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Heat-insulated degradable polypropylene foaming material and production method thereof

A foaming material, polypropylene technology, applied in the field of polymer composite materials, can solve the problems of narrow extrusion foaming processing window, difficulty in extrusion foaming, poor expandability of polypropylene, etc., and achieve easy recycling and easy plasticity Deformable, readily biodegradable effects

Active Publication Date: 2013-10-23
顾建生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with polystyrene and polyethylene materials, extrusion foaming of polypropylene is very difficult. The main reason is that polypropylene has poor expandability, and the processing window for extrusion foaming is very narrow. The suitable foaming temperature range is only The temperature is 4°C, which has high requirements on the performance of the foaming system, processing equipment and molding process

Method used

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  • Heat-insulated degradable polypropylene foaming material and production method thereof
  • Heat-insulated degradable polypropylene foaming material and production method thereof
  • Heat-insulated degradable polypropylene foaming material and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] 1) Proportion the components and mass:

[0077] Long-chain branched polypropylene resin: 60 parts;

[0078] High crystalline homopolypropylene: 30 parts;

[0079] Chitosan nucleating agent: 1 part;

[0080] 1076 antioxidant: 0.5 parts;

[0081] Colorant: 1 part;

[0082] MB50-002 slip agent: 1 part;

[0083] Citric acid chemical foaming agent: 0.5 part;

[0084] The components according to the mass ratio are uniformly dry mixed by a high-speed mixer;

[0085] 2) First-stage twin-screw extrusion: set the screw speed of the first-stage twin-screw extruder to 120r / min, the melt pressure to 17MPa, and the melt temperature to 185°C;

[0086] The first-stage twin-screw extruder includes three heating sections: feeding, melting and homogenizing. Among them, the heating temperature of the feeding section is set at 175°C, and the mixture formed after dry mixing is directly fed into the hopper, and the solid mixture is pushed into this section by the twin-screw for heating...

Embodiment 5

[0091] 1) Proportion the components and mass:

[0092] Long-chain branched polypropylene resin: 65 parts;

[0093] High crystalline homopolypropylene: 20 parts;

[0094] Linear low density polyethylene: 5 parts;

[0095] Talc nucleating agent: 2 parts;

[0096] 1076 antioxidant: 0.5 parts;

[0097] Colorant: 1 part;

[0098] MB50-002 slip agent: 1 part;

[0099] Citric acid chemical foaming agent: 0.5 parts;

[0100] The components according to the mass ratio are uniformly dry mixed by a high-speed mixer;

[0101] 2) First-stage twin-screw extrusion: set the screw speed of the first-stage twin-screw extruder to 20r / min, the melt pressure to 17MPa, and the melt temperature to 185°C;

[0102] The first-stage twin-screw extruder includes three heating sections: feeding, melting and homogenizing. Among them, the heating temperature of the feeding section is set at 175°C, and the mixture formed after dry mixing is directly fed into the hopper, and the solid mixture is pushe...

Embodiment 9

[0107] 1) Proportion the components and mass:

[0108] Long-chain branched polypropylene resin: 70 parts;

[0109] High crystalline homopolypropylene: 10 parts;

[0110] Ethylene-vinyl alcohol copolymer resin: 10 parts;

[0111] Calcium carbonate nucleating agent: 3 parts;

[0112] 1010 Antioxidant: 0.5 parts;

[0113] Colorant: 1 part;

[0114] EDS slip agent: 1 part;

[0115] Azodicarbonamide chemical blowing agent: 0.5 part;

[0116] The components according to the mass ratio are uniformly dry mixed by a high-speed mixer;

[0117] 2) The first-stage twin-screw extrusion: set the screw speed of the first-stage twin-screw extruder to 20r / min, the melt pressure to 16MPa, and the melt temperature to 185°C;

[0118] The first-stage twin-screw extruder includes three heating sections: feeding, melting and homogenizing. Among them, the heating temperature of the feeding section is set at 170°C, and the mixture formed after dry mixing is directly fed into the hopper, and th...

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Abstract

The invention provides a heat-insulated degradable polypropylene foaming material and a production method thereof. The heat-insulated degradable polypropylene foaming material comprises the following components in parts by weight: 60-85 parts of long-chain branched polypropylene resin, 0.1-30 parts of high-crystallization polypropylene resin, 0.1-10 parts of polyethylene resin, 0.1-5 parts of nucleating agent, 0.1-5 parts of antioxidant, 0-5 parts of coloring agent, 1-3 parts of slipping agent and 0.1-5 parts of chemical foaming agent, wherein according to the ISO 16790-2005 regulation, the long-chain branched polypropylene resin has melt strength of 30Pa.s-40Pa.s, a melting temperature of 160 EG C-240 DEG C, a branch chain carbon atom number of 20-30 and a molecular weight multi-dispersion index of 5.0-7.0, and is continuously produced by a two-order serial-connection extruder. During the preparation process, the physical foaming agent is added, wherein the physical foaming agent is one or more of carbon dioxide with a supercritical fluid form, nitrogen gas, helium gas, argon gas, hydrogen gas, pentane and butane; and the filling amount of the physical foaming agent is 1-10 parts.

Description

technical field [0001] The invention relates to a functional composite material, in particular to a heat-insulating degradable polypropylene foam material and a production method thereof, belonging to the field of polymer composite materials. Background technique [0002] Foam materials have the advantages of low density, heat insulation and low price, and are widely used in product packaging, industrial manufacturing, transportation, military aerospace and other fields, including polyurethane soft and rigid foam, polystyrene foam and Three types of polyolefin foam plastics. However, due to the existence of isocyanate residues harmful to the human body in the polyurethane foaming process, and the product is not easy to recycle; the chlorofluorocarbon compound or butane used in the polystyrene foaming process pollutes the environment, and the product is difficult to degrade and easily causes "white" Pollution; Cross-linked polyethylene foam has low rigidity and limited appli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08L23/06C08L23/08B29C47/92B29C48/92
CPCB29C48/385B29C48/0017B29C48/92B29C2948/92704B29C2948/92895
Inventor 顾建生
Owner 顾建生
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