50results about How to "Low boiling water shrinkage" patented technology

The present invention provides a nonwoven fabric sheet used in an extraction-use filter, etc., with which it is possible to obtain great seal strength, and also provides an extraction-use filter, etc., manufactured using the nonwoven fabric sheet. Such a nonwoven fabric sheet is provided with: a first layer comprising a spun-bonded nonwoven fabric formed from fibers of a polyester-based resin in which the IV value is 0.60-1.00, the crystallinity is 30-80%, the crystalline orientation is 60-95%, and the birefringence ([Delta]n) is 0.040-0.100, the spun-bonded nonwoven fabric having a partial thermocompression bonding section in which the thermocompression bonding area rate is 5-30%; and a second layer comprising a melt-blown nonwoven fabric formed from fibers of a polyester-based resin blown onto the surface of the first layer and solidified to a crystallinity of 0-14%. The extraction-use filter, etc., are formed by placing the second layer of the nonwoven fabric on the inside and sealing a prescribed portion by fusion.

A low-temperature dyeing method of PLA / PHBV blended yarn comprises steps of: wetting the PLA / PHBV blended yarn into deionized water of 60-90 degrees centigrade, cleaning for 15-30min; taking disperse dye of 0.5%-2% of the weight of the blended yarn, dissolving the disperse dye into the deionized water to form a dye liquor, putting the blended yarn into the dye liquor, dyeing as per a bath ratio of 20-30:1, firstly heating up the dye liquor to 65-75 degrees centigrade by 2-4 degrees centigrade / min, heating up to 90-100 degrees centigrade by 1-2 degrees centigrade / min, maintaining the temperature for 40-60min; then cooling down to 50 degrees centigrade by 3-5 degrees centigrade / min, and taking out the blended yarn; reduction clearing the blended yarn, wherein the reduction clearing solution comprises 0.5-1g / L of sodium hydrosulfite and 0.5-1g / L of anhydrous sodium carbonate; the temperature of the reduction clearing solution is 75-90 degrees centigrade; the bath ratio is 20-30:1; and the reduction clearing duration is 20-30min. The low-temperature dyeing method of PLA / PHBV blended yarn solves the low-temperature dyeing problem of the PLA / PHBV blended yarn; the method saves energy and reduces production cost, and it has the advantages of deep dye color, uniform dyeing effect, washing fastness, and good crockfastness.

The present invention relates to drafting deformed dacron filament with low boiling water shrinkage and its production process and application. The POY material filament is processed successively through the first drafting roller, the first heating box, cooling plate, false twisting unit, the second drafting roller, network forming unit, 2bis roller, the second heating box, filament guide unit and filament breaking detector; adding weak network in the resilience increasing process; oiling and winding steps to obtain DTY filament. The present invention has lower deformation temperature, higher settling temperature, short process, reasonable technological control and stable production operation; and the product has boiling water shrinkage not higher than 1.0%, excellent built-in curling elasticity and wrapping. The product may be used in making embroidery string and trademark string.

The invention belongs to the field of manufacture of chemical fibers, in particular to a method for producing a modified cation polyester filament imitating a cellulose fiber. The method comprises the following steps of: preparing modified cation polyester; carrying out melting spinning by aiming at the characteristics of the modified cation polyester to obtain an orientated filament; and carrying out false twisting on the orientated filament under the condition of a special elasticizing process. The invention also provides a modified cation polyester filament prepared with the production method. The cation polyester filament disclosed by the invention has favorable fuzzing and pilling resistance, can be dyed at normal pressure without high-temperature and high-pressure conditions, saves the dyeing cost and has bright color after being dyed and high skin intimacy, and the hygroscopicity is better than that of common cation terylene filament.

The invention relates to a production method of an ultra-low-shrinkage composite crystal flax fiber. The production method comprises the following steps: semi-dull FDY raw yarn and semi-dull POY raw yarn are adopted as main raw materials, the two different types of raw yarn are simultaneously introduced into a tow traction tube, a tow directly enters a yarn inlet and feed roller through a yarn guide and enters a compressed air network below the yarn inlet and feed roller, then the high-temperature shaping is carried out after the tow enters a lower hot box, the composite tow after shaping is sent out by a yarn outlet and discharge roller, and the winding and the shaping are carried out by guiding the composite tow to a spindle friction roller through the yarn guide after full oiling on an oil wheel. The production method of the ultra-low-shrinkage composite crystal flax fiber and a device thereof provided by the invention carry out the production on the traditional 1000 type polyester stretch yarn machine, and the melt direct spinning semi-dull FDY and the semi-dull POY are taken as the raw yarn for producing the composite crystal flax fiber, thereby changing the traditional process idea and leading the traditional stretch yarn machine to play a new production role. The device omits a first roller, an upper hot box, a cooling plate, a false-twister and other parts of the original device and is further provided with the yarn inlet and guide device, thereby not only changing the process route, but also saving energy.

The present invention relates to an improved one-step drawing method for preparing polyester filament for weaving tape. Said polyester filament is characterized by that it cross section is made into the form of trefoil, heterogeneous degree is 34-39%, extensibility is 40-50% and shrinkage in boiling water is 6.0-7.0%.

The invention relates to a colored profiled polyester multifilament fiber with stable dimension and a preparation method thereof. The preparation method comprises the following steps: adjusting contents of polyester, pigment masterbatch and an additive in a fusant according to a certain proportion, drying and dehydrating, forming after melting, extrusion, spinning and cooling, and obtaining finished filament after oiling, coiling, heating, tensioning, heat setting, inspection and grading. The fiber can be prepared with conventional spinning equipment, has even multifilament bundle yarn and even color distribution, can be widely applied to fields of clothing, decoration and industry. Fabric is smooth, is characterized by soft luster, high breaking strength and low breaking elongation, can ensure stable geometric dimension of the fabric without easy deformation; and the fiber has the advantages of good fabric elastic resilience, less creep and relaxation and low boiling water shrinkage,and can improve the stability due to hard deformation at high temperature.