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Polyester modified material, film product thereof and preparation method of film product

A polyester modification and polyester technology, applied in the field of fully biodegradable film products, can solve the problems of inferior mechanical properties and barrier properties, difficult to control the degradation rate, difficult to large-scale production, etc., and achieve excellent flexibility, suitable for Used in blown film processing to improve the effect of aging resistance

Active Publication Date: 2017-10-31
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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  • Polyester modified material, film product thereof and preparation method of film product
  • Polyester modified material, film product thereof and preparation method of film product
  • Polyester modified material, film product thereof and preparation method of film product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of 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 auxiliary agent peroxidation Add dibenzoyl, 0.5 parts of antioxidant 1076, 0.5 parts of lubricant oleic acid amide, 0.5 parts of ultraviolet absorber UV531, and 0.5 parts of light stabilizer 622 into the high mixer and mix for 30 minutes, and then pass the mixture through The twin-screw extruder melts and blends at a screw length-to-diameter ratio of 40:1, a rotational speed of 35r / min, a plasticizing section temperature of 200°C, a homogenizing section temperature of 225°C, an extrusion section temperature of 230°C, and a die head temperature of 225°C. Reactive extrusion modification, after the modified material was naturally cooled to room temperature, the intrinsic viscosity was measured as 1.1dl / g by sampling.

[0035] Blow the PGA modified material with an intrinsic viscosity of ...

Embodiment 2

[0037]A kind of polyester modified material, by weight, after drying 40 parts of PGA (intrinsic viscosity is 3.0dl / g), 59.5 parts of PBAT (intrinsic viscosity is 2.9dl / g) and 0.1 part of reaction auxiliary agent diperoxide Add cumene, 0.1 part of antioxidant BHT, 0.1 part of lubricant zinc stearate, 0.1 part of ultraviolet absorber UV320, and 0.1 part of light stabilizer 770 into the high mixer and mix for 30 minutes, then pass the mixture through The twin-screw extruder melts and blends at a screw length-to-diameter ratio of 18:1, a rotational speed of 17r / min, a plasticizing section temperature of 165°C, a homogenizing section temperature of 180°C, an extrusion section temperature of 185°C, and a die head temperature of 180°C. Reactive extrusion modification, after the modified material was naturally cooled to normal temperature, the intrinsic viscosity was measured as 3.0dl / g by sampling.

[0038] Blow the PGA modified material with an intrinsic viscosity of 3.0dl / g with a ...

Embodiment 3

[0040] A kind of polyester modified material, by weight, after drying 65 parts of PGA (intrinsic viscosity is 2.3dl / g), 33.5 parts of PBAT (intrinsic viscosity is 2.1dl / g) and 0.3 part of reaction auxiliary agent peroxyacetic acid Tert-amyl ester, 0.3 part of antioxidant 168, 0.3 part of lubricant calcium stearate, 0.1 part of UV absorber UV326, 0.2 part of UV absorber UV-P, 0.3 part of light stabilizer 783 are added to the high mix Machine stirring and mixing for 30 minutes, and then the mixture is passed through a twin-screw extruder at a screw length-to-diameter ratio of 30:1, a rotational speed of 25r / min, a plasticizing section temperature of 190°C, a homogenizing section temperature of 210°C, and an extrusion section temperature of 220°C , at a die head temperature of 210°C, the melt blending reaction was extruded for modification. After the modified material was naturally cooled to room temperature, the intrinsic viscosity was measured as 2.2dl / g by sampling.

[0041] B...

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Abstract

The invention relates to a polyester modified material, a film product thereof and a preparation method of the film product. The polyester modified material contains the following components in parts by weight: 40-90 parts of polyester, 10-60 parts of terephthalic acid-dibutyl diacetate, 0.1-0.5 part of a reaction aid, 0.1-0.5 part of an antioxidant, 0.1-0.5 part of an ultraviolet absorbent, 0.1-0.5 part of a lubricating agent and 0.1-0.5 part of a light stabilizer, wherein polyester is selected from one of polyglycollide or poly(glycolide-lactide). The preparation method of the film product of the polyester modified material comprises the following steps: (1) uniformly mixing the dried raw materials, carrying out fusion reaction, extrusion and granulation by virtue of a twin-screw extruder, and cooling to the room temperature; and (2) feeding particles into a single-screw film blowing machine, carrying out extrusion and film blowing, and cooling, so as to obtain the film product. Compared with the prior art, the polyester modified material has the advantages of excellent flexibility, strength, aging resistance, full biodegradability and the like.

Description

technical field [0001] The invention relates to a preparation method of a fully biodegradable material and a film product thereof, in particular to a modified material of PGA or PLGA and a fully biodegradable film 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 products in industry and mulch films used in agriculture. There are roughly two types of film products. One is non-degradable plastic film products made from petroleum bases, such as PE, PVC, PP, etc. Although these film products are low in cost and cheap, they exist in the It cannot be degraded in the natural environment, causing serious "white pollution". In particular, the presence of a large number of discarded agricultural mulches in the land will cause land fertility to decline and affect crop growth. The s...

Claims

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Application Information

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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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