Ventile Brochure

Breaking/Tear Strength Test: Fabric is placed in a tensile tear tester which applies increasing strain upon the material in an attempt to tear it. The exact breakage point is measured to gauge fabric strength. A subsequent test measures forces required to tear fabric across its wrap and weft measuring resistance of fabric to ripping once an initial breach has been made. Reason: To establish suitable uses for the fabric in garment production. For example, a speci fi c fabric can be used in areas such as seat, knee and shoulder impact areas which often come under substantial strain, whereas other fabrics may be more suitable for use as linings in jackets or as material for shirts. Dimensional Stability Test: The fabric is washed at 30 degrees centigrade or soaked in water over a period of 24 hours at 20 degrees centigrade. Reason: To measure shrinkage across the warp and the weft of the fabric. Important in determining to what degree fabric shrinkage occurs and to ensure that respective speci fi cations are always met. Water Repellency Test: Shower test. Water is poured over fabric at controlled rate and pressure for a period of 30 minutes, equivalent to 1 hour of heavy rain. Fabric is subsequently examined and weighed for any water absorption. Reason: To establish performance of Durable Water Repellancy treatment. Indiscernible to touch or naked eye, hydrophobic (water hating), DWR treatment has the characteristic of a special fi nish making water bead o ff the fabric as demonstrated in nature. Hydrostatic Head Test: Water forced under pressure (hydrostatic head) against the fabric to see at what point moisture penetrates. Testing is carried out over a fi ve minute period at di ff erent pressure levels. Reason: While rain droplets do not hit with su ff icient force to penetrate the fabric, areas of garment such as the knees (when kneeling), shoulders (when carrying a rucksack) are often subjected to high pressure. If wet, water can be forced through these areas on fabrics with a low hydrostatic head. Air Permeability Test: Air is drawn through the fabric to establish wind resistance. Reason: To test for wind resistance. This is essential if garments are to be used in windy environments or in medical circles where strike through of bacteria is to be prevented. Water Vapour Permeability Test: The test is carried out on the so called ‘skin model’ the main part of which is a porous plate and the resistance towards water vapour penetration (evaporated sweat) is determined. For this the heating energy used by the plate to evaporate the water is exactly measured. The smaller the resistance the higher the rate of water transmission through the fabric. Reason: Breathability of a fabric is important if the wearer is to stay dry and comfortable, by avoiding a build-up of moisture inside the garment when active. The higher the MVTR, the more comfortable the wearer will be. Colour Fastness Test: Fabric is exposed to dry and wet rubbing against white cotton fabric, and also to washing together with a special industrial standard compilation strip of di ff erent materials to see the staining e ff ect on the various fi bre materials. Tests are also undertaken under the in fl uence of sweat simulating solutions. Reason: To see if there is a danger of colour staining and/or bleeding and affecting other garments and also to establish at what rate the material will fade. Before we bring you a performance fabric, we test it in every way possible. Ventile has been subjected to some of the most stringent tests in the textile industry and comes out with fl ying colours. Ventile has been exposed to tensile tear strengths where our advanced machines measure exactly how di ff icult it is to tear the fabric across its weft and warp (horizontal/ vertical weave of fabric). We experiment with different types of stitching, try to pump water under pressure through the fabric (hydrostatic head), measure moisture vapour transmission rates for breathability and conduct abrasion tests, all in an e ff ort to ensure you get the best natural fabric available to mankind. Test Method TESTING