An apparatus for continuously making a spunbond web of filaments comprises a spinneret, a cooling chamber into which process air for can be introduced for the purpose of cooling the filaments, a monomer suction device between a spinneret and cooling chamber, a stretcher and a deposition device for depositing the filaments of the spunbond web. The cooling chamber is divided into two cooling compartments, and process air can be suctioned out from a first upper cooling compartment at a volumetric flow rate (V.sub.M) to a monomer suction device. Process air exits from the first upper cooling compartment at a volumetric flow rate (V.sub.1) into a second lower cooling compartment and from the first upper cooling compartment at a volumetric flow rate (V.sub.1) into a second lower cooling compartment. A ratio (V.sub.M/V.sub.1) is 0.1 to 0.35.

A type of fully dull polyester drawn yarns and a preparing method thereof are disclosed. The preparing method is to melt spinning a modified polyester with the fully drawn yarn (FDY) technique, and the modified polyester is a product of an esterification and successive polycondensation reactions of evenly mixed terephthalic acid, ethylene glycol, 2,5,6,6-tetramethyl-2,5-heptanediol, a fluorinated dicarboxylic acid, a matting agent, a calcined multiphase solid acid base powder and a doped Bi.sub.2O.sub.3 powder. The obtained fiber has an intrinsic viscosity drop of 18-26% when stored at 25° C. and R.H. 65% for 60 months. The method of improving the degradation performance of polyester fiber through the incorporation of 2,5,6,6-tetramethyl-2,5-heptanediol, the fluorinated dicarboxylic acid, the doped Bi.sub.2O.sub.3 powder and the calcined multiphase solid acid base powder is easy to operate.

A package has walls formed of a weldable spun-bonded nonwoven and having welded wall regions. The spun-bonded nonwoven has continuous filaments of a thermoplastic plastic each with a thermoplastic core surrounded by a thermoplastic sheath. The sheaths of the continuous multicomponent filaments of both components contain at least 3 wt % of at least one filler so that weldability of the spun-bonded nonwoven is improved by reducing a welding temperature in thermal welding of the spun-bonded nonwoven. A first plastic component forming the sheaths of the multicomponent filaments has the same or a lower melting point than a second plastic component forming the cores of the filaments.

A package has walls formed of a weldable spun-bonded nonwoven and having welded wall regions. The spun-bonded nonwoven has continuous filaments of a thermoplastic plastic each with a thermoplastic core surrounded by a thermoplastic sheath. The sheaths of the continuous multicomponent filaments of both components contain at least 3 wt % of at least one filler so that weldability of the spun-bonded nonwoven is improved by reducing a welding temperature in thermal welding of the spun-bonded nonwoven. A first plastic component forming the sheaths of the multicomponent filaments has the same or a lower melting point than a second plastic component forming the cores of the filaments.

A thermal-moisture comfortable polyester FDY for summer use and a preparation method thereof are provided. The FDY is made of matting agents dispersed polyester via the steps of spinning melt metering, extruding via the compositional spinneret, cooling, oiling, drawing, heat setting and winding. The woven fabrics manufactured with the FDY possess a wicking height and an evaporation rate of larger than or equal to 135 mm and 0.22 g/h, respectively. The compositional spinneret is simultaneously provided with cruciform orifices and circular orifices, and the length ratio of cruciform orifice to circular orifice is equal to the product of their equivalent diameter ratio and a coefficient K, here equivalent diameter is the ratio of orifice cross-section area to its circumference and K ranges from 0.97 to 1.03, and the oiling involves the oiling agent containing 67.30-85.58 wt % of crown ether.

A thermal-moisture comfortable polyester FDY for summer use and a preparation method thereof are provided. The FDY is made of matting agents dispersed polyester via the steps of spinning melt metering, extruding via the compositional spinneret, cooling, oiling, drawing, heat setting and winding. The woven fabrics manufactured with the FDY possess a wicking height and an evaporation rate of larger than or equal to 135 mm and 0.22 g/h, respectively. The compositional spinneret is simultaneously provided with cruciform orifices and circular orifices, and the length ratio of cruciform orifice to circular orifice is equal to the product of their equivalent diameter ratio and a coefficient K, here equivalent diameter is the ratio of orifice cross-section area to its circumference and K ranges from 0.97 to 1.03, and the oiling involves the oiling agent containing 67.30-85.58 wt % of crown ether.

A type of feather-like polyester fiber and a preparing method thereof are disclosed. The preparing method is to manufacture filament from a modified polyester through a POY process with a four-fold flat spinneret and a successive DTY processes, wherein said modified polyester is the product of the esterification and the successive polycondensation reactions of evenly mixed terephthalic acid, ethylene glycol, main-chain silicated diol and fluorinated dicarboxylic acid, and the spinneret is the one set with four-fold flat shaped orifices. The obtained fiber has a dye uptake of 89.6-93.7% when dyed at 130 C., and has an intrinsic viscosity drop of 13-20% when stored at 25 C. and R.H. 65% for 60 months. This invention is simple to apply and features a product with good dyeing and degradation performance.

A type of feather-like polyester fiber and a preparing method thereof are disclosed. The preparing method is to manufacture filament from a modified polyester through a POY process with a four-fold flat spinneret and a successive DTY processes, wherein said modified polyester is the product of the esterification and the successive polycondensation reactions of evenly mixed terephthalic acid, ethylene glycol, main-chain silicated diol and fluorinated dicarboxylic acid, and the spinneret is the one set with four-fold flat shaped orifices. The obtained fiber has a dye uptake of 89.6-93.7% when dyed at 130 C., and has an intrinsic viscosity drop of 13-20% when stored at 25 C. and R.H. 65% for 60 months. This invention is simple to apply and features a product with good dyeing and degradation performance.

Apparatus for manufacturing a non-woven fabric includes a diffusing shaft, which includes a first shaft portion in a defined location and provided with a slit-shaped air guide, wherein filaments are supplied together with air from an inlet side of the air guide to an outlet side of the air guide; a second shaft portion in a defined location, having an inlet side that is communicated with an outlet side of the first shaft portion and an outlet side that is disposed to face a filament collecting unit, wherein an opening width along a machine direction of the inlet side of the second shaft portion is larger than an opening width along a machine direction of the first shaft portion; and a stepped portion provided at a connecting portion between the outlet side of the first shaft portion and the inlet side of the second shaft portion and connecting the same.

Apparatus for manufacturing a non-woven fabric includes a diffusing shaft, which includes a first shaft portion in a defined location and provided with a slit-shaped air guide, wherein filaments are supplied together with air from an inlet side of the air guide to an outlet side of the air guide; a second shaft portion in a defined location, having an inlet side that is communicated with an outlet side of the first shaft portion and an outlet side that is disposed to face a filament collecting unit, wherein an opening width along a machine direction of the inlet side of the second shaft portion is larger than an opening width along a machine direction of the first shaft portion; and a stepped portion provided at a connecting portion between the outlet side of the first shaft portion and the inlet side of the second shaft portion and connecting the same.