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Double Drawing Process Of Plastic Sheet Oct 18, 2017

Double Drawing Process of Plastic Sheet
Double - drawn polypropylene film is made by the co - extrusion of polypropylene particles formed by the sheet, and then by the vertical and horizontal stretching in the two directions. Today, Plastic Sheet manufacturers take you to understand the Plastic Sheet's two-way stretch process.
Because of the tensile orientation, so the physical stability of the film, mechanical strength, air tightness is better, transparency and gloss higher, tough wear, is currently the most widely used printing film, the general use of the thickness of 20 ~ 40 μ m, the most widely used for 20 μ m. The main drawback of the biaxially oriented polypropylene film is that the heat-sealing property is poor, so it is ideal for the outer film of composite film, such as moisture resistance, transparency, strength, stiffness and printing, which are ideal for Dressed in dry food.
Since the surface of the biaxially stretched polypropylene film is non-polar, the crystallinity is high and the surface free energy is low, so that its printing performance is poor, the adhesion to the ink and the adhesive is poor, and the surface is required before printing and recombination deal with.
Plastic Sheet Plastic Sheet is mainly used in the packaging field. Plastic Sheet can be used for food packaging, electrical products packaging, daily necessities packaging, clothing packaging and so on. They have a common point, that is, the Plastic Sheet should be color printing, and as a food packaging but also multi-layer composite or vacuum aluminum and other process operations.
Therefore, the requirements of Plastic Sheet surface freedom can be high, wet tension to be large, in favor of printing ink, adhesive or aluminum layer and Plastic Sheet firmly bonded; in the Plastic Sheet production and high-speed packaging process, then The film surface requires a certain degree of friction to prevent film adhesion or slip; in the electrical, electronic products and other packaging, the film requires a certain anti-static properties and so on.
Plastic Sheet is the most widely used in packaging. Plastic Sheet can be used for food packaging, electrical products packaging, daily necessities packaging, clothing packaging and so on. Today, Plastic Sheet manufacturers take you to understand the requirements of Plastic Sheet.
They have a common point, that is, the Plastic Sheet should be color printing, and as a food packaging but also multi-layer composite or vacuum aluminum and other process operations. Therefore, the requirements of Plastic Sheet surface freedom can be high, wet tension to be large, in favor of printing ink, adhesive or aluminum layer and Plastic Sheet firmly bonded.
In the plastic sheet production and high-speed packaging process, the film surface requires a certain degree of friction to prevent film adhesion or slip; in the electrical, electronic products and other packaging, the film requires a certain anti-static properties.
There are many varieties of Plastic Sheet on the market, but the most commonly used printing film is BOPP, NY, PET, PE. In terms of printing, the most important of course is the plastic sheet surface treatment effect, NY film is damp. Plastic Sheet manufacturers to take you to understand the Plastic Sheet purchase requirements.
PE film is our focus to focus on the object: blown film may have membrane leakage corona treatment; membrane thickness is too large or uneven corona effect is not enough; blown film is to add too much slip agent or high cool The proportion of slag particles is too large to cause a significant decrease in corona effect. 12 ~ 15umPET film on both sides of the corona effect is not much difference, easy to lead to printing film roll back sticky failure. Printed film corona requirements: BOPP, PE ≥ 38 dyne, PET ≥ 50 dyne, NY ≥ 52 dyne. NY film after the water will not have a greater impact on the corona effect, to determine whether the nasal film N film whether the phenomenon of contraction from the film, cut a film into the oven for several hours, feel is hard, if there is a trend , Hard hair and so on, then the NY film too much water.
In the purchase of Plastic Sheet must be to the supplier to explain the use and requirements of the film, Plastic Sheet varieties refinement, said PET, NY, BOPP name, the supplier may have several varieties, but not necessarily suitable.