LOW-EMISSION MELAMINE FORMALDEHYDE NONWOVENS AND NONWOVEN MATERIALS

Melamine-formaldehyde-based nonwovens or nonwoven materials and methods for the production thereof are provided. Melamine formaldehyde resin with a low formaldehyde fraction, preferably with virtually complete etherification of the methylol groups with methanol, is used. The resin is spun via a melt...

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Bibliographic Details
Main Authors KINDLER Christoph, EWERT Yvonne
Format Patent
LanguageEnglish
Slovenian
Published 31.03.2023
Subjects
BRAIDING
COTTON-WOOL
FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS
KNITTING
LACE-MAKING
MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL
NON-WOVEN FABRICS
TEXTILES
TRIMMINGS
WADDING
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Summary:Melamine-formaldehyde-based nonwovens or nonwoven materials and methods for the production thereof are provided. Melamine formaldehyde resin with a low formaldehyde fraction, preferably with virtually complete etherification of the methylol groups with methanol, is used. The resin is spun via a melt-blow process, with a mass flow melt per nozzle of 0.3 to 3.0 g/min. A gas stream at a temperature of 130 to 330° C. flows at the mass flow melt. The formed fibers and/or flakes are laid to form a nonwoven material and treated with gaseous HCl, followed by thermal treatment in which air flows at or through the nonwoven material to increase heat transfer. The temperature is raised in stages to 260 to 340° C. The material is then kept at temperature for 5 to 90 minutes, followed by rapid cooling. The nonwovens or nonwoven materials are suitable as thermal insulators or sound insulation material.
Bibliography:Application Number: SI20170031306T