EP4343044A1 - Method for manufacturing insulating parts, and insulating part thus obtained - Google Patents

Method for manufacturing insulating parts, and insulating part thus obtained Download PDF

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Publication number
EP4343044A1
EP4343044A1 EP22791170.8A EP22791170A EP4343044A1 EP 4343044 A1 EP4343044 A1 EP 4343044A1 EP 22791170 A EP22791170 A EP 22791170A EP 4343044 A1 EP4343044 A1 EP 4343044A1
Authority
EP
European Patent Office
Prior art keywords
fibers
felt
weight
mixture
bico
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.)
Pending
Application number
EP22791170.8A
Other languages
German (de)
French (fr)
Inventor
Pedro Moreno Garcia
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Plus Felt SL
Original Assignee
Plus Felt SL
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Plus Felt SL filed Critical Plus Felt SL
Publication of EP4343044A1 publication Critical patent/EP4343044A1/en
Pending legal-status Critical Current

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Classifications

    • 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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/04—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres having existing or potential cohesive properties, e.g. natural fibres, prestretched or fibrillated artificial fibres
    • D04H1/26—Wood pulp
    • 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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • 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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/425—Cellulose series
    • 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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4274—Rags; Fabric scraps
    • 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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • 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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
    • 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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/542—Adhesive fibres
    • D04H1/551—Resins thereof not provided for in groups D04H1/544 - D04H1/55
    • 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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/558—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving in combination with mechanical or physical treatments other than embossing

Definitions

  • the present invention relates to a process for manufacturing insulating parts, applicable as thermal and acoustic insulation, mainly in the automobile industry, in household appliances such as washing machines, refrigerators, microwaves and dishwashers, and in other machines that require soundproofing, such as compressor motors or the like. These insulating pieces are also applicable in the agricultural sector in order to protect small trees from frost.
  • insulation products are mostly based on mineral wool.
  • Products based on glass or rock fiber are widely used, in particular those whose fibers are in the form of mineral wool, which have thermal and/or acoustic insulation properties.
  • These insulation products are manufactured from mineral fibers obtained by different procedures, for example, according to the well-known technique of fiber formation by internal or external centrifugation.
  • the internal centrifugation technique consists in particular in introducing the molten material (generally glass or a rock) into a centrifugal device comprising a multitude of small holes, the material being projected towards the peripheral wall of the device under the action of centrifugal force and escaping in the form of filaments.
  • molten material generally glass or a rock
  • the filaments are stretched and dragged by a gas flow having a high temperature and speed, towards a receiving element in order to form a layer of fibers.
  • a sizing composition containing a thermosetting resin, most often a phenolic resin is sprayed onto the fibers at the outlet of the centrifugal device.
  • the coated fiber layer of the sizing composition is submitted to a heat treatment in order to carry out the polycondensation of the resin and to obtain a thermal and/or acoustic insulation product with specific properties, in particular dimensional stability, resistance to traction, thickness recovery after compression and a homogeneous color.
  • the insulation product In certain applications where the insulation product is exposed to high temperatures (household appliances, heating ducts) or must meet strict standards (ships, public buildings, particularly in relation to roofs), it is essential that the product also has an optimal resistance to fire.
  • the solution used consists of adding a fire retardant agent to the gluing composition.
  • Said agent may be a phosphorous compound, a halogenated compound, a nitrogenous compound, a metal hydroxide, a carboxylic acid metal salt or a boron-containing compound.
  • the applicant for the invention is unaware of the existence of thermally and acoustically insulating pieces that are obtained by the method of this invention, that incorporate a high percentage of recycled materials and that also provide an optimal resistance to flames.
  • the manufacturing process of the present invention has technical features aimed at achieving the objectives mentioned above.
  • the manufacturing process of soundproofing insulating pieces comprises:
  • recycled textile fibers may come from garments with a flame resistance treatment, for example, from garments used by firefighters, in foundries, or in any other task in which operators work in areas exposed to high temperatures.
  • the process of the invention allows these textile fibers to be reused which, as they have a flame-resistance treatment, are difficult to destroy when they are discarded together with other waste that does not have any special treatment.
  • the bicomponent staple fibers of polyester known as Bico fibers, have a sheath and a core with a low melting point, which contributes to the bonding of the different fibers during the baking of the felt, and the subsequent molding of insulating pieces in hot steel molds.
  • the wood fibers incorporated in the felt contribute to providing resistance and insulation, both thermal and acoustic, to the insulating pieces formed with said felt.
  • the fibers to be mixed preferably include percentages by weight between:
  • the amount of resin added to the fiber mixture is between 20% and 30% of the total weight of said fiber mixture.
  • the molding of the felt plates to obtain insulating parts can be done cold or hot, introducing them into a hot steel mold at a temperature between 180 and 200 degrees Celsius in the latter case.
  • This invention also includes an insulating part; in particular of thermal and acoustic insulation, obtained with the procedure described above.
  • Said insulating piece is made up of a thermosetting felt, hot-moulded, comprising a mixture of: bicomponent polyester staple fibers, with a low melting point (Bico fibers); - wood fibers, - recycled textile fibers from garments or fabrics with a flame-resistance treatment, and phenolic or thermoplastic resin.
  • the percentages by weight of the fibers are between: 5% - 15% of low melting point bicomponent polyester staple fibers (Bico fibers); 40% - 50% wood fibers, and 35% - 45% recycled textile fibers; the weight of phenolic or thermoplastic resin being between 20% and 30% of the total weight of the fiber mixture.
  • this combination of percentages provides the insulating piece with optimal acoustic and thermal insulation properties for its application in the aforementioned sectors, and additionally provides other suitable properties for its use in said sectors, specifically a density between 700 and 1000 kg/m3; greater rigidity than other pieces with the same percentage of resin and weight; no mold growth after 150 hours at 38°C and 95% relative humidity, or a flammability test of less than 100 mm/min.
  • the insulating piece comprises the following percentages by weight of the fibers: 10% bicomponent polyester staple fibers, low melting point (Bico) fibers; 45% wood fibers and 40% recycled textile fibers; the weight of phenolic or thermoplastic resin included therein being 25% with respect to the total weight of the fiber mixture.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Inorganic Insulating Materials (AREA)
  • Insulating Bodies (AREA)

Abstract

The present invention relates to a method for manufacturing insulating parts, in particular thermal and acoustic insulation parts; the method comprising the mixing of: bicomponent polyester staple fibres with a low melting point (Bico fibres), wood fibres, and recycled textile fibres from garments or fabrics with a flame-resistant treatment; - the opening of said fibres; the addition of phenolic resin fibres or thermoplastic fibres to the mixture, - the precuring of the felt by heating thereof in a furnace, - the cutting into sheets or the rolling into coils of the precured felt and the shaping of insulating parts by moulding the precured felt. The invention further comprises the insulating part thus obtained.

Description

    Technical sector
  • The present invention relates to a process for manufacturing insulating parts, applicable as thermal and acoustic insulation, mainly in the automobile industry, in household appliances such as washing machines, refrigerators, microwaves and dishwashers, and in other machines that require soundproofing, such as compressor motors or the like. These insulating pieces are also applicable in the agricultural sector in order to protect small trees from frost.
    • State of the Art
  • There are currently different materials on the market used as acoustic and thermal insulation in various sectors and mainly in the construction sector.
  • These insulation products are mostly based on mineral wool. Products based on glass or rock fiber are widely used, in particular those whose fibers are in the form of mineral wool, which have thermal and/or acoustic insulation properties.
  • These insulation products are manufactured from mineral fibers obtained by different procedures, for example, according to the well-known technique of fiber formation by internal or external centrifugation.
  • The internal centrifugation technique consists in particular in introducing the molten material (generally glass or a rock) into a centrifugal device comprising a multitude of small holes, the material being projected towards the peripheral wall of the device under the action of centrifugal force and escaping in the form of filaments.
  • At the outlet of the centrifugal device, the filaments are stretched and dragged by a gas flow having a high temperature and speed, towards a receiving element in order to form a layer of fibers. To ensure the assembly of the fibers among themselves and to allow the layer to have cohesion, a sizing composition containing a thermosetting resin, most often a phenolic resin, is sprayed onto the fibers at the outlet of the centrifugal device.
  • The coated fiber layer of the sizing composition is submitted to a heat treatment in order to carry out the polycondensation of the resin and to obtain a thermal and/or acoustic insulation product with specific properties, in particular dimensional stability, resistance to traction, thickness recovery after compression and a homogeneous color.
  • In certain applications where the insulation product is exposed to high temperatures (household appliances, heating ducts) or must meet strict standards (ships, public buildings, particularly in relation to roofs), it is essential that the product also has an optimal resistance to fire.
  • In these cases, the solution used consists of adding a fire retardant agent to the gluing composition. Said agent may be a phosphorous compound, a halogenated compound, a nitrogenous compound, a metal hydroxide, a carboxylic acid metal salt or a boron-containing compound.
  • The applicant for the invention is unaware of the existence of thermally and acoustically insulating pieces that are obtained by the method of this invention, that incorporate a high percentage of recycled materials and that also provide an optimal resistance to flames.
    • Explanation of the invention
  • The manufacturing process of the present invention has technical features aimed at achieving the objectives mentioned above.
  • To this aim, the manufacturing process of soundproofing insulating pieces, object of the present invention, comprises:
    • the provision of: low melting point bicomponent polyester staple fibers (Bico fibers); wood fibers, and recycled textile fibers with a flame resistance treatment; - the mixing and opening of said fibers
    • the addition to the mixture of phenolic or thermoplastic resin fibers
    • the introduction of the mixture of fibers and resin in a machine that re-positions and distributes the fibers throughout the width and length forming a homogeneous felt, with preselected parameters of weight and thickness per square meter,
    • the pre-curing of the felt and the welding of the fibers together, by heating them in an oven,
    • slicing or coiling of pre-cured felt;
    • finally, the conformation of insulating pieces by means of the molding, whether cold or hot, of the plates of pre-cured felt.
  • The addition of recycled textile fibers with a flame resistance treatment to the felt increases the flame resistance of the pieces made with said felt, without the need to use retardants of the type mentioned above.
  • It is envisaged that recycled textile fibers may come from garments with a flame resistance treatment, for example, from garments used by firefighters, in foundries, or in any other task in which operators work in areas exposed to high temperatures. In this case, the process of the invention allows these textile fibers to be reused which, as they have a flame-resistance treatment, are difficult to destroy when they are discarded together with other waste that does not have any special treatment.
  • The bicomponent staple fibers of polyester, known as Bico fibers, have a sheath and a core with a low melting point, which contributes to the bonding of the different fibers during the baking of the felt, and the subsequent molding of insulating pieces in hot steel molds.
  • The wood fibers incorporated in the felt contribute to providing resistance and insulation, both thermal and acoustic, to the insulating pieces formed with said felt.
  • According to the process of the invention, the fibers to be mixed preferably include percentages by weight between:
    • 5% -15% Bico fibers;
    • 40% - 50% wood fibers.
    • 35% - 45% recycled textile fibers with flame resistance treatment; the recycled textile fibers comprising at least 75%, and preferably around 80%, of cotton fibers with a flame resistance treatment, the remaining percentage being made up of fibers of various materials depending on the source fabric or garment of the same.
  • According to the process of the invention, the amount of resin added to the fiber mixture is between 20% and 30% of the total weight of said fiber mixture.
  • Depending on the type of resin used, the molding of the felt plates to obtain insulating parts can be done cold or hot, introducing them into a hot steel mold at a temperature between 180 and 200 degrees Celsius in the latter case.
  • This invention also includes an insulating part; in particular of thermal and acoustic insulation, obtained with the procedure described above.
  • Said insulating piece is made up of a thermosetting felt, hot-moulded, comprising a mixture of: bicomponent polyester staple fibers, with a low melting point (Bico fibers); - wood fibers, - recycled textile fibers from garments or fabrics with a flame-resistance treatment, and phenolic or thermoplastic resin.
  • In said insulating piece, the percentages by weight of the fibers are between: 5% - 15% of low melting point bicomponent polyester staple fibers (Bico fibers); 40% - 50% wood fibers, and 35% - 45% recycled textile fibers; the weight of phenolic or thermoplastic resin being between 20% and 30% of the total weight of the fiber mixture.
  • According to the tests carried out, this combination of percentages provides the insulating piece with optimal acoustic and thermal insulation properties for its application in the aforementioned sectors, and additionally provides other suitable properties for its use in said sectors, specifically a density between 700 and 1000 kg/m3; greater rigidity than other pieces with the same percentage of resin and weight; no mold growth after 150 hours at 38°C and 95% relative humidity, or a flammability test of less than 100 mm/min.
  • In a preferred embodiment of the invention, the insulating piece comprises the following percentages by weight of the fibers: 10% bicomponent polyester staple fibers, low melting point (Bico) fibers; 45% wood fibers and 40% recycled textile fibers; the weight of phenolic or thermoplastic resin included therein being 25% with respect to the total weight of the fiber mixture.
  • Once the nature of the invention has been sufficiently described, as well as a preferred embodiment, it is stated for the appropriate purposes that the materials, shape, size and arrangement of the elements described may be modified, as long as this does not imply an alteration of the essential characteristics of the invention that are claimed below.

Claims (7)

  1. Manufacturing procedure of insulating parts; in particular thermal and acoustic insulation, characterized in that it comprises:
    - the provision of: low melting point bicomponent polyester staple fibers (Bico fibers); wood fibers, and recycled textile fibers with a flame resistance treatment;
    - the mixing and opening of said fibers
    - the addition to the mixture of phenolic or thermoplastic resin fibers
    - the introduction of the mixture of fibers and resin in a machine that repositions and distributes the fibers throughout the width and length forming a homogeneous felt, with preselected parameters of weight and thickness per square meter,
    - the pre-curing of the felt and the welding of the fibers together, by heating them in an oven,
    - slicing or coiling of pre-cured felt;
    - finally the conformation of insulating pieces by means of the molding, cold or hot, of the pre-cured felt plates.
  2. Method, according to claim 1, characterized in that the mixture of the percentages by weight of fibers is between:
    - 5% -15% Bico fibers;
    - 40% - 50% wood fibers.
    - 35% - 45% recycled textile fibers.
  3. Procedure, according to any of the preceding claims; characterized in that the recycled textile fibers comprise at least 75% and preferably around 80% of cotton fibers with a flame resistance treatment.
  4. Procedure, according to any of the previous claims; characterized in that the amount of resin added to the fiber mixture is between 20% and 30% of the total weight of the fiber mixture.
  5. Insulating piece; in particular for thermal and acoustic insulation, characterized in that it is made up of a hot-molded thermosetting felt, comprising a mixture of:
    - low melting point bicomponent polyester staple fibers (Bico fibers); - wood fibers, - recycled textile fibers from garments or fabrics with a flame-resistance treatment, and - phenolic or thermoplastic resin.
  6. Insulating piece, according to claim 5, characterized in that the percentages by weight of the fibers are between: 5% -15% of low melting point bicomponent polyester staple fibers (Bico fibers); 40% - 50% wood fibers and 35% - 45% recycled textile fibers; the weight of phenolic or thermoplastic resin being between 20% and 30% of the total weight of the fiber mixture.
  7. Insulating piece, according to claim 6, characterized in that the percentages by weight of the fibers are: 10% bicomponent polyester staple fibers with a low melting point (Bico fibers); 45% wood fibers and 40% recycled textile fibers; and the weight of phenolic or thermoplastic resin is 25% total weight of the fiber mixture.
EP22791170.8A 2021-04-21 2022-03-30 Method for manufacturing insulating parts, and insulating part thus obtained Pending EP4343044A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES202130354A ES2926753B2 (en) 2021-04-21 2021-04-21 PROCEDURE FOR MANUFACTURING INSULATING PARTS, AND OBTAINED INSULATING PART
PCT/ES2022/070184 WO2022223859A1 (en) 2021-04-21 2022-03-30 Method for manufacturing insulating parts, and insulating part thus obtained

Publications (1)

Publication Number Publication Date
EP4343044A1 true EP4343044A1 (en) 2024-03-27

Family

ID=83722725

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22791170.8A Pending EP4343044A1 (en) 2021-04-21 2022-03-30 Method for manufacturing insulating parts, and insulating part thus obtained

Country Status (3)

Country Link
EP (1) EP4343044A1 (en)
ES (1) ES2926753B2 (en)
WO (1) WO2022223859A1 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL1678385T3 (en) * 2003-10-30 2013-12-31 3M Innovative Properties Co A cellulose fibre based insulation material
WO2011057641A1 (en) * 2009-11-13 2011-05-19 Formfiber Denmark Aps A non-woven fibre product comprising fibres of recycled material

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Publication number Publication date
WO2022223859A1 (en) 2022-10-27
ES2926753B2 (en) 2023-03-10
ES2926753A1 (en) 2022-10-27

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