Inkjet paper which is good Ink-jet RC paper, support body for RC paper base, multi-functional coating, including ink absorption layer, solid ink layer and protective layer.Avoid ink ink paper, color does not string color, better image quality.In Japan, Europe and the United States, penrun and cast-coating technology has been eliminated, the market for high gloss paper, almost all are micropass, in addition to printer manufacturers HP, EPSON, CANON, and so on, there are corocca, prince, mitsubishi and many OEM manufacturers.High speed and high precision photo printer + high color VAT pigment ink + high light and waterproof gap type photo paper, achieve a perfect matching effect, to the traditional silver halide photo paper launched a strong challenge. Notes for use of ink-jet paper 1, ink box and photo printing paper must be used in the same package. 2. The glossy side of the photographic printing paper is the printing surface, and the printing side must be put into the paper box.If you put wrong, you can't print the image. 3. Do not touch the picture printing, or the fingerprints left on the surface of the printed sheet will produce a bad effect. 4, if the ink film of the ink box is loose, please follow the direction of the arrow to tighten the film before loading and using. 5. After using the word processor to print the words, do not contact them immediately, or it will easily cause stains and leakage. Notes for ink-jet printing 1, with adhesive tape or PVC made of the table mat or business card case, plastic materials such as erasers do not contact the photo printing surface directly, because the chemical action will occur color change and

1. Design indicatorsThe design indexes of heat exchanger include working fluid type and its flow rate, inlet and outlet temperature, working pressure and heat exchanger efficiency.Heat exchangers for aerospace equipment should also include the allowable pressure drop, size and mass.1. Design indicatorsThe design indexes of heat exchanger include working fluid type and its flow rate, inlet and outlet temperature, working pressure and heat exchanger efficiency.Heat exchangers for aerospace equipment should also include the allowable pressure drop, size and mass. 2. General layout.The general arrangement of the heat exchanger should first select the type and structure of the heat exchanger, the form of fluid flow and the materials used, and then select the type of heat transfer surface.Consider operating temperature, pressure, etc. 3. Thermal design.The thermal design of heat exchanger includes heat transfer calculation, flow resistance calculation and determination of size.Thermal design in addition to the technical performance indicators, also need to have on the surface of the heat transfer characteristics (including heat transfer characteristics and flow resistance characteristics and structural parameters) and thermal physical property parameters of fluid and material, can speak optimization techniques used in the design of the heat exchanger, according to the design goal, for the selected forms of heat exchanger and heat transfer surface, through the different Angle optimization analysis, offer several alternatives. 4.Structural design.The mechanism design of heat exchanger includes the following contents: (1) determine the material and size of each part according to the working temperature and

Expansion and expansion is the main form of connection between copper heat exchanger and steel tube plate in the process of heat exchanger manufacturing.The quality of expansion port is related to radial clearance, surface roughness and expansion rate of heat exchange tube and tube plate.In order to obtain a good and stable expansion joint quality, it is necessary to strictly control the machining accuracy of the tube plate, correctly select the tube expander, tube expansion power and control means, to ensure the proper expansion degree and take a reasonable expansion sequence.Nevertheless, leakage and leakage problems still occur frequently during pressure tests and require further repair.In addition, similar problems will occur in the operating cycle of the equipment, which will bring certain troubles to users and manufacturers.Steel tube plate connected to the copper heat exchange tube expanding new craft glue, glue easily by the new technology of application effect in view of the steel tube heat exchanger tube plate connected to the copper heat exchange tube leakage and the leakage problems, often appear when manufacturers in producing this kind of heat exchanger, a heat exchanger, from the perspective of the connector type, using the rubber easily pick up the new process.The new technology has been continuously improved through many simulated process tests and pressure tests, and finally successfully applied in the production process of connecting steel tube plate and copper heat exchange pipe of shell heat exchanger.After the quality tracking of this kind of heat exchanger equipment, there is no leakage and leakage quality problem during the operation period of the heat exchanger, so that the new process of rubber expansion has been recognized by the users.1) anneal the range of 200230mm at both ends of the copper tube for about 600 hours, and hold it for 1015min. After taking it out, wrap it with asbesto

After we have used the heat exchanger for a long time, we need to replace some parts, gasket is one of them, the following is to introduce the specific replacement order.This should be done in the following order 1. Remove the waste gasket of the heat exchanger. Please note that there shall be no scratches in the gasket groove during the disassembly. 2. Use acetone, butanone or other ketone solvent to remove residual glue in gasket tank. 3. Clean the gasket slots and gaskets with a clean cloth or cotton yarn. 4. Apply the adhesive evenly in the gasket groove. 5. Put clean new gaskets on the board.6. The heat exchanger plates affixed with gasket shall be placed in a flat, cool, ventilated place and naturally dry for 4h before installation and use. At present, heat exchanger is widely used and has a good prospect of development.That's all for today, I hope you can get some help, stay tuned and learn more. It is important to note that the specific replacement sequence may vary depending on the type and design of the heat exchanger. Always refer to the manufacturer's instructions and guidelines for the particular heat exchanger model being worked on.

How should plate heat exchanger maintain anticorrosion in application? The reason of the corrosion of the heat exchanger is known, the reasonable choice of anti-corrosion measures can achieve the purpose of efficient utilization of the equipment.In view of the corrosion situation, the following anticorrosion methods are proposed: corrosion inhibitor and electrochemical protection are mainly introduced here. 1. The corrosion inhibitor Chromate corrosion inhibitors are commonly used in cooling water systems. Chromate ion is an anodic (process) inhibitor. Chromate - zinc - polyphosphate: polyphosphates are used because of their ability to clean metal surfaces and resist corrosion. Polyphosphates can be partially converted into orthophosphates. They can also form large colloidal cations with calcium, inhibiting the cathode process.

Powder coating is a new technology in the field of modern coating industry, and it is also one of the new technologies mainly promoted in China.Powder coating is a coating method with high protection and high decoration. In order to get a satisfactory coating effect, it is necessary to control the factors influencing the coating effect.As the operation of powder coating construction personnel, if the coating process easy to produce the knowledge of the disease is not enough, will not be able to produce qualified products or a problem on hand, do not know how to start. ~Advantages of powder coating Powder coating is a kind of new coating material without liquid solvent and diluent. Because of its high decoration, heavy corrosion resistance, recyclable powder, no organic solvent pollution to the environment and other characteristics, it has a wide application space. Compared with traditional paint construction, powder paint construction has the following advantages: 1. Powder coating is a kind of solvent-free coating, which determines that it is not necessary to dissolve the main film-forming substances and auxiliary film-forming substances, fillers and pigments in organic solvents, and solves the problem that some polymer film-forming substances that cannot be dissolved in organic solvents can be used as coatings. However, many polymer materials that are difficult to be dissolved by solvent are the backbone of anticorrosive and decorative coatings. 2. Powder coating does not contain volatile organic solvents and is not easy to burn and explode. As long as dust is prevented from accumulating too much, the hidden danger of fire and explosion can be solved. Howev

Oil canvas is an important part of oil painting, it is a carrier of oil painting content, so the good or bad oil canvas will directly affect the effect of the whole oil painting printing, so how to identify oil canvas when buying oil painting in life, the following small make up together to see! Introduction to canvas Oil canvas is the coating base that prevents oil, solvent, water and so on to permeate on specific cloth base material, the cloth that USES to draw oil canvas kind, in addition, the coating cloth that USES to inkjet, photograph, indoor and outdoor advertisement and lamp box also is called oil canvas, how should that identify oil canvas, specific as follows.

PET universal film: with excellent strength, dimensional stability, cold resistance and chemical stability, it is widely used in composite packaging, photographic film, metal evaporation, audio and video recording and other substrates.Specifically, there are the following: 1. Semi-reinforced film.The main characteristic is the longitudinal tensile strength is large, in the larger tensile force is not easy to break, mainly used for the packaging of goods seal.The commonly used standard thickness is 20mm, 28mm, 30mm, 36mm, 50mm, etc. 2. Bronzing film.The main features are good tensile strength and transparency, stable thermal properties, and some resin binding force is low.Mainly suitable for small size change in high temperature processing or as a transfer carrier.The conventional standard thickness is 9 mm, 12 mm, 15 mm, 19 mm, 25 mm, 36 mm, etc. 3. Packaging: PET film is widely used for packaging applications due to its excellent clarity, strength, and barrier properties. It is commonly used for food packaging, pharmaceutical packaging, and consumer goods packaging. 4. Labels and Stickers: PET film is often used as a base material for labels and stickers. It provides a smooth surface for printing and can be easily die-cut into different shapes and sizes. 5. Laminating Film: PET film can be used as a laminating film to protect and enhance the appearance of printed materials such as posters, brochures, and photographs. It adds durability, gloss, and water resistance to the printed items.

In order to improve the surface properties of PET film, improve the printing adaptability and the bonding force of vacuum aluminum coating, corona treatment is usually used to improve the surface tension of the film.However, the corona method has some problems such as timeliness, especially in the environment of high temperature and high humidity, the film tension after corona treatment is easily attenuated.However, chemical coating law does not exist such a problem, so by the printing industry and aluminum plating favored.Some domestic enterprises have developed PET chemical coating series products: coating with water-soluble polymer can improve the surface tension of PET film;Coated with acrylate emulsion to improve the adaptability of printing (water-soluble ink can be used);Polyurethane aqueous solution coating can strengthen the bonding force of aluminized coating and PET base film, and increase the thickness of aluminized coating.In addition, the coating method can also be used to produce high barrier film and antistatic film. Anticorrosion Pigments, Inkjet Receptive Coating, Matting Agent

The color is colorful and diverse, coloring tools are also very much, for this many people are clear, not the same color, for the material workpiece is very important, powder coating production technology, additives are also very important. 1. Compatibility between powder coating additives and resin This is the choice of auxiliaries should be given priority attention to the problem, auxiliaries must be long-term stability in the powder coating, in order to play its due effectiveness.So the general use of additives to epoxy, polyester, acrylic and other resins have good compatibility.So powder coating additives are usually compared with resin compatibility, the method used is based on their structural similarity. For example, the choice of leveling agent is divided into a carrier, a carrier is not.If the carrier has e-12 as the carrier can not be used in the formulation of the pure polyester system.In addition, the commonly used B68 chemical matting agent is only suitable for epoxy systems, but for other systems, which will not only lose its due effect, but also bring negative effects to the coating film.

A lot of printing companies may have encountered such a thing: the actual size of the picture is not consistent with the planned size. It may be a little longer or a little shorter.If it is a single picture, the problem is not big, but if it is a splicing picture, it is more difficult, because the length of the splicing is not the same.Small make up here for you to introduce some picture Mosaic knowledge. First of all, the size of machine tension should be the same in the picture of jet painting splicing, because the tension is different, the step value will be different, it is recommended to open to the maximum, so that better control, error is relatively small. The second is to remember, the printing workshop and equipment heating plate temperature must be constant.If the temperature of the first picture is different from the temperature of the next picture, the size of the picture you spray out is definitely different, because the lamp box cloth changes with the temperature, its flexibility also changes, the higher the temperature, the bigger the picture error. Also, if your machine is typed picture than the original plan long or short (this value generally constant), such as every time is 1 m images of gush out is 1.01 m, so you can also do RIP or electronic file minus the (and) is added to the figures, so overflowing picture length should be no problem. In addition, now domestic small equipment generally do not have tension roller, cloth mainly by stepper motor, due to the small contact between the cloth roller and cloth, resulting in uneven cloth, which should also be worth noting. Finally, the fabric.Different cloth, its thickness, toughness and structure are different, so the tension, temperature, step value and so on

Once you have the film, you do a simple check of the medical film to see the quantity, fit, color, composition, and so on to meet the customer's needs. 1. The quantity of film meets the requirements: before using medical film, the quantity and requirements of film should be verified, usually including monochrome film, four-color film, spot color film and full-back film. 2. Whether there is any error in film binding: first, it is necessary to make sure that the quantity of film meets the requirements, and then check the medical film binding. Under normal conditions, one film with a large area of color is used as the benchmark on the plate board, and the other three films are covered.Words, lines, and pictures cannot have double shadows at the edges. 3. The color of each film needs to be identified: some films are colored with CMYK, while some medical films do not have color labels. Without color labels, the color blocks on the film can be identified by comparing with the color blocks on the colorful manuscripts, and marked with oil-based pens.If the film in question needs to be rearranged from the beginning, please pay attention to the difference between the second rearrangement and the first rearrangement. 4. Check whether the film scale meets the requirements: check the film scale according to the work order. When output the medical film, add all the center line, cover line and cutting line.If there is a sample, it should be done according to the product requirements;If there is no sample sheet, do according to the product scale requirements.In the process of doing, the relevant measures must be checked one by one.Handbag, envelope or medicine box and other informal size, but also to carefully check whether there is no adhesive, f

Light box cloth inkjet cloth, with the slow development of technology, has gradually developed into two categories.Ordinary light box cloth (commonly referred to as light box cloth) and reflective light box cloth (i.e. crystal lattice) Reflective inkjet cloth also known as crystal color lattice is a new type of direct inkjet, pictorial reflective advertising materials.This material features: I. super reflective strength: his reflective technology is based on the world's most advanced microlattice all-reflective reflective technology, with super reflective strength, and the typical reflective strength can reach 300cd/lx/m2. 2, can be directly inkjet: its surface for PVC polymer material, ink absorption, can be directly inkjet. 3, easy to use: the type of the substrate is mesh cloth and PVC adhesive, mesh cloth base has super tensile strength, can be used like ordinary mesh cloth, direct spray, direct taut installation;PVC adhesive type can be directly used in any smooth fabric paste. The main purpose Advertising printing and road traffic safety supplies. Advertising printing market is mainly used in: cross bridge billboard, lamppost flag, road column flag, site layout advertising, building construction frame advertising, optimus prime billboard, light box, advertising label, body advertising, tree screen advertising.Road traffic safety supplies market is mainly used in: temporary construction signs, road signs, anti-collision barrels, road cones, body reflective signs.

Silica is extremely important, one of the high-tech superfine inorganic new materials due to its small particle size, specific surface area is big, therefore the surface adsorption power, surface energy, high chemical purity, good dispersion performance, heat resistance, resistance has specific performance, with its excellent stability, reinforcing, thickening and thixotropic, and unique features in the field of the academic disciplines, having the effect that cannot replace.Silica commonly known as "ultra thin white carbon black", is widely used in various industries as additive, catalyst carrier, petrochemical industry, decoloring agent, matting agent, rubber reinforcing agent, plastic filling agent, ink thickener, soft metal polishing agent, insulation insulation filler, senior daily cosmetics packing and spraying materials, medicine, environmental protection and other fields.And provides the new material foundation and the technical guarantee for the related industry domain development.Due to its magnetic, catalytic, light absorption, thermal resistance and melting point compared with conventional materials show special functions, so people pay great attention to it. 1. Electronic packaging materials Organic electroluminescent devices (OELD) is the new development of a new type of plane display device, with opening and low driving voltage, dc voltage and can drive, can match the scale integrated circuit, easy to realize full color, high luminous intensity (> 105 CD/m2), and other advantages, but the servic

Inkjet printers are inexpensive and have good print quality. They are one of the most popular printers on the market in recent years and are widely used in the inkjet printing industry. Inkjet ink is one of the important elements of inkjet printing technology. At present, green printing has become the common consensus in the industry. The choice of environmentally friendly weak solvent ink as printing ink is of great significance for energy saving and environmental protection. Inkjet ink overview 1. Composition and classification of inkjet ink The composition and function of the inkjet ink are shown in Table 1. According to the type of coloring agent, inkjet ink is mainly divided into dye-based ink and pigment-based ink. The dye-based ink has bright color, soft color and fine particles, but the light fastness is poor, and it is easy to fade and deteriorate. The color of pigment ink is although Not as bright as dye-based inks, but its color fastness can be as long as six months or even a year. Inkjet inks are mainly classified into solvent-based inks, aqueous inks, and uncoated inks and weak solvent inks developed in recent years, depending on the solvent used. 2. The principle of action of weak solvent ink Low-solvent ink, also known as environmentally friendly solvent ink, has the English name ECO-solvent Ink, which is environmentally friendly, uncoated substrate and outdoor weather resistant. The principle of action is that the ink is transferred to the substrate through the nozzle of the micro-piezoelectric print head, wherein the solvent penetrates into the substrate, and as the solvent evaporates, the binder and the colorant in the ink are fixed on the surface

1. Suitable for short-term work, especially the launch or re-launch of new products; 2. Minimize the delivery time of the converter because it does not require a primer/coating; 3. Even on a transparent substrate, high-resolution pictures can be printed, and the use of primary colors, namely C, M, Y, K, and white, can still give results comparable to conventional printing; 4. Select special colors (such as gold, silver, etc.) to further enhance the printing effect. Guangzhou QUANXU Technology Co., LtdCo., Ltd. is a professional manufacturer of PET films with various functions, such as transparent PET film, milky white PET film, release PET film, PET film and so on. With a wide range of products, affordable prices, and environmentally-friendly technology, we are committed to providing customers with superior quality and service in the spirit of production excellence, honesty and trustworthiness, and warm and thoughtful service, and the spirit of helping our partners achieve their careers and achieve their own business. Welcome to consult! Anticorrosion Pigments, Inkjet Receptive Coating, Matting Age

Teflon is widely used as high temperature resistant and corrosion resistant in industries such as atomic energy, national defense, aerospace, electronics, electrical, chemical, machinery, instrumentation, instrumentation, construction, textile, metal surface treatment, pharmaceutical, medical, food, metallurgical smelting, etc. Materials, insulating materials, anti-stick coatings, etc., make it an irreplaceable product. Teflon coatings have outstanding excellent comprehensive properties and can be used as engineering plastics for PTFE tubes, rods, strips, plates, films, etc. Generally used in corrosion-resistant pipes, containers, pumps, valves, and radar, high-frequency communication equipment, radio equipment, etc. with high performance requirements. Adding any filler that can withstand the sintering temperature of polytetrafluoroethylene to polytetrafluoroethylene can greatly improve its mechanical properties. At the same time, maintaining other excellent properties of polytetrafluoroethylene. Filled varieties include glass fiber, metal, metal oxide, graphite, molybdenum disulfide, carbon fiber, polyimide, EKONOL, etc., wear resistance, limit PV value can be increased by 1000 times. Painting on the surface of the bullet warhead can increase the penetrability of the bullet, allowing the bullet to shoot through the bulletproof vest. Anticorrosion Pigments,

As a kind of powder coating, polyurethane powder coating has many excellent properties. Its coating film has high gloss, excellent decorative performance, strong abrasion resistance, good adhesion, and good weather resistance, corrosion resistance and electrical properties. And mechanical properties, it can be said that it takes into account the advantages of epoxy and acrylic powder coatings, and has a non-toxic advantage over pure polyester powder coatings. The powder coatings can take advantage of many applications in the industrial, agricultural, transportation and aerospace industries. First, the composition of polyurethane powder coating The polyurethane powder coating is prepared by mixing, melting, extruding and pulverizing a hydroxyl group-containing polyester resin and a blocked isocyanate curing agent as a base material, a leveling agent, a pigment filler and the like. The isocyanate in a closed state when the coating is baked is released and released for curing. Second, the composition and characteristics of polyurethane powder coatings The isocyanate can react with any active hydrogen-containing compound, in addition to the above-mentioned hydroxyl group to form a carbamate, it can also form an amide with a carboxyl group, and form an amine, urea, and a condensate with water, an amine, a urea, a carbamate, and an amine, respectively. Diurezoate and acyl urea. Third, the characteristics of polyurethane powder coating In addition to the general properties of conventional general-purpose powder coatings, polyurethane powder coatings have the following characteristics:

Teflon not only has many advantages of ordinary plastics, but also has outstanding performance of engineering plastics. It mainly shows: higher anti-friction performance and self-lubricating performance, stronger anti-extrusion ability and pressure resistance, better anti-UV Aging performance and more stable dimensional stability provide an optimal user experience. Teflon engineering plastics make wheels or rollers to fully exert the pressure resistance, self-lubricating and environmental protection properties of PEEK plastics. Higher than the pressure resistance of metal makes PEEK rollers more suitable for high pressure environment, self-lubricating can save lubricating oil. The maintenance process reduces the cost of use and avoids the risk of secondary pollution of the lubricant. Teflon has excellent insulating properties. Teflon has low dielectric constant and dielectric loss over a wide frequency range, and high breakdown voltage, insulation resistivity and arc resistance. Environmental and frequency effects, volume resistance up to 1018 ohm·cm, Teflon is widely used as insulation parts and wire insulation for excellent electrical insulation, and is also used in aerospace and other environments. The conditions are relatively bad. Due to its low dielectric constant, low dielectric loss and high electrical strength, Teflon's unique porous structure minimizes loss and distortion and allows signals to be transmitted at near-speed of light with thermal stability and mechanical flexibility. . At the same time, Teflon can also reduce the size and weight of the overall interconnection and is a good filling medium material. Therefore, it is also a very ideal high-frequency dielectric material. Teflon is used as the insulated RF cable, which can withstand the high temperature of 250 °C, so it can greatly improve the working

Precipitated silica is widely used in rubber industry as the best white reinforcing filler, in the white and light color filler reinforcing performance and surface activity is excellent, widely used in rubber sole, tire, rubber hose, rubber belt, cots, rubber seals and other products. In the process of producing rubber products, it is usually necessary to add carbon black into the rubber to improve the strength, abrasion resistance and aging resistance.The silica as reinforcing agent, in the ordinary rubber after adding a small amount of white carbon black, the product properties, such as strength, abrasion resistance and aging resistance are reaching or higher than traditional high-grade rubber products, and can produce novel, performance of a new generation of rubber products, such as white carbon black modified rubber materials, color and can keep unchanged for a long time.The bending resistance of the side glue of the color tire is improved from the original 100,000 times to more than 500,000 times and it is expected that the color of the tires of domestic cars and motorcycles will be realized in the near future.Carbon black can be added to PVC, epoxy resin, vinyl resin and other processable resin materials, can significantly improve the quality of products, facilitate processing molding, improve production efficiency, increase the variety, expand the scope of application.The transparency, strength, toughness and anti - aging property of PVC film were improved by adding silica.The hardness, roughness and anti - aging properties of plastic doors and Windows were greatly improved after adding a small amount of silica.Modified polypropylene plastic to make use of white carbon black, the main technical indicators (water absorption, insulation resistance, compression strength of residual deformation,

Can superfine silica be used in leather coatings? The so-called extinction, also known as matte light, is the physical uniformity and dispersion of small nano particles in the system, zinc stearate when the light after a period, by these small particles attack continuous reflection, the so-called total reflection, so that the light can not be emitted, so that the appearance looks dark, dull.The action of ultrafine silica depends on the slack strength to a large extent.Arrive good slack effect can choose the rotor must be slack or ball mo machine, three roller machine slack, ultrasonic slack equipment.Slack method and slack equipment selection depends on the consistency of the system.Sometimes it is advisable to use some liquid or some formula material to disperse all the ultrafine silica, and then join the rest of the liquid and other formula materials to adjust the ultrafine silica content to reach the formula requirement.In principle, silica is added with the reduction of the fundamental particle size. However, with the addition of particle fineness, higher shear force is required to reach its thickening effect . Leather finishing agent is polyurethane system, there are two kinds of high gloss (light) and matte, usually according to the light and matte according to a certain ratio of conditioning requirements of gloss, gas silica matte finishing agent to play the role of matte matte matte powder.Due to the serious proportion of the deposited mute powder, it simply presents the sedimentary appearance in the polyurethane system, and independently applies the matting powder ts-100 and tt-600 of degasse gas phase method or toyama fm-14 of Japan, etc. The matting effect can be applied and the deposition appearance can be processed, but the cost is high.At this time, Germany wacke N20 (hydrophilic, 200 square meters/

I believe we are very familiar with Fuced silica, in our daily life is very common, but in life there are some items containing Fuced silica you still do not know, the following will take you too late to take the Fuced silica application in life. 1, silicone rubber,Fuced silica reaction in silicone rubber, for general silicone rubber need ordinary ultra-fine can, for high quality silicone rubber need low iron (iron high product color yellow, red) products.Low iron products with high oil absorption and large specific surface area are the best choice, which can better react with silicone rubber raw materials. 2, for plastic, plastic products, it is best to need large specific surface area, high oil absorption value of the product, the best need to modify, so that the product wear-resistant, aging resistance, transparency, keep the pigment natural color. 3, hard rubber pad, Fuced silica needs low surface area, low oil absorption value. 4, toothpaste friction agent, also need low oil absorption than the surfa

Teflon's various profiles and parts, such as bars, tubes, films, bearings, gaskets, valves, etc., are widely used in machinery, chemical, aerospace, electrical and electronics, defense industry, cutting-edge technology, medical and electrical insulation, etc. field. Electrical insulation and chemical properties of teflon Teflon PTFE has good electrical insulation properties.It has very high resistivity, very low dielectric loss, and because teflon PTFE does not adsorb and absorb water vapor (it does not absorb water and is not infiltrated by water), the surface resistivity is very high even at 100% relative humidity.This property and its flashover resistance make teflon PTFE especially suitable for all kinds of situations requiring insulation.Teflon PTFE is chemically stable, better than any other elastomer.It does not react with all known acids and bases, including the three strong acids and hydrofluoric acids.Teflon PTFE is impervious to moisture and does not dissolve in any known solvent (but can dissolve in molten alkali metals).PTFE is non-flammable and non-toxic, releasing toxic gases only when heated at temperatures above 400 ° c.Due to the inactivity of teflon PTFE, it can only be bonded by special methods.Attention should be paid to the highest working temperature of the adhesive when bonding.Teflon PTFE can be used for high speed cutting with ordinary cutting tools.Different feeding materials (such as graphite, glass fiber, copper powder, etc.) are added in the sintering process of teflon PTFE to obtain modified teflon PTFE, mainly to improve its mechanical and thermal properties.In vacuum technology, teflon PTFE can be used as sealing gaskets, permanent or mobile seals for introduction devices, insulating elements and low-friction motion elements.The application

Water-based color paste and water-based coating are developed with the emergence of people's environmental protection needs.Compared with the traditional solvent - based and oil-based solvent - based coatings, the basic characteristics of water - based coatings lay its position in environmentally friendly coatings. The advantages and disadvantages of water-based color paste system and its process type are introduced below.There are two kinds of water-based color paste system: one is high pigment content without resin system;The other is a low pigment content resin (general resin or other single resin) system.Among them, the former pigment has high concentration, strong coloring power, good color performance, compatibility and fluidity, which generally does not cause floating color and hair flowers.The latter pigment concentration is relatively low, but has good coloring power, good color transmissibility, fluidity and viscosity is relatively stable, the system contains resin, compatibility needs to be tested otherwise easy to lead to paint floating color flower.In water-based printing ink and coating, water as solvent and solvent coating compared with organic solvent, water chemistry H ₂ O has a significantly different properties: a water than rich in organic solvent a lot;Water safety, no harm to the human body, no pollution to the environment.The volatile matter of sanshui is water vapor, which will neither increase VOC to produce harmful air pollutants, nor produce atmospheric reaction under the action of light and oxygen, causing secondary air pollution;Four water is non-combustible, unlike solvent - based color paste and solvent - based paint,