HDPE (high-density polyethylene)/LDPE (low-density polyethylene) blended foam material and preparation method thereof

A foaming material and blending technology, which is applied in the field of foaming materials and their molding, can solve the problems of non-uniform properties of foaming materials and uneven mixing of materials, and achieve uniform cells, good compatibility and uniform material properties Effect

Active Publication Date: 2013-05-22
如东文园投资开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: in the prior art, when the HDPE / LDPE blended foam material is produced by adopting the method of firstly kneading in the mill and then extruding by the extruder, the material is mixed unevenly, which leads to the final The performance of the foam material is not uniform,

Method used

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  • HDPE (high-density polyethylene)/LDPE (low-density polyethylene) blended foam material and preparation method thereof
  • HDPE (high-density polyethylene)/LDPE (low-density polyethylene) blended foam material and preparation method thereof
  • HDPE (high-density polyethylene)/LDPE (low-density polyethylene) blended foam material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] The foaming formula is: 10 parts of HDPE, 90 parts of LDPE, 0.5 parts of dicumyl peroxide (DCP), 3 parts of Ac foaming agent, 1.3 parts of zinc oxide, 0.5 parts of stearic acid, and 0.1 part of antioxidant 1010 , 3 parts of inorganic filler calcium carbonate.

[0060] Process:

[0061] (1) Mix HDPE and LDPE on a high-speed mixer according to the ratio, and then extrude the mixture through a twin-screw extruder to granulate. The temperature settings of each zone of the twin-screw extruder are shown in Table 3. ℃ drying for 8 hours to obtain a dry base material;

[0062] (2) Plasticize the dried blend in an open mill with a roll temperature of 143°C, gradually add other additives, and finally add foaming agent, and make triangular bags 5 times until the blend is evenly mixed , remove the sheet and flatten it while it is hot;

[0063] (3) Preform the tablet in a mold frame at 150°C with a pressure of 5 MPa for 10 minutes, and foam the prepared sample sheet on a flat vul...

Embodiment 2

[0068] The foaming formula is: 25 parts of HDPE, 75 parts of LDPE, 0.5 parts of benzoyl peroxide (BPO), 5 parts of Ac foaming agent, 1.5 parts of zinc oxide, 0.5 parts of stearic acid, 0.1 parts of antioxidant 1010 parts, 6 parts of inorganic filler mica powder.

[0069] Process:

[0070] (1) Mix HDPE and LDPE on a high-speed mixer according to the ratio, and then extrude the mixture through a twin-screw extruder to granulate. The temperature settings of each zone of the twin-screw extruder are shown in Table 3. ℃ drying for 8 hours to obtain a dry base material;

[0071] (2) Plasticize the dried blend in an open mill with a roll temperature of 144°C, gradually add other additives, and finally add foaming agent, and make triangular bags 6 times until the blend is evenly mixed , remove the sheet and flatten it while it is hot;

[0072] (3) Preform the sheet in a mold frame at 150°C with a pressure of 5 MPa for 10 minutes, and foam the prepared sample sheet on a flat vulcaniz...

Embodiment 3

[0077] The foaming formula is: 50 parts of HDPE, 50 parts of LDPE, 0.5 parts of dicumyl peroxide (DCP), 7 parts of Ac foaming agent, 1.7 parts of zinc oxide, 0.5 parts of stearic acid, and 1010 antioxidants 0.1 part, 9 parts of inorganic filler calcium carbonate.

[0078] Process:

[0079] (1) Mix HDPE and LDPE on a high-speed mixer according to the ratio, and then extrude the mixture through a twin-screw extruder to granulate. The temperature settings of each zone of the twin-screw extruder are shown in Table 3. ℃ drying for 8 hours to obtain a dry base material;

[0080] (2) Plasticize the dried blend in an open mill with a roll temperature of 145°C, gradually add other additives, and finally add foaming agent, and make triangular bags 7 times until the blend is evenly mixed , remove the sheet and flatten it while it is hot;

[0081] (3) Preform the sheet in a mold frame at 150°C with a pressure of 5 MPa for 10 minutes, place the prepared sample sheet in an electric heati...

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Abstract

The invention relates to a foam material and a forming method thereof, and particularly relates to an HDPE (high-density polyethylene) / LDPE (low-density polyethylene) blended material and a foamed forming method thereof. The blended material comprises the following raw materials in parts by weight: 100 parts of HDPE and LDPE (the weight ratio of HDPE to LDPE is 10:90-90:10), 0.5 part of a crosslinking agent, 3-10 parts of an Ac foaming agent, 1-2 parts of zinc oxides, 0.5 part of a stearic acid, 0.1 part of an antioxidant, and 3-15 parts of an inorganic filler; and the forming method comprises the following main steps: firstly, carrying out blending, extruding pelletizing on HDPE and LDPE in proportion; drying the obtained object; carrying out plastification on the dried object in an open mill, and in the process of plastification, gradually adding other additives until a blending material is uniformly mixed; taking down a material sheet, carrying out hot-pressing on the material sheet, and carrying out pre-preforming operation on the material sheet; and finally, placing the material sheet in a die to carry out foamed forming.

Description

technical field [0001] The invention relates to a foaming material and a molding method thereof, in particular to a high-density polyethylene (HDPE) / low-density polyethylene (LDPE) blend material and a foaming molding method thereof. Background technique [0002] Polyethylene (PE) is a polymer formed by the polymerization of ethylene. The product has been developed for about 60 years. At present, the global polyethylene production ranks first among the five general-purpose resins. PE has also been widely used in various industrial fields. Applications. [0003] Polyethylene can be divided into high-density polyethylene (HDPE) and low-density polyethylene (LDPE). In terms of mechanical properties, due to the few and short branches on the HDPE main chain and high crystallinity, its tensile strength, hardness Both are superior to LDPE, and the impact strength is lower than that of LDPE. LDPE has good low temperature resistance. In terms of chemical properties, HDPE has bette...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08J9/10C08K13/02C08K3/22C08K5/09B29C44/00B29B7/00
Inventor 廖华勇周玲玲陶国良
Owner 如东文园投资开发有限公司
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