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A kind of calcium carbonate highly filled biodegradable film and preparation method thereof

A technology of biodegradation and biodegradation of polyester, which is applied in the field of calcium carbonate highly filled biodegradable film and its preparation, can solve the problems of calcium carbonate easy to agglomerate and the performance degradation of film products, and achieve good material performance, increase content and reduce cost Effect

Active Publication Date: 2021-03-23
QUANGANG PETROCHEM RES INST OF FUJIAN NORMAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the filling amount of calcium carbonate has a certain limit. When the content of calcium carbonate is high, calcium carbonate is easy to agglomerate in the matrix resin, which makes the performance of film products decrease. Therefore, how to effectively increase the amount of calcium carbonate added to reduce material costs, very important

Method used

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  • A kind of calcium carbonate highly filled biodegradable film and preparation method thereof
  • A kind of calcium carbonate highly filled biodegradable film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A calcium carbonate highly filled biodegradable film and a preparation method thereof, the steps are as follows:

[0036] 1) Select 80kg of 6000 mesh calcium carbonate and dry it at 100°C for 2 hours;

[0037] 2) The calcium carbonate obtained in step 1) and 1.6 kg of triphenylmethane triisocyanate were stirred and mixed in a high-speed mixer at a temperature of 100° C., and mixed for 30 minutes to obtain activated calcium carbonate;

[0038] 3) Calcium carbonate after the activation obtained in step 2), polybutylene succinate, 1.339kg 4,4-diphenylmethane diisocyanate and 0.584kg chain extender according to the setting The ratio is molded into a molten material by means of an internal mixer, the mixing time is 1 hour, and the temperature is 190 ° C, and then compression molded into a sheet, cooled and cut to obtain a polyurethane elastomer filled with calcium carbonate;

[0039] 4) The polyurethane elastomer highly filled with calcium carbonate obtained in step 3), 8 k...

Embodiment 2

[0042] A calcium carbonate highly filled biodegradable film and a preparation method thereof, the steps are as follows:

[0043] 1) Select 80kg of 6000 mesh calcium carbonate and dry it at 100°C for 2 hours;

[0044] 2) The calcium carbonate obtained in step 1) and 1.6 kg of triphenylmethane triisocyanate were stirred and mixed in a high-speed mixer at a temperature of 100° C., and mixed for 30 minutes to obtain activated calcium carbonate;

[0045] 3) The activated calcium carbonate obtained in step 2), 6.433kg of polybutylene succinate, 1.387kg of 4,4-dicyclohexylmethane diisocyanate and 0.58kg of chain extender according to the set The ratio is molded into a molten material by means of an internal mixer, the mixing time is 1 hour, and the temperature is 190 ° C, and then compression molded into a sheet, cooled and cut to obtain a polyurethane elastomer filled with calcium carbonate;

[0046] 4) The polyurethane elastomer highly filled with calcium carbonate obtained in step ...

Embodiment 3

[0049] A calcium carbonate highly filled biodegradable film and a preparation method thereof, the steps are as follows:

[0050] 1) Select 70kg of 5000 mesh calcium carbonate and dry it at 100°C for 2 hours;

[0051] 2) The calcium carbonate obtained in step 1) and 1.05kg L-lysine triisocyanate were stirred and mixed in a high-speed mixer at a temperature of 100° C., and mixed for 30 minutes to obtain activated calcium carbonate;

[0052] 3) calcium carbonate after the activation obtained in step 2), polybutylene terephthalate, 0.793kg 4,4-diphenylmethane diisocyanate and 0.426kg chain extender according to design Molded into a molten material by mixing with a mixer at a fixed ratio, the mixing time is 1.5h, the temperature is 170°C, and then compression molded into a sheet, cooled and cut to obtain a polyurethane elastomer filled with calcium carbonate;

[0053] 4) Cast the polyurethane elastomer highly filled with calcium carbonate obtained in step 3), 10kg PLA, 12kg PBAT, ...

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Abstract

The invention discloses a calcium carbonate highly-filled biodegradable film and a preparation method thereof. The calcium carbonate highly-filled biodegradable film comprises, by weight, 70-80 partsof calcium carbonate, 8-22 parts of a biodegradable polymer, 1-2 parts of a plasticizer, 7-10 parts of a biodegradable polyurethane elastomer and 0.5-2 parts of triisocyanate. The preparation method comprises the following steps: calcium carbonate powder is added to the polyisocyanate and is modified, the isocyanate-modified calcium carbonate is mixed and reacted with the biodegradable polyurethane elastomer through an internal mixer, and the obtained reaction product and other raw materials are cast into the film through a special casting device for rich mineral paper. The calcium carbonate grafted with the isocyanate is used as the component of the molecular chain of the polyurethane elastomer in order to improve the compatibility of the calcium carbonate and the polymer matrix, and thepolyurethane elastomer has a toughening effect on the film in order to further improve the filling amount of the calcium carbonate to 70-80%; and the product also has the advantages of greenness, environmental protection, low cost, simple preparation process and wide application range.

Description

technical field [0001] The invention relates to the technical field of packaging materials. More specifically, it relates to a calcium carbonate highly filled biodegradable film and a preparation method thereof. Background technique [0002] At present, most of the films on the market are made of petroleum-based polyolefins (polyethylene, polypropylene, polyvinyl chloride, etc.), most of which cannot be recycled, and polyolefin products take a long time to degrade, so they will A large amount of garbage is produced, causing quite serious "white pollution". In addition, due to the increasing depletion of oil resources, rising oil prices, and the release of "plastic restriction orders" in various countries, the cost has continued to rise. Therefore, people are urgently looking for a film product that can completely degrade in a short period of time and can replace petroleum-based products. [0003] Biodegradable polymer materials are environmentally friendly and sustainable...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/06C08L67/02C08L67/04C08K9/04C08K3/26C08K5/11C08J5/18
CPCC08J5/18C08J2367/02C08J2375/06C08J2467/02C08J2467/04C08K5/11C08K9/04C08K2003/265
Inventor 柯俊沐白欣陈明鹏刘志鹏陈登龙
Owner QUANGANG PETROCHEM RES INST OF FUJIAN NORMAL UNIV
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