Norwich bulletin., 1922-07-20
EXpLAINS PYUAEIN MANUFACTURE
 TO NORWICH ROTARtN MEETING

, the sheet of paper, which 1t does by re-
 movai of the excess moisture from the pulp on very fine wire, after which the sheet is pressed and dried on series of rolls and driers. The sheet. going oyer this machine is continuous one and Is TO inches wide, and the met dry
 weight Is 14 pounds to the ream.
 Coming from the last dryer the sheet is automatically wound into a roll about 20 inches in diameter and after this, is rewound and slit into three smaller
 rolls on a winding and sitting ma
 chine. The rolls are wrapped in kraft
 paper and are ready for shipment to Arlington.
 Tie first operation at Arlington Is the snredding of this paper, and this is done on a series of paper cutting machines; which tear the paper into small pieces about inch square. The paper is now ready for nitration and this, operation consists of subnerging a charge or the shredded paper in tank containing a mixture of nitric and sulphuric acid for
 g period of about half an hour. Then by means of a centrifugal wringer and a series of washing and. settling tanks, as much acid as possible is removed from the pulp and the resulting mass IS known, as pyfoxyiin. The recovered
 acid Is returned to g rectifying plant and made ready for reuse. In the nj trating operation the paper gains about 50 per cent in weight, At The, nitrated paper is next mixed with l denatured alcohol, using about two pounds. of alcohol to one pound of pa per, after which it is pressed into cakes about two. inches thick and two, feet in diameter This pressing operation re- moves much of the alcohol but consid- erable remains in the stock and aids in giving it, fiexibility. The alcohol re-
 covered is re-distilled for further use.
 The cakes. of pressed pyroxylin are next dumped in mixers similar to those
 used, in bakeries and proper quantities of refined carnph0r, zinc oxide urea, castor. oil and other ingredients. depend- ing on the kind of stock to be made, are added. The agitators in the mixers are then started and this mass is mixed thoroughly for one hour. It is then run through filters to remove all dirt from the stock.
 Color. Is Added
 The mixed stock is transferred to the rolling room where series of rolling { machines each with two highly polished
 rolls work and rework the stock fur 1 ther, until it has reached the proper con-
 sistency to be taken of in slabs approx l imatesy, 1 inch in thickness. During th:s rolling operation colors are added de- pending on the color required for the ] particular kind of stock being made. l The slabs are cut into rectangular shape and are piled from six to ten high l and placed in hydraulic. press Heat ] iss turned on and, the slabs pressed. to- gether under tremendous pressure, caus- l ing them to thoroughly amalgamate into i one large cake. 50 inches long, 2e inches { wide and s inches thick. Cold water is
 then applied to the press causing the stock te harden.
 Cut Into Sheets.
 l The cake is now ready to be cut into 1 sheets of any thickness required from 1 5-10o0 of an inch to one inch This l is done on sheeting machine by means i of sharp knife which Is operated sim I ilariy to an ordinary planer. The sheets l are taken to seasoning houses where ] they are hung up 10 dry s- out further. ! This drying process requires from a I few days to six months dependsng OF i the thickness. After seasoning the ! sheets are polished by pressing in a | heated press between shets of high.3 | polishd metal. They are then ready te be packed and shipped
 l Although our company makes regu- larIy over 300 colors. the principal ones are. ivory, transparent shell, pearl. am l Der, black and white. In fact any col l or or combination of colors can be in {, tated in Pyralin. The ivory. coloret 4 stock is used either by ourselves in tn. : manufacture. of toilet ware. or is scid l. i the. manufacturers Of similar articles T The transparent is practically all takeI ,i by the manufacturers of automobiles 10 I use in side curtains. Shell color zoe! ! principally into combs. optical fittings and toilet sets. Pearl is used by tn
 pean CD button manufacturers, whii
 amber makes amber CD pipe bits.
 1 Pyralin. Is produced regularly in tubes
 rods and beading as well as in sheets
 The tubes are used by toilet box, jew el box and harness manufacturers. Tn
 rods are made into knife handles pip
 bits. manicure handles and fishing rec
 handles. The beading goes principals
 into optical goods and knitting needles
 Uses For Pyralin.
 New uses for Pyralin are constant cropping up and we, have one depart
 nnent devoted exclusively to this impor. ant item. Pyraln. can be pressed, mold } ed, bent, sawed, cemented and stretche
 in any desired shape. One of the mos ) prominent developments m recent veal
 has been what is known as super ( safetee glass. By ,cementinG a thi ? piece of transparent Pyralin- betwee II two sheets of glass. the glass become l non-shatterable and is even bullet proo : This glass has been adopted recent
 i in many banks and it's possibilities fS {. use in wind shields, car windows, etc . are unlimited.
 To best illustrate the common every t day uses of Pyralin, let us follow a, ma
 through the routine of an ordinary da,