Many owners ensure the quality of house decoration, prevent indoor environmental pollution, go to the formal building materials market, and buy green decoration materials that meet the national standards. The following small series details the seven major categories of green materials . · Basic non-toxic and harmless type: refers to a natural, self-existent or rarely toxic and harmful material, and a simple processing of decorative materials without contamination. ·Environmental wall materials: A newly developed type of aerated concrete bricklaying, which can be cut and shaped with woodworking tools and masonry with a thin layer of mortar. The surface is coated with special napped pulp powder, which has the effect of thermal insulation and energy storage. · Green wall decoration: grass wallpaper, hemp wallpaper, yarn silk wall covering and other products, with moisturizing, insect repellent, health care and other functions. The mildew-proof wallpaper has been chemically treated to eliminate the appearance of mildew, foaming, and mildew that occur when the wallpaper is wet or when there is a large temperature difference between the interior and exterior, and the surface is soft and has good air permeability. ·Environmental protection pipe: The plastic metal composite pipe is a high-tech product replacing the metal pipe. Its inner and outer layers are high-density polyethylene materials, and the middle is aluminum. It combines the excellent properties of plastics and metals, and it does not rust or pollute. . ·Environmental paint: Bio-emulsion paint, in addition to the construction is simple, there are a variety of colors, can bring colorful colors to the home. After brushing, it will emit bursts of fragrance, and it can also be re-brushed or treated with detergents to inhibit mold in the walls. ·Environmental lighting: This is a lighting system that aims to save energy and protect the environment. Through a scientific lighting design, using efficient, safe, high-quality lighting electrical products, creating a comfortable, economical, and beneficial lighting environment. · Environmentally friendly materials: Grass-planting paving tiles are one of a variety of porous paving products made from recycled high-density polyethylene. It can reduce storm runoff, reduce surface water pollution, and drain surface water. Used in public facilities. Information on green materials was introduced here for everyone. I hope this article will help you. If you still have anything you don’t understand, you can follow our website and we’ll get back to you as soon as possible. Green latex paint brand laminate flooring environmental protection green wardrobe brand green putty powder composite flooring environmental protection
Although there are many types of tapping screws, they all have the following similarities: Round head Tapping screw,hex tapping screw,flat head tapping screw,pan head tapping screw,truss head tapping screw Shenzhen Lanejoy Technology Co.,LTD , https://www.brassinsert.net
Such as plaster, talc, sand, wood, some natural stone and so on. 
(1) are generally made of carbonized carbon steel (accounting for 99% of total production). It can also be made of stainless steel or non-ferrous metals.
(2) The product must be heat treated. Carbon steel tapping screws must be carbonized and stainless steel tapping screws must be solution hardened. In order to make tapping screws to meet the requirements of the standard of mechanical properties and performance.
(3) The product surface hardness is high, the core toughness is good. That is, "soft inside strong outside". This is a major feature of tapping Screw performance requirements. If the surface hardness is low, it can not be screwed into the matrix; If the core toughness is poor, a twist will break, can not be used. So "inside soft outside steel" is self-tapping screw to meet the use of performance, very important requirements.
(4) The surface of the product needs surface protection treatment, generally electroplating treatment. Some product surface must be treated by phosphate (photostatting), such as wall panel self - tapping screws for photostatting.
(5) Production by cold heading process. It is recommended to use high-speed cold heading machine and high-speed wire rolling machine or high-speed planetary wire rolling machine. High speed is emphasized here to ensure product quality. Only the head of tapping screw produced by high-speed machine is well formed and the thread quality is high.