- Take a selected sample of PVC/PVDC 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 PVDC layer is separated or not.
- After the PVDC and PVC layers are separated the sample is collected. The sample is dried in a hot air oven for 5 minutes in both layers. Then cool at room temperature. Take the weight of the PVDC layer and record the weight
- Grammage of PVDC 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 PVDC.
- Grammage Of PVC layer = Total Grammage – Grammage Of PVDC
the identification of PVC/PVDC. the PVC is hard layer
I am Maneesh Maurya a professional pharmaceutical blogger from India having rich experience in the pharmaceutical Quality control field.
[…] alum/PVDC foil made from Aluminium is laminated with PVDC (Polyvinylidene chloride). The foil is the inner side of the PVDC layer and the outer side is the […]