Introduce the mechanical properties of textile fibers

1 Jun

The mechanical properties of textile fibers include fiber strength, elongation, elasticity, abrasion resistance, modulus of elasticity.
Fiber strength: fiber strength is the ability of fiber resistance to external damage, which largely determine the durability of the textile goods.
Fiber strength is the absolute strength fibers to said fibers in a row it is under increasing load until fracture can bear the maximum load. Lecturer in units of its statutory Newton (N) or PCT Newton (cN). Over the past practice of using chocolate or kilograms force said.
Fiber strength with the thickness of fiber is related to the different thickness of the fiber so absolutely not comparable strength, so often used to indicate the relative strength of the fiber strength. Relative intensity is the unit linear density (per special or every once) fibers can bear the greatest tension. Legal units of measurement for the cow / special (N / tex), or determining cattle / Special (cN / tex). Over the past practice of using Chris / Dan said.

Ceramic Fiber , Glass Fiber, Dusted Asbestos , Carbon Fiber
Elastic fibers: fiber and its products in the processing and use, should be subjected to external forces, and generate a corresponding deformation. When the external forces removed, the fiber part of the recoverable deformation, while the other part of the deformation is not recovered. This characteristic of the fiber can be deformed into fibers into three parts, namely, when the external force can be resumed immediately after the removal of this part of the elastic deformation of said emergency; when the force removed, can be slow to recover this part of the deformation said the slow elastic deformation; when the force removed, can not restore this part of the deformation of said plastic deformation.
Elastic fiber refers to fiber deformation recovery. That the size of the common indicators of fiber elastic fiber elastic recovery is also known as spring rate. It is urgent elastic deformation and elastic deformation of a certain period of slow deformation of the percentage of the total.
Elastic recovery rate of the fiber, the fiber with good elasticity, deformation and strong recovery. Fiber with good elasticity, good dimensional stability of textile, the process of taking the easy wrinkle, and more wearable. Such as: polyester has excellent flexibility, and its clothing is made with crisp, wear characteristics.
The wear resistance of fiber: fiber and its products in the processing and actual use, due to the constant friction caused by wear and tear experienced. The wear resistance of fiber refers to fiber external abrasion resistance performance.
Fiber abrasion fastness its textile products are closely related. Wear clothing with the merits of the fabric is an important indicator of wearability. Wear resistance of the fiber and fiber molecular structure, supramolecular structure, elongation, elasticity and other factors. Common level of fiber wear the following order:
Nylon> PP> PVA> Polyethylene> polyester> Acrylic> polyvinyl chloride fiber> wool> silk> cotton> linen> prosperity fiber> copper ammonia fiber> rayon fibers> acetate> glass fiber.
The elastic modulus of fiber: fiber elastic modulus, also known as “initial modulus – it is the start of a tensile curve of the straight part of the stress and strain ratio. In the actual calculation, is generally preferable to extend the load elongation curve rate of 1% of a long point to obtain the elastic modulus of fiber.
The size of the elastic modulus fibers, said fibers under load in a small degree of difficulty, which reflects the rigidity of the fiber, and is closely related with the performance of the fabric. When other conditions are the same, the fiber elastic modulus, the fabric stiffness; the other hand, elastic modulus is small, the fabric soft.
Twist is to make the yarn a relatively rotating the two sections, when the sliver of the original fiber axis parallel to the yarn into a helix tilt. Of short fibers, the twisting is mainly to improve the strength of the yarn. The filament yarn twisting can enhance the strength, but also have some effect. The amount of yarn twist and the twist in the yarn in the fabric and twist to the match, the appearance and performance of the product has a greater impact.
Twisting nature of the indicators are: that the degree of twist twisting, twisting the twist factor and that the direction of twist.
Filament yarn twist angle of twist for a twist to reverse the circle. Unit length of yarn twist within the twist a few said. China’s cotton twist yarn with special number system, which uses a 10cm length of yarn, said the number of twist; combed yarn and filament count is the metric system of twist, that is, the twist per meter number representation; In addition, with the number of twist per inch count, said the British system of twist.
Twist factor can not be used to compare the different thickness of the twist yarn twist level, as the same twist, coarse yarn greater than the tilt of its fiber thin gauze. In actual production, the twist factor used to represent the degree of twisting yarn. Twist factor is a combination of twisting the yarn linear density, said the relative degree of value, can be used to compare the thickness of the yarn twist level. According to the yarn twist factor and yarn twist and linear density calculations obtained.
Twist is the twist to the yarn twisting, the yarn of the fiber or yarn strands presented in the tilt direction. It was divided into two kinds of Z twist and S twist.Z-line is called the middle or backhand twist Z twist. Z twist yarn often used generally, the stock line with S twist.
Strand twist by twisting the twist has always said. For example, Z-twist yarn, first for the S twist twist, twist multiple strands twisted to Z, the twist to ZSZ said.
Twist yarn fabric look and feel of great influence, the use of warp and weft yarn twist and fabric to match, can be woven out of the look, feel and other styles of fabrics.
Hygroscopic textile fibers on the air, will continue the exchange of water vapor and air, that textile fibers absorbing the moisture in the air, but also continue to release water vapor into the air. Textile fibers to absorb or release water vapor in the performance of moisture known as fiber.
Hygroscopic textile fibers is an important physical properties of textile fibers is one. The size of hygroscopic textile fibers form the textile fiber size, weight, physical and mechanical properties have some effect, thus affecting the processing and performance. Moisture absorption capacity of textile fibers also directly affect the size of the fabric take comfort level. Moisture absorption capacity of the fiber is easy to absorb a large human sweat to regulate body temperature, nausea feeling to lift the wet, so people feel comfortable. So in commercial trade, fiber properties, the choice of textile processing and textile fibers in the moisture absorption should pay attention.
In the common textile fibers, wool, linen, viscose fiber, silk, cotton, and other moisture resistant and moisture absorption capacity of synthetic fibers are generally poor, in which the moisture absorption capacity of PVA slightly better and nylon, acrylic or worse, worse polyester , polypropylene and polyvinyl chloride fiber is almost no moisture absorption. Currently, often the poor moisture absorption ability of synthetic fibers and natural fiber or viscose fibers, to improve the fabric of the moisture capacity.
Moisture absorption in fiber, in addition to moisture absorption, the absorbent fiber material is also comfortable with taking the fabric is closely related. Absorbent fiber is the fiber sorption properties of liquid water. People in the activities generated by water vapor and sweat, the main leader of Moisture Absorption and water absorption, the absorption and dissipates, so people feel comfortable. In general, mainly due to rain coat soaked, so choose a small absorbent fiber material for the coat; underwear are mainly due to the non-dominant body evaporation and sweat soaked, so to choose a large moisture and water absorption fiber materials for underwear.

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