Coating knowledge: is non-woven wallpaper really environmentally friendly?

Core tip: at ordinary times, people are concerned about whether wallpaper is environmentally friendly Specifically, it should be: whether it contains formaldehyde or discharges formaldehyde However, even if you use solvent based inks in wallpaper, don't be afraid that it will no longer be harmful to human body if it evaporates Especially PVC material, volatile fast There may be a strong irritant smell all of a sudden, but it's easy to get out of the way in a few days Whether wallpaper is environmentally friendly is mainly measured by VOC emissions At present, many people are vague about the concept of environmental protection However, it is very necessary to make clear about this matter, because only when it is clear about this matter, the first Shenyang steel structure fireproof coating construction expert punde Building Fire Engineering Co., Ltd Recommended introduction: since its establishment, Shenyang punde Construction Fire Engineering Co., Ltd has cultivated a group of professional construction teams with excellent equipment, rich experience and serious responsibility with advanced and scientific management methods and strict engineering quality assurance and after-sales service system It has undertaken a number of fire system installation projects, which has been praised by customers Every idea and special requirement of you will be fully considered by us and fully realized in the construction technology, which will become the cornerstone of our successful long-term development We are looking forward to your invitation, to provide you with quality services and high-quality technical support! All construction coatings have passed ISO9001 Paint Home News: usually we are concerned about the environmental protection of wallpaper, specifically, it should be: whether it contains formaldehyde or emissions of formaldehyde However, even if you use solvent based inks in wallpaper, don't be afraid that it will no longer be harmful to human body if it evaporates Especially PVC material, volatile fast There may be a strong irritant smell all of a sudden, but it's easy to get out of the way in a few days Whether wallpaper is environmentally friendly is mainly measured by VOC emissions At present, many people are vague about the concept of environmental protection However, it is very necessary to make it clear, because only when it is clear, everything about this matter will be better The environmental protection of building decoration materials can be divided into three aspects: first, whether the materials themselves use too much natural resources; second, whether the materials can be naturally degraded after being abandoned (commonly known as rotten); third, whether the materials discharge VOC too much and continuously in the use process, and whether toxic substances are discharged in the degradation process In order to enhance the pertinence, the first article is not explained here, because in fact, everyone is not so concerned about this matter Now, we need to focus on the second one Compare non-woven with PVC PVC is a chemical product, synthetic resin, high polymer and derivative product of petrochemical industry PVC has strong plasticity and is widely used The clothes we wear and the special dishes and chopsticks in the microwave oven at home are or at least contain PVC materials This kind of material is very difficult to be degraded in nature, and it will take hundreds of thousands of years to break the polymer chain and complete the degradation process So it's not environmentally friendly Nonwoven paper (commonly known as non-woven fabric) is a kind of weaving without direction, that is, non warp and weft weaving Its structure is relatively loose and it can be easily disintegrated in nature Therefore, compared with PVC, it is a more environmentally friendly material The comparison of environmental protection between the two materials is based on the degree of environmental pollution or the amount of energy (or natural resources) used to reduce these materials after they are discarded In addition, if we want to talk about the purity of the material itself, PVC belongs to high polymer, which is relatively simple; on the contrary, the material of non-woven fabric is relatively disordered, and non-woven is a weaving method, not the material itself It can be nonwoven The third is about VOC emissions VOC = volatile organic compounds = volatile organic compounds = formaldehyde, ether, ethanol, etc since we are most concerned about formaldehyde, it is called formaldehyde emission for short Is this in the wallpaper? It depends on the situation Are all non-woven materials without VOC, PVC materials will have? No There is a kind of ink called water-based ink, and the auxiliaries used in the coloring process are water, ethanol and other materials, which is very environmentally friendly; there is also an ink called solvent based ink (commonly known as oil-based ink), and the auxiliaries used in the coloring process are organic solvents, volatile organic compounds, containing formaldehyde, which is not environmentally friendly For PVC materials, because the structure is relatively compact, formaldehyde and other short base compounds can not penetrate, so formaldehyde and other compounds adhere to the surface of PVC materials, which is easy to volatilize, and will basically volatilize in a few days This volatilization process is called VOC emission For non-woven materials, because the structure is relatively loose, organic solvents can penetrate into the materials, and the volatilization process of formaldehyde and other compounds is relatively slow For many manufacturers, especially big brands, this solvent based ink is rarely used Even if there is one, it will add links in the production process to complete VOC emission in the production process In fact, in the process of home decoration, the most afraid is not wallpaper, but composite board (not solid wood) Because the VOC emission of composite plate is relatively slow, it will take months or even years The real outstanding wallpaper is almost not non-woven fabric At present, it is said that non-woven fabric is the most environmentally friendly, including the salesmen and the owners of many stores I think it's strange Why do you want to say it like this? Do you really don't understand? Are you afraid that customers will be instilled in other wallpaper stores like this to lose business? Or No! The key is that the raw materials of non-woven wallpaper are not expensive, the technology is simple, the advertising can be sold at a high price, and the biggest profit is here I don't know about other countries, but at least not in Europe In fact, most of the world's big brands, whether they are Marburg's or AISI's or zhanbaidi's, are made of PVC Among them, the wallpaper of Italy's zhanbaidi is all PVC deep embossed Now it seems that only our country in the world is very enthusiastic about non-woven wallpaper, because: from the past few years, non-woven bags are gradually used in supermarkets instead of plastic bags, and non-woven bags are environmental protection bags On the reasoning: non-woven is environmental protection Environmental protection is definitely necessary, but formaldehyde emission is not too concerned Domestic manufacturers like to produce and sell non-woven fabrics There is a problem of technological level and profit driven The non-woven fabric is suitable for the current technology level of domestic manufacturers (no embossing roller is needed, and the printing roller is used) No matter deep embossing or light embossing on PVC surface, embossing roller is needed, which costs a lot The cost of laser engraving is 20000 yuan in China, and that of manual engraving is even more expensive In Italy or Germany, a hand carved embossing roller often needs hundreds of thousands of euros, which is very delicate and works of Art) Because of this, the PVC surface wallpaper with good technology needs very large initial investment If the market recognition is not high, the input of embossing roller will be watered and the risk is very high The printing roller used for non-woven fabric only needs more than one thousand yuan, with small investment and quick effect It's not a pity to throw it away after failure So domestic manufacturers are very willing to produce non-woven wallpaper It seems that the principle of "short, smooth and fast" should be strictly implemented In fact, there are two major defects in non-woven materials: first, in coloring, there is always a bit of paste, because the surface of non-woven materials is not dense enough, and the color should be penetrated Second, the use of oily ink, oily ink additives will penetrate into non-woven materials, formaldehyde is more difficult to release Test method: smell, not ask But the price of non-woven fabric is unreasonably high What's the good about it? In terms of expressiveness, no matter in color or surface technology, it's not as good as PVC In fact, non-woven fabric is a good choice to express the feeling of introverted and quiet A lot of guests have designated non-woven fabric What's the best about non-woven fabric? Is it the wall feeling you need? As for the air permeability, the key is to find out whether you want the wall or people to breathe People breathe, by the window, by the air The wall is breathable, and the wallpaper is bound to get moldy Explanation: after the wall is sealed with base film or varnish, the impurities in the wall will not penetrate out, that is to say, the wall itself is airtight In addition, the non-woven fabric used to make the bottom (not the surface) of wallpaper is good, the upper wall will be more fit, that's all The price of non-woven fabric raw materials used for wallpaper is about 30000 yuan per ton, while the price of non-woven fabric raw materials imported by Germany's osron is about 40000 yuan per ton A roll of 5.3 square meters of non-woven wallpaper weighs about 1 kg That is to say, the cost of each roll of a kilogram of non-woven wallpaper is about 40 yuan Taking into account the loss in the production process, the cost of a roll will not exceed 50 yuan So now Taobao's non-woven wallpaper (less than one kilogram, even when it comes, it's also the weight of foaming or flocking and other surface materials, not the weight of non-woven materials) can also provide the package service, the reason is here [focus on WeChat official account "paint net"; pay attention to surprises, scan code to see if your husband is selling paint.. 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