What is the difference between fiberglass cloth and fiberglass felt for making FRP?

Glass fiber is the main reinforcing material in FRP, the orderly distribution of the fiber of the cloth, resulting in the final force of FRP products also need to consider different directions, glass fiber felt, the direction of the yarn is disordered, and the product FRP is bound to be able to withstand the force added from multiple directions. However, because the fibers become shorter than the longer fibers, the loss of strength is also significant. The specific reinforcement depends on what the FRP parts are and what process is used.

Felts are generally divided into surface felts, continuous felts and chopped felts.

The surface felt, generally in order to improve the surface effect and reduce the impact of the cloth on the surface, is made of fiber precursor spraying;

The difference between continuous felt and chopped felt, as the name suggests, is that the way of molding lies in whether short filaments or continuous filaments are used.

Continuous felt is generally used as a diversion material, and chopped felt will be used a little in the hand lay-up process to increase the interlayer force and use less.

In addition, the felt is made of glue to bond the fiber tows, in the sense that it contains resin.

The felt is made of irregular, disorderly end-cut fiberglass, and the cloth is a regular weave, like clothes.

Fiber cloth, according to the weaving method: commonly used are UD uniaxial (0°), Biax biaxial (+45° -45°), Triax triaxial (+45° 0° -45°), checkered cloth (0° 90°) Now there are also three-dimensional fiber cloth, but it is still in the experimental stage and is not used in the market.

The fiber cloth is usually woven from warp and weft, and the felt is disordered.

There are various types of felt cloth composite felt, and the biggest difference is: 1. The difficulty of operation: felt is the easiest, and composite felt is the most difficult.

2. Cost: For products of the same specification, the cost of felt is larger.

3. Process requirements: the surface layer of FRP is generally felt, and the surface layer is smooth.

It depends on what kind of FRP products you make, fiberglass felt is suitable for lighting boards, fiberglass cloth can make a lot of hand lay-up fiberglass products.

Fiberglass. The difference between cloth and glass fiber felt, glass fiber cloth is a composite material, which is a product of glass drawing process. Fiberglass blankets, mainly fiber and glass drawing products, fiberglass felt are different from fiberglass cloth in appearance and appearance.

Fiberglass blankets are typically large, carpet-like rolls used for automotive and boat projects. It can be used to install speakers in the car.

It can also be used to repair the hull. Fiberglass cloth is smoother to mold and is ideal for waterproofing wood or other resin-bound surfaces. Fiberglass is also used in a variety of home lighting accessories, such as showers and bathtubs.

Most fiberglass mats are fiberglass bodies or kits. The fiberglass filaments in the mat are disorganized and easily intertwined with the fibers of the other mats, so they are glued together. During construction, fiberglass mats are laminated to the desired strength or thickness.

Fiberglass felt is denser than fiberglass cloth. Fiberglass cloth is a layer of braided thread. It is powerful and uniform in appearance, and is used for items where appearance is important.

The woven fiber cloth does not mesh with the fibers of other fiberglass cloth layers.

Glass fiber felt is a strand yarn made of glass fiber precursor chopped, which is randomly and evenly distributed into continuous glass fiber paper pieces by papermaking method and bonded with emulsion. Its main performance and characteristics: chemical corrosion resistance, fire resistance, flame retardant, waterproof, aging resistance, weather resistance, insulation and other characteristics.

It is widely used as FRP base cloth, anti-corrosion, heat preservation, fire retardant, waterproof materials, epoxy copper plate and electrical insulation products.

Medium alkali glass fiber thin felt is suitable for continuous operation of the machine or hand lay-up to make various FRP products, plates, pipes, tanks, tanks, pleasure boats, bathtubs and other products.

Alkali-free glass fiber thin felt is used for epoxy composite copper plate and electrical insulation products.

Alkali fiberglass thin felt is a high-quality material for battery separators, roofing waterproofing, gypsum board protective panels, plastic flooring and chemical pipe lining for anti-leakage and anti-corrosion.

As a gelcoat layer reinforced felt, glass fiber surface felt is an anisotropically distributed fiber, its soft properties make it suitable for edges and corners, irregular shapes and complex curved surfaces, and suitable for a variety of composite material processes, can be quickly soluble with EP, VE, UP and PU resins, forming a resin-rich layer between the fiber voids, giving a smooth and flat surface, effectively avoiding the porosity on the surface after forming and the fiber texture hidden in the fiber. It also highlights the enhanced interlaminar shear strength, surface toughness and excellent chemical and corrosion resistance.

Rock wool and glass wool themselves have the characteristics of sound absorption and heat insulation, so they are often used in the process of construction project decoration. But many people hear about these two materials for the first time and don't know what the specific difference between the two is. Today, Xiaoyou will give you a detailed introduction to the difference between rock wool and glass wool.

1. Rock wool. Rock wool is made by natural rocks such as basalt, gabbro, dolomite, iron ore and bauxite melted into a solution at high temperature and sent to centrifugal equipment, supplemented by other materials in different proportions, made into fibers, and finally shaped, cured, and cut into ordinary insulation materials.

2. Glass wool.

Glass wool is made of centrifugal glass wool felt fibers using centrifugal methods. Glass is used as the main raw material, and then mixed with dolomite, sand-jumping and other auxiliary materials in a certain proportion, and sent to the glass melting furnace for full melting. The melted solution flows out through the sleeve and into the centrifuge.

The high-speed centrifuge drives the glass to be spun into a glass stream, and then uses a high-temperature and high-speed flame to further stretch the glass stream into fibers, and then spray an atomized adhesive. Under the action of negative pressure air in the cotton collection belt, the fibers attached to the resin binder are cooled on the moving belt. A uniform cotton felt is formed, and then the curing process is completed through a constant temperature curing oven, the product is formed, cut into a predetermined product after molding, and then vacuum-packed.

3. The difference between rock wool and glass wool.

1. Different raw materials.

Rock wool is mainly natural rock, glass wool is mainly glass, with dolomite, sandbling and other auxiliary materials.

2. The sound insulation effect is different.

The sound insulation effect of glass wool is better, and the sound insulation effect of glass wool of 24kg m3 is equivalent to that of 80kg m3 of rock wool.

3. Different hydrophobicity.

Glass wool is not easy to break due to soaking and rain, but it is easy to dry spontaneously when soaking, and its characteristics are stable. The rock silk wool collapsed immediately after being soaked by invasion, and many characteristics were missing.

4. Different service life.

The performance of glass wool is stable, because of its inherent slender and soft glass fiber, it generally does not appear chalking, resulting in a sharp decline in performance, and the service life can reach 30 years.

The fiber of the rock wool itself is short and thick, the hardness is large, it is easy to be crushed, after a period of time, it will become slag, and the slag ball phenomenon appears, causing the rock wool fiber to fall off or even disintegrate, forming chalking, affecting the first itch of the construction personnel, and the service life is generally about 10 years.

Fiberglass and glass are actually the same thing, because they are both made of the same substance, but one is a fiber stove made into another thing, and its characteristics are different, which is equivalent to saying that the high stove is a different substance for two stools.

Fiberglass cloth is woven from fiberglass, similar to cloth, glass is transparent glass.

Fiberglass gingham cloth is a non-twisted roving plain weave fabric, which is an important substrate for hand lay-up FRP. The strength of the checkered cloth is mainly in the warp and weft direction of the fabric, for the occasion that requires high warp or weft strength, it can also be woven into a one-way cloth, which can be arranged in the warp or weft direction more untwisted roving, single warp cloth, single weft cloth. Untwisted roving is made by bunching parallel precursors or parallel monofilaments.

According to the composition of the glass, the untwisted roving can be divided into: e-glass alkali-free glass untwisted roving jujube and c-glass medium-alkali glass untwisted roving.

Glass fiber reinforced plastic (FRP), also known as GFRP, is a fiber-reinforced plastic, which generally refers to a matrix of glass fiber reinforced unsaturated polyester, epoxy resin and phenolic resin. Reinforced plastics with glass fiber or its products as reinforcing materials are called glass fiber reinforced plastics, or glass fiber reinforced plastics, which are different from tempered glass.

Due to the different types of resins used, there are polyester FRP, epoxy FRP, phenolic FRP. Light and hard, non-conductive, stable performance, high mechanical strength, less utilization, corrosion resistance. It can be used as a substitute for stool mountain steel to make machine parts and shells for automobiles and ships.

The scientific name of FRP is fiber reinforced plastics, commonly known as FRP (fiber reinforced plastics), that is, fiber reinforced composite plastics. According to the different fibers used, it is divided into glass fiber reinforced composite plastic (GFRP), carbon fiber reinforced composite plastic (CFRP), boron fiber reinforced composite plastic, etc. It is a composite material that uses glass fiber and its products (glass cloth, tape, felt, yarn, etc.) as the reinforcing material and synthetic resin as the matrix material.

Fiber-reinforced composites are composed of reinforcing fibers and a matrix. The diameter of the fiber (or whisker) is very small, generally less than 10 m, the defects are few and small, and the breaking strain is about 30 parts per thousand, which is a brittle material, which is easy to be damaged, broken and corroded. Compared with fibers, the strength and modulus of the matrix are much lower, but it can withstand large strain, and often has viscoelastic and elastoplastic, which is a ductile material.

Glass fiber cloth is made of glass balls or waste glass as raw materials by high-temperature melting, drawing, winding, weaving and other processes, the diameter of its monofilament is a few microns to more than 20 meters microns, equivalent to 1 20-1 5 of a hair, each bundle of fiber precursor is composed of hundreds or even thousands of monofilaments.

1. It is used for low temperature -196 and high temperature between 300 °C, and has weather resistance.

2. Non-adhesive, not easy to adhere to any substance.

3. Chemical corrosion resistance, strong acid, strong alkali, aqua regia and various organic solvents.

4. The friction coefficient is low, and it is the choice of oil-free self-lubrication.

5. The light transmittance is 6 13%.

6. It has high insulation performance, anti-ultraviolet and anti-static.

7. High strength. It has good mechanical properties.

8. Drug resistance.

The effect of fiberglass cloth is like a steel bar, which plays the role of a rib on FRP.

Glass fiber cloth is mostly used in the hand lay-up process, and glass fiber reinforced material checkered cloth is mainly used in hulls, storage tanks, cooling towers, ships, vehicles, tanks, and building structural materials. Fiberglass cloth is mainly used in industry: heat insulation, fire retardant, flame retardant.

The material absorbs a lot of heat when burned by a flame and prevents the flame from passing through and separating the air.

1. According to the composition: mainly medium alkali, no alkali, high alkali (it is a classification of the composition of alkali metal oxides in glass fiber), of course, there are also classifications by other components, but there are too many varieties to list one by one.

2. According to the manufacturing process: crucible drawing and pool kiln drawing. 3. By variety:

There are ply yarns, direct yarns, jet yarns, etc. In addition, it is differentiated by the diameter of the single fiber, the number of tex, the twist, and the type of sizing. The classification of fiberglass cloth is the same as the classification of fiber yarn, in addition to the above, it also includes:

Weaving, grammage, amplitude, etc.

Fiberglass cloth is made of glass drawn into ultra-fine glass filament, and the glass filament has good softness at this time. Glass filament is spun into yarn, which can then be woven into fiberglass cloth through a loom.

The main difference between them is actually not big, but because the production makes about seventy-five materials have different properties, so they have some differences in the formula. The silica content of ordinary glass is generally less than 60 percent, while the content of glass fiber is generally less than 60 percent. Fiberglass cloth is an inorganic material, after more than eight high temperature melting, when he is below the temperature of the softening point, there will be no chemical change, above the softening point, long will only occur soft, dissolved and other phenomena, will not burn, so the danger is low.

Fiberglass cloth is a very fine glass filament, which is made of glass after drawing, after drawing, the glass filament has a strong thermal softness and elasticity. Then you can use a loom to make fiberglass cloth. However, the heat resistance of glass filament is not as good as that of glass cloth, and it is easier to melt because the surface area of the glass filament is too large.

No. In any case, glass will not burn, sometimes the burning phenomenon we see is a process of improving the performance of fiber cloth, glass cloth can be used to make fireproof clothing, firefighting clothing and other products, but it is best not to contact directly, broken glass fiber will sting**, and make people feel itchy.

At the same time, glass fiber cloth is also the main material for making FRP, it is actually a composite plastic, through the use of glass fiber cloth and some other additives after processing and curing. The specifications of fiberglass cloth are generally 250mm, 500m, 1000m, 30mm, and 120mm.