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Biodegradable multilayer co-extrusion material and preparation method thereof

A biodegradation and co-extrusion technology, applied in the direction of chemical instruments and methods, layered products, flat products, etc., can solve the problems of preparing different properties and high film costs, and achieve the effect of improving performance and reducing costs

Active Publication Date: 2017-08-11
齐庆德
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are many biodegradable polymer materials that have been industrialized and gradually promoted and used in the world, but biodegradable materials have their own advantages and disadvantages in terms of performance. Different products require different performance requirements and uses. The current biodegradable The cost of membranes prepared from materials is relatively high, and there is no method to prepare biodegradable materials with different properties according to different needs

Method used

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  • Biodegradable multilayer co-extrusion material and preparation method thereof
  • Biodegradable multilayer co-extrusion material and preparation method thereof
  • Biodegradable multilayer co-extrusion material and preparation method thereof

Examples

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preparation example Construction

[0056]The preparation method of biodegradable three-layer co-extrusion material comprises the following steps:

[0057] (1) Weigh the component raw materials of the two surface layer functional layers, enter the respective mixing hoppers according to the set ratio, mix and stir evenly, and then enter the respective single-screw extrusion with exhaust function In the machine, it is melted and plasticized at a temperature of 140-230°C and exhausted, and then extruded into the first and third flow channels of the die head;

[0058] (2) Weigh the component raw materials of the middle layer, enter them into the mixing hopper according to the set ratio, mix and stir evenly, and then enter into the twin-screw extruder with exhaust function, at 140-230°C After melting and plasticizing at high temperature and exhausting, it is extruded into the middle layer flow channel of the die;

[0059] (3) The raw materials in the above three layers are melted and extruded to a die head with a te...

Embodiment 1

[0073] In this example, a biodegradable three-layer co-extruded biaxially oriented synthetic paper with a thickness of 35 μm is used as an example product.

[0074] see figure 1 and 3 As shown, the upper surface functional layer is a resin layer, and its components are: polylactic acid resin PLA (MFI (melt flow index): 3.5) 79.0% (wt%), polybutylene adipate-terephthalate Butylene glycol formate PBAT (MFI: 3.0) 20% (wt%), antioxidant 1.0% (wt%). After the raw materials in the upper surface functional layer are mixed evenly according to the above ratio, they enter the single-screw extruder 4 with exhaust function, melt and plasticize at a temperature of 160-200°C, and then extrude into the into the first flow channel of the die head.

[0075] The middle layer 2 is a foam layer, and its components are: polylactic acid resin (MFI: 3.5) 40% (wt%), polylactic acid degradable composite masterbatch containing 70% calcium carbonate (average particle size 3.0μm) 58% (wt%), antistati...

Embodiment 2

[0082] In this embodiment, a biodegradable three-layer co-extruded biaxially oriented film with a thickness of 19 μm for printing and lamination is used as an example product.

[0083] see figure 1 As shown, the upper surface functional layer is a resin layer, and its components are: polybutylene succinate (PBS) (MFI: 3.0) 98.0% (wt%), anti-blocking agent 2.0% (wt%). After the raw materials in the functional layer on the upper surface are mixed evenly according to the above ratio, they enter the single-screw extruder with exhaust function, melt and plasticize at a temperature of 170-200°C and exhaust, and then extrude into the mold. In the first layer of the flow channel of the head.

[0084] The middle layer 2 is a resin layer, and its components are: polybutylene succinate (PBS) (MFI: 3.0) 98% (wt%), antistatic agent 2.0% (wt%). After the raw materials in the middle layer are mixed evenly according to the above ratio, they enter the twin-screw extruder with exhaust functio...

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Abstract

The invention provides a biodegradable multilayer co-extrusion material. The material is characterized by comprising two surface functional layers and a middle layer located between the two surface functional layers, components of the surface functional layers and the middle layer include biodegradable materials, and the biodegradable materials refer to one or more of polybutylene succinate, polylactic acid, polyhydroxyalkanoate and polybutylene adipate-polybutylene terephthalate. The invention further discloses a preparation method of the material. The biodegradablity of four selected master batches of the multilayer co-extrusion material is good, and adopted inorganic minerals are natural, so that the co-extrusion material has completely biodegradable properties and can be widely used in various types of food packages, medical products, environmental protection labels, advertisements and all kinds of environmental-protection products.

Description

technical field [0001] The invention relates to the technical field of degradable materials, in particular to a biodegradable multi-layer co-extrusion material and a preparation method. Background technique [0002] As a safe, durable and low-cost product, plastic is widely used in various fields all over the world. According to statistics, the total global plastic production in 2015 has exceeded 300 million tons. But since plastic is mainly extracted from petroleum, the resource is non-renewable. At the same time, synthetic plastic resins extracted from petroleum, such as polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), etc., are often discarded after being discarded. It cannot be decomposed under natural conditions, causing serious burden and pollution to the environment. According to statistics, tens of millions of tons of plastics and their products are discarded in the natural environment every year, and these plastic wastes will not ...

Claims

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Application Information

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IPC IPC(8): B32B27/08B32B27/20B32B27/36B32B27/28B32B33/00C08L67/04C08L67/02C08K3/26B29C69/02B29C47/92B29C47/06B29C47/56B29C55/02B29L7/00B29C48/92
CPCB29C48/0018B29C48/08B29C48/21B29C48/49B29C48/92B29C55/023B29C2948/92704B29L2007/002B32B27/08B32B27/20B32B27/28B32B27/36B32B33/00C08L67/02C08L67/04C08L2201/06C08L2205/025C08K2003/265
Inventor 齐庆德
Owner 齐庆德
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