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At low concentrations, HEC solutions exhibit Newtonian behavior, characterized by a constant viscosity regardless of shear rate. However, as concentration increases, the solutions transition to non-Newtonian behavior, and the viscosity becomes dependent on the shear rate applied. This behavior is particularly beneficial in applications that require modifications of flow properties under different processing conditions such as mixing, pumping, and application.

Another important property of HPMC is its rheological behavior. The polymer exhibits pseudoplasticity, meaning that its viscosity decreases under shear stress. This property is particularly useful in formulations requiring easy application and spreading. For instance, in the cosmetics industry, HPMC allows for smoother application of creams and lotions while providing stability to emulsions. Similarly, in the food industry, it is used as a thickening agent and stabilizer to improve texture without compromising flavor.

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When exporting or importing HPMC, it is crucial for businesses to accurately determine the correct HS code. This involves understanding the composition of the product, its primary use, and the specific standards set by customs authorities. Misclassification can lead to delays, fines, or even confiscation of goods, highlighting the importance of thorough research and due diligence in compliance matters.

Furthermore, HPMC finds applications in the cosmetics and personal care industry, where it is used as a thickening agent and emulsifier in lotions, creams, and gels. Its ability to enhance product stability and improve sensory attributes has made it a popular choice among cosmetic formulators. HPMC manufacturers are continually innovating to produce grades that cater to the evolving demands of this fast-paced industry.

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In the context of putty powders, HPMC serves multiple key functions. One of its most important roles is that of a thickening agent. By increasing the viscosity of the mixture, HPMC ensures that the putty adheres well to vertical surfaces without sagging or slumping. This property is particularly beneficial for interior and exterior wall applications, where proper adhesion is critical for maintaining the integrity of the surface finish.