Shredding machines

Cuprammonium rayon is made from scoured and bleached cotton linters or purified wood pulp with a high a cellulose content. The cellulose is washed and then pressed until it contains about 50 per cent of water. In this state, it is placed in a mechanical mixer together with cuprammonium solution and agitated until completely dissolved, whilst the temperature is maintained at 5° C (41 °F). The solution is then diluted to about 10 per cent concentration. After filtration and exposure to vacuum to remove air bubbles and dissolved gases, the solution is allowed to ripen in enclosed vessels until it is the desired viscosity. In modem practice copper carbonate is mixed intimately with the cellulose in a shredding machine and the resultant mass is then broken up and stirred for some hours with aqueous ammonia and caustic soda, when it passes into solution. 

The sheets of alkali cellulose, in the state in which they emerge from the press, are broken up into crumbs in a shredding machine consisting of a drum inside which blades with serrated edges rotate. The crumbs are removed and aged by storing in galvanized containers for 2 or 3 days, the... 

In the washing of fabrics, machine and timing must be carefully adjusted. Too large an energy input for too long a time can injure fabric severely, and eventually tear it to shreds. The same effect is quite possible with purely mechanical agitation. 

Control photocopying machines where access to customer data can be obtained. Destroy data by shredding and secure disposal. 

Ascorbic acid retention in some fresh-cut produce is affected by the nature of the slicing method used (Lee and Kader 2000). Higher levels of ascorbic acid were retained in samples that had been prepared by manually tearing the lettuce into strips. Lettuce shredded using a sharp knife initially retained 18% less ascorbic acid than the torn samples. The retention of ascorbic acid in the products sliced by machine was 25-63% lower than that in lettuce shredded by manual tearing. Using a blunt machine blade resulted in 10% lower ascorbic acid levels than when a sharp blade was used (Barry-Ryan and O Beirne 1999). Losses in ascorbic acid occur when vegetables are severely cut or shredded (Lee and Kader 2000). 

The contaminated soil is processed through a specially designed machine that shreds the soil and adds compost material. Nutrients, water, and specialized microorganisms may be added... 

In Great Britain, according to the patents of Picton [6] small flakes of sheet wood-cellulose have been nitrated, while in the United States shredded cellulose prepared by the Stem method [7] was most widely used (shreds made of loosely felted cellulose fibres in a special machine). This last form of cellulose is especially suitable for uniform penetration and imbibition of the nitrating acid. Normal nitrators, as used for linters, are also suitable for nitrating this type of cellulose. 

A routine operation usually proceeds as follows. First the head of the femur is sawn off. The socket in the pelvis (the acetabulum) is then made deeper with a cutting machine and subsequently the metal socket is stamped into the hip. This metal is then lined with plastic to facilitate sliding movements. The femur is scooped out with a rasp and filled with cement. This cement is a mixture of plastics which automatically polymerizes in the femur. Since 1997 it has been becoming customary to grind up old hip heads and use the bone shreds together with the cement as a filler for the shaft of the prosthesis. The stem of the prosthesis is hammered into the femur, the spherical head is attached to it and inserted into the plastic socket. 

Powdered FRP was manufactured by a machine that have rotating drums with embedded many diamonds. FRP tanks were shredded and powdered to become about 30 micrometers of the average diameter. 

In the plastics recovery section, the polypropylene is separated from other plastics and products such as PVC separators, ebonite cases, labels, rope handles, etc., via a series of classifiers and hydro-cyclones. The polypropylene pieces or chips are cleaned, washed, and separated from any remaining paste and dust. Once the material has been shredded to smaller fragments, the plastic is a valuable by-product of battery recycling. Plastic cleaning and processing methods are so effective that heavy metal contamination in the final polypropylene product is very low. The final product can be used in household goods such as washing machines, vacuum cleaners, and dishwasher parts, or in products for the automotive industry [5]. 

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