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Degradable film and preparation method thereof

A technology for degrading films and fats, applied in the field of degradable films and preparation, can solve the problems of water resistance, biodegradability and toughness of films that cannot be optimized at the same time, achieve efficient dispersion and activation, improve biodegradability, and inhibit aggregation. effect of the phenomenon

Inactive Publication Date: 2019-02-22
长沙浩然医疗科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a degradable film and its preparation method, so as to solve the limitations of existing films such as the inability to simultaneously optimize water resistance, biodegradability, and toughness.

Method used

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Examples

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Effect test

preparation example Construction

[0027] In an embodiment of the present invention, the preparation method of the degradable film comprises the following steps:

[0028] S1. Weigh raw materials according to the following parts by weight: 30-50 parts of polyethylene, 35-50 parts of polylactic acid, 40-50 parts of corn starch, 10-15 parts of polynaphthalene sulfonate, fatty alcohol polyoxyethylene ether ammonium sulfate 9-14 parts, 4-8 parts of acrylate, 30-48 parts of water;

[0029] The polynaphthalene sulfonate includes one or more of polynaphthalene sulfonate sodium salt, polynaphthalene sulfonate potassium salt, and polynaphthalene sulfonate ammonium salt.

[0030] S2. Stir polyethylene, polylactic acid, cornstarch, and water evenly in proportion by weight to prepare mixture A;

[0031] S3. Combine the prepared A mixture with polynaphthalene sulfonate, fatty alcohol polyoxyethylene ether sulfuric acid, and acrylate at a temperature of 80-90° C., a rotating speed of 200-250 r / min, and a magnetic field stren...

Embodiment 1

[0034] A method for preparing a degradable film, comprising the steps of:

[0035] S1. Weigh raw materials according to the following parts by weight: 36 parts of polyethylene, 41 parts of polylactic acid, 42 parts of corn starch, 11 parts of polynaphthalene sulfonate, 10 parts of fatty alcohol polyoxyethylene ether ammonium sulfate, 4 parts of acrylate, 33 parts of water;

[0036] The polynaphthaldehyde sulfonate is sodium polynaphthaldehyde sulfonate.

[0037] S2. Stir polyethylene, polylactic acid, cornstarch, and water evenly in proportion by weight to prepare mixture A;

[0038] S3. Combine the prepared A mixture with polynaphthalene sulfonate, fatty alcohol polyoxyethylene ether sulfuric acid, and acrylate at a temperature of 81°C, a rotating speed of 228r / min, and a magnetic field strength of 1650H, and the magnetic field line and stirring It was prepared by stirring the stick at right angles and vertically for 15 minutes.

[0039] S4. Blow the modified mixed material ...

Embodiment 2

[0041] A method for preparing a degradable film, comprising the steps of:

[0042] S1. Weigh raw materials according to the following parts by weight: 46 parts of polyethylene, 48 parts of polylactic acid, 45 parts of cornstarch, 12 parts of polynaphthalene sulfonate, 13 parts of fatty alcohol polyoxyethylene ether ammonium sulfate, 6 parts of acrylate, 45 parts of water;

[0043] The polynaphthalene sulfonate is potassium polynaphthaldehyde sulfonate.

[0044] S2. Stir polyethylene, polylactic acid, cornstarch, and water evenly in proportion by weight to prepare mixture A;

[0045] S3. Combine the prepared A mixture with polynaphthalene sulfonate, fatty alcohol polyoxyethylene ether sulfuric acid, and acrylate at a temperature of 87°C, a rotational speed of 239r / min, and a magnetic field strength of 1941H, and the magnetic field line and stirring It was prepared by stirring the stick at right angles and vertically for 23 minutes.

[0046] S4. Blow the modified mixed materi...

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PUM

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Abstract

The invention discloses a degradable film and a preparation method thereof. The degradable film comprises the following raw materials: polyethylene, polylactic acid, corn starch, polynaphthalene formaldehyde sulfonate, fatty alcohol polyoxyethylene ether ammonium sulfate, acrylate and water. The degradable film is prepared by the steps: carrying out burdening, mixing and uniform stirring to prepare a mixed material A; modifying the mixed material A to prepare a modified mixed material, and blowing the modified mixed material by using a plastic film blowing machine. The preparation method disclosed by the invention is simple in preparation process, and the degradable film disclosed by the invention is good in water resistance, high in biodegradability and good in toughness.

Description

technical field [0001] The invention belongs to the field of degradable films, in particular to a degradable film and a preparation method. Background technique [0002] Plastics are widely used, such as plastic toys, plastic bottles, plastic packaging, plastic bags, etc. We cannot live without plastics. Studies have found that plastic products produced from polylactic acid resin can be completely degraded into carbon dioxide and water in a composting environment. Moreover, polylactic acid resin has good compatibility, transparency, solvent resistance and biaxial stretching properties, etc., and can be processed in a variety of ways. At present, the more common plastic products at home and abroad are disposable cups, knives and forks, plates, Plastic bags, non-woven fabrics, etc., theoretically as long as they are plastic products, can be made of this bioplastic material. However, as we all know, ordinary PP / PE plastics are difficult to decompose in the natural environment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/02C08L23/06C08L67/04C08L51/08C08L71/02C08L61/00C08J5/18
CPCC08J5/18C08J2303/02C08J2323/06C08J2403/02C08J2423/06C08J2451/08C08J2461/00C08J2467/04C08J2471/02
Inventor 不公告发明人
Owner 长沙浩然医疗科技有限公司
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