Delong Chemical 丨 Waterproof Stabilizer DL-C8611
Product features: can effectively reduce the phenomenon of waterproof agent stick roller in summer, with the ability to comprehensively combat unfriendly working environment.
The past and present lives of waterproofing agents
First, the history of textile waterproofing agents:
At the beginning of the 19th century, there was a waterproof finishing of aluminum soap and paraffin emulsion, which had good water repellency, but the disadvantage was that it was not resistant to washing.
In the 1930s, long carbon chain waterproofing agents appeared. This type of waterproofing agent can form cellulose ether with cellulose macromolecules, which has good and long-lasting waterproofness.
In 1940, the United States Patnode published a patent pointing out that after the fabric fiber was treated with dimethyl dichlorosilane, the fabric had a good waterproof effect. However, in the process of waterproof finishing of fluorine-free waterproofing agents, HCl gas will be released, endangering people's health.
In the 1940s, DuPont proposed a compounded complexation type of waterproofing agent, but this waterproofing agent itself had a green color, thus limiting its use.
At the end of the 1940s, silicone waterproofing agents appeared, which are particularly suitable for a variety of synthetic fibers and wool fabrics, and can also be used for cellulose fiber fabrics.
In 1945, Elliott and others of the General Electric Company of the United States soaked the fabric fibers in an alkaline aqueous solution and heated them with sodium methyl silanol, and the finished fabric had a good waterproof effect.
In 1947, 3M invented PFOA (Perfluorooctanoic Acid, Molecular Formula C8HO2F15).
In the early 1950s, dow Corning Company of the United States used hydrogen-containing polysiloxanes in combination with polydimethylsiloxane (PDMS), and the treated fabric not only had a very good waterproof effect, but also became soft in the hand.
In 1951, DuPont began purchasing PFOA from 3M to produce "Teflon". C8 waterproofing agent is not only waterproof, but also oilproof, does not affect the textile style, and began to become the mainstream of waterproofing agents.
Later, the research and application of fluorine-containing waterproofing agents have been further developed in the United States and Japan.
Second, the prohibition of C8 waterproofing agent:
The production of C8 waterproofing agent produces two by-products, PFOS and PFOS, and the harmfulness of these two chemicals is gradually confirmed.
Whether it is electrolysis or polypolymerization, it is impossible to achieve that the content of PFOA and PFOS after the C8 waterproof agent is added to the fabric is less than 1.0μg/m2, which determines that the C8 waterproof agent will inevitably be eliminated.
On 17 December 2006, the European Parliament and the Council of Ministers jointly issued the Directive on restrictions on the sale and use of PFOS (2006/122/EC).
In 2006, the U.S. Environmental Protection Agency (EPA) ordered DuPont and eight other chemical companies to stop manufacturing the core ingredient perfluorooctanoate (PFOA) required for the manufacture of Teflon, and together with DuPont received the EPA order, including DuPont Dow Elastomer Company, Japan's Asahi Glass Co., Ltd., Swiss Autobart Chemicals Company and Germany's Clariant Company and many other well-known industry giants.
In 2015, Oeko-tex 100 uniformly reduced the limit conditions of perfluorooctanoic acid (PFOA) to <1.0 μg/m2, and the limit on perfluorooctane sulfonyl compounds (PFOS) was reduced from ≤ 1.0 μg/m2 to <1.0 μg/m2.
Third, C6 waterproof agent:
The main ingredient of C6 waterproofing agent is PFHS (meth)acrylate perfluorohexyl ethyl ester copolymer, which does not contain PFOA and PFOS, and is the most ideal product to replace C8 waterproofing agent. However, the shorter the carbon chain, its waterproof and oilproof effect will be reduced, and in order to achieve the effect of C8 waterproofing agent, it is necessary to increase the amount of use and increase the cost. There are also many clothing brands that do not accept C6 waterproofing agent, and can only use fluorine-free waterproofing agent.
Fourth, fluorine-free waterproofing agent:
Fluorine-free waterproofing agent can be completely free of PFOA and PFOS, and does not contain PFCS (perfluoroalkyl compound), which is recognized by more and more brands, but compared with fluorinated waterproofing agents, there are two disadvantages: one is that it cannot prevent oil; the other is that the coating fastness is poor, and the fiber is easy to slip.
The more well-known fluorine-free waterproofing agents on the market are: Rudolph ECO PLUS, Delong Chemical Waterproof Stabilizer DL-C8611 and so on.
The operation of China's industrial textile industry in the first three quarters of 2021
In the first three quarters of 2021, China's industrial textile industry has returned to normal operation from the rapid growth in 2020. Affected by the high base in the same period of 2020, the industrial added value of enterprises above designated size in China's industrial textile industry continued to decline from January to September 2021, with a decline of 21.0%, but the average growth rate in two years still reached 12.3%.
In terms of production, the output of nonwovens of enterprises above designated size from January to September reached 4.4764 million tons, down 1.01% year-on-year; the output of cord fabrics was 611,700 tons, an increase of 29.71% year-on-year.
Growth rate of nonwovens output of enterprises above designated size (%)
Source: National Statistical Office
In terms of economic benefits, the operating income of enterprises above designated size in the industrial textile industry fell by 14.74% year-on-year from January to September, an average growth rate of 10.78% in two years, a year-on-year decline of 63.78% in total profits, an average increase of 14.12% in two years, and an operating profit margin of 5.25%, down 7.11 percentage points year-on-year. In terms of sub-sectors, the total operating income and profit of the nonwovens industry fell by 23.94% and 74.69% respectively, and the operating profit margin was 5.13%, down 10.29 percentage points from the same period last year; the total operating income and profit of the rope, cable and cable industries increased by 11.43% and 7.87% year-on-year, respectively, and the operating profit margin was 4.15%, down 0.14 percentage points year-on-year; the textile belt and cord cloth market development momentum was better, and the total operating income and profit increased by 21.19% year-on-year, respectively. And 99.46%, the operating profit margin reached 5.49%, an increase of 2.15 percentage points year-on-year; the total operating income and profit of the canopy and canvas increased by 26.06% and 22.49% respectively, 5.88% of the operating profit margin was the highest in the industry; the operating income and profit of other industrial textiles where medical and health, filtration, geotechnical textiles were located decreased by 24.56% and 66.46% respectively, and the operating profit margin was 5.39%, down 6.73 percentage points year-on-year.
Main economic indicators of the industrial textile industry from January to September 2021 (above designated size)
In terms of listed companies, the operating income of 31 listed companies in the third quarter fell by 1.15% year-on-year, and the total profit fell by 33.59% year-on-year, of which listed companies in the field of automotive textiles and filter textiles had a better development momentum.
In terms of international trade, from the perspective of the industry's main export products, from January to September, the export of nonwovens, special yarns, threads, ropes, cables, cables and their products (Customs Commodity Comprehensive Classification Chapter 56 Products) was worth 6.230 billion US dollars, an increase of 6.91% year-on-year, of which the export of nonwovens was 3.434 billion US dollars, down 4.52% year-on-year, and the export volume was 1.0475 million tons, an increase of 8.06% year-on-year. Exports of industrial textiles (Products of Chapter 59 of the Comprehensive Customs Commodity Classification) amounted to US$6.655 billion, an increase of 39.74% year-on-year. In terms of exports of epidemic prevention materials, the export of chemical fiber nonwoven protective clothing (including medical protective clothing) was 1.911 billion US dollars, down 79.81% year-on-year; the export of unlisted textile products (including masks) was 9.908 billion US dollars, down 79.42% year-on-year. Since the outbreak of the new crown pneumonia epidemic, China has provided about 350 billion masks and more than 4 billion protective clothing to the international community.
At present, the global epidemic situation is still in a tense situation, the domestic epidemic situation also shows a multi-point sporadic trend, coupled with the "power rationing and production limitation" in some parts of the country, the continuous rise in the price of major raw materials in the industry, the high international maritime prices and other unfavorable factors, the industrial textile industry enterprises will still face greater operating pressure. Entering the fourth quarter, due to the continuous impact of the base effect, it is expected that the main economic indicators in the field of epidemic prevention materials in the industrial textile industry will still be in the declining range, and the economic quality and efficiency of the non-epidemic prevention materials will continue to improve; the production growth rate of the industry will enter a downward channel; the export of masks, protective clothing and other epidemic prevention materials will continue to decline, and the export of non-epidemic prevention materials will maintain a good growth trend.
Note: The two-year average growth rate refers to the growth rate calculated by using the geometric average method based on the corresponding number of the same period in 2019.