Moisture Absorption Finishing of Polyester Fabric

2013 ◽  
Vol 275-277 ◽  
pp. 2182-2185
Author(s):  
Jun Zhang
Keyword(s):  
Moisture Absorption ◽  
Process Condition ◽  
Polyester Fabric ◽  
Curing Temperature ◽  
Optimum Process ◽  
Curing Time ◽  
Drying Time ◽  
Moisture Management ◽  
Finishing Agent

Polyester fabric was finished by water-absorbent and quick-dry agent Casofter-252 and moisture management agent Hipom-790 for improving its moisture management property. The quality of moisture absorption finishing of the polyester fabric was detected in terms of wicking height and fast drying time. And the influence of agent concentration, pH, and curing temperature and time on moisture management property was studied in order to obtain the optimum process condition. The best choice for Casofter-252 was agent concentration 20g/L, pH 3, curing temperature 135 oC, curing time 120s, and the optimum finishing condition for Hipom-790 was as follows: agent concentration 30g/L, pH 5, curing at 115 oC for 140 s. The finished polyester fabric under the optimum condition showed much better air permeability. The tensile strength of the fabric increased after moisture finishing with Hipom-790 while it decreased for Casofter-252 used as a finishing agent.

Study on the Durability of Fluorinated Water and Oil Repellent Finishing by Contact Angle Method

2012 ◽  
Vol 482-484 ◽  
pp. 1294-1297
Author(s):  
Dian Wei Zhang ◽  
Yong Zhu Cui ◽  
Yan Ling Sui
Keyword(s):  
Contact Angle ◽  
Curing Temperature ◽  
Cross Linking ◽  
Optimum Process ◽  
Curing Time ◽  
Repellent Property ◽  
Finishing Agent ◽  
Oil Repellent ◽  
Angle Method

In this paper, fluorinated water and oil repellent finishing agent was mixed with auxiliary agents and the durability of fabrics treated with the finishing agent was investigated. The water and oil repellent property was discussed and evaluated by contact angle method. The results showed that under the same conditions, adding 0.4% cross-linking agent could make the contact angle of the treated fabric higher than untreated, and the durable-washing property of the fabric was excellent and the durability of fluorinated water and oil repellent finishing agent got improved greatly. The optimum process was that the dosage of water and oil repellent finishing agent was 50g/L, the dosage of cross-linking agent was 4g/L, curing temperature was 160 °C and curing time was 90s.

scholarly journals Drying Speed Testing of PES Fabric with Defined Moisture Management

2020 ◽  
Vol 28 (1(139)) ◽  
pp. 43-49
Author(s):  
Tereza Heinisch ◽  
Pavla Tesinova ◽  
Lucie Pološčuková
Keyword(s):  
Moisture Transport ◽  
Polyester Fabric ◽  
Drying Time ◽  
Moisture Management ◽  
Fabric Comfort ◽  
The Relationship ◽  
Interpretation Of Results

This paper deals with the evaluation of the moisture management of woven polyester fabric in three basic weaves – plain, twill and satin. It details types of liquid management and evaluates fabric comfort in terms of liquid moisture transport, drying speed and the moisture management of resistivity. It discusses the relationship between moisture management and the drying time of textile structures. New equipment is defined for drying speed determination, and its schematic and principles are discussed in this paper. Because the methods have some limitations and matters of presumption, the necessary interpretation of results is also discussed.

scholarly journals A Laboratory Scale Synthesis of Geopolymer from Locally Available Coal Fly Ash from Brick Industry

2013 ◽  
Vol 29 ◽  
pp. 18-23
Author(s):  
Rishi Babu Bhandari ◽  
Arvind Pathak ◽  
Vinay Kumar Jha
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Time Variation ◽  
Coal Fly Ash ◽  
Curing Temperature ◽  
Alkali Concentration ◽  
Curing Time ◽  
Mass Ratio ◽  
Maximum Compressive Strength

In this work, geopolymers have been synthesized from coal fly ash (CFA) using KOH and Na2SiO3 as activators. Some parameters such as alkali concentration, amount of Na2SiO3 and curing time have been varied in order to improve the quality of geopolymeric product. The geopolymerization process was carried out using 3-8 M KOH solutions, Na2SiO3 to CFA mass ratio of 0.25-2.00 and curing time variation from 6-28 days. The curing temperature was fixed at 40°C in all the cases. During the variation of KOH concentration, the maximum compressive strength of 6.62 MPa was obtained with CFA treated with 7 M KOH solution. Similarly, with the variation of the mass ratio of Na2SiO3 to CFA, the maximum compressive strength of 28.1 MPa was obtained with Na2SiO3 to CFA mass ratio of 1.75. Furthermore, the compressive strength was found to be increased with increasing curing time and 41.9 MPa was achieved with 28 days of curing time. DOI: http://dx.doi.org/10.3126/jncs.v29i0.9232Journal of Nepal Chemical SocietyVol. 29, 2012Page: 18-23Uploaded date : 12/3/2013 

scholarly journals Synthesis of Geopolymer from Coal Fly Ash

2013 ◽  
Vol 30 ◽  
pp. 24-28
Author(s):  
Vinay Kumar Jha ◽  
Gautam Prasad Budhamagar
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Coal Fly Ash ◽  
Chemical Society ◽  
Curing Temperature ◽  
Alkali Concentration ◽  
Curing Time ◽  
Naoh Solution ◽  
Maximum Compressive Strength

In the present work, geopolymers have been synthesized from coal fly ash (CFA) using NaOH and Na2SiO3 as activators. Some parameters like alkali concentration, amount of Na2SiO3 and curing time have been varied in order to improve the quality of geopolymeric product. The geopolymerization process has been performed using 3-8M NaOH solutions, Na2SiO3 to CFA mass ratios of 0.25-1.25 and curing time variation from 5-15 days. The curing temperature was fixed at 40ºC in all cases. In the variation of NaOH concentration, the maximum compressive strength of 2.3 MPa was obtained with CFA treated with 6M NaOH solution. Similarly during the variation of amount of Na2SiO3, the maximum compressive strength of 17.6 MPa was obtained with Na2SiO3 to CFA mass ratio of 1.25. Furthermore, the compressive strength was found increasing up to 20.3 MPa with increasing curing time.DOI: http://dx.doi.org/10.3126/jncs.v30i0.9331Journal of Nepal Chemical Society Vol. 30, 2012 Page:  24-28 Uploaded date: 12/16/2013 

The Durability of Water and Oil Repellent Finishing of Cotton Fabrics with Isocyanate

2013 ◽  
Vol 634-638 ◽  
pp. 2579-2582
Author(s):  
Dian Wei Zhang ◽  
Yong Zhu Cui ◽  
Wang Xiao ◽  
Guo Jun Liu
Keyword(s):  
Contact Angle ◽  
Cotton Fabrics ◽  
Curing Temperature ◽  
Cross Linking ◽  
Curing Time ◽  
Finishing Agent ◽  
Oil Repellent ◽  
Organic Fluorine

The cotton fabrics was treated with the blending of organic fluorine water and oil repellent finishing agent and cross-linking agent. The contact angle to water was over 120°and that to oil was above 110°after the fabrics were washed 20 times, indicating that the water and oil repellent properties and durability of fabrics were excellent. And the technology was optimized as follows: the water and oil repellent finishing agent 50g/L, cross-linking agent 4g/L, curing temperature 150°C and curing time 200s.

Study on Preparation of Titanium Dioxide from Low Iron and Rich Titanium Slag with Acid Hydrolysis Technical

2012 ◽  
Vol 554-556 ◽  
pp. 682-686
Author(s):  
Zhi Yong Hu
Keyword(s):  
Titanium Dioxide ◽  
Sulfuric Acid ◽  
Acid Hydrolysis ◽  
Process Parameters ◽  
Sulfuric Acid Concentration ◽  
Curing Temperature ◽  
Hydrolysis Rate ◽  
Optimum Process ◽  
Curing Time ◽  
Titanium Slag

Titanium dioxide is an important inorganic chemical product, and low iron and rich titanium slag can be made into titanium dioxide. In this paper, process parameters for preparing titanium dioxide were investigated. The results show that with the increase of sulfuric acid concentration, curing time and curing temperature, the rate of sulfuric acid hydrolysis rate will be improved, as well as charging temperature. According to the orthogonal test, the optimum process parameters condition of sulfuric acid is 95% sulfuric acid, 180°C reaction temperature, and 120min curing time.

Reach on P/N Type Intumescent Flame Retardant for Polyester Fabric

2013 ◽  
Vol 785-786 ◽  
pp. 714-717 ◽  
Author(s):  
Yi Zhou ◽  
Yong Zhu Cui ◽  
Guo Jun Liu ◽  
Li Hua Lv
Keyword(s):  
Flame Retardant ◽  
Flame Retardants ◽  
Thermo Gravimetric Analysis ◽  
Polyester Fabric ◽  
Decomposition Temperature ◽  
Intumescent Flame Retardant ◽  
Curing Temperature ◽  
Optimum Process ◽  
Gravimetric Analysis ◽  
Scanning Calorimetry

An intumescent flame retardant (IFR) containing phosphorus and APP was applied to polyester fabric. The finishing process was optimized and the properties of treated fabric were characterized. The optimum process was as follows: the total dosage of IFR system was 40%, the mass ratio of phosphorus-containing flame retardants and APP was 7:3, and curing temperature was 180°C. The treated PET fabrics imparted good resistance to melt drop. Characterization of the thermo-gravimetric analysis, differential scanning calorimetry (DSC) indicated that much more residual char with intumescent structure, the incombustible gas and water were formed during combustion of flame retardant polyester fabric, whose decomposition temperature was lower compared to that of the untreated sample.

Solar Cabinet Drying of Bitter Gourd: Optimization of Pretreatments and Quality Evaluation

2010 ◽  
Vol 6 (4) ◽  
Author(s):  
Deepak Baburao Jadhav ◽  
Ganesh Lotanrao Visavale ◽  
Parag P Sutar ◽  
Uday S Annapure ◽  
Bhaskar Narayan Thorat
Keyword(s):  
Quality Evaluation ◽  
Process Condition ◽  
Moisture Diffusivity ◽  
Bitter Gourd ◽  
Optimum Process ◽  
Air Velocity ◽  
Freeze Dried ◽  
Central Composite ◽  
Chlorophyll Retention

Response surface methodology was used to optimize the pretreatments before solar cabinet drying of bitter gourd slices (6-7 mm thick). Central composite design (CCD) was used to conduct the experiments which consisted thirteen experiments with two variables, viz., blanching time (1-5 min) and potassium metabisulfite (KMS) (0.2-0.5 %). After the pretreatments, the bitter gourd slices were dried up to 6 % (Approx.) moisture content (d.b) in solar cabinet dryer at air temperature, relative humidity and air velocity in the range 38 to 62°C, 45 to 55 % and 0.9 to 1 m/s, respectively. The responses taken were chlorophyll retention (mg/100g of dried sample) and texture (hardness) of dehydrated bitter gourd slices. The optimum process condition was found at 4.24 min blanching time and 0.49 % KMS which resulted in 20.15 mg/100g chlorophyll retention and 340.55 g hardness. Some selected quality attributes of solar cabinet dried bitter gourd slices pretreated with the optimized combination of blanching time and KMS were compared with the quality of freeze and open sun dried samples and it was found that quality of solar cabinet dried product was falling in between open sun and freeze dried products. Also, the drying data of bitter gourd slices obtained during solar cabinet, freeze and open sun drying were analyzed and drying constants as well as moisture diffusivity were calculated.

scholarly journals The Quality of Red Bell Pepper Subjected to Freeze-Drying Preceded by Traditional and Novel Pretreatment

Foods ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 226
Author(s):  
Katarzyna Rybak ◽  
Artur Wiktor ◽  
Dorota Witrowa-Rajchert ◽  
Oleksii Parniakov ◽  
Małgorzata Nowacka
Keyword(s):  
Freeze Drying ◽  
Bell Pepper ◽  
Total Phenolic ◽  
Thermal Methods ◽  
Drying Time ◽  
Freeze Dried ◽  
Dehydration Processes ◽  
Vacuum Freezing ◽  
Better Than

It has been demonstrated previously in the literature that utilization of PEF or a combination of a pulsed electric field (PEF) and ultrasounds (US) can facilitate dehydration processes and improve the quality of dried products even better than the application of thermal methods such as blanching. The aim of the study was to evaluate the quality of red bell pepper subjected to freeze-drying preceded by blanching or PEF or US treatment applied in a single and combined mode. Furthermore, the freeze-drying was preceded by shock freezing or vacuum freezing performed inside the freeze-dryer as a result of pressure drop during the first stage of freeze-drying. All of the analyzed technological variants enhanced the drying kinetics when compared to the intact material. Freeze-dried bell pepper subjected to non-thermal pretreatment exhibited higher vitamin C, total phenolic and carotenoids content than blanched material despite the fact that blanching reduced drying time the most compared to all other analyzed methods.

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