Polyurethane: short for polyurethane material, the English name is polyurethane, it is a polymer material. Polyurethane is an emerging organic polymer materials, known as the "fifth largest plastic", because of its excellent performance and is widely used in many areas of the national economy. It is widely used in many fields of national economy because of its excellent performance. The application fields of the products involve light industry, chemical industry, electronics, textile, medical treatment, construction, building materials, automobile, national defense, aerospace, aviation and so on.
1. Flexible PU
Cushioning material - such as seats, sofas, mattresses, etc., polyurethane foam is a very ideal cushioning material, cushioning material is also the largest amount of flexible foam applications;
Sound-absorbing materials - open-cell polyurethane foam, such as seats, sofas and mattresses. -Open cell polyurethane flexible foam has good sound absorption and shock absorption function, can be used as indoor sound insulation materials;
Fabric composite materials - shoulder pads, bra sponge, cosmetic cotton; toys.
2. Rigid PU
Refrigeration equipment - such as refrigerators, freezers, cold storage, refrigerated trucks, etc., polyurethane rigid foam is the most ideal insulation material for refrigeration equipment;
Industrial equipment insulation - such as storage tanks, pipelines, etc.;
The industrial equipment heat preservation.
Construction materials - in developed countries in Europe and the United States, polyurethane rigid foam for construction accounted for about 70% of the total consumption of rigid foam, which is more than double the amount of rigid foam used for refrigerators, freezers, etc.; in China, the application of rigid foam in the construction industry is not as common as that of the developed countries in the West, so the development potential is very high. In China, the application of rigid foam in the construction industry is not as common as in developed countries in the West, so the potential for development is very large;
Transportation - such as automobile headliners, interior parts (steering wheel, dashboard), etc.;
Imitation of wood - high-density (density of 300-700kg/m3) polyurethane rigid foam or glass fiber reinforced rigid foam Rigid foam or glass fiber reinforced rigid foam is a structural foam, also known as wood-like, with high strength, good toughness, dense and tough crust, simple molding process, high production efficiency, high strength than natural wood, density can be lower than natural wood, can be used as a substitute for wood as various types of high-grade products.
The material - such as waterproof grouting materials, leakage plugging materials, roof waterproofing materials;
Flower industry - PU flower pots, flower arrangement mud. PU Semi-rigid PU
Energy-absorbing foam body - energy-absorbing foam body has excellent shock absorption, cushioning performance, good resistance to compression load performance and deformation recovery performance, and its most typical application is used in the preparation of automobile bumpers;
Integral Skin Foam (Integral Skin Foam). Integral Skin Foam) - used in the preparation of automotive steering wheel, armrests, headrests and other soft internal functional parts and interior trim. Integral Skin Foam products are typically processed using Reaction InjectionMoulding (RIM);
Microcellular Elastomers - The most typical application for polyurethane microcellular elastomers is in the shoe industry.
Question 2: What kind of adhesive is styrofoam and how to use it? Styrofoam adhesive as the name suggests is a kind of adhesive with foaming properties and bonding properties, it is mainly used for building doors and windows side seams, expansion joints and holes in the components of the filling, sealing, bonding. It is a polyurethane elastic sealing foam material that relies on moisture curing. Foaming gel is composed of polyurethane prepolymer foaming agent catalyst, crosslinking agent, etc. filled into a high-pressure-resistant iron tank and filled with propane and other gases. It is divided into gun type and tube type two kinds, gun type is need special polyurethane foaming gun to use, tube type with disposable hose.
The use of gun-type styrofoam and steps:
① take the foam gun, with polyurethane cleaning agent to ensure smooth;
② and then take the styrofoam, hold the middle of the canister, along the canister transverse direction of the vibration of at least 15-30, be sure to ensure that the canister pre-polymerization of the full mix;
③ remove the protective skin cover of the valve on the threaded ring of the gun styrofoam, take the styrofoam
③ Remove the protective skin cover of the valve on the threaded ring of the gun, remove the cleaning agent on the foaming gun, and load the foaming agent canister onto the interface of the foaming gun by following the threads;
④ Hold the handgrip of the foaming gun tightly, make sure that the canister is placed on the top, and the foaming gun is placed underneath the canister, and open the flow regulating valve at the back of the foaming gun;
⑤ Aim the head of the gun to the bottom of the part or the interior of the part that you want to fill with the object, and gently pull the trigger to start the construction. The flow rate can be adjusted to the proper flow rate through the flow adjustment valve at the back of the foaming gun.
⑥ After a can of spraying, if you want to fill, you can immediately remove the empty can, according to the method in point ③ to reload the blowing agent, continue construction.
⑦ After the construction is completed, remove the material tank in time, replace the special cleaning agent to clean the foam gun, so as not to residual material curing clogging damage to the foam gun.
Tube styrofoam use and steps:
1, and the second step of the gun type.
2, and then take the disposable hose screwed clockwise;
3, to ensure that the tank is placed on top of the foaming gun in the tank below, the object to be filled at the bottom of the part or inside, gently pull the trigger to start construction.
4, spraying from the bottom up, the amount of spray to 80% of the required volume of filling can be (tube filling volume of 2/3)
Tips
When spraying, pay attention to the speed of travel, the amount of spray to the required volume of filling can be usually 2/3. Filling vertical gaps should be from bottom to top; when filling gaps such as on the ceiling, the uncured foam may fall down due to gravity, it is recommended to support it properly just after filling, and withdraw the support after the foam is cured and bonded to the wall of the gaps. 10 minutes or so, the foam will be de-bonded, and can be cut after 60 minutes. Use a knife to cut off the excess part of the foam, and then on the surface of the water mud mortar, paint or silicone coating.
If you help you hope to adopt Oh!
Question 3: What is the role of styrofoam, generally used in which The soundproofing effect is also better than mortar, to make the window and wall tightly combined is more difficult, but also suitable for the installation of windows to use, and then fill the gaps between the practice of filling the gaps is mainly to fill the gaps, piggybacking on the role of some fixed. It is worth noting. Window frame. Especially the wall belongs to the civil engineering, the resulting foam body has a little strength after drying, is to fill the gap. Some "roadside construction" personnel will cut corners and directly use the foam to fix the window frame. As the wall materials and window frame materials belong to the more rigid materials, refers to the transition structure of the wall and window. Window frames press-fit and then hit the blowing agent. Building blowing agent is a kind of polyurethane prepolymer. The so-called blowing agent is a substance that makes the object material into a hole , both suitable for fixing on the wall. The construction usually take according to the requirements and then fixed on the wall after the window frame, fixed role. This installation method. Window frames are fixed on the wall, the window is installed on the window frame, the window frame will fall off if the force is large. Has a strong adhesion properties. Some window frames have the role of fixing as well as preventing the collapse of the surrounding strong body, the accuracy is very poor. Must be fixed in the window frame finish. So in some occasions must be good quality, it can be divided into chemical blowing agent and physical blowing agent and surfactant three categories, there is no any loosening of the case, blowing agent, catalyst and other components filled in a pressure-resistant aerosol cans in the special polyurethane products. Piggyback on some fixed role in filling the gap. Insulation. Used to do the sealing and filling effect is excellent, due to the building foam with adhesive
Question 4: What is the main raw material of polyurethane foam adhesive Polyether polyol (white material), polyisocyanate (black material). Catalyst, hydrating agent, dimethyl ether (dme), propane (lpg). And other chemical raw materials in accordance with a certain ratio ratio synthesis, polyurethane foam adhesive is a poly plant ester foaming technology, and aerosol technology, combined with special polyurethane products.
Question 5: What is the high foam material? Also PEF foam, it is Christine EVA and PE mixed foam material, material characteristics: heat insulation, shockproof, cushioning, climate color fastness, acid and alkali resistance, sound absorption, no pollution, etc.. Packaging, hardware industry, real estate industry, electronics industry, footwear, maintenance, vehicles, ships, bags and other industries. Jingke industry can be produced.
Question 6: What is foaming material? Foam material is a kind of foam. Shanghai Jink Industrial Co., Ltd. provides a variety of PE foam products, the company was founded in 2002, Shanghai, China. The company now has more than 235 employees, annual sales figure of more than 50 million U.S. dollars, currently 60% of our products are sold to all over the world.
Question 7: What kind of material does insulation foam belong to It belongs to polyurethane foam. It is the product of the cross-combination of aerosol technology and polyurethane foam technology, when the material is sprayed from the aerosol cans, the foamy polyurethane material will rapidly expand and react with the air or contact with the moisture in the matrix to form a curing foam. The cured foam has a variety of effects such as caulking, bonding, sealing, heat insulation, sound absorption, etc. It is an environmentally friendly, energy-saving and easy to use building materials, which can be used for sealing and plugging leaks, filling the gap and fixing and bonding, heat insulation and sound insulation.
Question eight: home improvement in the installation of marble window sill in the end with what material paste better, with styrofoam can? Can not use styrofoam. Generally use professional marble mica gel.
Marble masonry adhesive based on unsaturated polyester resin, suitable for all types of stone bonding or repair of cracks and breaks on the surface of the stone, commonly used in various types of paving projects and all types of stone repair, bonding positioning and caulking.
Foam rubber as the name suggests is a foaming characteristics and bonding characteristics of Gong, it is mainly used for building doors and windows side seams, expansion joints and holes in the components of the filling, sealing, bonding. Is relying on moisture curing polyurethane elastic sealing foam material. Foaming gel is composed of polyurethane prepolymer foaming agent catalyst, cross-linking agent, etc. filled into high-pressure-resistant iron cans and filled with propane and other gases. It is divided into gun type and tube type two kinds, gun type is need special polyurethane foaming gun to use, tube type equipped with disposable hose.
Question 9: What is the material of the site packaging foamer is usually AB two raw materials for the chemical reaction, to generate a semi-hard bubble of polyurethane, density adjustable, with a good factory punch effect. You can ask the more professional manufacturers / Xiamen standard Chinese science and technology website or customer service.
Question 10: What is a foaming agent? A substance that produces a bubble structure in the polymer matrix is defined as a blowing agent. In other words, the gas phase in most polymer foams is produced by the blowing agent used in the foam processing.
Blowing agents include gases that expand when pressure is released and liquids that create vesicles when they become gaseous and chemicals that decompose or react in the presence of heat or catalysts to produce gases.
The blowing agent plays an important role in the processing and performance of the foam. The blowing agent is the decisive factor in controlling the density of the foam. In addition to density, it also affects the microstructure and morphology of the foam pores, which determines the end-use properties of the product.
In some applications, such as insulation foams, the performance of the blowing agent plays a key role in the long-term serviceability of the foam. In these and many other foam products, the foam is closed cell and the blowing agent remains in the foam's pore structure until it diffuses out, which in some cases can take decades. In many: other applications, such as packaging and cushioning materials, the special pore structure allows the blowing agent to escape as soon as the foam is molded.
This type of foam is referred to as open-cell foam, and although the characteristics of this blister structure and morphology due to the action of the blowing agent can have an effect on the properties of the foam, the blowing agent itself has no effect on the properties of the foam. There are of course many applications, such as floating, impact and load-bearing foams, where the blowing agent acts as a mediator.
In foam processing, the choice of blowing agent and processing conditions/steps are interrelated. For foam molding of high molecular weight polymers such as polystyrene (PS), polyolefins, polyamides, and polycool, the blowing agent alters the melt viscosity and the thermal history of the polymer, which in turn alters the rheological properties of the foam as it is molded and set.
For polymerization, foaming and molding at the same time, such as polyurethane (PU) epoxy resin or phenolic foam body foam molding, the blowing agent will not only affect the viscosity of the liquid and the thermal history, but also affects the compatibility between the group}, the degree of reaction and mixing degree.
Because the role of the blowing agent is slightly different in these two cases, we call the first case, i.e., the foaming of high molecular weight polymers, thermoplastic foaming, and the other, such as polyurethane foaming, thermosetting plastic foaming. Undoubtedly, for any polymer blowing agent there are a lot of ****, but for a particular place in a particular polymer for a particular purpose, its blowing agent also need to have many special requirements.
Carbon dioxide (C02), generated by the reaction of isocyanate (or ester)-water, was the main blowing agent for poly(nitrogen ester) foams in the early days, while low-boiling liquids such as chloromethane or butene were the main blowing agents for thermoplastic foams such as PS.
Over the years, many polymer foams have become increasingly commercially available, each with its own unique properties and processing requirements, which have led to corresponding developments in blowing agent technology. Many different blowing agents and their various mixtures are currently in use.
Blowing agents are usually categorized into physical and chemical blowing agents. Chemical blowing agents are usually liquids or gases at standard temperature and pressure (STP), and undergo a reversible change of state or expansion process when foamed. One exception to this classification is water, which reacts with isocyanates (or esters) to release C02 gas, and is widely used in the manufacture of polyurethane foam.
① Physical blowing agents are aliphatic hydrocarbons, such as pentane and heptane.
② chemical blowing agent and inorganic and organic points.
Organic class has azodicarbonamide (AC), azobisbutyronitrile (ABN), azobis: diisopropyl carbonate (DIPA), di-nitroso-pentamethylene tetramethylene amine (also known as H foaming agent, or DPT foaming agent, or BN foaming agent), p-toluene sulfonyl hydrazide (TSH), di-Sulfonyl hydrazide diphenyl ether (OBSH), etc., the added amount of o.i% - s%. Also add foaming additives and so on.