US1885113A - Water and flameproof paper - Google Patents

Description

. paperiis asbestos fibers.

Patented Nov. I, 1932 THOMAS JENKINS, or nonnrs'rown, rnmtss'z nvnum nssrsivon T01 nonmszeown MAGNESIA & ASBESTOS COMPANY, OF NoRB Is'row-N; PENNSYLVANIA; A oonrorca TION OF PENNSYLVANIA WATER AND. rLmnrnoon; 1mm

i No Drawing. Original application filed November {12,j a30, s 1ia1 no. 495 267. Div ded? amiuiis, 7

application filed May 1932. "Serial No. 612,657:

his is a division of my application Serial No. 495,267 filed November 12, 1930, for Letters Patent of the United States for unprovement in heat insulating coverings; the paper herein claimed being advantageously employed as the outer casing for such coverings for steam and hot Water conduits and containers in installations for heating buildings and for other purposes.

The principal ingredient of my improved Ordinarily, paper formed of such fibers is characterized by a dusty gray appearance due to .the natural color of such fibers and is highly absorbent of moisture which causes such ordinary pap to be rapidly disintegratedwhen subjected to moisture unless provided with an exterior coating of some other material, as paint, which coating is almost as costly .as the paper itself because of sorbent nature of such paper, which necessitates the application of an abnormally large amount of paint per unit of surface to cover it. It is the purpose and effect of my nvention to produce such a paper which 1s not only substantially fiameproof because of the high percentage of its asbestos content but 1s substantially waterproof and essentially different in coloring from the natural asbestos fibers; the natural dusty colorof the fibers being suppressed and modified by inclusion therewith of a metallic oxide capable of chemical reaction and combination with the other ingredients of the paper to permanently impart to the paper a pleasing and in eradical color withoutmaterial increase of the cost of production of such improved paper as compared with the ordinary asbestos paper. For instance, I find it convenient to make'the paper composition ofcertain ingredients which, in the dry state, are in the following proportions:

' 7 Per cent Asbestos fibers 93- Wood cellulose. 3 Starch 2 Iron oxide 2 Sodium silicate .50 Alum I .25

the naturally porous and ab- Thedry; materials aforesaid are mixed" about three'times; their bulk" of'water to form 'apulp which-is thenf'ormed into sheets,- conveniently. by ordinary. pa er making means. When such sheets are d'ried,the' me tallicioxide combines'with the other 1ngre clients to f'o'rma" moisture"- resistant' binder for-the asbestos fibers and. impart: a periria n'ent pleasingpink tint? to the composition throughout theentire thickness ofthe' sheets,

so' that they retaintheir" distinctive coloring without any superficial coating and despite subjection to such' wear as would remove tlieordinary painted coating; 1

Although thecomposition: aforesaid is selfcol'ore'd withz a pleasing efiect, it is adapted to "receiveany desired coating on decorating materiali For instance; ,liquid' coating ma;

ter'ial-may be" sprayed thereon orfotherw-ise applied-thereto atmuch less cost'than such coatings may be appliedto ordinary asbestos I paper, because the binder 1 aforesaid has 'ren dered y i'mpr'oved: paper non-absorbent so that may be coveredhv am'inimuni amount of any ordinarypai'nt'. v

compositionnot only. because oftheir: afi'inity forthe silicate thereinwliich cause them to react andcombi'n'e" therewith to form an insoluble binder for the asbestos fibers, but be- 2 cause any desired color of the composition may be attained by the use thereof. Although I prefer to use the iron oxide (peroxide) which will produce the pleasing pinktint abovecontemplated for casings for pipe coverings, because that tint harmonizes with any color scheme; other shades and tints from black to pale yellow may be produced by the employment of iron oxide. However, other metalli c' oxides may be employed to react with the s1l1cate and alum constituents'of the composition to form binders having the desired waterproof quality. Therefore, I do not, desire to limit myself to the precise details of construction, arrangev ment, or method of procedure herein set forth,

as it is obvious that various modifications may be made therein'without departing from the essential features of my invention, as defined in the appended claims.

Iclaim:

1. A pink tinted water and flalneproof paper including asbestos fibers ninety-three per cent.; wood cellulose three per cent; starch two per cent. iron oxide two per cent;

sodium silicate one-half of one per cent; and

alum one-fourth of one per cent.

2. A Water and fiameproof paper including asbestos fibers; wood cellulose; starch; iron oxide; sodium silicate; and alum..

3. A water and flameproof paper of which the principal ingredient is asbestos fibers; said fibers being held together by a binder including the insoluble residue of the reaction of iron oxide and sodium silicate.

4. A water and fiaineproof paper of which the principal ingredient is asbestos fibers; said fibers being held together by a binder including the insoluble residue of the reaction of a metallic oxide with sodium silicate.

5. A water and fiameproof paper ofwhich the principal ingredient is asbestos fibers; said fibers being held together by a binder including the insoluble residue of the reaction of an oxide with a silicate and alum.

6. A water and fiarneproof paper of which the prlncipal ingredient is asbestos fibers;

said fibers being held together by abinder including the insoluble residue of the reaction of a metallic oxide with a silicate.

7. A water and flaineproof paper, the principal ingredient of which is asbestos fibers; said fibers being held together by a binder including the insoluble residue of the reaction of iron oxide and a derivative of sodium.

8. A water and flameproof paper, the principal ingredient of which is asbestos fibers; said fibers being held together by a binder including the residue of the reaction of an oxide and a silicate of different metals.

In testimony whereof, I have hereunto signed my name at Norristown, Pennsylvania, this tenth day of May, 1932.

THOMAS JENKINS.