X-ray developing fibers have been prepared by melt spinning with polyurethane as matrix and BaSO_4 particle as developing agent in which the grain size is 0.5-5 μm, and its structure and properties are studied. The results show that a concrete structure presents with increasing of BaSO_4 content;
Using melt spinning technology,polyurethane/polyvinylidene fluoride(PU/PVDF) blend was spun into hollow fiber membranes with interfacial micro-voids. The miscibility of PU and PVDF was analyzed.
Continued to the part on the previous issue of this Journal in discussing the melt spinning,this paper takes isotactic polypropylene as example,expounds and analyzes the change of melt spinning fiber's structure and properties during its drawing process,and introduces a simulation method based on the fundamental equations of fiber spinning.
Compare with normal polyester melt-spinning, high tenacity low-stretch industrial yarn has the characteristic such as adding anti-oxidation agent before spinning ,spinning at high tempeature ,high pressure , postpone the cooling shaping ,two steps drawing and tension-setting.
It was very important to decrease spinneret draft in melt-spinning proces sing of PTT melt in order to decrease draw resonance and improve the spinnabilit y.
Polylactic acid fiber and polyester fiber are two kinds of synthetic fibers with similar properties and both can be made by using melt-spinning method.
The spinning conditions of pc-p flux mixture were stuided according to the relativity of rheological behavior and spinningable. They win have the guiding significant for selecting components and mixed process in the produced SiC-C fiber.
Due to the addition of FR10 and Sb2O3,the spinning temperature must be down for 8￣20℃,but there is no obvious change in the Physico-mechaniCal properties of PET fiber.
The reasons for overload protection failure of PET melt booster pump were analyzed, such as failure damage, pump shaft breakage, connecting shaft failure of torque limiter, friction pair sliding. The pre-fastening torque was calculated theoretically for the torque limiter.
The definitions and related basic concepts of melt spinning, wetspinning and dry spinning are introduced. Thereupon the particularand deep analysis is made to the melt spinning technology. Based on the relationship of time with temperature, fibre diameter, speed andcrystallinity, the process of fibre structure forming is described.The author points out that the crystallization taking place duringthe process of spinning is one occurred at non-isothermal, non-steadyconditions. Meanwhile, the crystallization e...
A series of new type of elastic fibers formed of poly(ester amides) and poly(tetramethy lene ether)glycol segments are made from the melt- spinning.The influence of composition,stress and annealling on the crystallizaion is investigated by x-Ray diffraction and differential ther- mal analysis.The results especially the formation of two crystallization- peaks are discused in view of the phase seperation and the sequence distribution statistics for finite chain length.
Continued to the part on the previous issue of this Journal in discussing the melt spinning,this paper takes isotactic polypropylene as example,expounds and analyzes the change of melt spinning fiber's structure and properties during its drawing process,and introduces a simulation method based on the fundamental equations of fiber spinning.
熔体纺丝
melt spinning
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