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Natural fiber and polylactic acid fiber blended fibreboard and preparation method thereof

A polylactic acid fiber and natural fiber technology, applied in the field of polymer materials and composite materials, can solve problems such as difficulty in reducing weight, achieve excellent mechanical properties, good environmental benefits, and avoid pollution and harm to human health.

Active Publication Date: 2013-09-18
TONGJI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary composite structures such as laminates are difficult to reduce weight while meeting product performance and size requirements

Method used

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  • Natural fiber and polylactic acid fiber blended fibreboard and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Mix ramie staple fiber (fiber length 50mm, diameter 60μm, cross-sectional shape is round) and polylactic acid short fiber (fiber length 50mm / denier 1.8D / cross-sectional shape) according to the mass ratio of 4:6. , through carding, laying and needle-punching to make blended fiber felt, the specification is 5000g / m 2 ; Then add a layer with a density of 20g / m on the upper and lower surfaces of the blended fiber mat 2 The pure polylactic acid film is used as the surface layer; after the billet is assembled, it is placed in a 180°C vacuum oven to preheat for 10 minutes, and then quickly moved to the forming mold, and then it is air-pressed at 0.6MPa and then cooled and shaped at 40°C.

[0029] According to the standards GB / T1447-2005, GB / T1449-2005 and ASTM D256-2010, perform performance tests respectively. After testing, the prepared natural fiber and polylactic acid fiber blended fiberboard has a tensile strength of 78.82MPa, a bending strength of 69.98MPa, and an impact...

Embodiment 2

[0031] Mix jute short fibers (fiber length 80mm, diameter 25μm, polygonal cross-section) and polylactic acid short fibers (fiber length 80mm / denier 1D / cross-section polygonal) in a mass ratio of 1:1, after carding, Laying netting and needle punching to make blended fiber felt with a specification of 1000g / m 2 ; Then add a layer with a density of 500g / m on the upper and lower surfaces of the blended fiber mat 2 The polylactic acid non-woven fabric is used as the surface layer; after the billet is assembled, it is placed in a vacuum oven at 150°C for preheating for 20 minutes, and then quickly moved to the forming mold.

[0032] According to the standards GB / T1447-2005, GB / T1449-2005 and ASTM D256-2010, perform performance tests respectively. After testing, the prepared natural fiber and polylactic acid fiber blended fiberboard has a tensile strength of 36.05MPa, a bending strength of 24.61MPa, and an impact strength of 104.94J / m.

Embodiment 3

[0034] Mix flax staple fiber (fiber length 20mm, diameter 17μm, cross-sectional shape is polygonal) and polylactic acid short fiber (fiber length 20mm / denier 4D / cross-sectional shape is Y-shaped) according to the mass ratio 6:4, after carding, Laying and needle-punching to make blended fiber felt with a specification of 1900g / m 2 ; Add a layer of PBAT-modified polylactic acid-based film on the upper and lower surfaces of the blended fiber felt (area density 50g / m 2 ) as the surface layer; after forming the billet, put it in a vacuum oven at 175°C for 15 minutes to preheat, then quickly move it to the forming mold, and form it under air pressure at 0.4MPa, then cool and set it at 35°C.

[0035] According to the standards GB / T1447-2005, GB / T1449-2005 and ASTM D256-2010, perform performance tests respectively. After testing, the tensile strength of the prepared natural fiber and polylactic acid fiber blended fiberboard is 51.31MPa, the bending strength is 34.58MPa, and the impac...

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Abstract

The invention relates to a natural fiber and polylactic acid fiber blended fibreboard which consists of an upper polylactic acid surface layer, a lower polylactic acid surface layer and a layer of natural fiber and polylactic acid fiber blended felt clamped between the upper polylactic acid surface layer and the lower polylactic acid surface layer. The natural fiber and polylactic acid fiber blended fibreboard is prepared by uniformly mixing natural fibers and polylactic acid fibers, carding, lapping and puncturing the mixed fibers to prepare the natural fiber and polylactic acid fiber blending felt, then adding the upper and lower polylactic acid surface layers on the outer layer of the natural fiber and polylactic acid fiber blended felt, preheating the mixture in a vacuum baking oven, transferring a product into a forming die, and forming the natural fiber and polylactic acid fiber blended fibreboard by an air pressure forming method. The natural fiber and polylactic acid fiber blended fibreboard has high environment benefit and high mechanical property and is suitable for the fields of airplanes, automobile inner decorations and the like.

Description

Technical field [0001] The invention relates to a fiber board blended with natural fiber and polylactic acid fiber and a preparation method thereof, and belongs to the field of polymer materials and composite materials. Background technique [0002] Polylactic acid (PLA) is derived from renewable biomass resources (such as cassava, sweet sorghum, straw, etc.). Its most prominent advantage is biodegradability. Its widespread use can also alleviate the sustainable development problems currently faced by the world - -The oil crisis and greenhouse effect can also alleviate the problem of the future of our agricultural products for our country. Because polylactic acid has good thermoplasticity, fiber-forming properties, and high transparency, some of its properties are better than existing general plastics such as polyethylene, polypropylene, and polystyrene. Therefore, it has been globally recognized as the most promising plastic in the new century. [0003] Natural fibers com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/12B29C70/42
Inventor 任杰陈勰张乃文顾书英李建波
Owner TONGJI UNIV
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