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A kind of bright low melting point polyester biaxially stretched film and preparation method thereof

A technology of low melting point polyester and biaxial stretching, applied in the fields of polyester biaxially stretched film and its preparation, bright low melting point polyester biaxially stretched film and its preparation, can solve the problem of low melting point polyester structural strength and Problems such as poor crystallinity, difficulty in preparing low-melting polyester, and yellowing of the product can achieve the effects of improving catalytic efficiency and catalytic activity, avoiding low catalytic efficiency, and increasing reaction rate

Active Publication Date: 2019-04-05
JIANGSU YUXING FILM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is: in view of the serious yellowing of the product in the preparation process of the current low-melting point polyester, the difficulty in preparing high-quality and bright low-melting point polyester, and the low-melting point polyester itself due to poor structural strength and crystallinity, etc. , which makes it difficult to prepare a bright low melting point polyester biaxially stretched film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A bright low melting point polyester biaxially stretched film and its preparation method, the thickness of the low melting point polyester biaxially stretched film is 50 microns, the transverse heat shrinkage rate is 0.2% at 150°C for 15 minutes, and the longitudinal heat shrinkage rate is 0.2%. The thermal shrinkage rate is 1.0%;

[0042] A method for preparing a biaxially stretched polyester film with high brightness and low melting point is divided into the following steps:

[0043] (1) Preparation of Catalyst-Loaded Luminous Modifier

[0044] Using the sol-gel method, under stirring conditions, add barium hydroxide powder to the aqueous solution of polyethylene glycol 200 until the barium hydroxide is completely dissolved, then add dilute sulfuric acid solution, and stop adding dilute sulfuric acid after precipitation occurs. Then add an aqueous solution of titanyl sulfate to the system, dissolve it, and stir it ultrasonically at 80-95°C, then use pentylene glycol ...

Embodiment 2

[0064] A bright low-melting point polyester biaxially stretched film and a preparation method thereof, the thickness of the low melting point polyester biaxially stretched film is 150 microns, the transverse heat shrinkage rate is 0.1% at 150°C for 15 minutes, and the longitudinal heat shrinkage rate is 0.1%. The thermal shrinkage rate is 1.2%;

[0065] A method for preparing a biaxially stretched polyester film with high brightness and low melting point is divided into the following steps:

[0066] (1) Preparation of Catalyst-Loaded Luminous Modifier

[0067] Using the sol-gel method, under stirring conditions, add barium hydroxide powder to the aqueous solution of polyethylene glycol 200 until the barium hydroxide is completely dissolved, then add dilute sulfuric acid solution, and stop adding dilute sulfuric acid after precipitation occurs. Then add an aqueous solution of titanyl sulfate to the system, dissolve it, and stir it ultrasonically at 95°C, then use pentylene gly...

Embodiment 3

[0087] A bright low-melting point polyester biaxially stretched film and a preparation method thereof, the thickness of the low melting point polyester biaxially stretched film is 350 microns, the transverse heat shrinkage rate is 0.3% at 150°C for 15 minutes, and the longitudinal heat shrinkage rate is 0.3%. The thermal shrinkage rate is 1.3%;

[0088] A method for preparing a biaxially stretched polyester film with high brightness and low melting point is divided into the following steps:

[0089] (1) Preparation of Catalyst-Loaded Luminous Modifier

[0090] Using the sol-gel method, under stirring conditions, add barium hydroxide powder to the aqueous solution of polyethylene glycol 200 until the barium hydroxide is completely dissolved, then add dilute sulfuric acid solution, and stop adding dilute sulfuric acid after precipitation occurs. Then add an aqueous solution of titanyl sulfate to the system, dissolve it, and stir it ultrasonically at 80-95°C, then use pentylene ...

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Abstract

The invention belongs to the field of plastic film production processing and in particular relates to a super bright low-melting-point polyester biaxial oriented film and a preparation method thereof. The thickness of the low-melting-point polyester biaxial oriented film is 25-350 microns, and horizontal and longitudinal thermal shrinkage rates of 15 minutes at the temperature of 150 DEG C are respectively less than 1.5%. The preparation method comprises the following steps: firstly preparing a supported catalyst super bright modifier for a super bright supported catalyst by virtue of a sol-gel process, then beating terephthalic acid and ethylene glycol by utilizing the supported catalyst super bright modifier, so that beating liquid is obtained, then taking the beating liquid as a raw material to prepare an esterified product by virtue of an esterification process, then carrying out a pre-polycondensation process, so that super bright low-melting-point polyester is obtained, then pre-crystallizing the super bright low-melting-point polyester, and then preparing the super bright low-melting-point polyester biaxial oriented film by virtue of a biaxial orientation technology. The super bright low-melting-point polyester biaxial oriented film has excellent machinability and has broad application prospects in the industries of electronics, packaging, printing and the like.

Description

technical field [0001] The invention relates to a polyester biaxially stretched film and a preparation method thereof, in particular to a high glossy low melting point polyester biaxially stretched film and a preparation method thereof, belonging to the field of plastic film production and processing. Background technique [0002] China is a big country of polyester production. The annual production capacity of polyester in our country has reached 70 million tons. The polyester film is made of polyethylene terephthalate, which is made into thick sheets by extrusion and then biaxially stretched. Due to its excellent mechanical properties, high rigidity, hardness and toughness, puncture resistance, friction resistance, high temperature and low temperature resistance, chemical resistance, oil resistance, air tightness and fragrance retention, it is commonly used One of the barrier composite film substrates. The structure of low-melting point copolyester is similar to that of o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08G63/183C08G63/85B29C69/02B29C55/14B29C48/00
CPCB29C48/0018B29C55/143C08G63/183C08G63/85C08J5/18C08J2367/02C08L67/02
Inventor 陆川蒙钊王猛夏毅胡婧
Owner JIANGSU YUXING FILM TECH
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