Abstract: Enhanced suffusion coated and laminated nylon fibers are described. The fibers are formed from a blend of an aliphatic nylon and a semiaromatic nylon that is subsequently suffused with carbon. The nylon blend demonstrates advantageous physical properties over typical nylons, and the carbon suffusion process unexpectedly improved these physical properties further.

Abstract: Polyamide resins including the reaction product of an intimate mixture of at least two monomers selected from HMDA and a diamine; and an organic diacid, wherein sebacic acid is present in the organic diacid in an amount of less than or equal to about 50 mol. %, and associated articles and methods are provided herein.

Abstract: A trimmer head having at least two pivoting line holders for holding multiple folded strips of trimming line is presented wherein said pivoting line holders are retained within said housing between said housing and said cover and extend upward through apertures in said cover, said line holders being capable of movement around a vertical axis of rotation, at least three embodiments are disclosed which provide a rounded landing for supporting the inner radius of a folded strip of trimming line, the rounded geometry of the landing prevents line stress and breakage, the various embodiments include a pivot post having two parallel straight through holes with a rounded vertical wall between the through holes, a single open passageway having a center metal post, and a single open passageway having a series of at least two metal pins through the center of the passageway.

Abstract: A trimmer line for use with a trimmer head of a rotary trimmer is provided, wherein the trimmer line comprises two substantially equal lengths of line connected to each other by one of their ends to form the trimmer line, the two substantially equal lengths of line being of different colors to indicate the middle of the trimmer line. Such a trimmer line allows to easier, or more at least more accurate, spooling of the trimmer line on a trimmer head.

Abstract: A trimmer head for a trimmer having a shaft defining a rotation axis is provided. The trimmer head includes a housing including a main housing and a lower cover, wherein the main housing contains a pair of opposed eyelets through which trimmer line is discharged. A spool is encased within the housing, with a bump knob connected thereto, and has a passageway with opposed ends and extending from one side of the spool to another, the opposed ends being alignable with the eyelets to receive the line. A first set of ramps is located on an inside surface of the main housing and a second set of ramps is located within a center barrel of the spool. The two sets of ramps interact to control the direction of releasing line from the trimmer head and forcing indexing of the spool when the bump knob is bumped.

Abstract: A novel monofilament trimmer line is provided for reducing noise, reducing air drag and increasing durability by having a non-round cross-sectional shape defined as a polygon with three to six sides wherein the vertices between adjacent sides have been replaced with generous circular arcs, the arcs of a parabola, or even other arc shapes so long as the arc is convex and contains no sharp edges and wherein each arc is tangent to the two adjacent sides with a smooth and continuous transition, and the sides of the polygon are either straight or slightly convex, but not concave.

Abstract: Medium and high molecular weight long chain aliphatic nylons and methods of making the same. A method of making medium and high molecular weight nylons is described, which not only produces consistent products, but products with enhanced properties such as impact resistance and chemical resistance.

Abstract: Powder compositions for laser sintering. Nylon copolymer compositions are described which provide enhanced performance in processing and finished products when used in 3D laser sintering processes.

Abstract: The disclosure relates to an improved method of producing MPMD based amorphous, semi-aromatic polyamides in order to improve their mechanical properties. It also relates to improved formulations of these polyamides which have further improved mechanical properties by the incorporation of greater amounts of isophthalic acid. The disclosure relates to an improved method of producing MPMD based amorphous, semi-aromatic polyamides in order to improve their mechanical properties. It also relates to improved formulations of these polyamides which have further improved mechanical properties by the incorporation of greater amounts of isophthalic acid.

Abstract: The disclosure relates to an improved method of producing MPMD based amorphous, semi-aromatic polyamides in order to improve their mechanical properties. It also relates to improved formulations of these polyamides which have further improved mechanical properties by the incorporation of greater amounts of isophthalic acid. The disclosure relates to an improved method of producing MPMD based amorphous, semi-aromatic polyamides in order to improve their mechanical properties. It also relates to improved formulations of these polyamides which have further improved mechanical properties by the incorporation of greater amounts of isophthalic acid.

Abstract: Polyamide resins including the reaction product of an intimate mixture of at least two monomers selected from HMDA and a diamine; and an organic diacid, wherein sebacic acid is present in the organic diacid in an amount of less than or equal to about 50 mol. %, and associated articles and methods are provided herein.

Abstract: A fixed-line trimmer head for a rotary trimmer device includes the upper portion having a periphery, wherein the upper portion has a plurality of openings spaced from the periphery; and a plurality of mechanisms. Each mechanism can hold a strip of line and includes a post portion disposed through one of the openings in the upper portion, and a flange disposed at one end of the post portion and sandwiched between the upper portion and lower portion of the trimmer head to prevent vertical movement of the mechanism. The post portion includes two line channels, each line channel defining a passageway to receive the same strip of line, wherein at least one of the line channels is curved such that any portion of the strip of line being received through the passageway of that line channel is bent at that portion of the strip of line away from the second line channel while passing through that at least one line channel that is curved.

Abstract: Nylon based filaments, yarns, and fabrics having improved properties are provided. A filament contains a composite material formed from a (i) a main structural component containing a mixture of one or more base nylons and one or more secondary nylons, and optionally (ii) an additive component mixed with the main structural component. The one or more base nylons may include one or more aliphatic nylons and the one or more secondary nylons may include one or more semiaromatic nylons.

Abstract: A trimmer head having at least two pivoting line holders for holding multiple folded strips of trimming line is presented wherein said pivoting line holders are retained within said housing between said housing and said cover and extend upward through apertures in said cover, said line holders being capable of movement around a vertical axis of rotation, at least three embodiments are disclosed which provide a rounded landing for supporting the inner radius of a folded strip of trimming line, the rounded geometry of the landing prevents line stress and breakage, the various embodiments include a pivot post having two parallel straight through holes with a rounded vertical wall between the through holes, a single open passageway having a center metal post, and a single open passageway having a series of at least two metal pins through the center of the passageway.

Abstract: A filament comprising a polymer blend and specific articles comprising the filament are disclosed. The polymer blend includes an aliphatic nylon and a semiaromatic nylon. The aliphatic nylon is the major component of the blend and semiaromatic nylon is the minor component of the blend. The aliphatic nylon can be Nylon 6, Nylon 66, Nylon 610, Nylon 612, Nylon 12, and mixtures thereof. The semiaromatic nylon can be 6I/6T, 6T/6I, and mixtures thereof. The nylon blend filament provides enhanced mechanical properties such as modulus, ultimate strength, and yield strength with improved processability and reduced diameter variability at a reduced cost.

Abstract: A trimmer head for a rotary cutting device that utilizes a plurality of trimmer line and cutting blades either separately or simultaneously, the blades pivotally connected to the trimmer head in a first plane which is generally parallel to and underneath a second plane in which the trimmer line is pivotally connected to the trimmer head, each of the blades and strips of trimmer line capable of pivoting within a lateral arc of at least 180 degrees within its respective plane without striking the trimmer head or any other blades or trimmer line.

Abstract: Nylon based filaments, yarns, and fabrics having improved properties are provided. A filament contains a composite material formed from a (i) a main structural component containing a mixture of one or more base nylons and one or more secondary nylons, and optionally (ii) an additive component mixed with the main structural component. The one or more base nylons may include one or more aliphatic nylons and the one or more secondary nylons may include one or more semiaromatic nylons.

Abstract: A fixed-line rotary trimmer head is provided having pivoting posts (line holding mechanisms) which allow folded strips of trimmer line to pivot out of the way when impacting stones, metal posts and the like to reduce wear and tear on the line and reduce line breakage, the trimmer line is loaded from the underside of the trimmer head and follows an approximate 90 degree curvilinear channel so that the distal ends of the line extend out the side of the trimmer head for use, the trimmer head also comprises means for pushing the trimmer line partially out of the channel for ease of use and for removal of unused trimmer line.

Abstract: Fixed-line trimmer heads for rotary trimmer devices and associated methods are provided. A fixed-line trimmer head for a rotary trimmer device includes a housing operatively attachable to the rotary trimmer device. The housing is rotatable when in use around a central axis of rotation and has a top surface extending outwardly from the central axis and facing upward when in use, a bottom surface extending outwardly from the central axis and facing the ground when in use, and a periphery connecting the top surface to the bottom surface. At least one line channel is defined within the housing of the trimmer head having an entrance recessed within the periphery and an exit disposed on one of the top and bottom surfaces, wherein the entrance and exit are each located an equal distance from the axis of rotation.

Abstract: Nylon based filaments, yarns, and fabrics having improved properties are provided. A filament contains a composite material formed from a (i) a main structural component containing a mixture of one or more base nylons and one or more secondary nylons, and optionally (ii) an additive component mixed with the main structural component. The one or more base nylons may include one or more aliphatic nylons and the one or more secondary nylons may include one or more semiaromatic nylons.