What is chopped strand mat fiberglass?

CHOPPED STRAND MAT

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Chopped Strand Mat, also known as fiberglass mat, has short strands of fibers held together with a resin binder. It is affordable and is often used in mold construction and parts where thickness is needed.

Chopped strand mat can easily be used to conform to tight curves and corners. The randomly oriented fibers give parts equal stiffness in all directions. Mat does not add much strength to a part. If strength and thickness are both needed, it is recommended that the chopped strand mat be used in between layers of woven fiberglass fabric. Layering will also help the fabrics bond well together. Mat is NOT compatible with epoxy resin. The binder that holds the short strands together needs styrene to dissolve properly. Styrene is found in polyester and vinyl ester resin. Fiberglass mat will create a higher weight product. If a lower weight is needed, a fiberglass cloth or knitted fabric should be used.

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5. Chopped Strand Mat: 1 1/2 ounce

Details

Build Quick Thickness for Parts

1.5 oz/sq ft, 38" & 50" Wide, 0.045" Thick

Chopped Strand Mat is most frequently used with polyester resin to quickly build thickness for parts and between layers of fabric for building molds. It can be used alone or in conjunction with fiberglass fabrics, or woven roving, in larger fabrications.

Fabricators generally tear apart Chopped Strand Mat, rather than cut it. This maintains the length of fibers along the torn edge, which create stronger bonds with subsequent layers.

Chopped Strand Mat contains a binder which holds strands together, but prevents proper bonding with any epoxy resins. PLEASE NOTE: It is only compatible with polyester or vinyl ester resins.

For convenience, mat is also sold in 4-inch-wide tape form (#492).

For 38-inch, typical full roll length is 80 yards.

For 50-inch, typical full roll length is 87 yards.

Shipping

Folded prepacks are typically shipped in a small box, or packaged in a box with other items on your order. Chopped Strand Mat ships in a long (45", 53", or 62") box. Click below on the "What to expect when you order Fabric" video to see how rolled fabrics are cut and shipped each time you order.

Sizes

Chopped Strand Mat This mat is sold by the linear yard, either as a prepackaged quantity or by continuous yardage. Prepacks This mat is available in pre-cut lengths that measure one yard (#250-A & #-A, folded package), three yards (#250-B & #-B, roll), and five yards (#250-C & #-C, roll). Each is packaged and sold separately. For your convenience, these "prepacks" can be purchased in any combination. However, if the length for this mat totals 10 yards or more, we suggest you purchase it in continuous, "cut to length" yardage. Continuous, "Cut to Length" Yardage If you know in advance that you intend to purchase 10 yards or more of mat, it should be ordered in continuous, "cut to length" yardage. In this case, mat will be cut once according to the total yardage ordered, and customers receive a price-per-yard discount as compared to prepacks. Quantity discounts continue to deepen as the yardage increases for any one cut of this mat.

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