A kind of preparation method of polyester modified material and film product thereof

A polyester modification and polyester technology, applied in the field of fully biodegradable film products, can solve the problems of poor mechanical properties and barrier properties, difficult to control the degradation rate, and difficult large-scale production, etc., to increase surface smoothness, Solve the problem of interface compatibility and improve the effect of aging resistance

Active Publication Date: 2022-06-21
PUJING CHEM IND SHA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main material of this film product is polyhydroxyalkanoate. Although it is a bio-based degradable material, the degradation rate is not easy to control, and its mechanical properties and barrier properties are not as good as polyglycolide or polyethylene lactide.
And polyhydroxyalkanoate is a kind of intracellular polyester synthesized by many bacteria, the production cost is too high and the production efficiency is low, the output is low, and it is difficult to produce on a large scale

Method used

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  • A kind of preparation method of polyester modified material and film product thereof
  • A kind of preparation method of polyester modified material and film product thereof
  • A kind of preparation method of polyester modified material and film product thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A polyester modified material, by weight, 87.5 parts of PGA (intrinsic viscosity is 1.2dl / g), 10 parts of PBAT (intrinsic viscosity is 1.0dl / g) are dried with 0.5 parts of reaction aid peroxide peroxide Dibenzoyl, 0.5 part of antioxidant 1076, 0.5 part of lubricant oleic acid amide, 0.5 part of ultraviolet absorber UV531, and 0.5 part of light stabilizer 622 were added to the high mixer and stirred for 30 minutes, and then the mixture was passed through The twin-screw extruder is melt-blended at a screw length-diameter ratio of 40:1, a rotational speed of 35 r / min, a plasticizing section temperature of 200 °C, a homogenization section temperature of 225 °C, an extrusion section temperature of 230 °C, and a die temperature of 225 °C. After reaction extrusion modification, the modified material was naturally cooled to room temperature, and the intrinsic viscosity was 1.1dl / g by sampling.

[0035] The PGA modified material with an intrinsic viscosity of 1.1dl / g was blown w...

Embodiment 2

[0037]A polyester modified material, by weight, 40 parts of PGA (intrinsic viscosity is 3.0dl / g), 59.5 parts of PBAT (intrinsic viscosity is 2.9dl / g) are dried with 0.1 part of the reaction assistant peroxide peroxide Cumene, 0.1 part of antioxidant BHT, 0.1 part of lubricant zinc stearate, 0.1 part of ultraviolet absorber UV320, 0.1 part of light stabilizer 770 were added to the high mixer, stirred and mixed for 30min, and then the mixture was passed through The twin-screw extruder is melt-blended at a screw length-diameter ratio of 18:1, a rotational speed of 17 r / min, a plasticizing section temperature of 165 °C, a homogenization section temperature of 180 °C, an extrusion section temperature of 185 °C, and a die temperature of 180 °C. After reaction extrusion modification, the modified material was naturally cooled to normal temperature, and the intrinsic viscosity was 3.0dl / g by sampling.

[0038] The PGA modified material with an intrinsic viscosity of 3.0dl / g was blown ...

Embodiment 3

[0040] A polyester modified material, by weight, 65 parts of PGA (intrinsic viscosity is 2.3dl / g), 33.5 parts of PBAT (intrinsic viscosity is 2.1dl / g) are dried with 0.3 parts of reaction aid peroxyacetic acid Tert-amyl ester, 0.3 part of antioxidant 168, 0.3 part of lubricant calcium stearate, 0.1 part of ultraviolet absorber UV326, 0.2 part of ultraviolet absorber UV-P, 0.3 part of light stabilizer 783 were added to high-mix The machine was stirred and mixed for 30 minutes, and then the mixture was passed through a twin-screw extruder at a screw length-diameter ratio of 30:1, a rotational speed of 25 r / min, a temperature of 190 °C in the plasticizing section, 210 °C in the homogenization section, and 220 °C in the extrusion section. , The temperature of the die head is 210 ℃, the temperature of the die head is 210 ℃, and the extrusion modification is melted and blended. After the modified material is naturally cooled to room temperature, the intrinsic viscosity is 2.2 dl / g by...

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Abstract

The invention relates to a polyester modified material. The raw material is composed of the following components in parts by weight: 40-90 parts of polyester, 10-60 parts of polybutylene terephthalate-adipate, and a reaction aid 0.1-0.5 parts, 0.1-0.5 parts of antioxidant, 0.1-0.5 parts of ultraviolet absorber, 0.1-0.5 parts of lubricant, 0.1-0.5 parts of light stabilizer, polyester selected from polyglycolide or polyglycolide The one in; a kind of film product of polyester modified material, the preparation method of this film product, comprises the following steps: (1) after each raw material after drying is mixed according to proportioning, melt through twin-screw extruder React and extrude to granulate, and cool to normal temperature; (2) send it into a single-screw blown film machine, carry out extrusion, blown film, and obtain a film product after cooling. Compared with the prior art, the invention has the advantages of excellent flexibility, strength, aging resistance and full biodegradability.

Description

technical field [0001] The invention relates to a preparation method of a fully biodegradable material and a membrane product thereof, in particular to a modified material of PGA or PLGA and a fully biodegradable membrane product prepared therefrom. Background technique [0002] Plastic film products not only bring a lot of convenience to people in daily life, but also play a very important role in industrial and agricultural production, such as packaging films for various industrial products and mulch films used in agriculture. There are roughly two types of film products, one is a non-degradable plastic film product made of petroleum-based raw materials, such as PE, PVC, PP, etc. Although such film products are low in cost and cheap, they exist in the It cannot be degraded in the natural environment, causing serious "white pollution", especially the existence of a large amount of abandoned agricultural mulch in the land will cause the decline of land fertility and affect t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L67/02C08L91/00C08L23/06C08K5/098C08K5/526C08J5/18
CPCC08J5/18C08L67/02C08L67/04C08L2201/06C08L2205/03C08J2367/02C08J2367/04C08J2467/02C08J2467/04C08K5/098C08K5/526C08L91/00C08L23/06
Inventor 吴义斌刘伟孙朝阳
Owner PUJING CHEM IND SHA
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