Method for baking a continuous mat of mineral or plant fibers
AssigneeSaint-Gobain Isover
InventorsChristine Nguyen, Francois Vianey, Arnaud Letourmy
Life of this patent
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Abstract
A method for baking a continuous mat of mineral or plant fibers successively includes application of an aqueous solution, containing a binder diluted in the solution, onto mineral or plant fibers, shaping of the fibers to form a continuous mat on a conveyor in motion, and heating the mat in movement through an oven by a hot air flow at a temperature higher than the curing temperature of the binder. Furthermore, at least partial drying of the mat is carried out before entry into the oven. The at least partial drying includes irradiation of the mat in movement with radiofrequency electromagnetic waves whose frequency lies between 3 MHz and 300 GHz.
Claims10
A method for baking a continuous mat of mineral or plant fibers, or of glass or rock type, successively comprising:
- application of an aqueous solution, containing a binder diluted in the solution, onto mineral or plant fibers;
- shaping of the fibers to form a continuous mat on a conveyor in motion;
- heating the mat in movement through an oven by a hot air flow at a temperature higher than a curing temperature of the binder;
- at least partial drying of the mat before entry into any oven for heating, the at least partial drying including irradiation of the mat in movement with radiofrequency electromagnetic waves whose frequency lies between 3 MHz and 300 GHz,
- wherein during the at least partial drying of the mat before entry into any oven for heating, air at a temperature less than curing temperature of the binder is blown onto the mat in an irradiation zone to remove moisture,
- wherein the oven includes a plurality of compartments, and
- wherein one or more of the compartments introduces hot air from a bottom of the oven in a direction transverse to a direction of movement of the mat and the hot air is extracted though a top of the oven, and one or more of the compartments introduce hot air from the top of the oven in a direction transverse to the direction of movement of the mat and the hot air is extracted through the bottom of the oven.
A method for baking a continuous mat of mineral or plant fibers, or of glass or rock type, successively comprising:
- application of an aqueous solution, containing a binder diluted in the solution, onto mineral or plant fibers, the application being made by spraying or atomization in fractions of binder solution;
- shaping of the fibers to form a continuous mat on a conveyor in motion;
- heating the mat in movement through an oven by a hot air flow at a temperature higher than a curing temperature of the binder;
- at least partial drying of the mat before entry into the oven, the at least partial drying including irradiation of the mat in movement with radiofrequency electromagnetic waves whose frequency lies between 3 MHz and 300 GHz,
- wherein during the at least partial drying of the mat before entry into any oven for heating, air at a temperature less than curing temperature of the binder is blown onto the mat in an irradiation zone to remove moisture,
- wherein the oven includes a plurality of compartments, and
- wherein one or more of the compartments introduces hot air from a bottom of the oven in a direction transverse to a direction of movement of the mat and the hot air is extracted though a top of the oven, and one or more of the compartments introduce hot air from the top of the oven in a direction transverse to the direction of movement of the mat and the hot air is extracted through the bottom of the oven.
Dependencies are inferred from the claim text.