Poly(ethylene terephthalate)/polypropylene/bamboo charcoal (PET/PP/BC) thermoplastic composites were prepared by melt compounding and then injection molding. The functionalities of the composites, such as electrical resistivity, electromagnetic shielding effectiveness (EMSE), far-infrared ray radiativity (FIRR) and negative ion concentration, were evaluated in the study. The surface resistivity and volume resistivity of the functional composites were 2.47 - 9.12×1011 Ω/sq and 5.8 - 7.01×1010 Ωcm, respectively, while composites containing 6 wt% BC or above. The EMSE of the composites were below 10 dB at frequency ranged from 300 kHz to3 GHz. The average FIRR of the composites was 0.85 at BC concentration of 8 wt%. Incorporation of BC into the composites increased the negative ion concentration of about 30 pcs/cc compared to those without BC. However, it is lower than the positive ion concentration in the air.

In order to fabricate textiles with electromagnetic shielding effectiveness (EMSE) and far infrared emissivity, we fabricated bamboo charcoal/metal (BC/M) composite wrapped yarns with metal wires (stainless steel wires or copper wires) as the core yarn and bamboo charcoal textured yarn as the wrapped yarns using a rotor twister machine. The optimum manufacture parameters included: the speed of the rotor twister was 8000 rpm and the wrapped amounts of the BC/M composite wrapped yarns were 4 turns/cm. The BC/M composite wrapped yarns were made into the BC/M composite woven fabrics using a loom machine. Moreover, we tested the BC/M composite woven fabrics in EMSE and then changed the lamination angles. When the lamination amount was 6, laminated angles were 0°/45°/90°/-45°/0°/45°, 0°/ 90°/0°/ 90°/0°/ 90°, and the frequencies of the incident waves were between 1.83 and 3 GHz, the EMSE of the BC/M composite woven fabrics reached 50 to 60 dB which was satisfactory.

Geotextiles made of nonwoven fabrics can be used in different fields, such as groynes, dams, seawalls, revetments, dunes, and hillsides, and the structures of nonwoven fabrics can be changed accordingly. This study explores the influence of different content of Kevlar fibers on the mechanical and physical properties of Kevlar/Polyester (PET) complex nonwoven fabrics. As specified in a nonwoven fabric manufacturing process Kevlar fibers and PET fibers are blended with various ratios to form Kevlar/PET complex nonwoven fabrics, which are then tested for tear strength, air permeability, and water permeability. The experiment results show that increasing Kevlar fibers reduces the tear strength, air permeability, and water permeability.

The nonwoven waste coming from textile industry takes up 5% of the total waste amount, so to recycle and to regenerate the waste is the prior obligation of the factory to reduce the waste. Nonwoven selvages waste can be buried or burnt but these two methods result in environmental pollution. This research proposes to reuse these waste nonwoven selvages effectively, and is designed as follows. Each piece of thermal-bonding material comprised a sandwich structure, with two layers of 7.0d PET matrices enclosing a layer of PP nonwoven selvage and nylon geogrid. After needle-punching and thermal-pressing, it forms a laminate structure of PET nonwoven/ PP selvage/ PET nonwoven in that it decreases the impact by the environmental pollution and protects the environment ultimately. In addition, thermal-bonding reinforces the mechanical properties of the composite fabric structure. The results of the experiment suggest the optimum manufacture parameters (selvage content: 10 %; thermal-bonding temperature: 220°C; needle-punching density: 400 needles/ cm2). The composite fabric undergoes the burst strength test and permeable coefficient measurement, evaluating its applications in geotextile filed.

In this study, a multi-layer blending machine was designed to mix cotton evenly. Being put inside via the feeding port, cotton was spread evenly by the oscillator which moves from left to right back and forth successively. Subsequently, cotton was stored as the multi-layer fibrous cotton in the rear reserve tank. Delivered by the first and the second conveyer belt, the fibrous cotton was sent to the front storage chamber to be cut by a lattice which pulled and dragged the marching cotton vertically. Finally, the processed cotton was rolled out by a striper roller, falling at a certain spot as scheduled, after which spread and blended evenly and thoroughly.