Simple solar-powered seawater desalination pond
A technology of solar cells and solar energy, applied in seawater treatment, water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as difficult deployment, high degree of crystallization, and inability to seal the reaction
Inactive Publication Date: 2014-04-23
GUANGDONG GUANGHAIDA IND
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Problems solved by technology
[0007] However, low-temperature extrusion is often used to suppress resin decomposition during melting, but the blocking reaction cannot be completely carried out at low temperatures. At the same time, the crystallization degree of the crystallization nuclei of the unmelted components in the low-temperature resin raw material is relatively high on the film, and the tension during stretching is relatively high. too large to fully expand
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[0016] The present invention is further elaborated below in conjunction with specific embodiment:
[0017] Mix a polyester resin with an intrinsic viscosity of 0.6-0.65dl / g and a terminal blocking agent, the proportion of the terminal blocking agent is 0.6-1.2%, melt and knead the two using an extruder, and the polyester film When the melting point is T, the temperature in the extruder area is T°C to T+200°C, and the extrusion process of the molten resin is carried out under this condition.
[0018] The above-mentioned raw materials can also be packaged as a semi-finished premix after being made, and can be used again when needed.
[0019] The polyester resin is an unsaturated polyester resin. The viscosity range is easier to control when unsaturated resin is synthesized.
[0020] The polyester resin is synthesized from trimethylol propane and isophthalic acid, and the viscosity is modified with a diluent. The diluent can be organic alcohols, such as ethanol, or inert inorg...
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Abstract
The invention aims to provide a method for producing a polyester film with good hydrolysis resistance property while the consumption of an end capping agent and the volatilization amount of components in the process are reduced, and a simple solar-powered seawater desalination pond made by using the method. The simple solar-powered seawater desalination pond comprises an inner-layer seawater pond and an outer-layer fresh water pond, wherein a transparent film layer is attached on the top and is used for wrapping the fresh water pond, a baffle plate is arranged above the fresh water pond, the film layer comprises polyester resin with an intrinsic viscosity of 0.6-0.65dl / g and an end capping agent which are mixed, the end capping agent accounts for 0.2-0.3, and the elongation at break is 100-115 percent. The polyester resin is unsaturated polyester resin and is synthesized from trimethylolpropane and isophthalic acid, and the viscosity modification is performed on the polyester resin by using a diluting agent. The end capping agent is carbodiimide. The water content is controlled between 10ppm and 100ppm.
Description
technical field [0001] The invention relates to a simple solar-powered seawater desalination treatment pool. Background technique [0002] Polyester usually has a large number of carboxyl groups and hydroxyl groups on its surface, and is easily hydrolyzed in an environment containing moisture, which often tends to deteriorate. Therefore, the hydrolysis of polyester used in solar modules needs to be suppressed in an environment that is often exposed to wind and rain, such as outdoors. [0003] In order to make polyester produce hydrolysis resistance, some people carry out catalytic hydrolysis reaction to reduce the terminal hydroxyl group. In order to effectively reduce the terminal hydroxyl group, some effective terminal blocking agents are often used as additives. [0004] However, the polyester resin with end-blocking agent has many disadvantages during melt extrusion. During melt-kneading, the end-blocking agent will produce foreign matter such as gel, and some volatile ...
Claims
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IPC IPC(8): C02F1/14C02F103/08
CPCY02A20/124Y02A20/142Y02A20/212
Inventor 童华东
Owner GUANGDONG GUANGHAIDA IND