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Completely-biodegradable film bag material and preparation method of film bag

A biodegradable film and film bag technology, which is applied in the field of completely biodegradable film bag materials and film bag preparation, can solve problems such as white pollution, and achieve the effects of simple production process, reduced production cost, and good molding stability.

Inactive Publication Date: 2019-05-28
WUHAN HUALI BIOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a fully biodegradable film bag material and a film bag preparation method. The film bag product prepared by using this material has excellent tensile properties, opening properties, sealing strength, and puncture strength. White pollution problem of existing traditional plastic packaging bags

Method used

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  • Completely-biodegradable film bag material and preparation method of film bag

Examples

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preparation example Construction

[0025] The preparation method of the fully biodegradable film bag of the present invention comprises the following steps:

[0026] Step I, filler modification: add fillers with a moisture content of ≤0.2% to the mixer and stir, and set the temperature of the high-speed mixer to 110-140°C; add surface modification additives in batches during stirring, and add The proportion is 0.5-2.5% of the filler, the stirring speed is 400-800r / min, the material is mixed for 15-30 minutes, and the modified filler is obtained; the filler includes: inorganic filler talcum powder, calcium carbonate, barium sulfate, mica powder , organic filler lignin, cellulose;

[0027] Step II: 50-70 parts of film bag material PBAT, 5-20 parts of PLA, 0.3-2 parts of compatibilizer, 1-5 parts of plasticizer, 5-35 parts of modified filler, 0.2-1 part of anti-hydrolysis agent , add 0.5-2 parts of dispersant to a high-speed mixer and stir at room temperature for 5-10 minutes, mix well and then discharge; among t...

Embodiment 1

[0032] Add barium sulfate with a moisture content of ≤0.2% and a particle size of 1250-3000 mesh into a high-speed mixer at a temperature of 110-140°C and stir at a speed of 400-800r / min for 10 minutes, then add titanate coupling agents successively and a silane coupling agent as two surface modification additives, the addition ratio of the surface modification additive is 0.5-2.5% of the filler, and the material is stirred for 5 minutes to obtain modified barium sulfate for later use.

[0033] 50 parts of PBAT, 20 parts of PLA, 1.5 parts of compatibilizer PCL, 3 parts of plasticizer epoxy soybean oil, 30 parts of modified barium sulfate, 0.3 parts of carbodiimide or epoxy anti-hydrolysis agent, dispersant Add 1.3 parts of stearamide into a high-speed mixer and stir at room temperature for 5-10 minutes, mix well and discharge. Among them, the melt flow rate of PBAT and PLA is 3-5g / 10min (190°C / 2.16kg).

[0034] Add the uniformly mixed material into a twin-screw extruder, melt...

Embodiment 2

[0037] Add talcum powder with a moisture content of ≤0.2% and a particle size of 1250-3000 mesh into a high-speed mixer at a temperature of 110-140°C and stir at a speed of 400-800r / min for 10 minutes, then add aluminate coupling agent and Two kinds of borate-based surface modification additives, the addition ratio of the surface modification additives is 0.5-2.5% of the filler, and the material is stirred for 20 minutes to obtain modified talcum powder for later use.

[0038] 55 parts of PBAT, 15 parts of PLA, 0.3 parts of bisoxazoline chain extender as compatibilizer, 2 parts of plasticizer polyethylene glycol, 5 parts of modified talc, carbodiimide or epoxy anti-hydrolysis Add 0.2 parts of dispersant and 0.8 parts of vinyl bis stearamide into a high-speed mixer at room temperature and stir for 5-10 minutes, mix well and discharge. Among them, the melt flow rate of PBAT and PLA is 3-5g / 10min (190°C / 2.16kg).

[0039] Add the uniformly mixed material into a twin-screw extrude...

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Abstract

The invention relates to a completely-biodegradable film bag material and a preparation method of a film bag. The completely-biodegradable film bag material is prepared from mixing the following raw materials in parts by weight: 50 to 70 parts of PBAT (poly-butylene adipate-co-terephthalate), 5 to 20 parts of PLA (poly-lactic acid), 0.3 to 2 parts of a compatilizer, 1 to 5 parts of a plasticizer,5 to 35 parts of modified filler, 0.2 to 1 part of an anti-hydrolysis agent, and 0.5 to 2 parts of a dispersant, wherein the modified filler is prepared by adding an inorganic filler or organic fillerinto a mixing machine, stirring, sequentially adding a surface modifying additive in the stirring process, and mixing. When the modified filler is added into the material, the property of the film bag product is not degraded; however, the production cost is greatly reduced. The completely-biodegradable film bag material and the preparation method of the film bag has the advantages that the production technology is simple; the forming stability, opening property, puncturing-resistant property, dispersing property of color master batch are good; the surface is smooth, and the completely-biodegradable film bag material can be used for producing shopping bags, rolling bags, express bags, garbage bags and the like.

Description

technical field [0001] The invention relates to the field of material packaging, in particular to a fully biodegradable film bag material and a method for preparing the film bag. Background technique [0002] In recent years, plastics have been widely used due to their excellent properties. At the same time, more and more plastic wastes are generated. If plastic wastes are not handled properly, they will cause great harm to the environment. In order to solve these problems, various countries have successively introduced relevant policies to restrict the use of traditional petroleum-based plastics and include bio-based materials as strategic new development industries. With the sustainable development of society, people pay more and more attention to "environmental protection", and the development of fully biodegradable film bag materials has become an inevitable trend. Using fully biodegradable film bag materials to replace ordinary petrochemical plastics can effectively red...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L67/04C08L91/00C08K13/06C08K9/04C08K3/34C08K3/26C08K3/30C08K5/20C08J5/18
Inventor 孟庆阳丁正张立斌
Owner WUHAN HUALI BIOLOGY CO LTD
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