53results about How to "Increased access to polyester interior" patented technology

The invention relates to a porous super-bright trilobal profiled polyester fiber and a production method thereof. Modified polyester is spun by adopting a porous spinneret with the cross section shape of spinneret micro-pores being trilobal in order to produce the porous super-bright trilobal profiled polyester fiber; the spinneret micro-pores are arranged in the porous spinneret in an elliptical manner, the pore center of every spinneret micro-pore is positioned in a concentric ellipse, concentric ellipses are serial ellipses, the long axes of all the ellipses are collinear, and the short axes of all the ellipses are collinear. A preparation method of the modified polyester comprises the following steps: reacting terephthalic acid with ethylene glycol to prepare ethylene terephthalate, adding diol terephthalate prepared from terephthalic acid and branched chain-containing diol, and continuously reacting to obtain the modified polyester. The porous super-bright trilobal profiled polyester fiber produced in the invention has excellent performances, the liner density deviation ratio is not greater than 0.5%, the breaking strength CV value is not greater than 4.0%, the fracture elongation CV value is not greater than 8.0%, and the yarn unevenness CV value is not greater than 2.0%.

The invention relates to a differential shrinkage composite filament and a preparing method thereof. According to the invention, modified polyester employs a porous spinneret for spinning to prepare the differential shrinkage composite filament; an arrangement mode of the spinneret holes on the porous spinneret is in an elliptical shape, the aperture center of the spinneret holes is positioned on concentric ellipses, the concentric ellipses are a series of ellipses, the long shafts of all ellipses are collinear, and the short shafts are collinear. The differential shrinkage composite filament is subjected to plying and doubling by modified polyester POY filament and FDY filament, then is composited through network, and finally reeled. A preparation method of the modified polyester comprises the following steps: terephthalic acid and glycol are subjected to a reaction to prepare ethylene glycol terephthalate, terephthalic acid and branched chain-containing dihydric alcohol are subjected to a reaction to obtain terephthalic acid glycol ester, and continuous reacting is carried out on the material to obtain the product. The filament has excellent fiber performance, the linear density deviation ratio is less than or equal to 2.0%, a breaking tenacity CV value is less than or equal to 4.0%, a breaking elongation CV value is less than or equal to 8.0%, and a crimp contraction variation coefficient CV value is less than or equal to 8.0%.

The invention relates to porous PTT (polytrimethylene terephthalate)-fiber HOY (high oriented yarn) and a preparation method thereof. According to the preparation method, the porous PTT-fiber HOY is prepared from modified PTT by spinning with a porous spinneret; spinneret orifices in the porous spinneret are arranged in an oval shape, that is, the centers of the spinneret orifices are located on concentric ellipses adopting series ellipses, major axes of all the ellipses are collinear, and minor axes of all the ellipses are collinear. The porous PTT-fiber HOY is prepared from modified PTT through measurement, extrusion, cooling, oiling and winding. A preparation method of modified PTT comprises the steps as follows: terephthalic acid and 1,3-propanediol react, trimethylene terephthalate is prepared, diol terephthalate prepared from terephthalic acid and branched-chain-containing diol through a reaction is added, reaction is continued, and modified PTT is obtained. The prepared HOY has excellent fiber performance, the deviation rate of linear density is lower than or equal to 0.2%, the breaking strength CV value is lower than or equal to 2.5%, and the breaking elongation CV value is lower than or equal to 5.0%.

The invention relates to a porous soft polyester fiber FDY yarn and a preparing method thereof. According to the invention, modified polyester employs a porous spinneret for spinning to prepare the porous soft polyester fiber FDY yarn; an arrangement mode of the spinneret holes on the porous spinneret is in an elliptical shape, the aperture center of the spinneret holes is positioned on concentric ellipses, the concentric ellipses are a series of ellipses, the long shafts of all ellipses are collinear, and the short shafts are collinear. the porous soft polyester fiber FDY yarn is prepared by metering modified polyester slices, extruding, cooling, oiling, stretching, thermoforming and reeling the material. A preparation method of the modified polyester comprises the following steps: terephthalic acid and glycol are subjected to a reaction to prepare ethylene glycol terephthalate, terephthalic acid and branched chain-containing hexanediol are subjected to a reaction to obtain the terephthalic acid glycol ester, and continuous reacting is carried out on the material to obtain the product. The yarn has excellent fiber performance, the linear density deviation ratio is less than or equal to 0.5%, the breaking tenacity CV value is less than or equal to 4.0%, breaking elongation CV value is less than or equal to 8.0%, and a yarn unevenness CV value is less than or equal to 2.0.

The invention relates to porous PBT fiber DTY (drawn textured yarn) and a preparation method thereof. The porous PBT fiber DTY is prepared from modified PBT through spinning by a porous spinneret plate; spinneret holes in the porous spinneret plate are arranged in an ellipse, that is, the centers of the spinneret holes are located on concentric ellipses which are a series of ellipses, major axes of the ellipses are collinear, and minor axes of the ellipses are collinear. The porous PBT fiber DTY is prepared from the modified PBT through metering, extruding, cooling, oiling and winding; a preparation method of the modified PBT comprises the following steps: terephthalic acid and 1,4-butanediol react to prepare butanediol 1,4-terephthalate, terephthalic acid and diol containing branched chains are added for a reaction, diol terephthalate is prepared and continuously subjected to a reaction, and modified PBT is obtained. The prepared DTY has excellent performance, the linear density deviation is lower than or equal to 0.2%, the breaking strength CV value is smaller than or equal to 2.5%, and the breaking elongation CV value is smaller than or equal to 5.0%.

The invention relates to a porous flax-like polyester fiber and a preparation method thereof. The porous flax-like polyester fiber is prepared by spinning modified polyester by using a porous spinneret plate, wherein spinneret holes in the porous spinneret plate are elliptically arrayed; i.e., the centers of the spinneret holes are located on concentric ellipses which are series ellipses, the long axes of all the ellipses are collinear, and the short axes of all the ellipses are also collinear. The porous flax-like polyester fiber is prepared from modified polyester POY yarns and modified polyester FDY yarns through process. A preparation method for the modified polyester comprises the following steps: reacting terephthalic acid with glycol to prepare ethylene terephthalate; adding dihydric alcohol terephthalate prepared through reaction of terephthalic acid with propylene glycol containing a branched chain; and continuing reaction so as to obtain the modified polyester. The fiber prepared in the invention has following excellent properties: a linear density deviation ratio of no more than 2.0%, a breaking tenacity CV value of no more than 4.0%, a breaking elongation CV value of no more than 8.0%, and a crimp contraction variation coefficient CV value of no more than 8.0%.

The invention relates to super-soft wool-like porous polyester and a preparation method thereof. The super-soft wool-like porous polyester is prepared from modified polyester through spinning by a porous spinneret plate; spinneret holes in the porous spinneret plate are arranged elliptically, that is, the centers of the spinneret holes are located on concentric ellipses which are a series of ellipses, major axes of the ellipses are collinear, and minor axes of the ellipses are collinear. The super-soft wool-like porous polyester is prepared from modified polyester POY and modified polyester FDY through processing; a preparation method of the modified polyester comprises the following steps: terephthalic acid and ethylene glycol react to prepare ethylene glycol terephthalate, terephthalic acid and propylene glycol containing branched chains are added for a reaction, glycol terephthalate is prepared and continuously subjected to a reaction, and modified polyester is obtained. The prepared fiber has excellent performance, the linear density deviation is lower than or equal to 2.0%, the breaking strength CV value is lower than or equal to 4.0%, the breaking elongation CV value is lower than or equal to 8.0%, and the crimp contraction variation coefficient CV value is lower than or equal to 8.0%.

The invention relates to a modified polyester and a preparation method thereof. The modified polyester is composed of a terephthalic acid segment, a glycol segment, and a branch chain containing dihydric alcohol segment. The branch chain of the branch chain containing dihydric alcohol segment is positioned on one non-terminal carbon of the branch chain containing dihydric alcohol segment, is a straight carbon chain, and contains 5 to 10 carbon atoms. The preparation method comprises the following steps: carrying out esterification reactions between terephthalic acid and branch chain containing dihydric alcohol in the presence of concentrated sulfuric acid to obtain dihydric alcohol terephthalate; then carrying out esterification reactions between terephthalic acid and glycol to obtain ethylene terephthalate; stirring and mixing dihydric alcohol terephthalate and ethylene terephthalate, in the presence of a catalyst and a stabilizing agent, and carrying out condensation reactions in a low vacuum stage and a high vacuum stage to obtain modified polyester. The increased space between the gaps among molecular chains in polyester is far greater than that of branch chain free polyester at a same temperature, so small particles such as dye can more easily enter the interior of modified polyester, and the dyeing speed is increased.

The invention relates to a porous super-soft linen-like polyester fiber and a preparation method thereof. Modified polyester is spun by a porous spinneret plate to prepare the porous super-soft linen-like polyester fiber. The spinneret orifices in the spinneret plate are arranged in an oval shape. The center of the spinneret orifices is positioned on the center of concentric ellipses; the concentric ellipses are a series of ellipses, long axes of all ellipses are collinear, and moreover, short axes of all ellipses are collinear. The porous super-soft linen-like polyester fiber is prepared from modified polyester POY yarns and modified polyester FDY yarns. The modified polyester preparation method comprises the following steps: reacting terephthalic acid with glycol to obtain ethylene glycol terephthalate, reacting ethylene glycol terephthalate with added branch chain containing hexylene glycol to generate dihydric alcohol terephthalate, and keeping on reactions to obtain modified polyester. The prepared fiber has excellent performances: the linear density deviation ratio is not more than 2.0%, the breaking strength CV value is not more than 4.0%, the breaking elongation CV value is not more than 8.0%, and the crimp contraction variable coefficient CV value is not more than 8.0%.

The invention relates to porous superfine denier polyester fiber and a preparation method thereof. Modified polyester undergoes spinning by a porous spinneret plate to prepare porous superfine denier polyester fiber. The arrangement mode of spinneret orifices on the porous spinneret plate is elliptical arrangement. That is to say, the centers of the spinneret orifices are positioned at concentric ellipses which are series ellipses. Long axis of all the ellipses is collinear, and minor axis is collinear. The porous superfine denier polyester fiber is prepared by metering of modified polyester chip, extrusion, cooling, oiling, cooling, oiling and high-speed winding. A preparation method of modified polyester comprises the following steps: letting terephthalic acid and glycol react to prepare ethylene glycol terephthalate, adding terephthalic acid and propylene glycol containing branched chain and reacting to prepare terephthalic dibasic alcohol ester, and continuously reacting to obtain modified polyester. The prepared fiber has excellent properties. Deviation ratio of linear density is less than or equal to 0.5%; breaking strength CV value is less than or equal to 4.0%; breaking elongation CV value is less than or equal to 8.0%; and yarn unevenness CV value is less than or equal to 2.0%.

The invention relates to porous soft polyester fiber POY and a preparation method thereof. Modified polyester undergoes spinning by a porous spinneret plate to prepare porous soft polyester fiber POY. The arrangement mode of spinneret orifices on the porous spinneret plate is elliptical arrangement. That is to say, the centers of the spinneret orifices are positioned at concentric ellipses which are series ellipses. Long axis of all the ellipses is collinear, and minor axis is collinear. According to the porous soft polyester fiber POY, modified polyester undergoes grain-sized dicing to obtain modified polyester chip; and the modified polyester chip undergoes metering, extrusion, cooling, oiling and winding so as to prepare the product. A preparation method of the modified polyester comprises the following steps: letting terephthalic acid and glycol react to prepare ethylene glycol terephthalate, adding terephthalic acid and dihydric alcohol containing branched chain and reacting to prepare terephthalic dibasic alcohol ester, and continuously reacting to the modified polyester. The prepared fiber has excellent properties. Deviation ratio of linear density is less than or equal to 0.2%; breaking strength CV value is less than or equal to 2.5%; and breaking elongation CV value is less than or equal to 5.0%.

The invention relates to porous soft cottonlike polyester fiber and a preparation method thereof. Modified polyester undergoes spinning by a porous spinneret plate to prepare porous soft cottonlike polyester fiber. The arrangement mode of spinneret orifices on the porous spinneret plate is elliptical arrangement. That is to say, the centers of the spinneret orifices are positioned at concentric ellipses which are series ellipses. Long axis of all the ellipses is collinear, and minor axis is collinear. The porous soft cottonlike polyester fiber is prepared by processing of modified polyester POY and modified polyester FDY. A preparation method of the modified polyester comprises the following steps: letting terephthalic acid and glycol react to prepare ethylene glycol terephthalate, adding terephthalic acid and hexanediol containing branched chain and reacting to prepare terephthalic dibasic alcohol ester, and continuously reacting to modified polyester. The prepared fiber has excellent properties. Deviation ratio of linear density is less than or equal to 2.0%; breaking strength CV value is less than or equal to 4.0%; breaking elongation CV value is less than or equal to 8.0%; and variable coefficient CV value of crimp contraction is less than or equal to 8.0%.