Study on the processing of stretch-broken ramie yarns in a cotton spinning system

2016 ◽  
Vol 87 (16) ◽  
pp. 2018-2027 ◽  
Author(s):  
Saipeng Guan ◽  
Hai Zhong ◽  
Jianping Yang ◽  
Chongwen Yu
Keyword(s):  
Fiber Length ◽  
High Efficiency ◽  
Ramie Fiber ◽  
Short Fibers ◽  
Yarn Quality ◽  
Comprehensive Performance ◽  
Ramie Fibers ◽  
High Length

In this study, conventional long ramie fiber was stretch-broken into short fibers with lengths of 30 mm, 35 mm, 40 mm, 45 mm, and 50 mm. Then, these stretch-broken fibers were processed in a cotton spinning system. The results show that, compared to long ramie fibers processed in a conventional ramie spinning system, the stretch-broken fibers, with reasonable fiber length and high length uniformity, can be processed in a cotton spinning system with high efficiency and generally have better resultant yarn quality. For all of the stretch-broken yarns, the yarn processed from fiber with 40 mm length shows the best comprehensive performance.

Durability study of ramie fiber fabric reinforced phenolic plates under humidity conditions

2016 ◽  
Vol 23 (1) ◽  
pp. 45-52 ◽  
Author(s):  
Guijun Xian ◽  
Peng Yin ◽  
Innocent Kafodya ◽  
Hui Li ◽  
Wei-lun Wang
Keyword(s):  
Relative Humidity ◽  
Moisture Content ◽  
Tensile Modulus ◽  
Resin Matrix ◽  
Ramie Fiber ◽  
Short Beam ◽  
Low Degree ◽  
Beam Shear ◽  
Ramie Fibers ◽  
Fiber Fabric

AbstractA durability study of a ramie fiber fabric reinforced phenolic resin (RFRP) plate under 50%, 85%, and 98% relative humidity for 6 months at room temperature was performed. Water absorption and desorption, tensile and short beam shear strengths of the RFRP plates were investigated as a function of exposure time. RFRP samples show strong hydrophilic characteristics and the saturated water content varies from 0.73% to 4.5% with relative humidity ranging from 50% to 98%. After 6 months of exposure to 98% relative humidity, an abnormal extra amount of moisture was absorbed, which may have resulted from cracks in the resin matrix or from debonding between fiber and resin due to swelling of the fibers with high moisture content. It was found that the tensile modulus is more susceptible to moisture uptake, which is ascribed to the degradation of ramie fibers with the water ingress. An approximate linearity between the mechanical properties and the moisture content is observed if the abnormal extra water uptake is neglected. Both tensile and short beam shear strengths of the RFRP samples recovered remarkably when samples were fully dried at 60°C, indicating a low degree of permanent degradation occurred due to the exposure.

A high-efficiency and eco-friendly degumming process for ramie fibers

2020 ◽  
Vol 276 ◽  
pp. 124217 ◽  
Author(s):  
Tong Shu ◽  
Yun Bai ◽  
Ya-wei Wang ◽  
Hui-hui Wang ◽  
Pan-deng Li ◽  
...  
Keyword(s):  
High Efficiency ◽  
Ramie Fibers ◽  
Degumming Process

High-efficiency organosolv degumming of ramie fiber by autocatalysis of high-boiling alcohols: an evaluation study of solvents

Cellulose ◽  
2020 ◽  
Vol 27 (8) ◽  
pp. 4271-4285 ◽  
Author(s):  
Yongshuai Qu ◽  
Shuyuan Zhao ◽  
Zhaohe Shi ◽  
Ruiyun Zhang ◽  
Liu Liu ◽  
...  
Keyword(s):  
High Efficiency ◽  
Evaluation Study ◽  
Ramie Fiber

scholarly journals Flame-retardant wrapped ramie fibers towards suppressing “candlewick effect” of polypropylene/ramie fiber composites

2014 ◽  
Vol 33 (1) ◽  
pp. 84-94 ◽  
Author(s):  
Shuang-lan Du ◽  
Xue-bao Lin ◽  
Rong-kun Jian ◽  
Cong Deng ◽  
Yu-zhong Wang
Keyword(s):  
Flame Retardant ◽  
Fiber Composites ◽  
Ramie Fiber ◽  
Ramie Fibers

Study on Ramie Fiber Reinforced Polypropylene Composites (RF-PP) and its Mechanical Properties

2008 ◽  
Vol 41-42 ◽  
pp. 313-316 ◽  
Author(s):  
Li Ping He ◽  
Yong Tian ◽  
Lu Lin Wang
Keyword(s):  
Mechanical Properties ◽  
Fiber Length ◽  
Fiber Content ◽  
Ramie Fiber ◽  
Fiber Reinforced ◽  
Polypropylene Composites ◽  
Environmental Friendly ◽  
Pp Composites ◽  
Pre Treatment ◽  
The Impact

Natural fiber reinforced polypropylene composites (NF/PP) have attracted a lot of attention because of their light weight, good mechanical properties, recyclable and environmental friendly features. This work has successfully fabricated ramie fiber reinforced polypropylene composites (RF/PP) with a hybrid method of melt-blending and injection molding. Different RF/PP eco-materials have been fabricated by varying the fiber length, fiber content and way of fiber pre-treatment. This paper studied the mechanical properties of the fabricated RF/PP composites in depth by investigating the mechanical behaviors of RF/PP and microstructures of the ruptured surfaces. The results show that the increases of fiber length and fiber content can improve the tensile strength, flexural strength and compression strength apparently, but result in negative influences on the impact strength and elongation behaviors of RF/PP composites. The optimal addition amount of ramie fiber is around 20 wt%. The pre-treatment of ramie fiber in 10%~15% NaOH is good to the mechanical properties of RF/PP. The fiber length can be varied in the range of 3-8 mm. It is expected that the fabricated RF/PP composites can be applied to automobile industry as environmental friendly eco-materials.

Effect of Lattice Distortion Modification Processing on Crystallinity and Orientation of Ramie Fiber

2012 ◽  
Vol 152-154 ◽  
pp. 634-637 ◽  
Author(s):  
Yi Ze Sun ◽  
Zi Na Zhu ◽  
Zhuo Meng ◽  
Xiao Ping Gao
Keyword(s):  
Grain Size ◽  
Lattice Distortion ◽  
Lattice Structure ◽  
Diffraction Method ◽  
Experimental Results ◽  
Ramie Fiber ◽  
X Ray Diffraction ◽  
X Ray ◽  
Processing Equipment ◽  
Ramie Fibers

In order to test whether the crystallinity and orientation of ramie fibers have changed after they are treated by the lattice distortion modification processing technology, this paper does some experiments on it. Firstly, process ramie fibers by the lattice distortion modification processing equipment. Then use X-ray diffraction method to determine the crystallinity and orientation of pristine and modified ramie fibers. Finally analyse the effect of lattice distortion modification processing on the lattice structure of ramie fiber. The experimental results show that the lattice structure of ramie fiber has changed after modification processing, with crystallinity, grain size decreasing obviously and orientation slight descent, which make ramie fibers appear softer and more puffy from macrocosmic perspective.

scholarly journals Green degumming process of ramie fiber thermal effect and optimization

2019 ◽  
Vol 23 (4) ◽  
pp. 2447-2451 ◽  
Author(s):  
Guoliang Liu ◽  
Dan Tian ◽  
Bangze Zhou ◽  
Yumeng Zhang ◽  
Tao Xu ◽  
...  
Keyword(s):  
Natural Fibers ◽  
Weight Ratio ◽  
Raw Material ◽  
Effect Of Temperature ◽  
Ramie Fiber ◽  
Traditional Treatment ◽  
Sodium Percarbonate ◽  
Ramie Fibers ◽  
Degumming Process ◽  
Environmentally Friendly Process

Ramie is a kind of natural fibers, it requires degumming process before it can be used as a raw material for various applications. The traditional treatment uses alkali, which is not an environmentally friendly process. In this paper, ramie fibers are degummed using sodium percarbonate, which causes no any negative environmental problems, and its decomposition, hydrogen peroxide, is a clear liquid, it can be used as an oxidizer, bleaching agent and antiseptics for surface treatment of ramie fibers. Effect of temperature and concentration of sodium percarbonate on the degumming process are studied theoretically and verified experimentally. Finally an optimal degumming process is suggested for maximal weight ratio of degummed ramie fiber to raw bast.

scholarly journals Study of the influence of cotton fiber indicators on yarn quality

2021 ◽  
Vol 304 ◽  
pp. 03036
Author(s):  
Umida Yusupalieva ◽  
Saypila Matismailov ◽  
Alisher Yuldashev
Keyword(s):  
Tensile Strength ◽  
Coefficient Of Variation ◽  
Cotton Fiber ◽  
Fiber Length ◽  
Optimal Parameter ◽  
Regression Equation ◽  
Mathematical Planning ◽  
Fiber Properties ◽  
Yarn Quality ◽  
The Relationship

In order to determine the relationship between the fiber properties of the yarn quality in the article, experiments were conducted using a passive method of mathematical planning and a regression equation was obtained for each optimal parameter. Based on the experiments, it was found that a decrease in fiber micronaire, an increase in tensile strength, fiber length and uniformity, leads to an increase in the specific tensile strength of yarn, a decrease in the coefficient of variation in tensile strength and the number of breaks in the yarn.

Statistical Study of the Influence of Fiber Content, Fiber Length and Critical Length in the Mechanical Behavior of Polymeric Composites Reinforced with Carica Papaya Fibers (CPFs)

2021 ◽  
Author(s):  
Caroliny Santos ◽  
Thiago Santos ◽  
Katia Moreira ◽  
Marcos Aquino ◽  
Rubens Fonseca Lucas Zillio
Keyword(s):  
Fiber Length ◽  
Carica Papaya ◽  
Statistical Study ◽  
Ricinus Communis ◽  
Critical Length ◽  
Fiber Content ◽  
Short Fibers ◽  
Vegetable Fibers ◽  
Natural Resin ◽  
Polyurethane Resin

Vegetable fibers are excellent substitutes for manmade fibers because are biodegradables, resistant and sustentables. This article studied the potencial application of Carica Papaya Fibers (CPF) in polymerics composites of natural resin. A simple model of micromechanical analysis was used for prediction of breaking stress, strain and Young’s modulus in composites with short fibers of Carica Papaya with matrix of polyurethane resin obtained from Ricinus Communis vegetable. The fiber content used between 10–35% and fiber length between 3–6%. The analyzes were performed using analysis of variance (ANOVA) to assess the influence of variables on the mechanical properties of each composite produced. The results obtained show that increased in fiber length promoted increase in stress values, while the increase in fiber content favored the increased in the stiffness of the composite.

Computer Simulation of 3-D Random Distribution of Short Fibers in Metal Matrix Composite Materials

1999 ◽  
Vol 121 (3) ◽  
pp. 386-392
Author(s):  
Jiang Xiaoyu ◽  
Kong Xiangan
Keyword(s):  
Composite Materials ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Fiber Length ◽  
Short Fiber ◽  
Fiber Reinforced ◽  
Short Fibers ◽  
Reinforced Composite ◽  
Standard Deviations

In this paper, the microstructure of “Saffil”-Al2O3 short fiber reinforced Al-Mg5.5 metal matrix composite material is simulated by computer. In the simulation it is taken into account of that the lengths, diameters, orientations, and locations of short fibers, etc. For the 3-D randomly distributed short fibers in composite materials, the typical distributions of short fiber microstructures on different planes are obtained for different short fiber volume fractions. The microstructural effects of average fiber length, diameter and their standard deviations on the overall strength of metal matrix composite materials are analyzed. From the short fiber microstructural distribution in metal matrix composite materials, the short fiber diameter coefficient ξd and short fiber length coefficient ξ1 are obtained for different standard deviations σd and σl, respectively. The short fiber orientation coefficient ξa is obtained, also. The results of these coefficients may be useful to the manufacture and use of short fiber reinforced composite materials. Considering these coefficients ξa ξd and ξl, the improved formula is given for the direct calculation of overall strength of short fibers reinforced composite materials. The improved formula may reflect the microstructural characteristics of short fibers reinforced composite materials.

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