How fast is the door and window industry progressing?
In ancient times, small-scale defensive building groups had appeared. Square or fan-shaped buildings piled up with stones were used as doors. At that time, there was no function that could be opened. They only piled up with stones and covered with straw mats, trunk splicing for ventilation and lighting.
In the pre-Qin era, bronze and iron casting began to develop rapidly, and they also began to pursue practicality and aesthetics for their accommodation, and the windows had been initially formed. In ancient times, double fans were called doors, single fans were households, and later generations were called doors. Households and Windows refer to doors and windows respectively. Later, in Sui and Tang dynasties, the window design had been very perfect, and various shapes of sash windows appeared, which were covered by paper. The Water Margin showed that bamboo poles or sticks needed to be used.
After the Tang Dynasty, lattice door (called partition board in Qing Dynasty) appeared. Some of the ancient lattice door were pasted with paper or oyster shell pieces, which could block light and prevent wind. In modern times, some lattice door of the grid eyes are covered with glass, and some are covered with chemical fibers instead of paper. In the Song Dynasty, it evolved into a form of push-pull.
Then the Qing Dynasty used window frames because there was no glass. When the Ming and Qing dynasties came, paper was widely used on Windows. In cold areas, some windows had to be pasted with two layers of paper. In the past, there was a saying that "the three monsters in northeast China, window paper paste outside", actually it is not paste outside, it is paste on both sides, and it looks like paste outside, because it often snows in the northeast, if the snow is immersed, window paper will soon break down, so it must be pasted on both sides.
In modern times, we all pursue excellence. No matter the shape of doors and windows or the opening method, there are all kinds of doors and windows. Only what you can't think of is not what our modern technology can't do. From ordinary to systematic, and then to the present intelligence, the recently sought-after electrically controlled dimming Glass has become a new favorite in the door and window industry! The transparency of the glass can be controlled by the current intensity.
The principle is that a layer of light adjusting LCD film (PDLC) is placed between the glass, which is tightly fixed between the two pieces of glass by a composite glue. When the power is applied, the polymer liquid crystal materials in LCD film will be arranged orderly under the action of electric field, so that the light can easily penetrate the glass and become transparent. Otherwise, when the power is turned off, polymer liquid crystal materials will be disturbed and cannot be sorted into atomization state normally, which makes you unable to see through at all. It can replace the curtain with clear projection. It can be applied to many fields: Conference Room, stage, curtain wall and window.
The times are progressing and science and technology are innovating. No matter what the doors and windows will become in the future, the most important thing now is to do what is in front of us. If you take every step well, you will be one step closer to success!
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Edit: doors and windows online-Yanzi
