Matt polyester film preparation method

A technology of polyester film and matt, which is applied in the field of preparation of matt polyester film, which can solve problems such as difficulty in uniform dispersion, difficulty in uniform dispersion of additives, uneven dispersion of additives, etc., and achieve a good matt effect

Active Publication Date: 2013-05-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding a crystallization nucleating agent during film production will cause excessive crystallinity of the film, resulting in disadvantages such as difficulty in stretching and uneven dispersion of additives
[0005] Chinese patent 200410039196.1 discloses a black opaque matte polyester film and a preparation method thereof, the patented polyester film

Method used

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  • Matt polyester film preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Add 400ml glass beads, 140g kaolin, 60g barium sulfate, 600g ethylene glycol, 0.3g sodium polyphosphate into a sand mill and grind for 1 hour to prepare kaolin-barium sulfate-ethylene glycol suspension, wherein kaolin-barium sulfate The average particle size is 0.32 μm.

[0021] Add 5.0Kg PTA, 3KgEG, 2.0g antimony acetate, 278g of the above-mentioned kaolin-barium sulfate-ethylene glycol suspension into a 20L general-purpose polymerization reactor, and carry out esterification at 230-265°C and 0.2-0.3Mpa (gauge pressure) Reaction, when the water output reaches 1200ml, release the pressure to normal pressure, add 1.025g of triphenyl phosphate, stir at normal pressure for 10 minutes, raise the temperature and lower the pressure to 280°C and below 100Pa, and react for 1 to 3 hours. After the reaction is completed, it is extruded by a melt pump, pelletized, and dried to obtain a matt polyester film slice with an intrinsic viscosity of 0.650 dl / g.

[0022] Pre-crystallize, ...

Embodiment 2

[0024] Add 400ml glass beads, 182g kaolin, 98g barium sulfate, 520g ethylene glycol, 0.7g potassium polyphosphate into a sand mill, and grind for 1.5 hours to prepare a kaolin-barium sulfate-ethylene glycol suspension, wherein kaolin-barium sulfate The average particle size is 0.36 μm.

[0025] Add 5.0kg of PTA, 3.0kg of EG, 0.93g of germanium dioxide, 413g of the above-mentioned kaolin-barium sulfate-ethylene glycol suspension into a 20L general-purpose polymerization reactor, and perform esterification at 230-265°C and 0.2-0.3Mpa (gauge pressure). Chemical reaction, when the water output reaches 1200ml, release the pressure to normal pressure, add 0.44g trimethyl phosphate, stir at normal pressure for 10 minutes, raise the temperature and lower the pressure to 280°C and below 100Pa, and react for 1 to 3 hours. After the reaction is completed, it is extruded by a melt pump, pelletized, and dried to obtain polyester chips for a matte film with an intrinsic viscosity of 0.610 d...

Embodiment 3

[0028] Add 400ml of glass beads, 300g of kaolin, 100g of barium sulfate, 400g of ethylene glycol, and 1.4g of potassium polyphosphate into a sand mill, and grind for 1.5 hours to prepare a suspension of kaolin-barium sulfate-ethylene glycol, in which kaolin-barium sulfate The average particle size is 0.39 μm.

[0029]Add 5.0kg of PTA, 3.0kg of EG, 1.71g of ethylene glycol antimony, 402g of the above-mentioned kaolin-barium sulfate-ethylene glycol suspension into a 20L general-purpose polymerization reactor, and conduct the polymerization at 230-265°C and 0.2-0.3Mpa (gauge pressure). For esterification reaction, when the water output reaches 1200ml, release the pressure to normal pressure, add 0.84g triethyl phosphate, stir for 10 minutes under normal pressure, raise the temperature and lower the pressure to 280°C and below 100Pa, and react for 1 to 3 hours. After the reaction is completed, it is extruded by a melt pump, pelletized, and dried to obtain polyester chips for matt ...

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Abstract

The invention discloses a matt polyester film preparation method, which comprises that: a dibasic acid, a dihydric alcohol and an additive dispersion liquid are subjected to an esterification reaction under an effect of a catalyst; a stabilizer is added to carry out a condensation polymerization reaction to obtain a matt film polyester; the matt film polyester is subjected to drying, melt extrusion at a temperature of 270-290 DEG C, vertical and horizontal double direction stretching, heat shaping, relaxing, cooling, traction and rolling to prepare the matt polyester film having a single layer or multi-layer structure, wherein the vertical and horizontal double direction stretching is performed at a temperature of 80-120 DEG C and under a stretching ratio of 3.0-4.0:1, the additive in the additive dispersion liquid comprises 60-80% by mass of kaolin and 40-20% by mass of barium sulfate, and an average particle size of the additive is 0.3-0.5 mum. Compared to the conventional polyester film, the matt polyester film prepared by the method has a good matt effect, wherein 45 DEG gloss is less than 30%.

Description

technical field [0001] The invention belongs to the field of polymer chemical industry, and in particular relates to the preparation of a matte polyester film. Background technique [0002] Biaxially oriented polyethylene terephthalate film (BOPET for short) has excellent physical and chemical properties and can be widely used in many fields. High clarity, high gloss biaxially oriented polyester film has been in great demand from the packaging industry as it imparts a glossy and attractive finish to packaging surfaces. Correspondingly, the low-gloss matte film can make the packaging surface more hazy and artistic, and stimulate consumers' desire to buy. In addition to the superior chemical and physical properties of ordinary polyester films, the matte film mainly has : High haze, low gloss, etc., with good aluminum plating and printing performance. Matte film is suitable for the production of special high-end labels for household appliances, computer precision instruments ...

Claims

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Application Information

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IPC IPC(8): C08G63/183C08G63/78C08K3/34C08K3/30C08L67/02B32B27/06B32B27/18B32B27/36B29C55/12B29K67/00B29L7/00
Inventor 王树霞戴钧明左志俊方娟石丽辉杨钟
Owner CHINA PETROLEUM & CHEM CORP
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