What is acrylic? Is it poisonous?

Advertising light boxes and telephone booths appear in large numbers, and a considerable part of the materials used are plexiglass acrylic materials.

Among sanitary ware, plexiglass acrylic bathtub has been widely used in recent years because of its luxurious appearance, deep texture, easy cleaning, high strength, light weight and comfortable use. At present, the annual output of plexiglass acrylic bathtubs in China is about 6.5438+0.5 million, and the annual consumption of PMMA extruded board or pouring board is more than 5,000 tons.

With the improvement of China's building regulations, PMMA will show strong competitiveness in more application fields.

In addition, special plexiglass, such as optical plexiglass, radiation-proof plexiglass and CD-grade plexiglass, is still blank in China's construction industry and has great room for development.

2. Production and market status of acrylic PMMA in China. At present, the total production capacity of plexiglass products in China is about 6.5438+0.3 million tons/day. There are many manufacturers, but the production scale is small.

Domestic acrylic plexiglass production and processing capacity is great, but the product structure is not reasonable, and it can only produce ordinary products, lacking high value-added products needed by the construction industry, and can not meet the market demand in variety and quality. For example, extruded boards with large demand for construction need to be imported in large quantities from abroad.

In recent years, the consumption of acrylic plexiglass in China has increased rapidly. However, due to the monotonous variety, small quantity and poor quality of PMMA products in China, it is far from meeting the needs of the domestic market, resulting in a substantial increase in imports year by year. In 2000, China imported 77,000 tons of PMMA molding compound and nearly 4,000 tons of plexiglass. From the perspective of import areas, the total import volume of Guangdong, Shanghai, Zhejiang and Jiangsu provinces accounts for about 95% of the total import volume of the country. Jiangsu and Shanghai are the main producing areas of plexiglass casting plates in China. Because of the simple casting process and low investment, many township enterprises use this process for workshop production. The equipment scale is small, and the product quality is far from the quality standard of building materials industry that has long been eliminated abroad.

In 1980s, the annual sales volume of acrylic plexiglass in China was less than 20,000 tons, and the consumer market was not dominated by the construction industry. Since the 1990s, the market application of PMMA in the construction industry has developed greatly, and its consumption has increased rapidly, reaching 85,000 tons in 2000, including 29,000 tons of pouring plate, 25,000 tons of extrusion plate and 3 1 10,000 tons of molding compound (excluding molding compound for extrusion plate). It is predicted that in the next few years, the development speed of the domestic acrylic plexiglass market will remain above 6% per year. It is estimated that by 2005, the market capacity of acrylic plexiglass in China will be 1 10000 tons, of which the construction industry will account for about 60% ~ 70%.

As early as the 1920s, Rohm and Hahn first invented the method of polymerizing MMA into acrylic sheets, which was called "oroglas/plexiglas". However, the company failed to find a more economical process route to produce MMA, so acrylic board (acrylic board) was not popular at that time.

193 1 year, scientists from ICI company invented the acetone cyanohydrin method to produce MMA, which greatly reduced the cost of MMA and popularized acrylic boards. At the same time, ICI company also successfully developed acrylic board (acrylic board) for fighter cockpit roof and other fields, and then ICI company built the world's largest acrylic board factory in Britain.

Acrylic board and plexiglass

Plexiglass comes from the brand name "oroglas", which means "plexiglass". As mentioned earlier, oroglas is actually a PMMA board, which is also an acrylic board. Some people in China think that transparent plastic is plexiglass. In order to avoid confusion and misunderstanding, most PMMA plates are now called acrylic plates, while all kinds of PMMA materials are generally called acrylic plates.

Types of plexiglass acrylic

Acrylic board (acrylic board): According to the polymerization process, it can be divided into cast board and extruded board, among which water-cast board has higher molecular weight, stronger rigidity and better crack resistance, which is more suitable for processing large-size signs. In addition, the casting process is more suitable for producing small batches of plates with different colors. However, the extruded board has low molecular weight and high flexibility, which is suitable for vacuum suction molding. Extrusion process can better control the thickness of plate, and mass production of monochrome plate is more economical.

Acrylic board (acrylic board) can be divided into pure transparent board, color transparent board and translucent board (such as color board) according to light transmittance; According to the surface gloss, it can be divided into high-gloss board, mercerized board and matte board (also called sanding board); According to the performance, acrylic board can also be other common boards, impact-resistant boards, ultraviolet boards, smoldering boards and high wear-resistant boards.

Acrylic properties of plexiglass

Plexiglass: It has the transparency of crystal, and the light transmittance is above 92%. Acrylic fiber dyed with dyes has good color rendering effect. In addition, acrylic board has excellent weather resistance, high surface hardness, good luster and high temperature performance. Acrylic board has good processability, which can be thermoformed (including molding, blow molding and vacuum suction) or machined, such as drilling, turning and cutting. Computer-controlled mechanical cutting and engraving not only greatly improves the machining accuracy, but also can produce patterns and shapes that traditional methods can't complete. In addition, the acrylic board can use laser cutting and laser engraving to produce products with peculiar effects.

Transparent acrylic board is as transparent as glass, but its density is only half that of glass. In addition, it is not as fragile as glass, and even if it is destroyed, it will not form sharp fragments like glass. The wear resistance of acrylic plate is close to that of aluminum, and it is resistant to corrosion from time to time by various chemicals. Acrylic board has good printability and sprayability. Through proper printing (such as screen printing) and spraying technology, acrylic products (acrylic products) can be endowed with ideal surface decoration effect.

Specially modified acrylic board can absorb a lot of ultraviolet rays. In addition, smoldering acrylic can help overcome fire hazards in specific places. The impact strength of high punching acrylic is 6 to 10 times that of acrylic, and the ultra-wear-resistant acrylic plate with special surface treatment can withstand extremely severe tests.

The above reasons of acrylic board make it widely used in aviation, automobile, electronics, medical treatment, chemical industry, building materials, bathroom, advertising signs and other fields. Widely used in the manufacture of various acrylic products, plexiglass display racks (such as cosmetics display racks, mobile phone display racks, watch display racks, glasses display racks), tags, gift boxes, display racks, signs, sign racks, acrylic key chains, jewelry boxes, jewelry boxes, color boxes, transparent boxes, acrylic light boxes, furniture accessories, agency cards, and acrylic water cluster boxes.

Plexiglass acrylic boards and advertising signs

Whether multinational companies or small shops, factories or offices want to set up a signboard in the world, they need a durable, eye-catching, unique and economical signboard. The excellent comprehensive performance of plexiglass acrylic board can fully meet the above requirements. The acrylic light box is light-transmitting, soft and bright, not only eye-catching, but also energy-saving. The luster of acrylic itself makes the acrylic light box sign stand out in the daytime without lights, and it is easy to process. By choosing a suitable variety of processing methods, various light boxes or signs can be made. Acrylic light box is durable and can be guaranteed for more than ten years outdoors, and it is also very convenient to install, repair and maintain. The cleaning method of acrylic light box sign is simple: scrub it with soap and soft cloth. But coarse cloth or hard brush is not allowed, which is harmful to plexiglass.

You may have noticed that McDonald's restaurants all over the world use plexiglass acrylic signs with uniform color and shape. BP also chose plexiglass as its signboard. Marks & Spencer, a famous department store chain, also installed eye-catching signs in more than 400 stores around the world using acrylic plexiglass plates with different light transmittance.

Introduce fully transparent chassis and colorful chassis.

Materials of fully transparent chassis and colorful chassis. Whether it is a colorful shell or a fully transparent shell, its material is plexiglass plate, that is, acrylic plate. There are fully transparent plexiglass, blue plexiglass and yellow plexiglass commonly used to make this kind of chassis board.

The use of colorful chassis and fully transparent chassis. Whether it is a fully transparent chassis or a colorful chassis, it is actually a kind of computer chassis, which is used for computer assembly. It's just that the material of this chassis is different from the traditional chassis.

There are two problems that affect the development of colorful chassis and fully transparent chassis: one is the price problem. At present, the price of this computer case is higher than that of the traditional computer case. In fact, the cost of this kind of chassis is indeed higher than that of traditional computer chassis, which is also a helpless move. If you want to enjoy the colorful effect of chassis rotation, you can only spend more money. Of course, some businesses are speculating too much at present. As for the current market rumors that there are some ultra-low-priced colorful transparent chassis, this chassis is not really colorful transparent chassis. It is based on adding one or two transparent plates to the traditional computer case, which is not completely transparent, and the price is of course much lower.

The other is heat dissipation. As mentioned above, both colorful chassis and transparent chassis are made of plexiglass acrylic. Moreover, plexiglass is actually a kind of plastic, and the heat dissipation is really not very good. But it doesn't mean there is no solution. Our current solution is to open more exhaust holes and add more exhaust fans on the chassis. From the actual effect, the cooling effect is good, please rest assured.

What are the advantages of acrylic bathtub?

The official name of acrylic bathtub is FRP bathtub (acrylic is the homonym of English). Its surface material is methyl propyl methyl ester, the reverse side is coated with glass fiber and reinforced with special resin. The whole bathtub should be uniform in color, smooth in surface and free from delamination and bubbles. The thickness of the surface layer is generally above 3 mm, which is firmly combined with glass fiber and does not peel off.

Acrylic bathtub has slow heat transfer, so it has good thermal insulation and no "cold" feeling on the contact surface. Compared with cast iron or steel bathtub, it has a "warm and soft" feeling and will not harm the body. Because acrylic has good reprocessability, it is the only one who makes luxury jacuzzi.

When installing acrylic bathtub, the bottom should be paved with yellow sand cement slurry, and it should not be hollowed out or supported by only a few points to avoid damage. When in use, it is necessary to prevent sharp and hard objects from bumping and rubbing. When cleaning, gently wipe it with a soft cloth and detergent, not a scouring pad. Once the hair is found to be rubbed, wipe it with a soft cloth and toothpaste to restore luster.

Transparent furniture has always provided a variety of personality choices for petty bourgeoisie who love avant-garde in a non-mainstream way of existence. However, several incidents of glass furniture bursting last year made people yearn for transparent furniture but still have a lingering fear. "Fragility" has become synonymous with transparent furniture. How can we be assured and transparent? Look at how the alternative transparent furniture that has been quietly selling in the market recently is trying to come to us!

Acrylic acid is a by-product extracted from deep-sea oil. In fact, if you decompress the acrylic material carefully, you will find that it is not so magical. It is also a kind of plexiglass, and the common transparent mobile phone display frame is made of it.

Although it is also a kind of glass, acrylic is not as "fragile" as glass, and its impact resistance is 200 times stronger than ordinary glass, and it will hardly break. Its bearing capacity changes with the change of thickness, and the thicker it is, the stronger it is. In the interview, the reporter found that an acrylic dining table is extremely transparent, which changed the usual glass furniture to choose stainless steel and other materials with good load-bearing performance at the support point, and used acrylic from head to toe, which shows that its load-bearing capacity is unusual. Acrylic has a hard side, but it is also flexible. Very suitable for modeling, corner radian can be achieved through technology. Its thermal insulation performance is also better than that of glass, unlike glass, which is "cold to the end", but it also leads to its poor heat dissipation ability. This material is most afraid of sharp scratches, but such scratches are also easy to repair, and ordinary white toothpaste can wipe them.

Distinguish:

1. feel: high-quality acrylic material, smooth and smooth, no sweat stains, no fingerprints.

2. Thickness: Thickness is a hard standard for the bearing range of acrylic, and 8 ~ 12 cm is a common thickness.

3. Uniformity: Whether the color is uniform is also one of the criteria for judging the quality of acrylic.

4. Hardware: Hardware with good quality and beautiful appearance is very important for transparent furniture. Inferior hardware is easy to cause difficulties, rust and inflexibility in long-term use.

How to identify acrylic board of sanitary ware

At present, a new acrylic bathtub is popular in China, which is gradually recognized by consumers. There are three kinds of acrylic plates in the domestic market: special acrylic plates for bathroom, ordinary acrylic plates and ABS acrylic composite plates. The latter two kinds of plates are not suitable for making bathtubs, tubs and other sanitary wares due to their own defects.

The chemical name of acrylic is methyl methacrylate, which is "plexiglass". Acrylic plate for sanitary ware has excellent surface finish, wear resistance equivalent to that of aluminum, and is not easy to scratch and clean. If the surface is accidentally scratched, it can be repaired and removed quickly and conveniently by using polishing agent. Because the plate itself has a certain elasticity, it is not easy to crack and break even if the surface is hit to a certain extent. In addition, the acrylic board for sanitary ware also has strong corrosion resistance and light transmittance, and because the pigment can be dissolved in the board, its color is very stable, and it is not easy to fade after long-term sun and rain. Therefore, the special acrylic board for sanitary ware is widely used in other industries besides indoor and outdoor decoration.

Ordinary acrylic board is easy to crack, break and deform due to its low hardness, poor heat resistance and low ductility, and its color is unstable, so it is easy to fluff during use. Generally, the bathtub formed by it is easy to change color because of the large stretch at the bottom, and usually there are discoloration phenomena such as "whitening" and "yellowing" at the corner at the bottom.

ABS acrylic composite board is made of ABS board and acrylic composite board by double-sided bonding. Therefore, it is easy to observe at the flanging cut (that is, the edge) of sanitary ware. Because ABS acrylic composite board is made of two different materials, the shrinkage rate is inconsistent, and it is easy to delaminate after long-term cold and hot changes. Thirdly, because the surface of ABS plate is only a few tenths of a millimeter thick, its stability and wear resistance are poor, and it is easy to produce "whitening" or other discoloration during molding.

Acrylic velvet balls are very suitable for holiday supplies, gifts, hair accessories, handicrafts, ready-made hat accessories and material packages, and there are many colors to choose from. Acrylic balls have passed the European safety standard (EN7 1Part3) and are very suitable for export.