The non-wood pulps have a fiber length greater than about 1.70 mm and a porosity of about 100 cfm or greater. The relatively high degree of porosity is achieved without a loss in tensile strengths. The high degree of porosity and strength makes the pulps well suited for the manufacture of wet-laid fibrous products, particularly wet-laid tissue products. The pulps may be prepared from plants of the family Asparagaceae by mechanical pulping and more preferably by a chemi-mechanical pulping using a sodium hydroxide alkaline peroxide solution where the plant biomass is cut to size prior to pulping.

A reusable, fiber containing pulp product is described that is highly suited for use in the manufacture of paper products. The reusable, fiber containing pulp product provides a mixture of fibers and small, dense polymer/particle fragments. The polymer/particle fragments within the reusable, fiber containing pulp product have a size range and density that facilitates efficient removal of the polymer/particle fragments using pressure screens.

The present invention relates to a crumple-resistant security sheet comprising fibers; an anionic polymer in a proportion lying in the range 5% to 45% by dry weight relative to the total dry weight of the fibers, and presenting a glass transition temperature greater than 40 C.; and a main cationic flocculation agent in a quantity lying in the range 1% to 5% by dry weight relative to the total dry weight of the fibers.

Belts and fibrous structures may include discrete cells including one or more legs and/or one or more concavities in certain patterns or Cell Groups. The cells may be discrete knuckles or pillows and the fibrous structures may further include an emboss.

The invention concerns a powder of fragments of at least one polymeric nanofiber which fragments have a maximal average length of 0.12 mm.

The invention concerns a powder of fragments of at least one polymeric nanofiber which fragments have a maximal average length of 0.12 mm.

The invention relates to a supercalendered Kraft paper production for a release liner, which contains both non-recycled bleached chemical pulps and recycled pulp produced from release liner supercalendered Kraft paper. When highly specific raw material is used for recycling, the characteristics of the recycled pulp may be adjusted already upon recycling. The recycled pulp obtained from supercalendered Kraft paper that has been used as a substrate of a release liner may be used without further refining for manufacturing supercalendered Kraft paper. Excessive refining can thus be avoided and the compatibility of the recycled pulp may be optimized for supercalendered Kraft paper production. The non-recycled pulps may be refined less, as well. This leads to positive effects in supercalendered Kraft paper manufacturing process, such as improved dewatering and energy efficient drying. The produced paper demonstrates reduced shrinkage and improved dimensional stability, while maintaining sufficient quality for use as a substrate for a release liner. A supercalendered Kraft paper with improved sustainability is produced.

A reusable, fiber containing pulp product is described that is highly suited for use in the manufacture of paper products. The reusable, fiber containing pulp product provides a mixture of fibers and small, dense polymer/particle fragments. The polymer/particle fragments within the reusable, fiber containing pulp product have a size range and density that facilitates efficient removal of the polymer/particle fragments using pressure screens.

A packaging material consisting of an unbleached kraft paper as a base paper, the kraft paper has at least 90% primary cellulose and a grammage of between 65 g/m.sup.2 and 170 g/m.sup.2; the primary cellulose, containing at least 80% cellulose with a length-weighted mean fiber length of between 2.0 mm and 2.9 mm, and less than 5% fillers, the primary cellulose is cellulose beaten with high consistency, the packaging material has a strain ratio break of >1.1, a tear length in the machine direction of >10 km, and a tear index in the cross direction of >16.0 mN.Math.m.sup.2/g. The invention also relates to a method for manufacturing the packaging material, to a sleeve produced from the packaging material, and to a use of the packaging material.

A packaging material consisting of an unbleached kraft paper as a base paper, the kraft paper has at least 90% primary cellulose and a grammage of between 65 g/m.sup.2 and 170 g/m.sup.2; the primary cellulose, containing at least 80% cellulose with a length-weighted mean fiber length of between 2.0 mm and 2.9 mm, and less than 5% fillers, the primary cellulose is cellulose beaten with high consistency, the packaging material has a strain ratio break of >1.1, a tear length in the machine direction of >10 km, and a tear index in the cross direction of >16.0 mN.Math.m.sup.2/g. The invention also relates to a method for manufacturing the packaging material, to a sleeve produced from the packaging material, and to a use of the packaging material.