Table of Content - JFBI 4.4

The compound technological project Croatian Anthropometric System is a national project. The anthropometric measurement of the population of the Republic of Croatia was performed within this project with the aim of adopting the Croatian Anthropometric System as the basic document for the size designation system of clothes and footwear. The measurements of anthropometric characteristics as well as collecting data under social and economic conditions were carried out by previous teams. The successful implementation of this project includes strategic planning, which includes an adequate selection of associates, planning and proper organization, precise distribution of tasks, synchronization of the dynamics of their performances and interactive way of managing the project implementation process. In managing research projects, a strategic management approach also includes the connection and harmonization of diverse knowledge, specific methodologies and specific professional interests of members of a (often multidisciplinary) team of scientific and professional associates, and maintaining the consistency of the methodology of research.

A composite superabsorbent material was synthesized based on silk sericin, acrylic acid and acrylamide by using N, N-methylenebisacrylamide (MBA) as the crosslinker and ammonium persulfate (APS) as the initiator reagent. The water absorbency and water retaining properties of the composite under different preparation conditions were investigated. The absorbency of silk sericin / acrylic acid / acrylamide (SS/AA/AM) superabsorbent polymer polymer in deionized water, tap water and 0.9% NaCl solution were 285337 g/g, 191220 g/g, 3643g/g, respectively. SS/AA/AM material has excellent re-absorbent abilities and can be reused. The product showed different water absorbency in aqueous chloride salt solutions with the order of Na+ > Ca2+ > Mg2+ > Al3+. FTIR spectra results indicated that silk sericin was successfully grafted with acrylic acid and acrylamide molecules. The study on the absorbent material based on sericin is useful for further research on biodegradable superabsorbent polymer.

In order to improve the blood compatibility of poly(ethylene terephthalate) (PET) fabric purposed for an artificial heart valve sewing ring, the grafting of acrylic acid (AA) and polyethylene glycol (PEG) on PET fabric by Ultraviolet(UV) irradiation has been studied. The influences of UV irradiation time, UV irradiation intensity and the concentration of acrylic acid have been investigated. The results revealed that acrylic acid was successfully grafted onto the surface of PET fabric and the blood compatibility of PET fabric was effectively improved. The blood compatibility tests suggested that UV irradiation method can effectively induce PEG onto the surface of AA modified PET to further prolong the activated partial thromboplastin time (APTT), prothrombin time (PT) and thrombin time (TT).

In this paper ultrasound was applied in Savinase shrink-proof finishing process for wool fabric. A two-step procedure was adopted. Initially, hydrogen peroxide was used for pre-treatment in order to facilitate the subsequent enzymatic attack and to peel the outer scale layer effectively. The effects of enzyme concentration, temperature, time and ultrasonic power were explored through orthogonal experiments thoroughly. The results showed that ultrasound could remarkably speed up the scale-peeling process and greatly improve the shrinkage of wool fabrics. In contrast with the results obtained under conditions without the presence of ultrasound, much better shrinkages were obtained under ultrasound. Moreover, the weight loss and strength reduction were within acceptable limits. Therefore, ultrasound became a beneficial means for wool anti-felting treatment in enzymatic process. It helped to achieve better results in lesser time and lower temperature. The optimal technology was Savinase concentration (owf) 0.8%, temperature 50±C, pH = 8.5, time 40 min, ultrasonic power 175W and bath ratio 25:1. Under these conditions, the shrinkage, weight loss and tensile strength of treated sample were 1.1%, 5.40% and 417N respectively.

In order to measure the friction force between woven fabric and skin at a wet condition, it was proposed that the completed wetting woven fabric could be hung on the line for different times to reach the different wet conditions. According to the water loss characteristic of woven fabric, the relative hanging time was used to describe the different wetting rates. The friction curves between 20 kinds of woven fabric and human skin were measured by the independently developed fabric-skin friction tester at 6 kinds of wet conditions. It was found that there were 4 kinds of friction-sliding displacement curves. They were normal friction curve, arched friction curve, rising friction curve and decline friction curve. According to the characteristic of various friction curves, 7 kinds of friction indices were defined to characterize the friction properties between woven fabric and skin at wet conditions. They were static friction, turning point between static friction and dynamic friction, average dynamic friction and its coefficient of mean deviation, maximum dynamic friction force, variation rate of dynamic friction and friction coefficient. Besides, it was also found that normal friction curve and rising friction curve usually occurred and their appearing probabilities were 44% and 47%, respectively.

Based on the model of steady-state heat and moisture transfer through textiles, an Inverse Problem of Bilayer Textile Materials Determination (IPTMD) under low temperature is presented. According to the idea of regularization method, the IPTMD can be formulated into a function minimization problem. Combining the finite difference algorithm for nonlinear ordinary differential equation with direct search method of one-dimensional minimization problems, an iterative algorithm for the regularized solution of the inverse problem is constructed. By analyzing the results of numerical simulation of different climate clothing, some conclusions are obtained: Hooke-Jevees direct search method can solve the inverse problem of bilayer textile materials determination, numerical simulation also shows the effectiveness of algorithm and the rationality of the proposed inverse problem, most importantly, the results can give some scientific explanations for experiments with the textile materials.

With the development of the theory of virtual reality, three-dimensional virtual human is being applied in clothing engineering design. Parameterized model for virtual human body hence becomes more and more important. In this paper, a parameterized model for virtual human body was reported. In this model, the virtual human body was partitioned into several parts (head, right arm, left arm, trunk, right leg, and left leg). Based on the partitioned human model, the proportional characteristics of the human body were used to calculate the offset of the vertices to implement the deformation on specific part of the body. The interpolation method was used to smoothen the deformed surfaces. The experimental results show that this method had good deformation effect.

Surface modified PAN nanofibers were prepared by reaction between PAN electrospun nanofibers and hydroxylamine hydrochloride. The prepared nanofibers were used as matrix for lead ions adsorption. Micrographs of modified normal PAN fibers and PAN nanofibers were observed by Field Emission Scanning Electron Microscope (FESEM), and Fourier Transform Spectroscopy (FTIR) spectra of the surface modified PAN nanofibers were recorded. The adsorption capacity of modified PAN nanofibers and modified normal PAN fibers were calculated, and the adsorption isotherm of Pb2+ on the modified PAN nanofibers was studied. According to the results of experiment, surface modified PAN nanofibers had excellent adsorption capacity for lead ions.

In order to make bra cups meet the needs of female customers as well as to enhance the efficiency of designing bra products, this paper made a study on the definition of digital moulded bra cup moulding features and parametric modeling by means of parametric features design. This study introduced the concept of moulded bra cup's shape features and then defined the same. The instructional effects of female breast shape features and size features involved in designing of moulded bra cups were analyzed. The relationship between the shape features and size features of breasts and the shape features of moulded bra cups were also analyzed. This work made a parametric presentation on the feature points and feature curves of moulded bra cups. It realized parametric modeling according to feature points and curves. This work showed the processes of modeling of digital moulded bra cup and made it more visualized and adhered to human's designing principles, enhancing the efficiency of developed moulded bra cup products and decreasing the costs.

This paper presents the preparation of PP/CHA melt-blown nonwoven fabric and the study on its hydrophilic property. The property of polymer materials was investigated at the first place by differential thermal analysis (DSC) and rheology analysis. SEM was used to study the web structure affected by the hot air temperature. Wide-angle X-ray Diffraction (WAXD) was used to study the degree of crystallization of PP/CHA melt-blown nonwovens produced at different hot air temperatures. The hydrophilic property of PP/CHA melt-blown nonwoven fabrics was studied by testing the static water contact angle, the liquid wicking rate and the multiple liquid strikethrough time. The static contact angle test proves that hydrophilic properties were obtained by means of using the Commercial Hydrophilic Additive (CHA), while the addition of the Traditional Hydrophilic Additive (THA) did not. The liquid wicking rate test shows that PP/CHA nonwoven fabric has the highest liquid wicking rate due to its hydrophilic groups transferred to the surface and forming a hydrophilic 痩m. The multiple liquid strikethrough time indicates that the nonwoven fabric treated by THA lost its wettability after 3 insults, while nonwovens containing 5.5% CHA remained hydrophilic even after 12 insults. It can be concluded that PP/CHA melt-blown nonwoven fabrics have durable hydrophilic property.