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US 4,451,315 AGranted
Process for producing a non-woven fabric
AssigneeFirma Carl Freudenberg
InventorTadashi Miyazaki
Life of this patent
Estimating the term…
Abstract
This application discloses a process for producing a non-woven fabric which comprises applying a crosslinkable bonding agent to a portion of the surface of a fiber assembly, applying heat and pressure to drive the crosslinkable bonding agent into the fiber assembly and to densify the fiber assembly and subsequently crosslink the bonding agent.
Claims18
A process for preparing a pliable and durable non-woven fabric comprising:
- a. printing a crosslinkable bonding agent in a patterned fashion onto one surface of a non-woven fiber assembly,
- b. applying heat and pressure to the fiber assembly sufficient to cause the bonding agent on the surface of the fiber assembly to penetrate through the fiber assembly to the surface of the fiber assembly opposite to the surface to which the bonding agent was originally applied thereby densifying portions of the fiber assembly, said heat and pressure being insufficient to crosslink the bonding agent, and
- c. applying heat to the fiber assembly sufficient to crosslink the bonding agent and to provide a pliable non-woven fabric having a distinct unevenness between the bonded and unbonded parts, wherein the areas of fiber assembly to which bonding agent has not been applied have a thickness about equal to the original thickness of the fiber assembly.
Dependencies are inferred from the claim text.