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Polycaprolactone multilayer composite degradable packaging film

A polycaprolactone, multi-layer composite technology, applied in the sustainable packaging industry, packaging, wrapping paper, etc., can solve the problems of poor heat resistance and high thermal shrinkage of the film, and achieve increased flexibility, good flexibility and mechanical properties Performance, good heat resistance and effect of heat shrinkage properties

Active Publication Date: 2019-02-12
NANJING COSTAR BIOTECHNOLOGY RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Japanese Patent Laid-Open Publication No. 2004-109000 describes a polyester and glass transition temperature (T g ) is a multilayer film composed of aliphatic resins at 0°C or lower, however, these films have poor heat resistance, resulting in significantly high thermal shrinkage

Method used

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  • Polycaprolactone multilayer composite degradable packaging film
  • Polycaprolactone multilayer composite degradable packaging film
  • Polycaprolactone multilayer composite degradable packaging film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The polycaprolactone multilayer composite degradable packaging film described in this embodiment, such as figure 2 As shown, it consists of four resin layers, and its structure includes a first outer layer 1 and a second outer layer 2 containing biodegradable components, and an inner layer including biodegradable components covering one of the outer layers a3 and inner layer b4. Said inner layer is any layer in a multilayer structure having both major surfaces directly adhered to another layer of the structure and said outer layer is a multilayer structure having one and only one surface adhered to any layer above another layer in the structure.

[0029] Any resin layer of the packaging film is a single polycaprolactone material or a blend of different proportions of polycaprolactone and other resin materials; and each resin layer of the packaging film is from the center to the outer layer, and its polycaprolactone The content of caprolactone changes gradually in the...

Embodiment 2

[0033] The polycaprolactone multi-layer composite degradable packaging film prepared in this embodiment, such as image 3 As shown, it consists of five resin layers, and its structure includes a first outer layer 1 and a second outer layer 2 containing biodegradable components, and three outer layers including biodegradable components covering one of the outer layers Inner layers, namely inner layer a3, inner layer b4 and inner layer c5.

[0034] Any resin layer of the packaging film is a single polycaprolactone material or a blend of different proportions of polycaprolactone and other resin materials; and each resin layer of the packaging film is from the center to the outer layer, and its polycaprolactone The content of caprolactone changes gradually in the form of gradient, and its melting temperature also changes gradually in the form of gradient.

[0035]Put the first outer layer 1 masterbatch component namely the polycaprolactone that contains 80% by weight, the polyval...

Embodiment 3

[0038] The polycaprolactone multi-layer composite degradable packaging film prepared in this embodiment, such as Figure 4 As shown, it consists of six resin layers, and its structure includes a first outer layer 1 and a second outer layer 2 containing biodegradable components, and four outer layers including biodegradable components covering one of the outer layers Inner layers, namely inner layer a3, inner layer b4, inner layer c5 and inner layer d6.

[0039] Any resin layer of the packaging film is a single polycaprolactone material or a blend of different proportions of polycaprolactone and other resin materials; and each resin layer of the packaging film is from the center to the outer layer, and its polycaprolactone The content of caprolactone changes gradually in the form of gradient, and its melting temperature also changes gradually in the form of gradient.

[0040] Put the first outer layer 1 masterbatch component namely the polycaprolactone that contains 95% by wei...

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Abstract

The invention relates to the technical fields of degradable materials and packaging and provides a polycaprolactone multi-layer composite degradable packaging film. The packaging film is composed of four or more resin layers and structurally comprises outer layers containing biodegradable composition, and an inner layer covering one outer layer and containing biodegradable composition. Any resin layer of the packaging film is made of polycaprolactone or a blend of polycaprolactone and other resin materials which are mixed in different proportions; furthermore, the content of polycaprolactone in the resin layers of the packaging film becomes larger gradually in a gradient mode from the center to the outer layer, and melting temperature becomes lower gradually in a gradient mode. A novel structure and a novel mode are adopted for the packaging film, and the packaging film has high heat resistance, thermal shrinkage performance, softness and mechanical performance and can be widely applied to the packaging field.

Description

technical field [0001] The invention relates to the technical fields of degradable materials and packaging, in particular to a polycaprolactone biodegradable packaging film composed of four or more resin layers. Background technique [0002] In the context of serious environmental problems and shortage of petroleum resources, biodegradable plastics have received widespread attention. Among them, polycaprolactone is one of the most popular research and development. The raw materials of polycaprolactone industry are renewable biological materials, and the final products of its degradation are also water and carbon dioxide, which can be completely biodegraded and are one of the most competitive biodegradable materials. [0003] The film products of polycaprolactone and its copolymerization products have broad application prospects in the packaging field. However, there are still many technical difficulties in applying polycaprolactone film to the packaging field. For example...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B65D65/40B32B27/36B32B27/18C08L67/04C08L69/00C08K13/02C08K5/11C08K5/524C08K3/34
CPCY02W90/10
Inventor 唐定良芮桂生李健葛九敢吴华冯玉军林鸿飞
Owner NANJING COSTAR BIOTECHNOLOGY RES INST CO LTD
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