Patent ID: 11859322
Assignee: SPILLTECH ENVIRONMENTAL, INC.
Field: Other special machines (Mechanical engineering)
Classification: CPC D  B | IPC B  D

Claim 0:
1. A method of making multi-layer meltblown mats comprising:
depositing first meltblown fibers onto a first moving surface to form a first layer of meltblown fibers;
depositing second meltblown fibers onto a second moving surface to form a second layer of meltblown fibers;
feeding the first layer of meltblown fibers and the second layer of meltblown fibers through opposed rollers to form combined meltblown layers comprising the first layer of meltblown fibers and the second layer of meltblown fibers; and
bonding the combined meltblown layers to produce a bonded multi-layer meltblown sheet, wherein the bonded multi-layer meltblown sheet has a first outer exposed surface formed by contact of the first layer of meltblown fibers with the first moving surface and a second outer exposed surface formed by contact of the second layer of meltblown fibers with the second moving surface.