A business using the cycle inventory method might count different items at different rates, based on the level of turnover or demand for that particular item. method of keeping track of inventory by performing inventory counts constantly, or on a frequent and regular basis, instead of once per year or once per quarter.
Effect of Heat. The melting point of polypropylene is about 165Â°C and while it does not have a true softening point temperature, the maximum processing temperature of the fibre is approximately 140Â°C. Prolonged exposure to elevated temperatures will cause degradation of the fibre, but anti-oxidants are incorporated in polypropylene fibres to protect them during processing and at normal service temperatures.
Polypropylene, or 'polypro', has been used for the fabrication of cold-weather base layers, such as long-sleeve shirts or long underwear. Polypropylene is also used in warm-weather clothing, in which it transports sweat away from the skin.hen the methyl groups in a polypropylene chain exhibit no preferred orientation, the polymers are called atactic. Atactic polypropylene is an amorphous rubbery material. It can be produced commercially either with a special type of supported Ziegler-Natta catalyst or with some metallocene catalysts.