Bacterial survival on fabrics laundered in cold water

The effect of detergent formulation and fabric type on bacterial survival after home laundering in cold water was investigated. Three fabrics, 65/35 polyester/cotton shirting, 100% cotton sheeting, and 100% cotton terry cloth, were inoculated with Staphylococcus aureus, laundered in cold 60 ± 5°F (16 ± 3°C) water and machine dried. Eight phosphorus-based powders and non-phosphorus detergents in both powder and liquid form were used. A control with no detergent was used. Percent reduction in bacteria after machine washing and after machine drying were determined. Of the eight detergents studied, only two effectively removed 100% of the bacteria from the cotton terry cloth after washing. These were sodium carbonate and aluminosilicate-based powders, one of which contained sodium perborate, the other included enzymes. All of the detergents used removed > 97% of bacteria from the polyester/cotton shirting and cotton sheeting fabrics. No significant cross contamination occurred with any fabric. A greater percent reduction of bacteria was obtained with the terry cloth samples after washing and tumble drying than after washing alone. The implications of the study are important for consumers who are using colder water in the laundering process. This study found that bacteria were removed more easily from the two plain weave fabrics than the looped terry cloth fabric. The effectiveness of tumble drying after cold water laundering to reduce bacteria in the terry cloth towelling was an important finding.     

THE EFFECT OF DETERGENT TYPE AND LAUNDERING TEMPERATURE ON THE SOIL REMOVAL AND SOIL REDEPOSITION PERFORMANCE OF COTTON AND P/C BLENDS WITH AND WITHOUT DURABLE PRESS FINISH

Three soiled test cloths of cotton and 65/35% Dacron/cotton blends with and without durable press finish were subjected to twenty-five repeated launderings in Launder-Ometer to determine the effect of fabric type, wash temperature, and laundering interval on the soil removal and soil redeposition performance. The reflectance of the test fabrics as measured by a Hunter Lab D-40 reflectometer and the amount of soil removed and redeposited was computed in reflectance unit (RU) expressing the difference in reflectance of the test samples before and after washing. Soil removal and redeposition performances were significantly influenced by fabric type, detergent type, and laundering interval. Duncan's multiple range test indicated that Dacron/cotton blends with and without durable press finish retained and redeposited significantly less soil than cotton. Powder detergents cleaned test fabrics better than liquid detergents. Highly significant correlations between soil removal and redeposition RU and whiteness measurements were found. Therefore, both computations serve as reliable methods to evaluate soil removal and redeposition performance.     

The effect of fiber type on the handle of fabric for sportshirts

Three sportshirt fabrics made from cotton, cotton/nylon blend, and nylon respectively, were evaluated in terms of fabric handle by 40 female consumers. Few differences were found between the first two fabrics but 100% nylon fabric was less acceptable. Knowledge of fiber type present had a marked effect on handle judgments.     

EFFECT OF FIBRE CONTENT AND METHOD OF APPLICATION OF SELECTED INTERFACINGS ON PERFORMANCE OF GARMENTS AFTER REPEATED LAUNDERING

The purpose of the study was to investigate the effect of fibre content and method of application of selected interfacing fabrics on appearance of garments after repeated laundering. Experimental fabrics were three interfacings of 100% polyester sew-in, 100% rayon and 100% polyester fusible, and two white fashion fabrics of polyester/cotton durable press treated and 100% cotton. Thirty blouses were constructed and divided into six groups representing six combinations of fashion and interfacing fabrics. Evaluation methods included appearance, dimensional stability and stiffness. Data were statistically analysed using t tests and Pearson rank order correlation coefficient. Results showed that method of applying interfacing fabrics had a significant effect on appearance of the combined fashion and interfacing fabrics. Sew-in method resulted in satisfactory appearance throughout repeated laundering for polyester/cotton DP fabric. Deterioration of adhesive resin of fusible interfacings in the laundering process resulted in significant shrinkage and poor appearance. Also, relationship was found between per cent shrinkage and appearance ratings indicating that as per cent shrinkage increased, appearance ratings decreased. Effect of fibre content of interfacings on appearance was not significant. However, interfacing fabrics were found to be the major contributor to shrinkage of composite fabric and not the fashion fabrics. Poor appearance of fusible interfacings was related also to per cent loss of stiffness.     

ENERGY CONSERVATION IN TEXTILE DRYING BY SELECTION OF RINSE TEMPERATURE

In washing apparel and related articles, a cold rinse does not always conserve energy. Removal of water in spin drying becomes more complete as its temperature is raised, thus reducing the amount of costly thermal drying. When gas-heated water is used in washing followed by electric drying, total energy cost is minimized by using at least a warm rinse cycle. When the same type of energy is used in water heating and drying, no energy is saved by heating rinse water.     

Perceptions of fibre types: a cross-cultural study into the effects of textile education

Abstract The study used semantic differential grids generated by consumers to compare perceptions of silk, cotton, nylon and polyester for use in (a) sportshirts and (b) ladies' slips. Student groups in the UK and Canada were surveyed both before and after an introductory course in textiles. Silk was the most preferred fibre for slips, and cotton for sportshirts. In general, the synthetic fibres and in particular nylon were viewed with disfavour. Both sets of student responses were broadly similar, although the degree of agreement was less strong than that found between English and Australian students in a comparable study. Perceptions remained relatively unchanged after a unit of textiles. The results of this work raise issues about the generally negative perceptions of synthetic fibres, which contrasts strongly with their current high level of use in clothing.     

An investigation into women's perceptions of fibre types used for holiday clothes to be worn in hot climates

When clothes are taken on a summer holiday in a hot climate, their performance properties may become particularly important. The purpose of this research was to determine women's fibre preferences for holiday clothes and to discover the perceptions underlying those preferences. Results showed a strong preference for cotton and an extreme dislike of nylon. There was a tendency to regard all man-made fibres with disfavour, with perceptions founded primarily on past unfavourable experiences of nylon only.     

A survey of commercial laundry detergents — how effective are they? Part II: liquids

The effectiveness of 11 unbuilt liquid detergents and eight built liquid detergents, of varying formulations, in cleaning a standard soiled fabric in soft water (5 ppm) were evaluated. It was found that in soft water there were no significant differences between washing in warm or hot water with either type of detergent, except for a melaleuca oil based detergent which was significantly better in hot water. However, although not significant, in general, washing with unbuilt liquid detergents did give somewhat better results in both warm and hot water.     

A survey of commercial laundry detergents - how effective are they?: Part III: powders,liquids and hard water

The effectiveness of 42 detergents, 11 non-phosphate containing powdered detergents, 12 phosphate containing powdered detergents, 11 unbuilt liquid detergents and eight built liquid detergents, of varying formulations, in cleaning a standard soiled fabric in water of varying hardness was evaluated. Powdered detergents were found to be significantly affected only at very high water hardness levels. There was no significant difference between washing in warm and hot water for the liquid detergents, except for a melaleucaoil based detergent which performed significantly better in hot water. Increasing water hardness had no significant effect on liquid detergents. Powdered detergents performed better than liquid detergents in cleaning the standard soiled fabric. While no one detergent was significantly better than the others, in general, washing with detergents that contained phosphates did give somewhat better results in warm water. Detergents that contained bleach as an additive did not result in whiter fabric.     

Comparative study of phosphate and non-phosphate detergents

A comparison of three different detergents was made by evaluating their properties of soil removal, soil redeposition and calcium carbonate deposition. The detergents included a phosphate granular detergent, a non-phosphate, carbonate built granular detergent and an unbuilt liquid detergent. The local water conditions were moderately hard and clay type soils were used. Detergency was evaluated on the basis of both visual and instrumental colour changes. In effecting soil removal, clay stained fabrics laundered with the phosphate detergent retained only a small amount of soil, while fabrics laundered with the two non-phosphate detergents showed heavier staining. In preventing soil redeposition, the phosphate detergent produced almost no visible redeposition; the unbuilt and carbonate built detergents ranked correspondingly lower. In assessing calcium carbonate deposition, the phosphate and unbuilt detergents showed little or no change, while the carbonate detergent continued to build up deposits with laundering. In summary, the phosphate detergent ranked highest in overall performance, with correspondingly lesser performance from the unbuilt and carbonate detergents.     

EFFECT OF TEXTILE QUOTA RESTRICTIONS ON U.S. COTTON TEXTILE IMPORTS BETWEEN 1964 AND 1973

The objective of this study was to investigate the effect of U.S. cotton textile quotas on cotton textiles imported into the U.S. between 1964 and 1973. The findings showed that cotton imports requiring more processing stages had significantly greater 10-year average prices than other groups. Changes in the dollar value of imported cotton textiles during the decade have mainly occurred because of an increase in the average prices rather than resulting from a redistribution of imports from low to high average price groups. The weakening correlation between changes in the dollar value and in the quantity of high unit value groups indicated that the control on quantity has not precluded increases in total dollar value of imports in higher processing stages, especially since 1970. Since fabrics with a relatively stable average price accounted for the major importation of cotton textiles during the 1964–1973 period, the overall control by quantity in this decade was still quite good, even though average prices of apparel were rising.     

Biotechnology in the textile/clothing industry – a review

Summary: This paper focuses on the use of biotechnology in the textile/clothing industry by identifying where and how such processes are already established and considers the latest developments, either in the research stage or in the early stages of commercialization. It has been found that biotechnology systems are already well known to those involved in fabric preparation, particularly as regards desizing. Enzymes used in detergent formulations have also been successfully used for the past 30–40 years. Most recent commercial advances have been in fabric finishing processes where handle modifications to cotton fabrics in particular are fast becoming established. Cutting-edge research falls in the areas of fibre modification and the generation of new fibres from natural sources, such as natural polyester from bacteria. The isolation of DNA from the shaft of hair fibres and the encoding of detectable specific antigens to designer labels is providing new ways of helping to combat fraud and counterfeit in the fashion trade. The treatment of textile effluent continues to be a major problem to the industry, but here, biotechnological developments in other industries are helping to provide some answers.     

Manual dishwashing process – a pre‐assigned behaviour?

Global studies have observed many techniques of manual dishwashing causing different levels of performance and using quite different amounts of water, energy, time and detergent. It is not known, however, if these techniques are pre‐assigned to a person and persist when dishes are washed under different conditions, or are adapted to the specific type of dish‐cleaning process. Here we explored this question in a study with 40 test subjects selected equally from Germany and East European countries by asking them to wash two place settings of dishes with different amounts of soil three times. The results showed that the test subjects did not adapt their washing‐up behaviour to the amount of soil. In general, no significant differences were found in the water, energy and detergent consumption for all test subjects. Only the time used by the German test subjects to wash the fully soiled dishes was significantly longer compared with the dishes with only a quarter the quantity of soil, and no significant difference was observed for all other parts. The only significant difference found between the level of soiling of the dishes was the cleaning result achieved: The less soiled the dishes were, the better the final cleaning result was, and this related to all test subjects. This lends support to the proposition that the consumers did not adapt their washing‐up behaviour to the specific circumstances of the dishwashing job to be done but retained some pre‐assigned behaviour.     

An assessment of the effect of fabric conditioner in the final rinse

An objective and subjective assessment of sample fabrics is made from pre-wash through to wash and use of a fabric conditioner in order to determine the physical handling measurements which can be used to assess the perceived output quality from these processes.     

An investigation into some aspects of the efficiency of low-temperature laundering

The purpose of this research was to investigate the efficiency of laundering at low and recommended water temperatures using a heavy-duty biological detergent and a low-temperature detergent. The effectiveness of the process was measured in terms of the degree of stain/soil removal from laundered garments, and in the removal and transfer of bacteria from infected test pieces. The results indicate that with both detergents a reduction in washing efficiency occurs as the temperature of laundering is decreased, except when the difference between the recommended and low water temperature is small. Evidence was also obtained that shows that reducing wash temperatures decreases the degree of disinfection and increases the cross-infection of articles washed in the same load.     

Consumer laundry practices in Germany

Sustainability is a guiding principle for a responsible, future‐oriented 21st century lifestyle and this already begins in private households with the daily household tasks. Approximately 25% of an average household's electricity consumption is required to do the laundry and dishwashing – 5% alone is for washing clothes with a corresponding energy consumption of 6 billion kilowatt hours. In addition, 600 000 tonnes of detergent and 330 million cubic metres of water are used for textile care in Germany. These figures provide the rationale for the scientific study of current practices of using washing machines and for a resulting estimate of the latent energy‐saving potential in German households. In the context of the in‐home study presented here, 236 private households throughout Germany were studied with respect to their washing practices and existing knowledge about topics on the sustainable, energy‐saving use of their washing machines. Overall, across all households 2867 wash cycles were individually recorded and subsequently analysed over a 4‐week period. The results of this study show that washing machines tend to be underloaded, and therefore maximum loading of the machines could lead to a reduction of wash cycles per household. With respect to detergent dosage, it was determined that the consumer does not adjust the dosage to the textile type, load size, soil level and/or water hardness, and this can lead to under‐ or overdosing depending on prevailing conditions. Finally, the selection of the wash temperature showed a 90°C/95°C programme was only chosen in 2.3% of all recorded wash cycles, however, every fourth cycle was completed at 60°C. Therefore, adjusting the load size and detergent dosage as well as selecting the right wash temperature are key themes to be taken into account in future consumer communication about energy‐saving households.     

The effect of sunlight on the colour of Ghanaian cotton printed fabrics

Abstract In a 3·2·2 factorial experiment in three replicates, Ghanaian cotton prints (Real Wax, Real Java, Batik) were studied. Specimens were hand washed in soap solution, rinsed in clean water and dried in shade or sunlight twice a week for 3 weeks. Unwashed specimens were similarly sun-dried or aired. All specimens were exposed to a total of 42 h in the sun or shade. Colour loss was measured by means of a grey scale. The specimens lost significantly more colour (P < 0·01) when dried in the sun (3·96) than when dried in the shade (4·09). Irrespective of the drying method, washed fabrics lost significantly more colour (P<0·01) (3·96) than unwashed ones (4·09). There was no significant interaction effect (P > 0·01) between method of drying and fabric type. However, there was a significant interaction (P<0·01) between fabric type and washing or airing. The grey scale mean for washing was 4·03 for Wax, 3·81 for Batik and 3·75 for Java. For airing, Batik, Wax and Java had means of 4·22, 4·19 and 4·17 respectively. Thus, Real Wax was the most stable when washed, whereas Batik was the most stable to airing. It is suggested that drying or airing of these fabrics be performed in the shade to preserve their colour.     

Detergent residues in textiles

The purpose of this study was to determine concentrations of detergent residues in textiles washed with three types of detergents. One detergent contained phosphate. In the other two (concentrated or ecological detergents) phosphate had been replaced by zeolite, which contains silicates. The textiles were washed using two programmes for coloured materials (at 60°C). The programmes differed with regard to volume of rinse water and number of rinsings. Detergent residues in textiles were determined chemically. Zeolite particles were determined electron microscopically. The results showed that most of the detergent residues remaining in textile strips were anionic tensides. They increased in proportion to the quantity of detergent used for washing. The least residues were left by concentrated detergents. Anionic tensides are suspected of causing skin irritation, probably allergy in atopic persons. Zeolite particles may irritate skin mechanically or cause through irritation respiratory distress. Washing programmes using less rinse water than other programmes increased detergent residues by 30%. It is concluded that there is a positive linear relationship between concentration of detergent and residues in textiles, and a negative linear relationship between water volume and residues in textiles after laundering. This could be of considerable importance from a health point of view and should be evaluated before any detergent is marketed. A methodology combining different standardized methods for analysing detergent residues in textiles was developed in this study.     

A study of the effects of repeated commercial launderings on the performance of 50/50 polyester/cotton momie cloth

Samples of brown 50% polyester/50% cotton momie cloth with a fluorocarbon finish were commercially laundered using a carbonate-built detergent in soft (0 ppm) water. The appearance of the laundered samples was assessed by subjective pilling ratings and instrumental colour determinations; the performance properties examined were tear and tensile strength, abrasion resistance and ability to release oil. The results showed that pilling was at its maximum after 20 launderings. The depth of colour decreased with increased number of cycles and, in most cases, was not accompanied by change of hue Tear and tensile strength were not affected by the laundering process. The fluorocarbon finish on the unlaundered control increased the weight loss due to Accelerator abrasion, thus that due to repeated launderings was significantly less. The finish protected the fibres from flex abrasion, increasing the number of cycles required to rupture the fabric and only the sample laundered 60 times had significantly greater resistance. The ability to release oil decreased with increased number of launderings. Oil remaining in the fabric was located in the interstices between yarns.     

Clearer Polarization in Textile Industry

Lang Xianping, a Chinese economist, once said that in China the ,economy is polarized. That is to say. some industries are excessively hot, while others are excessively cold. The situation of textile industry becomes clear： it is not simply excessively hot or cold. This misunderstanding is resulted from people＇s focus on just parts of the whole industry. For example： last year,