US1198099A - Compound to be used as an adhesive in the manufacture of envelops and the gumming of paper. - Google Patents

Description

UNITED STATES PATENT oF IoE.

vrcron G. BLOEDE, or CATONSVI'LLE, MARYLAND.

COMPOUND TO BE USED AS AN ADHESIVE IN THE MANUFACTURE OF EN VELOPS AND THE GUMMIN G OF PAPER.

No Drawing.

7 To all whom it may concern:

Be it known that I, VICTOR G. BLOEDE, a citizen 'of the United States, residing in Catonsville, in the county .of Baltimore and State of Maryland, have invented a new and useful Compound to be Used as an Adhesive in the Manufacture of Envelops and the G1uinming of Paper, of which the following is a specification.

In the manufacture of envelops and the gumming of paper artificial, or natural gums soluble in water are used, the former usually being produced by the hydrolyzation 'of some dextrin or gum, the latter naturalproducts as represented by gum arabic, Senegal, etc. These products are all used in the form of a thick syrupy solution of various degrees of density and produced by dissolving the dry gums by boiling with water, a process well known by all manufacturers using such products.

While the ordinary grades of paper present no difliculty in the matter of perfect adhesion, there are a considerable number of grades which owing to some peculiar texture or construction, or through the character of the stock .or sizing employed in their manufactu re, high compression, or finish, or other causes show. a remarkable degreeof resistance, or repulsion for the gum used'to efl'ect their adhesion, and in many instances are the greatest ease,

that the paper cannot be so refractory E I nve ops made to permanently adhere. made from paper of this and in some cases, and especially after a few weeks storage, the

' 'gummed surfaces separate or fall apart,

making the envelop useless commercially. Among the types of paper especially subject to this trouble may be named the hard sized linen and Manila grades, also certain embossed or highly calendered or finished papers.

Papers of the type described, while often in other respects especially adapted for envelops or other manufactured products, present almost insurmountable difliculties when it comes to properly sticking one surface upon the other. It has long been known that caustic soda or potash, or other strong alkali added to the gum used 'in working these papers will produce satisfactory results so far as adhesion is conform of starch, and called"stances, or conditions,

type open up with 'odor whatever, and low cost answers cerned, but the use of such agents is in most cases entirely madmissible owing having strong power of penetration as well as affinity for, or solvent action upon, subrepellent effects inthese refractory papers. It was found as a result of thesetrials that any substance having a solvent action on Patented Sept. 12, 1916. Application and February 28, 1914. Serial No. 821,786.

tothe discoloration they, produce in the gum producing the water fatty resinous, or waxy bodies when added to and combined with the gum used as an adhesive increased its sticking qualities to such an extent as to make satisfactory re-' sults possible with grades of paper hitherto regarded as unstickable? Another great practical advantage incidentally brought about by such an addition is the. fact that owin to the Water repellent condition of the paper being overcome by its action, or penetrating properties, the gum applied forms a much smoother and more sightly film, and the puckering or buckling of the paper is greatly lessened, produchig very much better and more satisfactory work.

Among the substances that are applicable in my process,'1 may name any of the volatile hydrocarbons, such as benzin, benzol, turpentine, 7 chloroform, ether, tetra chlorid or bisulfid of carbon, indeed, as stated, any volatile solvent of fatty or resinous matters. claims. to any special substance or com pound, but have found in practice that tetra chlorid of carbon, owing to its uninflammability, ready volatility without leaving any y purpose rather better than most other substances of the. type named. Some nonvolatile oils and their saponifications, or emulsions, also produce similar effects, for instance, the sulfo-ricinates, but not nearly in so marked a degree, and possess the fur- ,ther objection of remaining in the composition While the volatile additions named wholly disappear by the time the applied watery solution of gum has dried.

I do not, therefore, confine my In carrying out my process, I first make up a solution of a gum or dextrin of the desired coneentratimi or viscosity. The relative amount of water and dry material used depends somewhat upon the character of the product from which the solution is made as there is a wide range in the viscosity the various starch gums on the market, but I have found that from one and. a. half pounds to two pounds of the dry gums or dextrin of commerce to one pound of water will give good results. In actual practice, I use what is termed the standard envclop gum, and make up my mixture as follows: 160 lbs. standard envelop gum, 100 lbs. water.

Sift the gum into the water cold, and stir the mixture until a smooth paste is formed, free from lumps and clots of undissolved material. Heat this mixture in a copper jacketed kettle, preferably provided with a mechanical stirrer, and a terhavingln-ought it to a boil, simmer the mixture for one to one and one-half hours, then allow to cool to normal temperature, and having, replaced the evaporated water so as to bring, the mixture back to weight of both ingredients, that is, 260 lbs, add 5% to of the dry weight of the gum used, that is, 8 lbs. to 16 lbs. of tetrachlorid of carbon, benzol, turpentiue, or similar solvent, and stir the composition until a full combination, or emulsification of the solvent with the paste has been cilectcd, when the (UlllPOSltlUll is ready for use, and may then be applied in the ordinary manner known to the trade.

I do not limit myself to any specific solvent, nor to specific proportions in which it is to be used, as both the choice of the agent employed and its quantity used depends largely upon the character of the paper operated upon, but as stated, I have found tetra chlorld of carbon a very satisfactory agent and an addition of 5% of the weight of the liquid gum a satisfactory proportion for general work.

\Vhile I have. especially mentioned artificial and natural gum solutions, these being most largely used for this purpose. my process is equally applicable to preparations of glue or flour or raw starch pastes used as adhesives in some classes of work, the addition of the solvent besides securing the advantages set forth, also acting as a powerful preservative and preventing fermentation and decay.

Iclaim:

A water soluble mucilage or paste consisting of about 160 pounds of envelop gum, 100 pounds of water, and eight to sixteen pounds of volatile solvent, substantially as described and for the purpose specified.

VICTOR (l. BLOICDI).

Witnesses:

WM. H. 'luoMAs, Jr., H. M. Yes.

copies of this patent may be obtained {or iiye onto each, by addreuin: the "Commiuioner of Patents, Washington, D. O.