Whether the wallpaper that everyone cares about is environmentally friendly, specifically, it should be: whether it contains formaldehyde or formaldehyde. However, even if you use solvent-based ink in the wallpaper, don't be afraid. If it evaporates, it will not hurt the human body. Especially for PVC materials, it evaporates quickly. There may be a strong pungent odor at once, but it's easy to be a little bad in a few days. Whether the wallpaper is environmentally friendly is mainly measured by VOC emissions. At present, many people are vague about the concept of environmental protection. However, this matter is very necessary to clarify, because only after it is clear, everything about this matter will be better. The environmental protection of building decoration materials is divided into three aspects: first, whether the material itself uses too much natural resources; secondly, whether the material can be naturally degraded after the material is discarded (commonly known as: rotten); again, the material is in use Whether or not the VOC is discharged excessively and continuously, and whether or not toxic substances are emitted during the process of derating. In order to enhance the pertinence, the first article will not be explained here, because in fact everyone is not so concerned about this matter. Now, the second thing to focus on is the need to talk about it. Compare non-woven and PVC. PVC is a chemical product, a synthetic resin, a high molecular polymer, and a derivative of petrochemicals. PVC has strong plasticity and is widely used. Everyone wears clothes, special tableware for microwave ovens at home, etc., or at least contains PVC material. This kind of material is difficult to solve in the natural world, and even hundreds of thousands of years can break the polymer chain to complete the process of solution. So it is not an environmentally friendly material. Non-woven paper (commonly known as non-woven fabric) is a kind of weaving with no directionality, that is, non-latitude weft weaving, the structure is relatively loose, and it can be easily dissolved in nature, so it is more environmentally friendly than PVC. s material. The environmental friendliness of these two materials is based on the degree of environmental pollution they have been discarded or the amount of energy (or natural resources) used to decompose them. In addition, if you want to talk about the purity of the material itself, PVC, is a high molecular polymer, relatively simple; instead, the material of the non-woven fabric is chaotic, non-woven is a weaving method, not the material itself. It can be a non-woven material. The third article is about VOC emissions. VOC=volatile organic compounds=Volatile organic compounds=formaldehyde, ether, ethanol, etc. Since we are most concerned about formaldehyde, it is simply called formaldehyde emission. Is this thing in the wallpaper? It depends on the situation. Isn't there any VOC in all non-woven materials, will PVC materials be there? There is an ink called water-based ink. The additives used in the coloring process are water and ethanol. It is environmentally friendly. There is also an ink called solvent-based ink (commonly known as: oil-based ink). The additives used in the coloring process are organic. Solvent, a volatile organic compound that contains formaldehyde and is not environmentally friendly. For PVC materials, because the structure is relatively dense, short-base compounds such as formaldehyde do not penetrate, so compounds such as formaldehyde adhere to the surface of PVC materials, which are easily volatilized and basically volatilized in a few days. This volatilization process is called VOC emissions. For non-woven materials, because the structure is relatively loose, organic solvents can penetrate into the material, and the process of volatilization of formaldehyde and other compounds is relatively slow. For many manufacturers, especially large brands, this solvent-based ink is used very little, and if it is, it will increase the link in the production process, so that it can complete VOC emissions in the production process. In fact, in the process of home decoration, the most feared is not the wallpaper, but the composite board (non-solid wood). Because VOC emissions from composite sheets are relatively slow, it takes months or even years. Really colorful wallpapers are almost non-woven The current situation is: including a lot of store sales staff, bosses, will say that non-woven fabrics are the most environmentally friendly. I feel very strange about this. Why do you want to talk like this? Do you really understand it? Or are you afraid that customers will be insulted by other wallpaper shops to lose their business? Or... No! The key is that the non-woven wallpaper material is not expensive, the process is simple, the advertisement can be made to sell high prices, and the biggest profit is here. I don't know about other countries, but at least there is no such phenomenon in Europe. In fact, the big brands in the world, whether it is Marburg or Eslite, or the pavilion, the wallpapers that are really colorful are almost all PVC fabrics. Among them, the wallpapers of the Italian pavilions are all deep embossed with PVC. Now it seems that perhaps only the domestic world is very enthusiastic about non-woven wallpaper, because: from the past few years, the supermarket has gradually used non-woven bags without plastic bags, and non-woven bags are environmental protection bags. Just reason: non-woven is environmentally friendly. Environmental protection is definitely a must, and formaldehyde emissions are not too concerned. Domestic manufacturers like to produce non-woven fabrics, sell non-woven fabrics, there are problems with the level of technology, and there are also profits driven. Non-woven fabric is suitable for the current state of the art of domestic manufacturers (no need for embossing rolls, printing rolls are used. PVC surface requires embossing rolls for deep embossing and shallow embossing, the cost of embossing rolls is large, laser engraving pressure The cost of flower roll production starts at 20,000 yuan in China, and it is more expensive to hand-carve. In Italy or Germany, a hand-carved embossing roll often needs hundreds of thousands of euros, which is very delicate and is a work of art). Because of this, the wallpaper of a crafted PVC surface requires a very large upfront investment. In case the market recognition is not high, the investment of the embossing roller will be drowned, which is very risky. The printing roller used for non-woven fabrics is only one thousand yuan, and the input is small, and the effect is quick. It is not a pity to throw it away after the failure. Therefore, domestic manufacturers are very willing to produce non-woven wallpaper. It seems that strict implementation of the "short and fast" factory guidelines. In fact, non-woven materials have two major drawbacks: First, in coloring, it is always a bit sloppy, because the surface of the non-woven material is not dense enough, the color should penetrate. Second, if an oily ink is used, the additive of the oily ink will penetrate into the non-woven material, and formaldehyde is more difficult to release. Inspection method: smell rather than ask. However, the price of non-woven fabrics is unrealistically high. Where is it good? On the expression, whether it is color or surface technology, it is not as good as PVC. In fact, non-woven fabrics are a good choice when expressing a feeling of restraint and calmness. Many guests have specified non-woven fabrics. Where are the non-woven fabrics? Is it the wall feel you need? As for the permeability, the key is to find out whether the wall is breathable or breathable. People are breathable, by the window, by the air. The wall is breathable and the wallpaper will definitely be moldy. Explanation: After the wall is sealed with a base film or varnish, the impurities inside the wall will not penetrate, that is, the wall itself is airtight. In addition, the non-woven fabric used to make the bottom layer of the wallpaper (not the surface layer) is good, the upper wall will be more docile, nothing more. The price of non-woven raw materials used as wallpaper is: about 30,000 yuan a ton, while the raw materials imported from Germany Oslo are about 40,000 yuan per ton. A roll of 5.3 square meters of non-woven wallpaper, weighing about 1 kg. That is to say, the cost of a kilogram of non-woven wallpaper per roll is about 40 yuan. Counting the loss in the production process, the cost of a roll will not exceed 50 yuan. So now Taobao has a non-woven fabric of 70 yuan and a roll of non-woven fabric (less than one kilogram, even if it is the weight of the surface material such as foaming or flocking, not the weight of the non-woven material) The reason for the service is here. [Follow the WeChat public number "Jiuzheng Paint Network"; pay attention to surprises, scan code to view "If your husband is selling paint..." Jiuzheng Coating Network Exchange Group]
1.Application : For auto parts
OD
OD Tolerance
ID
Tolerance
Roundness
Straightness
Circular
run-out
φ16-20
±0.02
±0.02
0.01↓
0.015↓
0.05↓
φ20-30
±0.02
±0.02
0.01↓
0.015↓
0.05↓
φ30-50
±0.05
±0.05
0.02↓
0.020↓
0.08↓
φ50-80
±0.15
±0.10
0.05↓
0.025↓
0.10↓
7. Trade Terms Extrusion Tube For Auto Parts,Aluminum Extruding Tube,Aluminium Extrusion Pipe,Aluminum Alloy Extrusion Pipe Changzhou YiFei Machinery Co., Ltd. , https://www.yifeialu.com
2.Dimension: Customized dimension, OEM & ODM
3.Material: A6063, A6061, A3003 and other series alu alloy
4.Suface treatment: Anodizing, polishing, turning ,power coating, mill finish etc
5.Equipment: CNC ,extruding machine, cold drawn machine, heating oven, straightening machine, cutting machine
6. STANDARD PACKING:Wooden case/carton
1. Payment: 30% T/T in advance, 70% balance pay before delivery. L/C at sight.
2. Delivery time: 20 days after deposit receiverd. If opening mould, plus 7-10 days.
3. Trade Term can be chosen depending on your requirements.
4. FOB Port: Shanghai
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