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Low-shrinkage polypropylene material suitable for 3D printing and preparation method thereof

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: 2019-12-31
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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  • Low-shrinkage polypropylene material suitable for 3D printing and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0044] 100 parts of homopolypropylene (brand name: T30H, Donghua Energy (Zhangjiagang) New Material 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 parts of β-nucleating agent, 10 parts of talcum powder, and 0 parts of calcium carbonate were mixed uniformly in a high mixer.

[0045] Feed the mixture through the main feed port of the twin-screw extruder, add 0.2 parts of stabilizer and 3 parts of glass fiber from the side feed port, cool in the water tank, and pelletize with a pelletizer to obtain granular modified Polypropylene material.

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

Embodiment 2

[0048] 100 parts of homopolypropylene (grade: S1003, Donghua Energy (Ningbo) New Material Co., Ltd.), 0.2 parts of catalyst dibutyltin dilaurate, 0.1 part of initiator dicumyl peroxide, 2 parts of vinyl triethyl Oxysilane, 0.06 parts of β-nucleating agent, 10 parts of talc, 5 parts of calcium carbonate, and mix them evenly in a high mixer.

[0049] Feed the mixture through the main feeding port of the twin-screw extruder, add 0.2 parts of stabilizer and 5 parts of glass fiber from the side feeding port, cool in the water tank, and pelletize with a pelletizer to obtain granular modified Polypropylene material.

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

Embodiment 3

[0052] 100 parts of homopolypropylene (brand: M151H, Donghua Energy (Zhangjiagang) New Material 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 β-nucleating agent, 5 parts of talcum powder, 5 parts of calcium carbonate, mixed evenly in a high mixer.

[0053]Feed the mixture through the main feed port of the twin-screw extruder, add 0.2 parts of stabilizer and 7 parts of glass fiber from the side feed port, cool in the water tank, and pelletize with a pelletizer to obtain granular modified Polypropylene material.

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

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Abstract

The invention discloses a low-shrinkage polypropylene material suitable for 3D printing. The preparation method comprises the following steps: mixing polypropylene, a catalyst, an initiator, a silanecoupling agent, a beta nucleating agent, talcum powder and calcium carbonate according to a certain mass ratio; adopting a double-screw extruder, feeding a stabilizer and glass fibers through side feeding holes at the same time, extruding to obtain a polypropylene modified material, and finally preparing filamentous printing consumable through 3D printing consumable equipment. The shrinkage performance of the material is effectively reduced, the melt strength of the material is improved, and the size of the 3D printing consumable is stabilized; the raw materials are easy to obtain, the preparation process is easy to operate and low in cost, the effect of the prepared 3D printing consumable is good, the application range of the polypropylene material is greatly expanded, the polypropylene material can be widely and stably applied to the field of 3D printing, and the polypropylene material has very high 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 thereof. Background technique [0002] Polypropylene is a non-toxic, odorless, low-density high-molecular plastic material. It has the characteristics of high strength, high rigidity, high hardness, good heat resistance, excellent processing performance, low price, and excellent comprehensive performance. It can be widely used It is widely used in life, medical treatment, household 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 superposition to construct three-dimensional entities, which greatly expands the material forming method, and has the characteristics of high precision and customizable services. [0004] At present, there are m...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08K13/04C08K3/34C08K3/26C08K7/14C08K5/14C08K5/5425C08F255/02C08F230/08B33Y70/00
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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