Kraft Paper - Qualities

Qualities

  • Normal kraft paper is strong and relatively coarse. It has high tensile strength. The grammage is normally from 40–135 g/m2.
  • Sack kraft paper, or just sack paper is a porous kraft paper with high elasticity and high tear resistance, designed for packaging products with high demands for strength and durability.
  • Absorbent kraft paper is made with controlled absorbency, i.e., a high degree of porosity. It is made of clean low kappa hardwood kraft and has to have a good uniformity and formation.
  • Spinning kraft paper is an especially strong type of kraft paper with relatively low grammage (40 g/m2). This paper requires the best possible machine direction strength and cross machine elongation. This is done by high fiber orientation on the papermachine.
  • Hunting cartridge paper is a kraft paper used in shotgun shells. This paper needs a high tensile strength in the machine direction, which is the axial direction of the cartridges. In the cross direction, the cartridge is supported by the gun-pipe, but a sufficient elongation is needed. The body of the cartridge is wound of a kraft paper of 80–120 g/m2, which is further covered by an outer sheet of 60–80 g/m2 with colour and printing.
  • Candy wrapping paper or twisting paper are thin 30–40 g/m2 kraft papers and is mostly flexo or offset printed. These papers requires a good strength, with highly oriented fibers. Twisting paper is mostly opaque and often supercalendered.

Read more about this topic:  Kraft Paper

Famous quotes containing the word qualities:

    “I am less disposed to think of a West Point education as requisite for this business than I was at first. Good sense and energy are the qualities required.”
    —Rutherford Birchard Hayes (1822–1893)

    “Men insist that they don’t mind women succeeding so long as they retain their “femininity”. Yet the qualities that men consider “feminine”Mtimidity, submissiveness, obedience, silliness, and self-debasement—are the very qualities best guaranteed to assure the defeat of even the most gifted aspirant.”
    —Elizabeth Gould Davis (b. 1910)

    “I should say tact was worth much more than wealth as a road to leadership.... I mean that subtle apprehension which teaches a person how to do and say the right thing at the right time. It coexists with very ordinary qualities, and yet many great geniuses are without it. Of all human qualities I consider it the most convenient—not always the highest; yet I would rather have it than many more shining qualities.”
    —M. E. W. Sherwood (1826–1903)