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Anonymous users2024-01-241. All PVC materials are a kind of plastic decorative materials, which is the abbreviation of polyvinyl chloride materials, and PVC (Polyvinyl Chloride, referred to as PVC) resin is a thermoplastic polymer polymerized by vinyl chloride monomer (VCM). It is made of polyvinyl chloride resin as the main raw material, adding an appropriate amount of anti-aging agent, modifier, etc., through mixing, calendering, vacuum blister and other processes. PVC is an amorphous polymer containing microcrystals with a crystallinity of 5%-10% (melting point 175 degrees).
The physical energy of PVC, such as molecular weight, crystallinity, and softening point, varies with the polymerization reaction conditions (temperature). PVC resin plastic is made by plasticizing and molding with a variety of additives such as stabilizers, plasticizers, fillers, colorants and modifiers. PVC material has the characteristics of lightweight, heat insulation, heat preservation, moisture-proof, flame retardant, and easy construction.
There are many specifications, colors, patterns, and they are highly decorative, and are widely used in production and life. For example, PVC water pipes, PVC plastic doors and windows, as well as plastic toys containing PVC, wires and cables. Due to its harm to the human body, Europe, Japan, South Korea and other countries have imposed restrictions on products using PVC as raw materials.
The outstanding advantages of general PVC resin plastic products are flame retardant, wear-resistant, chemical corrosion-resistant, low gas and water vapor, and good leakage. In addition, it is a general-purpose material with the most superior energy-to-price ratio due to comprehensive mechanical energy, product transparency, electrical insulation, heat insulation, sound reduction, and shock absorption. The defect is that it is thermally stable and has poor impact resistance, and it is easy to produce brittleness during the use of both hard and soft PVC.
Generally, PVC contains bis(2-ethylhexyl) adipate (DEHA) plasticizer that is not allowed to be used by relevant national standards, and DEHA is easy to be released at high temperatures (more than 100 degrees Celsius), which is harmful to health after contact with the human body. Because PVC is a hard plastic, to make it soft, a large amount of plasticizer must be added, and the plasticizer is easily released in a heated environment. If DEHA is used, it can interfere with the body's endocrine system, causing breast cancer in women, birth defects in newborns, decreased sperm count in men, and even mental illness.
Flat ceilings.
It is equivalent to adding a flat plate to the top surface, and usually adding an auxiliary light source inside. Generally, it is only used in small areas such as foyers and restaurants. In order to increase thermal insulation, flat ceilings are also used on the top floor. If the area used is large, it is recommended to use it when the room height is greater than meters. >>>More
The materials of the ceiling generally include integrated ceiling, light steel keel, gypsum board, aluminum gusset plate, and aluminum-plastic panel. >>>More
1. Concave and convex type
This style of kitchen ceiling is often referred to as a moulded ceiling, specifically a form of ceiling with a convex or recessed surface. The shape of this kind of ceiling is more complex and varied, with a strong sense of hierarchy, and is usually suitable for top decoration such as kitchens, halls, foyers, restaurants, etc., and it is often used with lamps and lanterns, including ceiling lights, chandeliers, downlights, spotlights, etc. It has a strong artistic atmosphere, so it is loved by people who like art. >>>More
1. All ceiling ceiling styles, that more goes.
Classification of forms.
1. Flat type. >>>More