摘要:
A heat treatment operation can be executed, suppressing a wave-shaped deformation at a non heat-treatment region of an article to be heat treated.To an elongated-shaped article to be heat treated to which a raised portion extending in the longitudinal direction is formed, a hardening region, as a heat-treated region defined to extend in a longitudinal direction at a part of the raised portion, and a non-hardening region, as a non-heat-treated region defined to extend in the longitudinal direction at flange portion, and other parts of the raised portion are arranged side by side in a width direction orthogonal to the longitudinal direction. The flange portion is clamped by a first and a second clamp, arranged in the longitudinal direction, and one first clamp is a tight clamp for holding fixedly the flange portion and a plurality of second clamps are loose clamps for clamping loosely the flange portion, allowing the article to be heat treated to be convex on the side of the heated hardening region.
摘要:
A heat treatment operation can be executed, suppressing a wave-shaped deformation at a non heat-treatment region of an article to be heat treated. To an elongated-shaped article to be heat treated (10) to which a raised portion (11) extending in the longitudinal direction is formed, a hardening region as being a heat-treated region defined to be extended in a longitudinal direction at a part of the raised portion (11) and a non-hardening region as being non heat-treated region defined to be extended in the longitudinal direction at flange portion (13) and other parts of the raised portion (11) are arranged side by side in a width direction orthogonal to the longitudinal direction. The flange portion (13) is clamped by a first and a second clamping means (22), (23) arranged in the longitudinal direction, and one first clamping means (22) is a tight clamping means holding fixedly the flange portion (13) and a plurality of second clamping means (23) are loose clamping means clamping loosely the flange portion (13), allowing the article to be heat treated (10) to be convex on the side of the heated hardening region.
摘要:
A polymer of a kind different from a polyester in an amount within the range of 0.3 to 5.0% by weight based on the polyester is added to the polyester, and the resulting composition is melt-extruded from the same pack. The extruded filament group including polyester multi-filaments is cooled once to the glass transition temperature or below, and the filament group is subsequently divided into two groups. One of the filament groups in an opened state is subjected to non-contact heat treatment at an atmospheric temperature of 120° C. or above; however, the other filament group is kept in a state without being subjected to the heat treatment. The respective filament groups are then simultaneously taken off at a speed of 2500 m/min or above and subjected to doubling and mixing of the filaments.
摘要:
Polyester fibers having a deformed section are produced from a polyester polymer which is obtained by polycondensing an aromatic dicarboxylate ester in the presence of a catalyst containing a mixture of a Ti component (A) comprising at least one a titanium alkoxide or a reaction product thereof with a specific carboxylic acid or its anhydride with a P compound component (B) represented by the following general formula (III) and/or a reaction product of a Ti compound component (C) with a P compound component (D) represented by the following general formula (IV). The obtained fibers have a favorable color tone and excellent qualities without showing fluffing.
摘要:
Polyester fibers having an individual fiber thickness of 0.1 to 10 dtex are produced from a polyester polymer produced by polycondensing an aromatic dicarboxylate ester in the presence of a catalyst including a mixture of a Ti compound component (A) including at least one member selected from titanium alkoxides and reaction products of the titanium alkoxides with a specific type of carboxylic acids or anhydrides thereof, with a specific P compound component (B), and/or a reaction product of a Ti compound component (C) with a specific P compound component (D). The resultant fibers have a good color tone (a low b value) a stable drawing and false-twisting processability and exhibit excellent appearance and performance.
摘要:
A polyester combined filament yarn composed of a self-extending polyester multifilament yarn A and a heat-shrinkable polyester multifilament yarn B, wherein the polyester multifilament yarn A comprises a core portion and a plurality of fin portions protruding in a radial fashion from the core portion along the lengthwise direction of the core portion, and the following conditions (a) to (c) arc simultaneously satisfied. 1/20≦SB/SA≦⅓ (a) 0.6≦LB/DA≦3.0 (b) WB/DA≦¼ (c) (where SA represents the cross-sectional area of the core portion, DA represents the diameter of the core portion when the cross-section is a circle and the circumscribed circle diameter when it is not a circle, and SB, LB and WB represent the cross-sectional area, maximum length and maximum width, respectively, of the fin portions.)
摘要:
A polyester false-twist textured yarn, useful as a yarn for woven or knitted fabrics having excellent water-absorbing and quick drying properties, satisfies all of the requirements (1) to (3) shown below: (1) the cross-sectional profiles of a plurality of individual filaments, from which the false-twist textured multifilament yarn is constituted, each have 3 to 6 concavities, and the average number of the concavities having a ratio (H/W) of a largest depth (H) to a largest width (W) of the individual concavities of 0.3 or more is in the range of from 50 to 80% of the total number of the concavities; (2) the average of the cross-sectional profile flatness factors is in the range of from 1.5 to 3.5; and (3) the standard deviation of the cross-sectional profile flatness factors is in the range of from 0.3 to 1.0.
摘要:
There are provided a process for producing a polyester fine multifilament yarn having a single filament fineness of 0.9 dtex or below, a total number of single filaments of 100 to 400 and a birefringence of 0.03 to 0.06 comprising passing polymer streams of a polyester polymer melt extruded from a spinneret surface through an atmosphere wherein a distance of 0 to 40 mm from the spinneret surface is regulated to a temperature within the range of 100 to 300° C., further cooling the polymer streams and then converging the cooled filaments into a filament bundle at a position of 350 to 500 mm from the spinneret surface; a process for producing a polyester fine false twist textured yarn comprising subjecting a polyester fine multifilament yarn having a single filament fineness of 0.9 dtex or below, a total number of single filaments of 100 to 400 and a bifringence of 0.03 to 0.06 to false twist texturing, the process comprising subjecting the multifilament yarn to air interlacing so as to provide a degree of interlacing of 50 to 90 interlaced spots/m measured for the false twist textured yarn, regulating the residence time in a draw-false twisting heater of 0.052 to 0.300 second and the temperature of the running filament yarn at the outlet of the heater to a higher temperature than the glass transition temperature (Tg) of the polyester polymer by 90 to 140° C., subjecting the multifilament yarn to simultaneous draw-false twist texturing at a draw ratio of 1.40 to 1.70 times, providing the false twist textured yarn, applying a finish oil in an amount of 1.3 to 3.0% by weight based on the weight of the false twist textured yarn and winding the resulting yarn under a winding tension of 0.05 to 0.30 cN/dtex at a speed of 500 to 1200 m/min; and a process for producing the polyester fine false twist textured yarn having a single filament fineness of 0.9 dtex or below, a total number of single filaments of 100 and 400 and a birefringence of 0.03 to 0.06 comprising subjecting a polyester multifilament yarn to the simultaneous draw-false twisting and producing the false twist textured yarn, the process comprising the polyester fine multifilament yarn to air interlacing treatment before and after the simultaneous draw-false twist texturing and regulating the degree of interlacing before and after the latter air interlacing treatment to 30 to 60 interlaced spots/m and 70 to 110 interlaced spots/m, respectively.
摘要:
High-quality differential-shrinkage polyester combined filament yarn having good color tone and being free from fluffing can be made from a polyester polymer produced by using a catalyst comprising (I) a mixture consisting of a Ti compound component composed of one or more members selected from among titanium alkoxides of the general formula (I) and products of reaction of these alkoxides with carboxylic acids of the general formula (II) or anhydrides thereof and a P compound component consisting of a compound of the general formula (III) and/or (2) a product obtained by reacting a Ti compound component composed of one or more members selected from among titanium alkoxides of the general formula (I) and products of reaction of these alkoxides with carboxylic acids of the general formula (II) or anhydrides thereof with a P compound component consisting of a compound of the general formula (IV).
摘要:
There are provided a process for producing a polyester fine multifilament yarn having a single filament fineness of 0.9 dtex or below, a total number of single filaments of 100 to 400 and a birefringence of 0.03 to 0.06 comprising passing polymer streams of a polyester polymer melt extruded from a spinneret surface through an atmosphere wherein a distance of 0 to 40 mm from the spinneret surface is regulated to a temperature within the range of 100 to 300° C., further cooling the polymer streams and then converging the cooled filaments into a filament bundle at a position of 350 to 500 mm from the spinneret surface; a process for producing a polyester fine false twist textured yarn comprising subjecting a polyester fine multifilament yarn having a single filament fineness of 0.9 dtex or below, a total number of single filaments of 100 to 400 and a bifringence of 0.03 to 0.06 to false twist texturing, the process comprising subjecting the multifilament yarn to air interlacing so as to provide a degree of interlacing of 50 to 90 interlaced spots/m measured for the false twist textured yarn, regulating the residence time in a draw-false twisting heater of 0.052 to 0.300 second and the temperature of the running filament yarn at the outlet of the heater to a higher temperature than the glass transition temperature (Tg) of the polyester polymer by 90 to 140° C., subjecting the multifilament yarn to simultaneous draw-false twist texturing at a draw ratio of 1.40 to 1.70 times, providing the false twist textured yarn, applying a finish oil in an amount of 1.3 to 3.0% by weight based on the weight of the false twist textured yarn and winding the resulting yarn under a winding tension of 0.05 to 0.30 cN/dtex at a speed of 500 to 1200 m/min; and a process for producing the polyester fine false twist textured yarn having a single filament fineness of 0.9 dtex or below, a total number of single filaments of 100 and 400 and a birefringence of 0.03 to 0.06 comprising subjecting a polyester multifilament yarn to the simultaneous draw-false twisting and producing the false twist textured yarn, the process comprising the polyester fine multifilament yarn to air interlacing treatment before and after the simultaneous draw-false twist texturing and regulating the degree of interlacing before and after the latter air interlacing treatment to 30 to 60 interlaced spots/m and 70 to 110 interlaced spots/m, respectively.