The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 30, 1978
Filed:
Jul. 22, 1976
Anthony Frank Aspin, Knutsford, EN;
Abstract
There is disclosed a process for making fibrous material which is particularly suitable for the manufacture of baler twine. The material is preferably made from polypropylene and is produced from film which is roll-embossed and fibrillated, the roll-embossing temperature being substantially lower than the conventional roll-embossing temperature. In the case of polypropylene film this is within the range 60.degree. C to 90.degree. C, preferably about 80.degree. C. As a result, the fibrous material has a high proportion of clusters of from 2 to 5 unseparated incipient filaments. Baler twine made from the material is economical to produce and has improved physical characteristics especially good strength combined with good knot retention ability.