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A kind of polypropylene physical foam composite board and its manufacturing process

A technology of physical foaming and manufacturing process, which is applied in the field of plastic foaming and compounding, can solve the problems of fast burning speed, insufficient strength and corrosion in case of fire, and achieve the effects of simple production process, slow burning speed and good heat resistance.

Active Publication Date: 2016-02-24
徐晓冰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The manufacturing process is relatively simple, but the expansion ratio of chemical foamed polypropylene is relatively low, generally only 1 to 5 times, and there are usually chemical residues in this type of foaming materials, which are harmful to the human body and other metal materials. Corrosion can limit its application
[0004] In addition, the foamed composite boards in the prior art are usually coated with glue on the decorative paper and then bonded with the polyurethane (PU) foam layer. Due to insufficient strength, another layer of glass fiber layer needs to be bonded.
This kind of foamed composite board is complicated in technology, needs more than five processes, and can be pressed and formed after secondary hot pressing, which consumes time and energy, increases labor costs, and the product has weak support and burns quickly in case of fire; due to production Glue is added to the process, which contains excessive formaldehyde and benzene, which is extremely harmful to the human body

Method used

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  • A kind of polypropylene physical foam composite board and its manufacturing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The manufacturing process of a kind of polypropylene physical foaming composite plate that present embodiment provides, such as figure 1 As shown, the equipment adopts a single-screw extruder 1 with a length-to-diameter ratio of 36:1 and ten stages of heating temperature. , 230°C, 220°C, 208°C; gas injection pressure requirements: inject liquid additives in the third section 2, the pressure is: 10MPa, inject nitrogen in the sixth section 3, the pressure is: 25MPa; The formula is as follows by weight percentage: 93% polypropylene, the model is Yangzi Petrochemical F401, the compatibilizer is 3%, the model is Nanjing Huadu Technology Industry Co., Ltd. HD900P, the nucleating agent is 2%, the model is Nanjing Huadu Technology Industry Co., Ltd. HD101 , No. 15 white oil 2%; the composite fabric on both sides of the foam layer is flannelette.

[0031] With the above-mentioned equipment and setting process, the foaming material is extruded through the mold and directly extru...

Embodiment 2

[0033] The process parameters of this embodiment are the same as those of Example 1, the difference being that the formula of the foamed layer is different, and the formula of the foamed layer is as follows by weight percentage: 90% polypropylene, the model is Yangzi Petrochemical F401, 8% compatibilizer, The model is Nanjing Huadu Technology Industry Co., Ltd. HD900P, nucleating agent 1%, the model is Nanjing Huadu Technology Industry Co., Ltd. HD101, No. 15 white oil 1%; the composite fabric on both sides of the foam layer is fleece.

[0034] Using the above-mentioned equipment and setting process, the foaming material is extruded through the mold and directly extruded onto the roller located on the velvet cloth, and is extruded and shaped by the upper and lower rollers. The foaming degree of the finished product reaches 75%. The 2.5mm thick double suede PP foam composite board has 2-3 times the tensile strength and 1.5-3 times the bending strength of the traditional foam com...

Embodiment 3

[0036] The process parameters of this embodiment are the same as the process parameters of Example 1, the difference is that the formula of the foam layer is different, and the formula of the foam layer is as follows in percentage by weight: polypropylene 96%, the model is Yangzi Petrochemical F401, compatibilizer 2%, The model is Nanjing Huadu Technology Industry Co., Ltd. HD900P, the nucleating agent is 1.2%, the model is Nanjing Huadu Technology Industry Co., Ltd. HD101, No. 15 white oil 0.8%; the composite fabric on both sides of the foam layer is flannelette.

[0037] Using the above-mentioned equipment and setting process, the foaming material is extruded through the mold and directly extruded onto the roller located on the velvet cloth, and is extruded and shaped by the upper and lower rollers. The foaming degree of the finished product reaches 83%. The 5.5mm thick double suede PP foam composite board has 4-5 times the tensile strength and 2.5-4 times the bending strengt...

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Abstract

The invention relates to a polypropylene physical foam composite board and its manufacturing process, comprising a foam layer and fabrics compounded on both sides of the foam layer, the foam layer is a polypropylene physical foam layer, the physical foam The formula of the bubble layer is as follows by weight percentage: 90% to 96% of polypropylene; 3% to 8% of compatibilizer; 0.9% to 1.5% of nucleating agent; 0.5% to 2% of liquid additive. In the hot state, due to the action of the compatibilizer, the polypropylene foam layer and the outer decorative layer can be directly compounded at one time without any glue containing harmful substances; and the foam layer is made of a new type of polypropylene material , using physical foaming technology without any chemical residue.

Description

technical field [0001] The invention relates to a foamed composite board and a manufacturing process thereof, in particular to a polypropylene physical foamed composite board and a manufacturing process thereof, belonging to the technical field of plastic foamed composites. Background technique [0002] Foam plastic has the advantages of light weight, heat insulation, sound insulation, cushioning, and high specific strength. Therefore, it is widely used in the fields of packaging, industry, agriculture, transportation, military industry, aerospace industry and daily necessities. Since the 1990s, the development of foamed plastics in China has been very rapid. The main varieties are polyurethane (PU) soft and rigid foamed plastics, polystyrene (PS) and polyolefin foamed materials. However, PU will produce harmful isocyanate residues during the foaming process and cannot be recycled; while the waste of foamed PS products does not rot and is difficult to recycle, causing "whit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/12B32B27/18B32B27/32B32B15/085C08L23/14C08L23/12C08J9/12B29C47/92B29C47/06B60R13/02B29C48/07B29C48/92
CPCB29C48/397B29C48/07B29C48/0021
Inventor 徐晓冰
Owner 徐晓冰
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