Thursday, May 5, 2016

Measuring the fabric thickness



Fabric thickness is defined as perpendicular distance through the fabric, which determines the dimension between the upper and lower side of the fabric.
Determination of thickness of fabric samples in laboratory is usually carried out with the help of a precision thickness gauge.
In Fabric Thickness Gauge, the fabric whose thickness is to be determined is kept on a flat anvil and a circular pressure foot is pressed on to it from the top under a standard fixed load. Then the Dial Indicator directly gives the thickness in mm.
  
  Main Unit of Fabric Thickness Gauge: 




                           
                                                     Fig: Fabric thickness Gauge

▪ Anvil.
▪ Circular Pressure Foot
▪ Zero Setting Dial Gauge
▪ Knob for zero setting of the Dial Gauge.
▪ Dead Weight
▪ Lifting Lever.
  Grub Screw for Calibration.
▪ Circular Pressure Foot

Objective of Fabric Thickness Gauge:
         To know about the thickness of the fabric.
         To determine the value of the fabric different thickness.
         To know about the thickness of different fabric. 

Features of Fabric Thickness Gauge:
      Determines the thickness of yarns, fabrics, paper, etc.
       Range of measurement: 0 - 10 mm.
      Accurately and conveniently performs thickness measurement.
      Supplied with calibration & inspection certificates.
      Consists of a dial micrometer with a flat pressure foot and a flat anvil.
Specifications of Fabric Thickness Gauge:

Range of measurement           : 0 - 10 mm
Least count of dial gauge       : 0.01 mm
Diameter of anvil                    : 60 mm
Diameter of pressure foot       : 10 mm & 25 mm


Working Procedure of Fabric Thickness Gauge:
  • The fabric sample that is to be measured is kept on an anvil.
  • The press foot is gently lowered on to the specimen.
  • The reading is taken to get the thickness of the specimen.
  • The flat circular indenter of the micrometer exerts the specified pressure on the fabric sample.
  • The above procedure is repeated to obtain the values of thickness at least at 3 different locations.
  • The mean value of all the readings of thickness determined to the nearest 0.01m is calculated and the result is the average thickness of the sample under test.