Method of producing a support for polyurethane-based imitation leather free of dimethylformamide (DMFa) or other solvents or water, and related method of producing an imitation leather
AssigneeCondor Trade S.R.L.
InventorsVirginio Abbondio Fidanza, Emanuele Ventura
Life of this patent
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Abstract
A method for producing a support for polyurethane-based imitation leather free of dimethylformamide or other solvents or water involves preparing a base. A two-component polyurethane layer is sprayed on the base which includes preparing a first component and a second component. The first and second components are combined to obtain a mixture, and the mixture is sprayed uniformly on the base forming the polyurethane layer. A backing is applied on the two-component polyurethane layer forming a support and the support is dried.
Claims20
A method for producing a support for polyurethane-based imitation leather free of dimethylformamide (DMFa) or other solvents or water, comprising:
- preparing a base having a width;
- spraying a two-component polyurethane layer on the base, the step of spraying a two-component polyurethane layer on the base comprising:
- preparing a first component and a second component of the two-component polyurethane layer;
- combining the first and second components to obtain a mixture;
- and spraying the mixture uniformly on the base forming the two-component polyurethane layer without a further step of leveling using a blade;
- applying a backing on the two-component polyurethane layer forming a support;
- and
- drying the support;
- wherein spraying the mixture uniformly on the base comprises translating a spray system along a width of the base while said base runs at a constant speed beneath the spray system.
A method for producing an imitation leather free of dimethylformamide (DMFa) or other solvents, comprising the steps of:
- preparing a base;
- spreading with a blade at least one polyurethane layer on the base and drying the at least one polyurethane layer;
- applying an adhesive layer on a last polyurethane layer;
- preparing a support for polyurethane-based imitation leather free of dimethylformamide (DMFa) or other solvents or water with a method comprising the steps of:
- preparing a base having a width;
- spraying a two-component polyurethane layer on the base, the step of spraying a two-component polyurethane layer on the base comprising:
- preparing a first component and a second component of the two-component polyurethane layer;
- combining the first and second components to obtain a mixture;
- and spraying the mixture uniformly on the base forming the two-component polyurethane layer without a further step of leveling using a blade, wherein spraying the mixture uniformly on the base comprises translating a spray system along the width of the base while said base runs at a constant speed beneath the spray system;
- applying a backing on the two-component polyurethane layer forming a support;
- and
- drying the support;
- removing the base and rolling up the support to form a roll;
- applying the support on the adhesive layer;
- and
- removing the base.
A method for producing an imitation leather free of dimethylformamide (DMFa) or other solvents, comprising:
- preparing a base having a width;
- spreading with a blade at least one polyurethane layer on the base and drying the at least one polyurethane layer;
- spraying a two-component polyurethane layer on the base, the spraying the two-component polyurethane layer on the base comprising:
- preparing a first component and a second component of the two-component polyurethane layer;
- combining the first and second components to obtain a mixture;
- and spraying the mixture uniformly on the base forming the two-component polyurethane layer without further leveling using a blade;
- applying a backing on the two-component polyurethane layer;
- drying the two-component polyurethane layer;
- and
- removing the base,
- wherein spraying the mixture uniformly on the base comprises translating a spray system along a width of the base while said base runs at a constant speed beneath the spray system.
Dependencies are inferred from the claim text.