US2544509A - Method of making paper containers greaseproof - Google Patents
Method of making paper containers greaseproof Download PDFInfo
- Publication number
- US2544509A US2544509A US563995A US56399544A US2544509A US 2544509 A US2544509 A US 2544509A US 563995 A US563995 A US 563995A US 56399544 A US56399544 A US 56399544A US 2544509 A US2544509 A US 2544509A
- Authority
- US
- United States
- Prior art keywords
- coating
- containers
- glue
- paper
- container
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000004519 manufacturing process Methods 0.000 title description 12
- 238000000576 coating method Methods 0.000 claims description 41
- 239000011248 coating agent Substances 0.000 claims description 40
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims description 30
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 18
- 239000007788 liquid Substances 0.000 claims description 16
- 239000004312 hexamethylene tetramine Substances 0.000 claims description 15
- 235000010299 hexamethylene tetramine Nutrition 0.000 claims description 15
- 229960004011 methenamine Drugs 0.000 claims description 15
- 229930195733 hydrocarbon Natural products 0.000 claims description 12
- 150000002430 hydrocarbons Chemical class 0.000 claims description 12
- 239000003921 oil Substances 0.000 claims description 10
- 239000000314 lubricant Substances 0.000 claims description 9
- 239000003502 gasoline Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 239000002356 single layer Substances 0.000 claims description 6
- 239000004215 Carbon black (E152) Substances 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 5
- 239000000123 paper Substances 0.000 description 30
- 239000003292 glue Substances 0.000 description 24
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 12
- 239000004014 plasticizer Substances 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000004519 grease Substances 0.000 description 8
- 235000011187 glycerol Nutrition 0.000 description 6
- 238000001035 drying Methods 0.000 description 5
- 230000008020 evaporation Effects 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 241000779819 Syncarpia glomulifera Species 0.000 description 4
- 239000011084 greaseproof paper Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000001739 pinus spp. Substances 0.000 description 4
- 235000010356 sorbitol Nutrition 0.000 description 4
- 229940036248 turpentine Drugs 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 235000015110 jellies Nutrition 0.000 description 3
- 239000000600 sorbitol Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000008274 jelly Substances 0.000 description 2
- 239000003350 kerosene Substances 0.000 description 2
- 238000009740 moulding (composite fabrication) Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 description 1
- FBPFZTCFMRRESA-ZXXMMSQZSA-N D-iditol Chemical compound OC[C@@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-ZXXMMSQZSA-N 0.000 description 1
- 239000004386 Erythritol Substances 0.000 description 1
- UNXHWFMMPAWVPI-UHFFFAOYSA-N Erythritol Natural products OCC(O)C(O)CO UNXHWFMMPAWVPI-UHFFFAOYSA-N 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229940037003 alum Drugs 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 239000003899 bactericide agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- UNXHWFMMPAWVPI-ZXZARUISSA-N erythritol Chemical compound OC[C@H](O)[C@H](O)CO UNXHWFMMPAWVPI-ZXZARUISSA-N 0.000 description 1
- 235000019414 erythritol Nutrition 0.000 description 1
- 229940009714 erythritol Drugs 0.000 description 1
- 230000000855 fungicidal effect Effects 0.000 description 1
- 239000000417 fungicide Substances 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 125000004836 hexamethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[*:1] 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- -1 of conditioner Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 235000002639 sodium chloride Nutrition 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 239000006188 syrup Substances 0.000 description 1
- 235000020357 syrup Nutrition 0.000 description 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
- 229960001763 zinc sulfate Drugs 0.000 description 1
- 229910000368 zinc sulfate Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/22—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
- B31B50/74—Auxiliary operations
- B31B50/742—Coating; Impregnating; Waterproofing; Decoating
- B31B50/745—Coating or impregnating formed boxes
Definitions
- the invention relates to paper containers and particularly to flexible paper containers adapted to be used for the packaging and retailing of oils, lubricants, turpentine, kerosene, gasoline, and similar liquid hydrocarbons.
- the invention also relates tomethods for the manufacture of these containers which hereafter will be termed grease-proof containers.
- Paper as a manufacturing material for containers, has in recent years rapidly gained in importance.
- Parafiine coated paper containers are for obvious reasons not usable for the commercial handling and the transportation of oils, lubricants, turpentine and similar non-aqueous liquids.
- the primary object of the invention to produce a coating for paper containers which renders the safe packaging and retailing of oils, lubricants, turpentine, kerosene, gasoline and similar liquid hydrocarbons possible.
- the invention is based on the discovery that paper containers can be effectively grease-proofed if a coating is applied to the same which contains a plasticizer in admixture to a glue solution.
- Multi-wall paper containers have been rendered grease-proof by either lacquering the same inside or outside or by inserting an oil insoluble adhesive between the multiple paper sheets in order to unite the same and hold them together.
- the invention does not relate to multi-sheet containers, but to paper containers which after being coated retain sufiicient porosity to permit, by water evaporation through the wall, the, establishmentof a humidity equilibrium between the coating and the surrounding atmosphere.
- a conditioner may be preferably added to the plasticizer containing a glue solution; if a conditioner is used which is adapted to function as a plasticizer, the latter may be entirely replaced by the conditioner.
- Glycerine i preferably used as a plasticizer, but other substances which are compatible with glue Jellies, such as ethylene glycol, treacle, glucose, may be employed as plasticizers for the purposes of the invention.
- the conditioner may be taken from the hexahydric alcohols carrying, for instance, 80% or more polyhydric alcohol; the commercial sorbitol syrups have been found to be of excellent service; however, other substances, such as for instance butylene glycol, iditol or erythritol may be successfully employed as conditioners for the control of the residual moisture in the coating and to impart thereto increased mechanical strength and flexibility.
- the glycerine used as a plasticizer should be free from common salt; indeed almost any distilled glycerine having a concentration of 80% or more will serve.
- Glues which will yield a olution of low viscosity are preferred for making the instant grease proofing liquid.
- a usable glue would be a low grade hide glue which by the standard test of the National Association of Glue Manufacturers would show a jelly strength of 135 grams on the Bloom jellometer.
- the presence of a bactericide and of a fungicide is desirable; for instance, zinc sulfate equal to about one percent of the glue may be preferably used.
- a small percentage of hexamethylenetetramine for instance one fourth of 1% of the dry weight of the glue may be added.
- the acidity of the paper used for the manufacture of the containers will in contact with the applied coating react with the hexamethylene tetramine setting formaldehyde free and thereby producing a tanning of the glue, that is, insolubilize the coating and thereby render it water L, resistant in the course of a few days.
- Paper will have a pH below 6 when made with ordinary rosin-alum size customarily used in the making of paper. This paper may well be used for the purposes of the invention.
- a container or package made of originally porous paper after being grease-proofed in the presence of hexamethylenetetramine according to the invention will be fully impervious to rainfall.
- the ranges of the individual components form ing the grease proofing coating of this invention may vary considerably and lie, for instance, between to 30 parts by weight of glue, 18 to 60 parts by weight of a plasticizer or a mixture of a plasticizer and a conditioner or of a conditioner only if the latter acts asa plasticizer, and 15 to 40 parts by weight of water.
- composition of the coating is given below:
- Glue 5 to 30 parts by weight Plasticizer, to 35 part by weight Conditioner, 8 to 25 parts by weight Hexamethylenetetramine, /6 to per cent of the glue Water, to 40 parts by weight
- the amounts of water, of conditioner, plasticizer used will be chosen depending on the Jelly strength of the glue used, 1. e. a high grade glue requires more water and conditioner, etc., to give the desired viscosity of the coating solution at a given temperature, for instance 150 '1.
- a variation in composition is possible according to whether a thick or a thin coating or a change of physical properties is desired.
- the grease proofing composition forming this invention may be con-.
- Glue Bloom strength 10 parts by weight Glycerine, 18 parts by weight Sorbitol syrup, 12 parts'by weight Hexamethylenetetramine, .03 parts by weight Water, 20 parts by weight tion and humidity exchange takes place between the drying coating and the surrounding atmosphere, until equilibrium is reached.
- the drying has, therefore, been effected through the container wall, but not from the free surface of the coating.
- the instant method of rendering a paper container grease proof and capable of holding oils, lubricants, turpentine, gasoline and similar hydrocarbons is particularly adapted to be used with existent automatic paper container manufacturing and filling installations.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paints Or Removers (AREA)
Description
Patented Mar. 6, 1951 METHOD OF MAKING PAPER CONTAINERS GREASEPROOF Ralph H. McKee, New York, N. Y.
No Drawing. Application November 17, 1944, Serial No. 563,995
Claims. (01. 226-19) The invention relates to paper containers and particularly to flexible paper containers adapted to be used for the packaging and retailing of oils, lubricants, turpentine, kerosene, gasoline, and similar liquid hydrocarbons. The invention also relates tomethods for the manufacture of these containers which hereafter will be termed grease-proof containers.
Paper, as a manufacturing material for containers, has in recent years rapidly gained in importance.
The manufacture of parafilne coated paper containers for the retailing of milk clearly characterizes this development. Parafiine coated paper containers are for obvious reasons not usable for the commercial handling and the transportation of oils, lubricants, turpentine and similar non-aqueous liquids.
In the past wooden containers and barrels have been frequently used for these purposes after being coated with a glue solution at an elevated temperature, which coating would be dried before the containers were used.
This proofing method cannot be applied to paper containers which as such do not possess suflicient rigidity and stability to withstand deformation; the brittle glue coating is bound to crack and to burst, if the paper container is subjected to the inevitable bending stresses occurring during the use and transportation, whereby leakage of the contents will result.
The wooden barrels are nowadays being replaced by steel drums, which however have the great disadvantage that they cannot be discarded at will and have to be stored for return to the delivery firms.
The solution of the problem which underlies this invention is aggravated by the necessity to' effect from the applied coating an evaporation of the water through the paper walls up to a point where equilibrium is attained with the humidity of the surrounding atmosphere.
It is, therefore, the primary object of the invention to produce a coating for paper containers which renders the safe packaging and retailing of oils, lubricants, turpentine, kerosene, gasoline and similar liquid hydrocarbons possible.
It is a further object of the invention to produce a flexible grease-proof paper container which will remainunhurtand from which the coating will not crack or burst off when the container is subjected to inevitable rough handling and resulting bending and impact stresses.
It is another object of the inventionto manufacture an inexpensive flexible, grease-proof 2 paper container which can be discarded and burned after use.
It is also an object of the invention to produce a paper container having a grease-proof coating which for a certain period after the application of the coating preserves sumcient gas porosity to permit through its walls the establishment ofa humidity equilibrium between the coating and the surrounding atmosphere.
It is a further object of the invention to devise a grease proof paper container which may be manufactured without difilculty and without or with but minor changes of the working appliances in existing automatic paper container manufacturing and filling installations.
It is a further object of the invention to manufacture grease proof flexible paper containers where an aqueous grease proofing liquid is used for the production of the coating and the drying of the coatings is effected through the container walls and not from the free surface of the coating.
It is also an object of the invention to produce grease proof flexible paper containers where the grease proofing liquid is applied to the container walls at an elevated temperature and the coating is jellied by chilling under avoidance of drying.
It is a further object of the invention to produce grease proof paper containers where the solidification of the applied coating is effected by contact with the cold container filling and the container is sealed before the drying of the coating is completed.
It is also an object of the invention to manufacture grease proof paper containers which can be heatand pressure-sealed at the top and where the sealing will be effected after time of filling or after the container has been allowed to stand.
With these objects in view the invention is based on the discovery that paper containers can be effectively grease-proofed if a coating is applied to the same which contains a plasticizer in admixture to a glue solution.
Multi-wall paper containers have been rendered grease-proof by either lacquering the same inside or outside or by inserting an oil insoluble adhesive between the multiple paper sheets in order to unite the same and hold them together.
The invention does not relate to multi-sheet containers, but to paper containers which after being coated retain sufiicient porosity to permit, by water evaporation through the wall, the, establishmentof a humidity equilibrium between the coating and the surrounding atmosphere.
A conditioner may be preferably added to the plasticizer containing a glue solution; if a conditioner is used which is adapted to function as a plasticizer, the latter may be entirely replaced by the conditioner.
Glycerine i preferably used as a plasticizer, but other substances which are compatible with glue Jellies, such as ethylene glycol, treacle, glucose, may be employed as plasticizers for the purposes of the invention.
The conditioner ma be taken from the hexahydric alcohols carrying, for instance, 80% or more polyhydric alcohol; the commercial sorbitol syrups have been found to be of excellent service; however, other substances, such as for instance butylene glycol, iditol or erythritol may be successfully employed as conditioners for the control of the residual moisture in the coating and to impart thereto increased mechanical strength and flexibility.
The glycerine used as a plasticizer should be free from common salt; indeed almost any distilled glycerine having a concentration of 80% or more will serve.
Glues which will yield a olution of low viscosity are preferred for making the instant grease proofing liquid.
An example of a usable glue would be a low grade hide glue which by the standard test of the National Association of Glue Manufacturers would show a jelly strength of 135 grams on the Bloom jellometer.
The presence of a bactericide and of a fungicide is desirable; for instance, zinc sulfate equal to about one percent of the glue may be preferably used.
In accordance with a preferred embodiment of the invention a small percentage of hexamethylenetetramine, for instance one fourth of 1% of the dry weight of the glue may be added.
The acidity of the paper used for the manufacture of the containers will in contact with the applied coating react with the hexamethylene tetramine setting formaldehyde free and thereby producing a tanning of the glue, that is, insolubilize the coating and thereby render it water L, resistant in the course of a few days. Paper will have a pH below 6 when made with ordinary rosin-alum size customarily used in the making of paper. This paper may well be used for the purposes of the invention.
A container or package made of originally porous paper after being grease-proofed in the presence of hexamethylenetetramine according to the invention will be fully impervious to rainfall.
The ranges of the individual components form ing the grease proofing coating of this invention may vary considerably and lie, for instance, between to 30 parts by weight of glue, 18 to 60 parts by weight of a plasticizer or a mixture of a plasticizer and a conditioner or of a conditioner only if the latter acts asa plasticizer, and 15 to 40 parts by weight of water.
The composition of the coating is given below:
Glue, 5 to 30 parts by weight Plasticizer, to 35 part by weight Conditioner, 8 to 25 parts by weight Hexamethylenetetramine, /6 to per cent of the glue Water, to 40 parts by weight The amounts of water, of conditioner, plasticizer used will be chosen depending on the Jelly strength of the glue used, 1. e. a high grade glue requires more water and conditioner, etc., to give the desired viscosity of the coating solution at a given temperature, for instance 150 '1. Likewise, a variation in composition is possible according to whether a thick or a thin coating or a change of physical properties is desired.
As a preferred example the grease proofing composition forming this invention may be con-.
stituted, as follows:
Glue Bloom strength), 10 parts by weight Glycerine, 18 parts by weight Sorbitol syrup, 12 parts'by weight Hexamethylenetetramine, .03 parts by weight Water, 20 parts by weight tion and humidity exchange takes place between the drying coating and the surrounding atmosphere, until equilibrium is reached.
The drying has, therefore, been effected through the container wall, but not from the free surface of the coating.
The instant method of rendering a paper container grease proof and capable of holding oils, lubricants, turpentine, gasoline and similar hydrocarbons is particularly adapted to be used with existent automatic paper container manufacturing and filling installations.
I claim:
1. In a method of grease-proofing containers to be used for the transport of liquid hydrocarbons, such as gasoline, oils, lubricants and consisting of a single-layer porous paper having a pH of less than 6, the steps of applying to the inside wall of the containers a coating of an aqueous solution of a low viscosity glue and of a quantity of hexamethylene tetramine equal to about 0.2 to 0.5 per cent of the dry weight of the glue hereupon directly filling the container with the liquid hydrocarbon of a sufficiently low temperature to thereby congeal the coating and sealing the same whereupon the coating is hardened by the formaldehyde set free from the hexamethylene tetramine by contact with the acid in the container wall and dried by cooperation of its moisture content through the porous container wall.
2. In a method of grease-proofing containers to be used for the transport of liquid hydrocarbons, such as gasoline, oils, lubricants and consisting of a single-layer porous paper having a pH of less than 6, the steps of applying to the inside wall of the containers a coating of an aqueous solution heated to about F. of a low viscosity glue and of a quantity of hexamethylene tetramine equal to about 0.2 to 0.5 per cent ofthe dry weight of the glue hereupon directly filling the container with the liquid hydrocarbon coated to about 40 to 50 F., thereby congealing the coating and sealing the same whereupon the coating is hardened by the formaldehyde set free from the hexamethylene tetramine by contact with the acid in the container wall and dried by evaporation of its moisture contents through the porous container wall.
3. In a method of grease-proofing containers to be used for the transport of cold liquid hydrocarbons, such as gasoline, oils, lubricants and consisting of a single-layer porous paper having a pH of less than 6, the steps of applying to the inside wall of the containers a heated coating of an aqueous solution of a low viscosity glue, glycerin and sorbitol syrup and of a quantity oi hexamethylene tetramine equal to about 0.2 to 0.5 per cent sisting of a single-layer porous paper having a pH of less than 6, the steps of applying to the inside wall of the containers a coating of a heated aqueous solution containing in about 20 parts by weight of water about 10 parts by weight of a low viscosity glue, about 18 parts by weight 01 81.7 erine, about 12 parts by weight of sorbital syrup, about 0.03 parts by weight of hexamethylene tetramine, hereupon directly filling the container with the cold liquid hydrocarbon, thereby congealing the coating and sealing the same whereupon the coating is hardenedby the formaldehyde set free from the hexamethylene tetramine by contact with the acid in the container wall and dried by evaporation of its moisture content through the porous container wall.
5. In a method 01' grease-proofing containers to be used for the transport of cold liquid hydroauaaoo 6. carbons, such as gasoline, oils, lubricants and consisting of a single-layer porous paper having a pH 01' less than 6, the steps of app ying to the inside wall of the containers a coating of an aqueous solution containing in 15 to 40 parts by weight of water, 5 to parts by weight of a low viscosity glue, 10 to parts by weight of glycerin, '25 to 28 parts by weight of sorbitol syrup, 0.03 parts by weight of hexamethylene tetr, hereupon directly filling the container with the cold liquid hydrocarbon, thereby congealing the coating and sealing the same whereupon the coating is hardened by the formaldehyde set free from the hexamethylene tetramine by contact with the acid in the container wall and dried by evaporation of its moisture content through the porous container wall.
RALPH H. Mc
' REFERENCES CITED The following references are of record in the file or this patent:
UNITED STATES PATENTS Number Name Date 1,192,765 Durkee July 25, 1916 1,417,708 Wright May 30, 1922 2,164,494 Brown July 4, 1939 2,164,495 Brown July 4 1939 2,414,274 Sass et al. Jan. 14, 1947 FOREIGN PATENTS Number Country Date 495,352 Great Britain Nov. 11, 1938 OTHER REFERENCES Condensed Chemical Dictionary, 3rd edition, p. 687, Reinhold Publishing Co., 1942. (Copy in Div. 64.)
Claims (1)
1. IN A METHOD OF GREASE-PROOFING CONTAINERS TO BE USED FOR THE TRANSPORT OF LIQUID HYDROCARBONS, SUCH AS GASOLINE, OILS, LUBRICANTS AND CONSISTING OF A SINGLE-LAYER POROUS PAPER HAVING A PH OF LESS THAN 6, THE STEPS OF APPLYING TO THE INSIDE WALL OF THE CONTAINERS A COATING OF AN AQUEOUS SOLUTION OF A LOW VISCOSITY GLUE AND OF A QUANTTY OF HEXAMETHYLENE TETRAMINE EQUAL TO ABOUT 0.2 TO 0.5 PER CENT OF THE DRY WEIGHT OF THE GLUE HEREUPON DIRECTLY FILLING THE CONTAINER WITH THE LIQUID HYDROCARBON OF A SUFFICIENTLY LOW TEMPERATURE TO THEREBY CONGEAL THE COATING AND SEALING THE SAME WHEREUPON THE COATING IS HARDENED BY THE FORMALDEHYDE SET FREE FROM THE HEXAMETHYLENE TETRAMINE BY CONTACT WITH THE ACID IN THE CONTAINER WALL AND DRIED BY COOPERATION OF ITS MOSITURE CONTENT THROUGH THE POROUS CONTAINER WALL.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US563995A US2544509A (en) | 1944-11-17 | 1944-11-17 | Method of making paper containers greaseproof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US563995A US2544509A (en) | 1944-11-17 | 1944-11-17 | Method of making paper containers greaseproof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2544509A true US2544509A (en) | 1951-03-06 |
Family
ID=24252737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US563995A Expired - Lifetime US2544509A (en) | 1944-11-17 | 1944-11-17 | Method of making paper containers greaseproof |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2544509A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1192765A (en) * | 1915-12-07 | 1916-07-25 | Maurice Malan Durkee | Coating composition. |
| US1417708A (en) * | 1918-07-11 | 1922-05-30 | Sealright Co Inc | Rendering paper and paper containers greaseproof |
| GB495352A (en) * | 1936-11-19 | 1938-11-11 | Atlas Powder Co | Improvements in or relating to coating base materials, coated articles and coating compositions therefor |
| US2164494A (en) * | 1936-11-21 | 1939-07-04 | Atlas Powder Co | Oil, grease, and hydrocarbon resistant material |
| US2164495A (en) * | 1936-11-21 | 1939-07-04 | Atlas Powder Co | Oil, grease, and hydrocarbon resistant material |
| US2414274A (en) * | 1943-10-21 | 1947-01-14 | Patent & Licensing Corp | Flexible oilproof adhesive compositions |
-
1944
- 1944-11-17 US US563995A patent/US2544509A/en not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1192765A (en) * | 1915-12-07 | 1916-07-25 | Maurice Malan Durkee | Coating composition. |
| US1417708A (en) * | 1918-07-11 | 1922-05-30 | Sealright Co Inc | Rendering paper and paper containers greaseproof |
| GB495352A (en) * | 1936-11-19 | 1938-11-11 | Atlas Powder Co | Improvements in or relating to coating base materials, coated articles and coating compositions therefor |
| US2164494A (en) * | 1936-11-21 | 1939-07-04 | Atlas Powder Co | Oil, grease, and hydrocarbon resistant material |
| US2164495A (en) * | 1936-11-21 | 1939-07-04 | Atlas Powder Co | Oil, grease, and hydrocarbon resistant material |
| US2414274A (en) * | 1943-10-21 | 1947-01-14 | Patent & Licensing Corp | Flexible oilproof adhesive compositions |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2251296A (en) | Paper product | |
| US2416734A (en) | Greaseproof paper | |
| US2544509A (en) | Method of making paper containers greaseproof | |
| US2031036A (en) | Composition of matter and method | |
| US2237325A (en) | Acetone-formaldehyde resins | |
| US2101876A (en) | Composite film and method of making | |
| US2308692A (en) | Greaseproof paper | |
| US1355976A (en) | Container for alkaline substances | |
| US2162764A (en) | Container | |
| US1866743A (en) | Coating composition | |
| US3736164A (en) | Organophobic and hydrophobic surface coatings | |
| US2164494A (en) | Oil, grease, and hydrocarbon resistant material | |
| US2292323A (en) | Wax coating composition | |
| US2959512A (en) | Laminated paperboard products and method of making same | |
| US2147180A (en) | Moistureproof coating | |
| US2164495A (en) | Oil, grease, and hydrocarbon resistant material | |
| US2752263A (en) | Adhesive composition | |
| US1767170A (en) | Sealing compound | |
| US2028189A (en) | Undercoat for lacquers and lacquered material | |
| US2391737A (en) | Leak sealing compound | |
| US1946205A (en) | Coated paper and process of producing same | |
| Owens et al. | Effect of storage conditions on weathering of commercial glass containers | |
| SU475439A1 (en) | Paper pulp for the manufacture of packaging corrugated cardboard | |
| US3183055A (en) | Process of hardening cellulose paper board with certain alums and polyhydroxyl loweralkanols and products produced therefrom | |
| US2126192A (en) | Greaseproof gummed paper |