 |
Among the 10 high-energy-consuming industrial sectors counted in the “Eleventh Five-Year Plan†period of the country, the textile industry ranks one among them. A survey by the Flalnox company in Italy found that to produce a 200-gram cotton T-shirt, 10 kilograms of carbon dioxide need to be emitted, and the carbon dioxide emission is 50 times the weight of the T-shirt itself. Under the background of climate change, it is imperative for the carbon-expensive “big family†textile industry to take a low carbon road. At the high-level forum on climate change and low-carbon textiles that was held yesterday, many experts expressed the view that due to the development of new technologies, perhaps after 5 years, we could put on a low level made from straws and other refined silk. Carbon clothes.
Earth has been "fever"
The earth has a fever, and it has been in danger. This is illustrated by the rising temperature curve on the five continents.
Scientists believe that when the carbon dioxide concentration in the atmosphere exceeds 350ppm (one millionth), the earth will be in danger. However, the atmospheric carbon dioxide concentration measured in July 2011 was 392.39 ppm, far exceeding the warning line.
The future of the earth is not optimistic. As determined by multiple prediction models, this century is likely to heat up 4°C. If the predictions come true, then there will be about 3 billion people in water shortage and the sea level will rise by 0.59 meters.
“Climate warming is a serious challenge for humankind in the coming decades.†Academician Zhou Xiang, a professor at Donghua University and director of the Engineering Technology Committee of the National Dyeing and Finishing Engineering Technology Research Center, called for “as one of the industries with the highest greenhouse gas emissions on earth. The emission reduction of the textile industry cannot be delayed."
Reduce laundry "carbon footprint "
It is estimated that around 60 billion kilograms of fabrics are produced each year, consuming 1 trillion kilowatt hours of electricity and 9 trillion liters of water. The large amount of greenhouse gases emitted by the textile industry is evident.
If the previous huge number is converted to a 200-gram cotton T-shirt, then it needs 50 liters of industrial water, 2000 liters of agricultural water, 4 square meters of land, 5 kilowatt hours of electricity, and 4 kilograms of steam. And 0.4 kg of chemicals.
It is worth mentioning that the carbon footprint of clothes is not zeroed out due to the completion of production, and the use of carbon dioxide is also caused by the use process. According to data from the Sustain Consultation in Berlin, the carbon footprint of consumers during their use accounted for 31% of the entire life cycle of clothing, which exceeded 3% of the manufacturing process, and the more washing frequency, the more carbon emissions.
When we know the emissions and their sources, we know where to reduce carbon emissions. Washing a batch of clothes in the washing machine, 30 °C water can reduce 100 grams of carbon dioxide than 40 °C water. If you choose to dry instead of drying, you will reduce carbon emissions by 1.7 kilograms. See here, smart you should know how to do it.
Bio-waste fiber
Now, wearing a piece made of corn fiber should be a matter of pulling the wind; in the future, the source of cloth will be expanded to various crops. At present, the technology for extracting lactic acid from crops into fibers has matured. Polylactic acid filaments that have been developed from corn starch as a raw material at a chemical fiber plant in China have been woven.
Unlike fabrics made from petroleum such as polyester, the biofibers “grown†in crop fields can absorb atmospheric carbon dioxide through photosynthesis and store it in biomass and soil during the growth process. And petrochemicals not only cannot absorb carbon dioxide, but also cause large amounts of carbon emissions.
According to Jiang Shicheng, academician of the Chinese Academy of Engineering, an ordinary large-sized men's white T-shirt emits 6.5 kilograms of carbon dioxide if it is produced in the traditional way; if biomass is used, the carbon dioxide emission is only 1/10 of that amount. Of course, if the planting process uses organic methods, carbon emissions will be even less.
Jiang Shicheng’s team is trying to extract fiber from straw and other agricultural wastes and the pollen that causes water pollution. It is reported that the straw pretreatment and extraction technology is mature, and a demonstration factory has been established in foreign countries. China expects to make breakthroughs within five years and form industrialization after 10 years. (Reporter Shen Shusha)
PVC Tie Tape,High Quality PVC Tie Tape,PVC Tie Tape Details, Nanjing Youzegold Trade Co., Ltd.
Garden Tie Tape Co., Ltd. , http://www.dotape.com