Aramid cloth, namely Kevlar cloth, aramid fiber cloth, aramid fabric, is a kind of cloth with insulation and insulation.
The main varieties are as follows
1. Aramid fiber roving fabric, mainly made of aramid 1414 filament, which is made up of parallel strands
or parallel monofilaments. The aramid fibers used in the production of the roving have a monofilament
diameter ranging from 5 to 15 μm. The number of rovings is from 100 to 8000 (tex). The roving can be
directly used in some composite material forming methods, such as special textile, sheet prepreg, pipe
winding, profile pultrusion, etc. The yarn with no twistiness can be woven into no upset due to its uniform
tension. Gauze and special aramid fabrics are used in special industries such as aerospace, defense, and
Mainly low-weight aramid cloth plain fabric, one of bulletproof fabrics; aramid non-woven fabric, namely
UD bulletproof fabric; aramid unidirectional fabric, used for high strength in single direction of 0 degree or
90 degree latitude Occasionally, such as structural repair, seismic reinforcement, building reinforcement,
bridge reinforcement, etc.; decorative aramid fabric can also be woven into twill aramid fabric and colored
2, aramid non-woven fabric, mat, aramid paper, used for insulation
3, aramid fiber twisted gauze, aramid fabric, aramid fabric, mainly with aramid 1313 or a small amount of
1414 staple fiber
(1) Aramid fiber twisted gauze mainly refers to various fabrics which are woven with aramid 1313 or a
small amount of 1414 staple fiber yarn. Mainly used in fire retardant and other fields. The properties of the
fabric are determined by fiber properties, warp and weft density, yarn structure and texture. The warp and
weft density is determined by the yarn structure and texture. The warp and weft density plus the yarn
structure determines the physical properties of the fabric, such as weight, thickness and breaking strength.
There are five basic textures: plain, twill, satin, rib and mat.
(2) Aramid twisted webbing is divided into a woven side belt (light side belt) and a non-woven side belt
(burr belt). The main weave is plain weave. It is used to manufacture high-strength, dielectric-good electrical
equipment parts and automotive hoses.
(3) Aramid cord fabric, which is a twisted aramid unidirectional fabric dipped, is characterized by high
strength in the warp yarn 0 degree or the weft yarn 90 degree direction. The warp unidirectional fabric is a
four-striped or long-satin satin fabric woven from coarse warp yarns and fine weft yarns for aircraft tires and
premium automobile tires.
(4) Three-dimensional fabric Three-dimensional fabric is a relatively flat fabric, and its structural features
have evolved from one-dimensional two-dimensional to three-dimensional, so that the composite material
with the reinforcement has good integrity and profiling, and greatly improves the composite. Interlaminar
shear strength and damage tolerance of the material. It has been developed with the special needs of
aerospace, aviation, weapons, ships and other departments, and its application has been extended to the
automotive, sports equipment, medical equipment and other departments. There are five main categories:
woven three-dimensional fabrics, knitted three-dimensional fabrics, orthogonal and non-orthogonal
nonwoven three-dimensional fabrics, three-dimensional woven fabrics, and other forms of three-dimensional
fabrics. The shape of the three-dimensional fabric has a block shape, a column shape, a tubular shape, a
hollow truncated cone, and a variable thickness profiled section.
(5) The shape of the profiled fabric is very similar to the shape of the article to be reinforced, and must be
woven on a dedicated loom. Shaped fabrics of symmetrical shape are: round caps, cones, caps, dumbbell-
shaped fabrics, etc., and can also be made into asymmetrical shapes such as boxes and hulls.
(6) Grooved core fabric The core fabric is a fabric composed of two parallel fabrics joined by longitudinal
vertical strips, and the cross-sectional shape may be triangular or rectangular.
(7) The stitchbonded fabric is also referred to as a knitted felt or a woven felt, which is different from the
ordinary fabric and the felt of the usual meaning. The most typical stitchbonded fabric is a layer of warp
yarns which are overlapped with a layer of weft yarns, and the warp yarns and the weft yarns are woven
together into a fabric by stitching.
3, combined aramid cloth
That is, an aramid composite cloth in which aramid felt, aramid roving fabric and aramid roving are combined
in a certain order.
Aramid cloth characteristics
1. Good mechanical properties Meta-aramid is a flexible polymer with higher breaking strength than ordinary
polyester, cotton, nylon, etc. It has large elongation, soft handfeel and good spinnability, and can be
produced into different denier and length. The short fibers and filaments are woven into fabrics and non-
woven fabrics in different textile machinery. After finishing, they meet the requirements of protective clothing
in different fields.
2, excellent flame retardant, heat resistance meta-aramid has a limiting oxygen index (LOI) greater than 28,
so it does not continue to burn when it leaves the flame. The flame retardant properties of meta-aramid are
determined by its own chemical structure. The decision is therefore a permanent flame retardant fiber that
does not reduce or lose flame retardant properties due to time of use and number of washes. The meta-
aramid has good thermal stability and can be used continuously at 300 ° C. It can maintain high strength
even at temperatures above 300 ° C. The meta-aramid has a high decomposition temperature and It does
not melt or melt under high temperature conditions, and carbonization starts when the temperature is higher
than 580 °C.
3, stable chemical properties Meta-aramid has excellent resistance to most chemical substances, can
withstand most high-concentration inorganic acids, and has good alkali resistance at room temperature.
4, radiation resistance meta-aramid has excellent radiation resistance. For example, under the long-term
irradiation of 1.2×10-2 w/in2 ultraviolet rays and 1.72×108 rads of γ-rays, the intensity remains unchanged.
5, Durability Inter-aramid excellent anti-friction and chemical resistance, after 100 times of washing, the
interfacial aramid processed fabric tearing strength can still reach more than 85% of the original strength.
High temperature resistance, fire retardant, light weight, high strength, high modulus, stable size, low
shrinkage, puncture resistance, cut resistance, wear resistance, heat resistance, chemical resistance, good
mechanical properties, dielectric properties Good and so on.