Type of sealing film
Sealing film meaning
Sealing film generally refers to a flexible plastic or laminated film used to seal containers (trays, cups, bottles) to preserve freshness, prevent leakage, and provide tamper evidence and layer of material used to create a seal — typically airtight, watertight, or tamper-evident — between two surfaces or over an opening.
How many types of sealing films are there, and how can you tell them apart?
Because the sealing film is heat-sealed to the opening of the sealed container during product production and presented to the consumer, many laypeople mistakenly define it as individual plastic sheets, which is not the case. More precisely, sealing film is a type of flexible packaging film; depending on the sealing layer, it can be divided into two types: peelable and un-peelable sealing film.
This type of sealing film is heat-sealed to the container opening during production and vacuumed (to keep the contents fresh). When consumers use the product, they can open the film by tearing along a designated tear notch. It is commonly used to seal containers for products such as jelly, sauces, yogurt, and meat-based items. Typical sealing layers include EVA, tearable RCPP, and multilayer co-extruded modified PE.
This type of sealing film is heat-sealed to the container opening during production and vacuumed (to keep the contents fresh), but no tear notch is provided (i.e., it can only be opened with a straw or cut with a tool). It is commonly used to seal containers for products such as juice and milk tea,boba tea and etc. The typical sealing layer is CPP, and non-tearable RCPP.
