Quality Control and Laboratory Department
Chemfil as an organization focus on ensuring high quality, and that reflects in all our operations.
Our R&D team is continuously involved in monitoring, sampling, testing, recording and directing day to day production work . The Quality control team checks product at incoming stage, in-process production stage and in finished stage at the time of final packing.
Good laboratory practices and guidelines are set for lab safety, lab work efficiency, and quality assurance in everyday work. These guidelines ensure that labs operate in a safe environment with proper procedures in place.
Our team of specialists continuously checks Base and Resin Impregnated Filter Paper for measurement, evaluation of various test parameters such as GSM, Burst Strength, Max and Mean Pore Size, Air Permeability , Micron Rating, Tensile strength, High Temperature Curing etc.
PVC Compounds, PVC Plastisols, PVA Compouds, Polyurethane Resins are tested for viscosity, color, tensile, adhesion, curing time, pot life, shelf life, high temperature stability , hot oil stability parameters as per Indian and International standards.
Our laboratory is well equipped with Paper testing machines such as GSM Testing Machine, Pore Size Testing, Air Permeability, Burst Strength, Tensile Strength, Curing Ovens etc.
A few notes to describe testing terminology followed at Chemfil is as :
Micron Rating
A micron is a unit of measure in the metric system equal to 1 millionth of a meter in length (about 39 millionths of an inch). The average cross-section of a human hair is 40-90 microns. The human eye cannot see anything smaller than 40 microns in size.
Two filters may be considered to be 10 micron filters, however, one may remove a greater percentage of 10 micron size particles of contaminant, thus the filters would not be considered equal in performance. For a micron rating to be useful, you must know the filters’ removal efficiency of the specific particle size in question.
The term “nominal” micron rating typically means that the filter is capable of removing 50% of a specific size particle, however, some companies’ “nominal” micron ratings may range anywhere from 1 to 98.6% efficient at removing a specific particle size. The term “absolute” micron rating means that the filter is capable of removing at least 98.7% of a specific size particle. This rating is far more accurate.
A filter that is marked “10 microns” has some capability in capturing particles as small as 10 microns. However, there is no one accepted method to measure and describe the size of particles that a filter can capture or the total amount of particles that the filter can hold. When you see the filter marked “10 microns”, you will not know exactly what this means unless you also have a description of the test and standards used to determine the filter rating.
Burst Strength Test
This test helps in determining the strength of base and resin impregnated filter paper. Bursting strength is usually quoted in kg/cm2.
Test Method: BS 3137, BS 2922:1 and International standard ISO 2758 and ISO 2759.
Tensile Strength Test:
This test helps in determining the tensile strength of filter paper. A tensile strength test is a mechanical test performed on packaging materials to determine the maximum load that can be applied to a material before it ruptures. This test can be used to measure the tensile strength of paper. The material will show elastic behaviour up to a certain point and then rupture. This test can be adapted to different needs – it can also be used to measure the strength or elongation of a material and its tearing resistance.
Adhesion Strength Test
This test helps in determining the tensile strength of filter paper. A tensile strength test is a mechanical test performed on packaging materials to determine the maximum load that can be applied to a material before it ruptures. This test can be used to measure the tensile strength of paper. The material will show elastic behaviour up to a certain point and then rupture. This test can be adapted to different needs – it can also be used to measure the strength or elongation of a material and its tearing resistance.
Thermal Shock Test
Thermal shock assesses the resistance of packs to sudden changes in temperature. The packs are given a specified number of temperature cycles between a very low and extremely high temperature, within a short period of time.
Thermal shock refers to a very high rate of temperature change, typically 30°C per minute or higher and is appropriate for testing filter paper and filter adhesives. Because almost all products are subject to shipping, this test may be appropriate to any part that will have to withstand an abrupt temperature change in a short period of time, such as a transition from a warm warehouse to a freezing roadside while being loaded onto a truck.