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Patents

Method of Applying Bulk Glue for Nursing Pad Base Film

U.S. Patent No. 9,248,057 B2

Author Image

By: Tara Olivo

Associate Editor at Nonwovens Industry, Rodman Media

Qiuhong Li, Beijing, China. Assigned to Beijing Beishute Maternity & Child Articles., LTD, Beijing, China.
Filed: 8/16/12
Issued: 2/2/16
A method for applying large areas of glue to four corners of a bottom film of an absorbent pad of a health care article, the method comprising: (a) gluing and conveying a release paper: providing a pair of rubber rollers which pull a release paper from a release paper roll, synchronizing a conveying speed of the release paper and a speed of a machine manufacturing the absorbent pad; wherein the conveying speed of the release paper and the speed of the manufacturing machine are synchronized with an independent release paper unwinding motor controlled by a programmable logic controller (PLC) and an inverter; providing intermittent glue to the release paper by an automatically controlling glue gun; wherein the glue is a hot melt glue with a higher use temperature between 160° C.-180° C.h

Ten conveying the glued release paper by a conveying flat belt; wherein a surface of the conveying flat belt has a plurality of vent holes, and wherein the conveying flat belt is connected with a negative pressure air pump; (b) cutting the glued release paper: conveying the glued release paper to a knife chisel and a knife roller which are rotated and cut the glued release paper; wherein the knife chisel has a smooth surface which includes a high hardness material, wherein a diameter of the knife chisel is greater than that of the knife roller; wherein the knife chisel includes suction holes uniformly arranged on the surface, and wherein the suction holes are connected to a negative pressure air pump; the knife roller includes a release paper knife fixed thereon by a knife holder; an angle of the release paper knife is adjusted through the change of an angle of the knife holder; wherein the release paper knife is a straight knife and fixed between an upper knife holder and a lower knife holder with 1° of angle along the length of the knife holder; and (c) transferring the intermittent glue on the release paper: contacting the intermittent glue carried on the release paper and the bottom film of the absorbent pad.

Compressing the glue between the release paper and the bottom film with a compressing roller which is preloaded by a spring; wherein the absorbent pad passes through a gap between the compressing roller and the knife chisel; thereby firmly adhering the glue to the bottom film of the absorbent pad and completing the adhesion of the glued release paper and the bottom film of the absorbent pad; wherein the compressing roller is a silicone roller.

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