Polyethylene-Low Density is a polymer that can be used to form a plastic bag and its zip closure. It is part of the Polyethylene (PE) family, which is the most widely used plastic. Polyethylene-Low Density, also known as LDPE, is commonly used in rigid plastic containers. We use a mix of different polyethylene densities to get the ideal strength and flexibility for different bag types. It is approved for use in products that come into direct contact with food. Polyethylene-Low Density can withstand both heat and freezing. Check your product label for more information and rest assured that Ziploc^® Brand products that are marked as "microwaveable" meet the safety requirements of the U.S. Food and Drug Administration (FDA) for temperatures associated with defrosting and reheating food in microwave ovens, as well as room, refrigerator, and freezer temperatures.

Polyethylene-Linear Low Density is a polymer that can be used to form a plastic bag and its zip closure. It is part of the Polyethylene (PE) family, which is the most widely used plastic. Polyethylene-Linear Low Density, also known as LLDPE, is commonly used in packaging, containers and wraps such as bubble wraps. We use a mix of different polyethylene densities to get the ideal strength and flexibility for different bag types. It is approved for use in products that come into direct contact with food. Polyethylene-Linear Low Density can withstand both heat and freezing. Check your product label for more information and rest assured that Ziploc^® Brand products that are marked as "microwaveable" meet the safety requirements of the U.S. Food and Drug Administration (FDA) for temperatures associated with defrosting and reheating food in microwave ovens, as well as room, refrigerator, and freezer temperatures.

For competitive reasons, the supplier of this resin has asked us to keep the details confidential, and we're legally bound to do so. But we can tell you that it's a resin that we use to form a plastic bag and its zip closure, and that it is compostable through curbside commercial composting that accepts food scraps and compostable bags. (Not for backyard composting.) Check for availability of curbside commercial composting in your community; these facilities do not exist in many areas.

Clariant PE53760090 Blue is a colorant, or dye. We add dyes to products for a variety of reasons including helping you see where you applied the product, when a product is used up, or for aesthetic reasons. Clariant PE53760090 Blue is added for aesthetic reasons – it is used to add color to a bag's zip closure. It is a product of Clariant, which is responsible for its contents.