Method for preparing polypropylene and rice hull powder foamed composite tray

A technology of rice husk powder and polypropylene, which is applied in the field of preparation of polypropylene rice husk powder foamed composite trays, can solve problems such as uneven mixing, and achieve the effects of bright colors, smoother product surfaces, and smoother product surfaces

Active Publication Date: 2014-05-07
江苏力达塑料托盘制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mix plant fiber, resin and additives and then extrude and granulate. Although this method is simple, the plant fiber stays in the extruder for too long and it is easy to degrade and the mixing is uneven.

Method used

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  • Method for preparing polypropylene and rice hull powder foamed composite tray
  • Method for preparing polypropylene and rice hull powder foamed composite tray
  • Method for preparing polypropylene and rice hull powder foamed composite tray

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preparation example Construction

[0029] The preparation method of the present invention comprises the following processing steps:

[0030] 1) According to the weight ratio of the composite material, polypropylene, rice husk powder, and nano-calcium carbonate are used as raw materials, and the rice husk powder is dried at 105°C for 24 hours to obtain dried raw materials for use;

[0031] 2) Preparation of polypropylene / rice husk powder blended particles: first, add rice husk powder, nano-calcium carbonate, and compatibilizer into the high-mixer, stir well and set aside; then add polypropylene, high-density polyethylene, flow aid The agent is mixed uniformly in a high mixer and then used for later use. The above compound is heated, melted, kneaded, sheared and extruded in a twin-screw extruder, and then extruded to granulate, wherein the polypropylene, high density polypropylene Ethylene and flow aid blend are added at the main feeding port of the extruder, and the rice husk powder, nano-calcium carbonate, and ...

Embodiment 1

[0034] Prepare raw materials: 100 parts of polypropylene, 25 parts of high-density polyethylene, 20 parts of 80-mesh rice husk powder, 2.5 parts of nano-calcium carbonate, 5 parts of compatibilizer MAH-g-PP, 4 parts of color masterbatch, foaming agent 1.5 parts of nitrogen dicarboxamide, 0.1 part of nano zinc oxide as a foaming aid, and 1 part of glyceryl stearate as a flow aid.

[0035] Add rice husk powder, nano-calcium carbonate, and compatibilizer into the high-mixer, stir evenly and set aside; mix polypropylene, high-density polyethylene, color masterbatch, and flow aid in the high-mixer evenly, and set aside The above-mentioned mixture is heated and melted, kneaded, sheared, extruded in a twin-screw extruder, and then extruded and granulated, wherein the blend of polypropylene, high-density polyethylene, color masterbatch, and flow aid Add at the main feed port of the extruder, and the rice husk powder, nano-calcium carbonate, compatibilizer blend are added at the side f...

Embodiment 2

[0042] Prepare raw materials: 100 parts of polypropylene, 15 parts of high-density polyethylene, 25 parts of 80-mesh rice husk powder, 3 parts of nano-calcium carbonate, 6 parts of compatibilizer titanate coupling agent, 4 parts of color masterbatch, foaming agent 1.5 parts of sodium bicarbonate, 0.1 part of nano zinc oxide as a foaming aid, and 1 part of polyethylene wax as a flow aid.

[0043] Add rice husk powder, nano-calcium carbonate, and compatibilizer into the high-mixer, stir evenly and set aside; mix polypropylene, high-density polyethylene, color masterbatch, and flow aid in the high-mixer evenly, and set aside The above-mentioned mixture is heated and melted, kneaded, sheared, extruded in a twin-screw extruder, and then extruded and granulated, wherein the blend of polypropylene, high-density polyethylene, flow aid, etc. is extruded The main feeding port of the extruder is added, and the rice husk powder, nano-calcium carbonate, and compatibilizer blend are added a...

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Abstract

The invention provides a method for preparing a polypropylene and rice hull powder foamed composite tray. The tray comprises a tray body, wherein the tray body is formed through blending the following materials in parts by weight and then carrying out injection molding: 90-100 parts of polypropylene, 20-30 parts of rice hull powder, 5-35 parts of high density polyethylene, 2-5 parts of nano calcium carbonate, 4-7 parts of compatibilizer, 0.5-2 parts of foamer, 0.1-0.2 part of foaming auxiliaries, 3-8 parts of color master batch and 0.5-1 part of flow auxiliaries. According to the method, due to a composite material, the problem that polypropylene melt is low in strength and poor in foaming ability is better solved, and the prepared composite material has the advantages of good mechanical properties, light weight, low shrinkage, easiness in processing, uniformity in mixing, recyclability and the like and can meet the use requirements of different industries for trays.

Description

technical field [0001] The invention relates to the technical field of trays and manufacturing techniques thereof, in particular to a method for preparing polypropylene rice husk powder foamed composite trays. Background technique [0002] There is a "green wave" in the world today, and environmental issues have become a topic of common concern in all countries. It has become a development trend to change the traditional manufacturing mode, develop green materials, and produce products that protect the environment. The vast majority of polymer materials come from non-renewable resources such as petroleum, and these resources will be depleted in the last few decades. People are surprised to find that adding plant fibers such as wood flour, rice straw, flax, and corn starch to thermoplastic or thermosetting plastics can obtain new composite materials and become recycled wood-plastic composite materials. First of all, it has been promoted and used in developed countries such ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L97/02C08L23/06C08K3/26C08J9/08C08J9/10
CPCC08J9/0061C08J9/08C08J9/103C08J2323/12C08K2201/011C08L23/12C08L2203/14C08L2205/025C08L2205/03C08L2205/035C08L2207/062C08L97/02C08L23/06C08K2003/265C08L51/06
Inventor 蔡涛涛赵航周晓东刘涛周继波周玉娟石广钦李莹
Owner 江苏力达塑料托盘制造有限公司
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