Fiber refers to dietary material containing substances like cellulose, lignin, and pectin, which are resistant to the action of digestive enzymes. Found in fruits, vegetables, whole grains, and legumes, fiber is crucial for promoting healthy digestion, preventing constipation, and may help in managing blood sugar levels and weight by prolonging the feeling of fullness. There are two types of dietary fiber: soluble, which dissolves in water and can help lower glucose levels and blood cholesterol, and insoluble, which helps food move through your digestive system, enhancing stool bulk. The recommended daily intake is about 25 grams for women and 38 grams for men, yet most people consume less than half the recommended amount. Including a variety of fiber-rich foods in your diet is an excellent way to improve overall health.

Polypropylene (PP) is a thermoplastic polymer used in a wide range of applications with specifications tailored to meet various requirements. Key specifications include density, typically around 0.905 g/cm³, melt flow index (MFI), which defines its flow rate in a molten state and usually ranges from 1 to 100 g/10min, impacting processing characteristics. Tensile strength and elongation at break are critical for mechanical performance, with values often around 30-40 MPa and 100-600%, respectively. PP also features a melting point between 160-170°C, making it suitable for thermal processing. Chemical resistance to bases, acids, and solvents is a notable property, though PP's UV resistance can be variable, necessitating additives for outdoor use. Specifications can vary based on application needs, including for packaging, automotive components, textiles, and consumer goods, underscoring the importance of selecting the right type of PP for specific uses.

Polypropylene is a versatile plastic that can be both hard and soft, depending on its fabrication method. It is part of the thermoplastic family, meaning it becomes moldable at a certain temperature and solidifies upon cooling. The characteristics of polypropylene can be adjusted through the use of additives or by modifying its polymer chain structure during manufacturing. This allows for a wide range of applications, from rigid containers and automotive parts to flexible textiles and packaging. Its hardness or softness is, therefore, not fixed but engineered to meet specific requirements.