FYI Tester Instrument

  Fabric stiffness is one of the basic styles of fabrics and one of the key indicators that determine the beauty of fabrics and consumer preferences, such as the stiffness of suits, the softness of knitted underwear, and the stiffness of nonwovens. What is the stiffness of fabric The stiffness of clothing materials refers to the flexural stiffness and softness of the fabric. The ability of a fabric to resist shape changes in its bending direction is called bending stiffness. Bending stiffness is often used to evaluate its opposite characteristic – softness. The bending stiffness of clothing materials is determined by the bending stiffness and structure of the fibers and yarns that make up the fabric, and increases significantly as the thickness of the fabric increases. Knitted fabrics have greater softness; compared with knitted fabrics, woven fabrics of the same thickness have greater bending stiffness. Under other conditions being equal, plain weave fabric is stiffer. As the yarn flo

  The crease recovery property of fabric is one of the important indexes to evaluate the properties of fabric. Measuring the crease recovery angle of folded fabric samples by instrument is a common method to measure the crease recovery property of fabric. Crease recovery properties of fabrics When the fabric is used and stored in the process, due to folding, bending arch, compression, washing and other external forces to produce local deformation, the formation of creases or wrinkles. Even after the external force is removed, it fails to return to the original flat state, which is called creasing. Creases seriously affect the appearance of the fabric, and the wear of the fabric is often produced along the direction of creasing, accelerating the damage of the fabric. It is of great significance to understand the crease bending and recovery process of fabric and its mechanism to test the crease recovery performance of fabric. Generally, the formation of fabric creases can be divided into

  When fabrics are worn or used, they are often subject to concentrated loads perpendicular to the plane of the fabric. The fabric bulges and expands from one side until it breaks, such as at knees, elbows, shoe uppers, glove fingers, and sock toes. This phenomenon is called bursting or bursting. Since its force mode is multi-directional force damage, this test is particularly suitable for knitted fabrics, three-way fabrics, non-woven fabrics and parachute fabrics. Basic principles of bursting performance testing (1) Steel ball method: A sample of a certain area is clamped in a circular sample clamp on a fixed base. The spherical ejector pin vertically pushes against the sample at a constant moving speed, causing the sample to deform until it breaks. The bursting strength was measured. (2) Hydraulic method: Clamp a sample of a certain area on an extendable diaphragm, and apply liquid pressure below the diaphragm. Then, the volume of the liquid is increased at a constant speed to expand

  Fabric tear test is mainly used to test the tear resistance of film, sheet, soft polyvinyl chloride, polyvinylidene chloride (PVDC), waterproof coil, braided material, polyene warp, polyester, paper, cardboard, textiles and non-wovens. Tear strength test method Impact pendulum method Suitable for woven fabrics, non-woven fabrics, etc., but not suitable for knitted fabrics, woven elastic fabrics, fabrics that may cause tear transfer and fabrics with high anisotropy. The principle of the falling weight tearing instrument is to raise the pendulum to a certain height so that it has a certain potential energy; when the pendulum swings freely, it uses its own stored energy to tear the sample. The computer control system calculates the energy consumed when tearing the sample, thereby obtaining the force required to tear the sample. There are two principles for fabric tear testing: One is to detect the attenuation of potential energy and calculate the average tearing force, which can be call