Method for Producing a Perforated Web and Product for a Sanitary Absorbent Article Thereof

摘要

A method for producing a low density perforated web material having a thickness of at least 0.20 mm, comprising the steps of:
providing a layer of low density material having a maximum overall weight per square meter of 75 g/m2 or less; andprocessing the low density material between two rollers pressing onto each other to obtain a low density perforated web material, wherein a first roller has protrusions to perforate the low density material, and a second roller rotates at a different speed from that of the first roller and has projecting parts with contact areas arranged to perforate the material with the protrusions, the contact areas being spaced by recesses to receive the material and having larger contact face dimensions than the protrusions, the recesses leaving an impression in relief on the low density polymer material.

主权项

1. A method for producing a material comprising a perforated low density web polyolefin material (20) having a thickness of at least 0.20 mm, comprising the step of:
providing a layer of low density material comprising a polyolefin material having a maximum total weight per square meter of 75 g/m̂2 or lower; and processing the low density material (20) between two rollers (3, 4) pressing onto each other to obtain a perforated low density web material (20), wherein a first roller (3) has protrusions (6) to perforate the low density material, and a second roller (4) rotates at a different speed from that of the first roller (3) and has projecting parts (8) with contact areas (10) arranged to perforate the material with the protrusions (6), the contact areas (10) being spaced by recesses (9) to receive the material and having larger dimensions than contact faces (7) of the protrusions (6), the recesses (9) leaving an impression in relief (I) on the low density polymer material.