Durable nonwoven allergen barrier laminates

A laminate useful as an allergen barrier structure, comprising:

• in order,
• a) a first nonwoven fabric layer comprising fibers made from a first thermoplastic polymer and having a basis weight of at least 15 grams per square meter;
• b) a nonwoven allergen barrier layer having a basis weight of from 6 to 10 grams per square meter and consisting of fibers made from a second thermoplastic polymer and having an average diameter of from 100 to 450 nanometers;
• and
• c) a second nonwoven fabric layer comprising fibers made from a first thermoplastic polymer and having a basis weight of at least 15 grams per square meter;
• wherein the layers a), b), and c) are thermally point-bonded together with a plurality of uniformly spaced thermally bonded points, with the maximum spacing between adjacent bonded points being from 2 to 5 mm;
• and
• wherein the laminate has a filtration efficiency as measured by ASTM F2638-07 after 15 washings of 95 percent or greater for a 1 micrometer particle challenge at up to 1.6 liters per minute airflow.