Comparison of characteristics of plastic film for

The characteristics of "plastic film" for packaging. I hope the above introduction can help you. Compared with

plastic film as a printing material, its history is relatively short. It is used as a packaging after printing. The new material industrial park covering an area of 300 mu has the advantages of lightness and transparency, moisture and oxygen resistance, good air tightness, toughness and folding resistance, smooth surface, protection of goods, and reproduction of the shape and color of goods

with the development of China's industry, there are more and more varieties of plastic films. The commonly used plastic films include polyethylene (PE), polyvinyl chloride (PVC), polystyrene, polyester film (PET), polypropylene (PP), nylon, etc

various plastic films have different properties, different printing difficulties, and different uses as packaging materials

polyethylene film is a colorless, tasteless, odorless, translucent and non-toxic insulating material, which is widely used as packaging bags; Food bags can also be made into various containers. It is an inert material, so it is difficult to print. It must be processed before it can produce a better effect

PVC thin film has good light resistance and aging resistance, and has good tear resistance. It is breathable. It is a clean, colorless and transparent film. Generally, plasticizer is added. It is soluble in acetone, cyclohexanone and other solvents. Therefore, you can use oil made of PVC resin. How much do you know about spring tension compression fatigue testing machine? Next, our technicians help you further understand the ink printing of spring tension compression fatigue testing machine. Suitable for packing bags, book covers, etc

polystyrene film is a soft and tough film, which is clean, colorless and transparent. When there is no plasticizer, the film is always soft, freezing resistant, and aging free. When printing, the synthetic binder ink of oxidative polymerization is used, which can make the imprinting fastness better

polyester film is colorless, transparent, moisture-resistant, airtight, soft, strong, acid, alkali, oil ester and solvent resistant, and is not afraid of high and low temperatures. After spark treatment, it has better surface fastness to ink. For packaging and composite materials

polypropylene film has good gloss and transparency. It is heat-resistant, acid-base resistant, solvent resistant, friction resistant, tear resistant and breathable. It cannot be heat sealed below 160 ℃

nylon film is stronger than polyethylene film. It is tasteless, non-toxic, bacteria resistant, oil resistant, ester resistant, boiling water resistant and most solvents. It is generally used for heavy and wear-resistant packaging, as well as cooking packaging (reheating of food). It can be printed without surface treatment

polyethylene molecules basically do not carry polar groups, which is a kind of non-polar printing. In polypropylene molecules, each structural unit contains a methyl group. These weak polar groups are basically non-polar polymers. Therefore, their affinity for ink is relatively poor, so they need to be treated before printing to get a satisfactory print

most of the treatment methods are through oxidation to increase the polarity and change the surface structure. Specific treatment methods include discharge (commonly known as corona, electric spark) method, flame method, ultraviolet radiation method, acid (sulfuric acid, chromic acid) treatment method, etc. The discharge method is relatively simple and popular

the effect of corona treatment is related to the output power of the treatment equipment, the distance between the two electrodes, the discharge area of the electrode, the treatment speed, the treatment method (heat treatment or cold treatment) and the number of times. The treated film must be printed immediately, otherwise it may still fail

in spark treatment, due to the free radical reaction produced by corona discharge, the polymer may be crosslinked, the surface will become rough and increase its wettability to polar solvents. Generally speaking, the printing of plastic film can be improved by three aspects after rare pretreatment (Performance: Antistatic additives can be used). Trihydroxydodecylamide ethyl quaternary amine perchlorate is used in China, In order to improve the reduction effect of electrostatic charge attenuation and enhance the adhesion effect of ink, the wettability of solvent based ink has been improved in gravure printing and chiral printing

the printing method of plastic film can adopt flexo, gravure and silk printing. The ink used for printing after the bucktooth test piece reaches the set value is required to have the characteristics of high viscosity and strong adhesion, which can make the ink molecules firmly adhere to the dry plastic surface, and it is very easy to dry with oxygen in the air. Generally, the ink used for gravure printing plastic film is a colloidal fluid with good fluidity formed by synthetic tree esters such as panamine, organic solvents and pigments dominated by alcohols after full grinding and dispersion. It is a volatile dry ink, which has the characteristics of good printing performance, strong adhesion fastness, bright color and rapid drying. It is suitable for printing with gravure rotary machine source: Kaifeng social science and Technology Development Co., Ltd