Yi Chang Yang

Manufacturing Technique and Physical Property of Metal Wires/ PP Nonwoven Selvedges Complex Ply Yarns and Knitted Fabrics

In this study, nonwoven selvedges served as core yarn which was wrapped with stainless steel wires. Core yarn was added with functional materials such as stainless steel wires or copper wires or both. Functional polypropylene nonwoven selvedges (PNS) complex ply yarns were made using a rotor twister machine. The wrapped density of stainless steel wires was changed as 0.5, 1.5, 2.5, 3.5 and 4.5 turns/cm and the speed of rotor twister was set at 8000 rpm. Shown in the mechanical property test of complex ply yarn, when speed of rotor twister was at 8000 rpm; wrapped density was 2.5 turns/ cm; and functional materials were copper wires and stainless steel wires, complex ply yarns made of polypropylene nonwoven selvedges (PNS) had the maximum breaking force as 47.76N and maximum breaking elongation as 47.93%.

Mechanical Evaluation of the Production of Bamboo Charcoal/ Stainless Steel Complex Yarns and Knitted Fabrics

In this study, bamboo charcoal/ stainless steel complex yarns was made of stainless steel wires and polyester bamboo charcoal filaments using a rotor twister machine. The stainless steel wires served as the core yarns while the polyester bamboo charcoal filaments served as the wrapped yarns. The speed of rotor twister was set as 7000 to 11000 rpm and wrapped counts were 2 to 7 turns/ cm. Bamboo charcoal/ stainless steel complex yarns were with the tenacity as 3.08 g/d when manufacture parameters were speed of rotor twister as 8000 rpm and wrapped counts as 4.0 turns/ cm; moreover, when speed of rotor twister was at 7000 rpm and wrapped counts was 5.0 turns/cm, bamboo charcoal/ stainless steel complex yarns received the tensile strain as 24.91%. According to tensile strength test for knitted fabrics, when wrapped count was 4 turns/ cm, the knitted fabrics had its tensile strength as 214.49 N, and the vertical tensile strength was higher than the horizontal one. When the wrapped counts of bamboo charcoal/ stainless steel complex yarns was 6 turns/ cm, the knitted fabrics attained its tensile strain at 236.87%.

The Process and Property Characteristic of Electromagnetic Shielding Functional Warp Knitted Composite Fabrics

The scientific progress has improved human life quality, meanwhile todays high-stress lifestyle has resulted in a rising demand for health care and well-being products. The high technology products and innovation make our life more convenient and at the same time the negative effects, such as electrostatic and electromagnetic wave. High electromagnetic wave affects the human body in different ways. Technological innovation and product aesthetics are both important for modern life quality. Companies have invested in research, development and essential household items to improve the lives such as thermal retentivity and antistatic. In this study, PET fiber was used as warp, and PET fiber, bamboo charcoal nylon fiber and stainless steel fiber employed as weft to weave three groups of resilient warp knitted fabrics. Then various examination have been conducted, including electromagnetic shielding effectiveness, tensile strength test, tearing strength test, burst strength test. The results indicate that the electromagnetic shielding effectiveness of bamboo charcoal / stainless steel resilient warp knitted fabrics attained 35 dB and the shielding achieved 99.9 %. The tensile strength of bamboo charcoal / stainless steel resilient warp knitted fabrics (weft) reached 26 MPa.

The Influence of Fabric Structures of the Woven Fabrics on Electromagnetic Shielding Effectiveness

Stainless steel (SS) blended yarns with electromagnetic interference (EMI) were made into woven fabrics, after which the fabrics were evaluated with electromagnetic shielding effectiveness (EMSE). Parameters of laminated angle and the lamination number layers affected the fabrics’ EMSE differently. In addition, density of unidirectional SS yarns affected EMSE in frequency range of 200 to 500 MHz , so as the density of cross SS yarns on a frequency over 1000 MHz.

Manufacturing Technique and Property Evaluations of Conductive Nonwoven Fabrics

Conductive textiles can be used in diverse fields, such as antistatic materials, sensors, materials for electromagnetic shielding and biomedical. This study produces nonwoven fabrics with polylactic acid (PLA) and polyaniline (PAN) and the resulting PLA/PAN nonwoven fabrics are evaluated with electromagnetic shielding effectiveness (EMSE) and air permeability. Polylactic acid (PLA) and low melting point polylactic acid (LPLA) are made into nonwoven fabrics, which are then spray-coated with different amount of PAN solution to form PLA/PAN nonwoven fabrics. The fabrics are laminated with various numbers of layers, and then thermally pressed. The experiment results show that the PAN amount and lamination number are proportional to the EMSE of the PLA/PAN nonwoven fabrics.

Manufacturing Technique and Property Evaluation of Resilient Nonwoven Fabrics

This study creates the high resilience nonwoven fabrics by using modified polyester fiber. In order to have resilience, the nonwoven fabrics are thermally bonded with various temperatures and the air permeability and mechanical properties of the nonwoven fabrics are then evaluated. The optimum tensile strength of 481 N and resiliency of 26 cm occur when the nonwoven fabrics are thermally bonded at 180 °C, and the optimum tear strength of 276 N occurs when the nonwoven fabrics are thermally bonded at 160 °C.

Preliminary Research of Composite Dressing Fabric

The dressing is used to prevent the bacterial infection when trauma is in contact with the outside air, to inhibit vivo moisture loss and then to accelerate wound healing. So the dressing nonwoven fabric needs to have good vapor permeability, comfortableness and flexibility. In addition, the far infrared fiber has ability to accelerate the wound healing. Therefore, in this research, the far infrared fiber and absorbent cotton were used to produce composite dressing fabric. By changes of blending contents of the above two fibers, the properties of dressing fabrics including vapor permeability, water absorption and flexibility were all evaluated for future application.

Pilot Study of PET/Bamboo Charcoal Warp-Knitted Fabric

In recent years, as improvement of human living life, people begin to focus on themselves health. It is certain that bamboo charcoal has many properties, including water purification, deodorization, anion release and far-infrared ray radiation. This study aims to prepare PET/BC warp-knitted fabric composed of polyester yarn (PET) as warp yarn and bamboo charcoal polyamine yarn (BC) as weft yarn using Velcro Crochet Machine. Afterwards, air permeability, elastic resilience and far-infrared ray emissivity of resulting knitted fabric were discussed by changing weft yarn type. Result shows that, for knitted fabrics, weft yarn type cannot affect the elastic resilience; yet PET weft yarn makes air permeability decreasing.

The Application of Geometric Form in Clothing Design

The design of geometric form is widely used in daily life, such as Product Design, Communication Design and Digital Animation. In fact, it is an indispensable element of artistic creation. However, there is still a large possibility to explore for clothing design. This study discusses the relationship between the features of geometric form and clothing patterns. Through the works of fashion designers analyse the techniques used and the possibility of development. In order to break the traditional concepts of pattern making and to dismantle the patterns, the geometric form was used as the basic structure to create a three-dimensional silhouette. As a result, the clothing would produce visual effects with the movement of body. The overall design process and creative outcomes contribute researchers different design thinking for further study and development.

The Evaluation of Physical Property and Manufacturing Process of Functional Warp Knitted Fabrics with Variation of Weft

In recent years, the scientific progress has improved human life quality and changes the concepts of heath and heath care. It has been approved that the bamboo charcoal has various functions, including air cleaning, water purification, deodorization, far infrared radiation rate and anion amount. The bamboo charcoal fiber and bamboo charcoal yarn are applied extensively in the textile industry. In this study, PET fiber was used as warp, and PET fiber, bamboo charcoal nylon fiber and stainless steel fiber employed as weft to weave three groups of warp knitted fabric. The variation of far infrared radiation rate, anion amount concentration, air permeability, water absorption, flexibility of these three groups of fabric were examined. The results indicate that the far infrared radiation rate of these three groups of fabric attained 0.8. The anion amount concentration of bamboo charcoal and bamboo charcoal / stainless steel warp knitted fabrics has reached 490-495. Finally, the air permeability of bamboo charcoal / stainless steel warp knitted fabrics achieved 281 cm3/s/cm2.