Polyethylene

PE is the most frequently used polymer in food-packaging applications because of its low cost, easy processing, and good mechanical properties. PE also has the simplest chemical composition of all polymers, being essentially a straight-chain hydrocarbon. The major classifications of PE are high-density polyethylene (HDPE), low-density polyethylene (LDPE), and linear low density polyethylene (LLDPE). These classifications differ in density, chain branching, crystallinity, and so on. Within each classification are numerous grades that have different additives, molecular weight distributions, and other properties.

HDPE has a density typically between 0.94 and 0.97 g/cm3. It is a linear polymer with relatively few side-chain branches (Fig. 3), and hence the macromolecules can fold and pack into an opaque, highly crystalline structure.

Homemade Pet Food Secrets

Homemade Pet Food Secrets

It is a well known fact that homemade food is always a healthier option for pets when compared to the market packed food. The increasing hazards to the health of the pets have made pet owners stick to containment of commercial pet food. The basic fundamentals of health for human beings are applicable for pets also.

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