Wood powder modified renewable polyvinyl chloride composition and preparation method thereof

The technology of polyvinyl chloride and the composition is applied in the field of wood powder modified regenerated polyvinyl chloride composition and its preparation field, which can solve the problems of poor product mechanical properties, large difference in bulk density, easy scorching of wood powder, and the like, To achieve the effect of improving adhesion of wood powder and improving lubricating performance

Inactive Publication Date: 2019-05-07
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, through hot pressing, there will be the following problems: 1. The compatibility between wood powder and recycled polyvinyl chloride is poor, and the mechanical properties of the final product are poor; 2. Due to the large difference in bulk density, recycled polyvinyl chloride and wood powder are difficult to mix Evenly; in addition, when the wood powder is mixed, due to the strong shear force when the mixer is mixed, the wood powder is easy to be burnt; 3. Both wood powder and recycled PVC are polar, and the surface of the wood powder has the ability to regenerate Acid that degrades PVC, while recycled PVC produces hydrochloric acid that degrades wood flour

Method used

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  • Wood powder modified renewable polyvinyl chloride composition and preparation method thereof

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Effect test

Embodiment 1

[0034] (1) Take by weighing 100 parts by weight of regenerated polyvinyl chloride and 1 part by weight of ethylene bis-stearamide, add in the mixer, and mix for 2 minutes at 600 rpm;

[0035] (2) Add 25 parts by weight of 150 mesh wood powder, and mix for another 2 minutes at 300 rpm;

[0036] (3) Continue to add 2 parts by weight of polymethylene polyphenylisocyanate, 0.1 parts by weight of antioxidant 1010, and 0.2 parts by weight of antioxidant 168, mix at high speed for 2 minutes, and take it out for later use;

[0037] (4) Pre-compressing in a hot pressing mold, pressure 2MPa, time 10s; hot pressing molding, temperature 160°C, pressure 20MPa, time 5 minutes, to obtain the wood powder modified recycled polyvinyl chloride combination of the present invention The material was injection molded and tested for mechanical properties. The results are shown in Table 1.

Embodiment 2

[0039] (1) Take by weighing 100 parts by weight of regenerated polyvinyl chloride, 2 parts by weight of ethylene bis stearamide, add in the mixer, 800 rpm, mix for 5 minutes;

[0040] (2) Take 40 parts by weight of 120 mesh wood flour, add it to the mixer described in step (1), mix it for 5 minutes at 400 rpm;

[0041] (3) Continue to add 2.5 parts by weight of polymethylene polyphenylisocyanate, 0.1 parts by weight of antioxidant 1010, 0.2 parts by weight of antioxidant 168, and 0.3 parts by weight of antioxidant DSTDP for high mixing for 1 min, and take it out for later use.

[0042] (4) Pre-compressing in a hot-pressing mould, pressure 3MPa, time 30s; hot-pressing, temperature 200°C, pressure 100MPa, time 30 minutes, to obtain the wood powder modified recycled polyvinyl chloride combination of the present invention The material was injection molded and tested for mechanical properties. The results are shown in Table 1.

Embodiment 3

[0044] (1) Take by weighing 100 parts by weight of regenerated polyvinyl chloride and 1 part by weight of ethylene bisstearamide and add it to the mixer, and mix for 5 minutes at 700 rpm;

[0045] (2) Take 55 parts by weight of 130 mesh wood flour, add it to the mixer described in step (1), and continue mixing for 5 minutes at 400 rpm;

[0046] (3) Continue to add 3 wt. parts of polymethylene polyphenylisocyanate, 0.2 wt. parts of antioxidant 1010, 0.3 wt.

[0047] (4) Pre-compressing in a hot-pressing mould, pressure 2.5MPa, time 25s; hot-pressing molding, temperature 180°C, pressure 50MPa, time 10 minutes, the wood flour modified recycled polyvinyl chloride of the present invention is obtained The composition was injection molded and tested for mechanical properties. The results are shown in Table 1.

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Abstract

The invention provides a wood powder modified renewable polyvinyl chloride composition and a preparation method thereof. The wood powder modified renewable polyvinyl chloride composition is prepared from the following components in parts by weight: 100 parts of regenerated polyvinyl chloride, 1-2 parts of ethylene bis stearamide, 25-55 parts of wood flour, 2-3 parts of polymethylene polyphenyl isocyanate and 0.3-0.8 part of an antioxidant. The preparation method comprises the steps of carrying out step-by-step mixing and carrying out hot-press molding. The wood powder modified renewable polyvinyl chloride composition provided by the invention has relatively high tensile strength, elongation at break, bending strength and impact strength, and the mechanical property is excellent.

Description

technical field [0001] The invention belongs to the technical field of modified regenerated polyvinyl chloride, in particular to a wood powder modified regenerated polyvinyl chloride composition and a preparation method thereof. Background technique [0002] The wood flour modified regenerated polyvinyl chloride composition can not only make full use of the regenerated polyvinyl chloride, but also reduce the cost. The application of wood powder in the modified plastics industry is a measure to turn waste into treasure, which can increase farmers' income. [0003] However, through hot pressing, there will be the following problems: 1. The compatibility between wood powder and recycled polyvinyl chloride is poor, and the mechanical properties of the final product are poor; 2. Due to the large difference in bulk density, recycled polyvinyl chloride and wood powder are difficult to mix Evenly; in addition, when the wood powder is mixed, due to the strong shear force when the mi...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08L97/02C08K5/00C08K5/20C08K5/29B29B7/00B29C43/58
Inventor 杨桂生方永炜梁娜宋伟华王华
Owner HEFEI GENIUS NEW MATERIALS
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