Jiangxi Nanchang composite geotextile national standard products

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Geotextile-warp knitted composite geotextile
At present, China's geotextile production capacity exceeds 10,000. As my country attaches great importance to the development of basic industries and the government strongly advocates the application of geosynthetic materials in composite geotextiles, the development of geosynthetic materials will accelerate in the future. It is predicted that the use of geotextiles in my country may reach 10,000 in 2019.
. Raw materials for geotextiles
The raw materials used for geotextiles must not only consider the physical and chemical properties required in the use environment, but also pay attention to the product cost. In terms of performance, the following aspects are mainly considered:
.Good physical and mechanical properties
The working environment of geotextile is harsh. In many cases, it is soaked in water or spread in soil with high humidity, so it must have good physical and mechanical properties. Hydrolysis resistance and wet mechanical properties.
.Resistant to ultraviolet radiation, resistant to hydrolysis, and resistant to high and low temperatures
Geotextiles must be exposed to sunlight, so they must have corresponding UV resistance. Geotextiles must adapt to the temperature requirements when in contact with asphalt and other materials. The melting point is higher. .
.Resistant to chemicals, corrosion, and mildew
Water and soil are very different. Some are alkaline, some are acidic, some contain salt, and some contain various elements, so geotextile must be Chemically stable.
.Good water permeability
Geotextile filtration and drainage both require water permeability, so they must have good water permeability.
.Production process of geotextiles
Consumption of geotextiles by different manufacturing methods
At present, the proportion of non-woven geotextiles to all geotextiles has reached about %, and woven geotextiles account for about %. In the United States, the proportion of nonwoven geotextiles is higher. The ratio of nonwoven geotextiles: woven geotextiles: knitted geotextiles is: ∶. The year is::.
The U.S. geotextile market was analyzed in 2011: staple fiber, needle punched, flat yarn weaving and spunbond needle punched fabrics ranked first in terms of geotextile consumption, and the sum of the three accounted for the total amount of U.S. geotextiles. %. Of course, the current structure has changed a lot.
There are no exact statistics in our country, but generally the dominant ones are short-fiber needle-punched geotextiles and polypropylene flat yarn woven geotextiles, with their shares reaching %-%. The actual annual output of spunbond filament needle-punched geotextiles will not exceed 10,000, accounting for about % of the total. The number of monofilament and multifilament filament woven geotextiles is small.
About woven geotextiles
Woven geotextiles include geotextiles made of monofilament, multifilament, cut film yarn, and film split yarn.
The main characteristics of woven geotextiles are:
High tensile strength and initial modulus, small elongation at break and small creep. The picture is a comparison of the load-elongation curves of woven geotextiles and nonwoven geotextiles.