Patent ID: 7363686

Claim:
A ribbon-shaped nonmetallic twist tie having a core part and a wing part constituted from a non-halogenous material, characterized in that the core part and wing part each extend the length of the tie, the tie having a total width of 1.5 to 20.0 mm, a maximum thickness of the wing part of 0.02 to 0.20 mm, a maximum thickness of the core part of 0.04- to 0.30-fold of the total width, and a property of retaining a fixed shape of 95% or less, where the property of retaining a fixed shape is determined by: preparing a sample tie having two ends and a length of 80 mm; marking lines M a predetermined distance apart at the central portion of the sample tie; bending the sample tie to align the ends of the sample tie and to align the marked lines M; applying 80 g of load at the marked lines M; removing the load; determining a straight line distance l 2 between the marked lines M immediately after removing the load; determining a straight line distance l 3 between the marked lines M two minutes after removing the load; and determining the property of retaining a fixed shape R, where R={ 1−( l 3 −l 2 )/( l 3 )}×100.