US2126192A - Greaseproof gummed paper - Google Patents

Description

Patented Aug. 9.

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Ferdinand W. Humphner, Oak Park, Ill., as-

signor, by mesne Gummed Paper Delaware assignments, to Mid-States Company; acorptiratioh of No Drawing. Application September 30, 1935,

Serial No. 42,913 r '5 Claims. (01. 91-68) This invention relates to greaseproof gummed .D per and is particularly useful in connection with gummed paper which is used for labels that are to be attached to oily or oil-secreting surfaces such as the dressed skin of poultry, etc.

An object of the invention is to provide.

gummed paper which may be readily applied to oily or oil-secreting surfaces without producing a discoloration or deforming of the paper or m label. 1

Other specific objects and advantages will appear as the specification proceeds.

In preparing my improved greaseproof gummed paper, I employ any suitable paper for gumming such as the paper which is ordinarily used for this purpose andfor forming gummed labels,- etc. One side ofthe paper is coated with a thin layer of lacquer, the lacquer being resistant to oil. The lacquer may be ,of any suitable composition.

2i) I have found that a large variety of lacquersare satisfactory in that they prevent oil frompassing into the paper. Lacquers formed of vinyl resins and other synthetic resins have been foundvery satisfactory. .Also, I-am able to em- 25 ploy lacquers in various forms beginning with the synthetic type and including those containing nitrocellulose and to which are added resins of various types.

Adhesive containing a reactive solvent is next 30 applied to'the lacquer surface and preferably as soon as possible after the lacquer has dried. The ahesive may be of any suitable composition such as water soluble glue, etc. The solvent is employedfor two fundamental purposes. Its first g5 object is to enable the water soluble adhesive to obtain a grip on the lacquer surface which is normally repellentto' the adhesive. A second object is to enable the adhesive, after it has been remoistened, to again regain its grip on the 40 lacquer surface. In the initialforming of the' gummed paper, the adhesive, when -dried', con- I tains a small portion of the solvent which again becomes active upon moistening of the adhesive and enables the moistened adhesive to regain its 45 hold on the lacquer.

The solvent may be of any suitable {type bu preferably of a water miscible type: I have found mono-methyl ether of ethylene glycol satlsfactory for this purpose.

50 As an example of the process, Ihave added from one-half to one per cent of the above solvent, mono-methyl ether of ethylene glycol, to a water soluble adhesive and have found that such a compounded adhesive maintains its hold upon 56 the oilimpervious coatingor lacquer.

The coating or gummed product may be tinted orimprinted in any desired manner to give the product a distinctive color or mark for identification, etc. Also, if desired, the lacquer or oilresistant coating may be applied to both sides of the paper, if desired, to make the entire product greaseproof.

After the lacquer and adhesive coatings have i been applied and the product is dry I pass the paper over the usual gum-fracturing barto break up the gum layer into segments which prevent curling. I find that this processing operation resuits in thorough and uniform fracturing of the gum layer without breaking the continuous surface of'the lacquer, etc. At the same time, thewater is prevented from entering the paper.

The presence of a solvent in the gum fragments enables the dissolved adhesive to regain its grip on the lacquer. The lacquer coating remains unchanged in position to prevent passage of oil into the body of the paper.

The new product may be readily applied to a surface without weakening the paper body and the written orprinted matter on thepaper is not obliterated or made difficult to read by oil discolorations.

The foregoing detailed description has been given for clearness of understanding only, and no unnecessary limitations should be understood therefrom, but the appended claims should be construed as broadly as permissible, in vlew of the prior art I claim: o

'1. A greaseproof gummed paper for labels and the like comprising a strip of paper having at least one side thereof coated with a water-insoluble oil-resistant lacquer, a water soluble adhesive on said lacquer, said adhesive being fractured throughout to prevent curling, and an organic solvent for said lacquer remaining in said adhesive for uniting said adhesive to said coating.

. 2. A greaseproof gummed paper comprising a strip of paper having at least one side thereof covered with an oil resistant waterproof lacquer, awater soluble adhesive over said lacquer, an organic solvent forsaid lacquer and said adhesive contained'in said adhesive for uniting said adhesive to said lacquer, said adhesive being fractured throughout while said lacquer remains unbroken.

' resin lacquer, a water soluble adhesive over said lacquer, a relatively high boiling water-miscible organic solvent for said lacquer contained in said adhesive, said adhesive being fractured throughout while said lacquer remains unbroken.

4. A gummecl paper tape comprising'a strip of paper havingat least one side thereof coated with a waterproof oil resistant resinous lacquer, an adhesive over said lacquer, said adhesive having contained therein a derivative of a dihydric alcohol for uniting said adhesive to said lacquer, said derivative being a solvent for said adhesive and said lacquer, and said adhesive being brolsen into small fragments to render the tape noncurling, said lacquer surface being unbroken.

5. A greaseproof gummed paper comprising a strip of paper having at least one side thereofcovered with an oil-resistant waterproof lacquer, a water-soluble adhesive over said lacquer, said adhesive containing monomethyl ether of ethylene glycol, said ether being a solvent for, and serving to unite, said adhesive and said lacquer, and said adhesive being fractured throughout while said lacquer coating remains unbroken.

FERDINAND W.