LOW-EMISSION MELAMINE FORMALDEHYDE NONWOVENS AND NONWOVEN MATERIALS

The invention relates to melamine-formaldehyde-based nonwovens or nonwoven materials and to a method for the production thereof. A melamine formaldehyde resin with a low formaldehyde fraction, preferably with an M:F ratio of 1:2 and virtually complete etherification of the methylol groups with metha...

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Bibliographic Details
Main Authors EWERT YVONNE, KINDLER CHRISTOPH
Format Patent
LanguageChinese
English
Published 04.06.2019
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:The invention relates to melamine-formaldehyde-based nonwovens or nonwoven materials and to a method for the production thereof. A melamine formaldehyde resin with a low formaldehyde fraction, preferably with an M:F ratio of 1:2 and virtually complete etherification of the methylol groups with methanol, is used. A mass flow melt per nozzle of 0.3 to 3.0 g/min is spun at a temperature of 80 to 200DEG C. A gas stream at a temperature of 130 to 330 DEG C flows at the mass flow melt. The formed fibres and/or flakes are laid to form a nonwoven material and treated with gaseous HCl, followed by a thermal treatment in which air flows at or through the nonwoven material to increase transfer of heat. The temperature is raised in stages to up to 340 DEG C; the temperature is raised by no more than20 DEG C/min in the range between 80 DEG C and 160 DEG C and then by up to 100 DEG C/min. The material is then kept at the previously reached temperature of up to 340 DEG C for 5 to 90 minutes, with partial replacement of the
Bibliography:Application Number: CN201780062888