Optical and thermal-oxidative dual-degradation plastic thin film and manufacturing method thereof
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A plastic film, double degradation technology, applied in the field of chemical industry, to achieve the effect of good mechanical properties
Inactive Publication Date: 2012-08-15
XUCHANG UNIV
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Plastic products that use the heat generated by garbage composting for thermo-oxidative degradation have not been reported yet.
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Embodiment 1
[0035] Preparation and performance test of photo-thermal-oxygen double-degradable plastic film.
[0036] 1. Preparation of photo-thermal-oxygen dual degradation masterbatch: nano-TiO 2 (P25 imported from Germany, domestic sub-packaging), iron carboxylate (Shandong Gaomi Youhe Additives Co., Ltd.), polyethylene micropowder (Jiangyin Ideal Plastic Technology Co., Ltd., Jiangsu Province), oxidized polyethylene wax (Gu Shandong Fengshen Chemical Co., Ltd.) according to the mass ratio of 1:1:1:4 to mix evenly, and then melt extrusion granulation.
[0037] 2. Preparation of light-thermo-oxygen double-degradable plastic film: Mix the degradation masterbatch obtained in 1 with linear low-density polyethylene particles (Sinopec Zhongyuan Petrochemical Co., Ltd.) at a mass ratio of 7:93. At this time, the catalyst The mass content in the film is 1%, and then blown into a film. The thickness of the resulting film was 25±5 μm.
[0038] The mechanical properties of the film prepared above...
Embodiment 2
[0046] Preparation and performance test of photo-thermal-oxygen double-degradable plastic film.
[0047] 1. Preparation of photo-thermal-oxygen dual degradation masterbatch: TiO 2 (P25 imported from Germany, subpackaged in China), manganese carboxylate (Shandong Gaomi Youhe Additives Co., Ltd.), polyethylene micropowder (Jiangyin Ideal Plastic Technology Co., Ltd., Jiangsu Province), oxidized polyethylene wax (Gu Shandong Fengshen Chemical Co., Ltd.) according to the mass ratio of 1:1:1:4 to mix evenly, and then melt extrusion granulation.
[0048] 2. Preparation of light-thermo-oxygen double-degradable plastic film: The method is the same as that in Example 1 (linear low-density polyethylene is also used).
[0049] 3. The mechanical properties of the film prepared above were tested according to the method of GBT 1040.3-2006, and its elongation at break and tensile strength were slightly lower than those of pure polyethylene film, which were 311% and 142MPa, respectively. The re...
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Abstract
The invention discloses an optical and thermal-oxidative dual-degradation plastic thin film and a manufacturing method thereof. The plastic thin film comprises a TiO2 photocatalyst and a transitional metal carboxylate thermal-oxidative degradation accelerating agent. The preparation method for the plastic thin film comprises the following steps of: uniformly mixing an optical catalyst, transitional metal carboxylate, polyethylene micro powder and oxidized polyethylene wax according to a certain proportion, performing melt extrusion, obtaining optical and thermal-oxidative dual-degradation plastic mother particles, uniformly mixing the plastic mother particles and polyolefin according to a certain proportion, and performing blow molding to obtain the optical and thermal-oxidative dual-degradation plastic thin film. According to the method, the process is simple, the raw materials are available and cheap, and the plastic thin film can be produced by the conventional plastic production equipment. The prepared plastic thin film can generate optical degradation under the irradiation of the sunshine and thermal-oxidative degradation by heat accumulated by stacked garbage, so that the waste plastic thin film which is not degraded by the sunshine completely can be continued to be subjected to thermal degradation. Furthermore, according to the method of the national standard (GB / T19276.2-2003), residues obtained by degradation of the thin film are determined, and a result shows that the degraded residues can be degraded by microorganisms, so that the optical and thermal-oxidative dual-degradation plastic thin film has extremely high practical value.
Description
technical field [0001] The present invention relates to a plastic film degradable in natural environment and its manufacturing method, specifically a photo-thermo-oxygen double degradable plastic film and its manufacturing method, which is mainly used for manufacturing packaging materials, disposable plastic articles, A series of products such as agricultural mulching film belong to the field of chemical industry. Background technique [0002] Polyolefin plastics are widely used in various aspects of the national economy and human life due to their economy, convenience and stability. Due to the very stable structure of this type of polymer, it is difficult to degrade under natural conditions. The use of a large number of disposable plastic products, such as plastic mulch, garbage bags, shopping bags, etc., not only brings convenience to people, but also causes serious harm to the ecological environment. pollute. It is estimated that global plastic waste is accumulating in ...
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