一、What are the common glass fiber forms, do you know?
At present, glass fiber is widely used. Glass fiber will adopt different forms according to different products, processes and performance requirements of use, so as to meet different use requirements. What are the different forms of common fibreglass composite?
1. Twistless Roving
Untwisted roving is further divided into direct glass fiber roving materials and plied untwisted roving. Direct yarn is a continuous fiber drawn directly from glass melt, also known as single-strand untwisted roving. The plied yarn is the coarse sand made of multiple parallel strands, which is simply the synthesis of multiple strands of direct yarn.
Teach you a little trick, how to quickly distinguish between direct yarn and plied yarn? One strand of yarn is drawn out and shakes quickly. The one that remains is straight yarn, and the one that is dispersed into multiple strands is plied yarn.
2. Bulk yarn
Bulked yarn is made by impacting and perturbing glass fibers with compressed air to separate the fibers in the filament glass fiber and increase the volume, so that it has both the high strength of continuous fibers and the bulkiness of chopped fiberglass.
3. Plaid
Plaid is fibreglass weave cloth. The warp and weft are interlaced at 90° up and down, also known as woven cloth. The strength of the gingham is mainly in the warp and weft directions.
4. Multiaxial Fabric
Fiberglass Multiaxial Fabric is made by weaving glass fiber directly without twisting roving on a multi-axial braiding machine.
The more common angles are 0°, 90°, 45°, -45°, which are divided into unidirectional cloth, biaxial cloth, triaxial cloth and quadriaxial cloth according to the number of layers.
5. Glass fiber mat
Glass fiber matt is collectively referred to as “felt”, a sheet-like product made of continuous strands or chopped strands that are not oriented by chemical binders or mechanical action. Felts are further divided into chopped strand mats, stitched mats, composite mats, continuous mats, surface mats, etc. Main applications: pultrusion, winding, molding, RTM, vacuum introduction, GMT, etc.
6.Ar glass fiber chopped strands
The fiberglass yarn is chopped into strands of a certain length. Main applications: wet chopped (reinforced gypsum, wet thin felt), BMC, etc.
二、what factors will affect the tensile strength of glass fiber
The emergence of float glass technology can be said to provide strong technical support for glass deep processing, and under the guidance of this emerging technology level, the types of glass deep processing have become more abundant, among which glass fiber epoxy composite belongs to many glass deep processing. One of the categories, and glass fiber has been widely used in many industries and fields in modern society since its research and development. So what factors will affect the tensile strength of glass fiber with good service and strength?
The first factor, the diameter of the fiber and the temperature conditions of the environment in which it is used.
In terms of appearance, glass fiber does not seem to be significantly different from ordinary silk thread, but the application range of glass fiber is much wider than that of silk thread. Even so, the tensile strength will have a certain effect on the use effect and overall service life of this material. influences. However, there are many factors that will affect the tensile strength of glass fibers, including the diameter of the fiber itself and the temperature of the environment in which the material is used later. Usually, the thinner the fiber diameter is at a given temperature. The higher the tensile strength.
The second factor, the surface treatment used
Glass fiber is actually produced by using glass as a raw material for deep processing, and special methods are required in the entire production process to realize the transformation from glass to fiber. Among them, chemical treatment methods and migration methods belong to surface treatment methods. one of the. If the chemical treatment method is used during the production, the tensile strength will decrease after the sizing agent is removed by heat treatment, but the tensile strength of fibreglass insulation materials will return to the normal state after the adhesive is used in the middle.
The above content is an analysis of the factors that affect the tensile strength of glass fiber. It can be seen that the diameter of the fiber itself and the temperature of the later use environment will affect the tensile strength of the glass fiber with good service and low price. In addition, the outer surface treatment method used by the glass fiber will also affect the its tensile strength.
#fibreglass composite#direct glass fiber roving materials#chopped fiberglass#fibreglass weave cloth#chopped strand mats#glass fiber epoxy composite
Post time: Oct-21-2022