Hot extraction paper

Abstract

A water vapour-permeable and hot water-resistant paper made substantially of cellulose and of manufacturing additives required for cellulose production, such as pH-value adjusting agents based on acids and/or bases, the paper exclusively contains cellulose with fibre lengths of at least 2.0 mm as a length-weighted mean, in particular of at least 2.5 mm as a length-weighted mean, wherein the cellulose forming the paper is a cellulose ground to a consistency of 30-35% by high-consistency grinding and possibly to a consistency of 4-6% by low-consistency grinding, a proportion of fines in the paper is set at values smaller than 6.5% and the pH value is set in the pseudo-neutral range, in particular at values under 7.5, preferably at values between 6.6 and 7.4, and an elongation of the paper in the machine direction is ≤3%.

Dependencies are inferred from the claim text.