This article consists of Standard test procedure for Clear PVC.

Standard test procedure for Clear PVC.

Procedural part of Standard test procedure for Clear PVC.

1.Description:

Following visual checking to be carried out:

Procedure: Examine the foil in day light for appearance

Foil roll should receive in properly wrapped with polythene bag and final packing in corrugated box. The foil roll edges should not be dent. Free from pit marks. Free from stains and foreign matters.

Note down the reading in test data sheet of Standard test procedure for Clear PVC.

2.Identification BY IR

Instrument: IR

Procedure Follow the procedure given under Grammage for separation of PVC and PVDC layers. Examine by infrared absorption spectrometer of PVC Film. The material to be examined shows absorption maxima   at   2975 cm¹ , 2910 cm¹,  2865 cm¹,  1430 cm¹, 1330 cm¹, 1255 cm¹,  690 cm¹,  615cm¹

3.Width:

(Test to be performed on maximum five pieces on sampled rolls)

Instrument: Scale.

Procedure: Measure the width of foil in mm by using scale.

Note down the reading in test data sheet of Standard test procedure for Clear PVC.

4.Thickness in mm:

(Test to be performed on maximum five pieces on sampled rolls)

Instrument: Digital Micrometer.

Procedure: Measure the thickness of foil in mm by using digital micrometer.

Note down the reading in test data sheet.

5.Winding:

(Test to be performed on maximum five sampled rolls)

Procedure: Check visually that winding is tight on the roll.

Note down the reading in test data sheet.

6. Core diameter: (Test to be performed on maximum five sampled rolls)

Instrument: Scale.

Procedure: Measure with either scale.

Note down the reading in test data sheet of Standard test procedure for Clear PVC.

7. Grammage: (Test to be performed on maximum five pieces on sampled rolls)

Instrument: Analytical Balance

Procedure: Cut the 5 X 5 cms piece of Foil by using scale and cutter. Weigh the piece on analytical balance, note down the weight in test data sheet (W1)

Calculation:

Weight of foil (W1) in gm                           10000

GSM =            ———————————-     x     ——————————

Length of piece in cms                      width of piece in cms

8. Revision History: