Abstract:
According to one aspect of the present invention there is provided an acoustic laminate including: a first layer of viscoelastic acoustic barrier material; a sound absorbing/decoupling batt affixed to the first layer of viscoelastic acoustic barrier material, the batt at rest defining a batt plane; the batt including a plurality of batt fibres; the batt further including retaining fibres, wherein the batt fibres and/or retaining fibres are disposed perpendicular to the batt plane and having end portions thereof disposed at a batt surface, the end portions affixed to the viscoelastic barrier material so that either the first layer of viscoelastic acoustic barrier material or the sound absorbing/decoupling batt itself may be retained in spaced relation from a mounting surface when the laminate is so mounted, the retention being achieved in any orientation by bearing a mass load of the batt or first layer of viscoelastic material along the axis of the affixed batt fibres and/or retaining fibres.
Abstract:
La présente invention concerne l'utilisation de glycérol en tant qu'additif pour encollages aqueux, exempts de formaldéhyde, à base de polymère acrylique ou acrylate destinés à la fabrication de produits à base de laine minérale, pour améliorer la résistance au vieillissement de produits à base de laine minérale obtenus après réticulation de l'encollage. Les produits à base de laine minérale liée avec un tel encollage qui respecte l'environnement présentent la même qualité que les produits liés de manière classique avec une résine phénolique. La reprise en épaisseur et la flexion des produits obtenus sont améliorées.
Abstract:
A process for forming thermoplastic composites (295) that uses wet use chopped strand glass is provided. Wet reinforcement fibers such as wet chopped strand glass fibers are opened by passing the fibers consecutively through a first opener (210), a condenser (220), and, optionally, a second opener (230). The opened reinforcement fibers are mixed with a resin (240) and transferred to a first sheet former (270). The resin is preferably polypropylene fibers. An optional second sheet former may be used to form a final composite having high structural integrity. The resulting sheet may be optionally passed through a needle felting machine (280) for mechanical strengthening. The sheet is then passed through a thermal bonder (290) to thermally bond the reinforcement glass fibers and resin. The composite product that exits the thermal bonder can be subsequently used as a reinforcement in a molding process to produce composite articles.
Abstract:
The properties of mineral fibres comprising silicon, magnesium, calcium, iron, aluminium and oxygen atoms are improved by exposure to a heat treatment under oxidising conditions which causes migration of MgO, thereby creating an outer layer with increased concentrations of MgO. Batts and other fibrous products containing the fibres have increased resistance to shrinkage and sintering.
Abstract:
Produit d'isolation encapsulé, comprenant un matelas (1) de fibres, et un revêtement recouvrant les deux surfaces principales (2, 3) et les deux surfaces latérales (4, 5) du matelas, ce revêtement comportant un premier moyen de recouvrement en forme de bande (6) qui couvre au moins une partie centrale de la première surface principale (2) sans s'étendre au-delà d'elle et en étant liée à celle-ci, et un deuxième moyen de recouvrement (7-9) qui couvre la deuxième surface principale (3) du matelas, ses deux surfaces latérales (4, 5) et des parties marginales de sa première surface principale caractérisé en ce que le deuxième moyen de recouvrement est lié aux première et deuxième surfaces principales et flotte librement le long des surfaces latérales opposées (4, 5) du matelas.
Abstract:
The invention relates to mats, especially mats for use as grass mats, slope mats, erosion control mats, geotextile mats with and without seeds, ballast bed grass mats, road verge grass mats, roof grass mats, mulch mats, mattresses and mattress covers, cow mattresses, insulating jackets (heat, cold, noise), packaging mats, piglet mats, filter mats, especially filter mats for bordering and fringing drainage pipes, air cooler mats (for condenser air-conditioning, fiber material: excelsior that is wetted with water for use), screening mats, etc. It is already known to produce stitched mats, their major drawback however is that for certain applications, for example when establishing green spaces on roofs, meshed wovens or unwovens are required, thereby rendering the entire mat very expensive. Even if the meshed woven consists of a biodegradable plastic there is often a requirement for mats in which no plastic whatsoever is included. The aim of the invention is therefore to provide an improved mat that does not have the above-mentioned drawbacks. This aim is achieved by the mat according to claim 1 of the invention. Advantageous embodiments are described in the subclaims. The inventive mat comprises at least one layer of a fiber material, especially a synthetic and/or natural fiber material. The layer is stitched in itself and a plurality of seams is arranged side by side to stabilize the mat. Every seam is formed by at least one thread and the threads of one seam are interlaced with the threads of the left and/or right neighboring seam, a chain stitch being used for establishing the seam.
Abstract:
The apparatus for producing layers from rock fibers and similar insulating materials consists of a conveyor (1) of the collection chamber, a receiving conveyor (2), at least two pairs of vertical oscillating belts (3, 5), at least one feeding conveyor 4, and at least one deposit conveyor 6. The fibers are transported by the conveyor (1) to the receiving conveyor (2), which then carries them into nip formed by the first pair of vertical oscillating belts (3), which in turn, deposit the fibers in a zigzag onto the first feeding conveyor (4), from where they pass between the second pair of vertical oscillating belts (5), which deposit them in a zigzag onto the first deposit conveyor (6), wherein the zigzag deposition may be repeated so that the layer of fibers entering the hardening chamber consists of two or more transversally deposited layers, laid at an angle of 90 DEG relative to each other. .
Abstract:
Process for providing a binder for mineral wool products, said process comprising the steps of: mixing together under reactive conditions a carboxylic acid with an alkanolamine, whereby optionally these are firstly mixed to provide a resin which resin is subsequently reacted with a separate carboxylic acid group containing polymer.
Abstract:
The invention concerns an insulating product based on mineral wool sized with a binder based on phenol-formaldehyde resin, wherein the binder comprises in a mixture: 60 to 90 parts by weight of a phenol-formaldehyde resol having a free formaldehyde rate not more than 25 wt. % relative to the resin dry weight and a proportion of free phenol not more than 2.5 wt. % relative to the resin dry weight obtained by condensation in basic medium of phenol (P) and of formaldehyde (F) in a F/P mol ratio of the order of 2.5 to 4 until the condensation product neutralised by sulphuric acid has a dilutability in water higher than 500 % and not more than 1500 %; 10 to 40 parts of urea. Said sizing composition is useful for making insulating products reducing ammonia emissions on the production line.