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Fully biodegradable composite material for tableware, preparation method and applications thereof

A composite material and biodegradable technology, which is applied in the field of fully biodegradable composite materials for tableware and its preparation, can solve the problems of poor compatibility and strong hydrophilicity, achieve excellent water resistance, increase carbon content, and excellent reinforcement effect of effect

Active Publication Date: 2020-01-17
佰信(福建)新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] In order to overcome the deficiencies in the prior art, on the one hand the present invention provides a fully biodegradable composite material for tableware with higher tensile strength, elongation at break and good barrier properties by blending PBAT and PLA; On the one hand, the present invention provides a modified biochar based on plant fibers to overcome the problems of poor compatibility and strong hydrophilicity of plant fibers, which not only has excellent interfacial compatibility and interfacial bonding to PBAT and PLA strength, and has excellent reinforcing and strengthening effects on PBAT and PLA blends, increases melt viscosity, and improves the processing and molding stability of PBAT and PLA blends

Method used

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  • Fully biodegradable composite material for tableware, preparation method and applications thereof

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Embodiment 1

[0039] The fully biodegradable composite material for tableware of the present embodiment is prepared by blending and preparing the following components in parts by weight: 20 parts of PBAT, 80 parts of PLA, wherein the total parts by weight of PBAT and PLA is 100 parts, talc 5 parts of powder, 0.5 part of compatibilizer, 0.5 part of lubricant, 0.3 part of end-capping agent, 0.1 part of coupling agent, and prepare according to the following method:

[0040] Put PBAT and PLA in a vacuum oven, and vacuum dry at 40-50°C for 10-12 hours, mix the surface-coupling-treated talc powder, and dried-treated PBAT, PLA, and additives evenly and pass through banburying Machine melt blending, the blending temperature is 180°C, the speed is 40-60r / min, and the blending time is 80-15min, and then transferred to a screw extruder for extrusion, granulation, and drying to obtain fully biodegradable composites for tableware. Slicing of material.

Embodiment 2

[0042] The fully biodegradable composite material for tableware in this embodiment is prepared by blending the following components by weight: 80 parts by weight of PBAT and 20 parts by weight of PLA, wherein the total weight number of PBAT and PLA is 100 parts. 10 parts of talcum powder, 0.5 part of compatibilizer, 0.5 part of lubricant, 0.2 part of end-capping agent, 0.2 part of coupling agent, and prepared according to the method of Example 1.

Embodiment 3

[0044] The fully biodegradable composite material for tableware of the present embodiment is composed of the following components by weight: 40 parts of PBAT, 60 parts of PAL, 5 parts of surface high-temperature modified biochar, 5 parts of talcum powder, 0.5 part of lubricant, 0.1 part of joint agent, wherein the particle size of the surface high-temperature modified biochar is 150 mesh, and is prepared according to the following method:

[0045] Put PBAT and PLA in a vacuum oven, and vacuum dry at 40-50°C for 10-12 hours, then put the surface-coupling-treated talc powder, and the dried-treated PBAT, PLA, additives and surface high-temperature modification After the biochar is mixed evenly, it is melted and blended by an internal mixer. The blending temperature is 180°C, the rotation speed is 40-60r / min, and the blending time is 80-15min. Then it is transferred to a screw extruder for extrusion, granulation, and drying. Obtain slices of fully biodegradable composites for tabl...

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Abstract

The invention relates to a fully biodegradable composite material for tableware, wherein the fully biodegradable composite material is mainly prepared by blending the following components by weight: 100 parts of a biodegradable matrix resin, 0-40 parts of an inorganic filler, and 0.1-15 parts of an auxiliary agent, and the biodegradable matrix resin is a composition of PBAT and PLA, and in the specific embodiment mode, the composite material is mainly prepared from the following components by weight: 10-90 parts of PBAT, 10-90 parts of PLA, 3-30 parts of talcum powder, 1-20 parts of modified biochar and 0.5-10 parts of an auxiliary agent, the total weight part of PBAT and PLA is 100 parts, the modified biochar is surface high-temperature modified biochar or / and surface coupling modified biochar, and the auxiliary agent is one or a plurality of materials selected from a compatilizer, a lubricant, a chain extender, an end-capping reagent and a coupling agent.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, and in particular relates to a fully biodegradable composite material for tableware and its preparation method and application. [0002] technical background [0003] At present, plastic packaging materials are becoming more and more popular. Plastic packaging materials are mainly made of polyethylene, polyester or polypropylene. The main advantage of plastic containers blown, extruded or injection molded through plastic molds is corrosion resistance. Low cost, easy to carry and diverse shapes, etc. For example, liquid packaging film belongs to soft plastic packaging, which plays an important role in packaging liquid foods such as soy sauce, vinegar, alcohol, non-carbonated beverages, and milk. Film materials used for liquid food packaging should meet the requirements of packaging, printing, processing, storage, transportation and sanitation. The liquid packaging film that can...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L67/04C08K9/04C08K3/34C08K9/00C08K3/04C08K9/06
CPCC08L67/02C08L67/04C08L2201/06C08L2201/08C08K9/04C08K3/34C08K9/00C08K3/04C08K9/06
Inventor 林新华
Owner 佰信(福建)新材料科技有限公司