The main buyers (BASF, Bayer MaterialScience, Dow Chemical, and Huntsman) did not resist the price increase.
Buyers said that TDI prices rose by 10 cents per pound on February 17 and rose by 10 cents/lb and 5 cents/lb on March 1 and March 15, respectively.
Due to the high prices of raw materials**, MDI prices rose by 10 cents/lb on March 1.
Soft foam prices rose 10 cents/lb on February 17th, 10 cents/lb on March 1 and 15 cents/lb for copolymers.
Another wave of upswing in the price of polyols is expected to increase by 10 cents/lb on March 29.
Vendors stated that the price increase will be implemented as planned, which is mainly due to the shortage of TDI and polyol supply, and the increase in MDI costs.
At the end of the year, inventory was low, and demand for downstream markets such as automobiles, furniture, bedding, and construction industries pushed up polyurethane prices.
The March 1 copolymer polyol price increase was implemented at 10 cents/lb.
BASF said that due to the 30-day overhaul of the Louisiana Gesner device from February 15th, the company currently only maintains a 80% allocation. Bayer MaterialScience kept the volume of goods at 90% under the situation of declining inventory, so TDI supply is currently tight.
TDI bulk price before the pull up is 1.25-1.40 US dollars / pound (delivered price), crude MDI bulk price is 1.07-1.22 US dollars / pound (send price), ordinary bulk polyether is 0.95-1.15 US dollars / pound (Delivery price).
LED Lamp Bead light-emitting principle
The terminal voltage of the PN junction constitutes a certain potential barrier. When the forward bias voltage is applied, the potential barrier drops, and the majority carriers of the P region and the N region diffuse to each other. Since the electron mobility is much larger than the hole mobility, a large number of electrons will diffuse into the P region, which constitutes the injection of minority carriers into the P region. These electrons recombine with holes in the valence band, and the energy obtained during recombination is released in the form of light energy. This is the principle of PN junction light emission.
Features of LED Lamp Beads
1. Voltage, LED lamp beads use low-voltage power supply, and the power supply voltage is between 2 and 4V, which varies according to different products, so it is driven by a high-voltage power supply. Safer power supply, especially for public places.
2. Current, the working current is between 0 and 15 mA, and the brightness becomes brighter with the increase of the current.
3. Efficiency, energy consumption is reduced by 80% compared with incandescent lamps with the same luminous efficiency.
4. Applicability, very small, each unit LED chip is 3 to 5 mm square, so it can be prepared into various LED lamp bead shaped devices, and is suitable for variable environments.
5. Color, changing the current can change color. The light-emitting diode can easily adjust the energy band structure and band gap of the material through chemical modification methods to realize red, yellow, green, blue and orange multi-color luminescence. For example, an LED that is red when the current is small, can turn orange, yellow, and finally green as the current increases.
Led Lights,In-Line Led Light Emitting Diode,In-Line Led Short Feet,1W High Power Lamp Beads
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