Multiwall Papers

We offer a variety of multiwall substrate options to deliver operational and functional performance for multiwall shipping sacks. 

Our multiwall substrates include converting kraft, Uniform Freight Classification (UFC) Rule 40 multiwall, and wet strength grades.

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ReliaKraft® Multiwall

Made from virgin fiber, our ReliaKraft® multiwall paper substrates comply with U.S. Freight Classification Rule 40 requirements where applicable and are offered in basis weights from 40 lb to 60 lb.

Clean and consistent fiber: Our quality control standards and processes ensure product consistency, and all our North American kraft paper mills are ISO 9001:2015 certified.
Quality and durability: ReliaKraft multiwall delivers superior strength along with uniform ink absorption and appearance.
Applications: Shipping sacks for minerals, powdered chemicals, and construction materials, as well as feed and seed bags, dairy bags, and bags for sugar or other granular products.

ReliaKraft® Multiwall Wet Strength

ReliaKraft® Multiwall Wet Strength has all the benefits of ReliaKraft® Multiwall with the addition of wet strength resin that enables the paper to retain strength in humid and wet conditions.

Moisture resistance: Delivers excellent performance in wet and moist environments.
Print-friendly surface: The low lint smooth surface is excellent for printing.
Reliable performance: Our ReliaKraft wet strength multiwall delivers consistent and reliable converting and performance.
Sustainable: Made from renewable and responsibly sourced paper fiber.

ReliaKraft® Converting Kraft

Smurfit Westrock’s quality converting kraft paper is engineered for your converting needs. With consistent quality and a smooth surface, ReliaKraft® Converting is offered in natural kraft for use in a variety of converting applications.

Clean and consistent fiber: Our quality control standards and processes ensure product consistency, and all our North American kraft paper mills are ISO 9001:2015 certified.
Superior strength: These durable papers are designed to meet the demands of converting operations and end-use applications.
Range of paper grades: Our ReliaKraft® Converting Kraft comes in basis weights ranging from 40 lb. to 80 lb.