Abstract: A spun-blown non-woven web is disclosed which is formed from a plurality of fibers formed from a single polymer having an average fiber diameter ranging from between about 0.5 microns to about 50 microns; a basis weight of at least about 0.5 gsm; a tensile strength, measured in a machine direction, ranging from between about 20 g to about 4,200 g; a ratio of tensile strength, measured in the machine direction, to basis weight of at least about 20:1; and a ratio of percent elongation, measured in the machine direction, to fiber diameter of at least about 15.

Abstract: A high loft, nonwoven web is disclosed having a three dimensional structure with fibers oriented in the x, y and z directions. The web has a fiber size distribution of from 0 ?m to about 15 ?m with at least about 25% of the fibers being above 4 ?m. The web has a thickness of less than about 250 millimeters and a basis weight ranging from about 20 g/m2 to about 3,000 g/m2. The web also has a vertical cross-section, when taken parallel to a machine direction, exhibiting a plurality of snugly stacked, approximately V, U or C-shaped structures, with each V, U or C-shaped structure having an apex facing in the machine direction. The web further has a recovery value ranging from about 20% to about 99% after being compressed under a pressure of 0.25 psi for a time period of 30 minutes.

Abstract: A process for forming a high loft, nonwoven web is disclosed. The process includes introducing a single molten polymer to a die having a plurality of nozzles. Emitting the molten polymer through the nozzles to form a plurality of filaments. Using air streams to facilitate movement and drawing of the filaments. Directing the filaments, which are transformed into fibers, towards a pair of heated moving surfaces. The pair of heated moving surfaces forming a convergent passage having an entry and an exit. Depositing the fibers into the entry of the convergent passage and routing the fibers between the pair of heated moving surfaces in a machine direction to form a high loft, non-woven web. The web having a fiber size distribution of from 0 ?m to about 15 ?m with at least about 25% of the fibers being above 4 ?m.

Abstract: A hybrid non-woven web is disclosed which is a matrix of a stream of fibers of a first material joined to streams of first and second spun-blown fibers. Each of the first and second spun-blown fibers are formed from a thermoplastic composition that contains at least one polymer having a melt flow rate of from between about 5 grams/10 minutes to about 6,000 grams/10 minutes at 230° C. Each of the first and second spun-blown fibers also have an average diameter of between about 1 microns to 10 microns and a standard deviation of from between about 0.9 microns to about 5 microns. In addition, the hybrid non-woven web has a tensile strength of at least about 5 gf/gsm/cm width, measured in a machine direction. An apparatus and a method of forming the hybrid non-woven web are also disclosed.

Abstract: A spun-blown non-woven web is disclosed which is formed from a plurality of fibers formed from a single polymer having an average fiber diameter ranging from between about 0.5 microns to about 50 microns; a basis weight of at least about 0.5 gsm; a tensile strength, measured in a machine direction, ranging from between about 20 g to about 4,200 g; a ratio of tensile strength, measured in the machine direction, to basis weight of at least about 20:1; and a ratio of percent elongation, measured in the machine direction, to fiber diameter of at least about 15.

Abstract: This invention relates to a process of melt blowing a cellulose solution through a concentric melt blown die with multiple rows of spinning nozzles to form cellulosic microfiber webs with different web structures.

Abstract: Disclosed is a novel melt blown spinnerette and process for making bicomponent fine fibers whereby a spinning nozzle fed by one type of polymer from one chamber is located inside another larger spinning nozzle fed by a second chamber, said nozzle pairs being arranged in multiple rows of spinning orifices, and directing high speed streams of gas to each row of spinning orifices. The design of having a nozzle inside a nozzle does not require laminar flow of layered molten masses of different polymers. The fibers made hereby have a broad fiber size distribution.

Abstract: An apparatus and process for extruding fiberforming thermoplastic polymers through spinning nozzles arranged in multiple rows are forming a non-woven web of high strength fibers. The molten fibers are accelerated by expanding hot gas flowing parallel to the extrusion nozzles and the fibers to a first velocity and cooled below their melting point, and subsequently accelerated to a higher velocity by an air jet fed with compressed cold air. The resulting fibers have a high degree of molecular orientation and tenacity and are collected on a moving collecting surface as a non-woven web.

Abstract: There is disclosed a novel apparatus and process for melt-blowing fiberforming thermoplastic polymers at high rates to form high-loft, low density fine fiber webs suitable for insulation applications. The high rates are achieved by mounting melt-blowing spinnerettes on the surfaces of a polygonal cylinder and spinning fibers in a radial fashion, then deflecting the fiber streams 90 degrees by a secondary stream of cold air.

Abstract: There is disclosed a process and apparatus for melt blowing at an initial velocity of from 500 to 1000 feet per second a molten thermoplastic condensation polymer at a temperature less than 50.degree. C. above the melting point thereof to form fibers of high molecular orientation, and collecting the fibers to form a non-woven web. In one aspect of the present invention, the fibers are collected on a rotating mandrel and heat treated during collection or subsequent of collection.

Abstract: There is disclosed a process and apparatus for melt blowing at an initial velocity of from 500 to 1000 feet per second a molten thermoplastic condensation polymer at a temperature less than 50.degree. C. above the melting point thereof to form fibers of high molecular orientation, and collecting the fibers to form a non-woven web. In one aspect of the present invention, the fibers are collected on a rotating mandrel and heat treated during collection or subsequent to collection.

Abstract: There is described a process for producing a novel porous fabric having at least 100,000 surface perforations per square inch by the biaxial stretching at ambient temperatures of a sheet of a composite fiber-film substrate formed by hot calendaring, inter alia, a laminate of a woven or non-woven web of fibers having a residual elongation of at least 40% and a synthetic polymeric film material constituting at least 20% by volume of the composite fiber-film substrate. Stretching of the composite fiber-film substrate is effected by passage through interdigitating grooved rollers having grooves spaced at a distance of less than one millimeter times the web basis weight in grams per square meter with concomitant control of the velocity of introduction of the composite fiber-film substrate into the nip of the grooved rollers to substantially the identical surface velocity of the grooved rollers.

Abstract: There is disclosed a novel groove roller and roller assembly comprised of two of such grooved rollers wherein the grooved roller is comprised of a plurality of discs having varying diameters and positioned on a shaft thereby forming a grooved roller of self-centering groove components. In a preferred embodiment, discs of one diameter and discs of another diameter are alternately mounted on the shaft. Also disclosed is a roller assembly formed of two of such grooved rollers in interdigitating or intermeshing relationship for laterally stretching incremental portions of an orientable thermoplastic substrate by introducing such substrate into a nip formed by such interdigitating grooved rollers whereby the velocity of introduction thereof is controlled to substantially the rotational velocity of such grooved rollers.

Abstract: There is described in a preferred embodiment of the present invention, a process and apparatus for bi-axially stretching a non-woven web of synthetic fibers in a first and second station wherein the first and second stations are provided with sets of rolls having grooves parallel and perpendicular, respectively, to the axis of each set of rolls. The groove pattern of the rolls is generally a sinosoidal wave with distances between grooves of less than 1.0 millimeters times the web basis weight in grams per square meter.

Abstract: There is described a process for bi-axially stretching a tubularly-formed sheet of thermoplastic material in first and second stations wherein the first and second stations are provided with sets of rolls having generally sinosoidally-shaped grooves perpendicular and parallel, respectively, to the axis of each set of rolls to produce bags of improved strip tensile breaking strength.

Abstract: A non-woven web of synthetic fibers is selectively stretched in incremental portions in a first and second station wherein the first and second station are provided with sets of rolls having grooves parallel and perpendicular, respectively, to the axis of each set of rolls to form a bi-axially stretched web. One groove pattern of the rolls is generally a sinosoidal wave with distances between grooves being less than 1.0 millimeters times the web basis weight in grams per square meter.

Abstract: There is disclosed a novel process and apparatus for selectively stretching incremental portions of a film of material comprised of a blend of a thermoplastic orientable polymer and an incompatible second phase selected from the group consisting of an incompatible polymer or inorganic material or a polymer matrix having an inorganic filler. The film is introduced into the nip of interdigitating rollers with the concomitant controlling of the velocity of film introduction to substantially the identical velocity of the surface velocity of the rollers to form an opaque, low density, microporous film or sheet of material.

Abstract: There is described in a preferred embodiment of the present invention, a process and apparatus for bi-axially stretching a tubularly-formed sheet of thermoplastic material in a first station and a plurality of second stations wherein the first and second stations are provided with sets of rolls having generally sinosoidally-shaped grooves perpendicular and parallel, respectively, to the axis of each set of rolls to produce bags of improved strip tensile breaking length.

Abstract: There is disclosed a novel process and product produced thereby for the selective stretching of incremental portions of a substrate of a synthetic thermoplastic material selected from the group consisting of a thermoplastic orientable polymer or a blend of a thermoplastic orientable copolymer in which there is admixed an incompatible second phase selected the group consisting of an incompatible polymer or inorganic material. The substrate is stretched in grooved roller pairs by controlling the velocity of introduction of the substrate to maintain the velocity substantially identical to the surface velocity of the roller pair. Stretching of the blends produce an opaque, low density porous sheet.

Abstract: There is disclosed a compound having the following structural formula: ##STR1## WHEREIN X, Y, and Z each being selected from the group consisting of ##STR2## wherein one of R.sub.1 and R.sub.2 is hydrogen and the other is an alkyl group having from 1 to 6 carbon atoms with the alkyl to hydrogen mole ratio being less than 0.4 and X being an integer of at least 1 and R.sub.3 is a diradical selected for the group consisting ofR.sub.3 is a diradical of either:(a) 1 to 6 methylene groups(b) a diradical of: --CH.dbd.CH--(c) a diradical of: ##STR3## where R.sub.1, R.sub.