An embodiment of the present invention provides a polyolefin microporous membrane, including: a first porous layer containing a polyolefin and having a structure including a first rod-shaped crystal extending in one direction and plural first plate-shaped crystals arranged in a separated state and intersecting the first rod-shaped crystal, and a second porous layer containing a polyolefin and having a structure including a second rod-shaped crystal extending in another direction intersecting the one direction and plural second plate-shaped crystals arranged in a separated state and intersecting the second rod-shaped crystal.

A cast piece cooling method, a gel sheet, a multilayer microporous polyethylene separator, and a preparation method are provided. The cast piece cooling method includes: changing an opening degree of a die head so that a molten material flowing out of the die head is an arc-shaped molten material; calendering a cast piece so that the arc-shaped molten material passes vertically through a gap between a first casting roller and a pinch roller to form a calendered cast piece; and gradually cooling, so that the calendered cast piece is guided and transported along surfaces of other casting rollers to the last casting roller, and cooling the calendered cast piece, to obtain a gel sheet.

Compound padding having comfort layer and providing good support is revealed. The compound padding includes a support layer and at least one comfort layer. The support layer is a foam layer made of low-density melamine resin foam with certain support while the comfort layer is a foam layer made of hydrophilic polyurethane foam and attached to at least one surface of the support layer by an adhesive layer. Thereby the compound padding can provide effective support to user's body by the support layer and gives a good feeling and a sense of comfort to users by the comfort layer when users' skin is in contact with the compound padding. The compound padding has the advantages of low density, light weight and reduced cost.

The present invention relates to multi-layer fiber products and a method of manufacturing these kinds of products. The present product comprises a first layer consists mainly of natural fibers and a second, heat-sealing layer located on top of the first layer. The heat-sealing layer consists mainly of synthetic thermoplastic fibers or particles. According to the present method, the heat-sealing layer is brought onto the first layer already during the web forming process, the first and the second layers being formed and joined together in a foam forming process. With the present invention, it is possible to decrease the amount of plastic materials in packaging materials having heat-sealing properties.

Coextruded polymeric layer having first and second opposed major surfaces, the coextruded polymeric layer comprising foam and the coextruded polymeric layer comprising features extending from or into the first major surface by at least 100 micrometers, the first major surface comprising a first material having a first percent elongation at break, the second major surface comprising a second material having a second percent elongation at break, wherein the first percent elongation at break is greater than 100 percent of the second percent elongation at break. Coextended polymeric layers described herein are useful, for example, in vibration damping applications (e.g., a vibration damping laminate comprising a kinetic spacer comprising the coextruded polymeric layers).

The present invention provides a solar absorber incorporated bilayer foam solar evaporator for seawater and wastewater purification including a plurality of solar absorbers partially incorporated into a porous polymer framework and partially forming a thermal insulation layer proximal to solar irradiation. In particular, low-cost commercially available B.sub.4C powders are embedded into a porous polymer foam in a one-pot method to form a scaffold of boron carbide bilayer foam (BCBF) with good hydrophilic wettability, heat-shielding, and solar-thermal conversion. The boron carbide bilayer foam (BCBF) of the present invention enables a high cost-performance seawater desalination and wastewater purification at a high evaporation rate of 2.8 kg/m.sup.2/h with 93% solar evaporation efficiency under 1 sun illumination (or 1 kW/m.sup.2). The present invention thereby provides an excellent and cost-effective solar evaporator tool for industrial-level water purification. Following the present method to prepare the BCBF solar evaporator, the fabrication cost can be as low as 3.6 $/m.sup.2.

A back panel of a motor vehicle seat element includes at least a first foam layer with at least two areas of different stiffness.

A process for forming multi-layer fibrous web with good absorbent capacity and absorbent rate is disclosed. The multi-layer fibrous web can be used as absorbent articles, including wiping products, such as industrial wipers, food service wipers, and the like. The multi-layer fibrous web includes a first layer and a second layer, as well as a crossover zone, that has a capillary pressure between the capillary pressure of the first layer and the capillary pressure of the second layer.

Unified multilayer articles comprising alternating layers including: a) at least two elastomeric foam interior layers, which are interior layers of the unified multilayer article, and which comprise: i) a first elastomeric material, and distributed therein: ii) expanded polymeric microspheres; where the elastomeric foam interior layers alternate with: b) at least two alternate layers directly bound to adjacent elastomeric foam interior layers; and wherein at least one of the alternate layers is an interior layer of the unified multilayer article. Adhesive films comprising the unified multilayer articles of the present disclosure are also provided, which additionally comprises at least one pressure sensitive adhesive attachment layer, which is an outermost PSA layer directly bound to a first face of the unified multilayer article and available for attachment of the adhesive film to an adherend.

The present invention provides a structure that improves sound absorption coefficient. The present invention provides a structure comprising: a foam resin layer formed of a foam material having a foaming ratio of 1.1 to 8 times; and a sound absorbing layer formed of a foam material having a foaming ratio of 10 to 30 times, the sound absorbing layer laminated on the foam resin layer.