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Biology-based thin film and production method thereof

A bio-based, film technology, applied in the field of packaging materials, can solve the problems of unsatisfactory mechanical, processing and use performance, unreasonable material application, unsuitable film layer design, etc., and achieves cost-effectiveness, low cost, and good printability. Effect

Pending Publication Date: 2017-01-04
ZHONGSHAN ZHENHONG PACKAGING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing bio-based films, the application of materials is unreasonable or the design of the film layer is not suitable. During production, some processes are relatively complicated, the operation is not easy to control, and the production is not stable enough, resulting in poor mechanical, processing and usability of the produced film materials. Ideal, some raw materials are not easy to obtain, and the production cost is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Raw material formula: PP 40%, modified starch 20%, biological polyester 20%, inorganic additives 20%.

[0028] Production method: Put 40% PE (polyethylene), 50% modified starch, 5% biopolyester, and 5% inorganic additives into the mixer, mix and stir evenly, and then send it to the single-layer blown film machine Blown into bio-based film.

[0029] Process parameters: the first stage of the film blowing process is 135°C, the second stage is 150°C, the third stage is 155°C, the sand screen is 160°C, and the die head is 160°C; the output frequency of the host inverter is 25Hz; the frequency of the traction motor inverter is 30Hz. Blown film machine extrusion die gap 1.7mm.

[0030] Product performance test data: thickness 4c; tensile force (tensile strength) 22Mpa; elongation at break ≥ 400%; specific gravity 0.9g / cm3.

Embodiment 2

[0032] Raw material formula: PP 50%, modified starch 30%, biological polyester 10%, inorganic additives 10%.

[0033] Production method: Put 50% of PP (polypropylene), 30% of modified starch, 10% of bio-polyester, and 10% of inorganic additives into the mixer, mix and stir evenly, and then send it to the single-layer blown film machine Blown into bio-based film.

[0034] Process parameters: The first stage of the film blowing process is 130°C, the second stage is 145°C, the third stage is 150°C, the sand screen is 155°C, the die head is 155°C; the output frequency of the main engine inverter is 20Hz; the frequency of the traction motor inverter is 35Hz. The gap between the extrusion dies of the blown film machine is 1.6mm.

[0035] Product performance test data: thickness 2c; tensile force (tensile strength) 20Mpa; elongation at break ≥ 250%; specific gravity 0.6g / cm3.

Embodiment 3

[0037] Raw material formula: PP 70%, modified starch 20%, biological polyester 5%, inorganic additives 5%.

[0038] Production method: Put 70% of PP (polypropylene), 20% of modified starch, 5% of biopolyester, and 5% of inorganic additives into the mixer. Made of bio-based films.

[0039] Process parameters: the first stage of the film blowing process is 135°C, the second stage is 150°C, the third stage is 155°C, the sand screen is 160°C, the die head is 160°C; the output frequency of the main engine inverter is 25Hz; the frequency of the traction motor inverter is 35Hz. Blown film machine extrusion die gap 1.7mm.

[0040] Product performance test data: thickness 8c; tensile force (tensile strength) 28Mpa; elongation at break ≥ 400%; specific gravity 0.75g / cm3.

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Abstract

The invention discloses a biology-based thin film and a production method thereof. The biology-based thin film is prepared by taking 40 percent to 70 percent of polyethylene or polypropylene, 20 percent to 50 percent of modified starch, 5 percent to 20 percent of biopolyester and 5 percent to 20 percent of inorganic additive as raw materials, evenly mixing the raw materials and blowing with a film blowing machine. The production method comprises evenly mixing the raw materials according to a set ratio, and then blowing with a monolayer film blowing machine or a multi-layer co-extrusion film blowing machine to form a monolayer thin film or multi-layer thin film. The production method of the biology-based thin film, disclosed by the invention, has the advantages that the production process is simple, operation is convenient, the raw materials are easy to get, the formula is simple and reasonable, and the cost is relatively low, and the produced thin film has very good mechanical property, processability and usability. The biology-based thin film contains biological components in the raw materials, so that oil resources can be saved in comparison with traditional plastic; the biology-based thin film is lower than the plastic in specific gravity, and has the characteristics of light weight, low cost and applicability; and heat required for heating is relatively small in production, so that the oil resources can also be saved, and carbon emission is reduced.

Description

technical field [0001] The invention belongs to the technical field of packaging materials, and relates to a bio-based film and a production method thereof. Background technique [0002] The main raw materials of existing film materials are traditional plastic raw materials, which are petroleum-based and require the use of a large amount of petrochemical resources, which will increase carbon dioxide emissions in the atmosphere. Moreover, these plastic films and film bag products made of petroleum-based raw materials, such as shopping bags, garbage bags, mail bags and industrial packaging bags, etc., cannot be degraded after use, resulting in serious environmental pollution. [0003] Bio-based films made from renewable bio-raw materials have become a new trend in the development of the plastics industry today. However, in the existing bio-based films, the application of materials is unreasonable or the design of the film layer is not suitable. During production, some process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/06C08L3/04C08L67/04C08K3/34B29C55/28
CPCB29C55/28C08L3/04C08L23/12C08L67/04C08L2203/16C08L2205/03C08K3/34C08L23/06
Inventor 金国柚石棣兴
Owner ZHONGSHAN ZHENHONG PACKAGING TECH
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