Inteplast Corporation

Peter Chen

Ben Tseng

Ching-Shu H Lin

Andy Yang

Raphael Li

Rajender Singh

The present invention relates to a blown film forming composition which improves the clarity, haze and gloss while improving or maintaining the mechanical properties of the high density polyethylene film. The film forming composition includes about 50 to about 99% by weight of an ethylene polymer of density in the range of about 0.940 g/cm.sup.3 to about 0.970 g/cm.sup.3 and a melt index of no more than 1.0 g/10 min. measured at 190.degree. C. and 5 Kg load and about 50 to about 1% by weight of an additive consisting of (a) about 10 to 100% of a plastomer-type ethylene polymer of density in the range of about 0.900 to about 0.920 g/cm.sup.3 and of melt index from about 0.1 to about 10 g per 10 minutes, and (b) about 90 to 0% of a copolymer of ethylene and vinyl acetate of density from about 0.910 to about 0.940 g/cm.sup.3 and of melt index ranging between about 0.1 and about 10 g/10 min.

Polymer blend composition for forming transparent polyethylene film

A method for manufacturing automatic consecutively opened thermoplastic T-shirt bags for dispensing from a conventional supporting rack. The method involves providing a continuous flattened tube of thermoplastic film and applying adhesive solution using a printing press to form adhesion regions on the outside of the tube. The adhesive solution can be applied using a flexo or gravure printing process. The method then involves forming side gussets in the tube and making traverse seals in the tube, thereby dividing the tube into pillowcases. The pillowcases are separated at the seals to form a series of end-sealed gussetted pillowcases which are stacked to form a bag pack. Next, the bag pack is cut along a bag-mouth contour to from a plurality of T-shirt bags. The bag-mouth contour forms a set of laterally spaced handles each having a receiving aperture for a conventional support rod of a dispensing rack, a central tab having a mounting aperture, and an open mouth region. The adhesion regions are optimally located below the receiving apertures and above the lowest point of the bag-mouth contour. Finally, slight pressure is applied to the proximate area of the adhesion regions of each bag in the bag pack to form a disengageable link between consecutive bags. The invention also relates to the T-shirt bags and the bag packs produced from this method.

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Livingston, NJ, United States of America

Peter Chen