Polyvinyl chloride (PVC) is a versatile thermoplastic polymer extensively used across various industries. To enhance its properties for specific applications, additives such as plasticizers, stabilizers, lubricants, fillers, and impact modifiers are incorporated. These additives improve PVC's flexibility, heat resistance, processability, and mechanical strength, making it suitable for products like window seals, flooring, pipes, and cables. Processing methods include dry mixing and extruder mixing, which blend raw PVC with additives to achieve desired characteristics. 

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