Multi-layer films and labels are disclosed herein. In an embodiment, a multi-layer film comprises a first skin layer, a first intermediate layer, a core layer, a second intermediate layer, and a second skin layer arranged sequentially, wherein the core layer has a thickness that is greater than thickness of the first or the second intermediate layers or the skin layer, wherein the core layer includes polybutylene terephthalate (PBT) particles disposed therein, wherein the amount of PBT particles ranges from about 5 to about 10 percent by weight (wt %), based on the total weight of the core layer, wherein the multi-layer film has a thickness ranging from about 25 microns to about 45 microns, wherein the core layer has a thickness ranging from about 20 microns to about 40 microns.

Embodiments of the present disclosure disclose a composite crystal flooring. The composite crystal flooring may have a multi-layer structure. The composite crystal flooring may include a substrate layer. The substrate layer may include at least a first structural layer, a second structural layer, and a third structural layer. The second structural layer may be located between the first structural layer and the third structural layer. A foaming density of the second structural layer may be less than 1.1 grams per cubic millimeter. Components of the second structural layer may include polyvinyl chloride, one or more inorganic fillers, at least one foaming agent, at least one foaming regulator, at least one lubricating agent, and at least one stabilizer. The one or more inorganic fillers may include modified fly ash, hollow glass microbeads, and composite calcium. The composite crystal flooring with a low density may have good thermal stability and rigidity.

A sound-insulating material includes 16 to 24% by weight of a base resin having a thermoplastic olefin (TPO) and a polyolefin elastomer (POE) and 76 to 84% by weight of an inorganic filler. The sound-insulating material can be used, for example, as part of a sound-absorbing and sound-insulating material in a vehicle.

Embodiments of the present disclosure disclose a composite crystal flooring. The composite crystal flooring may have a multi-layer structure. The composite crystal flooring may include a substrate layer. The substrate layer may include at least a first structural layer, a second structural layer, and a third structural layer. The second structural layer may be located between the first structural layer and the third structural layer. A foaming density of the second structural layer may be less than 1.1 grams per cubic millimeter. Components of the second structural layer may include polyvinyl chloride, one or more inorganic fillers, at least one foaming agent, at least one foaming regulator, at least one lubricating agent, and at least one stabilizer. The one or more inorganic fillers may include modified fly ash, hollow glass microbeads, and composite calcium. The composite crystal flooring with a low density may have good thermal stability and rigidity.