The market for aluminum alloy doors and windows is getting bigger and bigger. Nowadays, many buildings use aluminum alloy doors and windows, so learning to judge the quality of aluminum alloy materials has become a necessary knowledge for consumers. How to judge the merits of aluminum alloy doors and windows, whether it is aluminum alloy interior doors (including the partition doors) or aluminum alloy windows, decoration owners in the purchase of aluminum alloy doors and windows must pay attention to the following points:
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Aluminum alloy doors and windows to buy attention to a, logo recognition
Manufacturers who have formal or production licenses are required to indicate the product's mark in the obvious parts of their aluminum alloy products, including: manufacturer's name or trademark, product name, product model or mark, manufacturing date or serial number. There should be obvious “moisture proof†and “carefully light†and “upward†words and signs on the packing box.
Aluminum alloy doors and windows to buy attention Second, the surface quality
The quality of aluminum alloy doors and windows surface directly affects the decorative effect of the entire wall after installation. When checking the surface quality of doors and windows, pay attention to the following aspects:
1. Door and window decoration surface should not have obvious damage, it means that the protective film on the surface of windows and doors should not have scratches and scratches.
2. The coloring surface of the adjacent member on the door and window should not have obvious color difference.
3. There should be no aluminum chips, burrs, oil spots or other stains on the surface of doors and windows, and there should be no spilled adhesive at the assembly joints.
Aluminum alloy doors and windows to buy attention three, size deviation
Aluminum alloy door and window frame size deviation is the best.
Aluminum alloy doors and windows to buy attention four, aluminum alloy doors and windows components
The connection of the aluminum alloy door and window components should be firm, and the connection part should be sealed and waterproofed with a corrosion-resistant filler material.
Aluminum alloy doors and windows to buy attention five, see the material
There are six main aspects in the materials used for reference:
1. Thickness: Aluminum alloy sliding doors are available in 70 series and 90 series. The aluminum alloy sliding door in the house can be used with 70 series. The series number indicates the thickness of the door frame thickness in millimeters. Aluminum alloy sliding window has 55 series, 60 series, 70 series, 90 series four. The series selection should be based on the size of the window hole and the local wind pressure value. Aluminum sliding windows used as closed balconies should not be smaller than the 70 series.
2. Strength: Tensile strength shall be 157 Newtons per square meter and the yield strength shall be 108 Newtons per square millimeter. When you buy aluminum alloy doors and windows, you can use your hands to bend the profile moderately, and you should be able to recover after loosening.
3. Color: The same aluminum alloy color should be the same, such as the color difference is obvious, that is not suitable for purchase.
4. Flatness: Check the surface of the aluminum alloy profile, there should be no depression or bulging.
5. Gloss: aluminum alloy doors and windows to avoid the purchase of surface bubbles (white spots) and ash (black spots), as well as cracks, burrs, peeling and other obvious defects in the profile.
6. Degree of oxidation: The thickness of the oxide film should reach 10 microns. When purchasing aluminum alloy doors and windows, you can lightly stroke the surface of the profile to see if the oxide film on the surface can be wiped off.
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Pharmaceutical raw materials encompass elements that are required to manufacture a variety of different drugs. These materials are derived and extracted from sources that could be natural or synthetic. Every pharmaceutical is made up of active ingredients .
Pharmaceutical industry has a lot of constraints and specialties which make it stand on a completely different scale than any other industries. Being closely related to the medical field and also complementary to it, the pharmaceutical industry needs utmost care and precision in each and every aspect of the field ranging from collecting the raw materials to getting the final product ready for supply in the market. ï‚ž Let us get into a few details about the pharmaceutical raw materials and find out some important and interesting facts about them.
We mainly supply Sulfanilic acid & Formic Acid , which are used as raw material for Pharmaceutical industry.
Medicine Raw Material,Formic Acid
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