A kind of production technology of polyester film
A technology of polyester film and production process, which is applied in the field of polyester film, can solve the problems of polyester film breaking and affecting slicing efficiency, and achieve the effects of improving efficiency, good cutting effect, and high cutting efficiency
Active Publication Date: 2020-11-17
南通金威复合材料有限公司
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Problems solved by technology
[0003] When slicing the cast polyester film, the cast sheet is rolled up by the collecting roller, and then the polyester film is cut from one side during the winding process. After cutting to a certain extent, the cutting is stopped. The position between the cuts at both ends is a piece of polyester film. During the winding process, it is easy to cause the polyester film at the cut part to break, and then the polyester film needs to be rewound on the collection roller, which affects the overall slicing efficiency, in view of this, the present invention provides a production process of polyester film, which can reduce the occurrence of breakage in the slicing process and improve the efficiency of slicing
Method used
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[0029] In order to make the technical means realized by the present invention, creative features, goals and effects easy to understand, the following will further elaborate the present invention in conjunction with specific embodiments. Figure 4 view direction.
[0030] Such as Figure 1-6 Shown, the production technique of a kind of polyester film of the present invention, this technique comprises the following steps:
[0031] S1: Pre-crystallization drying, the polyester melt is pre-crystallized and dried, and the water content of the polyester melt is controlled below 35ppm, while the degree of crystallinity is 30-35%; the pre-crystallization temperature is 160-175°C, and the drying temperature is 150- 165°C, dehumidification temperature is 135-145°C, pre-crystallization drying time is 2.5-4.5 hours;
[0032] S2: Melt extrusion, the temperature of the preheating section of the extruder is controlled at 260-270°C, the temperature of the melting section is controlled at 27...
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Abstract
The invention belongs to the technical field of polyester films, and particularly relates to a production process of a novel polyester film. Joint cutting equipment used in the process comprises a base, a bent rod is fixedly connected to the top of the base, the top of the bent rod is bent downwards after being bent towards one side, and a horizontal sliding rail is fixedly connected to the top end of the bent rod; the transverse cutter is installed on the horizontal sliding rail through the hydraulic rod, the longitudinal cutter is installed at the bottom of the transverse cutter, the tip endof the longitudinal cutter is located at the position, close to the edge of a casting piece, above the casting piece, then the hydraulic rod is controlled to move downwards, and after the longitudinal cutter can cut the casting piece downwards to form an opening, the transverse cutter completely penetrates through the casting piece; and when the transverse cutting knife moves to the other edge ofthe casting piece and does not completely cut off the casting piece, the work of the horizontal sliding rail is stopped, at the moment, the two edges of the casting piece are not broken, when the collecting roller rolls up the casting piece, breakage cannot be caused, and the slicing efficiency is improved.
Description
technical field [0001] The invention belongs to the technical field of polyester films, in particular to a production process of polyester films. Background technique [0002] Polyester film (PET) is a film material made of polyethylene terephthalate as a raw material, which is made into a thick sheet by extrusion and then biaxially stretched. Printing and packaging consumables such as polyester film, environmental protection film, PET film, milky white film, etc., are widely used in glass steel industry, building materials industry, printing industry, medicine and health. Polyester film is also called polyester film, light sheet, polyester film, photosensitive paper, polyester film, benzene tin film, cellophane, release film. [0003] When slicing the cast polyester film, the cast sheet is rolled up by the collecting roller, and then the polyester film is cut from one side during the winding process. After cutting to a certain extent, the cutting is stopped. The position ...
Claims
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IPC IPC(8): B29C69/00B29B13/06B29C48/92B29C35/16B29C55/00B29C55/02B26D11/00B26D1/08B26D1/10B26D5/12B26D7/01B29K67/00B29L7/00
CPCB26D1/085B26D1/105B26D5/12B26D7/018B26D11/00B29B13/065B29C35/16B29C48/92B29C55/005B29C55/02B29C69/001B29C2948/92514B29C2948/9258B29C2948/92704B29K2067/003B29L2007/00
Inventor 郭芮
Owner 南通金威复合材料有限公司