Insulating composition of mineral wool and cotton wool

Abstract

The invention is an insulating composition (30) comprising at least mineral wool fibers (31) and cotton wool fibers (32). Figure to be published with the abstract: Fig. 1

Description

Title of the invention: Insulating composition of mineral wool and cotton wool

[0001] Technical domain.

[0002] The invention relates to an insulating composition.

[0003] The invention relates to the technical field of insulation and more particularly to insulation to be installed by projection and by blowing.

[0004] State of the art.

[0005] It is known to use insulating products based on mineral wool. These manufactured products are very good thermal insulators, thanks to their fibrous structure, and are quick and easy to install. However, over time, the rolls and panels tend to settle and lose their effectiveness. Their installation is difficult and creates thermal bridges.

[0006] Glass wool is known to be difficult to recycle. Glass wool can cause irritation to the user, who must therefore use protective equipment.

[0007] It is also known to use plant-fiber-based insulation, such as shredded clothing blown in using a blowing process. However, this type of insulation requires specific machinery, increasing investment and installation time for professionals.

[0008] An objective of the invention is to offer an environmentally friendly and more user-friendly insulating composition, with thermal insulation performance as satisfactory as that of mineral wool, and usable in all traditional blowing machines.

[0009] Presentation of the invention.

[0010] The invention relates to an insulating composition comprising at least mineral wool nodules and cotton wool fibers.

[0011] The use of cotton wool fibers in addition to mineral wool allows this composite to have good mechanical strength, particularly resistance to settling, and to maintain long-term effectiveness while also limiting its environmental impact. The cotton wool can be replaced by any other type of plant-based wool, such as hemp or cellulose wadding.

[0012] Cotton wool allows for humidity regulation and provides good thermal lag. Blown glass wool insulates and is non-combustible, offering very good resistance to settling.

[0013] Mineral wool nodules and cotton wool fibers form reinforcement fibers organized in a network, making it possible to obtain an insulating product whose per The properties are equivalent to those of mineral wool alone. Furthermore, using a composition containing cotton wool reduces the environmental impact and user discomfort compared to a product using only mineral wool nodules, such as glass wool or other mineral-based products.

[0014] The mixture allows it to be easily used in machines for the insulation of new buildings as well as buildings under renovation.

[0015] Other advantageous features of the invention are listed below. Each of these features can be considered alone or in combination with the notable features defined below. Each of these features contributes, where appropriate, to solving specific technical problems defined further in the description and in which the notable features defined above do not necessarily participate.

[0016] Advantageously, mineral wool is glass wool.

[0017] In one embodiment it is possible to use rock wool instead of glass wool.

[0018] Advantageously, the glass wool is frayed and the cotton wool is untied before mixing.

[0019] Grinding glass wool produces glass wool nodules. Grinding is carried out using glass wool panels or rolls.

[0020] The cotton wool used is preferably in the form of compressed cotton bales. Unraveling the bales yields cotton wool fibers. It is also possible to use cotton wool panels or rolls; in this case, a shredding process is used.

[0021] Advantageously, the cotton wool fibers are unbound to obtain fibers with a length between 1 mm and 40 mm.

[0022] Obtaining glass wool nodules and cotton wool fibers makes it easier to mix.

[0023] Advantageously, the composition includes a fire-resistant coating, for example comprising a flame-retardant compound with regard to cotton or other textiles.

[0024] As examples of fire-resistant coatings, those skilled in the art may refer to patent publication WO2017080633.

[0025] The fireproofing treatment is carried out by spraying or dipping. This treatment prevents the composition from catching fire upon contact with heat sources.

[0026] Advantageously, the composition includes an antistatic coating, for example comprising a surfactant, for example based on polyols or polyethylene glycol esters.

[0027] The antistatic coating is applied by spraying. The use of a coating The antistatic properties allow for comfortable installation, notably by preventing electrical discharges.

[0028] Advantageously, the composition includes a water-repellent coating, for example containing silicone.

[0029] Advantageously, the water-repellent coating can be added / integrated into the composition by spraying.

[0030] Advantageously, the composition comprises between 1% and 90% cotton wool.

[0031] Advantageously, the composition comprises between 10% and 99% glass wool.

[0032] Advantageously, glass wool includes a binder.

[0033] The binder holds the glass wool fibers in nodule form. In one embodiment, the binder is sugar-based. In another embodiment, the binder is formaldehyde-based. In one embodiment, the binder holds the composition in panel or roll form.

[0034] Advantageously, the composition includes at least one additional type of fiber.

[0035] The additional fiber is preferably a natural fiber. The additional fiber is, for example, hemp or cellulose wadding.

[0036] The invention also relates to an insulating product remarkable in that it comprises the insulating composition.

[0037] The invention also relates to the use of the composition as an insulating product, particularly in buildings.

[0038] Advantageously, the composition is sprayed or blown.

[0039] The composition is sprayed or blown so that the fiber mixture is distributed homogeneously. The mixture is homogeneous in its packaging and before installation.

[0040] Advantageously, the composition is compacted in the form of panels and / or rolls.

[0041] The panels and / or rolls can be used directly in this form for insulation. In one embodiment, they can be in this format for transport and handling and then crushed at the time of spraying.

[0042] The invention also relates to a method for manufacturing the insulating composition. The method is remarkable in that it comprises the following steps:

[0043] Supply of glass wool and cotton wool;

[0044] Shredding of glass wool to obtain glass wool nodules,

[0045] Dissociation of cotton wool into cotton wool nodules,

[0046] Mixture of glass wool fibers and cotton wool fibers to form the insulating composition in the form of nodules.

[0047] The transformation of glass wool into glass wool nodules and the transformation of cotton wool into cotton wool nodules makes it easier to fiber blending. For example, an opener can be used for the operation of transforming cotton wool into nodules.

[0048] The fiber mixture is suitable for blowing, thus providing homogeneous insulation to the surface over which the mixture is spread, particularly in the form of a mattress.

[0049] Advantageously, the process includes a step of treating the composition, said treatment being immersion, in particular immersion of the composition in a bath of a fire-resistant composition or fire-resistant spray, followed by drying in an oven or autoclave and then spraying, in particular spraying of the composition with an antistatic agent. Alternatively, the process includes a step of treating the composition, said treatment being spraying, in particular spraying of the composition with a fire-resistant composition and an antistatic agent.

[0050] Advantageously, the process includes a step of treating glass wool by spraying and a step of treating cotton wool by soaking.

[0051] Brief description of the figures.

[0052] Other advantages and features of the present invention are now described by means of purely illustrative and in no way limiting examples of the scope of the invention, and from the accompanying drawings, in which the various figures represent:

[0053] [Fig. 1] schematically represents the manufacturing process of the composition according to a first embodiment.

[0054] [Fig.2] schematically represents the manufacturing process of the composition according to a second embodiment.

[0055] [Fig.3] schematically represents the manufacturing process of the composition according to a third embodiment.

[0056] In the following description, identical elements, by structure or by function, appearing on different figures retain, unless otherwise specified, the same references.

[0057] Description of embodiments.

[0058] The raw materials used in this manufacturing process of the insulating composition 30 shown schematically in [Fig. 1] are panels and / or rolls of mineral wool 31, preferably glass wool, and bales of cotton wool 32. The glass wool panels and / or rolls 31 are first shredded 38 to obtain glass wool nodules 40. The cotton wool bales 31 are separated 39 to obtain cotton wool fibers 41 with a length between 1 mm and 40 mm.

[0059] . The cotton wool fibers 41 and the glass wool nodules 40 are aspirated towards a blowing machine in which they are stirred and mixed 42. The mixture comprises between 1% and 90% cotton wool fibers 41 and between 10% and 99% of glass wool nodules 40.

[0060] In a particular embodiment shown schematically in [Fig.2], a third type of nodules 37 is added to the blowing machine to be mixed with the cotton wool fibers 41 and the glass wool nodules 40.

[0061] Once the cotton wool nodules 41 and the glass wool nodules 40 are mixed, they undergo an antistatic treatment 34 followed by a fire-resistant treatment 33. The antistatic treatment 34 is carried out by spraying the cotton wool / glass wool mixture with an antistatic composition comprising a surfactant, for example, based on polyols or polyethylene glycol esters, thus preventing the installer from receiving electric shocks. The fire-resistant treatment 33 is carried out by spraying the cotton wool / glass wool mixture, which has the antistatic coating, with a fire-resistant aerosol containing a flame retardant, to prevent the composition from catching fire when it is near a heat source. Alternatively, the fire-resistant treatment 33 can be carried out by soaking the cotton wool / glass wool mixture.

[0062] According to a second embodiment shown in [Fig.3], the fireproofing treatment 33 is sprayed onto the glass wool nodules and the antistatic treatment 34 is carried out on the cotton wool fibers 41 before the mixing 42 of said glass wool nodules and said cotton wool fibers.

[0063] In a particular embodiment of the invention, the composition 30 undergoes a water-repellent treatment 35. The water-repellent treatment 35 is carried out by spraying silicone.

[0064] The composition 30 is treated and then calibrated for packaging in bags. The bags contain the treated composition ready to be sprayed 44 for insulation.

[0065] In another embodiment, a sugar- or formaldehyde-based binder 36 is added to the composition 30 to form it into panels and / or rolls. The panels and / or rolls can then be ground for pulverization 44.

[0066] The preceding description clearly explains how the invention makes it possible to achieve the objectives it has set for itself, namely to offer an insulating composition allowing homogeneous insulation which prevents settling and which is usable in all traditional blowing machines, by offering a homogeneous insulating composition comprising at least mineral wool fibers and cotton wool fibers.

[0067] In any event, the invention cannot be limited to the embodiments specifically described in this document, and extends in particular to all equivalent means and to any technically operative combination of these means and with different products from recycling.

Claims

Demands

1. A method for manufacturing an insulating composition (30), characterized in that the method comprises the following steps of: a) Supplying glass wool (31) and cotton wool (32); b) Shredding (38) the glass wool (31) to obtain glass wool nodules (40), c) Dissociating (39) the cotton wool (32) into cotton wool fibers (41), d) Mixing (42) the glass wool nodules (40) and the cotton wool fibers (41) to form the insulating composition (30) in nodule form.

2. A method for manufacturing an insulating composition (30) according to claim 1, characterized in that the method comprises a step e) after step d), of treating (43) the composition, said treatment (43) being a soaking and a spraying.

3. A method for manufacturing an insulating composition according to claim 1, characterized in that the method comprises a step b' of treating (43) glass wool (31) by spraying and a step of treating (43) cotton wool (32) by soaking.

4. Insulating composition (30) obtained by the process according to any one of claims 1 to 3, said composition comprising at least mineral wool nodules (31) and cotton wool fibres (32), said mineral wool being glass wool, said glass wool (31) is shredded and the cotton wool (32) is unbound before mixing.

5. Insulating composition according to any one of claims 4, characterized in that it comprises a fire-resistant coating (33).

6. Insulating composition according to any one of claims 4 to 5, characterized in that it comprises an antistatic coating (34).

7. Insulating composition according to any one of claims 4 to 6, characterized in that it comprises a water-repellent coating (35).

8. Insulation composition according to any one of claims 4 to 7, characterized in that the composition comprises between 1% and 90% cotton wool (32).

9. Insulation composition according to any one of claims 4 to 8, characterized in that the composition comprises between 10% and 99% glass wool (31).

10. Insulating composition according to any one of claims 4 to 9, characterized in that glass wool includes a binder (36).

11. Insulating composition according to any one of claims 4 to 10, characterized in that it comprises at least one additional type of fiber (37).

12. Insulating product characterized in that it comprises the insulating composition (30) according to any one of claims 4 to 11.

13. Use of a composition (30) according to any one of claims 4 to 11 as an insulating product.

14. Use according to claim 13 in which composition (30) is sprayed.

15. Use according to claim 13, wherein composition (30) is blown.

16. Use according to claim 13 wherein the composition (30) is compacted in the form of panels and / or rolls.

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