4 Side Seal – 4SS
4 Side Seal - 4SS
4SS uses two compatible films or webs and seals them together with the product encapsulated between them.
The sealing can be intermittent or constant (rotary) depending on its design, but the latter is usually faster.
The finished pack can be considered 2D in shape so it only suitable to fairly flat products such as wound care products and some drapes or electrodes.