Abstract: A slit extrusion die with a modified entry port which allows extrusion of a low denier tape at high draw down ratios is disclosed. The die has an entry port wherein the depth of the slit is greater at both ends than at the middle by an amount equal to 0.1 to 0.4 times the length of the slit.

Abstract: A low denier, high tenacity poly(ethylene terephthalate) fibrillated tape yarn particularly suited for conversion into a sewing thread which exhibits excellent sewing performance is produced by intimately mixing poly(ethylene terephthalate) polymer with from about 0.1 to 20 percent polypropylene based on the weight of poly(ethylene terephthalate), extruding the polymer mixture in the form of a tape through a slit die having a modified entry port wherein the depth of the slit is greater at both ends than at the middle, at a melt draw down of from about 26:1 to about 75:1, quenching said tape, hot drawing said tape in two stages wherein said tape is initially hot drawn to a draw ratio of from about 3.3 to about 4.2 while being subjected to a temperature of from about 80 to about 140 degree centigrade, thereafter hot drawing to a total draw ratio of about 5.0 while heated to a temperature about 160 degrees and thereafter subjecting the tape to fibrillation.

Abstract: A low denier, high tenacity poly(ethylene terephthalate) fibrillated tape yarn particularly suited for conversion into a sewing thread which exhibits excellent sewing performance is produced by intimately mixing poly(ethylene terephthalate) polymer with from about 0.1 to 20 percent polypropylene based on the weight of poly(ethylene terephthalate), extruding the polymer mixture in the form of a tape through a slit die having a modified entry port wherein the depth of the slit is greater at both ends than at the middle, at a melt draw down of from about 26:1 to about 75:1, quenching said tape, hot drawing said tape in two stages wherein said tape is initially hot drawn to a draw ratio of from about 3.3 to about 4.2 while being subjected to a temperature of from about 80.degree. to about 140.degree. centigrade, thereafter hot drawing to a total draw ratio of about 5.0 while heated to a temperature about 160.degree. and thereafter subjecting the tape to fibrillation.

Abstract: A method of forming stabilized polyacrylonitrile compositions which are particularly suited for the spinning of polyacrylonitrile fibers and films and the compositions produced thereby wherein acrylonitrile polymers containing at least 85 percent acrylonitrile are dissolved in a solvent which is acetonitrile or an acetonitrile -- water mixture and which contains as a color stabilizer a compound having the following general formula:X -- S -- Ywherein X is a monovalent organic radical which may be substituted or unsubstituted selected from the group consisting of alkyl, cycloalkyl, aryl, and combinations thereof; Y is either hydrogen or X; and the total number of carbon atoms contained in both X and Y is in the range of from about 4 to about 20. Preferably, the solvent and polymer are purged with nitrogen and the pH of the solvent is adjusted to about 6.0 - 7.0.

Abstract: Aromatic sulfonates and fiber and film forming polymers containing these sulfonates, the sulfonates being represented by the general formula: ##STR1## WHEREIN R.sub.1 represents either hydrogen or an alkyl radical containing from 1 to about 6 carbon atoms; n, n.sub.1, n.sub.2 and n.sub.3 each independently represent an integer from 0 to about 6, and n.sub.1 + n.sub.2 + n.sub.3 is equal to or greater than 2 if Y and Z both are hydroxy; Y and Z are selected independently from the class consisting of hydroxy, carboxy, and alkoxycarbonyl, the alkoxy portion of which contains from 1 to about 6 carbon atoms; Ar represents a divalent aromatic radical which may be substituted or unsubstituted; m is an integer equal to the valency of the metal; and R represents a divalent radical, with the proviso that where n is O and Ar is phenylene, the metal is lithium.

Abstract: A low denier, high tenacity poly(ethylene terephthalate) fibrillated tape yarn particularly suited for conversion into a sewing thread which exhibits excellent sewing performance is produced by intimately mixing poly(ethylene terephthalate) polymer with from about 0.1 to 20 percent polypropylene based on the weight of poly(ethylene terephthalate), extruding the polymer mixture in the form of a tape through a slit die having a modified entry port wherein the depth of the slit is greater at both ends than at the middle, at a melt draw down of from about 26:1 to about 75:1, quenching said tape, hot drawing said tape in two stages wherein said tape is initially hot drawn to a draw ratio of from about 3.3 to about 4.2 while being subjected to a temperature of from about 80.degree. to about 140.degree. C, thereafter hot drawing to a total draw ratio of about 5.0 while heated to a temperature about 160 degrees and thereafter subjecting the tape to fibrillation.

Abstract: An accessory attachable on a telephone receiver which keeps a record of the number of telephone calls that are made from the receiver; the accessory including a lever activated when the telephone dial is turned so to make additions on a counter mechanism either for local calls or long distance calls, and the accessory also including mechanism that prevents recording any telephone calls that are either a wrong number, an unanswered call or a call to a telephone operator requesting information, so that only calls are recorded which will appear on a person's bill at the end of the month.

Abstract: The present invention relates to: process and apparatus for feeding continuous filaments to a continuous multifilament structure utilizing tangentially converging fluid streams to forward the filaments; process and apparatus for detecting breakage of filaments utilizing a rotatable cylinder, or a gap in a three dimensional body, wherein breakage of the filament causes a measurable change in the pressure of fluid flowing to the cylinder or the gap; process and apparatus for the production of continuous multifilament structures wherein, upon breakage of a continuous filament, the breakage detector automatically activates a filament feeder to temporarily insert a substitute filament.

Abstract: A synthetic material adapted for use in smoking products which, upon combustion, yields a lower amount of smokestream components which may be deleterious to the smoker than does tobacco, while having an acceptable smouldering rate and taste is prepared by the combination of a combustible material, such as carboxymethyl cellulose with a portion of a filler material.