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A kind of polyester film and manufacturing method thereof

A technology of polyester film and manufacturing method, applied in the field of polyester film, can solve the problem that technical data is not disclosed, and achieve the effects of good barrier property, high chemical resistance and good shielding property

Inactive Publication Date: 2015-08-26
TIANJIN SHIQI TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A kind of polyester film and manufacturing method thereof
  • A kind of polyester film and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1 raw material preparation stage:

[0051] 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.

[0052] 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;

[0053] Then mix 583kg of purified terephthalic acid, 389kg of ethylene glycol, 18kg of titan...

Embodiment 2

[0065] Embodiment 2 raw material preparation stage: the raw material prepared in this embodiment is the same as the raw material prepared in embodiment 1.

[0066] Film production stages:

[0067] (1) Pre-crystallize and dry 920kg film-grade polyester chips and 80kg polyester masterbatch chips. The temperature is controlled at 130°C to 185°C, and the drying time is 3.5 hours to 5 hours to control the water content of film-grade polyester chips Below 30ppm;

[0068] (2) After mixing 920kg of dried film-grade polyester chips with 80kg of polyester masterbatch chips, feed them into the extruder by metering. 275℃~288℃, the heating temperature of the melt tube is controlled at 275℃~288℃, and the temperature of the die head is controlled at 276℃;

[0069] (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 33°C;

[0...

Embodiment 3

[0074] Embodiment 3 Raw material preparation stage: the raw material prepared in this embodiment is the same as the raw material prepared in embodiment 1.

[0075] Film production stages:

[0076] (1) Pre-crystallize and dry 950kg film-grade polyester chips and 50kg polyester masterbatch chips. The temperature is controlled at 130°C to 185°C, and the drying time is 3.5 hours to 6 hours to control the water content of film-grade polyester chips Below 30ppm;

[0077] (2) After mixing 950kg of dried film-grade polyester chips with 50kg of polyester masterbatch chips, feed them into the extruder by metering. 275℃~295℃, the heating temperature of the melt tube is controlled at 275℃~295℃, and the temperature of the die head is controlled at 280℃;

[0078] (3) After the film-grade polyester chip and the polyester masterbatch chip are melted and extruded, they are cast on a cooling roll, and the temperature of the cooling roll is controlled at 35°C;

[0079] (4) The cast sheet is s...

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Abstract

The invention provides a polyester film. The polyester film comprises 90-98 percent by mass of a film grade polyester chip and 2-10 percent by mass of a polyester masterbatch chip. A manufacture method of the polyester film comprises corresponding special process parameters in melt extrusion, cooling roll, longitudinal stretching and transverse stretching processes. The polyester film has the beneficial effects that the catalyst component in the raw materials of the polyester film is a titanium homogeneous catalyst, can be used for manufacturing food package, such as plastic food boxes, fast-food boxes, cake boxes, moon-cake box holders and other package films, and can be used for realizing the effect of environment friendliness and no toxicity. According to the polyester film product, corresponding process conditions are set in the production process, so that a product has high-transparency, is non-toxic and odorless, and has the characteristics of high chemical resistance, high temperature resistance, aroma retaining property, good concealing property to ultraviolet ray, good insulation to oxygen and the like.

Description

(1) Technical field [0001] The invention relates to a polyester film, in particular to a polyester film and a manufacturing method thereof. (2) Background technology [0002] At present, most of the polyester film products on the market, especially the polyester chips and masterbatch chip raw materials used in the production of plastic food boxes, fast food boxes, cake boxes, moon cake box trays, etc., contain antimony heavy metals catalyst. 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 easil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08G63/183C08G63/87C08G63/85C08K3/36C08K5/521B29B13/06B29C47/92B29C55/14B29C35/02B29C48/92
CPCB29C2947/92828B29C2947/92561B29B7/82B29C47/92B29C2947/92514B29B7/72B29C47/0021B29C2947/92704B29C48/08B29C48/92B29C2948/92514B29C2948/92561B29C2948/92704B29C2948/92828
Inventor 刘世起
Owner TIANJIN SHIQI TECH DEV
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