Article and process for the manufacture of a carrier web
US4125663A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 2, 1977 |
| Grant date | Nov 14, 1978 |
| Priority date | — |
| Expiry date | May 2, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/681
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process is described for the production of a carrier web of a spun bond consisting of synthetic polyester filaments having a melting point of more than 230.degree. C and a filament titer of approximately 3 to 15 dtex. To this spun bond, a chemical binder is applied in the form of an aqueous dispersion which is dried at approximately 120.degree. to 220.degree. C. The dispersion consists of PA1 (a) 10 to 60% by weight of a copolymer of PA1 60 to 90% by weight of styrene, PA1 5 to 20% by weight of butadiene, PA1 2 to 10% by weight of acrylic acid and PA1 2 to 10% by weight of acrylamide, PA1 (b) 5 to 30% by weight, calculated on the amount of copolymer, of a melamine formaldehyde precondensate, PA1 (c) a catalytic amount of acid catalysts, as well as, optionally, PA1 (d) further inert additives. Such a carrier web is characterized by PA0 a weight per unit area of approximately 80 to 400 g/m.sup.2 PA0 A strength, longitudinally, of approximately 30 to 140 daN/5 cm, PA0 An elongation at break, longitudinally, of approximately 20 to 50%, PA0 A break propagation resistance of approximately 2 to 9 daN, PA0 a specific resistance of at least 38 (daN/5 cm) : (100 g/m.sup.2) and PA0 A specif…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.