Stretching characteristic

The bulk of men s underwear currently for sale is either 100% cotton or polyester-cotton (typically 65%/35%), although there are some stretch fabrics (e.g., 95% cotton, 5% Elastane). Stretch components may be confined to the waistband, or in some garments the base fabric also has stretch characteristics. 

The evidence of the effect of complexation was established by the absence of an absorption band at 3191 cm (N-H stretching characteristic of a purine function in Azathioprine) e.g., the aminogroup is involved in the formation of the metal complex. The anticancer action of purine derivatives was discovered in 1949. This cytostatic drug biotransforms to 6-mercaptopurine in the body. ... 

Fabrics containing elastomeric fibres can be heat-set. A tricot or sleek-knit fabric knitted from nylon 6 and polyurethane may be satisfactorily heat-set at 180-185 C for 20-25 sec. Slightly higher temperatures (190 C) may be used for nylon 6,6. However, the required width and stretch characteristics of the finished fabric determine the precise conditions to be employed with a particular fabric [29]. 

Another major utility of these blends are for making diving suits. A few examples are shown in Fig. 15.18. Pro-Am (Fig. 15.18a) is a rubber suit made from NR/EPDM blend. The main features are good stretch characteristics for comfort and three layer construction for durability. It is ideal for sports, military, rescue, and light commercial applications. The Pro-hd (Fig. 15.18b) is tough NR/ EPDM blend rubber suit made to endure the harshest conditions.USIA(Fig. 15.18c) is also a vulcanized rubber suit made from NR/EPDM blend and it is ideal for sports, military, rescue, and light commercial applications. 

Tension tests according to DIN EN ISO 527 were carried out on the laminates with six tests per series to determine their tensile strength, the tensile e-modulus and the breaking point. Measurement of stretch characteristics was made using a video extensometer under standard weather conditions (23 2°C, 50 5% relative density) according to DIN 50014-23/50-2, i.e. three measurements, 0.01 mm exactness. For the determination of the force-tension range, the e-modulus was between e i = 0.05% and e"2 = 0.25%. Wind and snow loads were calculated as vertical loads. Other temporary loads have also been calculated as vertical pressure loads. An example for a rib type 350 is shown in Fig. 15.22. 

To produce the Action Fit the algorithms for the Form Fit patterns are enhanced to take into account the selected fabric stretch characteristics, the desired fit level and the radius of ciu ature, which can vary for adults and children or for different body zones. The resulting parametric pattern produces an Action Fit stretch bodysuit that is a true custom fit for the selected body shape size, fit level and chosen fiibric. 

Approximately 95% of the pits are reproduced as holes in the rubber sheet. The holes are not exactly cylindrical in shape but are reinforced by slight constrictions which contribute to strength and tear resistance. This type is referred to as "plain," and can be made with fabric backing on one or both sides to control stretching characteristics. If the unvulcanized material is first stretched, and then vulcanized while stretched, it is called "expanded." Resulting holes are oval and have a higher porosity (sometimes up to 30%). Special compounds have been formulated for resistance to specific chemicals under high concentrations at elevated temperatures, such as 25% sulfuric acid at 180°F. 

PAN is usually co-polymerized with a small amount of another monomer such as methyl acrylate or vinyl acetate. This co-polymerization lowers the glass-transition temperature from 120°C to <100°C and, as a result, improves the spinning and stretching characteristics. 

Ink analysis and related analyses of questioned documents have come to rely heavily on IR spectroscopy. As with paints, applications evolved from traditional IR through DRIFTS techniques and now employ principally MSR Inks are analyzed in situ or on sampling substrates such as KBr plates. like paints, inks produce IR spectra representative of mixtures unlike paints, inks rarely have a layered structure. Regardless, spectra of inks do contain information that is useful for classification. For example, a study of 108 inks demonstrated that distinctive absorption bands could be rationalized on the basis of ink composition and then employed to divide the test population into two groups. As shown in Figure 12.7, one group contained C—C stretching characteristic of an epoxy resin and features associated with triarylmethane dyes, as shown in... 

Figure 1 Scanning electron micrograph of the surface of extrusion-blown LDPE film containing 10% of maize starch. As the extruded tube is inflated and stretched, characteristic mounds are raised by the solid starch particles, average diameter 15gm. Magnification circa x350,...

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