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A highly filled oxidatively degradable polymer packaging material and its preparation method

A technology for oxidative degradation and packaging materials, applied in the field of packaging materials and their preparation, can solve problems such as the decline of mechanical properties, and achieve the effects of high mechanical strength, optimized formula, and rich source of raw materials

Inactive Publication Date: 2011-12-28
宋旭
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, adding a large amount of inorganic fillers often leads to a decline in mechanical properties. Therefore, on the premise of maintaining the mechanical properties of the product, further increasing the content of fillers is one of the key factors restricting the cost of packaging materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take 7 kg of heavy calcium carbonate with a particle size of 1500 mesh, and dry it at 100°C for 2 hours; stir and mix in a high-speed mixer, and add 0.2 kg of zinc titanate at a temperature of 100°C, and mix for 10 minutes; then add high-density polyethylene 3 kg, 0.1 kg of photodegradant, and 0.1 kg of thermal degradation agent are mixed evenly and then taken out of the mixture. Then put the mixture into a twin-screw (Φ35) extruder for extrusion and granulation. The temperature of the extruder is set at 190-220° C., and the rotation speed is 300 rpm to prepare the material for degradable shopping bags.

Embodiment 2

[0032] Select 8 kg of light calcium carbonate with a particle size of 2000 mesh and dry at 110°C for 2 hours; stir and mix in a high-speed mixer, add 0.1 kg of aluminate coupling agent at a temperature of 90°C, and mix for 12 minutes; then add low-density polymer 2 kg of ethylene, 0.05 kg of photodegradant, 0.1 kg of thermal degradation agent, and 0.1 kg of No. 80 polyethylene wax are evenly mixed and then taken out of the mixture. Then put the mixture into a twin-screw extruder for extrusion and granulation, the extrusion temperature is set at 190-220°C, and the rotation speed is 200rmp, so as to obtain the degradable stone paper material.

Embodiment 3

[0034] Take 0.05 kg of photodegradant, 0.1 kg of thermal degradation agent, and 0.3 kg of methylene maleate laurate and mix evenly, then add 0.5 kg of polypropylene, and banbury at 220 ° C for 5 minutes on an internal mixer to obtain a multifunctional masterbatch.

[0035] Take out 10 kg of fly ash with a particle size of 1000 mesh, add 0.2 kg of titanium composite coupling agent, and stir and mix in a high mixer at a temperature of 100 ° C for 6 minutes; then add 3 kg of copolymerized polypropylene and the multifunctional masterbatch in the previous step, and mix evenly. Then put the mixture into a Φ35 twin-screw extruder for extrusion and granulation. The extrusion temperature is set at 190-220° C. and the rotation speed is 300 rpm to obtain packaging materials.

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Abstract

A highly filled oxidatively degradable polymer packaging material and its preparation method, which are mixed and extruded from the following components, the components are calculated by weight: inorganic filler 70-90, polyolefin polymer 10-30, optical function Auxiliary 0.01-0.2, thermal functional additive 0.01-0.2, coupling agent 0.05-5, lubricant 0.01-5. Drying the powder of the inorganic filler, adding a coupling agent to a mixer to mix and activate it; then mixing it with a polymer and an oxidative degradation additive according to the ratio, melting and mixing it in an extruder and granulating it to obtain a packaging material. After use, the packaging material of the present invention can be absorbed into fragments or powder under the action of oxygen and sunlight in the natural environment, and further degrade into carbon dioxide, water and inorganic minerals, which solves the problem of "white pollution". The packaging material adopts non-toxic and harmless raw materials, has abundant sources, is low in cost, and can be widely used in fields such as food packaging and industrial product packaging.

Description

technical field [0001] The invention relates to a packaging material mainly composed of inorganic powder and a preparation method thereof, in particular to a highly inorganic powder-filled packaging material with oxidative degradation function and a preparation method thereof. Background technique [0002] At present, the general-purpose packaging materials are mainly paper and plastic, among which paper packaging materials are mostly made of plant fiber materials such as wood and reeds. The consumption of a large amount of plant fibers leads to the reduction of forest resources and soil erosion. A large amount of sewage and harmful gases are produced during the papermaking process, which pollutes the environment. The national environmental protection agency has carried out key monitoring and investigation on paper-making enterprises. Plastic-based packaging materials are mostly made of polyethylene, polypropylene, or polyvinyl chloride, which has high production costs. Bec...

Claims

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Application Information

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IPC IPC(8): C08L23/00C08L23/06C08L27/06C08L23/12C08K13/06
Inventor 宋旭季君晖王萍丽卢灿辉任中来张长安李昕忆姚妍
Owner 宋旭
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