composition on the mold, (iv) optionally repeating the partial drying step (ii) and the further dipping step (iii), and (v) drying and curing the layers of elastomeric film composition on the mold.

主权项

1. A method for producing a multi-layered elastomeric film or article, the method comprising:
(a) dipping a mould into a dipping tank comprising a coagulant containing multivalent ions in solution, to produce a coagulant dipped mould, (b) dipping the coagulant-dipped mould into a dipping tank comprising a first composition for producing an elastomeric film having a total solids content of between 5%-20% to produce a layer of elastomeric film composition on the mould, (c) partially drying the layer of elastomeric film composition on the mould to reduce a total water content of the elastomeric film composition to a level of not less than 22%, (d) dipping the mould coated with the partially dried layer of elastomeric film composition into a dipping tank comprising a second composition for producing an elastomeric film having a total solids content of between 5%-40% to produce a further layer of elastomeric film composition on the mould, and (e) at least one of drying or curing the layers of elastomeric film composition on the mould.