Assessment of the effect of body pressure on the warmth retention in sleeping bags

Nowadays in the market, there are many kinds of warm retention materials. Although each material has its own heat loss reduction, there should be methods for evaluating the warmth properties and giving out reliable results. In this paper, the warmth retention properties of three typical non-woven wadding were studied. On the basis of four warming related tests and analyses, the conclusions were got that after filming, because of existence of motionless air, their warmth retention properties increase obviously. In the same time, the air permeability of the three non-woven wadding decrease clearly because of the film on the wadding surface which obstructs air from flowing easily.

Download Full-text

Preparation and characterization of solution spinning of protein/cellulose fiber: A new flame-retardant grade

Journal of Industrial Textiles ◽

10.1177/1528083716639064 ◽

2016 ◽

Vol 47 (2) ◽

pp. 233-251 ◽

Cited By ~ 6

Author(s):

Zhou Zhao ◽

Weiren Bao ◽

Youbo Di ◽

Jinming Dai

Keyword(s):

Flame Retardant ◽

Cellulose Fiber ◽

Decomposition Temperature ◽

Major Product ◽

Viscose Fiber ◽

Compact Structure ◽

Before And After ◽

Solution Spinning ◽

Warmth Retention

A new flame-retardant protein viscose fiber with safely wearing performance has been prepared through blending protein solution, flame retardant (hexaphenoxycyclotriphosphazene) and viscose spinning solution, in which wool protein was used and added to spinning solution on the basis of 16% flame retardant, and the properties of the fiber were investigated. The product has more compact structure inside the fiber and evenly scattered small pores on the surface. Flame-retardant protein viscose fiber can reach the flame-retardant standard both before and after 30 times wash test, and the mechanical strength of the fiber was also improved. The introduction of hexaphenoxycyclotriphosphazene lowered the primary decomposition temperature of viscose fiber, reduced its weight loss. The flame-retardancy of the fiber can be improved by the introduction of protein. In thermal processes, the major product of thermal decomposition was CO2, no hazardous and noxious gases were released. Due to the introduction of protein, moisture regain of the fiber is a little lower than that of viscose fiber, but higher than flame-retardant viscose fiber. Warmth retention property was also improved. Friction coefficient of the product is lower than that of flame-retardant viscose fiber. Bulking intensity was increased, which is better than that of viscose fiber.

Download Full-text

Thermal and Wet Comfort of Fabrics Based on Fractal Dimension of Silicone Coating

Journal of Engineered Fibers and Fabrics ◽

10.1177/155892501801300102 ◽

2018 ◽

Vol 13 (1) ◽

pp. 155892501801300

Author(s):

Yunlong Shi ◽

Liang Wang ◽

Wenhuan Zhang ◽

Xiaoming Qian

Keyword(s):

Fractal Dimension ◽

Thermal Insulation ◽

Coating Layer ◽

Fractal Theory ◽

Barrier Effect ◽

Evaporative Resistance ◽

Silicone Coating ◽

Self Similar ◽

Warmth Retention ◽

Coated Fabrics

In this paper, thermal and wet comforts of silicone coated windbreaker shell jacket fabrics were studied. Both thermal insulation and evaporative resistance of fabric increased with an increase in coating area due to the barrier effect of the silicone coating layer. Moreover, the coated fabrics with self-similar structures showed different thermal insulation and evaporative resistance under the same total coating area. Fractal theory was used to explain this phenomenon. Optimal thermal-wet comfort properties were obtained when the fractal dimension (D=1.599) was close to the Golden Mean (1.618). When the fractal dimension of coating was lower than 1.599, fabric warmth retention was not high enough. In contrast, fabric evaporative resistance was beyond the value at which people would feel comfortable when the fractal dimension was greater than 1.599.

Download Full-text

Study on the Structure and Performances of Kapok Textiles

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.573-574.167 ◽

2012 ◽

Vol 573-574 ◽

pp. 167-173

Author(s):

Li Qin Lou

Keyword(s):

Cross Section ◽

Cotton Fiber ◽

Hollow Structure ◽

Alkali Resistance ◽

Kapok Fiber ◽

Dyeing Property ◽

Weave Structure ◽

Colored Cotton ◽

White Cotton ◽

Warmth Retention

Kapok fiber has many excellent Performances. the surface and cross section of the kapok fiber were observed. These performances of the distribution of length and fineness, moisture regain, acid and alkali properties, and dyeing property were tested and compared for the kapok fiber, colored cotton fiber and white cotton fiber. The fabrics of same weave structure paramater were developed and the warmth retention property wewe tested. The results show that the surface of the kapok fiber is smooth，Cross section of the kapok fiber is round with hollow-structure. The length and fineness of the kapok fiber was lower than white cotton fiber and colored cotton fiber. The hygroscopicity and moisture guide properties of the kapok fiber was better than white cotton fiber and colored cotton fiber, the dyeing property of the kapok fiber was worse than white cotton fiber, the kapok fiber is alkali-resistance and non acid-resistant. The fabrics of the kapok fiber has better warmth retention property.

Download Full-text

Durable warmth retention finishing of down using titanium dioxide optimized by RSM

10.1063/1.4977251 ◽

2017 ◽

Author(s):

Huihao Li ◽

Lu Qi ◽

Jun Li

Keyword(s):

Titanium Dioxide ◽

Warmth Retention

Download Full-text

Study on Air Permeability and Warmth Retention Ability of Polyurethane Foam Plying with Fabrics

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.866.233 ◽

2017 ◽

Vol 866 ◽

pp. 233-239 ◽

Cited By ~ 5

Author(s):

Chi Wai Kan ◽

Clare Man Ching Ko ◽

Kittisak Ariyakuare ◽

Wasana Changmuong ◽

Rattanaphol Mongkholrattanasit

Keyword(s):

Thermal Property ◽

Polyurethane Foam ◽

Air Permeability ◽

Experimental Results ◽

Retention Ratio ◽

Warmth Retention

In this study, we evaluated warmth retention ability of polyurethane foam (non-laminated and laminated) plying with fabrics. The warmth retention ratio, measured by KES-F7, was used for expressing the thermal property of plied samples. Experimental results revealed that the warmth retention ratio of samples that were plied with fabrics were higher than the foams in plain (i.e. without plying with fabric). For non-laminated foams, the fabrics had generally increased the warmth retention ratio by 10%. For laminated foams, the increase was about 4 to 5% in the warm retention ratio. By comparing the warmth retention ratio between the non-laminated foams and laminated foams, laminated foams have higher heat retention power. Being a close-to-skin garment, the air permeability is an important factor to determine their usage. Thus, we examined the air permeability of the different samples and the results were discussed properly.

Download Full-text

Stretchable and Superelastic Fibrous Sponges Tailored by “Stiff–Soft” Bicomponent Electrospun Fibers for Warmth Retention

ACS Applied Materials & Interfaces ◽

10.1021/acsami.0c05333 ◽

2020 ◽

Vol 12 (24) ◽

pp. 27562-27571

Author(s):

Hongyan Wu ◽

Yuyao Li ◽

Lei Zhao ◽

Sai Wang ◽

Yucheng Tian ◽

...

Keyword(s):

Electrospun Fibers ◽

Warmth Retention

Download Full-text

Optically Active Polyurethane/Silica Aerogel Coated Cotton Fabrics for Thermal Protection

Frontiers in Materials ◽

10.3389/fmats.2021.681678 ◽

2021 ◽

Vol 8 ◽

Author(s):

Ling Lin ◽

Ziyin Li ◽

Haiyan Mao ◽

Wenyao Li ◽

Chaoxia Wang

Keyword(s):

Mechanical Properties ◽

Thermal Stability ◽

Thermal Protection ◽

Cotton Fabrics ◽

Retention Performance ◽

Thermal Insulating ◽

Film Forming ◽

Warmth Retention ◽

Coated Fabrics ◽

Coated Cotton

Application of SiO2 aerogel in thermal protective clothing has been limited due to its brittle nature, ordinary mechanical properties, and poor film forming performance. This work is aimed to develop thermal protective cotton fabrics by coating blended OPU/SiO2 aerogel with enhanced mechanical properties and thermal protection performance. The OPU/SiO2 aerogel composites with different ratio were applied onto cotton fabrics by knife-coating. The morphology, chemical component, crystalline structure, thermal stability and compression strength were characterized by scanning electron microscopy (SEM), Fourier transfer Infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TG) and compression test, respectively. Besides, the warmth retention performance and heat protection performance together with air and moisture permeability of the coated fabrics were studied. The results showed that OPU/SiO2 aerogel were successfully coated onto cotton fabrics with enhanced mechanical properties and thermal stability together with better film forming capacity. The heat transfer coefficient of the coated cotton fabrics was distinctly dropped due to the synergistic effect of OPU and SiO2 aerogel, which resulted in higher warmth retention. The OPU/SiO2 aerogel coated fabrics exhibited obvious heat insulation performance with its surface temperate almost 4°C than the uncoated fabrics. This work demonstrates a new strategy of fabricating stronger thermal insulating textiles using OPU/SiO2 aerogel composites.

Download Full-text