1 against visual pollution Child color expert Clina pointed out: "Children's color psychology research shows that color has a lot to do with the child's psychology, emotions, and personality. The child's choice of color can even reveal whether his mood was happy or sad. If the colors of the children's living space are dark tones, the children's personality is very unfavorable." Therefore, when painting the walls and ceilings of children's rooms, choosing furniture, and posting pictures, try to choose those colors that are softer and brighter, such as pink and sky blue, and pay attention to the contrast of colors, such as the combination of red and pink, and avoid using them. Dark purple, dark grey and other depressing colors 2 Anti-bio-pollution The carpet can easily absorb dust and dust mites in the air. The child's delicate skin can easily be infected by the mites and cause inflammation of the skin. Therefore, in the children's room, be sure not to lay carpets. 3 Anti-air pollution Anti-air pollution, as the name implies, is against harmful gases. Child's injury. Research confirms that children's respiratory volume is 50% higher than that of adults. Compared with adults, children live longer indoors and their immunity is far lower than that of adults. These characteristics determine that children are more vulnerable to indoor air pollution than adults. At present, the main sources of toxic gas pollution in children's rooms come from paint, flooring, and furniture. Poor paints, floors, and furniture materials will emit a lot of harmful gases such as formaldehyde and benzene. Excessive formaldehyde can cause nasopharyngeal discomfort in children, cough asthma, acute and chronic bronchitis, can also cause children's skin allergies, cornea, conjunctival congestion and inflammation; severe, can cause nausea, vomiting, gastrointestinal disorders in children. Benzene is even more harmful. It is a toxic substance released by the World Health Organization. It can cause cancer and cause mutations. It is a major cause of childhood leukemia in recent years. Therefore, in order to avoid the harm of formaldehyde, benzene and other harmful substances, parents should use children's decoration materials, such as children's paint, solid wood panels, and environmental protection children's furniture, when decorating children's rooms. And when choosing these children's decoration materials, they should try to choose some well-known big brands, such as Mickey, Dulux, Nippon, etc., and their safety is generally guaranteed. 4. Anti-noise pollution At present, there are more than 70 million people suffering from deafness and hearing loss in the world, and most of them are in the period of infants and children. In addition to a few children with drug deafness and otitis media, most of the children are caused by domestic noise. If they live in noisy noise all year round, the ears are often subjected to strong sounds that can damage hearing. The damage to the inner ear caused by noise is a cumulative result. The earlier the inner ear is harmed, the more chance it will be for hearing impairment that affects the quality of life. School-age children who suffer long-term noise stimuli may experience irritability, lack of patience, lack of sleep, and lack of concentration, resulting in decreased academic performance. Therefore, if the family location is relatively close to noisy downtown or street, then the children's room must be selected when the soundproofing doors and windows. The volume of TVs and stereos at home should also be kept to a minimum. 5. Anti-heavy metal pollution Heavy metal pollution should be the enemy of children’s health. Children often touch the walls, floors, and other places where they have been painted, as well as the habit of sucking their fingers. If parents are using inferior paint, harmful substances such as lead, manganese, and other heavy metals in these inferior paints are easily lost. Absorption by children, resulting in heavy metal poisoning, has irreversible damage to the child's brain, reproductive organs, etc., IQ will be greatly reduced, reproductive organs will be stunted or deformed. Therefore, when parents choose coatings, they must choose the big environmental protection paints that meet the EIA standards, such as Dulux, Nippon and other international brands; or use the least harmful children's paints, such as Mickey Children's Paint and Dulux. Three Tree Paint Children's Room Paint Furniture Formaldehyde Paint Room Home Furnishing Decoration Home Furnishing
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.bbq-grillgrate.com
(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.
Children's room decoration how to avoid decoration pollution
The children's room is the key to the home improvement. For children in all aspects where the development is not yet mature, the children's room decoration pollution must pay attention to