A breathable multilayer spun bonded polypropylene membrane having a coated pressure sensitive adhesive capable of allowing air and moisture vapor to pass through it. The adhesive is formed of a copolymer comprising a backbone of n-butyl acrylate, 2-ethylhexyl acrylate, and vinyl acetate which is mixed with a surfactant and emulsified to produce bubbles which form pores when the copolymer is set with about 80% to about 90% of the pore sizes ranging from about 200 microns to about 300 microns and a pore density in the cured pressure sensitive adhesive ranging from about 4200 per inch.sup.2 to about 4600 per inch.sup.2, said pores being uniformly distributed to form a flow path through adhesive.

External thermal insulation composite systems described herein include a concrete or masonry wall and a multilayer thermal insulation board disposed on the concrete or masonry wall. The multilayer thermal insulation board includes at least one closed cell foam layer comprising polyurethane and polyisocyanurate having an open cell volume of less than 20% by volume according to ASTM D 6226 and at least one open cell foam layer comprising polyurethane and polyisocyanurate having an open cell volume of greater than 80% by volume according to ASTM D 6226.

Composites comprising aerogel materials are generally described. Layered aerogel composites may be of great utility for a wide variety of applications including lightweight structures, ballistic panels, multilayer thermal and acoustic insulation, spacecraft reentry shielding, supercapacitors, batteries, acoustic insulation, and flexible garments. Layered aerogel composites may be prepared by combing layers of fiber-containing sheets and multisheet plies with aerogel materials. Composites comprising mechanically strong aerogels and reticulated aerogel structures are described. Various nanocomposite aerogel materials may be prepared to facilitate production of composites with desirable functions and properties. Layered aerogel composites and related aerogel materials described in the present disclosure have not been previously possible due to a lack of viable aerogel formulations, a lack of methods for adhering and joining aerogel materials to each other and other materials, and a lack of methods that enable combining of fibrous materials and aerogels into layered structures in the same material envelope. Aerogel composites described herein enable specific capabilities that have not been previously possible with aerogels or through other means, for example, the ability to efficiency slow impacts from bullets and other ballistic bodies using a lightweight (<2 g/cm.sup.3 density) material, bear load as structural members at a fraction of the weight of conventional technologies, or simultaneously serve as a structural or flexible material that stores electrical energy.

An exterior structural trim part for a vehicle, comprising at least an area comprising at least 3 layers superposed and laminated together to form a structural unit whereby the two outer layers are compressed and consolidated fibrous layers and with an inner layer situated in-between the two fibrous outer layers being an impervious polyester foam layer.

Composite panel, particularly for forming roof panels of cars and/or industrial vehicles, and method of manufacturing the composite panel, which composite panel includes a core of foamed material, at least one skin layer of nonwoven material, and at least one connecting layer between the core of foamed material and the skin layer of nonwoven material.

A breatheable multilayer spun bonded polypropylene membrane having a coated pressure sensitive adhesive capable of allowing air and moisture vapor to pass through it. The adhesive is formed of a copolymer comprising a backbone of n-butyl acrylate, 2-ethylhexyl acrylate, and vinyl acetate which is mixed with a surfactant and emulsified to produce bubbles which form pores when the copolymer is set with about 80% to about 90% of the pore sizes ranging from about 200 microns to about 300 microns and a pore density in the cured pressure sensitive adhesive ranging from about 4200 per inch.sup.2 to about 4600 per inch.sup.2, said pores being uniformly distributed to form a flow path through adhesive.