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Biodegradable packing bag

A biodegradable and packaging bag technology, applied in the field of packaging bags, can solve the problems of insufficient strength, easy cracking, and non-degradable packaging bags, and achieve the effect of solving easy cracking, increasing toughness, and improving tensile strength

Inactive Publication Date: 2018-12-25
刘辉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems that the existing packaging bags cannot be degraded, are not strong enough, are easy to crack, and cannot meet the requirements of use, the present invention proposes a biodegradable packaging bag

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A biodegradable packaging bag, measure 1000mL of 18% sodium hydroxide aqueous solution, place it at 12-16°C and freeze it for 2-3 hours, add 24g chitosan and 36g cellulose, stir vigorously for 10min, and then Add 28g of starch and stir evenly to form a pretreatment liquid. After the pretreatment liquid is washed and dried, add 7g of ammonium persulfate and 5g of titanium isopropoxy triisostearate in sequence. The temperature of the extruder is 156°C, and the speed of the extruder is 447r / min. The extruded material is blown at a high pressure of 2.1MPa, at a high temperature of 166°C, and then sent to a blown film machine to make the biodegradable film. bags.

Embodiment 2

[0017] A biodegradable packaging bag, measure 800mL of 16% sodium hydroxide aqueous solution, place it at 12-16°C and freeze it for 2-3 hours, add 27g chitosan and 33g cellulose, stir vigorously for 10min, and then Add 26g of starch and stir evenly to form a pretreatment solution. After the pretreatment solution is washed and dried, add 10g of potassium persulfate and 4g of isopropoxy titanium triisostearate in sequence. After mixing evenly, the mixture is plasticized and extruded The temperature of the extruder is 158°C, and the speed of the extruder is 476r / min. The extruded material is blown under a high pressure of 1.9MPa and a high temperature of 163°C, and then sent to a blown film machine to make the biodegradable film. bags.

Embodiment 3

[0019] A biodegradable packaging bag, measure 600mL of 12% sodium hydroxide aqueous solution, place it at 12-16°C for 2-3 hours, add 30g of chitosan and 33g of cellulose, stir vigorously for 10min, and then Add 25g of starch and stir evenly to form a pretreatment solution. After the pretreatment solution is washed and dried, add 8g of sodium perpersulfate and 4g of aminopropyltriethoxysilane in sequence. After mixing evenly, the mixture is plasticized and extruded through an extruder , the temperature of the extruder is 155°C, the speed of the extruder is 428r / min, the extruded material is sent to the film blowing machine after being blown at a high pressure of 2.0MPa and a high temperature of 169°C to make the biodegradable packaging bag.

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Abstract

The invention discloses a biodegradable packing bag. The formula comprises chitosan, cellulose, starch, an initiator and a coupling agent. A preparation method of the biodegradable packing bag comprises the following steps: freezing a sodium hydroxide aqueous solution with the mass fraction being 10-20% for 2-3 hours at the temperature of 12-16 DEG C; adding the chitosan and the cellulose, intensively stirring for 5-15 min at high speed, and then adding the starch and uniformly stirring to form a pretreated solution; washing and drying the pretreated solution and then successively adding the initiator and the coupling agent; after mixing the components uniformly, plasticizing and extruding the mixture through an extruder; and carrying out pelleting and film blowing on an extruded materialto obtain the biodegradable packing bag. A natural high polymer material is used as a raw material, the prepared packing bag can be completely biodegraded, and does not pollute the environment, by compounding of the cellulose and the chitosan, the strength of extension of the packing bag is further improved, the toughness of the packing bag is improved, and the problem that the packing bag is easyto crack is solved.

Description

technical field [0001] The invention belongs to the technical field of packaging bags, in particular to a biodegradable packaging bag. Background technique [0002] Packaging bags, as the name suggests, are bags used to hold items. A small packaging bag brings convenience to thousands of households. According to the statistics of the Professional Committee of Plastic Recycling of the China Plastics Association, the daily use of packaging bags in my country is as high as 3 billion, of which 2 billion are only used for shopping in the market. At present, most of the packaging bags used in the market are made of polyethylene raw materials. The commonly used ones are: high-pressure low-density polyethylene, low-pressure high-density polyethylene and linear low-density polyethylene. There are also a small amount of packaging bags made of polyvinyl chloride. This packaging bag has caused very serious waste of resources and environmental pollution due to the huge amount of use. ...

Claims

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Application Information

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IPC IPC(8): C08L1/02C08L5/08C08L3/02C08K3/22C08K5/098C08K5/544C08J5/18B65D65/46
CPCB65D65/466C08J5/18C08J2301/02C08J2403/02C08J2405/08C08K3/22C08K5/098C08K5/544Y02W90/10
Inventor 刘辉
Owner 刘辉
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