The 1mm rigid PP sheet featuring an EVOH high-barrier layer is a high-performance packaging material specifically designed for food-grade dairy thermoformed packaging (such as yogurt cups, pudding cups, fermented milk cups, etc.). By utilizing multi-layer co-extrusion technology, it combines the structural rigidity of rigid PP with the exceptional barrier properties of EVOH. This combination significantly extends the shelf life of dairy products while balancing safety, aesthetic appeal, and processing compatibility, making it a premier choice for high-end dairy packaging.

**Core Structure and Material Characteristics**

This material employs a multi-layer co-extrusion composite structure. A typical configuration consists of PP (outer layer) / Adhesive Layer / EVOH (core barrier layer) / Adhesive Layer / PP (inner layer), with the total thickness precisely controlled at 1.0mm. The functions of each layer work synergistically to complement one another:

**Outer PP Layer:** Provides excellent mechanical strength, impact resistance, and printability. It enables high-definition graphic printing—enhancing product shelf visibility—while withstanding the compression and abrasion encountered during storage and transportation to prevent packaging damage.

**Inner Food-Grade PP Layer:** In direct contact with the dairy products, this layer is non-toxic, odorless, and resistant to acid and alkali corrosion, fully complying with food-contact safety standards. Furthermore, it possesses excellent heat-sealing properties, allowing for a secure seal with compatible lidding films to effectively prevent leakage.

**Intermediate EVOH High-Barrier Layer:** Serving as the core protective layer, EVOH (Ethylene-Vinyl Alcohol Copolymer) leverages the dense hydrogen-bond network within its molecular chains to deliver exceptional barrier performance against oxygen, moisture, and odors. Its oxygen-barrier capability is more than 10,000 times greater than that of pure PP material, far surpassing the performance of conventional materials such as PE or PA.