Check patentability & draft patents in minutes with Patsnap Eureka AI!

Polymer-coated heat-sealable packaging material, method for manufacturing the same and a closed package made thereof

A packaging material and sealing packaging technology, which is applied to special packaging objects, packaging, wrapping paper, etc., can solve problems such as insufficient water vapor barrier properties, and achieve the effect of strengthening protection

Inactive Publication Date: 2007-06-13
STORA ENSO OYJ
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Based on the observations stated above, the object of the present invention is to solve the problems caused by existing fibre-based packaging materials and the insufficient water vapor barrier properties of the packages from these joints

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Polymer-coated heat-sealable packaging material, method for manufacturing the same and a closed package made thereof
  • Polymer-coated heat-sealable packaging material, method for manufacturing the same and a closed package made thereof
  • Polymer-coated heat-sealable packaging material, method for manufacturing the same and a closed package made thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Preparation of an extrusion coated packaging board with layer structure: LDPE layer, weight 5g / m 2 , HDPE layer, weight 15g / m 2 , bottom plate, weight 190g / m 2 , HDPE layer, weight 15g / m 2 And LDPE layer, weight 5g / m 2 . At a temperature of 38° and a relative humidity of 90%, the water vapor permeability of the paperboard was measured to be 6.4g / m 2 / d. The cardboard had significantly less curl.

Embodiment 2

[0043] Prepare an extrusion coated packaging board with layer structure: LDPE layer, weight 10g / m 2 , HDPE layer, weight 10g / m 2 , bottom plate, weight 255g / m 2 , HDPE layer, weight 20g / m 2 And LDPE layer, weight 25g / m 2 . At a temperature of 38° and a relative humidity of 90%, the water vapor permeability of the paperboard was measured to be 4.6g / m 2 / d. The result is the average of the permeability values ​​measured in different directions.

Embodiment 3

[0044] Embodiment 3 (reference)

[0045] For reference, an extrusion coated paperboard was prepared with the layer structure: LDPE layer, weight 20g / m 2 , bottom plate, weight 255g / m 2 , HDPE layer, weight 20g / m 2 And LDPE layer, weight 20g / m 2 . The paperboard has an average water vapor permeability of 5.5g / m 2 / d. The paperboard was significantly more curled than the paperboard described in Examples 1 and 2.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
densityaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention relates to a manufacturing method of a heat-sealable packaging mate-rial, a polymer-coated packaging material manufactured using the method, and a sealed package to be manufactured of the material. The packaging material com-prises a fibre base, such as a packaging board (5), and an inner, extruded water va-pour barrier layer (2, 9) on both sides, containing high-density polyethylene (HDPE), and an outer heat sealing layer (1, 10), the material of which is, for example, low-density polyethylene (LDPE). Further, polymeric oxygen barrier layers (7) can be incorporated in the packaging material, the material of the oxygen barrier layers being, for example, ethyl vinyl alcohol copolymer (EVOH) or polyamide (PA). With the HDPE layer, the permeation of water vapour is prevented to both di-rections, and the location of the extruded layers on both sides of the fibre base re-duces the curling of the material. The packages according to the invention comprise carton, box and bag packages for dry and liquid foods.

Description

technical field [0001] The invention relates to a process for the production of a heat-sealable packaging material, in which process a fibrous substrate is provided on both sides with a polymeric heat-sealing layer. Furthermore, the invention relates to the polymer-coated packaging material obtained by this method and to a package produced therefrom by folding and heat sealing. Background technique [0002] Impermeability is especially required for packaging materials used to package food products in order to prevent premature spoilage of the product. Typically, both oxygen and water vapor impermeability are required for liquid foods such as dairy products and fruit juices, while good water vapor impermeability alone is an essential requirement in the packaging of certain dry foods. Unlike oxygen impermeability, water vapor impermeability can be very important not only for the protection of the packaged product, but also for the protection of the packaging material itself, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/10B65D65/40B65D30/02B29C47/06B29K23/00B29L9/00B32B27/12B32B27/32
CPCY10T428/1307Y10T428/31993B32B27/12Y10T428/24942B32B27/32Y10T428/31982Y10T428/31971Y10T428/31986Y10T428/1303B32B2439/62B32B2439/70B32B2323/046B32B2323/043B32B2307/7246B32B2307/7244B32B2439/46B32B7/12B32B37/153B32B2307/31B32B2250/40B32B2250/242
Inventor T·彭蒂宁K·内瓦莱宁J·耶尔维宁
Owner STORA ENSO OYJ
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com