Sack kraft

These may be used for bulk excipients where there is no risk to or from the environment, e.g. chalk. They comprise two to six plies of sack Kraft types of paper, with possibly LDPE coated or metallised paper or one ply of LDPE in the case of composite sacks. The sacks may or may not have a gusset. They will all be either stitched or glued at the base and usually stitched to close the open mouth. 

Case B Retrofitting of Existing Refiners of a Paper Machine to Switch from Flat to Semi-extendable Sack Kraft Papers... 

In this case, the paper machine manufactures flat sack kraft paper from a blend of virgin pine (long-fibre) kraft pulp with typical Kappa range of 55-65 and eucalyptus (short-fibre) neutral sulfite semi-chemical (NSSC) pulp. The most important properties for sack papers are stretch and tensile energy absorption (TEA) in both cross direction (CD) and machine direction (MD). The major problems with the quality of sack papers currently made on this machine were poor stretch and TEA profile in fhe cross direction as shown in... 

Figure 13.33 Layout of retrofitted refining system for semi-extensible sack kraft paper. Table 13.5 Effect of HC and LC refining on fibres for sack papers.

Retrofitting of the existing double-disc refiner used to refine unbleached long-fibre Pinus radiata kraft pulp to make flat sack kraft paper by an HC refining system followed by LC refining enabled the mill to manufacture premium-grade semi-extensible sack kraft papers... 

The combined effects of retrofitting of the refining system and the dryer hood of the sack kraft machine delivered significant improvement in the cross directional profiles and absolute values of the two key properties of sack kraft papers, namely CD stretch and CD TEA. 

A cross-sectional view of kenaf is shown in Figure 3d. The ultimate cells are nearly cylindrical with thick cell walls. Kenaf fibers are shorter and coarser than those of jute. Both chemical (kraft) and mechanical pulps have been produced from kenaf, and successful demonstration mns of newsprint have been made for the Dallas Morning Nem, the St. Petersburg Times, and the Bakersfield Californian with a furnish of 82% kenaf chemithermomechanical pulp and 18% softwood kraft pulp. Kenaf fiber is also considered a substitute for jute and used in sacking, rope, twine, bags, and as papermaking pulp in India, Thailand, and the former Yugoslavia. RoseUe bleached pulp is marketed in Thailand. 

MultiwaU. shipping sacks are suitable for transport in aU kinds of carriers from tmcks to seafaring vessels. Particular care must be taken to prevent the storage of objects with sharp projections adjacent to the bags in case of doubt, it is advisable to line the enclosure with kraft paper of a basis weight >23 kg. Additional rules for the transportation of multiwaU sacks are contained in appHcable tariff specifications and should be consulted for rail, tmck, and ocean-going shipments. 

Kraft MD, Btaiche IF, Sacks GS, Kudsk KA. Treatment of electrolyte disorders in adult patients in the intensive care unit. Am J Health-Syst Pharm 2005 62 1663-1682. 

Kraft 11-13 Na+,(Na2S) 1. Unbleached—packaging materials boxboard, sack, and bag papers 2. Semibleached—newsprint (25-35%) 3. Bleached—high quality papers of all types... 

Used particularly for paper, plastic and composite sacks. With paper sacks use a creped Kraft paper on the outside ply. Even with dusty materials this increases the coefficient of friction of the contact areas, thereby reducing the chances of unwanted movement of one sack over another. Other treatments of paper use colloidal silica or compounds containing alumina. 

Corrugating medium Lmerboard Kraft sack paper Fine paper Newsprint... 

Comparing another common polymer, polyethylene (PE) used for grocery bags as compared to kraft paper reveals the followings—PE sacks use 20% to 40% less energy than the paper, create 74% to 80% less solid waste by volume and have 63% to 73% less atmospheric emissions. Both PE and PS... 

Paper sacks for cement are generally of two-ply construction, consisting of kraft paper made from soda pulp, each ply having a weight of 90-100 g/m. For rough handling conditions, sacks with three, four or five plies may be used. 

Kraft sack paper (60-115 g m ), bleached and unbleached, includes kraft bag asphalt base paper which is used in the production of asphalt paper. 

Extensible kraft sack paper [Clupak) corresponds to the kraft sack papers. It has a higher elongation (> 6%) in the longitudinal direction. It can also be used as base paper for plastic coating (45-350 g m ). 

Secondary kraft sack paper (70-350 g nr ) is made from at least 50% unbleached kraft primary fibers. 

The pulp produced by the kraft process is widely used throughout the paper and board industries. Unbleached kraft is used for grocery sacks, wrapping papers, raw material packaging, and linerboard for corrugated boxes. Bleached kraft pulps are used for printing and writing papers, sanitary tissue, and bleached paperboard. 

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