Nonwoven/film biodegradable composite structure
US5783504A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1996 |
| Grant date | Jul 21, 1998 |
| Priority date | — |
| Expiry date | Apr 26, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/689
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Composite structure comprising one or more plies of nonwoven and one or more plies of film, these being manufactured from thermoplastics, wherein all the plies of nonwoven of which the structure is composed are totally manufactured from a polymer or a copolymer or a blend of polymers derived from lactic acid and wherein all the plies of film are totally manufactured from a polymer of the BAPE (biodegradable aliphatic polyester) type. The invention also relates to a process for manufacturing said composite structure. Application: Diapers, sanitary napkins, protective garments, surgical drapes and masks in the medical field and certain products for absorption and filtration, protection of plants in agriculture and mulching.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.