Understanding Glass Scrim

There are many different options in the materials used to produce scrim. Scrim is the layer of flexible support material that is used in packing, backings, fabrics and other types of materials.

Scrim, regardless of the material it is produced with, looks like a mesh. It can be very open or more densely packed, but it is always highly uniform in its shape. A nonwoven type of glass scrim is perfectly flat on either surface and also features the individual yarns that are straight throughout the length and width of the product.

The advantage to the very flat laid or nonwoven scrim over a woven material is that it can support a thin surface material without any surface irregularities. With a woven scrim with the traditional over and under pattern, there is a more irregular surface, which requires a thicker fabric or material to eliminate irregularities in the smoothness of the material.

Glass as a Material

Two common types of materials used to create the yarns in a scrim are polyester and glass fibers. These yarns are chemically treated to bond with each other in the manufacturing process. This bonding creates a durable, strong and resistant point of attachment between the yarns running across and the length of the scrim. This connection or bond is always at a perfect 90-degree angle which provides maximum strength as well as flexibility.

Glass scrim is often used with plastics. It is a good option for sound insulation types of products and materials and can also be an important consideration when fire resistant and retardant materials are required.

Glass fibers are commonly used in scrim that is used in the automotive industry, particularly in the development of materials for filters. Specific types of molded parts can also benefit from the added strength that comes from using scrim as an interior reinforcing material within the mold.

The Advantages

The laid or nonwoven types of glass scrim designs are considerably lighter and thinner than woven counterparts. This can result in a final product that is as much as 40% thinner once the top and bottom materials are bonded to the scrim.

Highly durable and resistant to tearing and wear, even on edges or over surfaces that are not flat, the durability of this scrim sets it apart from other options. The glass fibers can be very quickly bonded and rolled, helping to decrease the cost per unit of production and make the product cost effective for a very wide range of applications.

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