Compression Molding of All-Thermoplastic Composites by Using Fiber Wastes

2007 ◽  
pp. 81-84
Author(s):  
Tomoaki Kaneda ◽  
Teruo Kimura
Keyword(s):  
Compression Molding ◽  
Thermoplastic Composites

High flow compression molding for recycling discontinuous long fiber thermoplastic composites

2020 ◽  
Vol 54 (23) ◽  
pp. 3343-3350
Author(s):  
Éric Léger ◽  
Benoit Landry ◽  
Gabriel LaPlante
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Compression Molding ◽  
High Flow ◽  
Low Flow ◽  
Thermoplastic Composites ◽  
Direction Parallel ◽  
Significant Difference ◽  
Long Fiber Thermoplastic ◽  
Flow Compression

An investigation into high flow compression molding for recycling thermoplastic discontinuous long fiber composites is presented. High flow recycled panels and conventional low flow baseline panels were produced with a large rectangular (2:1 aspect ratio) mold. Flow was induced in the recycled panels by stacking cut sections of conventionally produced baseline panels in the center of the mold cavity, representing 25% initial coverage. High flow compression molded panels were found to exhibit significantly higher than baseline tensile strength (+50%) and modulus (+31%) when tested in the direction parallel to flow. When tested in the direction perpendicular to flow, the opposite effect was found, with reductions in tensile strength (−42%) and modulus (−37%). However, when the average results of both directions are compared to baseline, no significant difference was found between the recycled and baseline panels. This severe anisotropic redistribution of mechanical properties suggests chip orientation is affected by flow. Additionally, micrographic analysis revealed that high flow molding induces intra-ply chip shearing and a reduction in resin rich regions within panels. Baseline panels also exhibited in-plane anisotropy, despite initial random distribution of chips and no or near no flow induced during molding. In this case, mechanical properties favored the direction perpendicular to that of the recycled panels.

Compression Molding of All-Thermoplastic Composites by Using Fiber Wastes

2007 ◽  
Vol 334-335 ◽  
pp. 81-84
Author(s):  
Tomoaki Kaneda ◽  
Teruo Kimura
Keyword(s):  
Mechanical Property ◽  
Textile Industry ◽  
Bending Strength ◽  
Compression Molding ◽  
Polyester Fiber ◽  
Thermoplastic Composites ◽  
Molding Method ◽  
Thermal Insulating ◽  
Number Of Layers ◽  
Pitch Distance

In the textile industry, recently, it is urgent to develop the recycling system of the polyester fiber waste which results from the manufacturing process of sythetic fabric. However, most of the fiber wastes are destroyed by fire or buried underground. In this paper, the insulating composites which consist of polyester fiber wastes and PLA films are molded by compression molding method. In the process of preforming, the polyester fiber wastes are arrayed in uni-direction, and PLA films are inserted among layers of the polyester fiber wastes as binder. Namely, the polyester fiber wastes layers and PLA films are laminated alternately. In this paper, pitch (distance among the fiber wastes) and number of layers of polyester fiber wastes are varied, and the effect of pitch and number of layers of polyester fiber wastes on mechanical property and thermal insulating propertiy of the composites are discussed. As the result, it is concluded here that the melted state and the thickness of layers of PLA affect largely on the thermal conductivity and the bending strength of the boards.

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