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Method for increasing capacity of biodegradable polyester blend film

A biodegradable polyester and blending technology, which is applied in the field of compatibilization of biodegradable polyester blend films, can solve the problems of poor compatibility, seldom consider improving the compatibility of different polyesters, etc. heterosexual effect

Active Publication Date: 2013-06-26
山东悦泰生物新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Therefore, although there are many reports on the blending of biodegradable polyesters, few reports consider improving the compatibility between different polyesters.
[0011] At present, although several common biodegradable polyester materials are aliphatic polyester or copolyester materials, their compatibility with each other is poor. For example, the microscopic morphology of PLA and PBS blends is a two-phase structure. PBS and PPC blends are also mutually incompatible "sea-island" structure

Method used

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  • Method for increasing capacity of biodegradable polyester blend film
  • Method for increasing capacity of biodegradable polyester blend film
  • Method for increasing capacity of biodegradable polyester blend film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Premix: first add different materials into the high-speed mixer in sequence, and the order of addition is: PLA, talcum powder, 1501 (semi-aromatic copolyester), 1201 (PBS), isopropyl tris(dodecylbenzenesulfonyl) titanate (KR-9S), dicumyl peroxide (BIPB), ADR4368, released after mixing in a high-speed mixer. The composition ratio of the blend is shown in Table 1.

[0042] Table 1 Blend composition ratio one

[0043]

[0044] Extrusion granulation: Add the premix into the co-rotating parallel twin-screw extruder for extrusion granulation. The temperature settings are: 140-170-180-185-185-190-190-190-185-185-185-180°C.

[0045] Film blowing: Blow the film with the particles made in the above process, and the temperature of each section of the film blowing machine barrel is 140-150-160-160-160-150°C. Comparative example 1

Embodiment 2

[0050] Premix: firstly add different materials into the high-speed mixer in sequence, and the order of addition is: 1501 (semi-aromatic copolyester), heavy calcium carbonate (1250 mesh), mica powder (1000 mesh), polypropylene carbonate (PPC), monoalkoxy pyrophosphate titanate coupling agent KR- 12. Dicumyl peroxide (DCP) and 1,4-butanediol diglycidyl ether are released after being mixed uniformly in a high-speed mixer. The composition ratio of the blend is shown in Table 3.

[0051] Table 3 Blend composition ratio three

[0052]

[0053] Extrusion granulation: Add the premix into the co-rotating parallel twin-screw extruder for extrusion granulation. The temperature settings are: 120-130-140-140-140-140-140-140-140-140-135-130°C.

[0054] Film blowing: Blow the film with the particles made in the above process, and the temperature of each section of the film blowing machine barrel is 110-120-130-130-130-120 °C.

Embodiment 3

[0060] Premix: First, add different materials into the high-speed mixer in turn, and the feeding order is: polysuccinic acid-terephthalic acid-butylene glycol ester (PBST) (melting point 110-120°C, melting index 3.8g / 10min), sodium sulfate (2000 mesh), wollastonite (2000 mesh), poly 3,4-hydroxybutyrate (P3,4-HB) (melting point 160-170°C, melting index 15.5g / 10min) , di(dioctyl pyrophosphate) glycolate titanate (KR138S), 2,5-dimethyl-2,5-di-tert-butylperoxyhexane, triglycidyl isocyanurate (TGIC), in The high-speed mixer is mixed evenly and released. The composition ratio of the blend is shown in Table 5. Melt index test conditions are: 190°C, 2.16kg.

[0061] Table 5 blend composition ratio five

[0062]

[0063] Extrusion granulation: Add the premix into the co-rotating parallel twin-screw extruder for extrusion granulation. The temperature settings are: 140-150-160-160-160-160-160-160-160-160-155-150°C.

[0064] Film blowing: Blow the film with the particles made in ...

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Abstract

The invention relates to a biodegradable polyester blend film, and in particular relates to a method for increasing the capacity of a biodegradable polyester blend film. The method for increasing the capacity of the biodegradable polyester blend film comprises the steps of: adding a high-activity titanate coupling agent, a free radical cross-linking agent and a multi-epoxy group compound into a blending compound system of two or more than two biodegradable polyesters and an inorganic or organic filler; initiating and promoting transesterification, proper intermolecular cross-linking reaction and end-group chain extension in a double-screw extruder with the length-diameter ratio of more than or equal to 48 and the total kneading blocks of more than or equal to 16 under the action of high temperature and high shear strength, thus increasing the capacity of blending polyester. Through utilizing the double-screw extruder with the high length-diameter ratio and high shear strength and introducing the titanate coupling agent, the free radical cross-linking agent and the multi-epoxy group compound are introduced, on-line capacity increasing of a biodegradable polyester / filler blend compound system is carried out, so that the anisotropy of the mechanical property of the film is greatly improved.

Description

technical field [0001] The invention relates to a biodegradable polyester blend film, in particular to a compatibilization method for the biodegradable polyester blend film. Background technique [0002] Today, the world's annual plastic consumption has exceeded 160 million tons. According to the statistics of China Plastics Processing Industry Association, China's annual plastic waste exceeds 3 million tons, of which about 60% of waste plastics are film products. Waste films are difficult to recycle and have a low utilization rate, which not only affects the appearance of the city, but also does not degrade for hundreds of years after being mixed into the soil, which will lead to soil compaction, crop yield reduction, and even water pollution. If incinerated, a large amount of toxic gas will be produced, causing secondary pollution. The expansive development of the plastics industry has led to over-reliance and overuse of plastics, and the growing problem of "white pollut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L67/04C08L69/00C08L3/02C08K3/34C08K3/26C08K3/30C08K3/22C08K5/41C08K5/14C08K5/521C08K5/1515C08K5/3492C08K5/10C08J3/24
Inventor 庞买只卢伟李宗华
Owner 山东悦泰生物新材料有限公司
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