PVC Film Testing Procedure :
Polyvinyl chloride is also known as vinyl is one of the most versatile and one of the least expensive polymer made of chloride and carboxylic. The density of PVC is 1.35 to 1.45 g/cm2. The properties of PVC is low barrier film suitable for stable molecules, cost effective blister pack, Amorphous in nature, Water vapor transmission rate 3.5 g/m2/day, Available in range of colours, They give long shelf life. PVC films that are thermoformed have a of thickness range of 200 micron to 300 micron. it shall be of uniform thickness. PVC film used is of Grammage range of 300 gsm to 400 gsm.
Toxic and Non toxic PVC: It is depends on the vinyl chloride monomer. If it is greater than 1 ppm than it is dangerous, as its carcinogenic. If monomer used is greater than 1 ppm than toxicity will be increases. The pharmaceutical grade film used is zero ppm and less than 1 ppm. The pharmaceutical grade film is non-toxic, free from plasticisers and heavy metals. It is also tasteless and odourless.
- Description:
- Acceptance Criteria: Non toxic, Clear transparent/ __________ Coloured/ opaque , smooth on both side, free from foreign material.
- Pinhole test : Place 1 meter piece of PVC film in front of light source & observe, there should not be any hole.
- Acceptance criteria: Should be absent when checked with normal naked eye.
- Cleanliness check :
- Acceptance criteria: It should be free from foreign particles and dust.
- Width: Measure width with calibrated measuring scale.
- Acceptance criteria: _______ ± 2 mm
- Thickness : Measure Thickness with calibrated micrometer.
- Acceptance criteria: ________ ± 0.02 mm
- Grammage : Cut the sample in 10 cm x 10 cm piece or suitable measured scale, weigh it and calculate the Grammage with following formula,
Weight of 10 cm x 10 cm piece in gm
Grammage = ————————————————– x 10000
Total area of piece in cm2
- Acceptance criteria: Not less than 300 gsm.