Development of laser plastic marking technology (II)
formula for lasers if the correct additive formula is used, foba's bone said that almost any kind of plastic can be marked by any type of laser machine. The supplier of the formula or masterbatch needs to know the resin, the final application, and the type of icon required. For example, some plastics such as high-density polyethylene and polycarbonate can be printed well with YAG laser without any additives in some colors. On the other hand, the carbon dioxide laser machine cannot print these two kinds of plastics well without special additives
the limitation of the existing technology is that the ability to obtain color adjusted laser marking is limited, and the cost of laser optimized plastic is also higher than 10% - 15% of the market price, sometimes higher
clariant group masterbatch through a fair process, bill Blasius, director of simulation and amplification technology development department, admitted that laser marking is limited in pigment selection and color transparency. He said, "we know more about how to use pigments and additives than we did a thousand years ago. We hope to make full use of chemical reactions when using laser lamps, which occur between special resins and some additives and pigments." Due to the development of compounding technology, we can get near flat white marks on black or blue acetaldehyde copolymers, or pure white marks on black ABS. With special formula and laser parameters, we can even get the adjusted color. "In this way, the etched laser marking can be adjusted to Pantone, Munsell or other industrial standards. The pigment in the resin determines the color and hue, while the laser determines the intensity or concentration," schlather explained Many laser marking color/licking additives are based on surface treated mica, such as the popular afflair and laser flair formulations formulated by EM industries. However, other additives such as copper and antimony are also used in patented formulations
"although there are many existing laser light sources for decorative plastics, sealed carbon dioxide lasers are the most widely used at present, followed by solid-state nd:yag lasers pumped by tubes and nd:yag devices pumped by diodes in recent years."
companies that produce plastic that can be used for dry laser marking include BASF, Bayer, Ticona and RTP. The main suppliers of special pigments and additives masterbatches for laser marking are Clariant and PolyOne
first of all, focus on automotive parts. Ticona introduced two kinds of laser marking black acetaldehyde copolymers, Celcon LM90 and lm90z. LM90 is used to print engine hood and fuel equipment components, and lh90z is UV stabilized for interior trim, such as speaker grille and release rod. Tommiller's automobile marketing manager said that the additives of patented technology are most suitable for nd:yag laser machines
ticona's latest research product is Celcon uvl40lg, which is said to be the earliest snake acetaldehyde copolymer for low gloss laser marking. It also has anti ultraviolet effect. Ticona also provides laser marking of smooth, glass fiber filled and mineral purplish glass fiber filled celanex PBT for marking of automobiles, electrical/electronic components that do not require aesthetics. V6ndar PBT, which can be laser marked based on mixtures and alloys, is designated as the internal component of the automobile inner tube. The new laser marking Celanese nylon 66 is also being evaluated for the application of automotive interior components. According to Ticona's Miller, most auto parts require a black substrate with a white mark on it. " Not only the density of special black should be compared with the specifications of casting 0EM for shafts with complex shapes (such as camshaft and crankshaft), but also self colored ones. The concentration of white obtained depends mainly on the additional packaging. "
laser etching, more accurately, paint engraving has been applied to day/night reflective elements since the mid-1980s, such as fluorescent screens, buttons and switches for car stereo surround control, and mirror shells. Some components are particularly transparent polycarbonate or ABS, which are first painted white and then painted black. Use a laser machine to etch black. When the workpiece is reflective, white will be exposed. Ticona's Miller said, "with creative product design and manufacturing technologies (such as two-component molding), it is possible to eliminate these two processes." "The carbon dioxide laser machine etches the plastic surface and cleans the material by evaporation. The result is a contrast mark, but there is little or no real color change."
rtp supplies several smooth reinforced plastic compound ingredients that can be laser marked. These plastics are PP, nylon (6, 66, 12, 11612), ABS, LLDPE, acetaldehyde copolymer, thermoplastic polyurethane, polybutylene terephthalate, syndiotactic polystyrene, polysulfone, PPS, TPO, acrylic acid, pc/acrylic acid, pc/abs, LPC. Stuartswain, manager of the pigment department, said, "there is a huge business opportunity to print different colors into white, yellow and green on a black background."
the research of BASF laser marking laboratory in Germany shows that the addition of glass fiber only slightly weakens the printing performance of plastics, but some fillers, flame retardants and regrinding debris can greatly weaken the printing performance. The resins produced by BASF that can be used for laser marking include black pigments of terluran ABS, ultraformacetai, Luran s ASA, Ultramid nylon, Luran San and ultradur PBT
German Bayer is also doing similar work. The company provides polycarbonate, ABS and PBT that can be used for laser marking
most of Clariant's laser marking masterbatches are customized. We have our own base of laser marking powder, both mica base material formula and patented additive formula. We hope to use these formulas to produce special masterbatch). At present, the pigment effect that Clariant can achieve is to realize the gradient from white to gray to black on the substrate of any pigment. Clariant can provide blue, red or green marks on very black substrates. Blasius expects to achieve a wider range of colors in the next few yearsDavid Bates, marketing manager of fastmark of PolyOne group, said that the new masterbatch of their company is suitable for making pure black marks with high contrast on white substrates and pure white marks on black substrates. PolyOne also provides masterbatch, which can provide printing marks of any color (usually on black parts). The company combines various special colorants with additives for laser marking to create greater possibilities, such as printing shiny labels on naturally colored containers. These new formulas present great business opportunities -- polyolefin shampoo and thermostat bottles and caps are as effective as toys in some high-end San cosmetics packaging materials. PolyOne has developed fastmar additives for polyolefins, polycarbonates, pc/abs, and sans that are both smooth and can be used in glass fiber or mineral filled plastic pelletizer operations in a wide range of fields
several other companies have also provided laser marking formulas on a low-key basis, including ferro group, Jiu Schulman and LNP engineering plastics. Schulman manufactures laser marking compound and polybatch masterbatch for car cabin. LNP provides laser marked starflame retardant nylon type compound ingredients for electrical parts, stat Kon formula of polyphenylene sulfide for medical containers, ABS, PC and acetaldehyde formula for surgery
marking of plastic products in China - the prospect of laser marking
many final plastic products, such as office machine shells and accessories such as computers, electrical appliance shells and accessories, various electrical connectors, automotive interior parts, need to be marked with product trademarks, specifications, materials used, manufacturers, manufacturing dates, expiration dates, etc., and some plastic pipes also need to be marked with molding machine models, etc. Some of these are to meet the requirements of commercial activities, and some are mandatory requirements of quality assurance regulations. There are many marking methods for plastic products, such as direct molding (i.e. directly engraving on the injection molding mold), embossing, hot embossing, inkjet, laser, etc. Either method requires clear, firm and durable marks, which will not disappear under the action of mechanical, chemical and physical factors
due to economic reasons, the methods of direct molding, embossing and hot embossing are widely used in China at present. Inkjet printing has increased (especially in pipe production lines), and laser marking methods are rare. Laser marking method has the advantages of no ink and solvent, good environmental adaptability, flexible control of marking shape through computer, and high marking data density. Its application range is expanding, especially in automotive interior parts. However, the laser marking method also has shortcomings. In order to clearly mark plastic with laser, the material needs to be properly modified with special additives
with the expansion of the application scope of laser marking methods and the maturity of technology, the cost is declining. China is a large country in the production and application of plastic products. According to the statistics of enterprises with an output value of more than 5 million yuan in 2001, the production of plastic products reached 11853 KT, while the apparent consumption calculated according to the resin production and import and export volume reached about 25000 KT (estimated value). A large number of plastic products need to be marked. As a new generation of marking method, laser marking method has broad development prospects in China's plastic products industry
source: plastic industry