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Anti-bonding master batch for optical-grade biaxially-oriented PET (polyethylene terephthalate) films/sheets and production process thereof

A polyethylene terephthalate, biaxial stretching technology, applied in the field of anti-adhesion masterbatch, can solve the problems of affecting the optical properties of the film and the anti-adhesive effect, reducing the number of anti-adhesive particles, irregular particle shapes, etc. Achieve the effect of reducing powder accumulation on the roller and cleaning equipment, improving printing performance, and improving the rate of high-quality products

Inactive Publication Date: 2012-07-18
SHANTOU BEST SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This results in many ineffective small particles in the film, the number of effective anti-adhesive particles is reduced, the particle shape is irregular, and the particle size distribution is very wide, which seriously affects the optical properties and anti-adhesive effect of the film.
In addition, the effective content of silicon-containing polyester chips in the traditional standard method is 3000ppm

Method used

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  • Anti-bonding master batch for optical-grade biaxially-oriented PET (polyethylene terephthalate) films/sheets and production process thereof
  • Anti-bonding master batch for optical-grade biaxially-oriented PET (polyethylene terephthalate) films/sheets and production process thereof
  • Anti-bonding master batch for optical-grade biaxially-oriented PET (polyethylene terephthalate) films/sheets and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment one: An anti-adhesive masterbatch for optical-grade biaxially oriented polyethylene terephthalate film / sheet, specially used for ordinary packaging biaxially oriented polyethylene terephthalate film, consisting of the following components and parts by weight :

[0037] Polyethylene terephthalate 90

[0038] Silica 10

[0039] Among them, PET uses film-grade polyester chips; the anti-sticking agent uses gel method silica, and the particle size is controlled at 3-6um.

[0040] Described masterbatch is made according to the following steps:

[0041] S1 pre-drying;

[0042] S2 is produced by a twin-screw extruder, the temperature of each zone of the extruder is 250-290°C, the speed of the main engine is 200r / min-450r / min, the current is 300-400A, 1-3 stages of vacuum exhaust, vacuum degree -0.05mPa-0.1mPa ;

[0043] S3 granulation;

[0044] S4 The finished product is dried.

[0045] The material is cut by high-precision weighing. The screw element of the...

Embodiment 2

[0047] Embodiment two: An anti-adhesive masterbatch for optical-grade biaxially oriented polyethylene terephthalate film / sheet, specially used for ordinary packaging biaxially oriented polyethylene terephthalate film, consisting of the following components and parts by weight :

[0048] Polyethylene terephthalate 77.5

[0049] China clay 20

[0050] Ethylene bis stearic acid amide 2.5

[0051] Among them, polyethylene terephthalate is made of film-grade polyester chips, the anti-sticking agent is made of china clay, and the particle size is controlled at about 5-7um.

Embodiment 3

[0052] Embodiment three: An anti-adhesive masterbatch for optical-grade biaxially oriented polyethylene terephthalate film / sheet, specially used for ordinary packaging biaxially oriented polyethylene terephthalate film, consisting of the following components and parts by weight :

[0053] Polyethylene terephthalate 69.999

[0054] Calcium carbonate 30

[0055] Polyethylene wax 0.001

[0056] Among them, polyethylene terephthalate is made of film-grade polyester chips, anti-sticking agent is made of calcium carbonate, and the particle size is controlled at about 6-8um.

[0057] Comparative test: Based on the production of 12um biaxially oriented polyethylene terephthalate film, three formulations of anti-adhesive masterbatches were added respectively, and the test results were as follows:

[0058]

[0059] The test shows that: the anti-adhesive masterbatch prepared by adopting the method of twin-screw extruder and selecting the inorganic particles with a fixed size and ...

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Abstract

The invention provides an anti-bonding master batch for optical-grade biaxially-oriented PET (polyethylene terephthalate) films / sheets and a production process thereof. The anti-bonding master batch comprises the following components in parts by weight: 65-99 parts of PET and 1-35 parts of an anti-bonding agent, wherein the anti-bonding agent is composed of inorganic particles which are regular in shape and 0.5-10 mu m in mean particle size, and the melting point of the anti-bonding agent is more than 220 DEG C. The production process is implemented through the following steps of S1, pre-drying; S2, production implemented by using a double-screw extruder, wherein the temperature of each area of the extruder is 250-290 DEG C, the rotating speed of a principal machine is 200-450 r / min, the current is 300-400 A, 1-3 sections carry out vacuum exhaust, and the vacuum degree is minus 0.05mPa to plus 0.1mPa; S3, granulation; and S4, finished product drying. According to the invention, the detects in the prior art are overcome; and through adopting a direct mixing and melting machine-shaping method implemented by using the double-screw extruder, the preparation of the master batch which is simple in process, super-transparent, and excellent in anti-bonding effect is realized.

Description

technical field [0001] The invention relates to an anti-bonding masterbatch for optical-grade biaxially stretched polyethylene terephthalate film / sheet and a production process thereof. Background technique [0002] Biaxially oriented polyethylene terephthalate film is a kind of packaging film with comprehensive performance. It has good transparency and luster; has good air tightness and fragrance retention; excellent mechanical properties, its toughness is the best among all thermoplastics, and its tensile strength and impact strength are much higher than ordinary films; and Good strength, stable size, suitable for secondary processing such as printing and paper bags. Biaxially oriented polyethylene terephthalate film also has excellent heat resistance, cold resistance and good chemical resistance and oil resistance. [0003] Biaxially oriented polyethylene terephthalate film is mainly used in various packaging materials. In addition, it is also used in functional film c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K7/18C08K3/36C08K3/26C08K3/34B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/92B29C2948/92514B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895B29C2948/92914
Inventor 刘文敏
Owner SHANTOU BEST SCI & TECH
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