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Toughened polylactic acid material for additive manufacturing

A polylactic acid material and additive manufacturing technology, applied in the field of polylactic acid materials and toughening polylactic acid materials, can solve the problems of low surface gloss and insufficient toughness, and achieve high surface gloss, good fluidity and improved mechanical properties. Effect

Inactive Publication Date: 2018-06-22
诺思贝瑞新材料科技(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the extruded products of existing polylactic acid materials have low surface gloss, insufficient toughness, and require two-step extrusion to produce

Method used

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  • Toughened polylactic acid material for additive manufacturing
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  • Toughened polylactic acid material for additive manufacturing

Examples

Experimental program
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Effect test

Embodiment 1

[0031] The polylactic acid and styrene / acrylic acid polymers were respectively placed in an airflow drying oven, and dried at 65° C. for 4 hours to ensure that their moisture content was controlled below 0.05%. Place the polyurethane elastomer in a vacuum oven at 70°C to dry for 4 hours to ensure that its moisture content is also controlled below 0.05%.

[0032] Then the dried polylactic acid, styrene / acrylic acid polymer, and polyurethane elastomer are proportioned according to the weight percentage of the entire polylactic acid material obtained, wherein 90% of polylactic acid PLA and 8% of polyurethane elastomer TPU are put into high-mixing Mix in the machine at low speed for 10 seconds, and the mixing temperature does not exceed 50°C. After mixing, add diffuser oil DSP 0.2% and mix at low speed for 5 seconds. Observe that the material particles are evenly covered with dispersing oil, and then add styrene / acrylic acid polymer ADR 0.1%, hindered phenolic antioxidant 1010 0.2...

Embodiment 2

[0036] The polylactic acid and styrene / acrylic acid polymers were respectively placed in an airflow drying oven, and dried at 65° C. for 4 hours to ensure that their moisture content was controlled below 0.05%. Place the polyurethane elastomer in a vacuum oven at 70°C to dry for 4 hours to ensure that its moisture content is also controlled below 0.05%.

[0037]The dried materials of polylactic acid, styrene / acrylic acid polymer and polyurethane elastomer are proportioned according to the weight percentage of the whole polylactic acid material, among which polylactic acid PLA75% and polyurethane elastomer TPU22% are put into the high mixer Mix at medium and low speed for 15 seconds, and the mixing temperature does not exceed 50°C. After mixing, add 0.3% dispersing oil DSP and mix at low speed for 15 seconds, and observe that the material particles are evenly covered with dispersing oil. Then put styrene / acrylic acid polymer ADR 0.3%, hindered phenolic antioxidant 1010 0.2%, su...

Embodiment 3

[0041] The polylactic acid and styrene / acrylic acid polymers were respectively placed in an airflow drying oven, and dried at 65° C. for 4 hours to ensure that their moisture content was controlled below 0.05%. Place the polyurethane elastomer in a vacuum oven at 70°C to dry for 4 hours to ensure that its moisture content is also controlled below 0.05%.

[0042] The dry materials of polylactic acid, styrene / acrylic acid polymer and polyurethane elastomer are proportioned according to the weight percentage of the whole polylactic acid material, among which polylactic acid PLA88% and polyurethane elastomer TPU 9% are put into high-mixing Mix in the machine at low speed for 15 seconds, and the mixing temperature does not exceed 50°C. After mixing, add dispersing oil DSP 0.2% and mix at low speed for 15 seconds, and observe that the material particles are evenly covered with dispersing oil. Then put in styrene / acrylic acid polymer ADR 0.3%, hindered phenolic antioxidant 1010 0.2%,...

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Abstract

The invention relates to a toughened polylactic acid material for additive manufacturing. The toughened polylactic acid material comprises the following components in percentage by weight: 75-90% of polylactic acid, 8-22% of a polyurethane elastomer, 0.1-0.3% of styrene / acrylic acid polymer, 0.2-0.4% of a hindered phenol antioxidant, 0.2-0.4% of a sulfur-containing auxiliary antioxidant, 0.1-0.3%of a benzophenone ultraviolet absorber, 1-2% of a lubricant and 0.2-0.3% of diffusion oil. The toughened polylactic acid material provided by the invention has the beneficial effects that the toughness of the obtained polylactic acid material is greatly improved and the elongation at break is greatly improved by adjusting the contents of the polyurethane elastomer and the styrene / acrylic acid polymer and adjusting other components, and the product has high glossiness and shows silk luster, so that the surface quality of the product is not influenced by printing layer lines in a printing process of a wire rod.

Description

technical field [0001] The invention relates to a polylactic acid material, in particular to a toughened polylactic acid material used for additive manufacturing, and belongs to the technical field of polymer material processing. Background technique [0002] Additive Manufacturing (AM) technology, also known as 3D printing, is a technology that uses the method of gradually accumulating materials to manufacture physical parts, and is a "bottom-up" manufacturing method. Due to its excellent performance, polylactic acid was used in the manufacturing process of additive manufacturing earlier, but due to its inherent shortcomings of high brittleness and poor toughness, the application of materials in additive manufacturing is greatly limited. The layer pattern of the product itself manufactured by the additive manufacturing process also leads to poor apparent quality of the product, and the post-processing process of the product surface increases the difficulty of product manufa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L75/04C08L91/06C08L25/08C08K5/372C08K5/3475C08K5/134B33Y70/00
Inventor 梁雪娇茅伟华
Owner 诺思贝瑞新材料科技(苏州)有限公司
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