The effects of heater temperature, linear density, draw ratio, and projected wrapping angle on the tenacity, crimp rigidity, skein shrinkage, breaking elongation of textured yarn produced by the cone drum twister studied experimentally. This presentation is made to show how these effects are very important in the working of the cone drum texturing device. Experimental results are compared with those of the pin twister.

Cotton and other cellulosic fabrics, such as rayon, polynosic, and linen were pretreated with liquid ammonia, and then were treated with cellulase. The fine structure, external appearance, bending properties, tensile strength, and wrinkle recovery of the treated fabrics were studied. The liquid ammonia pretreatment for four cellulosic fabrics changed the crystal structure, but cellulase treatment did not. Surface appearances were changed differently with or without liquid ammonia pretreatment. Moisture regain of the liquid ammonia pretreated fabrics decreased by cellulase treatment time. Water absorbency of fabrics without pretreatment decreased by collulase treatment, while it increased at long treatment times in the case of the liquid ammonia pretreated specimens. Bending rigidity of the liquid ammonia pretreated natural cellulosic fabrics (cotton, linen) decreased by cellulase treatment, but that of regenerated cellulosic fabrics (rayon, polynosic) increased by cellulase treatment. Tensile strength of the liquid ammonia pretreated fabrics was higher than that of fabrics without pretreatment. The same results were obtained after cellulase treatment.

Isothermal solvent diffusion phenomena for dioxane in polyethylene terephthalate (PET) film were analyzed. The change in diffusion behaviors was investigated in terms of the microstructural change of PET treated by drawing and by solvent-induced crystallization(SINC) using methylene chloride vapor. Using the Kelly-Bueche equation and adopting the classification scheme of Vrentas and the experimental results of Thomas and Durning, the diffusion behaviors of dioxane in PET can be classified as typical Fickian behavior above T , Case II above T among non-Fickian behaviors, and typical non-Fickian behavior above T , Case II above T among non-Fickian behaviors, and typical non-Fickian behavior above t According to changing the microstructure of PET. Also, the diffusion of dioxane in amorphous PET results in cry stallization due to good compatibility between PET and dioxane over whole investigated temperature range.

Miscibility of polymer blends prepared from poly(2,2(m-phenylene)-5,5'-ben-zimidazole), PBI, and aromatic polyimides(Pls) were investigated as a function of structural variations of polyimide component utilizing DSC and FTIR spectroscopy. Film and powder blend samples were prepared from the solution of PBI and PIs in N,N-dimethylacetamide(DMAc) and/or 1-methyl-2-pyrrolidinone(NMP). The miscibility of the PBI/PI blends was found to improve with increasing polarity of the polyimide component. For example, 3,3'-diaminodiphenyl sulfone(3,3'-DDS)/3,3',4,4'-benzophenone tetracarboxylic dianhydride(BTDA), 3,3'-DDS/4,4'-ox-ydiphthalic anhydride(ODPA) and 4,4'-isopropy lidene dianiline(BIS-A)/ODPA polyimide systems were miscible with PBI. However, when the polar polyimide components(C=O, O and SO ) were replaced by non-polar components such as hexafluoropropylidene group((CF ) C) miscibility was significantly reduced. Thus, immiscibility was obtained for polyimides based upon 5,5'-[2,2,2-trifluoro-1-(trifluoromethyl) ethylidene] his-1,3-isobenzofuranedione (6FDA) such as 4,4'-di-aminodiphenyl sulfone(4,4'-DDS)/6FDA,4,4'-oxydianiline(4,4'-ODA)/6FDA and BIS-A/6FDA polyimide systems. Non-hydrogen bonded solubility parameters for the PBI and Pls were estimated using group molar attraction constants(F) and group molar volume(V). The observed miscibility behavior was in good accord with the prediction of miscibility by the non-hydrogen bonded solubility parameter approach.

Sodium hypophosphite(SHP) has been reported to be the most excellent catalyst for 1, 2, 3, 4-butanetetracarboxylic acid(BTCA) in durable press finish of cotton fabrics. But it has some disadvantages in respect of price, environment, and dyeing, etc. In this study sodium lactate was used as an alternative catalyst to sodium hypophosphite and found to be comparable catalyst to SHP for BTCA. The reaction mechanism of BTCA and cellulose was reviewed and discussed by referring to the FT-lR spectra. Tearing strength and abrasion resistance of BTCA treated fabrics were improved when a little quantity of softening agent was added to the treating bath.

PP/nylon 6 blends using maleic anhydride grafted PP, propylene-acrylic acid copolymer and Polytail H as a compatibilizer have been investigated. The weight ratio of PP and nylon 6 is fixed for 20/80. The compatibilizer is incorporated with 0.4, 0.8, 1.2 and 1.6wt% based on the total weight of PP/nylon 6 blends. The morphology, mechanical and dynamic mechanical properties have been characterized. The average size of PP domain with incorporation of compatibilizers was decreased from 10 $\mu$m to a few $\mu$m and the adhesion between the phases was greatly improved, resulting from the effect of the compatibilizer The PP/nylon 6 blends using maleic anhydride grafted PP as a compatibilizer showed good mechanical properties.

To improve the static electricity of acrylic fiber, chemical method was introduced. Polyacrylonitrile copolymer with pyrrolidone group(PBPGP) was synthesized by copolymerization of acrylonitrile(AN) and methylacrylate(MA) initiated by aqueous sulfite-chlorate redox system under the presence of polyvinylpyrrolidone(PVP). The fibers from PBPGP and virgin acryl polymer(PAN) were manufactured by wet-spinning at DMF system. The physical properties of fibers were investigated by IR, SEM, DSC, Rheovibron, Instron and Static Honestometer. Within measured range the physical properties of PBPGP and PAN fibers were nearly on a par except static the electricity the electricfied potential of PBPGP fiber differ little from that of PAN fiber but the half-life of static electricity of PBPGP fiber was markedly shorter than that of PAN fiber.

Direct printing on polyester car upholster fabrics is a novel technology. With a suitable choice of liquid, non-ionic, sublimation-resistant disperse dyes with high light fastness-the Terasil X dyes-the sublimation-resistant, highly effective UV absorber Cibafast P. plus awareness of and allowance for the special requirements of textiles in cars, polyester car upholstery fabrics can be successfully direct printed. We are convinced that direct printing will focus car textile coloration along new lines. It gives designers fresh scope, increases flexibility in the production process, and enables decisions on the items to be produced to be taken at a very late point in time. Chrysler's chief designer, writing in the American newspaper Automotive and Transport $Interior^2$, had the following to say on this topic : 'The (auto) industry will have access to whatever the mind, eye and computer can create. Design sill not be limited in any way - shape, form or color'.