Abstract: Provided is a post-formation process for preparation of a highly permeable thin film composite membranes for reverse osmosis, particularly for use with brackish water at low energy conditions. The process includes contacting a polyamide discrimination layer of a TFC membrane with a solution containing an oxidizing agent to form a treated membrane, followed by contacting the treated membrane with a solution containing a reducing agent. The resulting membrane exhibits enhanced water flux while maintaining salt rejection. Also provided are reverse osmosis membranes prepared in accord with the method, and modules containing the highly permeable thin film composite membranes, and methods of purifying water using the membranes or modules.

Abstract: A spiral wound module in which the membrane sheet is heat and pressure treated to collapse at least some of the pores of the support layer. The treated membrane can then be folded along the heat and pressure treated area to form a crease. Once folded, the membrane sheet can be wound around a perforated inner tube along with a feed channel spacer and a permeate collection sheet. The wound module can then be enclosed into a hard shell with anti-telescoping devices at each end. By collapsing at least some of the pores in the support layer, the membrane becomes less permeable to fluid in the treated area. As such, there will be less or no leakage of unfiltered fluid passing through the fold line of the membrane sheet during operation of the wound module.

Abstract: Provided is a post-formation process for preparation of a highly permeable thin film composite membranes for reverse osmosis, particularly for use with brackish water at low energy conditions. The process includes contacting a polyamide discrimination layer of a TFC membrane with a solution containing an oxidizing agent to form a treated membrane, followed by contacting the treated membrane with a solution containing a reducing agent. The resulting membrane exhibits enhanced water flux while maintaining salt rejection. Also provided are reverse osmosis membranes prepared in accord with the method, and modules containing the highly permeable thin film composite membranes, and methods of purifying water using the membranes or modules.

Abstract: A spiral wound module in which the membrane sheet is heat and pressure treated to collapse at least some of the pores of the support layer. The treated membrane can then be folded along the heat and pressure treated area to form a crease. Once folded, the membrane sheet can be wound around a perforated inner tube along with a feed channel spacer and a permeate collection sheet. The wound module can then be enclosed into a hard shell with anti-telescoping devices at each end. By collapsing at least some of the pores in the support layer, the membrane becomes less permeable to fluid in the treated area. As such, there will be less or no leakage of unfiltered fluid passing through the fold line of the membrane sheet during operation of the wound module.

Abstract: The present invention relates to a multi-layer oriented shrink film comprising at least one skin layer comprising a polystyrene material and at least one core layer comprising a polyolefin layer. The films are preferably primarily oriented in either the machine or the cross direction. These films are ideally suited for use as a shrink label which can be applied either as a CD shrink sleeve or applied using a continuous roll process. The films ideally have an overall density of less than 1.0 g/cm3, to facilitate recycling efforts.

Abstract: An apparatus including a pocket that is at least partially defined by an elastomeric film, and a related method. The elastomeric film comprising a material that includes a styrene block copolymer, a polyolefin, a polyurethane, a polystyrene, an ethylene vinyl acetate copolymer, a processing oil, or mixtures thereof.

Abstract: The present invention relates to a multi-layer oriented shrink film comprising at least one skin layer comprising a polystyrene material and at least one core layer comprising a polyolefin layer. The films are preferably primarily oriented in either the machine or the cross direction. These films are ideally suited for use as a shrink label which can be applied either as a CD shrink sleeve or applied using a continuous roll process. The films ideally have an overall density of less than 1.0 g/cm3, to facilitate recycling efforts.

Abstract: Three-dimensional flexible adhesive film structures are described which exhibit tack on demand characteristics. The film is capable of showing minimal or no tack under normal handling conditions, but when pressed against a target surface, exhibits the desired adhesion.

Abstract: Three-dimensional flexible adhesive film structures are described which exhibit tack on demand characteristics. The film is capable of showing minimal or no tack under normal handling conditions, but when pressed against a target surface, exhibits the desired adhesion.