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Ultrathin polyester film and manufacturing method thereof

A technology of polyester film and manufacturing method, which is applied in the field of polyester film, can solve the problems of undisclosed technical data, and achieve the effects of good barrier property, good shielding property and high chemical resistance

Inactive Publication Date: 2014-07-02
TIANJIN SHIQI TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, no similar products have been found in the market, and no relevant technical information has been found to be published.

Method used

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  • Ultrathin polyester film and manufacturing method thereof
  • Ultrathin polyester film and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1 Raw material preparation stage:

[0044] Mix 2.5kg of sodium bicarbonate, 3kg of silicon oxide, 2kg of manganese oxide and 2.5kg of phosphorus trioxide to make an inorganic mixture; then mix 557kg of isopropyl titanate, 400kg of ethanol, 35kg of pure water and 8kg The inorganic mixtures are mixed, hydrolyzed, filtered, washed, dried, pulverized and ground to obtain a titanium-based homogeneous composite catalyst.

[0045] After mixing 588kg of purified terephthalic acid, 393kg of ethylene glycol and 19kg of titanium-based homogeneous composite catalyst, first undergo an esterification reaction at a temperature of 210°C to 240°C and a pressure of 0.5MPa to 1MPa for 65min to 90min, and then After 100min to 110min of polycondensation at a temperature of 275°C to 280°C, a pressure of 140Pa to 160Pa, and a vacuum of 30Pa to 50Pa, film-grade polyester chips are formed;

[0046] Then mix 583kg of purified terephthalic acid, 389kg of ethylene glycol, 18kg of titan...

Embodiment 2

[0055] Embodiment 2 raw material preparation stage: the raw material prepared in this embodiment is the same as the raw material prepared in embodiment 1.

[0056] Film production stages:

[0057] (1) Pre-crystallize and dry 700kg of film-grade polyester chips and 300kg of polyester masterbatch chips. The temperature is controlled at 120°C to 175°C, and the drying time is 3.5 hours to 4 hours to control the water content of film-grade polyester chips. Below 20ppm;

[0058] (2) After mixing 700kg of dried film-grade polyester chips with 300kg of polyester masterbatch chips, feed them into the extruder by metering. 268℃~275℃, the heating temperature of the melt pipe is controlled at 265℃~275℃, and the temperature of the die head is controlled at 272℃;

[0059] (3) After the two raw materials of film-grade polyester chip and polyester masterbatch chip are melted and extruded, cast sheets are formed on the cooling roll, and the temperature of the cooling roll is controlled at 29...

Embodiment 3

[0064] Embodiment 3 Raw material preparation stage: the raw material prepared in this embodiment is the same as the raw material prepared in embodiment 1.

[0065] Film production stages:

[0066] (1) Pre-crystallize and dry 800kg of film-grade polyester chips and 200kg of polyester masterbatch chips. The temperature is controlled at 120°C to 175°C, and the drying time is 3.5 hours to 4 hours to control the water content of film-grade polyester chips. Below 20ppm;

[0067] (2) After mixing the dried 800kg film-grade polyester chips with 200kg polyester masterbatch chips, feed them into the extruder by metering. 268℃~278℃, the heating temperature of the melt pipe is controlled at 265℃~278℃, and the temperature of the die head is controlled at 273℃;

[0068] (3) After the two raw materials of film-grade polyester chip and polyester masterbatch chip are melted and extruded, cast sheets are formed on the cooling roll, and the temperature of the cooling roll is controlled at 30°C...

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Abstract

An ultrathin polyester film is composed of a membrane-grade polyester slice and a polyester master batch slice, wherein the membrane-grade polyester slice accounts for 60% to 80% of the total weight of the ultrathin polyester film, and the polyester master batch slice accounts for 20% to 40% of the total weight of the ultrathin polyester film. The manufacturing method of the ultrathin polyester film is provided with corresponding special technological parameters in the processes of melt extrusion, roller cooling, longitudinal stretching, and horizontal stretching. The raw materials of the ultrathin polyester film contain a titanium homogeneous catalyst, so the ultrathin polyester film can be applied to the field of food package such as cooked food package, candy package, package for various kinds of foods, and the like, and is environment-friendly and nontoxic. Corresponding technological conditions are set in the production process of the polyester film product so as to achieve the product characteristics of high transparency, non-toxicity, no odor, high chemically-resistant performance, high temperature resistant performance, high corrosion resistant performance, good shielding performance on ultraviolet lights, and good oxygen gas obstructing performance.

Description

(1) Technical field [0001] The invention relates to a polyester film, in particular to an ultra-thin polyester film and a manufacturing method thereof. (2) Background technology [0002] At present, most of the polyester film products on the market contain antimony-based heavy metal catalysts in the polyester chips and masterbatch chip raw materials used. The advantages of antimony-based catalysts are high activity, less side reactions, and low price. The disadvantage is that antimony compounds themselves have certain toxicity, and their natural products are similar in nature to arsenic compounds. Studies have shown that long-term intake of a certain amount of antimony trioxide by the human body can cause mutations in the chromosomes of biological cells, and even lead to leukemia. In addition, it also has toxic effects on the nervous system of the human body and organisms, and can easily cause peripheral nerve failure in the human body and organisms. At the same time, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K13/02C08K3/36C08K5/521C08G63/183C08G63/85C08J3/22B29C69/00B29C47/92B29C55/14B29C48/92
CPCB29C47/0057B29B7/72B29C47/0066B29C47/0021B29C2947/92923B29B7/82B29C47/92B29C48/0018B29C48/0022B29C48/08B29C48/92B29C2948/92514B29C2948/92561B29C2948/92704B29C2948/92828B29C2948/92895B29C2948/92904B29C2948/92923
Inventor 刘世起
Owner TIANJIN SHIQI TECH DEV
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