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A kind of biodegradable masterbatch and the biodegradable bopp film containing this biodegradable masterbatch

A biodegradable and thin film technology, applied in the polymer field, can solve the problems of low film strength, incomplete biodegradation, poor thickness uniformity, etc., and achieve the effect of excellent performance and excellent degradation performance.

Active Publication Date: 2017-09-15
ANHUI GUOFENG PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this starch / plastic blend does not achieve true complete biodegradation, it just breaks down the polymer into pieces, which still has a large impact on the environment
Starch degradable film is generally produced by blown film process instead of biaxial stretching process, so the film strength is low and the thickness uniformity is poor
In addition, because the starch content in the film is usually 20%~30%, the transparency and gloss of the film are greatly reduced; at the same time, due to the poor compatibility of starch and plastics, a large amount of plasticizer must be added, so it cannot be in contact with food.
[0003] There are also biodegradable plastics made of polylactic acid (PLA) or PLA / PBAT, but polylactic acid is prone to thermal degradation and its impact strength is low when processed at high temperatures, which reduces the performance of film products; in addition, the raw materials and processing costs of polylactic acid High, can not use the existing processing equipment and processing technology for processing
The melt viscosity of PLA is too thin, and the conductivity is not as good as that of polyester. When using the biaxial stretching process, the existing mature air knife attachment and electrostatic attachment cannot be used, and it is difficult to attach the cast sheet.
In addition, PLA and other thermoplastic biodegradable plastics are highly hydrophilic, and the raw materials are difficult to dry completely. The melt is prone to foaming during extrusion. The film rupture rate is higher when the biaxial stretching process is used, and the surface finish of the film is lower than that of ordinary BOPP films. and BOPET film

Method used

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  • A kind of biodegradable masterbatch and the biodegradable bopp film containing this biodegradable masterbatch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Raw material ratio of degradable masterbatch:

[0033] C16-20 fatty acid cerium salt 0.08%

[0034] C16-20 fatty acid cobalt salt 0.03%

[0035] Nano TiO2 0.1%

[0036] Polyhydroxyalkanoate 2%

[0037] Natural Vegetable Cellulose 30%

[0038] Polypropylene 62%.

[0039] Masterbatch production process: add C16-20 fatty acid cerium salt and C16-20 fatty acid cobalt salt during polymerization, mix the polymerized polypropylene particles with nano-TiO2 and natural plant cellulose, melt extrude, and pelletize into a masterbatch.

[0040] The biodegradable BOPP film is composed of an upper surface layer, a core layer and a lower surface layer, wherein the thickness of the upper and lower surface layers is 1 μm, and the thickness of the core layer is 18 μm; both the upper surface layer and the lower surface layer are made of the above biodegradable masterbatch 1%, anti-blocking agent 3%, the balance is polypropylene; the core layer is made of the above-mentioned biodegra...

Embodiment 2

[0049] Raw material ratio of biodegradable masterbatch:

[0050] C16-20 fatty acid cerium salt 0.085%

[0051] C16-20 fatty acid cobalt salt 0.04%

[0052] Nano TiO2 0.12%

[0053] Polyhydroxyalkanoates 2.5%

[0054] Natural Vegetable Cellulose 33%

[0055] Polypropylene 65%.

[0056]The biodegradable BOPP film is composed of an upper surface layer, a core layer and a lower surface layer. The thickness of the upper and lower surface layers is 0.8 μm, and the thickness of the core layer is 84 μm; 1.2% anti-blocking agent, 3.5% anti-blocking agent, and polypropylene as the balance; the core layer is composed of 1.2% biodegradable masterbatch made above, 2% antistatic agent, and polypropylene as the balance.

[0057] The preparation methods of the biodegradable masterbatch and the biodegradable BOPP film are the same as in Example 1.

Embodiment 3

[0059] Raw material ratio of biodegradable masterbatch:

[0060] C16-20 fatty acid cerium salt 0.09%

[0061] C16-20 fatty acid cobalt salt 0.045%

[0062] Nano TiO2 0.15%

[0063] Polyhydroxyalkanoate 3%

[0064] Natural Vegetable Cellulose 35%

[0065] Polypropylene 68%.

[0066] The biodegradable BOPP film is composed of an upper surface layer, a core layer and a lower surface layer, wherein the thickness of the upper and lower surface layers is 1.2 μm, and the thickness of the core layer is 22.6 μm; the upper surface layer and the lower surface layer are made of the above-mentioned biodegradable 1% masterbatch, 3.5% anti-blocking agent, and polypropylene as the balance; the core layer is composed of 1% biodegradable masterbatch made above, 2% antistatic agent, and polypropylene as the balance.

[0067] The preparation methods of the biodegradable masterbatch and the biodegradable BOPP film are the same as in Example 1.

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Abstract

The invention provides a biodegradable master batch and a biodegradable BOPP (Biaxially Oriented Polypropylene) film containing the biodegradable master batch. The biodegradable master batch is prepared from C16-20 fatty acid cerium salts, C16-20 fatty acid cobalt salts, nanometer TiO2, polyhydroxy alkanoate, natural plant cellulose and polypropylene. The BOPP film comprises an upper surface layer, a core layer and a lower surface layer, wherein the upper and lower surface layer are both prepared from 1-1.2% of the biodegradable master batch, 3-3.5% of an anti-blocking agent and the balance of polypropylene; and the core layer is prepared from 1-1.2% of the biodegradable master batch, 1-2% of an antistatic agent and the balance of polypropylene. The BOPP film prepared from the biodegradable master batch disclosed by the invention is entirely biodegradable and high in both tensile strength and high in transparency and is safe and reliable.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to a biodegradable masterbatch and a biodegradable BOPP film containing the biodegradable masterbatch. Background technique [0002] At present, the research and development of biodegradable plastics is mainly based on starch-based biodegradable plastics, and the main products are starch products added or blended in polyolefin or polystyrene. However, this starch / plastic blend does not achieve true complete biodegradation, but only breaks down the polymer into pieces, which still has a large impact on the environment. Starch degradable films are generally produced by blown film process instead of biaxial stretching process, so the film strength is low and the thickness uniformity is poor. In addition, because the starch content in the film is usually 20% to 30%, the transparency and gloss of the film are greatly reduced; at the same time, due to the poor compatibility of starch an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L1/02C08L67/04C08K5/098C08K3/22C08J3/22B32B27/08B32B27/32B32B27/20
CPCB32B27/08B32B27/18B32B27/32C08J3/226C08J2323/12C08K2201/005C08K2201/011C08K2201/014C08L23/12C08L2201/06C08L2201/10C08L2203/16C08L2205/03C08L1/02C08L67/04C08K13/02C08K5/098C08K2003/2237
Inventor 陈铸红汪中祥孙善卫王红兵朱峰
Owner ANHUI GUOFENG PLASTIC