Abstract: A process for dyeing a polyamide yarn or fabric, comprises the steps of: 1) polymerizing a nylon precursor comprising equimolar amounts of an amino groups source and a carboxy groups source, in a mixture further comprising an alfa,omega diamine in an amount corresponding to less than 2% of the amino groups contributed by said amino groups source, and a catalyst, in an amount of less than 100 ppm phosphorus relatively to the nylon precursor, having a formula [R—HP(?O)—O]n-M or R—HP(?O)—OZ, wherein M is a metal preferably selected from the group consisting of sodium, potassium, calcium, barium, and lithium; R is selected from the group consisting of hydrogen, alkyl, cycloalkyl, aryl, and arylalkyl; n is a whole number corresponding to the valence of the metal; and Z is selected from the group consisting of hydrogen, alkyl, aryl, arylalkyl, and alkyl substituted ammonium cation, with the proviso that R and Z are not simultaneously hydrogen; and R and Z being alkylene when joined to form a ring structure; eventua

Abstract: The present invention provides a polyamide (preferably Nylon 66) yarn for weaving or knitting clothes articles which have a cooling effect on the skin of the wearer. The yarn contains an inorganic additive (preferably Titanium dioxide) in an amount of between 0.3 and 3.0 wt % and is characterized by a low crimp modulus and a flat cross section.

Abstract: The invention provides a polyamide yarn and fabric for making clothes articles which have deodorizing effect and which enhance warming and drying on the skin of the wearer.

Abstract: The present invention provides a sparkling dyed double covered yarn comprising: (i) a core yarn; (ii) a first sheath yarn made of a bright polyamide yarn wound around the core yarn to form a single covered yarn; and (iii) a second sheath yarn made of a dyed polyamide yarn wound around said single covered yarn to form a double covered yarn; wherein the first sheath yarn and the second sheath yarn are wound in the same direction. The invention further provides processes for manufacturing a sparkling dyed double covered yarn and fabrics comprising the same.

Abstract: Provided is a process for manufacturing a polyamide yarn exhibiting good dyeability, while utilizing polyamide waste. The recycled polyamide yarn with a high waste polymer content is used for making quality articles by a low cost method, which is further friendly to the preservation of the environment.

Abstract: Provided is a process for manufacturing a polyamide yarn exhibiting good dyeability, while utilizing polyamide waste. The recycled polyamide yarn with a high waste polymer content is used for making quality articles by a low cost method, which is further friendly to the preservation of the environment.

Abstract: A polymeric matrix having improved flowability and wettability is provided, as well as a process for making it. The matrix contains a polyamide and a polyhydric alcohol which is chemically bonded at least to a part of the polyamide, and it is suitable particularly for manufacturing fiber-reinforced polyamide articles exhibiting a very good surface appearance and excellent mechanical properties.

Abstract: A process is provided for making a yarn with improved properties, such as lowered susceptibility to picks and snags. The yarn consists of a spandex core that is tightly covered with a nylon fiber, which tight covering is achieved by heat treatment. A knitted fabric is further provided, that is made of yarn consisting of a spandex core and a nylon fiber, which has low susceptibility to picks, as well as to tears during its production and its use.

Abstract: A process for the manufacturing of a differentially dyeable yarn includes the steps of: a) producing two polymers having a different concentration of amine end-groups; b) spinning yarns from said two polymers; and c) producing a yarn by intermingling said spun yarns made from said two polymers, in texturing, or draw twisting, or draw winding processes.