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ps ughtoveiglit whiles invade industrial world uetvehalr forejurdrde b renvrred the te tojwi ihuio this technique give a good finish wedneaday awing ally 91th u8s and permits working to exact dunen- page 6a 6aqf iuoq p fordmonarch dealer c used cars trucks whatmeans i ivftv uud car and ttock that kates thi al wow mas ucm lmn4waiml by asp tarvkemaii far j iiitimi anil pr4fmarm imparts mi ciaimi fi tfty priced fr ohsaiwilrtg value trvtfcfully and kcumuy smlveftfied warranted by yur pmaearch daur arid backed by bit tpvl4 l sand credit valley p rock i sod asphalt paving georgetown 7 craveu driveways motels tennis courts service stations parking lots road work let us beautify your home with an asphalt drive for free estimates triangle 73751 owned and operated by j w lawr advertising brings results reinforced telysurs on of the nutty pusucs to hit the headline since world w 11 in lefcu at their most epeetaeular in sports ear bodies but eays the author the materials have alio been working a quiet revolution in the industrial world here an ac count of the origin and fabricating method of these materials tome of me thins that are made from them and their prospects for industrial and consumer use by ftrathord hwftrten reinforced polyiter plastics have hit the adverusins headlines in a bin way wihin reccoi years because of their us- in ucunew sports cars chevrolet corvet and kaiser s oar rin the pubjic lias beard much of thtir pounuahlis and has been in irlirowl at tht possibility of bounce able lenders and evtrlasttnil car bod it tt not rnersll known however that- pukur have bttn working u juitt it volution in the less glamorous industrial vurld thrlr use in places of mtlal is arluiilly making inruadii in the awe industry although ihuy utru piacuciilli unukod before tin wtir ileur arc britm cumumed at u 27 000 000 pound clip today and ex puis i xpect that figure to rise to jk nullum pound tn thi forrjw pjblf future cat bod it may in the motl tprctm uur but art far from twinx the coniunur produrt bring madi from tluse n markahlt plastics ihr haw practically revolutionised the manu f cture of imill boat and cino whirr their combination of itnnih and litlhturu makes ibim an ideal material lrir alursgc tanks for water and corrosive lubalsnccs are twins fabricated from polyntt n thiy makr an ideal ikyliht material and are being uied for partitions in many modern buildings in canada in the us they are used as panel unit for traiur truck bodies and aa light weight replacement for steel pipe and thrnt uii arc bt ing mooted in canada alio sfjy strength toyester plastics are maklnie thrm selves felt became of their dual char acteriatics of ureal strength and iikht wiifiht hcinforccd with glass fibrn as most of thrm are polyesters strength approaches that of atrtl but their weight it timilar to wood addi tional virtues are flexibility and tough nrss which gives bounce snd elunin ates shattering hert i an outline of the history and the nature of these now plastic mstertals some of the most durable compounds ever produced by synthe tic means are the result of reaction between an acid and a basic alkaline substance materials produced in such a way are called esters in the chemists leaicon two examples pro duced by reacting acid and base are nylon and dacron unseed oil is also an ester wclftnown for the tough paints and floor coverings it makes it is manufactured of course in nal urc i wonderful laboratory at a price considerably lower than even the cheapest man made plastics the search for plastic mstcrlals with the qualities of polyesters has been going on for many years in lab oratories all over the world the track has lead repeatedly to ester type pro ducts actual development of the poly eat era began at the turn of the century but it was not till the mid 40 s that the correct aclda and bases were developed which made it posai ble to produce polyesters at a reason able price the chemical materials from which the polyesters are made are derived from coal tar and petroleum in a sense the polyesters are children of the great new petrochemlcal industry which has transformed so much of our everyday manufacturing into che mistry it was not until the petroche mical industry fuond its feet during world war u that it was possible to make the polyesters and many other plastics at a price the public could afford glass dae the trick even though the polyesters have remarkable properties by themselves they never realty came into their own were proud to show you our oil storage tanks and invite you to see them for yourself across from our king street office 20000 gallon storage capacity and our green and lemon truck always available to bring you on the spot fuel oil service and of course were jn the coal businessrtoo w h kenlner son tttlihou 74851 minos us to yoxjltdoor until somone developed a method of reinforcing lhm with glass this is accomplished by laying hi layers of glass cloth or fibreglass roving at the same time as tbe plastic is poured in to the mould slight pressure may be applied to compress the glass and plastic together to increase the bond ins strength glass is iut the only reinforcing material sometimes sisal fibre is used especially when exterme lightness is desirable glass is however pref erred because its fibres are actually stronger than steel in the spinning of glass threads this brittle and fra lie material picks up a tensile strength that am axes even the physic is is who work with it kibxvf being produced on an experimental basis today have a tensile htrength of one miltym lbs m r mjuan inch combination of a tough corrosion rcutant plastic like polyester with lius dure which runs through jt hi every directum like fine steel threads make out of the strong structural compounds known and it ntver rusts taike a polish like the fintsl wood and ts practically fin proof kirt application of rtinforccd poly citers to makr the htadhnes was thtir uc b tht l h army in thi hulls of jvault ljndmg boats a ditlop tut nt kt pi s ftfcrt i until after tht war ihm 1mm could tw dntn onto a rockv ihore at 35 miles an hour with out iaitukt to tht hulls ijindin lali with steel hulls illtftatid in this wj wire a dtad loss and wn usually i ft on the tnach as txptnd thlr iladur too ued n inforct d pol t s urs which have almost perfect trans mission for radio wavts and were tht n fort kuilablc for making plastic domes cowrin tht directional anttn nas for radar installations and on plane tail fins and many other air craft parts arc now being made from this strong light matt rial iolychurs like many other indus trial lt vtlopmints had their bugs afttr the war many individuals and companies rushed into polyester pro- rication and manufacture without any real product research snd testing strangt ly enough the product usually eave excellent service hut when the producer started adding up his figures he found he was losing money inadequate equipment and tools for finishing reinforced plastic matt rials often necessitated prodigious quanti tits of hand labor to make ihtm mar kitable polyesters acquired a reputation for being a trap which looked fine for a lartc part of the fabrication process and then failed price wise on some vi tal component in 1945 consumption of polyester was 0 m ltlon lbs but this slumped to 1 million pounds when peace came atany manufac turers were afraid to touch them un ul fabricating procedures were wor ked out with more scientific detail tot ay a consumption however is 27 million pounds and the graph is pointing almost strsight up cquinmant costs little one great advantage of polyester is that they can be fabrics ted into useful products without expensive or urge scale equipment tske for ex smple an aircraft seat now being made by smith and stone ltd of george town ont dies for manufacturing this seat by injection moulding of plastics would cost over 30 000 but for the same product in polyester plastic a handyman can make the dies in his basement furthermore rein forced polyester is far superior to any other plastic which could be used ec onomically for the same type of seat dies for conventional plastics must be made to withstand pressures of thousands of pounds per square inch but for reinforced polyesters need be designed for only slight pressures or none at all for polyester dies can be made from wood or plaster ot par is whereas conventional plastics de mand dies of specially hardened steel though the cheapness of dies for polyester fabrication has attracted fly- by night manufacturers and ha sre- sulted in many products being put on the market without adequate testing it ha released plastics from the sise- llmiu which hitherto held back dev elopment a die tor a car body or a bathtub laboriously drilled out of high alloy ateel represents a very large investment uade out of wood or plaster the investment is small an example of the type of manu facture which is making success out of polyester fabrication is the hump hreycoaburn co ltd which oper ates in a converted barn in the sub urbs of toronto both humphrey at coaburn are young engineering grad uates after leaving college they spent a considerable period of ap prenticeship with large companies and secured a good grounding in the ec onomics and processes involved in rubber and plastics manufacture fabricating methods their fabricating methods for re inforced polyester products can be classified into three types matched metal moulding balloon moulding and forming over a pattern matched metal moulding la the most expensive of the three but for tome applications gives the but pro duct in this method two moulds are made the first corresponding with the shape of the object to be manufactured the second lomewhat larger so that the first fits into it and leaves room for the plastic glass fibres are placed ever mould number one the fibre are soaked with liquid polyester and number two mould is clomped in position the moulds are then heated usu ally by electricity and this cures the resin after a short cure the moulds are unclampa and the prod- in the balloon moulding method a wooden or plaster die la made to conform to the general outlines of tbe object to be manufactured next hbrecuss and polyester recto are laid id end a balloon is inflated in aide the mould simultaneous beat ing cures the resin and the balloon farces the plastic and gas into tbe required shape forming over a pattern is the simplest of all methods for reinforced polyester production bathtubs are made in this fashion from fiberglass and polyester a shape identical to the inside of a bathub is made from wood or plaster of peru fibrtglass strands and polyester resin are laid over the shape tn alternate layers and then put in the sun to harden after several days the balbub is lifted from the form and afur trimming and fin uhing is ready for the market boats are made tn a similar fashion thar ar drawbacks too on i of tht interesting application of fiberi glass polyester forms of this type is as eovtrin for machimry to vm used in northern canada where air trsjisorulaon is necessary initrsoil rnd of sherbuoke qurtxc makea rover for its air romprtxjtors out of fibrrglass reinforctd polyesters tho potyestt r is sonn what more uipen slve than steel hitt it hat tht ad vuntait of lighlntss and it does not dt nt and dtnn up afttr srrwee in ihetuld r vt n though runforced polyester have asuuied an important place in thi industrial world they are not the ptrftct plastic material one factor that discourages their more general um is cost particularly in canada the nsulatuck chitmral co of r lmi rj ont and lb chemical oil and ite- sin t o of toronto manufacture raw polytattr reins in c anada but the rompontnts are imported from either the t or abroad tht he raw mat trials are plentiful but are subject to duty ami freight charges another disadvantage la that auto matic machinery has not yet been dev loped to handlt reinforced polyes urs efficiently and labor costs are usualy high it is this factor which holds bsck large scale production of reinforced polyester car bodies hum or has it that tent ral motors ts find ing its chtvruut corvet to be an ex pensive number for sports car drtv t rs and other enthusiasts this doesn t matter too much but its no good for the aw rage buyer nw stamping mafhod ironically enough polyester resins are in one development working ag airut themselves largc metal slam ping dies arc being made from polyes ters reinforced with fibreglaas the same combination of characteristics which makes polyester sheets so strong works with these large dies made from some of the newer polyes ter epoxy type resins they are as strong as steel diet but can be form ed by one man with a sanding mach ine this process promises to make stamping metal sheet so cheap that reinforced polyester sheets will never be sble to compete pricewtse chry sler is reported to be using these new dis in the usa snd canadian metal working concerns arc experimenting with them i ightweight articles with great structural strength and resistance to corrosion seem to offer the moat prof itable industrisl field for polyesters at present they are moving more slowly into the consumer field where mass production is a vital factor but their chsract ens tics are so useful thst industry will probably find it worthwhile to overcome mass produc tion difficulties and make polyesters part of everyday living free delivery hotmrtoa lod naah for u to tuttwr prescriptions drugs sundries t justhione tr 73692 maccormacks dririf store eavestroughing plumbing heating don houston tr 72506 buy the best buy bh paints for lasting beauty sold by twins woodworking iimehousi tr 72162 manufacturer of sash frames screens doors lnuda and eu trim door hardware floor tile r glass open evenings till 9 pm and all day saturday building sand concrete gravel road gravel fill top soil tom haines glen williama triangle 73302 faad pionatt dairy ration aa a paatura auppunsant and aa a wintar milk prodkioar plonaar dairy ration la a bulky palatable vitamin- fortlflad balanced feed with mnlaaaaa and pallet added it inaraaaea your return by keeping production right up to inherited ability banana pioneer dairy ra tion 1 high ibttjn total dlgaatlbl nutrient the jpio- neerred cow earrlee toad fleah and continue to produce right up to the end of lacta tion hiproof htrd ktaloi pn thutim and profit by fttding planter dairy ration authorized dclaval dkauat bramptom mlkltta farm supply joaaph it ahwmpkmi mien m have your esso oil burner -or- a conditioning unif indalled now 25 down 5 year to pay let initahnani tn sjrhvrrbxil billsproule 4 ellzabtfrf sffiar s oramjmton t timbnb 1r77 revart ehatgat j jawaaaii