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Tyvek®, is a product of DuPont de Nemours, made out of HDPE (high density polyethilene), compounded by randomly distributed fibers then spunbonded. In general, there are two different types of Tyvek ®, Tyvek paper, and Tyvek fabric, usually called styles 10 and 14 respectively.
The difference between each other is the type of "ironing" (spunbonding). While the tyvek paper is ironed across all its surface, and no fibers remain unironed, tyvek fabric is point welded or point ironed. Only certain points are welded, and the rest remains unbonded, giving it the fabric appearance.
Besides the ironing time determines different mechanical properties for the same material. The more ironing, the harder binding of the fibers, and the more Tyvek simulates a film. The less ironing, more fibers remain unwelded, and Tyvek preserves more characteristics of a fabric.
It is very important to determine which Tyvek should we use, because sometimes we are seeking tensile strength and sometimes we are pursuing a higher tear Elmendorf.
Our products can be classified into the following categories:
