摘要:
In a case where the load is not smaller than the predetermined value, the positioning is not completed even when it is determined that the movable body is moved to the position supposed to be the target position, then the movable body is moved to a retry starting position different from the position supposed to be the target position, subsequently a retry operation is performed for moving the movable body from the retry starting position to the position supposed to be the target position, and consequently the positioning is completed when the load becomes smaller than the predetermined value after the retry operation is performed for a predetermined number of times.
摘要:
A polyester fiber is disclosed, comprising a polyester obtained by copolymerizing a third component with poly(trimethylene terephthalate) wherein the third component is an ester-forming sulfonate compound in a copolymerizing ratio of from 0.5 to 5 mol %, the fiber has a peak temperature of loss tangent of from 85 to 115° C., and the relationship between modulus Q (g/d) and elastic recovery R (%) of the fiber satisfies the following formula (1): 0.18≦Q/R≦0.45. This fiber can be dyed into a dark shade under atmospheric pressure and enables fast dyeing of a fabric using the fiber in composite with a stretch fiber represented by polyurethane elastic fiber or a fiber material having low heat resistance such as wool silk and acetate fiber. The composite fabric can be dyed under atmospheric pressure, therefore, the physical properties of fiber having low heat resistance used in combination is not impaired during the dyeing process. The polyester fiber of the present invention can be treated for caustic reduction, therefore, a fiber having highly soft and dry touch and dyeability into brilliant color can be obtained.
摘要:
A polyester resin composition is disclosed, comprising poly(trimethylene terephthalate) in a proportion of 90 wt % or more, wherein the resin composition has an intrinsic viscosity of from 0.4 to 2 and contains a phosphorus compound corresponding to from 10 to 250 ppm in terms of the amount of phosphorus element, a cyclic dimer in an amount of not exceeding 3 wt % and a bis(3-hydroxypropyl)ether in an amount of 2 wt % or less. This polyester resin composition has excellent spinning stability and high melt stability and is used for the production of a poly(trimethylene terephthalate)-based fiber having excellent whiteness and high tenacity.
摘要:
The present invention provides a method of producing polyalkylene terephthalate, which comprises: introducing a prepolymer of polyalkylene terephthalate that is in a molten state comprising 70 mol % or more of ethylene terephthalate or 1,4-butylene terephthalate repeating units and having an intrinsic viscosity [η] between 0.2 and 2 dl/g through a feed opening to a polymerization reactor; discharging the introduced prepolymer from holes of a perforated plate; and polymerizing the prepolymer under reduced pressure, while allowing the prepolymer to fall along the surface of a support that is open towards the outside at a temperature between the [crystalline melting point−10° C.] of the prepolymer or higher and the [crystalline melting point+30° C.] of the prepolymer or lower under the conditions represented by a formula S1/S2>1, wherein S1 is the surface area of falling polyalkylene terephthalate, and S2 is the area where the support is in contact with polyalkylene terephthalate.
摘要:
A PTT-based composition is provided such that the emission of hazardous acrolein formed during heat oxidation is suppressed and the deterioration of color is reduced, and a process for producing the same. The PTT-based composition comprises PTT, a compound having a phenolic hydroxy group (a) and a compound having a secondary amine structure (b), or comprises PTT and a compound having both a phenolic hydroxy group (a) and a secondary amine structure (b), and/or modified derivatives of these compounds.
摘要:
An ester-forming monomer obtained by depolymerization of polytrimethylene terephthalate and having an acrolein content of no greater than 0.5 wt %. Polymers obtained using the monomer and fibers, films and molded articles comprising the polymers. The ester-forming monomer is obtained by reacting polytrimethylene terephthalate with at least one compound selected from among monoalcohols, 1,3-propanediol and water in the presence of a basic substance. When the recovered ester-forming monomer is used as the starting material for production of a polymer, it is possible to produce a molding polymer for fibers, films and the like with quality equivalent to or higher than that obtained using virgin monomer.
摘要:
A process for producing a polyester fiber by melt spinning a polyester having at least 90% or more by weight of poly(trimethylene terphthalate), the process including rapidly cooling to solidify molten filaments extruded from a spinning nozzle, winding the solidified filaments around a first roll heated at from 30 to 80° C. and having a peripheral speed of from 300 to 3,500 in/mm without the filaments being wound thereon, delivering the filaments to a second roll heated at from 100 to 160° C. to be wound around its peripheral surface, whereby the filaments are drawn at a draw ratio of 1.3 to 4 between the first roll and the second roll having a peripheral speed higher than that of the first roll, and subsequently winding the filaments on a take-up winder having a peripheral speed lower than that of the second roll.
摘要:
In a case where the load is not smaller than the predetermined value, the positioning is not completed even when it is determined that the movable body is moved to the position supposed to be the target position, then the movable body is moved to a retry starting position different from the position supposed to be the target position, subsequently a retry operation is performed for moving the movable body from the retry starting position to the position supposed to be the target position, and consequently the positioning is completed when the load becomes smaller than the predetermined value after the retry operation is performed for a predetermined number of times.
摘要:
A polytrimethylene terephthalate resin comprising: 90 to 100 mole % of trimethylene terephthalate recurring units, and 0 to 10 mole % of at least one monomer unit obtained from a comonomer other than the monomers used for forming the recurring units and copolymerizable with at least one of the monomers used for forming the recurring units, which resin has the following characteristics: (A) an intrinsic viscosity [η] of from 0.8 to 4.0 dl/g; (B) an Mw/Mn of from 2.0 to 2.7; (C) a psychometric lightness L-value (L-1) of from 70 to 100 and a psychometric chroma b*-value (b*-1) of from −5 to 25; and (D) a psychometric lightness L-value (L-2) of from 70 to 100 and a psychometric chroma b*-value (b*-2) of from −5 to 25 as measured after heating the resin at 180° C. for 24 hours in air.