Method of manufacture for a fabric useful in a disposable diaper
US4073852A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 13, 1976 |
| Grant date | Feb 14, 1978 |
| Priority date | — |
| Expiry date | May 13, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24942
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method for preparing a non-woven fabric which is less wettable in its marginal portions than in its central portion. The fabric comprises a highly water-absorbent web of mixed long and short fibers that is through-bonded throughout its dimensions with a binder (adhesive) to retain the fibers in their assembled relationship. Since the binder, in its final set stage, is hydrophobic in character and renders the resulting fabric more or less water repellent, the invention involves treatment of the mid-portion of the bonded fabric with a wetting agent (surfactant) to minimize the water-repellent effect of the binder and to make the mid-portion of the fabric readily wettable. Marginal portions of the bonded fabric are not treated with a wetting agent, so that these portions of the fabric throughout their dimensions are more or less water repellent. By this is meant that the marginal portions of the bonded fabric are difficultly wettable as compared to the mid-portion of the fabric. As indicated, the binder material at the side edges of the fabric is present throughout the thickness of the fabric, and hence it is effective to prevent liquid that is wetted into the central portion of the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.