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A kind of low shrinkage polypropylene material suitable for 3D printing and preparation method

A low-shrinkage polypropylene and 3D printing technology, applied in the field of 3D printing materials, can solve the problems of low dimensional accuracy of printed products, low dimensional accuracy of consumables, and large shrinkage of consumables, etc., to achieve the goal of expanding the scope of use, stable application, and low cost Effect

Active Publication Date: 2022-07-08
东华能源(宁波)新材料有限公司 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the preparation of consumables by melt extrusion, due to the low melt strength and easy crystallization of unmodified polypropylene materials, the dimensional accuracy of the consumables is low, the cross section is elliptical, and the diameter deviation of some areas of the consumables is greater than ± 0.05mm, the shrinkage rate of the consumables is relatively large during the printing process, resulting in warping and deformation of the product, resulting in low dimensional accuracy of the printed product

Method used

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  • A kind of low shrinkage polypropylene material suitable for 3D printing and preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 100 parts of homopolypropylene (brand: T30H, Donghua Energy (Zhangjiagang) New Materials Co., Ltd.), 0.1 part of catalyst dibutyltin dilaurate, 0.2 part of initiator dicumyl peroxide, 2.5 parts of vinyl triethyl Oxysilane, 0.06 part of beta nucleating agent, 10 parts of talc, and 0 part of calcium carbonate were mixed uniformly in a high mixer.

[0045] The mixture is fed through the main feeding port of the twin-screw extruder, and 0.2 parts of stabilizer and 3 parts of glass fiber are added from the side feeding port. After cooling in a water tank and pelletizing by a pelletizer, granular modified Polypropylene material.

[0046] The granular modified polypropylene material is extruded through a single-screw extruder to obtain a filamentous 3D printing polypropylene consumable.

Embodiment 2

[0048] 100 parts of homopolypropylene (brand: S1003, Donghua Energy (Ningbo) New Materials Co., Ltd.), 0.2 parts of catalyst dibutyltin dilaurate, 0.1 part of initiator dicumyl peroxide, 2 parts of vinyl triethyl Oxysilane, 0.06 part of beta nucleating agent, 10 parts of talc, and 5 parts of calcium carbonate are mixed uniformly in a high mixer.

[0049] The mixture is fed through the main feeding port of the twin-screw extruder, and 0.2 parts of stabilizer and 5 parts of glass fiber are added from the side feeding port. After cooling in a water tank and pelletizing by a pelletizer, granular modified Polypropylene material.

[0050] The granular modified polypropylene material is extruded through a single-screw extruder to obtain a filamentous 3D printing polypropylene consumable.

Embodiment 3

[0052] 100 parts of homopolypropylene (brand name: M151H, Donghua Energy (Zhangjiagang) New Materials Co., Ltd.), 0.2 parts of catalyst dibutyltin dilaurate, 0.2 parts of initiator dicumyl peroxide, 2 parts of vinyl triethyl Oxysilane, 0 parts of beta nucleating agent, 5 parts of talc, and 5 parts of calcium carbonate were mixed uniformly in a high mixer.

[0053]The mixture is fed through the main feeding port of the twin-screw extruder, and 0.2 parts of stabilizer and 7 parts of glass fiber are added from the side feeding port. After cooling in a water tank and pelletizing by a pelletizer, granular modified Polypropylene material.

[0054] The granular modified polypropylene material is extruded through a single-screw extruder to obtain a filamentous 3D printing polypropylene consumable.

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Abstract

The invention discloses a low-shrinkage polypropylene material suitable for 3D printing. By mixing a certain mass of polypropylene, a catalyst, an initiator, a silane coupling agent, a beta nucleating agent, talcum powder and calcium carbonate in proportion , through the twin-screw extruder, feed stabilizer and glass fiber at the side feeding port, extrude polypropylene modified material, and finally prepare filamentary printing consumables by 3D printing consumables equipment, which effectively reduces the shrinkage of the material It improves the melt strength of the material and stabilizes the size of the 3D printing consumables; its component raw materials are obtained, the preparation process is easy to operate, the cost is low, and the effect of the obtained 3D printing consumables is good, which greatly expands the polypropylene material. The scope of use makes polypropylene materials widely and stably used in the field of 3D printing, which has strong practicability and wide applicability.

Description

technical field [0001] The invention relates to a 3D printing material, in particular to a low-shrinkage polypropylene material suitable for 3D printing and a preparation method. Background technique [0002] Polypropylene is a non-toxic, odorless, low-density polymer plastic material. It has the characteristics of high strength, high stiffness, high hardness, good heat resistance, excellent processing performance, low price, and excellent comprehensive performance. It can be widely used. Used in life, medical, home appliances, chemical industry, engineering and other fields. [0003] 3D printing technology, also known as additive manufacturing technology, is a technology that uses layer-by-layer printing and continuous layer stacking to construct a three-dimensional entity. [0004] At present, there are many kinds of 3D printing technologies. The printing technologies used in plastic materials mainly include fused deposition printing (FDM), selective laser sintering print...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08K13/04C08K3/34C08K3/26C08K7/14C08K5/14C08K5/5425C08F255/02C08F230/08B33Y70/10
CPCC08K13/04C08K3/34C08K3/26C08K7/14C08K5/14C08K5/5425C08F255/02B33Y70/00C08K2003/265C08L2312/08C08F230/08C08L23/12Y02P20/52
Inventor 王红英汪诗平崔寅鑫陈艺帆王耀华孙灿乾
Owner 东华能源(宁波)新材料有限公司
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