Paint knowledge|Paint knowledge

Core tip: how to choose paint, we are used to call it paint Whether it's high-level decoration or ordinary decoration, it will use paint The first function of paint is to protect the surface, and the second is to decorate it For wood products, because the surface of wood products is porous structure, it is not resistant to dirt, and the surface is multi segmented, not beautiful Paint can solve these problems at the same time This paper introduces the type, selection and precautions of paint Of course, because there are too many kinds of paint, we only introduce the decoration part 1 Classification of paint 1) classification by parts oil 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: how to choose paint paint, we used to call it paint Whether it's high-level decoration or ordinary decoration, it will use paint The first function of paint is to protect the surface, and the second is to decorate it For wood products, because the surface of wood products is porous structure, it is not resistant to dirt, and the surface is multi segmented, not beautiful Paint can solve these problems at the same time This paper introduces the type, selection and precautions of paint Of course, because there are too many kinds of paint, we only introduce the decoration part 1 Classification of paint 1) classification by parts The paint is mainly divided into wall paint, wood paint and metal paint Wall paint includes exterior wall paint, interior wall paint and top finish paint, mainly latex paint, etc.; wood paint mainly includes nitrocellulose paint, polyurethane paint, etc.; metal paint mainly includes enamel paint 2) Classification by status Paint can be divided into water-based paint and oil-based paint Emulsion paint is the main water-based paint, while nitrate paint, polyurethane paint, etc are mostly oil-based paint 3) By function Paint can be divided into waterproof paint, fireproof paint, mildew resistant paint, mosquito resistant paint and multifunctional paint with various functions 4) Classification by action form Paint can be divided into volatile paint and non-volatile paint 5) Classification by surface effect Paint can be divided into transparent paint, translucent paint and opaque paint 2 Type of paint 1) wood paint (1) Nitrocellulose varnish Nitrocellulose varnish is a kind of transparent paint made by nitrocellulose, alkyd resin, plasticizer and organic solvent It belongs to volatile paint and has the characteristics of fast drying and soft luster Nitrocellulose varnish is divided into bright, semi matte and matte, which can be selected as needed Nitrocellulose paint also has its disadvantages: white color, low fullness and low hardness in high humidity (2) Paint by hand Nitrocellulose varnish belongs to nitrocellulose paint It is a kind of non transparent paint made of nitrocellulose, various synthetic resins, pigments and organic solvents This paint is specially prepared for manual construction and has the characteristics of quick drying (3) The main auxiliary agent of nitrolacquer: a tiannashui It is a kind of colorless and transparent liquid with banana smell, which is composed of ester, alcohol, benzene, ketone and other organic solvents It mainly plays the role of mixing nitrolacquer and curing b White water Also known as anti white water, scientific name is glycol monobutyl ether In wet weather, the paint film will turn white, which can be eliminated by adding 10% - 15% diluted nitro magnetized white water (4) Polyester paint It is a kind of thick paint which is mainly made of polyester resin The film of polyester paint is full and thick with hard surface Polyester paint also has a variety of varnish, called polyester varnish Polyester paint needs to be cured in the construction process, and the proportion of these curing agents accounts for one third of the total content of the paint These hardeners, also known as hardeners, are mainly TDI (toluene diisocyanate) These TDI in the free state will turn yellow, which not only makes the furniture paint surface standard, but also makes the adjacent walls turn yellow, which is a major disadvantage of polyester paint At present, yellow resistant polyester paint has appeared on the market, but only "yellow resistant" can be achieved We can't prevent code change completely In addition, the free TDI beyond the standard will cause harm to human body (5) Polyurethane paint Polyurethane paint is polyurethane paint It has strong and tough paint film, full luster, strong adhesion, water resistance, wear resistance and corrosion resistance It is widely used in advanced wood furniture and metal surface The main disadvantages of the paint are wet foaming, film pulverization and so on Like polyester paint, it also has the problem of yellowing The type of polyurethane varnish is called polyurethane varnish 2) Interior wall paint Interior wall paint is mainly divided into water-soluble paint and emulsion paint Generally, emulsion paint is used for decoration Latex paint is a latex coating, according to the different substrates, divided into two categories: Polyester acid vinyl emulsion and acrylic emulsion Emulsion paint with water as diluent is a kind of paint with convenient construction, safety, washability and good air permeability Different colors can be prepared according to different color schemes Latex paint is mainly composed of water, pigment, emulsion, filler and various auxiliaries These raw materials are non-toxic, and the main toxic materials are glycol in film-forming agent and organic mercury in mildew inhibitor At present, the so-called "emulsion paint" which contains a lot of formaldehyde in the market is actually water-soluble paint, not emulsion paint Some illegal manufacturers use inferior water-soluble paint to fake emulsion paint Therefore, it is an effective way to prevent pollution to choose positive cargo and keep ventilation 3) Exterior wall paint The basic performance of exterior wall emulsion paint is similar to that of interior wall emulsion paint However, the paint film is hard and has stronger water resistance Emulsion paint for exterior wall is generally used for exterior wall, and it can also be used in toilet and other places with high humidity Of course, the exterior wall latex paint can be used internally, but please do not try to use the interior wall latex paint externally 4) Fire retardant paint Fire retardant paint is a kind of fire retardant paint made of film-forming agent, flame retardant, foaming agent and other materials At present, a large number of flammable materials such as wood and cloth are used, so fire prevention is a worthy topic 3 Selection of paint (1) choose the appropriate paint type according to your own needs We should not blindly pursue a kind of "advanced", let alone choose some inferior products for the sake of low price (2) Try to buy it in a specialty store or a large store, and pay attention to its packaging (3) Don't trust the advertising data You need to be concerned about whether the product meets the national standard (GB) How to choose latex paint is a big item in home decoration How to choose latex paint is a very concerned problem for every user The following indexes should be considered in the selection of emulsion paint: environmental protection index: whether the content of formaldehyde, lead, mercury and other harmful substances in emulsion paint is up to the standard Scrubbing resistance: scrubbing resistance is an important indicator, because it is impossible to brush the wall immediately if it is dirty Quality price ratio: this index is actually a question that we should consider when choosing any product The well-known brand is not the product with the best price ratio, because there are advertising expenses in its cost In addition to the above points, the area of wall painting latex paint is very large, and the color matching in front of it has a great impact on the final effect, so it is necessary to find a designer with color background Which kind of good wall coating is the key point of room decoration In the bedroom, people's vision is often focused on the wall first, so in the face of a variety of coatings on the market, which is the best choice? The common interior wall coating can be divided into the following categories: low-grade water-soluble coating, which has the advantages of low price, convenient construction and non-toxic But its obvious shortcomings are poor durability and yellowing Multi color spraying can form multi-color pattern after spraying, elegant and solid Its advantages are oil resistance, alkali resistance are very strong, and can be washed with water The paste like interior wall coating has a smooth surface like porcelain, non-toxic, tasteless, good permeability and low price But its temperature resistance and scrub resistance are poor Emulsion paint is characterized by mercerization, satin like, strong covering power, soft and durable color, simple construction and easy cleaning Kitchen, toilet because of the oil smoke fog and moisture, so the best choice of easy to clean wall decoration materials, such as: glazed tiles, mildew resistant PVC wall cloth or latex paint In a word, no matter what kind of paint you choose, you should not only consider the adaptation to the overall style of the room, the preferences of family members, but also choose according to your own economic situation Interior wall coating part: 10 kinds of conditions apply medicine to the case 1 Mark: blackened area Seating: scrape off traces, remove nodules, and repaint when dry 2 Check mark: paint drop and overflow Seating: after the paint is dry, polish it with sandpaper, remove dust and paint again 3、 Check: wrinkles Seating: if the first coat of paint is not dry and the second coat is applied, wrinkles will occur It should be scraped off and repainted 4 Check mark: gravel Seating: if the gravel is wrapped in dry paint, grind it lightly with sandpaper, sweep the paint, and wipe it clean after drying 5 Check mark: scar Seating: remove the original paint (if there is a gap, fill it first), lay the primer, and then paint 6 Check mark: uneven coating Seating: if the primer is visible, a layer of paint can be added 7 Check mark: flaky peeling Seating: if the surface is not well treated, the original paint layer shall be scraped off, the surface shall be looked after and repainted 8 Check mark: stain Seating: paint the surface with aluminum primer and repaint 9 Check mark: crack Seating: if the two coats of paint are not compatible, cracks will occur and the original paint will be scraped off and repainted 10 Check mark: black dot Seating: Polish and repaint when dry, remove black spots and finish How to test the quality of coatings? After the cover is opened, it is required to "first look, second smell, and third wipe" to see whether the paint has settlement and caking; second smell whether the paint has odor and irritant smell; third wipe is to brush the paint on the cement floor On, after the coating is dry, scrub it back and forth with a wet cloth If it's latex paint, the coating will not be damaged generally If it's water-soluble paint, scrub it several times to dozens of times, and the coating will lose its powder Judging the quality of coatings depends on the three standards of home decoration can not be separated from coatings, and in the current market, almost all coating manufacturers say that their products are environmentally friendly However, some products not only have peculiar smell, but also crack, peel and mould spots How to distinguish the advantages and disadvantages of coatings? Jiang Heping, senior engineer of Fuya coating company, pointed out that there are three standards to measure the quality of coatings: first, the basic functions of coatings As a kind of decoration, the most important thing is to pass the decoration function, that is, after use, it will not crack, peel, fall off, waterproof and sun proof, pollution-resistant, mildew and bacteria proof, etc Good coating is firm and wear-resistant after use, while poor coating will appear peeling and cracking soon after use Secondly, we should pay attention to the safety and environmental protection performance of coatings Consumers should pay more attention to the spot check results of the national authorities instead of listening to the advertisement alone