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US 2017/0137977 A1Published application
Oriented tape for the production of woven fabrics and products produced therefrom
AssigneeGrief Flexibles Trading Holding B.V.
InventorsWolfgang Lehmann, Jeffrey L. Hemmer, Eldridge M. Mount, III
Life of this patent
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Abstract
A machine-direction oriented tape comprising a blend of 65-95% wt % HDPE and 5-35% wt % PP optionally including fillers and UV additives displays physical and UV stability properties at least equal to commercially available oriented tape produced from PP or PE and can be used to produce woven fabric for applications such as ground cover and FIBC bags.
Claims20
An oriented polyolefin tape comprising an extruded and stretched melt blend comprising the components:
- (a) 5 to 35 wt % 0.5-8 MFI (230° C./2.16 kg) polypropylene homopolymer,
- (b) 65 to 95 wt % 0.1-3.5 MFI (190° C./2.16 kg) of high density polyethylene,
- (c) 0-30 wt % of at least one filler,
- (d) 0-3 wt % of at least one UV additive, and
- (e) 0-5 wt % of at least one compatibilizer to form a melt blend.
2 more elements
A process of making an oriented polyolefin tape comprising:
- (a) melt blending
- (i) 5-35 wt % 0.5-8 MFI (230° C./2.16 kg) polypropylene homopolymer,
- (ii) 65-95 wt % 0.1-3.5 MFI (190° C./2.16 kg) high density polyethylene,
- (iii) 0-30 wt % of at least one filler,
- (iv) 0-3 wt % of at least one UV additive,
- (v) and 0-5 wt % of at least one compatibilizer to form a melt blend,
- (b) extruding the melt blend at 220-295° C. through a die to form an extrudate,
- (c) water quenching the extrudate,
- (d) slitting the extrudate to form at least one tape, and
- (e) heating and stretching the at least one tape at 50-500 m/min and 80-140° C.
7 more elements
Dependencies are inferred from the claim text.