Paper making and fiber liberation – Processes and products – Non-fiber additive
Patent
1975-04-07
1977-01-18
Lindsay, Jr., Robert L.
Paper making and fiber liberation
Processes and products
Non-fiber additive
162206, 162361, D21H 524
Patent
active
040037835
ABSTRACT:
A method for compacting a nonwoven fabric impregnated with a thermoplastic binder at a temperature higher than the softening temperature of the binder to improve hand and drape of the fabric. A bar compresses a relatively thick endless elastomeric belt against a steam heated drum so that a nip is formed therebetween. The nonwoven fabric is passed through the nip between the belt and the drum and thence onto the drum. The nonwoven fabric adheres frictionally to a stretched surface of the belt as it goes through the nip and is thereafter compacted by the belt as the belt unstretches onto the drum. Fibers of the fabric are crowded together, rearranged and crimped locally (all between the faces of the fabric) and more of the fibers of the fabric are caused to be oriented crosswise. To allow compacting at sufficiently high temperatures (160.degree. - 280.degree. F.) without sticking of the fabric to the drum due to the binder, as well as to obviate need for addition of release agents to the drum surface, the drum is lined with tetrafluoroethylene resin (available commercially as TEFLON, a trademark of Du Pont de Nemours & Co.).
REFERENCES:
patent: 3011545 (1961-12-01), Welsh et al.
patent: 3329556 (1967-07-01), Mc Falls et al.
patent: 3515633 (1970-06-01), Futch, Jr.
patent: 3525787 (1970-08-01), Mc Dermott
patent: 3812000 (1974-05-01), Salvucci, Jr. et al.
Groome Ernest J.
Hamrick Henry L.
Clupak, Inc.
Fisher Richard V.
Lindsay, Jr. Robert L.
LandOfFree
Method for compacting a nonwoven fabric impregnated with a therm does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for compacting a nonwoven fabric impregnated with a therm, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for compacting a nonwoven fabric impregnated with a therm will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-70423