Take a selected sample of PVC/PE Film. Cut the sample into 10 x 10 cm or 5 x 5 cm it’s suitable with the help of a GSM Plate. Weight the samples one by one on an analytical balance. Its reading records it.
Total Grammage = weight in grams 100 or 400 (if the sample is cut 10 x 10 cm or 5 x 5 cm)
Take the total Grammage sample and dip it in a beaker containing acetone (or ethyl acetate), we ensure the sample is completely dipped in regent. After 15 to 20 min, we check the intermittency whether the PE layer is separated or not.
After the PVDC and PE layers are separated the sample is collected. In both layers, the sample is dried in a hot air oven for 5 minutes. Then cool at room temperature. Take the weight of the PE layer and record the weight
Grammage of PE Layer = weight in gram x 100 or 400(if the sample is cut 10 x 10 cm or 5 x 5 cm)
PVC Layer absorbs the regent then after it swells the sample. It does not get an accurate weight, so we calculate the GSM with the help of the GSM of PE.
Grammage Of PVC layer = Total Grammage – Grammage Of PE
