FI63364C - LAGRING OCH TRANSPORT AV LJUD- ELLER VAERMEISOLERANDE FIBERMATERIAL - Google Patents

Description

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Patmt · och r * gi «tarstyr« lMn Aitatkin utl »* d odi utJukrtft · * pubUcerad ^ 0, 0 ^ (32) (33) (31)« uoMmm — S «gM priork · * (71) Tex Innovation AB, S- ^ 21 76 Västra Frolonda, Sweden-Sweden (SE) (72) Roshan lal Shishoo, Askim, Sweden-Sweden (SE) (7 * 0 Oy Jalo Ant-Wuorinen Ab (5l) Storage and transport of sound and western insulating fiber material -

Lagring och transport av ljud- eller varmeisolerande fiberaaterial

(6l) Addition to patent 6129 ^ - Tillägg till patent 6129U

The present invention relates to the further development of the method according to the main patent 61294, which means the pretreatment, packaging and post-treatment of a sound and heat insulating product consisting of inorganic fibers and an adhesive.

Sound and heat insulating products made of inorganic fibers require a lot of space. The costs of storing and transporting such substances have therefore been high. Among other things, this has led to the complete impossibility of exporting such products.

According to the main patent 61294, it has been found that by reducing the friction between the fibers in such a product, the product can be compressed considerably, but still achieve complete or virtually complete recovery after long-term storage. Recovery can then be accelerated by mechanical treatment such as shaking.

The main patent thus relates to a method for storing and transporting sound and heat insulating products consisting of inorganic fibers and adhesives, the product being compressed and packaged and stored in this form until used, when the package is opened and the product returns to its original shape and porosity. The method is characterized in that the friction between the fibers in the product is reduced, that the product is possibly frozen for a short time, that it is packed in an airtight container with low water vapor permeability, then the porosity of the product is reduced by up to one third and the air in the package is removed. after which the package is sealed airtight and moisture-tight, and that the product, after opening the package, may be treated mechanically, such as by vibration or shaking, to achieve a faster recovery.

According to the main patent, it has then proved suitable to reduce friction by adding a friction-reducing agent or product by drying or combining the two methods. In this case, silicone oil is preferably used as a friction-reducing agent. Due to the small amount of substance to be added, it is then most appropriate and almost necessary to use a solvent.

However, this solvent has been shown to cause environmental damage due to odor and toxic effects, both when the substance is added and when the package is opened, unless the solvent can be completely removed before the product is packaged.

It is an object of the present invention to obviate these drawbacks of the above method.

According to the present invention, it has now surprisingly been found that friction reducing agents other than silicone oils can be used and that the added substance does not necessarily have to be in flowable form, nor does it need to be added dissolved in a solvent.

Thus, according to the invention, both fluids and solids can be used as friction-reducing agents. These may be added as such, preferably in finely divided form, or dissolved, emulsified or suspended in a solvent, a partial solvent or a friction reducing agent non-reliant agent.

In this case, it has been particularly surprising that a friction-reducing agent emulsified in water, such as silicone oil, can also be used. Adding an aqueous emulsion is then particularly suitable in terms of environmental protection and cost.

Furthermore, according to the present invention, it has been found that the treatment with the friction-reducing agent does not have to be performed after the product has been impregnated, but that it can also be performed during the manufacture of the product. Thus, a friction reducing agent can be added directly to the fibers during their manufacture, together with the binder, or directly after the addition of the binder. In addition, the addition can be performed before or after carding the fibers into sheets or tracks. The addition can then be carried out by spraying on loose fibers or by spraying, coating or impregnating the fibers when they have been collected on a conveyor belt or when they have been carded into sheets or tracks.

When the substance is added during carding, its distribution in the product can be promoted by using a vacuum, such as suction boxes, below the perforated conveyor belt. Also, heating during subsequent curing of the adhesive can lead to a decrease in the viscosity of the friction reducing agent and thus contribute to its spread in the product. In addition, solvents, emulsifiers or suspending agents can be removed during this curing.

The friction reducing agent can also be added when the product is already completely ready, either by spraying, coating or impregnation. In this case, the even distribution of the substance in the product can be carried out or it can be improved by means of the vacuum used in connection with the packaging.

Also, when a friction reducing agent is added during the manufacture of the product, the penetration of the agent may remain at the packaging stage or be complete only at that stage. Thus, it is not necessary to use a vacuum before curing, although this embodiment is very suitable.

There are certain requirements for a friction reducing agent. Thus, it must be chemically inert, non-corrosive, thermally stable and oxidatively stable. Its viscosity must be low over a wide temperature range, it must not be self-igniting and its flash point must be high. The surface tension must be low and the compressibility and shear stability must be high.

For example, the following types of compounds are possible as friction reducing agents, provided that their properties are suitable: paraffin oils, liquid and solid fatty acids, solid hydrocarbons and alcohols, graphite, molybdenum sulfide, silicones, silicone derivatives such as fluorosilicones, and fluorocarbons® such as . Examples of silicones include phenylmethylpolysiloxane and dimethylsiloxane, as well as various products from Dow Corning and ICI, such as M400 (oil in water emulsion with a viscosity of 200 cSt and a silicone content of 35%) and Fill (polydimethylsiloxane). , 100%, ten different viscosities) manufactured by ICI.

Examples of solvents, especially for silicones, include benzene, toluene, and lacquer naphtha. Partial solvents include cyclohexane, and non-solvents include alcohols and water.

The invention will be explained in more detail below with reference to the accompanying drawing, in which Fig. 1 schematically shows the manufacture of glass wool, Fig. 2 a curve showing the relationship between pressure and compression and Fig. 3 an overpressure / return curve with different loads.

In the production of glass wool, the glass raw material is transported from the tank 1 (Fig. 1) to the melting tank 2. The melt is then injected through the screen-like nozzles 3 into fine fibers. These are immediately sprayed with water to lower the temperature, after which the binder and other additives are sprayed on them at step 4. The fibers fall onto the conveyor belt 5 and are carded into sheets or tracks before being fed to the curing oven 6. The finished products 7 are taken from the oven.

The addition of the friction reducing agent can be carried out together with or immediately after the binder in step 4. Since the fibers are separated at this stage and the substance can easily penetrate the whole material, large amounts of material do not have to be used and therefore a fluid or powdered solid can be used without additive or solvent. Emulsions, solutions or suspensions may also be used at this stage.

The addition can then take place after the fibers have fallen onto the conveyor belt 5, before, during or after carding. In this case, supplementation with a solvent or non-solvent is recommended, although not necessary. The friction reducing agent can be added as a coating layer on the pulp and is absorbed into the pulp by means of a vacuum arranged under the conveyor belt or by applying the vacuum later in the next packaging step. The addition can then also be carried out by spraying or impregnating with a solid or liquid. In this case, too, the absorption can be enhanced by using a vacuum.

When the addition is performed during these two steps before curing, the removal of any solvent or other excipient can be promoted by using an elevated temperature in the curing oven. A vacuum can also be provided in the furnace to remove vapors.

When the friction reducing agent is added before curing, it is essential that the flash point of the agent, as well as any solvent, emulsifier or suspending agent, is higher than the temperature used in the curing oven and higher than the temperature of the fibers during the addition itself.

The treatment can also be carried out on the finished products 7. In order for the penetration to be good, a solvent or other additive is then almost necessary. To remove this, the sheets can be dried or a vacuum can be used during the packaging phase.

Compression of glass wool.

The tests have been performed by compressing glass wool sheets (Gullfiber AB) at different pressures. In this case, it turned out that silicone-treated sheets and silicone-treated and dried sheets could be compressed more than untreated sheets at the same pressure. Thus, according to the present invention, not only better recovery after compression storage is achieved, but also that the compression step itself can be performed at a lower pressure and thus using less mechanical energy.

Glass wool compression recovery.

Glass wool sheets (Gullfiber AB) were compressed by gradually increasing the peeling up to 6 kPa. Thereafter, the load was gradually reduced. Figure 3 shows both an increased degree of compression under the same load and an improved recovery. Stress relaxation.

Untreated and silicone-treated glass wool sheets were compressed with an INSTRON to a compression ratio of 5: 1. Stress relaxation was then measured, 2 resp. After 16 hours of continuous compression. The results in the following table show that the stress losses are lower with silicone treated than with untreated specimens. This suggests that recovery is better in the silicone-treated material than in the untreated material.

6 63364

Relative stress ° 2 / ° 16 / _a0 _ ^ _ Untreated 64 59

Silicone treated 68 64

Oq = stress at a compression ratio of 5: 1 = stress after 2 hours of compression = stress after 16 hours of compression

Compression of different grades of glass wool.

The following table shows the compression and recovery of two glass wool grades of different weights. The glass wool sheets were manufactured by Gullfiber AB.

The untreated plates were compressed in a 5: 1 ratio and recovery was measured. Thereafter, the same compression pressure was applied, with a higher degree of compression as shown in the above example, and the recovery was examined.

Product: Glass wool (Gullfiber AB)

Compression- Silicone- Thickness in mm after different recovery blue deposits degree of pain%. .ΛΛ _ product Measuring pressure 100 Pa 60 Pa 30 Pa by weight__ (solvent) 0 4h 2 Oh 45h 95h 95h 95h 5: 1 quality: 0 88 93 94 95 97 102 103 17 ° kg / m3 0.5 89 94 95 97 98 103 106 1.0 89 94 95 97 98 103 106 5: 1 quality: 0 83 88 90 94 94 99 103 3029 22 kg / ra3 0.5 89 92 94 96 97 103 107 1.0 96 100 102 104 105 109 111

Thus, as can be seen from the tables above, a better recovery was achieved for the treated sheets despite the higher degree of compression.

The above experiments were performed using silicone as a friction reducing agent in a solvent. The experiments were then repeated on 7,636,364 using a silicone oil-water emulsion as a friction reducing agent. This resulted in equally good results.

Vacuum packaging for mineral wafers

The results below were obtained with a compression ratio of 4: 1 and storage of mineral wool sheets (Rockwool) for 14 days.

Thickness in mm

The test piece is immediately after the opening of the 24-hour return after the opening of the 48-hour return .......

untreated 60 65 75 treated and dried 75 78 80 silicone-treated 75 90 90 silicone-treated and dried at 70 ° C for 2 hours 80 87 90

As can be seen from the table, in this case, too, substantially better results were obtained with the method according to the invention than with compression and recovery without any treatment.

The experiments were also performed by compressing mineral wool sheets (Rockwool), the sheets being partially untreated and partially treated with a 40% silicone solution in varnolene and a partial 35% silicone emulsion in water. In this case, substantially better recovery results were obtained for the treated plates, and the results of the treatment with the silicone solution and the treatment with the silicone emulsion were comparable.

Claims (11)

8 63364 A method for pre-treating, packaging and post-treating a sound and heat insulating product consisting of inorganic fibers and an adhesive, which product is compressed and packaged under vacuum in an airtight material so as to be sealed in an airtight container having a low water vapor permeability. the porosity is reduced by no more than one third of the original porosity and the air in both the package and the product is removed and the package is sealed airtight and moisture-proof and the product is stored until use, opening and returning the product to its original shape and porosity, reducing fiber friction before packaging moisture content and / or by adding a friction-reducing agent, and that it may be frozen for a short time at a temperature below the freezing point of the adhesive in the product. below, characterized in that the friction-reducing agent is a silicone or a silicone derivative such as fluorosilicone, dimethylsiloxane or phenylmethylpolysiloxane, a fluorocarbon, preferably polytetrafluoroethylene, or an inorganic compound such as molybdenum sulfide. Method according to Claim 1, characterized in that the friction-reducing agent is added by impregnation, spraying or coating the product. A method according to claim 1, characterized in that the friction reducing agent is added to the fibers during the manufacture of the product by impregnation, spraying or coating. Process according to one of Claims 1 to 3, characterized in that the friction-reducing agent is added dissolved, suspended or emulsified in a solvent, a partial solvent or a non-solvent. Process according to Claim 4, characterized in that the substance is added as an aqueous emulsion. 9 63364 Process according to Claim 5, characterized in that the substance is an aqueous emulsion of silicone oil. Method according to Claim 3, characterized in that the addition is carried out after the addition of the adhesive and other additives or in connection with the carding of the fibers into sheets or tracks before the adhesive has hardened. A method according to claim 3, characterized in that the penetration of the friction reducing agent into the product is promoted by using a vacuum during carding. Method according to Claim 2 or 7, characterized in that the penetration of the friction-reducing agent into the product is promoted by applying a vacuum after the adhesive has hardened, preferably during packaging of the product. 1. Fertilizers for the manufacture, packaging and effluent treatment of organic and organic products in which the products are compressed and packaged under the ground and in the same material as the materials and means of the air supply packaging, varterter products in porous wood with a maximum of 1/3 of the porosity and porosity of the product and of the product in the form of airbags, of the packing of the product and of the color of the product in the form of in the case of packaging products and products from the outside in the form and porosity of the product, the friction of the fibrils and the products of mining for the packaging of the genome is reduced by the action of under the system conditions for the products, känneteck-n at därav, the detergents of silicone derivatives or silicone derivatives, fluorosilicone,