Classifications

• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
  • D21H27/10—Packing paper
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
  • B65D65/38—Packaging materials of special type or form
  • B65D65/42—Applications of coated or impregnated materials
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H19/00—Coated paper; Coating material
  • D21H19/10—Coatings without pigments
  • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12

Definitions

• the invention relates to wrapping paper for particularly fatty food products.
• So-called parchment or parchment replacement papers are known as greaseproof wrapping or wrapping papers for wrapping fatty foods, which should prevent the fat from breaking through, which e.g. according to Winnacker-Weingaertner "Chemische Technologie", Vol. I, p. 606 (1952) from sulfite pulp after a short H2SO4 treatment by greasy grinding in the Dutch and strong damp smoothing as very solid, mostly thin paper can be obtained. Because of their poor folding and wrapping ability and their endeavor to take on their original, flat shape, such parchment replacement papers are unsuitable as light wrapping paper.
• waterproof papers which are produced using a mixture of cellulose derivatives with rubber, oil, fat or wax with the addition of organic solvents, this mixture being added to the paper pulp after the solvent has been removed and in finished paper is brought together by pressure and heat.
• the production of these papers is complex, and they are not suitable for packaging food because of any solvent residues.
• wrapping paper for fatty foods in particular is used on one or both sides with paraffin-coated paper, for the production of which liquid wax is applied in conventional coating machines and reduced to a coating of about 15 g / m with a rubber roller and then cooled.
• Paraffinized papers are manufactured by J.P. Casey in "Pulp and Paper; Chemistry and Chemical Technology” 3rd Appendix, Volume IV 1983, J. Wiley & Sons, New York, pages 2533-2547.
• US-A-2 784 891 describes a plastic-coated packaging paper for food, in which the plastic coating is modified by the addition of hydrogenated fat and rubber.
• the invention is therefore based on the object of proposing a wrapping paper which is particularly suitable for fatty food products, can be produced economically on conventional coating devices and has the desired mechanical or physical properties.
• the wrapping paper according to the invention not only in mechanical and physical terms, in particular with regard to plasticity and oxidation stability is the same or superior to the well-known wrapping papers coated with microcrystalline paraffin on one side, but can also be used without problems under food law and, unlike paraffinized paper, is easily rotten and therefore more environmentally friendly.
• the base paper to be coated also corresponds to the base paper as it was previously used for the production of paraffinic wrapping paper.
• relatively solid types of paper with a paper weight of 20 to 60 g / m are used.
• hydrogenated fats ie animal or vegetable triglycerides
• triglycerides which have a melting point or solidification point between 45 and 62 ° C.
• the coating takes place in an amount of 10 to 25 g / m.
• Particularly suitable triglycerides are those which have been hydrogenated to an iodine number of 0 to 20 and preferably 5 to 10.
• Hydrogenated triglycerides both of vegetable and animal origin, or of mixtures of animal and vegetable crude oils, in which the weight ratio of stearic acid to longer- and shorter-chain fatty acids in the end product in the end product are 50:50 to 80:20 and preferably 60:40 to 75: Is 25; Such hydrogenated triglycerides show sufficient plasticity and do not lead to breaks when bent.
• a hydrogenated fat which was particularly suitable for coating the wrapping paper according to the invention on one or both sides was obtained according to the following example:
• the finished product obtained after refining and curing had the following properties: Free fatty acid content 0.04% Iodine number about 10 Melting or solidification point about 52 ° C / 53 ° C Fatty acid composition in% by weight: C12 0.3 C14 1.7 C16 28.4 C17 0.4 C18 55.2 C 18: 1 11.9 C20 1.8 C22 0.3.
• the hydrogenated fat obtained according to Example 1 was used for the one-sided coating of a conventional starting paper as follows:
• the hydrogenated fat was introduced from a storage tank heated with thermal oil at a temperature of approximately 90 ° C. into the tub of a coating device, the raw paper being suspended as a rotating roll in the development of this coating machine.
• the paper web was guided around a steel roller arranged in the tub such that only the Liquid hydrogenated fat was coated on the outside of the paper web.
• the amount of hydrogenated fat applied was reduced to the desired amount of about 15 to 18 g / m 2 using an adjustable rubber roller and then passed over a cooling cylinder.
• the cooled paper web was rewound as a rotary roll and then processed to the desired formats on a sheeter.
• the wrapping papers produced according to Example 2 showed their somewhat rough paper structure on the uncoated side and had a smooth appearance on the coated side; the corresponding cuts could easily be wrapped around differently shaped food products without showing cracks in the coating; there were also no significant restoring forces during the usual wrapping of cuboid objects.
• the wrapping papers according to the invention can be coated both on one side and on both sides, depending on the requirement. Even after long storage at room temperature, the wrapping papers according to the invention showed excellent oxidation stability; they were odorless and did not affect the food coated with them.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Wrappers (AREA)
• Paper (AREA)
• Materials For Medical Uses (AREA)
• Laminated Bodies (AREA)
• Fats And Perfumes (AREA)
• Detergent Compositions (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=6442507

Family Applications (1)

Country Status (9)

Families Citing this family (15)

Family Cites Families (2)

• 1991
  • 1991-10-11 DE DE4133716A patent/DE4133716C1/de not_active Expired - Lifetime
• 1992
  • 1992-10-01 NO NO923836A patent/NO179525C/no unknown
  • 1992-10-02 CZ CS923024A patent/CZ302492A3/cs unknown
  • 1992-10-06 DK DK92250282.8T patent/DK0536861T3/da active
  • 1992-10-06 EP EP92250282A patent/EP0536861B1/de not_active Expired - Lifetime
  • 1992-10-06 ES ES92250282T patent/ES2085557T3/es not_active Expired - Lifetime
  • 1992-10-06 AT AT92250282T patent/ATE136959T1/de active
  • 1992-10-06 DE DE59206022T patent/DE59206022D1/de not_active Expired - Lifetime
  • 1992-10-09 FI FI924587A patent/FI924587A7/fi unknown
  • 1992-10-09 PL PL29620692A patent/PL296206A1/xx unknown

Non-Patent Citations (1)

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