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2021 ◽  
Vol 58 (3) ◽  
pp. 148-159
Author(s):  
Vlad Alexandru Georgeanu ◽  
Dumitru Bolcu ◽  
Marius Marinel Stanescu ◽  
Ion Ciuca ◽  
Victorita Stefanescu ◽  
...  

Great interest has been shown lately in bio-composite materials because they are inexpensive and sustainable. Composites with matrices and natural reinforcers have been little studied. Here, we study certain mechanical properties of composite materials with a Dammar-based matrix (also named hybrid matrix) and flax fabric reinforcement. To be precise, we examine three types of resins where Dammar is the major component, with a volume proportion of 55%, 65% and 75%. In this respect, we have made composite materials reinforced by two types of flax fabric and we have measured the characteristic curves and some mechanical properties, such as the Young�s modulus, tensile strength and elongation at break using tensile tests. Based on the obtained properties, it is proposed or possible to use these materials in orthopedics.


2021 ◽  
Vol 154 ◽  
pp. 106179 ◽  
Author(s):  
Yingchao Liang ◽  
Xiuming Liu ◽  
Kuanjun Fang ◽  
Fangfang An ◽  
Chang Li ◽  
...  

2021 ◽  
Vol 113 ◽  
pp. 53-59
Author(s):  
Izabela Burawska-Kupniewska ◽  
Maciej borowski

Selected mechanical properties of the reinforced layered composites. Publication concerns the production of fiber reinforced layered composites and its selected mechanical properties. The following reinforcement types of the layered composites were taken into consideration: linen fabric and fiberglass. Two types of core materials were tested: plywood and PUR foam. The assembled composites were tested for MOR, MOE and screw holding ability. Additionally density and density profile were determined. Fiberglass reinforced composites were used as a reference material for composites reinforced with natural fibres.


Coatings ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 354
Author(s):  
Tim Tofan ◽  
Rimantas Stonkus ◽  
Raimondas Jasevičius

The aim of this research is to investigate related effect of dyeability to linen textiles related to different printing parameters. The study investigated the change in color characteristics when printing on linen fabrics with an inkjet MIMAKI Tx400-1800D printer with pigmented TP 250 inks. The dependence of color reproduction on linen fabrics on the number of print head passes, number of ink layers to be coated, linen fabric density, and different types of linen fabric was investigated. All this affects the quality of print and its mechanical properties. The change in color characteristics on different types of linen fabrics was determined experimentally. We determine at which print settings the most accurate color reproduction can be achieved on different linen fabrics. The difference between the highest and the lowest possible number of head passages was investigated. The possibilities of reproducing different linen fabric colors were determined.


Catalysts ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1265
Author(s):  
Kengo Hamada ◽  
Tsuyoshi Ochiai ◽  
Yasuyuki Tsuchida ◽  
Kyohei Miyano ◽  
Yosuke Ishikawa ◽  
...  

Chemicals for the scouring and bleaching of fabrics have a high environmental load. In addition, in recent years, the high consumption of these products has become a problem in the manufacture of natural fabric products. Therefore, environmentally friendly, low-waste processes for fabric treatment are required. In this paper, we discuss the bleaching of fabrics using advanced oxidation processes (AOP). These processes use electrochemically generated aqueous ozone and ultraviolet (UV) irradiation to achieve bleaching. However, colour reversion often occurs. In this study, we suppressed unwanted colour reversion by treatment with rongalite. After treatment, changes in fabric colour were determined by measuring the colour difference and reflectance spectra. The best bleaching effect was obtained when ozone and UV irradiation treatments were combined, achieving results similar to those of a conventional bleaching method after 60 min of UV irradiation. In addition, the AOP treatment resulted in the simultaneous scouring of the fabric, as shown by the increased hydrophilicity of the fabric after AOP treatment. Thus, this AOP process represents a new fabric bleaching process that has an extremely low environmental impact.


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