Method for preparing 3D printing material by use of recycled waste high-density polyethylene plastics

A high-density polyethylene and 3D printing technology, which is applied in recycling technology, plastic recycling, 3D object support structures, etc., can solve the problems of insufficient modification of additives, high price of nanotubes, and high total cost. Enhanced tensile strength and impact strength, low cost, and reduced performance loss

Active Publication Date: 2015-05-20
康硕(河南)智能制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

3D printing technology itself is not complicated, but the available consumables are a difficulty
The disadvantage is that the additives are not fully mixed and contacted with high-density polyethylene, and the modification effect of the additives is not fully exerted. At the same time, the price of nanotubes is relatively expensive, resulting in a higher total cost.

Method used

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  • Method for preparing 3D printing material by use of recycled waste high-density polyethylene plastics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Preparation:

[0033] (1) Take recovered waste milk bottles, medicine bottles, shampoo and shower gel bottles and other HDPE, use a hard plastic crusher to crush them, and then put them into a plastic washing machine for thorough cleaning until there is no obvious dirt residue on the surface. Air-dried to obtain waste high-density polyethylene for use.

[0034] (2) Shred the hemp fiber, soak it in 18% NaOH solution for 2 hours with a temperature of 20° C., take it out, then fully wash it with deionized water, remove residual NaOH, filter out most of the water, and freeze-dry to constant temperature. Heavy standby.

[0035] (3) The discarded high-density polyethylene obtained in steps (1), (2), hemp fiber and other additives are mixed according to the following weight ratio: high-density polyethylene 10kg, hemp fiber 1kg, calcium silicate 1kg, wood Calcium sulfonate 1kg, coupling agent KH-57080g, compatibilizer maleic anhydride 1kg, plasticizer dimethyl phthalate 2kg a...

Embodiment 2

[0038] Preparation:

[0039] (1) Get the discarded high-density polyethylene, hemp fiber and other additives obtained in steps (1) and (2) of Example 1 and mix them in the following weight ratio: 10kg of high-density polyethylene, 2kg of hemp fiber, calcium silicate 2kg, 2kg of calcium lignosulfonate, 100g of coupling agent KH-550, 1kg of maleic anhydride compatibilizer, and 2.5kg of plasticizer dimethyl phthalate are placed in a liquid ammonia low-temperature pulverizer for pulverization, and the pulverization temperature is - 125°C, crushing time 1.5h, crushing fineness 50 mesh.

[0040] (2) Extrude and granulate the mixture powder obtained in step (3) using a twin-screw extrusion molding machine, the head temperature is 120°C, the screw speed is 100r / min, and the toughness, tensile strength and impact strength of the obtained granules are Raw waste high-density polyethylene plastic is stronger and can be used as a 3D printing material.

Embodiment 3

[0042] Preparation:

[0043] (1) Get the discarded high-density polyethylene, hemp fiber and other additives obtained in steps (1) and (2) of Example 1 and mix them by weight: 10kg of high-density polyethylene, 3kg of hemp fiber, lignin sulfonate Calcium acid 3kg, calcium silicate 3kg, coupling agent KH-570110g, maleic anhydride compatibilizer 1kg, plasticizer dimethyl phthalate 3kg are put into the liquid ammonia low-temperature pulverizer for pulverization, pulverization temperature -130 ℃, crushing time 2h, crushing fineness 60 mesh.

[0044](2) Extrude and granulate the mixture powder obtained in step (3) using a twin-screw extrusion molding machine, the head temperature is 125°C, the screw speed is 110r / min, and the toughness, tensile strength and impact strength ratio of the obtained granules are Raw waste high-density polyethylene plastic is stronger and can be used as a 3D printing material.

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Abstract

The invention discloses a method for preparing a 3D printing material by use of recycled waste high-density polyethylene plastics. The raw material adopted by method is the waste high-density polyethylene plastics which are prepared from the following components in parts by weight: 100 parts of high-density polyethylene, 10-40 parts of jute fibers, 10-30 parts of calcium lignosulfonate, 10-30 parts of calciumsilicate, 0.8-1.4 parts of a coupling agent, 10 parts of a compatilizer and 20-30 parts of a plasticizer. The method comprises the following steps: 1, breaking and cleaning the waste plastics; 2, preprocessing the jute fibers; 3, adding additives, and grinding at low temperature; 4, extruding and pelletizing. According to the method, the waste high-density polyethylene plastics are recycled, and the additives are added to modify the recycled plastics and enhance the toughness, tensile strength and impact strength of the plastics, so that the plastics can be accepted as a material meeting 3D printing requirements, and the cost of the 3D printing material is greatly reduced.

Description

technical field [0001] The invention relates to a method for preparing 3D printing materials, in particular to a method for preparing 3D printing materials by recycling waste high-density polyethylene plastics. Background technique [0002] 3D printing, also known as "rapid prototyping technology", realizes the manufacture of three-dimensional objects by laying up printing materials layer by layer. 3D printing technology originated from photographic sculpture and landform modeling technology more than 100 years ago. It took shape in the 1980s. With the development of nearly 30 years, 3D printing technology has advanced by leaps and bounds. At present, mainstream 3D printing technologies mainly include fused deposition rapid prototyping, photocuring molding, and powder bonding molding. With the continuous progress and maturity of 3D printing technology, its application in aerospace, biomedicine, construction and other fields has gradually broadened. Its advantages such as co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L97/02C08K13/02C08K3/34D06M11/38B29B9/06B29C47/92D06M101/06B29C48/92
CPCB29C48/92B29B9/06C08L23/06D06M11/38B29C2948/92704C08L2207/062D06M2101/06B33Y40/10B33Y70/00C08L97/02C08K13/02C08K3/34C08K5/5425C08K5/1539C08K5/12B29B17/0026B29K2023/065Y02W30/62B29C64/35
Inventor 黄丽婕周雷杨莹刘明王晓彤蔡园园黄崇杏农光再王双飞
Owner 康硕(河南)智能制造有限公司
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