Poly(butylene adipate terephthalate)/starch high-barrier composite membrane and preparation method of poly(butylene adipate terephthalate)/starch high-barrier composite membrane

A technology of butylene terephthalate and high-barrier composite film is applied in chemical instruments and methods, synthetic resin layered products, types of packaging items, etc. The complex preparation of copolymers affects the degradation performance of composite membranes, so as to reduce sensitivity, improve compatibility and ensure stability.

Active Publication Date: 2017-06-23
SHANDONG AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding a tie layer significantly increases the processing difficulty and production cost of the composite film
In addition, the patent also provides a method of adding an adhesive to each layer to improve the adhesion between layers, such as adding maleic anhydride-grafted polyolefin to the polyester layer, but polyolefin cannot be biologically Degradable, so it will affect the degradation performance of the composite film; the invention patent CN201510346803 discloses a high-strength multi-layer co-extruded biomass composite packaging film
The composite packaging film described in this patent is a three-layer film, which is a strength layer, an adhesive layer and an antibacterial layer, and each layer contains a starch graft copolymer. The function of this starch graft copolymer is to increase the concentration of starch and The compatibility of other components, but the preparation of starch graft copolymers is relatively complicated, and the cost is high, so it is difficult to promote and utilize better

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A polybutylene adipate terephthalate / starch high barrier composite film, its specific components and preparation method are as follows:

[0039] (1) The composition of the starch nanocomposite material layer and the preparation method of the pellets: 3.5Kg of hydroxypropyl crosslinked tapioca starch (hydroxypropyl substitution degree 0.2), 2.0Kg of polyvinyl alcohol, and poly(terephthalic adipate) Butylene glycol formate 700g, organically modified montmorillonite (modifier is dioctadecyl dimethyl ammonium chloride) 800g, maleic anhydride 60g, zinc stearate 190g, calcium stearate 370g, monoglyceride Grease 42g, citric acid 86g, glycerin 2.45Kg, acetyl n-butyl citrate 240g are poured in the high-speed mixer, stir and mix; The mixed material is granulated in a twin-screw extrusion granulator, and the temperature of the granulator is The temperature is 100-170°C, the head temperature is 165°C, the screw speed is 170rpm, and the powder is processed into pellets with a diamet...

Embodiment 2

[0046] A polybutylene adipate terephthalate / starch high barrier composite film, its specific components and preparation method are as follows:

[0047] (1) The composition of the starch nanocomposite layer and the preparation method of the pellets: 3.8Kg of acetate cross-linked tapioca starch (degree of substitution 0.4), 1.0Kg of polyvinyl alcohol, 500g of polycaprolactone, organically modified montmorillonite Soil (modifier is dioctadecyl dimethyl ammonium chloride) 700g, zinc stearate 100g, calcium stearate 220g, silane coupling agent KH550 80g, monoglyceride 70g, citric acid 95g, glycerin 2.5 Kg, 200g of n-butyl acetyl citrate, 43g of glyceryl triacetate are poured into a high-speed mixer, stirred and mixed; the mixed material is granulated in a twin-screw extrusion granulator, and the granulation temperature is 115-175°C , head temperature 170 ℃, screw speed 280rpm, the powder is processed into pellets with a diameter of 1-3mm.

[0048] (2) Composition of polybutylene ad...

Embodiment 3

[0054] A polybutylene adipate terephthalate / starch high barrier composite film, its specific components and preparation method are as follows:

[0055] (1) The composition of starch nanocomposite material layer and the preparation method of pellet thereof: with methoxy potato starch (methoxyl content 8.3%) 4.8Kg, polyvinyl alcohol 1.2Kg, carboxymethyl cellulose 0.6Kg, polyvinyl alcohol Caprolactone 900g, organically modified montmorillonite (modifier is dioctadecylmethyl-2-hydroxyethylammonium chloride) 700g, maleic anhydride 85g, zinc stearate 160g, calcium stearate 320g, monoglyceride 50g, adipic acid, 69g, glycerin 2.3Kg, glyceryl diacetate 260g are poured in the high-speed mixer, stir and mix; The material that mixes is granulated in the twin-screw extrusion granulator, The granulation temperature is 90-175°C, the head temperature is 170°C, the screw speed is 190rpm, and the powder is processed into pellets with a diameter of 1-3mm.

[0056] (2) Composition of polybutylen...

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Abstract

The invention relates to the field of food packaging and in particular provides a poly(butylene adipate terephthalate)/starch high-barrier composite membrane and a preparation method of the poly(butylene adipate terephthalate)/starch high-barrier composite membrane. The membrane adopts a sandwiched structure and takes a poly(butylene adipate terephthalate) as an outer layer; a sandwiched layer is a starch nano composite material layer; the thickness of the sandwiched layer accounts for 40 percent to 90 percent of the whole composite membrane; the composite membrane with the structure has a good barrier performance and is widely applied to packaging of products which are easy to oxidize, especially packaging of fresh agricultural products and high-oil foods; meanwhile, the production cost of a full degradable packaging membrane is remarkably reduced.

Description

technical field [0001] The invention relates to the field of food packaging, and specifically provides a polybutylene adipate terephthalate / starch high-barrier composite film and a preparation method thereof. Background technique [0002] The environmental pollution caused by petroleum-based plastics is becoming more and more serious, and there is an urgent need to replace them with fully degradable plastics. Polybutylene adipate terephthalate is a fully degradable material widely studied at home and abroad. However, the film prepared by pure polybutylene adipate terephthalate is soft and has low strength, which is limited in many application fields. Therefore, in the actual processing process, polybutylene adipate terephthalate is usually blended with other synthetic polyesters to improve its application performance. [0003] In addition, the high raw material cost of polybutylene adipate terephthalate is another important reason that limits its popularization and applica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/06B32B27/36B32B27/20B32B33/00C08L3/04C08L29/04C08L67/02C08L67/04C08L1/02C08L1/08C08L3/08C08L1/28C08L3/06C08K13/06C08K9/04C08K3/34C08K13/02C08K3/36C08K3/26B29C47/06
CPCB29C48/21B32B27/06B32B27/20B32B27/36B32B33/00B32B2307/7246B32B2439/70C08K2201/011C08L3/04C08L3/08C08L67/02C08L2201/06C08L2201/14C08L2203/16C08L2205/025C08L2205/03C08L2205/035C08L29/04C08K13/06C08K9/04C08K3/346C08L67/04C08L1/12C08L1/08C08K13/02C08K3/36C08L1/286C08L1/02C08L3/06C08L1/284C08K2003/265
Inventor 侯汉学董海洲王文涛代养勇张慧
Owner SHANDONG AGRICULTURAL UNIVERSITY
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