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Multi-walled, sack-type packaging

A bag-like, medium-sized technology, applied in the direction of packaging, transportation and packaging, bags, etc., can solve the problems of increased mechanical strength and inability to completely inhibit moisture penetration

Inactive Publication Date: 2010-06-02
WACKER CHEM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, although the mechanical strength is greatly increased compared with the paper bag, due to the large area of ​​pores, the penetration of water cannot be completely suppressed.

Method used

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  • Multi-walled, sack-type packaging
  • Multi-walled, sack-type packaging
  • Multi-walled, sack-type packaging

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] figure 1 A perspective view of a bag 1 is shown in the empty state, the bag 1 having a first wide side 2 (rear side) and a second wide side 3 (front side), a first region 4 and a second region 5 . The bag is closed at the ends 6 and 7, a filling opening 8 (not shown) for filling the bag 1 is provided in the region of the end 6 (upper end) to receive a filling tube.

[0026] Such as figure 2 As shown, the bag 1 has a gas permeable inner wall 9 surrounded by a gas impermeable outer wall 10 . The outer wall 10 is designed to overlap in a sub-region 11 such as the first wide face 2, and the overlapping first edge 12 and second edge 13 are airtightly sealed by a first seam 14 and a second seam 15 such as a weld. Engaged with the outer wall 10 .

[0027] In this case, preferably, the first seam 14 is interrupted in the upper 1 / 3 of the area 16 forming the air outlet 17 . The inner and outer wall areas 10a of the overlapping sub-area 11 abut against the second seam 15, th...

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PUM

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Abstract

The invention relates to multi-layered, sack-type packaging (1), configured from a respective broad front face (3) and rear face (2), which are connected by narrow lateral faces (4) and (5), said packaging being sealed at the upper end (6) and the lower end (7) with part of the upper end (6) remaining open (8) for filling. Said packaging comprises an inner wall (9) consisting of an air-permeable material, said wall being surrounded by an outer wall (10) consisting of an airtight material. Said packaging is characterised in that: a) on the front (3) and / or rear face (2), the outer wall (10) hasan overlapping sub-section (11) extending over up to 50 % of the total surface area; b) in said overlapping section (11), the inner layer (10a) of the outer wall (10) is perforated; c) the two overlapping layers (10a und 10b) are connected by seams (14 and 15) at the edges (12 and 13) of the overlapping section (11); and d) on one or both edges (12 and 13) the connection is interrupted in an area(16) covering between 10 and 50 % of the total length.

Description

field of invention [0001] The present invention relates to multi-wall pouch-type packaging for granular materials, especially powdered materials. Background technique [0002] Powdered materials such as polymer powders are shipped to market in packages called ziplock bags. In this case, the filling is carried out by means of a filling machine, which operates at a high throughput rate and feeds the powder in a fluidized state with a large amount of air into the bag. Here, the air must escape from the bag as quickly as possible. In the past, the packaging material used was paper bags made of kraft paper, as the air could escape through the paper and the powdery filling was left behind. However, paper bags have the disadvantage that they are not sufficiently resistant to water spray and humidity and are sensitive to mechanical loads. [0003] In order to overcome these shortcomings, multi-wall ziplock bags are currently used, the inner side of the multi-wall ziplock bag is c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B65D30/08B65D33/01
CPCB65D33/01B65D31/04
Inventor F·林德鲍尔
Owner WACKER CHEM GMBH