Mineral wool panel comprising a web which covers both faces thereof

Abstract

The invention relates to a mineral wool panel of increased structural strength, of the type of those used for the manufacture of air ducts, particularly airconditioning ducts, which are composed of a central core made of mineral wool, especially glass wool, coated on both faces with coatings, said core incorporating a web on the face located on the inside of the duct obtained, the panel of the invention being characterized in that it comprises a core (1) the surface faces of which, both the inner face and the outer face, each incorporate a respective web (2) extending over the totality of said faces, the two webs (2) being bonded to the surfaces of the core (1) by means of binders that can cure through the action of heat.

Description

FIELD OF THE INVENTION [0001] The invention relates to the field of insulating materials based on mineral wool and more particularly to materials intended for the manufacture of self-supporting ducts for distribution of air for ventilation or airconditioning. SUBJECT OF THE INVENTION [0002] The present invention relates to a mineral wool panel provided with a web covering both faces, which confers essential innovative characteristics and appreciable advantages over known means used for similar purposes in the prior art. [0003] The invention proposes more particularly the development of panels made of mineral wool, preferably, but not exclusively, glass wool, of the type of those used for the manufacture of self-supporting ducts for distributing conditioned air, which panels are provided with a web covering both faces, said web being prepared for subsequently receiving, by adhesion, any other coatings intended for the panel, in which said web covering both faces provides a substantia...

AI Technical Summary

Benefits of technology

[0010] The function of all these various forms of coating is to prevent the fibers from being torn off by the circulation of air in the duct.

[0018] The desired level of strength is generally obtained by improvements made to the core of the panel (which normally consists of mineral wool, generally glass wool, and synthetic resins that agglomerate it). These improvements consists in treating, or improving, the type of glass fiber and the binder that unites them, and also in increasing the density of the assembly formed by these components of the panel's core, among other things.

[0023] The desired increase in the structural strength of the panel is obtained according to the invention thanks to the increase in the surface strength and in the tensile strength conferred by the web on both faces, thereby making it possible to obtain ducts with greater resistance both to positive pressures and to negative pressures (pulse and return or suction ducts).

[0024] According to the invention, the web is placed on each of the faces or surfaces of the panel's core and may be based on glass fibers or organic polymer fibers, or may comprise mixtures of polyester fibers and glass fibers, which are woven together, or are nonwoven and bonded together by means of a synthetic binder or a synthetic resin, and may also incorporate, optionally, a reinforcement formed from yarns. In this way, a highly reinforced panel of greater structural strength is obtained, the behavior of which with respect to positive or negative pressures is substantially improved when it is used in the construction of ducts for airconditioning installations.

Problems solved by technology

Even though the various coating layers applied to the core of the panel are in theory beneficial for strengthening the panel, the increase in strength is not significant, or at the very least is insufficient in practice to give the panel a higher strength class, because of its uneven behavior that depends on the way in which the pressure is exerted on the inside of the duct.

It seems in fact that, for a panel incorporating a single web for the coating on the inside, the strength is not uniform owing to the fact that the web is present only on a single face of the duct.

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