Method for manufacturing fibrilia/polypropylene fiber composite board

A polypropylene fiber and composite sheet technology, which is applied in chemical instruments and methods, textiles and papermaking, lamination devices, etc. Difficult to mix evenly, etc., to reduce the risk of thermal degradation, enhance the effect, and reduce the loss of raw materials

Inactive Publication Date: 2010-03-10
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing extrusion molding process cannot produce the hemp fiber/polypropylene fiber composite plate, and the existing hot pressing process for manufacturing the hemp fiber/polypropylene fiber composite ...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0009] Specific Embodiment 1: The manufacturing method of the hemp fiber / polypropylene fiber composite plate in this embodiment is carried out according to the following steps: 1. Twisting the rough flax fiber into a long line with a diameter of 0.2-2.0 mm to obtain a flax rope; Propylene tear film strips are combed into filaments with a width of 1 to 6 mm to obtain polypropylene threads; 3. Weave linen rope and polypropylene threads into sheets with a thickness of 1 to 6 mm according to a weight ratio of 6 to 9: 1 to 4. After stacking, cover the upper and lower surfaces with a steel plate, then place a spacer between the upper and lower steel plates, place it in a hot press, pressurize to 2-6MPa at 170-185°C, keep it for 4-20min, and then unload it. Press it, take it out together with the steel plate, then place it in a cold press, pressurize it to 1-3 MPa at 30-80 ° C, cool and shape it, and then get the hemp fiber / polypropylene fiber composite board.

[0010] The four sides...

specific Embodiment approach 2

[0014] Embodiment 2: This embodiment differs from Embodiment 1 in that in step 1, rough flax fibers are twisted into long wires with a diameter of 0.5-1.5 mm. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0015] Embodiment 3: The difference between this embodiment and Embodiment 1 is that in step 1, rough flax fiber is twisted into a long line with a diameter of 1 mm. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

The invention relates to a method for manufacturing a composite board, in particular to a method for manufacturing a fibrilia/polypropylene fiber composite board. The invention aims at solving the problems that the fibrilia/polypropylene fiber composite board can not be manufactured by the existing extrusion molding process, and various defects in the existing hot pressing technology for manufacturing the fibrilia/polypropylene fiber composite board, such as the difficulty for evenly mixing raw materials, lowered material performance, small the proportion of the plant fiber material and increased cost. The method comprises the following steps: firstly, entwisting the rough flax fiber into long lines to obtain flax ropes; secondly, carding a polypropylene lacerated film long stripe into a filament yarn to obtain polypropylene silk yarn; and thirdly, weaving the flax ropes and the polypropylene silk yarn into pieces, performing hot pressing to the pieces after being covered by a steel plate, taking out together with the steel plate after pressure relief, and putting the pieces to a cold press for cooling and molding to obtain the fibrilia/polypropylene fiber composite board. In the invention, the dispersible uniformity of the raw material is good, the performance enhanced effect of the board is good, the highest proportion of the plant fiber material in the product is 90 percent,the consumption of polypropylene is reduced, and the production cost is reduced.

Description

technical field [0001] The invention relates to a method for manufacturing a composite board. Background technique [0002] Combining natural biomass fiber materials with thermoplastics to make composite materials is a good way to effectively utilize agricultural plant resources. Compared with conventional wood-based panels, this material has the advantages of high strength, aging resistance, and strong water resistance, and is suitable for various indoor and outdoor use conditions. At present, the main raw material of biomass fiber polymer composites is wood powder or wood fiber, and the main processing method is extrusion, which is similar to plastic processing. There are many limiting factors in extrusion molding. 1. Due to the limitation of equipment, the width of the extruded sheet cannot be too wide, generally not exceeding 40cm; 2. It is difficult to extrude large particle size raw materials, and plant fiber raw materials are generally in the range of 40 to 100 mesh....

Claims

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Application Information

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IPC IPC(8): B32B15/14B32B5/10B32B37/06B32B37/10D04C1/02
Inventor 王伟宏张晨夕袁森林王清文王海刚宋永明
Owner NORTHEAST FORESTRY UNIVERSITY
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