CH709109A2 - composite thermal and acoustical insulation material. - Google Patents
composite thermal and acoustical insulation material. Download PDFInfo
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- CH709109A2 CH709109A2 CH00031/14A CH312014A CH709109A2 CH 709109 A2 CH709109 A2 CH 709109A2 CH 00031/14 A CH00031/14 A CH 00031/14A CH 312014 A CH312014 A CH 312014A CH 709109 A2 CH709109 A2 CH 709109A2
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- 239000012774 insulation material Substances 0.000 title 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/24—Structural elements or technologies for improving thermal insulation
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Abstract
L’invention concerne un matériau composite isolant acoustiquement et thermiquement comprenant au moins une première couche appelée âme. L’âme est un nappé comprenant au moins des fibres de bois, des fibres végétales choisies parmi le groupe comprenant du coton, du chanvre et du jute et des agents de liage. Les pourcentages en masse, par rapport à la masse de l’âme, des fibres choisies dans ledit groupe et des fibres de bois, varient respectivement entre 20 et 75% et celui des agents de liage entre 5 et 30%.The invention relates to an acoustically and thermally insulating composite material comprising at least a first layer called core. The core is a batt comprising at least wood fibers, vegetable fibers selected from the group consisting of cotton, hemp and jute and binding agents. The percentages by weight, with respect to the mass of the core, of the fibers selected in said group and wood fibers vary respectively between 20 and 75% and that of the bonding agents between 5 and 30%.
Description
[0001] La présente invention concerne un matériau composite isolant acoustiquement et thermiquement. The present invention relates to an acoustically and thermally insulating composite material.
[0002] Dans la construction immobilière, automobile, aéronautique, ferroviaire et navale, on utilise depuis longtemps des isolants thermiques et acoustiques. Souvent ces isolants sont faits de laines minérales ou autres produits qui peuvent être nocifs lors de leur manipulation et/ou de leur utilisation ou lors de la destruction. La prise de conscience de ces inconvénients a poussé les constructeurs de se diriger vers l’utilisation des isolants d’origine naturelle. Néanmoins, si ces nouveaux isolants sont neutres du point de vue écologique ils ne donnent pas toujours satisfaction en termes de résistance à l’humidité, de résistance thermique et de longévité. On cherche sans cesse à fabriquer des isolants d’origine naturelle et plus particulièrement végétale répondant au mieux aux contraintes précitées. In the construction of real estate, automobile, aeronautic, railway and naval, thermal and acoustic insulators have been used for a long time. Often these insulators are made of mineral wool or other products that may be harmful during handling and / or use or during destruction. The realization of these disadvantages has pushed the builders to move towards the use of insulation of natural origin. Nevertheless, if these new insulators are ecologically neutral they do not always give satisfaction in terms of resistance to moisture, heat resistance and longevity. We are constantly seeking to manufacture insulators of natural origin and more particularly plant that best meets the aforementioned constraints.
[0003] Pour éviter toute interprétation erronée nous indiquons nos définitions de quelques termes techniques. To avoid any misinterpretation we indicate our definitions of some technical terms.
[0004] On appelle «fibre» une substance filamenteuse présentant une longueur (ou «taille») plus de 10 fois supérieure à sa plus grande dimension dans un plan transversal quelconque, les plans transversaux étant les plans coupant la fibre perpendiculairement à la direction de sa longueur. "Fiber" is a filamentary substance having a length (or "size") more than 10 times greater than its largest dimension in any transverse plane, the transverse planes being the planes intersecting the fiber perpendicular to the direction of its length.
[0005] La taille moyenne d’un ensemble de fibres est la moyenne arithmétique des longueurs de ces fibres. The average size of a set of fibers is the arithmetic mean of the lengths of these fibers.
[0006] On appelle «film» une feuille, généralement souple, d’une épaisseur inférieure à 1 mm. "Film" is a sheet, generally flexible, with a thickness of less than 1 mm.
[0007] On appelle «non tissé» un feutre composé de fibres végétales, synthétiques, ou artificielles d’un poids allant de 15 à 1500 g/m<2>et d’une épaisseur allant de 0.5 à 25 mm et réalisée par voie sèche, humide ou papetière. "Nonwoven" is a felt composed of vegetable, synthetic or artificial fibers with a weight ranging from 15 to 1500 g / m <2> and a thickness ranging from 0.5 to 25 mm and produced by dry, wet or paper.
[0008] On appelle «plaque rigide» une feuille d’une épaisseur supérieure à 5 mm. [0008] A "rigid plate" is a sheet having a thickness greater than 5 mm.
[0009] Un objectif de la présente invention est de fournir un matériau isolant répondant, aux nouvelles contraintes de performances thermiques et acoustiques. An object of the present invention is to provide an insulating material responding to the new constraints of thermal and acoustic performance.
[0010] A cet effet, l’invention propose un matériau composite isolant thermiquement et acoustiquement. For this purpose, the invention provides a thermally and acoustically insulating composite material.
[0011] Le matériau composite isolant selon l’invention est caractérisé par le fait qu’il comprend au moins une première couche appelée âme, que ladite âme est un nappé comprenant au moins des fibres de bois, des fibres végétales choisies parmi le groupe comprenant du coton, et ou du chanvre et/ou du jute et/ou du lin et des agents de liage, qu’en pourcentages en masse par rapport à la masse de l’âme, les fibres de choisies parmi ledit groupe varient entre 20 et 75%, les fibres de bois entre 20 et 85% et les agents de liage entre 5 et 30%. The insulating composite material according to the invention is characterized in that it comprises at least a first layer called core, said core is a layer comprising at least wood fibers, plant fibers selected from the group comprising cotton and / or hemp and / or jute and / or flax and binding agents, in percentages by weight relative to the weight of the core, the fibers selected from said group vary between 20 and 75%, wood fibers between 20 and 85% and binding agents between 5 and 30%.
[0012] Le déposant est titulaire d’une demande de brevet FR 1 153 942 concernant un matériau isolant composite utilisant essentiellement de fibres de lin. Les éléments isolants ainsi obtenus présentent une faible rigidité et leur manipulation et leur utilisation dans certaines applications n’est pas très aisée sans l’adjonction d’un élément plus rigide. The applicant holds a patent application FR 1 153 942 concerning a composite insulating material using mainly flax fibers. The insulating elements thus obtained have a low rigidity and their handling and use in some applications is not very easy without the addition of a more rigid element.
[0013] Si l’on choisit, selon l’invention, les fibres de bois et de chanvre on obtient une meilleure rigidité au produit isolant. En plus, les fibres de chanvre apportent au produit isolant une meilleure résistance à l’eau et une grande résistance à la décomposition. Le chanvre est aussi une barrière de protection contre l’attaque microbienne du végétal. En effet, de par sa nature chimique, le chanvre est une matière extrêmement résistante à divers agents chimiques et à la dégradation biologique. If one chooses, according to the invention, the wood fibers and hemp one obtains a better rigidity to the insulating product. In addition, hemp fibers provide the insulation product with better water resistance and resistance to decomposition. Hemp is also a protective barrier against microbial attack of the plant. Indeed, because of its chemical nature, hemp is a material extremely resistant to various chemical agents and biological degradation.
[0014] Si à la place des fibres de chanvre on choisit les fibres de jute on obtient à densité équivalente à d’autres fibres végétales, par exemple au chanvre, des produits plus rigides et une meilleure tenue mécanique. On peut bien sûr utiliser les fibres cueillies dans un champ de culture de jute pour fabriquer le produit isolant mais on peut aussi procéder au recyclage de sacs de jute utilisés habituellement pour le stockage de certains produits comme les fèves de café ou de cacao ou autres denrées alimentaires. On procède d’abord au défibrage de sacs de jute et ensuite on recycle les fibres de jute pour fabriquer le matériau isolant. En résumé, les fibres de jute apportent au produit isolant une meilleure rigidité, une meilleure résistance à l’eau et une grande résistance à la décomposition. En plus le jute est une barrière de protection contre l’attaque microbienne du végétal. En effet, de par sa nature chimique, le jute est une matière extrêmement résistante à divers agents chimiques et à la dégradation biologique. If instead of hemp fibers is chosen jute fibers are obtained at equivalent density to other plant fibers, for example hemp, more rigid products and better mechanical strength. You can of course use the fibers picked in a field of jute culture to make the insulating product, but you can also recycle jute bags used for storing certain products such as coffee or cocoa beans or other foodstuffs. food. Firstly, jute sacks are defibered and then jute fibers are recycled to make the insulating material. In summary, jute fibers provide the insulating product with better rigidity, better water resistance and high resistance to decomposition. In addition, jute is a protective barrier against microbial attack of the plant. Indeed, by its chemical nature, jute is a material extremely resistant to various chemical agents and biological degradation.
[0015] Les fibres de bois sont issues de défibrage des copeaux, de plaquettes. Un défibreur est une machine à moudre le bois qui permet de réduire les copeaux et plaquettes de bois en fibre grâce à un disque fixe et un disque mobile qui tournent à très grande vitesse et pourvus de rainures radiales de plus en plus fines et serrées vers la périphérie. Les copeaux et plaquettes peuvent être issus de bois résineux ou de feuillus. The wood fibers are derived from defibration chips, platelets. A shredder is a wood-grinding machine that reduces fiber chips and wood chips with a fixed disk and a mobile disk that rotate at a very high speed and have radial grooves that are thinner and narrower towards the surface. periphery. Chips and chips can be made from softwood or hardwood.
[0016] Un isolant comprenant de fibres de bois et une des fibres du groupe susmentionné permet de combiner les effets bénéfiques de deux fibres en fonction des applications et du milieu dans lequel les matériaux isolants seront utilisés. An insulator comprising wood fibers and a fiber of the aforementioned group allows to combine the beneficial effects of two fibers depending on the applications and the environment in which the insulating materials will be used.
[0017] Selon une exécution le matériau composite comprend au moins une deuxième couche appelée face, que ladite face est un nappé aiguilleté comprenant en pourcentages en masse par rapport à la masse de la face 5 à 100% de fibres de chanvre et/ou du lin et/ou de bois et/ou d’autres fibres végétales et /ou issues de la filière de recyclage de déchets des textiles. According to one embodiment the composite material comprises at least a second layer called face, said face is a needled nappe comprising in percentages by weight relative to the mass of the face 5 at 100% of hemp fiber and / or the flax and / or wood and / or other vegetable fibers and / or from the recycling of textile waste.
[0018] Par filière de recyclage de déchets des textiles nous entendons de déchets issus de la confection, de la matelasserie, et du domaine ferroviaire et automobile. Ces déchets peuvent être issus de produits neufs ou de produits en fin de vies. By waste textile recycling network we mean waste from clothing, quilting, and railway and automotive. This waste may be from new products or end-of-life products.
[0019] L’âme d’un tel matériau qui est un nappé fait de fibres de bois et/ou de chanvre et/ou de jute et/ou de lin peut malgré tout dans certains cas présenter une rigidité insuffisante. Cette âme se présente sous la forme d’un rouleau ou d’un panneau. Le fait d’ajouter des faces faites d’un nappé aiguilleté, qui est simplement ou de préférence est doublement aiguilleté, lui permet d’augmenter la rigidité. La composition du matériau permet d’absorber l’humidité ambiante et la restituer lorsque les conditions atmosphériques le permettent. Le fait de travailler avec une âme et une face permet d’améliorer l’isolation acoustique et thermique et supprime tout affaissement dans le temps en pose verticale. The core of such a material which is a mat made of wood fibers and / or hemp and / or jute and / or linen may still in some cases have insufficient rigidity. This soul is in the form of a roll or a panel. The fact of adding faces made of a needle-punched blanket, which is simply or preferably is doubly needled, allows it to increase the rigidity. The composition of the material makes it possible to absorb the ambient humidity and to restore it when the weather conditions allow it. Working with a core and a face improves acoustic and thermal insulation and eliminates sagging over time in vertical installation.
[0020] Selon une variante d’exécution, l’âme est située entre deux faces parallèles. According to an alternative embodiment, the core is located between two parallel faces.
[0021] Selon une autre exécution la ou les faces comprennent aussi des agents de liage. According to another embodiment, the face or faces also comprise binding agents.
[0022] Les agents de liage sont choisis parmi des fibres de polyester bi-composant, des fibres en polyéthylène, des fibres en polypropylène, des fibres thermo-liantes à base d’amidon végétal, des poudres thermoplastiques, des résines ou un mélange d’au moins deux de ces agents. The binding agents are chosen from bi-component polyester fibers, polyethylene fibers, polypropylene fibers, thermobonding fibers based on plant starch, thermoplastic powders, resins or a mixture of at least two of these agents.
[0023] Selon une exécution préférée une face au moins est revêtue d’un film et un non tissé comprenant de fibres végétales ou synthétiques ou artificielles. According to a preferred embodiment at least one face is coated with a film and a nonwoven comprising plant fibers or synthetic or artificial.
[0024] Dans le but de répondre à certaines exigences liées à une utilisation spécifique du matériau isolant, une face au moins comprend un agent pulvérisé lui conférant des caractéristiques d’étanchéité à l’eau ou à la vapeur ou l’humidité ou de résistance au feu ou d’accroché. In order to meet certain requirements related to a specific use of the insulating material, at least one face comprises a spray agent conferring water or vapor resistance characteristics or moisture or resistance on fire or hung.
[0025] Selon une variante d’exécution, une face au moins est revêtue d’un film et/ou d’un non tissé comprenant de fibres végétales ou synthétiques ou artificielles. According to an alternative embodiment, at least one face is coated with a film and / or a nonwoven comprising plant fibers or synthetic or artificial.
[0026] De préférence les fibres de chanvre et ou de jute et/ou de lin présentent une taille moyenne comprise entre 10 et 100 mm. Preferably the hemp fibers and or jute and / or linen have an average size of between 10 and 100 mm.
[0027] De préférence, les fibres de bois présentent une taille moyenne comprise entre 2.5 et 50mm. L’invention concerne aussi un élément de construction pour bâtiment ou pour véhicule automobile ou ferroviaire ou pour bâtiment naval ou pour aéronef incorporant moins une couche du matériau tel que défini précédemment. Preferably, the wood fibers have an average size of between 2.5 and 50mm. The invention also relates to a construction element for a building or for a motor vehicle or railway or for naval building or for aircraft incorporating less a layer of the material as defined above.
[0028] L’aiguilleté utilisé pour les faces présente une densité allant de 200g/m<2>à 2000g/m<2>. The needled used for the faces has a density ranging from 200g / m <2> to 2000g / m <2>.
[0029] De préférence, les fibres choisies dans le dit groupe et les fibres de bois présentes dans l’âme sont une teneur comprise respectivement entre 20 et 85%, entre 20 et 75%, de préférence encore entre 30 et 55%, en pourcentages en masse par rapport à la masse totale du matériau composite isolant. Preferably, the fibers selected from said group and the wood fibers present in the core are a content of between 20 and 85%, between 20 and 75%, more preferably between 30 and 55%, respectively. percentages by mass relative to the total mass of the insulating composite material.
[0030] Selon une réalisation particulière, l’âme comprend, en pourcentages en masse par rapport à la masse totale dudit matériau, According to a particular embodiment, the core comprises, in percentages by weight relative to the total mass of said material,
[0031] L’agent liant présent dans le matériau composite isolant a une teneur supérieure à 2%, de préférence supérieure à 10%, voire supérieure à 15%, et/ou inférieure à 50%, de préférence inférieure à 40%, inférieure à 30%, inférieure à 20%, en pourcentages en masse par rapport à la masse totale de l’âme. The binding agent present in the insulating composite material has a content greater than 2%, preferably greater than 10%, or even greater than 15%, and / or less than 50%, preferably less than 40%, lower than at 30%, less than 20%, in percentages by weight relative to the total mass of the core.
[0032] De préférence, les fibres choisies dans ledit groupe et de bois représentent ensemble plus de 80%, plus de 90%, voire plus de 95%, de la masse totale du matériau. De préférence, les fibres choisies dans ledit groupe et de bois, l’agent liant représentent ensemble 100% de la masse totale du matériau composite isolant. Preferably, the fibers selected in said group and wood together represent more than 80%, more than 90% or more than 95% of the total mass of the material. Preferably, the fibers selected in said group and wood, the binder together represent 100% of the total mass of the insulating composite material.
[0033] Un matériau selon l’invention peut prendre différentes formes, et peut notamment se présenter sous la forme d’un produit souple apte à être enroulé, dit «produit enroulable», ou plus rigide, sous la forme d’un panneau. A material according to the invention can take different forms, and can in particular be in the form of a flexible product capable of being wound, called "rollable product", or more rigid, in the form of a panel.
[0034] Un matériau enroulable selon l’invention présente une épaisseur avant enroulement de préférence supérieure à 15 mm, supérieure à 20 mm, supérieure à 30 mm, de préférence supérieure à 40 mm, voire supérieure à 45 mm et/ou, de préférence, inférieure à 500 mm, inférieure à 400 mm, inférieure à 300 mm, inférieure à 250 mm, voire inférieure à 200 mm. A rollable material according to the invention has a thickness before winding preferably greater than 15 mm, greater than 20 mm, greater than 30 mm, preferably greater than 40 mm, or even greater than 45 mm and / or, preferably , less than 500 mm, less than 400 mm, less than 300 mm, less than 250 mm, or even less than 200 mm.
[0035] Un matériau enroulable selon l’invention présente une longueur de préférence supérieure à 1 m, supérieure à 2 m, supérieure à 3 m, voire supérieure à 4 m et/ou, de préférence, inférieure à 15 m, inférieure à 12 m, inférieure à 10 m, voire inférieure à 9 m. A rollable material according to the invention has a length preferably greater than 1 m, greater than 2 m, greater than 3 m, even greater than 4 m and / or, preferably, less than 15 m, less than 12. m, less than 10 m, or even less than 9 m.
[0036] Un matériau enroulable selon l’invention présente une largeur de préférence supérieure à 0,30 m, supérieure à 0,45 m, supérieure à 0,55 m et/ou, de préférence, inférieure à 1 m, inférieure à 0,90 m, inférieure à 0,75 m, voire inférieure à 0,65 m. A rollable material according to the invention has a width preferably greater than 0.30 m, greater than 0.45 m, greater than 0.55 m and / or, preferably, less than 1 m, less than 0. , 90 m, less than 0.75 m, or even less than 0.65 m.
[0037] De préférence, un matériau enroulable selon l’invention présente encore une densité supérieure à 20 kg/m<3>, de préférence supérieure à 40 kg/m<3>, de préférence supérieure à 50 kg/m<3>, et/ou inférieure à 120 kg/m<3>, de préférence inférieure à 60 kg/m<3>et notamment inférieure à 40 kg/m<3>. Preferably, a rollable material according to the invention also has a density greater than 20 kg / m <3>, preferably greater than 40 kg / m <3>, preferably greater than 50 kg / m <3>. and / or less than 120 kg / m <3>, preferably less than 60 kg / m <3> and in particular less than 40 kg / m <3>.
[0038] Un panneau selon l’invention présente une épaisseur de préférence supérieure à 30 mm, supérieure à 70 mm, supérieure à 100 mm et/ou, de préférence, inférieure à 600 mm, inférieure à 400 mm, inférieure à 300 mm, inférieure à 200 mm. A panel according to the invention has a thickness preferably greater than 30 mm, greater than 70 mm, greater than 100 mm and / or, preferably, less than 600 mm, less than 400 mm, less than 300 mm, less than 200 mm.
[0039] Un panneau selon l’invention présente une longueur de préférence supérieure à 0,70 m, supérieure à 0,90 m, supérieure à 1,10 m, supérieure à 1,20 m et/ou, de préférence, inférieure à 3 m, inférieure à 2 m, inférieure à 1,50 m, inférieure à 1,30 m. A panel according to the invention has a length preferably greater than 0.70 m, greater than 0.90 m, greater than 1.10 m, greater than 1.20 m and / or, preferably, less than 1.20 m. 3 m, less than 2 m, less than 1.50 m, less than 1.30 m.
[0040] Un panneau selon l’invention présente une largeur de préférence supérieure à 0,20 m, supérieure à 0,45 m, supérieure à 0,55 m et/ou, de préférence, inférieure à 1 m, inférieure à 0,90 m, inférieure à 0,75 m, voire inférieure à 0,60 m. A panel according to the invention has a width preferably greater than 0.20 m, greater than 0.45 m, greater than 0.55 m and / or, preferably, less than 1 m, less than 0, 90 m, less than 0.75 m, or even less than 0.60 m.
[0041] Un panneau selon l’invention une densité de préférence supérieure à 20 kg/m<3>, de préférence supérieure à 40 kg/m<3>, de préférence supérieure à 50 kg/m<3>et inférieure à 200 kg/m<3>de préférence inférieure à 150 kg/m<3>et notamment inférieure à 60 kg/m<3>. A panel according to the invention a density preferably greater than 20 kg / m <3>, preferably greater than 40 kg / m <3>, preferably greater than 50 kg / m <3> and less than 200. kg / m <3> preferably less than 150 kg / m <3> and in particular less than 60 kg / m <3>.
[0042] Selon une réalisation particulière, l’invention se présente sous la forme d’un panneau en matériau composite isolant selon l’invention présentant une grande face, voire deux grandes faces, revêtue(s), au moins partiellement, d’un film, de préférence un film étanche à la vapeur d’eau. Ledit film peut être avantageusement choisi parmi un film composite, de préférence souple, par exemple un film en papier kraft-aluminium, un film non-tissé, un frein vapeur, un film plastique. De préférence, ledit film est en papier kraft-aluminium. According to a particular embodiment, the invention is in the form of a panel of insulating composite material according to the invention having a large face, or even two large faces, coated (s), at least partially, a film, preferably a vapor-tight film. Said film may advantageously be chosen from a composite film, preferably a flexible film, for example a kraft-aluminum paper film, a nonwoven film, a vapor brake or a plastic film. Preferably, said film is made of kraft-aluminum paper.
[0043] Selon une autre de réalisation particulière, ledit matériau composite isolant est lié, notamment au niveau d’au moins une de ses grandes faces, par exemple par collage, soudage à chaud, ultra-sons, couture ou toute autre méthode adaptée, à au moins une plaque rigide. La plaque rigide peut être choisie parmi des plaques de plâtre, de gypse, de bois, de bois composite, ou de panneaux de particules. Ces matériaux permettent de fabriquer des panneaux de contreventement, de finition, de protection contre les diverses projections, de résistance au feu. According to another particular embodiment, said insulating composite material is bonded, especially at at least one of its large faces, for example by gluing, heat welding, ultrasound, sewing or any other suitable method, at least one rigid plate. The rigid plate may be selected from plasterboard, gypsum, wood, composite wood, or particle board. These materials make it possible to manufacture bracing panels, finishing, protection against various projections, fire resistance.
[0044] Un élément de construction selon l’invention peut se présenter sous la forme d’une superposition de couches, au moins une des couches étant en matériau composite isolant conforme à l’invention et au moins une des couches étant en un matériau complémentaire. A building element according to the invention may be in the form of a superposition of layers, at least one of the layers being of insulating composite material according to the invention and at least one of the layers being a complementary material. .
[0045] Un tel élément peut en outre présenter une grande face, voire deux grandes faces, revêtue(s), au moins partiellement, d’un film tel que défini précédemment. Such an element may also have a large face, or two large faces, coated (s), at least partially, a film as defined above.
[0046] L’élément de construction incorporant au moins une couche de matériau peut être utilisé pour le bâtiment, pour les véhicules automobiles ou ferroviaires ou pour un bâtiment naval ou pour un aéronef en particulier pour assurer une isolation thermique et/ou acoustique. The building element incorporating at least one layer of material may be used for the building, for motor vehicles or rail or for a naval building or for an aircraft in particular to provide thermal insulation and / or acoustic.
Claims (10)
Priority Applications (1)
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CH00031/14A CH709109A2 (en) | 2014-01-13 | 2014-01-13 | composite thermal and acoustical insulation material. |
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CH00031/14A CH709109A2 (en) | 2014-01-13 | 2014-01-13 | composite thermal and acoustical insulation material. |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN114450247A (en) * | 2019-09-24 | 2022-05-06 | 宜家供应有限公司 | Soft cushion comfort member comprising lignocellulosic fibers |
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2014
- 2014-01-13 CH CH00031/14A patent/CH709109A2/en not_active Application Discontinuation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN114450247A (en) * | 2019-09-24 | 2022-05-06 | 宜家供应有限公司 | Soft cushion comfort member comprising lignocellulosic fibers |
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