Composite Packaging Material for Building Sacks
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Solution Overview
Problem
The existing packaging materials with high strength, such as those used for building materials like cement, are expensive due to the requirement of a fleece with a basis weight of over 80 g/sqm for sufficient load-bearing strength, which is necessary for transporting materials weighing 15 to 50 kg.
Innovation Solution
A packaging material is developed using a nonwoven fabric with a basis weight of 10 to 100 g/m², combined with a fibrous material web, both connected with a polyolefin-based connecting agent, to achieve comparable strength at a lower cost, and optionally including a third layer of plastic film for enhanced moisture barrier and ventilation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a nonwoven fabric with high basis weight (over 80 g/m²) is used to provide sufficient strength for transporting building materials, then the load-bearing capacity is improved, but the manufacturing cost increases
Solution Approach 1:
The patent combines a nonwoven fabric with a fibrous material web to create a composite structure. The nonwoven fabric provides a base structure while the fibrous material web reinforces the load-bearing capacity. This composite approach allows achieving the required strength for transporting building materials (15-50 kg) without needing a single high-basis-weight nonwoven fabric, thus reducing manufacturing costs while maintaining sufficient strength
Solution Approach 2:
The patent changes the basis weight parameter of the nonwoven fabric from the conventional high value (>80 g/m²) to a lower range (10-100 g/m², preferably 15-60 g/m²). By optimizing this parameter and combining it with a fibrous material web, the invention achieves the necessary strength at lower cost, directly addressing the contradiction between strength requirements and manufacturing cost
2Ease of manufacture
If a nonwoven fabric with basis weight of 10 to 100 g/m² is used to reduce cost, then the manufacturing cost is reduced, but the load-bearing capacity may be insufficient
Solution Approach 1:
The patent creates a composite material system where a lighter nonwoven fabric (10-100 g/m²) is combined with a fibrous material web. The fibrous material web acts as a reinforcement layer that compensates for the reduced basis weight of the nonwoven fabric, ensuring that the composite structure achieves sufficient load-bearing capacity for transporting building materials while maintaining cost advantages
3Object-affected harmful factors
If a plastic sheet is added to provide moisture barrier, then the moisture protection is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent incorporates a plastic film layer within the multi-layer structure to provide moisture barrier properties. This thin film layer integrates into the existing composite structure of nonwoven fabric and fibrous material web, providing effective moisture protection without significantly increasing overall structural complexity. The plastic film serves as a functional barrier layer that is compatible with the flexible, formable nature of the packaging material
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration provides a cost-effective packaging solution with sufficient strength for building material transport, improved moisture barrier properties, and effective ventilation, while being easier to recycle and produce.
Implementation Method 1
both layers are bonded together by means of a bonding agent
Data Source
Figure 1~4
Figure 5~6e
Figure 7
AI summary
The invention relates to a packaging means, especially a sack-shaped packaging means, comprising a packaging material which is arranged in at least two layers, said packaging material having at least two layers, wherein one layer comprises a non-woven fabric. The second layer comprises a fibre-containing material.