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Black masterbatch special for BOPET and preparation method thereof

A technology of black masterbatch and carbon black, applied in the field of plastic coloring, can solve the problem of difficulty in ensuring the need for black BOPET film, and achieve the effect of not affecting transparency and good compatibility

Inactive Publication Date: 2010-05-05
常州市海虹共享塑料材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when making black or gray BOPET, due to the polarity of carbon black itself, and the higher the fineness, the easier it is to reunite, it is difficult to guarantee the black masterbatch prepared by conventional methods, even if it is a chemical fiber grade black masterbatch. Highly demanding black BOPET film requires

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A special black masterbatch for BOPET and its preparation method. It is composed of a carrier and carbon black. The carrier is high-viscosity bottle-grade PET, low-melting-point PET and special carbon black. %, carbon black 10%. The melting point of low melting point PET is 180°C. High viscosity bottle grade PET has a viscosity greater than 0.85. In the two-speed mixer, the stirring blade speed of the mixer is 475-950r / min, and 30% of carbon black, 50% of carrier high-viscosity bottle-grade PET, and 20% of low-melting point PET are put in proportion, and mixed at high speed for 15-25 minutes Finally, when the temperature of the material reaches 120°C-125°C, mix at a low speed for 10 minutes to remove water, and then discharge the material; then melt and blend the mixed material on a twin-screw machine with double forced exhaust, and the temperature is controlled at 230°C-255 °C, the screw speed is 260r / min. The pre-dispersed material of BOPET special black masterbatc...

Embodiment 2

[0015] A special black masterbatch for BOPET, which is composed of a carrier and carbon black. The carrier is high-viscosity bottle-grade PET and low-melting point PET, special carbon black. The weight percentages of each composition are high-viscosity bottle-grade PET50%, low-melting point PET20%, carbon black 30%. The melting point of low melting point PET is 180°C. High viscosity bottle grade PET has a viscosity greater than 0.85. In the two-speed mixer, the stirring blade speed of the mixer is 475-950r / min, and 30% of carbon black, 50% of carrier high-viscosity bottle-grade PET, and 20% of low-melting point PET are put in proportion, and mixed at high speed for 15-25 minutes Finally, when the temperature of the material reaches 120°C-125°C, mix at a low speed for 10 minutes to remove water, and then discharge the material; then melt and blend the mixed material on a twin-screw machine with double forced exhaust, and the temperature is controlled at 230°C-255 °C, the scre...

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Abstract

The invention relates to the technical field of plastic coloring, in particular to a black masterbatch special for BOPET and a preparation method thereof. The black masterbatch special for BOPET consists of a carrier and carbon black, wherein the carrier consists of high viscosity bottle grade PET and low melting point PET, the carbon black is special carbon black, and the weight percent of each component is as follows: 50-70 percent of the high viscosity bottle grade PET, 20 percent of the low melting point PET, and 10-30 percent of the carbon black. The black masterbatch special for BOPET consists of the carrier and the carbon black, wherein the carrier consists of the high viscosity bottle grade PET and the low melting point PET, and the carbon black is AS11 special carbon black. The invention provides a black masterbatch special for BOPET with extremely high dispersity, which can meet the requirements of high-end users and special package adhesive film users.

Description

technical field [0001] The invention relates to the technical field of plastic coloring, in particular to a special black masterbatch for BOPET and a preparation method thereof. Background technique [0002] PET stands for polyethylene terephthalate and is commonly used in fibers, extruded films and sheets, blow molding, etc. The BOPET film made of it has good toughness, mechanical strength and excellent transparency, and is a new generation of high-grade packaging materials. However, when making black or gray BOPET, due to the polarity of carbon black itself, and the higher the fineness, the easier it is to reunite, it is difficult to guarantee the black masterbatch prepared by conventional methods, even if it is a chemical fiber grade black masterbatch. Highly demanding black BOPET film is required. Contents of the invention [0003] In order to overcome the defects of BOPET produced under the existing technology, the invention provides a special black masterbatch for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K3/04
Inventor 李志远
Owner 常州市海虹共享塑料材料有限公司