Nov. 19, 19.46. J‘ R, McMlLLlN ETAL 2,411,326 MAKING REINFORCED SLIVERS Filed Nov. 27, .1942 gvwcm/bow L JRM‘MilZin ‘w @Hllake, a 5% java, 1 W Y ‘ Patented Nov. 19,1946 2,411,326 UNITED’ STATES “ PATENT‘ ‘OFFICE ‘ MAKING ‘REINFORCED’ SLIVERS James R. McMillin and Stanley H. Lake, ‘Newark, Ohio, assignors to Owens-Corning Fiberglas Corporation, ,Toledo, Ohio, a, corporation ‘of Delaware Application November 27, 1942, Serial No. 467,278 , , 7 Claims. >1 _ l v (C1. 19-145) , ‘ ' This invention relates to a ?brous product and to an improved me'thodland apparatus for man ufacturing such a product. on the line 2—-2 of Figure l; and . t Figure ‘3 is a diagrammatic view of the sliver ' of this invention showing the reinforcing core or of a drum and to pullthe'depo'sited ?bers off the drum to form a sliver of glass ?bers. This meth od is disclosed and‘ claiiriédY‘in theTucker and, lllaiilnan Patent No. 2,264,345, dated December 2, . ‘ ‘ l ‘Figure 2 is a sectional view taken substantially ‘In the manufacture of certain types of ?brous products such, for example, as glass or other 9 2 partly in section of apparatus constructed in accordance with this invention; ‘ thermoplastic materialsit has been customary to collect attenuatédiviglass ?bers‘ on‘the periphery p ' Figure 1 is a diagrammatic sideelevational view ‘ strand. 7 ‘ Although this invention concerns itself more particularly with the manufacture of slivers formed of glass, nevertheless, other materials hav ing ‘similar characteristics may be employed. Several examples of materials which may be used Although slivers of the character disclosed in the above patent have'».proved very satisfactory in connection with the present invention, are ar in practice, nevertheless, iii the manufacture of 15 ti?cial silk commonly known as “nylon,” vinyl acetate, cellulose acetate, resin, sugar, and vinyli certain products, it is desirablettc‘increase the dene chloride resin. ‘ tensile strength of the sliver. With this in view the present invention contemplates reinforcing With the above in view reference is now made to the drawing wherein it will be noted that the the sliver with a continuous strand which may be a single ?lament or may be a yarn of desired reference character 10 indicates a container or material, preferably glass. melter adapted to contain a supply ll of molten ' 1 _ Heretofore reinforced asbestos slivers have been produced by feeding a reinforcing thread and an asbestos sliver together between the usual rub bing aprons or belts for condensing the sliver, 25 thermoplastic material such'as glass. A bushing and folding the sliver around thethread by the or relatively small ori?ces l3. action of the belts. This process is not satisfac The ori?ces l3 are designed to enable a glass stream to be drawn through each ori?ce by a tory in the treatment ‘of glass ?bers, however, I2 is suitably supported at the bottom of the con tainer in communication with the supply ll of molten glass and comprises a pluraltiy of nipples _ blower l4 supported below the bushing l2 and sent an added, otherwise unnecessary step in the 30 having the further function of forming atten~ uated ?bers from the‘ glass streams. In detail, production of the slivers. the blower 14 comprises complementary sections It is an object of the present invention to pro l5 and I6 respectively positioned at opposite sides duce a reinforced glass sliver without increasing of the glass streams issuing from the bushing the number of steps or operations over those l2. Thesection I6 ‘is provided with a chamber needed to produce an ordinary glass sliver. because the use of rubbing aprons would repre 11 communicating with a source of ?uid under pressure,;such as-a steam or air, by means of a conduit 18 and also communicating at one end a continuous strand ‘of material as the ?bers are with the adjacent end of a chamber I9 formed produced, the strand being advanced along a pre determined path of travel coinciding with the 40 in the section 15. It will also be noted from Fig More particularly this invention contemplates distributing glass ?bers in tangled relation about movement of the sliver as‘it is formed, and, if desired, applying an adhesive to the strand prior to distributing the ?bers about the strand so that the ?bers will adhere to the strand. , A further'feature‘ of this invention is to pull a continuous strand of material across a ?ber col; lecting surface and through the zone of ?ber deposition on the surface by winding the strand around the rotatable member usually employed to ure 1 that the sections of the blower 14 are re spectively formed with discharge ori?ces arranged to discharge ?uid under pressure in a downward direction ‘toward opposite sides of the glass’ streams. The pressure of ‘the ?uid is sufficient to apply the pulling force on the glass streams required to draw the same from their respective‘ ori?ces and form attenuated glass ?bers. The glass ?bers 20 attenuated by the blower pull the body of ?bers off the said surface and 50 M are collected in a web on the periphery of a drum 2| suitably supported for rotation beneath draft it to the form of a sliver. . ' . The foregoing, as well as other objects, will the blower M in spaced relation to the latter. In accordance with conventional practice the pe-' riphery of the drum is perforated and sufficient ceeds, especially when considered in connection 55 suction is created in the drum by means not shown with the accompanying drawing, wherein:v be made more apparent as this description pro 2,411,896 to collect: .3. . ____________ v.4 be waXJresln, or any similar adhesive capable of the periphery of i securing the ‘?bers to the continuous strand as 'theelatter is drawn through the ?ber deposition the drum. , The web of ?bers collected or disposed-on the; - periphery of the drumis pulled off of ‘the, drum ' ""zone- on the drum by the rotatable member 22. As a result of the above, a sliver of ‘the type by a member 22 supported for rotation at the shown in Figure 3 of the drawing is produced front side of the drum 2| in spacedielat-ion to the latter; As the web of fibers is pulled off of the .whaving a core in the form of a strand such, for drum it is drafted to the form of a sliver 23 and ~ , example, as a length of glass yarn and having -lon_g or theoretically continuous glass ?bers in the latter is wound around the rotatable member 22. The ?bers produced’ by the process just de 10 terlaced about the core so that the latter acts scribed are usually known as staple glass fibers. ‘ to effectively reinforce the sliver. It will also be They are-substantially continuous in length when , understood from the foregoing that the glass ?bers are distributed about the strand by ad they-are formed ‘but are broken up to some extent vancing the latter through the zone of ?ber dep asthey are‘ deposited on the surface‘ of the ‘drum osition on the drumor other ?ber collecting sur and to greater extent when they are pulled from face and, consequently, the relatively long ?bers ' the surface and draftedcinto a sliver. The re also extend in the general direction of length of sulting sliver contains, predominantly, fibers of the strand but are intertangled to an extent pro great length but of lengths manytimes less than , viding integrity in the body of ?bers about the the total length of the sliver, with the ?bers inter laced and tangled to an extent providing a. high 20 core. This arrangement of the ?bers around the strand provides a sliver having very high tensile degree of integrity in the sliver both in the direc strength and one which will not‘ break during tion of itslength and in transverse directions. subsequent weaving or knitting operations. Also, by depositing /the ?bers in tangled relation about the reinforcing strand, the ?bers-become inter - - The presenttiinyention provides a sliver of this , type reinforced with/a strand of glass or other “ ?bers. The strand is'incorporated in the sliver 25 in such a way that the original ?u?y nature of the sliver is vnot altered as-it would be if the strand and the sliver were intertwisted or if the sliver > was folded about the strand. laced about the strand to such an extent that the strand is separated from the body of ?bers only with great difficulty, demonstrating lthe degree of integrity ofthe product of the present invention. Retention of the‘ For some applications of the reinforced sliver it has been found advantageous to employ as a original ?u?lness is‘especially desirable where the 30 sliver is to be served onto a wire to form a layer of ?brous insulation. , - " reinforcing core a strandmade up of one or more ' To obtain maximum strength in the reinforced ?laments of a thermoplastic resinous material ing streams of molten ‘glass, gatheringthe ?bers thus formed into. grglip's__-or strandsand winding the strands upon a drum-or'spooli, The ?nished heat treated after it is served on-the wire to soften the thermoplastic material ‘of . the reinforcing ; core. to an extent causing’ it to ?ow and thorough are substantially continuous in'length throughout " Yide the-needed‘ dielectric resistance. ' sliver it has been found preferable to employ as ' suchas Vinylite, polystyrene, “Seran,” and simi the reinforcing core a strand or yarn oi’ continui 35 lar resins. This is particularly valuble where the ' sliver is to be served onto a wire to form va layer ous glass ?laments. Glass ?laments of the con’ ‘ of insulating material thereover. The sliver is tinuous type are madetby continuously attenuat strands containa: large number-'of‘?laments that: r ly' impregnate the ?brous insulating layer to pro the length of the strand ‘The thermoplastic core may also be employed where the sliver is to be used forother purposes and wherever it is desired to reinforce the silver until it has been twisted, woven, knitted, or pros-‘ . The way in which the sliver liisreinforced with a strand of material, preferably glass, and either in-the form of a strand of glass ?laments or in the form of a yarn, will now be described in de; tail. The reference character 24 in Figure 1 in dicates a continuous strand packaged onn’a spool 25 supported. attnezreanside'of the __?ber collect ing drum 2 |."’In the present instance, the strand essed in some other manner, but where the rein forcing is not required after processing but is ad vlzimtageously replaced‘ by" impregnation of the 50 is unwound from the spool 25 by'the rotatable" _ - member: 2-2 previously described as operable to _ s _, ver: ' ' ' ' ‘ ‘ ious modi?catl'onssof the present invention ' ,,_rnay vbe made within thespirit of the invention and within the scope of the appended claims. RUH-théjz?bBISO? the ‘periphery of the collecting We claim: drum-2|. ' As shown in Figure l, the strand is '1. Apparatus for forming a reinforced sliver . - ' comprising a drum supported for rotation in‘ a position to collect a web of intertangled ?bers as his formed, a package comprising a strand of tended downwardly around a pad 21 to the rotat- ' continuous glass ?bers supported at one side of able member 22. The locations'of the pad 21 and the rotatable member 22 with respect to the col 00 thedrum, a rotatable member supported at the opposite side of the drum for pulling the deposited lecting drum 2| is such as to enable the strand ?bers oi! the periphery of the drum in the di to pass over the collecting drum 2|; in contact with the periphery of the latter at the zone of rection of rotation of the drum to form a sliver and for also unwinding the package by pulling the ?ber deposition on the periphery of the drum. The above arrangement is such that the ?bers the strand across the periphery of the drum through the zone of ?ber deposition on the drum are distributed about theistrand as the latter is whereby said ?bers are drawn‘ substantially par drawn across the drum 2| by the rotatable mem passed upwardly through an eye or guide 28 sult-‘ ably supported above the package “and is ex ber 22 and the strand is felted with the ?bers. > allel with said strand, means supported adjacent ‘ In accordance with this invention the ?bers are, the package in a position to engage the strand secured to the strand by coating the strand with 70 as it is unwound from the package and operable , a suitable adhesive prior to moving the strand ' across the drum 2 |. In detail, the strand is coated , with an adhesive material by the pad 21 and this material is supplied to the pad by a suitable reser to apply an adhesive, on the strand to cause the ?bers to adhere to the strand as the latter is pulled across the periphery of the drum, and ' means for applying radially inward forces against voir 28. The adhesive material employed may 75' said?bersaround said strand. 5 2,411,828 6 2. The method which comprises continuously ' ?laments onto a moving supporting surface and forming on the periphery-of a rotatable member a glass ?ber web in which the ?bers are hap causing them to accumulate in matted form on said. surface with. the ?laments extending pro hazardly arranged and interlaced with, each ‘ miscuously and haphazardly but in directions other,_ advancing ell-‘continuous strand ofef‘glass mainly substantially parallel with?sald surface, ?bers‘ across thm‘peri'phery of 7 said member continuously passing a preformed strand along . I through the fiber deposition zone. on the member said surface in the direction of movement there and in- the direction of its rotation, applying an ' of, and continuously drawing the mat of ?laments adhesive'to the strand prior to engaging the web and the strand from said surface as the mat is tocaus'e the ?bers to adhere thereto, and pulling 10 formed, at a rate greater than the rate of move said web and strand together from-the periphery ment of said surface, whereby the mat of ?la of the rotatable member in the general direction of movement of the periphery and atv a rate suf ments is attenuated as it is drawn together with the strand from said surface, and concentrating ' ?ciently higher than the rate of movement of the ' themat of ?laments to compact sliver form about periphery to draw the ?bers of the matinto sub 15 the strand as it advances beyond said surface. stantial parallelism with the strand.‘ ' p _ 6. Apparatus for forming a reinforced sliver 3. The method which comprises winding a con tinuous strand, causing the strand to‘ pass across the periphery of a rotatable member in the di rection of its rotation during the winding opera tion, simultaneously forming and depositing a comprising a drum supported for rotation in a position to collect a web of intertangled ?bers as it is formed, meansv for supporting a package com 20 prising a strand of continuous glass ?bers at one side of the drum, a rotatable member supported glass ?ber web in which the ?bers are haphazardly arranged and interlaced with each other ‘on the periphery of the rotatable member about the . at the opposite side of the drum for pulling the deposited ?bers off the periphery of the drum in the direction of rotation of the drum to form a strand, and pulling saidlweb and strand together 25 silver and for also unwinding the said package from the periphery of the rotatable member at a - by pulling the strand across the periphery of the drum through the zone of ?ber deposition on the rate sufficiently higher than the rate of movement of the periphery to draw the ?bers of the mat ‘ drum, whereby said ?bers are drawn substantially into substantial parallelism with the strand. parallel with saidstrand, and means for applying 4. The method of forming a reinforced strand 30 radially inward forces against said ?bers around ‘or sliver which comprises projecting ?ne glass ?l said strand. '1 aments onto a movingsnpporting surface and causing them toaccumulate in’matted form on said surface with the ?laments extending promis cuously and haphazardly but in directio?simainly substantially parallel with said surface, continu ously passing apreformed strand along said sur-u facev in the direction of movement thereof, and continuously drawing the mat of ?laments and ‘ - 7. The method which comprises winding 9. con tinuous strand of thermoplastic. resinous mate- 4 rial, causing the strand to pass across the periph 35 ery of’a rotatable member in the direction of its rotation during the winding operation, simulta-~ neously forming and depositing a glass ?ber web ‘ in which the ?bers are haphazardly arranged and interlaced with each other‘ on the periphery of "the strand from said surface as the mat is formed 40 the rotatable member about the strand and pull at a vrate greater than the rate of movement of i-ng said web andstrand together from the pe-"' ' said surface, and simultaneousl transforming rlphery of the “rotatable member at a rate suf the mat into the form of a reingrced strand or > sliver in- which the ?laments are arranged main ly' in substantial‘ parallelism' about said strand. 5. The method of forming a reinforced strand I. or silver which comprises projecting ?ne glass 45 ?'ciently higherthan the rate of movement of the periphery to draw the'?bers of the mat into sub- ' stantlal parallelism‘ with the strand. JAMES R. McMlILIN. STANLEY n. LAKE.