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Product package, packaging material and use of the packaging material

A packaging material and product packaging technology, applied in packaging, wrapping paper, layered products, etc.

Inactive Publication Date: 2009-06-24
STORA ENSO OYJ
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In other words, packages made of polymer-coated sheets take on a different appearance when autoclaved, which is a disadvantage in the market, especially in demanding applications

Method used

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  • Product package, packaging material and use of the packaging material
  • Product package, packaging material and use of the packaging material
  • Product package, packaging material and use of the packaging material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Samples of fiber-based packaging material were tested in an autoclave with saturated steam at a temperature of 130°C. The fibrous base of the material consists of packaging board made of bleached pulp with a weight of 250g / m 2 . Test material 1 also consisted of this material. Test material 2 consisted of said panels with a passing weight of 20 g / m 2 A layer of low-density polyethylene (LDPE) (used as an adhesive) was laminated with aluminum foil on the other side of the board. Test materials 3-11 were layered packaging materials whose substrate consisted of test material 2, in which on the side opposite to the aluminum foil a single layer of polymer coating was provided on the plate. The polymers of this layer are polyethylene (test material 3), polypropylene (test materials 4 and 5), blends of 70% polypropylene and 30% polyethylene (test materials 6 and 7), 92% of the above mentioned polypropylene and polypropylene Colored mixture of ethylene mixture and 8% titani...

Embodiment 2

[0043] According to Example 1, a series of tests were carried out on a material in which the fibrous substrate consisted of packaging board made of bleached pulp with a weight of 210 g / m 2 (Test material 1). On one side of the board, with the aid of a weight of 20g / m 2The LDPE adhesive layer is laminated with aluminum foil (test material 2), while on the other side of the board there are additionally two layers of polymer coating, the inner layer of which contains a mixture of 70% polypropylene and 30% polyethylene, where Various amounts of titanium dioxide were added and the outer layer was pure polypropylene (test materials 3-12). The moisture content of the fibrous substrate and the brightness of the polymer-coated side of the material measured before and after autoclaving are shown in Table 2. Also included in the table are the pigmented inner polymer layer and the unpigmented outer polymer layer, respectively.

[0044] Table 2

[0045]

[0046] The results show tha...

Embodiment 3

[0048] In this example, a test series was carried out using a test material free of aluminum, the fibrous substrate of which consisted of packaging board made of bleached pulp, weighing 210 g / m 2 (Test material 1). One side of the board is coated with a polymer layer in which 7.5% titanium dioxide is mixed in polypropylene, the layer weight is 58g / m 2 (Test material 2). The other side of the panel is coated with an unpigmented polymer coating (test materials 3-6), or has a layered structure consisting of two or three consecutive unpigmented polymer layers (test materials 7-11) . The materials of the coating are: polypropylene (test materials 3 and 4); a mixture of 70% polypropylene and 30% polyethylene (test materials 5 and 6); a two-layer structure (test material 7), wherein the inner layer is COC (Topas 8007D), the outer layer is the blend of polypropylene and polyethylene; three-layer structure (test materials 8 and 9), its innermost layer is polyamide, followed by adhes...

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Abstract

The present invention relates to a polymer-coated heat-sealable packaging material, to a heat-sterilizable package made of this material, and to the use of this packaging material. The material comprises a fibrous substrate 4, eg packaging board made of bleached pulp, and polymeric heat seal layers (1, 9) on both sides of the fibrous substrate. According to the invention, the package comprises: a polymeric coating (2) on the outside of the fibrous substrate, which polymer coating contains white pigments that hide the fibrous substrate from view, and a second coating containing light-absorbing pigments (8). A coating that is colored gray on the inside of a fibrous substrate, for example, to provide an opacity layer for packaged products. In order to stabilize the brightness of the material, a light-absorbing black pigment can also be arranged outside the fiber base material under the white layer. The packaging can be, for example, a food packaging heat-sterilized in an autoclave, wherein yellowing of the fiber-based material can be avoided by means of white pigments.

Description

technical field [0001] The present invention relates to heat-sealable and heat-sterilizable product packages made from polymer-coated fiber-based packaging materials. The invention also relates to a packaging material suitable for the packaging, and to the use of this material. Background technique [0002] There are a large number of known applications of polymer-coated fibre-based packaging materials in which one or both sides of a fibrous substrate is provided with one or more continuous coatings, the packaging materials being intended for different packaging purposes. The coating optionally obtains a moisture-, oxygen-, and / or light-blocking layer that seeks to increase the shelf life of the packaged product, thereby prolonging its effective shelf life and / or "best before date" . The coating also provides a heat seal material capable of sealing product packaging. Food packaging constitutes a major field of application for this packaging material, and they are used, fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B65D65/40B32B27/20B32B27/10B65D81/34B65D81/24B65D81/30B32B
Inventor 塔帕尼·彭蒂南基莫·尼瓦莱南伊斯托·海斯卡南安蒂·萨沃莱南朱尔卡·库西帕洛埃萨·科里萨洛厄基·莱胡马库·赛尼奥托米·莱希科伊南
Owner STORA ENSO OYJ
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