Shear refinement

The gloss and haze levels measured by Chung et al. [81] correlated very well with the applied stress in the shear refiner experiments. For these experiments the haze decreased and gloss Increased nearly linearly with the applied shear stress, as shown in Fig. 8.39. Thus, application of a shear stress of about 200 kPa to a 2 dg/min MI LDPE resin can improve the haze and gloss levels of the product film. The shear stress for the shear refiner was calculated using Eqs. 8.10 and 8.11. 

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Figure 8.38 Schematic for the shear refinement apparatus built by Chung et al. [81 ]...

Figure 8.39 Film haze and gloss as a function of the shear stress for shear-refined 2 dg/min Ml (190 °C, 2.16 kg) LDPE resin [81]...

Figure 8.40 Visual gels in a film produced from a mixture containing 50% HIPS resin and 50% of an impact-modifying elastomer. The components were dispersed using the shear refiner shown in Fig. 8.38 as a function of shear stress...

Figure 15.5 Schematic for a Maillefer fluted mixing section [21] for the shear refinement of...

Bleached sulfite softwood cellulose pulp shear refining, cryocrushing and dispersion in water by a disintegrator Refining to increase the accessibility of the cell 5-30 nm in diameter... 

Chakraborty A, Sain M, Kortschot M et al (2005) Cellulose microfibrils a novel method of preparation using high shear refining and crycxaushing. Holzforschung 59 102—107... 

Chakraborty, A., Sain, M., Kortschot, M. (2005). Cellulose microfibrils A novel method of preparation using high shear refining and cryocrushing. 59(1), 102-107. 

McDonald, J.W., Neoprene Adhesive Processing-High Shear Refining, DuPont Elastomers Informal Bulletin. 

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