Sharing Common Weights And Applications Of
Fiberglass mat, as a core composite material substrate for lightweight, insulating, and corrosion-resistant products, is widely used in various fields such as corrosion and waterproofing, electrical insulation, new energy, filtration and sound insulation, building decoration, and fiberglass products. In actual procurement, product selection, and production, basis weight is a key indicator for measuring fiberglass mat specifications, determining product performance, and matching application scenarios. It directly determines material thickness, tensile strength, impregnation speed, coverage, and finished product lifespan.
Many customers encounter problems such as incorrect material selection, cost waste, and low finished product compliance rates due to a lack of understanding of the standard basis weight ranges for different types of fiberglass mat. To help everyone accurately select materials, standardize procurement, and optimize production processes, this article integrates mainstream fiberglass mat models, systematically summarizes commonly used basis weight parameters for various products, and provides scenario adaptation instructions. Packed with practical information, it is suitable for reference.
Fiberglass mat is a non-woven composite material made from alkali-free glass fibers through chopping, dispersion, web formation, bonding, and curing. Based on raw material composition, production process, and application scenario, it can be divided into several categories, including anti-corrosion roofing mat, electrical insulation mat, lithium battery separator base mat, filter fiberglass mat, surface-coated mat, and sound insulation mat. The weight classification of different categories follows strict industry standards.
Firstly, there is fiberglass anti-corrosion mat, which is the most commonly used basic type for industrial anti-corrosion, roof waterproofing, and pipeline anti-corrosion. This type of mat has good flexibility, resistance to acid and alkali corrosion, and excellent cost-effectiveness, with a wide range of commonly used weights. Ultra-low grammage models are primarily used for surface coating and gap filling, with mainstream specifications of 30g/㎡ and 40g/㎡. General engineering standard models are mainly 50g/㎡, 60g/㎡, and 80g/㎡, suitable for fiberglass anti-corrosion flooring and external anti-corrosion of chemical pipelines. For heavy-duty anti-corrosion and high-strength applications such as tank linings, thicker models of 100g/㎡, 120g/㎡, and 150g/㎡ are used to improve tear resistance and resin load-bearing capacity.
Secondly, there are alkali-free fiberglass electrical insulation felts, featuring high insulation, low dielectric loss, and high temperature resistance, mainly used in electrical fields such as transformers, motors, insulation boards, and circuit board accessories. Electrical-grade fiberglass felt generally features a finer basis weight. Low-basis-weight ultra-thin models (20g/㎡, 25g/㎡, 30g/㎡) are suitable for precision electronic insulation coating. Mid-range general-purpose insulation models are concentrated at 40g/㎡, 50g/㎡, and 60g/㎡, which are standard for mass production of electrical insulation components. For high-voltage insulation and high-temperature applications, thicker insulation felts (80g/㎡, 100g/㎡) are used to ensure stability under high-voltage conditions.
Battery-grade fiberglass felt, popular in the new energy sector, has extremely high requirements for basis weight uniformity and fiber fineness. It is mainly used in lithium battery separators, energy storage battery thermal insulation buffers, and electrode isolation. This category focuses on thinness and lightness, with commonly used basis weights of 15g/㎡, 20g/㎡, 25g/㎡, and 30g/㎡. The basis weight error must be controlled within ±1g/㎡ to avoid uneven thickness affecting battery permeability and thermal insulation performance. This is a core reference parameter for new energy material selection.
Specialized fiberglass surface mat and wall-covering mats for the construction and decoration industries emphasize surface smoothness, crack prevention, and aging resistance. For wall crack prevention and gypsum board cladding, 35g/㎡ and 45g/㎡ weights are commonly used. For leveling artificial marble and fiberglass products, standard weights are 50g/㎡ and 60g/㎡, effectively covering the substrate texture and improving the smoothness and weather resistance of the finished surface.
In addition, industrial filter fiberglass mats and sound insulation/vibration damping fiberglass mats also have fixed weight standards. Air filtration and dust purification mats commonly use 40g/㎡ to 70g/㎡; for automotive interiors and equipment sound insulation and noise reduction, 80g/㎡, 100g/㎡, and 120g/㎡ are often chosen, relying on increased fiber density to enhance sound absorption and vibration damping performance.
For fiberglass mat, a higher weight is not necessarily better; it must be matched to actual needs. Low-grammage thin felts offer good air permeability and rapid resin impregnation, making them suitable for thin-layer coating and precise construction. High-grammage products, on the other hand, offer greater thickness and structural strength, making them suitable for heavy-duty corrosion protection and structural reinforcement applications. Furthermore, at the same grammage, alkali-free fiberglass felt exhibits superior overall performance compared to medium-alkali fiberglass felt, allowing for a more informed choice based on budget and work conditions.
