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Modified foaming process for reclaimed materials of multilayered co-extruded polypropylene core layer

A technology of co-extrusion core layer and recycled material, applied in the direction of lamination, layered products, lamination devices, etc. Implementation, simple process effect

Active Publication Date: 2014-10-29
惠州市峄董塑胶科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the polypropylene foamed sheet produced by the polypropylene foaming process can be recycled and reproduced. However, due to the existing foam holes in the sheet and various other materials and impurities, the polypropylene foamed sheet must be Recycled materials can only be used again by granulating through a twin-screw granulator, which consumes a lot of energy, and the flexural modulus and tensile modulus of the plates produced by using this kind of recycled materials are also greatly reduced. , the plate becomes brittle, and the other physical performance indicators of the plate also drop significantly, which is obviously worse than that of the plate produced with new materials, so it is necessary to improve it.

Method used

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  • Modified foaming process for reclaimed materials of multilayered co-extruded polypropylene core layer
  • Modified foaming process for reclaimed materials of multilayered co-extruded polypropylene core layer
  • Modified foaming process for reclaimed materials of multilayered co-extruded polypropylene core layer

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Experimental program
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Effect test

Embodiment 1

[0035] A polypropylene multi-layer co-extruded core layer recycled material modified foaming process, comprising the following steps:

[0036] Extrude the upper reinforced plate through the first screw extruder, and the raw materials fed into the first screw extruder include the following components by weight,

[0037] Glass fiber 5~30%

[0038] Antioxidant 1~5%

[0039] Virgin polypropylene balance.

[0040] Extrude the middle foamed sheet through the second screw extruder, and the raw materials input include the components in the following weight ratios,

[0041]

[0042] Extrude the upper reinforced plate through the third screw extruder, and the raw materials fed into the third screw extruder include the following components by weight ratio,

[0043] Glass fiber 5~30%

[0044] Antioxidant 1~5%

[0045] Virgin polypropylene balance.

[0046] The upper reinforced board, the middle foamed board and the lower reinforced board are rolled and composited into a compounde...

Embodiment 2

[0056] This embodiment is an improvement made on the basis of Embodiment 1, and its main steps are the same as Embodiment 1, which will not be repeated here. The difference is that

[0057] A PP surface layer or PU layer is extruded through the fourth screw extruder, and the PP surface layer or PU layer is compounded on the surface of the upper reinforced board through a combination of pressing rollers.

Embodiment 3

[0059] This embodiment is an improvement made on the basis of Embodiment 1, and its main steps are the same as Embodiment 1, which will not be repeated here. The difference is that

[0060] A PP surface layer or PU layer is extruded through the fourth screw extruder, and the PP surface layer or PU layer is compounded on the surface of the upper reinforced board through a combination of pressing rollers.

[0061] A PP surface layer or PU layer is extruded by the fifth screw extruder, and the PP surface layer or PU layer is compounded on the bottom surface of the lower reinforced plate through a combination of pressing rollers.

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Abstract

The invention discloses a modified foaming process for reclaimed materials of a multilayered co-extruded polypropylene core layer. The modified foaming process comprises the following step: extruding an upper-layer intensified sheet material through a first screw rod extruder; and extruding an intermediate foaming sheet material through a second screw rod extruder; extruding an upper-layer intensified sheet material through a third screw rod extruder; and compounding the upper-layer intensified sheet material, the intermediate foaming sheet material and a lower-layer intensified sheet material to form a composite foaming sheet material. The modified foaming process is simple and easy to carry out; the polypropylene foaming materials can be circularly utilized, the energy conservation and the environmental protection are realized, and all physical property indexes of the polypropylene foaming materials are improved.

Description

technical field [0001] The invention relates to the technical field of polypropylene modified foaming technology, in particular to a polypropylene multi-layer co-extruded core layer recycled material modified foaming technology. Background technique [0002] In the prior art, the polypropylene foamed sheet produced by the polypropylene foaming process can be recycled and reproduced. However, due to the existing foam holes in the sheet and various other materials and impurities, the polypropylene foamed sheet must be Recycled materials can only be used again by granulating through a twin-screw granulator, which consumes a lot of energy, and the flexural modulus and tensile modulus of the plates produced by using this kind of recycled materials are also greatly reduced. , the plate becomes brittle, and other physical performance indicators of the plate also drop significantly, which is obviously worse than that of the plate produced by using new materials, so it is necessary t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B37/10B32B37/02C08L23/12C08L23/14C08K7/14C08J3/24
Inventor 张瑞洋
Owner 惠州市峄董塑胶科技有限公司
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