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Thermoplastic cellulose and aliphatic copolyester blend film and preparation method

An aliphatic copolyester, thermoplastic technology, used in flat products, other household appliances, household appliances, etc., can solve the problems of low melt viscosity and high melt viscosity

Active Publication Date: 2020-10-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] One of the technical problems solved by the present invention is that the melt viscosity of thermoplastic cellulose and aliphatic copolyester blends in the prior art is too high to be applied to the problem that low melt viscosity is required to prepare films. Modified thermoplastic cellulose and aliphatic copolyester blend film, the blend material used in the film can effectively reduce the viscosity of the blend to "unexpectedly" lower than that of thermoplastic cellulose and aliphatic copolyester The blending addition theoretical viscosity of copolyester starting material; Make this blend have the processability that realizes being prepared into casting film at lower temperature, be better than prior art similar blend, and because blend Low melt viscosity allows for more energy-efficient processing

Method used

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  • Thermoplastic cellulose and aliphatic copolyester blend film and preparation method
  • Thermoplastic cellulose and aliphatic copolyester blend film and preparation method
  • Thermoplastic cellulose and aliphatic copolyester blend film and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0110] MD 3001PBSA and Eastman TM CAB-381-0.5 PolyLab HAAKE mentioned above TM Rheomex OS PTW16 co-rotating twin-screw extruder for melt blending extrusion pelletization. In the first section of the extruder, a calibrated volumetric particle feeder is used Feeding of MD 3001PBSA particles, the speed is: 1680g / hr, and the calibrated volumetric powder feeder is used for Eastman TM The feeding rate of CAB-381-0.5 powder is: 420g / hr. The temperatures of sections 2-11 of the extruder are: 140°C, 150°C, 160°C, 160°C, 160°C, 160°C, 160°C, 160°C, 160°C and 160°C, the screw speed is set at 200rpm, the torque At 48-52%. The extruder is equipped with a circular die with a diameter of 3 mm. After the spline is extruded from the die and cooled in a water bath, it is cut into cylindrical particles of about 3 mm with a pelletizer. The particles were collected, pumped in a vacuum oven at 60°C for 4 hours, and packaged for use. The melt index of the particles at 190° C. under 2.16 k...

Embodiment 2

[0112] MD 3001PBSA and Eastman TM CAB-381-0.5 PolyLab HAAKE mentioned above TM Rheomex OS PTW16 co-rotating twin-screw extruder for melt blending extrusion pelletization. In the first section of the extruder, a calibrated volumetric particle feeder is used MD 3001PBSA particle feeding, speed: 1365g / hr, while the calibrated volumetric powder feeder is used for Eastman TM The feeding rate of CAB-381-0.5 powder is: 735g / hr. The temperatures of sections 2-11 of the extruder are: 140°C, 150°C, 160°C, 160°C, 160°C, 160°C, 160°C, 160°C, 160°C and 160°C, the screw speed is set at 200rpm, the torque At 43-47%. The extruder is equipped with a circular die with a diameter of 3 mm. After the spline is extruded from the die and cooled in a water bath, it is cut into cylindrical particles of about 3 mm with a pelletizer. The particles were collected, pumped in a vacuum oven at 60°C for 4 hours, and packaged for use. The particles had a melt index of 5.96 g / 10 min at 190° C. under...

Embodiment 3

[0114] MD 3001PBSA and Eastman TM CAB-381-0.5 PolyLab HAAKE mentioned above TM Rheomex OS PTW16 co-rotating twin-screw extruder for melt blending extrusion pelletization. In the first section of the extruder, a calibrated volumetric particle feeder is used Feeding of MD 3001PBSA particles, the speed is: 1050g / hr, and the volumetric powder feeder after calibration is used for Eastman TM The feeding rate of CAB-381-0.5 powder is: 1050g / hr. The temperatures of sections 2-11 of the extruder are: 140°C, 150°C, 160°C, 160°C, 160°C, 160°C, 160°C, 160°C, 160°C and 160°C, the screw speed is set at 200rpm, the torque At 41-43%. The extruder is equipped with a circular die with a diameter of 3 mm. After the spline is extruded from the die and cooled in a water bath, it is cut into cylindrical particles of about 3 mm with a pelletizer. The particles were collected, pumped in a vacuum oven at 60°C for 4 hours, and packaged for use. The melt index of the particles at 190° C. unde...

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Abstract

The invention relates to a blend thermoplastic film of thermoplastic cellulose and an aliphatic copolyester, and mainly solves the problems in the prior art that the application fields of thermoplastic cellulose is limited because of high viscosity and poor film forming property of thermoplastic cellulose during low temperature processing and poor stretching property of a formed film. According tothe technical scheme, a blend consisting of 20% to 80% by mass of thermoplastic cellulose and 80% to 20% by mass of the aliphatic copolyester is employed and is prepared by a continuous melt-extrusion blending process. The melt viscosity of the blend is at least about 30% lower than a blending addition theoretical value of the two starting materials at a low shear rate of 100 s<-1>, and is at least 30% lower than the blending addition theoretical value of the two starting materials at a high shear rate of 1363 s<-1>. The technical scheme disclosed by the invention solves the above problem better and can be used in industrialized production of thermoplastic film products.

Description

technical field [0001] The invention belongs to the field of blend materials of thermoplastic cellulose and aliphatic copolyester, and specifically relates to a blend film of thermoplastic cellulose and aliphatic copolyester with special rheological properties. The invention also relates to A method for preparing thermoplastic cellulose and aliphatic copolyester blend films with special rheological properties. [0002] technical background [0003] Cellulose is the organic polymer with the largest reserves on the earth, and it is also the biomass material with the largest annual renewable amount. Cellulose is the structural material in the cell walls of green plants, woody plants contain about 30-40% cellulose, and cotton fibers contain about 90% cellulose. The main industrial use of cellulose is paper and cardboard, and a small amount of cellulose is used to prepare regenerated cellulose such as cellophane, viscose (Rayon) and some cellulose derivatives. [0004] Since cel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L1/14B29D7/01
CPCB29D7/01C08J5/18C08J2301/14C08J2367/02C08J2401/14C08J2467/02C08L1/14C08L67/02C08L2203/16
Inventor 詹姆斯·洪学·王周炳贾钦
Owner CHINA PETROLEUM & CHEM CORP
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