Electromagnetic Shielding Boards Produced with Tetra Paks Waste & Metal Fibers

2012 ◽  
Vol 518-523 ◽  
pp. 3349-3357 ◽  
Author(s):  
Chang Yan Xu ◽  
Jie Liu ◽  
Xu Dong Zhu
Keyword(s):  
Mechanical Properties ◽  
Volume Resistivity ◽  
Electromagnetic Shielding ◽  
Shielding Effectiveness ◽  
Fiber Layer ◽  
Composite Board ◽  
Food And Beverage ◽  
Alternative Material ◽  
Interior Finish ◽  
Beverage Packaging

Just like other paper/plastic/aluminum (PPA) composites, Tetra Pak-package-material (Tetra Paks) has excellent water and vapor barrier abilities, and is widely used in food and beverage packaging industry. However, serious environmental problem follows due to its long service life. In this paper, a novel electromagnetic shielding composite board was developed with recycled Tetra Paks and copper-iron mixed fibers. The influence of Cu/Fe ratio and mat configuration on board shielding effectiveness (SE), volume resistivity (VR) and mechanical properties were investigated. The results showed that the boards with copper-iron mixed fiber layers showed better electromagnetic shielding performance than those with only iron or copper fiber layer. The SE of the boards was improved with higher copper fiber content. The location of the metal fiber layers in the mat had a significant influence on board electromagnetic shielding performance. A symmetrical sandwich structure was found beneficial to better shielding performance, and in the same condition of wave frequency and shielding material thickness, the shielding system with a Fe core exhibited better shielding performance than that with a Cu core. The ratio of Cu/Fe and the configuration of mat both had significant influences on mechanical properties of the boards. It can be concluded that qualified electromagnetic shielding composite board could be produced with Tetra Paks wastes and copper-iron mixed fibers. Showing both environmental and economic values, this type of board could be considered as an alternative material used in packaging, interior finish, furniture, and other applications.

Production of Electromagnetic Shielding Boards Using Paper/Plastic/Aluminum Packaging Waste & Copper Fibers

2012 ◽  
Vol 200 ◽  
pp. 254-258 ◽  
Author(s):  
Chang Yan Xu ◽  
Jie Liu ◽  
Xu Dong Zhu
Keyword(s):  
Fiber Length ◽  
Volume Resistivity ◽  
Barrier Properties ◽  
Electromagnetic Shielding ◽  
Fiber Content ◽  
Raw Material ◽  
Shielding Effectiveness ◽  
The Public ◽  
Packaging Waste ◽  
5 Ghz

Paper/plastic/aluminum (PPA) multilayer composite is one of the most favorable packaging material for milk and yoghourt because of its excellent material properties, especially the unbreakability, machinability and barrier properties towards moisture, oxygen and light. Ecological demands on littering and on carbon footprint gave pressure on the public community. Together with the increasing amount of PPA packaging containers all over the world, the recollection and recycling of PPA packages was steadily increasing. In this paper, an electromagnetic shielding board was produced with Tetra Pak waste and copper fibers. Electromagnetic shielding effectiveness (SE) and volume resistivity (VR) were investigated. It was found that SE increased with the increased copper fiber content but declined with the increases copper fiber length. However, VR showed an opposite tendency. In the condition of 100 g/m2 copper fiber content and 3-4 mm fiber length, the board showed good shielding performance, e.g., in the range of 9 KHz 5 GHz frequency, the average SE was up to 24.11 dB, and in the range of 600 MHz 1000 MHz frequency, the maximum SE came up to 58.91 dB. Based on the findings of this study, a conclusion could be made that manufacturing electromagnetic shielding boards using PPA packaging waste should be regarded as a step in the prevention of the environmental pollution and as a method of achieving economical worth from these items, and this type board could be considered as an alternative raw material with accepted properties to be used in packaging, interior finish, furniture, and other applications.

Preliminary Study of Polypropylene/Coir/Carbon Black Conductive Wood Plastic Composite

2012 ◽  
Vol 557-559 ◽  
pp. 338-341 ◽  
Author(s):  
Ching Wen Lou ◽  
Ruey Bin Yang ◽  
Ching Wen Lin ◽  
Chien Lin Huang ◽  
Chia Chi Fan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Black ◽  
Conductive Polymer ◽  
Electromagnetic Shielding ◽  
Living Environment ◽  
Polymer Materials ◽  
Shielding Effectiveness ◽  
Plastic Composite ◽  
Popular Subject ◽  
Electromagnetic Shielding Effectiveness

Our living environment is full of diverse electronic products, making conductive polymer a popular subject for researchers. Insulating polypropylene (PP) can be improved in terms of conductivity by intermingling with electroconductive materials. Carbon black and carbon fiber are two materials that can supplement electroconductive and mechanical properties in insulating polymer materials. In this study, natural coir is first alkali-treated and then melt-blended with PP and carbon black, forming the composite. The resulting composite is tested in terms of its electromagnetic shielding effectiveness and mechanical properties. According to the results, when the amount of carbon black is 12 wt% and coir 3 wt%, the composite displays the optimum electromagnetic shielding of -23.56 dB, tensile strength of 37.07 MPa, and flexural strength of 47.21 MPa.

scholarly journals Erratum to: Electromagnetic shielding effectiveness and mechanical properties of graphite-based polymeric films

2016 ◽  
Vol 122 (9) ◽  
Author(s):  
G. Kenanakis ◽  
K. C. Vasilopoulos ◽  
Z. Viskadourakis ◽  
N.-M. Barkoula ◽  
S. H. Anastasiadis ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Electromagnetic Shielding ◽  
Polymeric Films ◽  
Shielding Effectiveness ◽  
Electromagnetic Shielding Effectiveness

Electromagnetic shielding effectiveness and mechanical properties of graphite-based polymeric films

2016 ◽  
Vol 122 (9) ◽  
Author(s):  
G. Kenanakis ◽  
K. C. Vasilopoulos ◽  
Z. Viskadourakis ◽  
N.-M. Barkoula ◽  
S. H. Anastasiadis ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Electromagnetic Shielding ◽  
Polymeric Films ◽  
Shielding Effectiveness ◽  
Electromagnetic Shielding Effectiveness

Electrical Conductivity and Electromagnetic Shielding Effectiveness of CB/ABS Composites

2011 ◽  
Vol 675-677 ◽  
pp. 461-463
Author(s):  
Hai Ping Duan ◽  
Yu Ping Duan
Keyword(s):  
Electrical Conductivity ◽  
Carbon Black ◽  
Mass Fraction ◽  
Acrylonitrile Butadiene Styrene ◽  
Volume Resistivity ◽  
Electromagnetic Shielding ◽  
Shielding Effectiveness ◽  
Percolation Effect ◽  
Electromagnetic Shielding Effectiveness ◽  
Butadiene Styrene

In this paper, the effects of carbon black (CB) mass fraction on volume resistivity and electromagnetic shielding effectiveness (SE) of CB/Acrylonitrile Butadiene Styrene (ABS) composites were studied. The results indicated that when CB mass fraction was over 15 wt%, the volume resistivity dropped sharply and when it rose to 35 wt%, the volume resistivity achieved the lowest value about 103Ω·cm. In addition, there are two obvious percolation effect at 15~20 wt% and 25~35 wt% CB respectively in the course of the volume resistivity changing. Titanate coupling agent could greatly improve conduction and SE of CB/ABS composites. Lastly, the SE of CB/ABS composites was investigated by experimental observation.

The Research on Wood Fiber/Stainless Steel Net Electromagnetic Shielding Composite Board

2012 ◽  
Vol 525-526 ◽  
pp. 437-440
Author(s):  
Chu Wang Su ◽  
Quan Ping Yuan ◽  
Wei Xing Gan ◽  
Jing Da Huang ◽  
Yuan Yi Huang
Keyword(s):  
Stainless Steel ◽  
Bending Strength ◽  
Urea Formaldehyde ◽  
Wood Fiber ◽  
Electromagnetic Shielding ◽  
Formaldehyde Resin ◽  
Shielding Effectiveness ◽  
Composite Board ◽  
The One ◽  
Internal Bonding Strength

In this paper, the electromagnetic shielding function composite fiberboards were made by filling with stainless steel nets dipped with urea-formaldehyde resin adhesive (UF) and the influence of different mesh and layers of nets on its electromagnetic shielding performance, static bending strength (MOR), modulus of elasticity (MOE) and internal bonding strength (IB) were studied. The results showed that: when the mechanical strength was enough and the frequency was in range of 50MHz to 1GHz, of all the composite fiberboards filled with one-layer stainless steel net, the one filled with 60 mesh was best and the minimum shielding effectiveness (SE) was 36.22 dB; when filled with two-layers nets, the one filled with 80 mesh was best and the minimum SE was 42.54dB; when filled with three-layers nets, the one filled with 60 mesh was best and the minimum SE was 50.77dB.

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