Classifications

• • 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
  • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
  • B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
  • B65D85/804—Disposable containers or packages with contents which are mixed, infused or dissolved in situ, i.e. without having been previously removed from the package
  • B65D85/808—Disposable containers or packages with contents which are mixed, infused or dissolved in situ, i.e. without having been previously removed from the package for immersion in the liquid to release part or all of their contents, e.g. tea bags

Definitions

• the invention relates to a plastic film, in particular for the production of liquid-permeable bags or the like. With finely divided openings.
• the invention has for its object to provide a plastic film which is suitable for producing such bags for a wide variety of uses.
• the size of the openings is between -90 and 110 ⁇ m and the number of openings is 900 to 1200 per square centimeter.
• This configuration ensures that, on the one hand, sufficient water can penetrate the bag, and on the other hand, the often very small tea particles cannot escape from the bag.
• thermoplastic material which softens at a temperature of 115 to 140 ° C. Both the plastic film and the bag can be produced relatively easily from this material.
• thermoplastic material there is no risk of softening the thermoplastic material at the temperatures that occur when the bags are used.
• thermoplastic material of the film softens at a temperature of 120 to 130 ° C.
• thermoplastic material of the plastic film is polyethylene or a copolymer of ethylene.
• thermoplastic material of the film is a polyethylene of medium to high density and high molecular weight.
• a plastic film was produced from a low-pressure polyethylene of high density (density at 23 ° C 0.953 g per cm 3 ; melt index (190/5): 1.2 g / 10 min .; reduced specific viscosity in decaline at 135 ° C: 2, 7dl / g).
• the film thickness was between 10 and 12 ⁇ m and the average hole size was 100 ⁇ m; the number of holes was 1024 per cm 2 , while the surface area of the openings was 6.4% of the total film surface.
• the liquid permeability was compared to a commercially available paper tea bag with the same dimensions and the same tea content.
• the liquid permeability of the plastic film bag was much better than that of the commercially available paper tea bag.
• the amount of tea components dissolved was The amount of fine particles of tea allowed through was less than or at most equal to the amount that the paper bag let through.
• the plastic film was made from the same polyethylene as in Example 1, but with a film thickness of 12 ⁇ m; the average hole size was 169 ⁇ m and the number of openings was 400 per square centimeter. The area of all openings was 6.5% of the total surface of the plastic film.
• Example 2 The test was carried out in the same manner as in Example 1. The amount of tea components dissolved was conventional tea bags.
• Example 2 a plastic film was used as in Example 1, the thickness of which was 12 ⁇ m.
• the average size of the openings was below 75 pm (65% of the openings were between 35 and 65 ⁇ m and 17% were between 10 and 20 ⁇ m).
• the number of openings was 991 per square centimeter, the area of the openings being 4.1% based on the total surface of the plastic film.
• a plastic film according to Example 1 was also used in this example.
• the thickness was again between 10 and 12 ⁇ m, while the average size of the openings was 93 ⁇ m and the number of openings per square centimeter was 992. This resulted in an area of all openings of 8.5% of the total area of the plastic film.
• tea bags of size 5.4 x 6.3 cm would again be made by heat sealing and each filled with 2 g of tea.
• the amount of tea parts removed was here paper teabags. Dabe.i, the permeability of solid tea components was equal to or less than that of the paper bag compared.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Laminated Bodies (AREA)
• Packages (AREA)
• Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
• Molding Of Porous Articles (AREA)
• Filtering Materials (AREA)
• Apparatus For Making Beverages (AREA)
• Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
• Wrappers (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=19840148

Family Applications (1)

Country Status (5)

Cited By (7)

Families Citing this family (1)

Citations (5)

• 1982
  • 1982-08-18 NL NL8203234A patent/NL8203234A/nl not_active Application Discontinuation
• 1983
  • 1983-08-12 EP EP83107987A patent/EP0101082A1/fr not_active Ceased
  • 1983-08-15 AU AU18001/83A patent/AU1800183A/en not_active Abandoned
  • 1983-08-17 ZA ZA836067A patent/ZA836067B/xx unknown
  • 1983-08-17 JP JP58150105A patent/JPS5953543A/ja active Pending

Patent Citations (5)

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