Preparation method of inorganic micro-powder/PBAT full-degradable composite film

A technology of inorganic micropowder and composite film, applied in the field of packaging materials, can solve the problems of easy adhesion, high cost, etc., and achieve the effect of simple process, low price, and improvement of the blown film production process

Pending Publication Date: 2020-09-11
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problems of high cost and easy adhesion of the current degradable composite film, the purpose of the present invention is to provide a preparation method of inorganic micropowder / PBAT fully degradable composite film, optimized performance and reduced production cost to adapt to the mass market need

Method used

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  • Preparation method of inorganic micro-powder/PBAT full-degradable composite film
  • Preparation method of inorganic micro-powder/PBAT full-degradable composite film
  • Preparation method of inorganic micro-powder/PBAT full-degradable composite film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] like figure 1 method, the 5000 mesh calcium carbonate powder (CaCO 3 , derived from limestone) is added to the hopper, blended with PBAT masterbatch, the amount of calcium carbonate micropowder is 25% of PBAT masterbatch, and fully mixed evenly, the blended raw materials are produced through screw extruder and blown film process Composite film , and winding, the temperature of each zone of the screw extruder is between 120 and 150 °C, the thickness of the composite film is 50 μm, and the width is 0.01 m.

[0027] Narrow and wide composite films can be used in the outer packaging of disposable straws and chopsticks, etc., and wider ones can be used in various specifications of shopping bags, packaging bags, takeaway bags, etc. figure 2 The mechanical performance test of the calcium carbonate / PBAT composite film with a relative content of 25% shows a strength of 32Mpa and an elongation at break of 110%, and the performance is very excellent.

Embodiment 2

[0029] Add 500 mesh mica powder (derived from mica stone) to the hopper, blend with PBAT masterbatch, the amount of silicon micropowder is 0.5%, 5%, 10% of PBAT masterbatch, and fully mix evenly; the blended raw materials are passed through The composite film is produced by the film blowing process and wound. The thickness of the obtained composite film is 10-50 μm and the width is 0.2-1 m. The wound composite film can be used as an agricultural mulch film. The wound composite film is passed through the bag-making process Fully biodegradable bags of different specifications are produced.

Embodiment 3

[0031] Add 2000-mesh talc powder and quartz powder to the hopper at a ratio of 1:1, and blend with PBAT masterbatch, where the powder is 50% of the PBAT masterbatch, and mix well, and the blended raw materials are produced by blown film process Composite film, and winding, the temperature of each zone of the screw extruder is between 120 and 150°C, the thickness of the composite film is 5-30μm, and the width is 0.15-0.35m, and the wound composite film is produced by bag-making process Fully biodegradable bags of different specifications.

[0032] image 3 It shows the microscopic morphology of the talc powder and quartz powder (1:1) / PBAT composite film with a relative content of 50%, which shows good dispersion, and its performance meets the application requirements.

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Abstract

The invention provides a preparation method of an inorganic micro-powder/PBAT full-degradable composite film. A certain proportion of inorganic micro-powder is added before the process of producing the PBAT film through hot melting film blowing, so that the fully-degradable composite film with excellent performance is produced; the inorganic micro-powder is derived from various kinds of stone powder in the nature and is rich in reserves and low in price; by adding a certain amount of inorganic micro-powder, the easy adhesion characteristic of the PBAT film is reduced, the stiffness of the filmis improved, and therefore the PBAT film blowing bag making process is facilitated; meanwhile, the production cost is reduced by adding the inorganic micro-powder, and a shortcut is provided for rapid popularization and application of full-degradable materials.

Description

technical field [0001] The invention relates to a degradable composite film, in particular to a method for preparing an inorganic micropowder / PBAT fully degradable composite film, and belongs to the technical field of packaging materials. [0002] technical background [0003] Polybutylene terephthalate adipate (PBAT) is a new type of degradable plastic, with excellent mechanical properties (tensile strength and elongation at break) and very good film-forming properties, it is ideal Green environmental protection film packaging material. But the current high price inhibits its large-scale use. The mechanical properties of PBAT film are very excellent, but the molecular chain of PBAT contains benzene ring, the molecular chain is relatively polar, and shows good adhesion, which leads to the adhesion of the film produced by blown film without opening. [0004] Xiong Ping et al. proposed a biodegradable composite material blended with PLA and PBAT in the publication number CN10...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L67/02C08K3/26C08K3/36C08K3/34C08K3/30
CPCC08J5/18C08J2367/02C08K2003/265C08K3/36C08K3/34C08K2003/3045C08K3/346C08K2201/005
Inventor 余厚咏王闯周颖
Owner ZHEJIANG SCI-TECH UNIV
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