US20030116307A1 - Insulating preform - Google Patents
Insulating preform Download PDFInfo
- Publication number
- US20030116307A1 US20030116307A1 US10/258,996 US25899602A US2003116307A1 US 20030116307 A1 US20030116307 A1 US 20030116307A1 US 25899602 A US25899602 A US 25899602A US 2003116307 A1 US2003116307 A1 US 2003116307A1
- Authority
- US
- United States
- Prior art keywords
- glass
- preform
- wool
- support
- net
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000003365 glass fiber Substances 0.000 claims abstract description 26
- 239000011491 glass wool Substances 0.000 claims abstract description 21
- 239000011521 glass Substances 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000000126 substance Substances 0.000 claims abstract description 8
- 210000002268 wool Anatomy 0.000 claims abstract description 8
- 239000003292 glue Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 12
- 229920002472 Starch Polymers 0.000 claims description 4
- 239000008107 starch Substances 0.000 claims description 4
- 235000019698 starch Nutrition 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims description 2
- 239000011152 fibreglass Substances 0.000 claims description 2
- 230000000295 complement effect Effects 0.000 claims 1
- 238000009413 insulation Methods 0.000 description 7
- 239000003570 air Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 244000144992 flock Species 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011490 mineral wool Substances 0.000 description 2
- 229920001568 phenolic resin Polymers 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 230000002110 toxicologic effect Effects 0.000 description 1
- 231100000027 toxicology Toxicity 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/24—Silencing apparatus characterised by method of silencing by using sound-absorbing materials
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/002—Inorganic yarns or filaments
- D04H3/004—Glass yarns or filaments
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/018—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the shape
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
- D04H3/07—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments otherwise than in a plane, e.g. in a tubular way
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/14—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
- E04B1/7654—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only comprising an insulating layer, disposed between two longitudinal supporting elements, e.g. to insulate ceilings
- E04B1/7658—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only comprising an insulating layer, disposed between two longitudinal supporting elements, e.g. to insulate ceilings comprising fiber insulation, e.g. as panels or loose filled fibres
- E04B1/7662—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only comprising an insulating layer, disposed between two longitudinal supporting elements, e.g. to insulate ceilings comprising fiber insulation, e.g. as panels or loose filled fibres comprising fiber blankets or batts
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
- E04B1/78—Heat insulating elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2310/00—Selection of sound absorbing or insulating material
- F01N2310/02—Mineral wool, e.g. glass wool, rock wool, asbestos or the like
Definitions
- the present invention relates to thermal and acoustic insulation obtained by means of continuous glass fiber.
- continuous glass fiber can be used without any decay in a temperature range of 950° C. to 1150° C.; a “softening” phase begins only at about 1300° C. and continues until 1520 ° C.: after having reached this temperature, the glass begins to melt.
- this material can be used in fields in which medium-low working temperatures are reached as e.g. electrical appliances (stoves, refrigerators or generally motor powered devices), boilers, mufflers for internal combustion engines, etc.
- the body to be insulated is wrapped with a surrounding preform with thermal and sound insulating properties.
- the preform is obtained by two processes:
- a molded insulation product is known produced by means of a process for forming a thermal insulation layer which include advancing a multi-filament strand of continuous filaments through a nozzle, to separate the filaments from each other to form a continuous filament wool, applying a binder to the filaments, placing a charge comprising the wool in a mold and molding the charge to form the insulation layer.
- the charge comprises a container formed from a polymer film.
- EP-A-531767 it is known a device for adsorption of acoustic and/or hydrodynamic waves, in which a conical, wedge-shaped or pyramidal external circumferential surface, which is constructed as a network, knitted or knotted from a weatherproof material such as rubber or glass fibre, is filled with a fibrous material.
- the external surface takes the form of a wedge or a pyramid to provide an acoustic dampening effect.
- the object of the present invention is to propose a heat and sound insulating preform, which can have different conformation in relation to its use.
- Another object of the present invention is to propose a preform, which is not harmful to people.
- a further object of the present invention is to propose a preform obtained by using only one component, i.e. glass.
- an insulating preform formed by a mass of glass fiber resembling wool, or glass wool, obtained by extreme bulking of glass fiber, that means increasing the volume of the glass fiber as much as possible, and a support for the glass wool, including a net, also of glass wool, and defined by a non-bulked thread of glass, said glass wool and the net being kept together, so as to compose geometrical figures without using glues and/or impregnating substances.
- the glass fiber is covered with a silane starch to allow its workability as well as for shipment and storage needs.
- a tool obtained by the Applicant using the air-cushion generated by a suitable ejecting nozzle, manages to “inflate” the strand of glass fiber, thus forming a mass of glass fiber resembling wool with highly insulating properties.
- the so obtained glass wool is formed by innumerous continuous threads, having their own elasticity. These continuous threads do not release particles in the air and do not have any “needle” effect while being touched.
- a vibrating wall is dampened by a more or less thick flock with any possible shape; handling a glass fiber flock does not require for the operator any safety care by means of particular anti-pollution devices.
- the glass thread is continuous and therefore does not have any needle-like part.
- the thickness of the glass thread is 25 ⁇ M, does not spread in the ambient air and therefore is not inhaled, does not produce chemical vapors or exhalation of any type.
- the melting temperature of the glass fiber is about 1,200° C., therefore it can be easily used at temperatures below this value thus allowing a large number of applications.
- Blowing in the glass wool through a glass net makes it possible to obtain any desired density and, at the same time, to create a false wall defined by that part of glass net which does not match any real wall. This false wall keeps the otherwise free-flowing material.
- the net can be stiffened with a selected substance, starch for instance, at least in the external part forming the false wall.
- the net can be compacted until it becomes like a woven material.
- a layer of material preferably metallic such as aluminum, is applied at least to the surface of the shell which does not match with any wall, so as to avoid any air passage from inside the shell to outside, and vice versa. In this way, a shield is obtained which keeps the air within the preform.
- an insulating product which, not only does not release hazardous particles, but it also does not release anything even after some time (the product includes continuous threads) thus obtaining a longer life of the silencer devices.
- the preform proposed includes glass wool and a net, made of the same material as the glass wool, which are held together to form geometrical shapes without the use of any glue and/or impregnating substances.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Textile Engineering (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Electromagnetism (AREA)
- Acoustics & Sound (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Insulation (AREA)
- Nonwoven Fabrics (AREA)
Abstract
An insulating preform made of a mass of glass fiber resembling wool obtained by extreme bulking of glass fiber and by a support for the glass wool, the support including a net being of the same material of the glass wool and defined by a non bulked glass strand. The glass wool and the net are held together so as to make geometrical shapes without any glue and/or impregnating substance.
Description
- The present invention relates to thermal and acoustic insulation obtained by means of continuous glass fiber.
- It is known that continuous glass fiber can be used without any decay in a temperature range of 950° C. to 1150° C.; a “softening” phase begins only at about 1300° C. and continues until1520° C.: after having reached this temperature, the glass begins to melt.
- Thus, this material can be used in fields in which medium-low working temperatures are reached as e.g. electrical appliances (stoves, refrigerators or generally motor powered devices), boilers, mufflers for internal combustion engines, etc.
- According to a known system for thermal insulation of a hot body (so as to prevent it from dispersing heat) or for keeping a body cold, or for sound insulation between adjacent walls, the body to be insulated is wrapped with a surrounding preform with thermal and sound insulating properties.
- The preform is obtained by two processes:
- according to a first process, countless filaments forming the glass fiber are oriented; then they are soaked with phenol starch, so as to maintain the desired volume (i.e. maintain the capability for keeping air, which is the actual thermal insulator) and density, and finally they are glued onto a paper or aluminium support (according to the intended use), so as to allow them to be handled and applied;
- according to a second process, basaltic rock is melted to obtain many filaments. The so obtained filaments are excessively fragile and do not keep their own volume, so they are impregnated with phenolic resins to obtain either preformed blocks, which matches the cavities and fill them thus giving them insulating properties, or mats of various thickness and density, which are placed in a desired position.
- The methods used so far do not allow to obtain filaments of exact and selected diameter neither from the glass wool nor from rock wool, actually filaments of 10, 6 and also 2 μm are obtained.
- These filaments are not continuous, but they can break forming separated filaments resembling needles.
- It is to be pointed out that EEC regulations have put these articles into the class II, because they can leave particles smaller than 2 μm, which are breathable, irritating and consequently cancerogenous.
- Another disadvantage of the above methods results from the necessity to use phenolic resins for making the articles suitable for handling; the resins not only emit exhalations, which are sometimes toxic, but also increase the production costs, since they require annealing of the treated article.
- From the publication WO-A-98/24615 a molded insulation product is known produced by means of a process for forming a thermal insulation layer which include advancing a multi-filament strand of continuous filaments through a nozzle, to separate the filaments from each other to form a continuous filament wool, applying a binder to the filaments, placing a charge comprising the wool in a mold and molding the charge to form the insulation layer. In a preferred embodiment, the charge comprises a container formed from a polymer film.
- From another publication, EP-A-531767 it is known a device for adsorption of acoustic and/or hydrodynamic waves, in which a conical, wedge-shaped or pyramidal external circumferential surface, which is constructed as a network, knitted or knotted from a weatherproof material such as rubber or glass fibre, is filled with a fibrous material. The external surface takes the form of a wedge or a pyramid to provide an acoustic dampening effect.
- The object of the present invention is to propose a heat and sound insulating preform, which can have different conformation in relation to its use.
- Another object of the present invention is to propose a preform, which is not harmful to people.
- A further object of the present invention is to propose a preform obtained by using only one component, i.e. glass.
- The above objects are obtained, in accordance with the contents of the claims, by an insulating preform formed by a mass of glass fiber resembling wool, or glass wool, obtained by extreme bulking of glass fiber, that means increasing the volume of the glass fiber as much as possible, and a support for the glass wool, including a net, also of glass wool, and defined by a non-bulked thread of glass, said glass wool and the net being kept together, so as to compose geometrical figures without using glues and/or impregnating substances.
- The characteristic particular to the invention are set forth in the following description of two preferred embodiments of the proposed shell
- The used glass fiber is formed by various filaments having diameter in the range of 6 to 25 μm (in relation to the product used), put together to form one strand having weight in the range of 136 to 4800 Tex (grams×Km=Tex).
- During the productive process, the glass fiber is covered with a silane starch to allow its workability as well as for shipment and storage needs.
- A tool, obtained by the Applicant using the air-cushion generated by a suitable ejecting nozzle, manages to “inflate” the strand of glass fiber, thus forming a mass of glass fiber resembling wool with highly insulating properties.
- It is to be pointed out that the so obtained glass wool is formed by innumerous continuous threads, having their own elasticity. These continuous threads do not release particles in the air and do not have any “needle” effect while being touched.
- More precisely, more than 5000 continuous threads of diameter equal to 25 μm forming the strand, are separated. The separation is not regular, i.e. it does not form paired parallel threads but the threads are disposed in a curvilinear or straight way, so that they intersect each other producing maximum volume. Each thread keeps it own elasticity (though reduced because it is proportional to the cross-sectional area) thus giving the flock a particular softness because of the repeated elastic reaction movement following a compression exerted by any mechanical action thereon (either caused by a human hand or by the metallic structure of a machine).
- Consequently, an extreme bulking of the continuos fiber glass, is obtained, that means that the volume of the glass fiber is increased as much as possible.
- Excellent from the acoustic point of view, a vibrating wall is dampened by a more or less thick flock with any possible shape; handling a glass fiber flock does not require for the operator any safety care by means of particular anti-pollution devices.
- The glass thread is continuous and therefore does not have any needle-like part. The thickness of the glass thread is 25 μM, does not spread in the ambient air and therefore is not inhaled, does not produce chemical vapors or exhalation of any type.
- This softness property obtained with am homogeneous capillary fabric performs the task of keeping air within small spaces and prevents the underlying surface from scattering heat (in other words it prevents temperature drops and the necessity to spend energy to re-integrate it).
- The melting temperature of the glass fiber is about 1,200° C., therefore it can be easily used at temperatures below this value thus allowing a large number of applications.
- In order to give a support to the insulating glass wool, a net has been made from non-bulked glass strand to form a kind of container or false wall. In this way it is possible to form mats with the desired dimension using only glass.
- Advantageously, some applications in the field of exhaust pipe mufflers production for motorcars would not allow to insert the insulating glass wool in accordance with the density requirements, since not all the insulating walls are available.
- Actually, while producing compression molded mufflers, the operator necessarily has to gain access therein by keeping one of the shells raised. Any material introduced therein which has not been previously given a stable shape will tend to come out of the seat where it was placed.
- Blowing in the glass wool through a glass net makes it possible to obtain any desired density and, at the same time, to create a false wall defined by that part of glass net which does not match any real wall. This false wall keeps the otherwise free-flowing material.
- Consequently, the above mentioned net takes a selected spatial arrangement.
- In case this arrangement is too complex, the net can be stiffened with a selected substance, starch for instance, at least in the external part forming the false wall.
- The net can be compacted until it becomes like a woven material.
- To optimize the insulating property of the proposed preform, a layer of material, preferably metallic such as aluminum, is applied at least to the surface of the shell which does not match with any wall, so as to avoid any air passage from inside the shell to outside, and vice versa. In this way, a shield is obtained which keeps the air within the preform.
- In all those cases in which a glass wool preform was used, from now on the following will be used instead:
- a preform which has not any needle-like parts, so that operators will not have to face any risk;
- a preform which does not release any part smaller than 3 μm; an environment in which health is not endangered is thus obtained and the device provided with this new kind of filled insulation do not present any problem deriving from spreading particles in the ambient;
- a preform is obtained which is not impregnated with chemical additives, which does not cause exhalations inside heated environments, with possible problems connected with the toxicologic characteristics of the product.
- As far as other applications in which pre-molded blocks of rock wool are to be used, the advantages deriving from the presence of false walls and bulked glass are as follows:
- recesses filled with glass only, no exhalations because of resins;
- no more storage expenses due to hundreds of different pre-formed blocks;
- an insulating product which, not only does not release hazardous particles, but it also does not release anything even after some time (the product includes continuous threads) thus obtaining a longer life of the silencer devices.
- As a final consideration, the preform proposed includes glass wool and a net, made of the same material as the glass wool, which are held together to form geometrical shapes without the use of any glue and/or impregnating substances.
- It should be understood that the above description is by way of unlimited example only, inasmuch as constructional and practical modifications remain decidedly within the scope of the protection afforded to the present invention as described above and as claimed below.
Claims (11)
1. A method for producing an insulating preform including a mass of mass of glass threads resembling wool, obtained by extreme bulking of glass fiber in form of increasing the volume of the glass fiber as much as possible, and a support for holding the glass wool, the method including the steps of:
inflating a strand of glass fiber by means of the air jet generated by a nozzle, thus forming a mass of glass fibers;
providing a support for the inflated glass fiber from non bulked strand of glass fibers, the support having a conformation corresponding to its use.
2. A method according to claim 1 , wherein the support taking a form a kinnd of container or a false wall complementary to a wall raised or removed of the component into which the preform is to be inserted.
3. A method according to claim 1 , wherein the support is obtained by blowing in the glass wool through a net made of fiber glass strands.
4. A method according to claim 2 , wherein the net is stiffened by means of a starch.
5. An insulating preform as obtained by the method of claims 1 to 4 , including a mass of mass of glass threads resembling wool, obtained by extreme bulking of glass fiber in form of increasing the volume of the glass fiber as much as possible, and a support for holding the glass wool, the support being formed by a net made of the same material as the glass wool and defined by a strand of non-bulked glass in the form of a strand of glass fiber, the glass threads resembling wool and the net being held together, due to elastic reaction of the bulked glass fiber, to form geometrical shapes without any help from glue and/or impregnating substances, these shapes corresponding to the use of the preform.
6. A preform as in claim 5 , characterized in that the net is compacted to define a cloth.
7. A preform as in claim 5 , characterized in that at least the part of the net that does not match any real wall is stiffened by means of a selected substance.
8. A preform as in claim 5 , characterized in that at least the part of the net that does not match any real wall is coated with a layer of material such as to prevent air passage from inside the preform to outside and vice-versa.
9. A preform as in claim 8 , characterized in that the layer of material is metallic.
10. A preform as in claim 5 , characterized in that the support has shape of a container that defines a seat for receiving said glass wool.
11. A preform as in claim 5 , characterized in that the support has a false wall co-operating with a real wall to define a seat for receiving said glass wool.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2000BO000265A IT1321250B1 (en) | 2000-05-09 | 2000-05-09 | INSULATING COAT |
PCT/IB2001/000766 WO2001094353A1 (en) | 2000-06-06 | 2001-05-02 | Thiophene derivatives useful as anticancer agents |
Publications (1)
Publication Number | Publication Date |
---|---|
US20030116307A1 true US20030116307A1 (en) | 2003-06-26 |
Family
ID=28043442
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/258,996 Abandoned US20030116307A1 (en) | 2000-05-09 | 2001-05-08 | Insulating preform |
Country Status (1)
Country | Link |
---|---|
US (1) | US20030116307A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019502834A (en) * | 2015-12-29 | 2019-01-31 | サン−ゴバン イゾベール | Insulation product with rose-filled mineral wool |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4411723A (en) * | 1979-10-03 | 1983-10-25 | Kurimoto Iron Works, Ltd. | Glass fiber-reinforced cement plates |
US4569471A (en) * | 1982-04-06 | 1986-02-11 | Ab Volvo | Container through which a gas flows, preferably a muffler, with fiberglass filling and method and apparatus for filling the same |
US4774985A (en) * | 1983-11-18 | 1988-10-04 | Tba Industrial Products Ltd. | Apparatus for filling automotive muffler with glass fibers |
US4874648A (en) * | 1988-03-17 | 1989-10-17 | Sorrento Engineer, Inc. | Method of making flame resistant polyimide foam insulation and the resulting insulation |
US4952366A (en) * | 1988-07-25 | 1990-08-28 | Owens-Corning Fiberglas Corporation | Molding process |
-
2001
- 2001-05-08 US US10/258,996 patent/US20030116307A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US4411723A (en) * | 1979-10-03 | 1983-10-25 | Kurimoto Iron Works, Ltd. | Glass fiber-reinforced cement plates |
US4569471A (en) * | 1982-04-06 | 1986-02-11 | Ab Volvo | Container through which a gas flows, preferably a muffler, with fiberglass filling and method and apparatus for filling the same |
US4774985A (en) * | 1983-11-18 | 1988-10-04 | Tba Industrial Products Ltd. | Apparatus for filling automotive muffler with glass fibers |
US4874648A (en) * | 1988-03-17 | 1989-10-17 | Sorrento Engineer, Inc. | Method of making flame resistant polyimide foam insulation and the resulting insulation |
US4952366A (en) * | 1988-07-25 | 1990-08-28 | Owens-Corning Fiberglas Corporation | Molding process |
Cited By (7)
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JP2019502834A (en) * | 2015-12-29 | 2019-01-31 | サン−ゴバン イゾベール | Insulation product with rose-filled mineral wool |
US11098423B2 (en) * | 2015-12-29 | 2021-08-24 | Saint-Gobain Isover | Insulating product comprising loose-fill mineral wool |
US20210355616A1 (en) * | 2015-12-29 | 2021-11-18 | Saint-Gobain Isover | Insulating product comprising loose-fill mineral wool |
JP2022008963A (en) * | 2015-12-29 | 2022-01-14 | サン-ゴバン イゾベール | Insulation product having loose fill mineral wool |
JP7011588B2 (en) | 2015-12-29 | 2022-01-26 | サン-ゴバン イゾベール | Insulation product with loosely packed mineral wool |
JP7351883B2 (en) | 2015-12-29 | 2023-09-27 | サン-ゴバン イゾベール | Insulating products with loosely packed mineral wool |
US11952688B2 (en) * | 2015-12-29 | 2024-04-09 | Saint-Gobain Isover | Insulating product comprising loose-fill mineral wool |
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