Case 5 UV drying James River is a manufacturer and operator of consumer packaging, food and consumer packaging and office documents. Their production line includes signing various products, such as toilet paper in the north, Braney towels, Pixie cup trays, newspapers in the Montery magazine and Quilt-Rap sandwich wrap, etc. In 1990 it had sales of US$540 million. Since 1975, James River began using infrared ink. By the mid-1980s, UV-drying inks had formed a more mature process in the processing of paper products. They integrated the multi-step process into one step. The advantage of this type of ink is fast drying and energy saving, but it is usually more expensive than traditional inks. Case 6 Flexible packaging Easthampton MA is a manufacturer of plastic extruded hoses and closures for the packaging of cosmetics, personal health products, and household chemicals. After 20 years of flexible packaging, UV inks and UV coatings have appeared. The first UV light appeared in the early 1970s. This UV system can reduce the emission of radiation, occupy a small area, save ink, and can achieve the desired specific color by blending the basic ink. . With the continuous development of UV coating machines and the development of UV drying hoses, they sold the first production line and used UV dryers to dry the inks and coatings. An interlocking UV drying device is then designed and manufactured. The hose can be printed on a machine, glued and capped. Therefore, the need for a hose transfer mechanism is reduced. Ultraviolet drying inks have new requirements for color matching, surface abrasion resistance performance, elasticity and non-discoloring properties. Using UV drying saves space and energy: Its footprint is one-third that of other drying devices. Other heating and drying devices take 40 minutes to complete a flexible package, and this high-speed linked UV drying device takes only 5 minutes. UV inks and coatings without solvents have greatly improved the working environment. Although the company did not estimate how much money was saved, they thought it was the UV system that effectively promoted the development of the industry and helped them to produce at a low cost. Makes the company the largest supplier of plastic extrusion flexible packaging. Case 7 How to find and solve problems when converting to water-based inks Experiments were conducted at different printing speeds, cleaning roller plates, substrate materials, and ink additives to select the best conditions. Printing speed: We conducted experiments on coated paper and non-coated paper respectively, and used a speed of 400 to 500 sheets per minute when using solvent-based inks. It was found that the circulation of air is very important for the drying of water-based inks. Heat is no longer important. Cleaning Plate Rollers: Water-based inks require gentle solution cleaning. In order to avoid contamination of the ink when using this solution, a common cleaning drum pool is required. It is installed in the center of the pressroom and is capable of containing ink fountains, ink trays, and pumps. After the work is completed, the ink slowly flows back to the ink tank, and the ink remaining on the ink tray, the ink fountain and the pump is repeatedly washed by the solution in the washing tank (about 3 minutes). The disposable wash is very good because it saves cleaning time. Tools: Water-based inks require a viscometer and pH meter to determine ink quality. Ink control: Requires constant replenishment and guarantees PH value. Ink Additives: Solvents, fast drying reductants, printing cleaning additives, glycols, ammonia, fillers, and color additives are all necessary to improve print quality. Computer Inking: For Labdl America, this is a fruitful improvement. It will earn several times the cost in one year, reduce the purchase of raw materials, just buy a few basic color ink. It can also tint small batches of ink, reducing the ink time to 3 to 4 minutes. In addition, ink inventory is effectively reduced. Water-based inks are good for the environment and human health (both anti-inflammatory and solvent-volatile problems are handled well). Inventory is reduced by half and sales are doubled. Safety, cost reduction, color density, and fading improve. Case 8 Innovation Lawrence Paper decided to use a new, efficient squeegee system to improve the printing process. The original open system consumed a lot of ink and caused serious pollution. The new system saves ink and improves printing quality. The squeegee has more options. The squeegee pressure can be set and adjusted automatically. The laser-engraved mesh roller replaces the traditional mechanical engraving roller. The new system has the following advantages: The system requires 30 to 40 lbs for each ink change, and the new system requires only 8 lbs; the new system reduces the amount of ink used and stored; the replacement of the scraper in the new system takes 20 minutes, while the old system requires It takes an hour; the new system is detachable and easy to repair. Printing water can be recycled 100%. Case 9 Reduction of waste generated in the production of goods racks and labels More than 400 employees The manufacturers of printed polystyrene packaging labels and high-density polystyrene goods racks printed 800 million trademarks and 250 million goods shelves each year. There are many wastes generated during this process: volatile emissions (which leak out of the Freo-227M during the polystyrene extrusion process and come from polystyrene). Wastewater from photographic processes, plate cleaning waste (butanol, perchlorate solvent blends), liquids and volatile substances, waste and old versions, solvent-based inks; printing machine cleaning solvents (liquid and gas emissions (Replacement) waste product produced during the thermoforming or die-cutting process of a defective product. Solvents can be recovered through two large evaporation units, re-used in the ink tray, and all of the waste left over from the squeeze can be reused. The scraped ink and the excess ink can be reused; the ink can be changed from bright to dark in the printing plate, and the washing roller solvent can also be recovered.