Composite sheet structure
US4310594A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1980 |
| Grant date | Jan 12, 1982 |
| Priority date | — |
| Expiry date | Jul 1, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/629
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A composite sheet structure comprising (A) a nonwoven web composed of (a) continuous filaments of a synthetic resin and (B) a net-like web having intersecting points and being composed of (b) continuous net strands of a mixture consisting of at least two thermoplastic synthetic resins having different melting points, said web (A) and said web (B) being bonded to each other by heating; characterized in that (i) said web (A) has a basis weight of about 2 to about 30 g/m.sup.2, (ii) said web (B) has a basis weight of about 1 to 10 g/m.sup.2, an average net strand diameter of about 1 to about 100 microns, and an average mesh length of up to about 5 mm, and said net strands (b) are composed of at least two resins having melting points differing from each other by at least about 20.degree. C., of which a resin having the lowest melting point has a melting point at least about 20.degree. C. lower than that of said filaments (a) and is present in an amount of about 5 to about 95% by weight based on the weight of said resin mixture, (iii) the amount of said web (A) is about 30 to about 90% by weight based on the total weight of said webs (A) and (B), (iv) said composite sheet structure has …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.