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Biodegradable material and preparation method thereof

A technology of biodegradable materials and inorganic fillers, applied in the field of biodegradable materials and their preparation, can solve the problems of high water vapor transmission rate of films and failure to meet packaging requirements

Inactive Publication Date: 2016-09-07
SHENZHEN PRINCE NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the water vapor transmission rate of the film produced with PBAT as raw material is high, which cannot meet the packaging requirements of food, medicine, electronic products, etc.

Method used

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  • Biodegradable material and preparation method thereof
  • Biodegradable material and preparation method thereof
  • Biodegradable material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0035] The preparation method of the above-mentioned biodegradable material comprises the following steps:

[0036] Step S110, using a high-speed mixer to stir each component evenly to obtain a mixture.

[0037] Preferably, the rotating speed of the high-speed stirring is 700-1300 rpm.

[0038] Step S120, extruding the mixture with a twin-screw extruder and then granulating to obtain the biodegradable material.

[0039] In one embodiment, the temperature of the twin-screw extruder is 120°C-180°C, the screw speed is 150-350rpm, and the aspect ratio is 30-40.

[0040] The preparation method of the biodegradable material is simple to operate.

[0041] A biodegradable film according to one embodiment is made of the above-mentioned biodegradable material.

[0042] In one embodiment, the thickness of the biodegradable film is 0.05-0.085 mm.

[0043] Dry the above biodegradable material at 85° C. for 3 hours, and use a blown film machine or cast film machine to prepare a biodegra...

Embodiment 1

[0048] The composition of the biodegradable material of embodiment 1 is:

[0049]

[0050] Wherein, mica is mica modified by silane coupling agent.

[0051] The above-mentioned components were stirred for 0.5 hours with a high-speed mixer, and then extruded and granulated with a twin-screw extruder to obtain a biodegradable material. Twin-screw extruder temperature: 120°C, 135°C, 155°C, 165°C, 170°C, 175°C, 170°C, die head temperature 170°C, screw speed 250rpm, aspect ratio 36.

[0052] Dry the biodegradable material at 85°C for 3 hours, and use a film blowing machine to obtain a biodegradable film.

[0053] The thickness of the biodegradable film is 0.05mm.

Embodiment 2

[0055] The composition of the biodegradable material of embodiment 2 is:

[0056]

[0057] Wherein, the modified montmorillonite is montmorillonite modified by octadecyltrimethylammonium bromide.

[0058] The above components were stirred by a high-speed mixer for 0.5 hours, and then extruded and granulated by a twin-screw extruder to obtain a biodegradable material. Twin-screw extruder temperature: 120°C, 145°C, 155°C, 165°C, 175°C, 180°C, 175°C, die head temperature 170°C, screw speed 300rpm, aspect ratio 40.

[0059] Dry the biodegradable material at 85°C for 3 hours, and use a film blowing machine to obtain a biodegradable film.

[0060] The thickness of the biodegradable film is 0.085mm.

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Abstract

The invention relates to a biodegradable material and a preparation method thereof. The biodegradable material comprises, by weight, 50-75 parts of poly(butyleneadipate-co-terephthalate), 25-50 parts of polypropylene carbonate, 2-8 parts of inorganic filler, 1-5 parts of plasticizers and 0.5-1 part of nucleating agents, wherein the inorganic filler is selected from at least one of montmorillonite, talcum powder, mica and nano-Al2O3. The biodegradable material is capable of blocking off water vapor effectively.

Description

technical field [0001] The invention relates to a biodegradable material and a preparation method thereof. Background technique [0002] Traditional films mainly use polyethylene as raw material, but polyethylene is a non-degradable material, which cannot be biodegraded after use and discarded, which will cause white pollution. In today's increasingly serious environmental problems, non-degradable materials are not the future development trend. Environmentally friendly biodegradable materials will be the first choice to solve white pollution and the key materials for future development. [0003] Polybutylene adipate-terephthalate (PBAT) is a biodegradable material whose final decomposition products are water and carbon dioxide. In addition, PBAT also has excellent tear resistance and impact performance, and is the material of choice for the production of high-performance film materials. The film produced with PBAT as raw material not only has excellent mechanical properti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L69/00C08K9/06C08K3/34C08K5/053C08K5/25C08K5/11C08K5/20C08K9/04C08K3/22C08K5/523C08K5/12B29C47/92B29C48/92
CPCB29C48/92B29C2948/9258B29C2948/92704C08K2201/011C08L67/02C08L69/00C08L2201/06C08L2201/14C08L2203/16C08K9/06C08K3/34C08K5/053C08K5/25C08K9/04C08K3/346C08K5/11C08K5/20C08K2003/2227C08K5/523C08K5/12
Inventor 熊平
Owner SHENZHEN PRINCE NEW MATERIALS CO LTD
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