亚洲AV无码久久精|免费一区二区三区久久|国产精品精品国内自产拍|91偷拍一区二区三区精品|综合亚洲综合图区网友自拍|欧美日韩国产在线观看网站|99精品国产热久久精品尤物|国产亚洲精品福利在线免费观看

【Detail】

With the advances in modern science and technology, continuous improvement of people's living standard and the rapid development of computer technology, various office paper, printer ribbons, ink and other office supplies, requirements become more.White paper flat, ink adhesion without penetration, thin and unwrinkled, uniform surface texture, in a few words, is to have satisfied with the strength and hardness, coating, and split. The ink writes fluently, lines clear evenly without precipitation, shedding, fading, and blocking pen. It is demanding higher for printing with inks and coating with magnetic powder because sometimes plastic product is required to maintain longer without fading, such as the ID card production, film copies, and so on.In all of these office supplies, PVP with different molecular weight shows the use of superior performance.

Application of PVP in ink

PVP with good adhesive, used for ink to write and print firmly attached to the paper without shedding and fading. Furthermore, PVP has an dispersion effect on inorganic pigments and organic pigment ,uniformly dispersion system for ink without precipitation, plugging the pen and various nozzles, so handwriting is consistent. And PVP is not volatile, its durable role and function , especially printing or printing equipment downtime will not nozzle clogging, with repeated injection of fluently writing performance. Generally PVP K-12 and PVP K-30, low molecular weight, are used for ink. PVP K-30 added in the ballpoint pen ink and printing ink plays a part in protective colloid, thickening and sticky, as well as writing fluently, without overflow and fading, and reducing wear of ball beads, extending its life.

Now cite two examples of application of the formula and production methods :

Formula one : carbon ink

Formula two : ink for ball pen

A magnetic recording using ink recipe is as follows :

Application of PVP in paper and other office supplies

In the paper industry, PVP for improving paper strength, increasing soluble dyes and dispersing pigments, in the deinking of waste paper, rag decomposition, beating and rendering , is important assistants. When used as coating, PVP can improve the luster of the paper, printability and oil-resistant and especially jet printing paper coated with PVP,  it will make jet printing ink fast drying on paper. The transparent layer with good ink absorbency , insoluble in water, has good solidification and high speed imaging, especially suitable for multi-color ink jet printing.

Drawing transparent records of paper required for transparency, because of a pencil often used for drawing, transparent paper has good adhesive stability of lead powder. This paper is the matrix of transparent cellulose film. It is in the form of transparent cellulose film after cross-linking reaction of cellulose sulfate with PVP as the main component resin, 1%~10% of PVP content, forming transparent coating of 2-10 microns, cellulose film coated on the substrate.On the one hand, the PVP film is to make the film and substrate cellulose film firmly glued together, and have good adhesion on the stability of drawing with paint . On the other hand, the formation of transparent film with excellent properties of PVP , can make small transparent pigment granule coating and extend time to save the drawing, even though there is wear and tear that will not affect the integrity of the paint pattern.
The glue encounters a lot of inconveniences when commonly used. Only solid paste is solid at room temperature, can be used directly and overcome the liquid or viscous paste glue on the use of inconvenience. Solid Paste generally consists of three substances of different functions, namely, excipient, solvents and resin bonding agent. The most common PE bonding agent is PVP , using molecular weight between 40 000-90 000 ( K30 ) and 10 000,000-13 000 000 ( K90 ). Adjusting the ratio of excipient, PVP and solvents, it can be made into different hardness of rod - like solid pastes.

Others can be used as glue bonding agents,such as polyvinyl alcohol, Acrylic acid acrylamide, copolymer of polypropylene acid amine, methyl cellulose,ethyl cellulose, hydroxy ethyl cellulose, carboxyl-methyl cellulose, degradation water-soluble starch, ethoxy-lated starch, polyvinyl acetate, polyvinyl ether, polyvinyl chloride and other water - soluble or water dispersion of polymers. PVP performance is superior than the bonding agent component of these polymers as pastes(especially solid paste). As the lower production costs, more solid stick factory will use PVP.