Abstract:
A process for producing bleached lignocellulosic pulp for use in the pulp and paper industry having reduced total organically bound chlorine and reduced brightness reversion. Lignocellulosic pulp is subjected to one or more xylanase treatment stages, in combination with one or more chemical bleaching stages.
Abstract:
An apparatus and method for manufacturing cut products in continuous roll form includes input feeds (10, 11) for supplying a continuous web of product material and a continuous transport web in parallel, feed rollers (16, 18) for incrementally advancing the two webs together to and from a cutting station (17) where product units are cut in successive increments in a continuous strip, a scrap remover (19a, 19b) and a station (20a, 20b, 20c) for winding up the cut product strip. The webs are unwound and the cut product strip is wound via dancer bars (12, 13, 29a, 29b, 29c) maintaining constant tension. The input webs have a width which is a multiple of the width of the product units so that multiple strips can be formed simultaneously. The apparatus is particularly used to form floppy disk liners (30) having connecting portions (32a, 32b) and indented cut outs (33, 34) marking the boundaries between units. The cut outs are overcut in the cross and machine directions in order to obtain clean cuts between product units despite slight variations in registration.
Abstract:
A zone treated spunbonded/meltblown/spunbonded (SMS) or spunbonded/spunbonded (SS) fabric laminate (2') that combines the separate functions of the topsheet and cuff in one component of an absorbent article. The SMS fabric laminate is treated with surfactant to form one or more hydrophilic zones (A, B or C). The untreated areas of the fabric laminate remain hydrophobic and perform the function of the cuff. The fabric laminate is treated with surfactant on both sides using a foam applicator. The application of foam produces sharp transitions (80) between the hydrophilic and hydrophobic zones.
Abstract:
A method for enhancing the freeness of pulp made from secondary fiber is provided by adding an enzymatic mixture comprised of cellulase and pectinase enzymes to the pulp and treating under conditions to cause a reaction to produce an enzymatically treated pulp. The freeness of the enzymatically treated pulp is increased from the initial freeness of the secondary fiber pulp without a loss in brightness.
Abstract:
A composite stock material in sheet form for use in making various types of packaging for compact discs has an outer layer of paperboard material (12) thermally fused to an inner layer of bonded nonwoven fibers (16) through an intermediary layer (14) of thermoplastic material. The preferred composite is solid bleached sulfate boardstock of 18 pt. caliper, 100 % low denier, staple length polypropylene thermalbond, and an intermediary LDPE film of a weight of 10 lbs/ream. The composite sheet is a single stock material that can be manufactured into envelopes, cartons, sleeves, wallets, or any other type of desired packaging for compact discs.
Abstract:
A pulping apparatus for mixing fibrous stock materials for recycling thereof, comprising a vessel having a passageway therethrough defined by an inlet (12) opening and an outlet opening. The vessel includes a rotatable axial shaft disposed in the passageway, and a series of cooperating propeller members being arranged in offset radial relation to effect continuous flow of the pulp slurry through the passageway of the vessel. The pulping vessel of the invention is designed to minimize breakdown of the ink, stickies and contaminants in wastepaper while at the same time providing sufficient mixing action to allow them to contact each other for agglomeration. The invention also includes related deinking processes employing the aforementioned apparatus.
Abstract:
A universal heat seal tester (10) and method is provided for simulating heat-sealing processes. The tester (10) includes a pair of sample holders (11, 12) each of which hold a sample (20). A heater (30) is removably placeable between the samples (20), and the invention can simulate a hot-air side-seaming section of a cup machine. The method and apparatus test heat seals between the samples (20) while simulating real manufacturing processes, specifically heat sealing process, and can simulate other types of heat-sealing processes, such as ones relating to liquid packaging machines, which include electric, gas-fired, hot-air, induction, and radiant heating. The method and apparatus can be run automatically to eliminate operator variability.
Abstract:
A paperboard polymer coated carton having impregnated raw edge seams is provided. The raw edge (10) of the side seam is sealed by applying a sealant (40) directly to the paperboard raw edge (10), with the sealant (40) achieving sufficient penetration into the raw edge (10) to maintain the integrity of the sealant (40) during end use. The sealant (40) can be solvent borne, water borne, or hot melt. The sealant (40) is applied to the side seam raw edge (10) prior to the side seam operation, and the method of applying the sealant (40) is selected so that a continuous film of the sealant (40) can be applied to the side seam raw edge. The sealant (40) is one of wax, wax blend, saran emulsion, EVOH solution, polyvinyl alcohol solution, liquid adhesive, and hot melt adhesive.
Abstract:
Photographic developing compositions are provided that are free of dihydroxybenzene developing agents and are used in the processing of photographic elements. The developing compositions have a pH in the range of from 10.1 to 10.9 and comprise at least 0.17 moles per liter of an ascorbic acid developing agent, 0.3 to 0.5 moles per liter of a sulfite and 0.2 to 0.4 moles per liter of a carbonate buffer. Also provided is an ecologically advantageous method for processing photographic elements which utilizes the non-toxic developing compositions.
Abstract:
A compostable, biodegradable foam core board having a facing sheet (A) adhered to a foam core sheet (B) made of a foamable biodegradable material selected from a polyvinyl alcohol polymer, a strach-based thermoplastic polymer, a polyactic acid polymer, and other foamable, biodegradable polymers having structural rigidity when foamed. The foam core sheet has selected structural properties including a foam core weight in a preferred range of 30 to 50 lbs/msf, a foam density in a preferred range of 1.5 to 9.0 lbs/cu.ft, and a foam cell size in a preferred range of 0.30 to 0.70 mm. In one example, the foam core material is composed of a mixture of a polyvinyl alcohol polymer and high-melt-index polystyrene as a structural polymer additive. In another preferred example, the foam core material contains a blend of destructurized starch, polyethylene, polyvinyl alcohol, polyvinyl acetate, and glycerol as a plasticizer.