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Flame-retardant irradiation cross-linked polyethylene foam material and preparation method thereof

A technology of cross-linked polyethylene and foaming materials, which is applied in the field of foamed polyethylene products, can solve the problems of poor flame retardant effect of flame retardants, complicated process flow, and low high temperature resistance level, and achieve good flame retardant effect and high production efficiency. Simple process and high thermal stability

Inactive Publication Date: 2021-09-17
中广核高新核材科技(苏州)有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the flame retardants currently used are halogen-containing flame retardants, which not only significantly improve the flame retardant effect of polyethylene foam materials, but also cause problems such as the release of poisonous gas when the material is burned, and secondary damage to the human body. Therefore, the use of restricted
In addition, there are many types of flame retardants with different performances. A single flame retardant has a poor flame retardant effect and often cannot meet actual needs. Therefore, research on high-performance compound flame retardant systems has become more and more extensive in recent years. s concern
[0004] The Chinese patent with the publication number CN104592554A discloses a magnesium hydroxide compound flame retardant cross-linked polyethylene foam composite material. However, the plan is not perfect, and there are still two problems: 1. It is necessary to prepare modified nano-magnesium hydroxide in advance, and the process is complicated; 2. No irradiation is used. Cross-linking technology, the overall performance of the prepared flame-retardant cross-linked polyethylene foam is worse than that of radiation cross-linked products, and the high temperature resistance level is lower

Method used

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  • Flame-retardant irradiation cross-linked polyethylene foam material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1~3

[0043] Embodiment 1~3: Preparation of flame-retardant radiation cross-linked polyethylene foam material

[0044] This embodiment provides an antistatic radiation cross-linked polyethylene foam material and a preparation method thereof, comprising the following steps:

[0045] Step 1: Mixing

[0046] According to the formula in Table 1, low-density polyethylene, linear low-density polyethylene, high-density polyethylene, polyolefin elastomer, foaming agent, foaming aid, cross-linking agent and compatibilizer are first mixed in an internal mixer Stir for 1 minute, mix well, then add decabromodiphenylethane, antimony trioxide, magnesium hydroxide and talcum powder, heat and banbury to 120°C.

[0047] Step 2: One-step molding to obtain the master chip

[0048] Put the material mixed in step 1 directly into the main feeding hopper of the single-screw extruder, install a die head that meets the requirements at the end of the extruder, and extrude the master piece.

[0049] Step 3...

Embodiment 1

[0057] The melt flow rate of low-density polyethylene MI=1.5g / 10min, the melt flow rate of linear low-density polyethylene MI=2.5g / 10min, the melt flow rate of high-density polyethylene MI=8.6g / 10min; The foam aid is stearic acid; the crosslinking agent is TAIC; the compatibilizer is ethylene-octene copolymer grafted with maleic anhydride, and the graft ratio is 1.2%.

Embodiment 2

[0059] The melt flow rate of low-density polyethylene MI=2.0g / 10min, the melt flow rate of linear low-density polyethylene MI=3.6 / 10min, the melt flow rate of high-density polyethylene MI=12.4g / 10min; foaming The auxiliary agent is zinc oxide; the crosslinking agent is TAC; the compatibilizer is ethylene-octene copolymer grafted with maleic anhydride, and the grafting rate is 1.2%.

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Abstract

The invention discloses a flame-retardant irradiation cross-linked polyethylene foam material, which comprises the following components: 35-45 parts of low-density polyethylene, 5-15 parts of linear low-density polyethylene, 5-15 parts of high-density polyethylene, 10-15 parts of a polyolefin elastomer, 2-10 parts of a foaming agent, 2-10 parts of a foaming aid, 0.5-5 parts of a cross-linking agent, 5-20 parts of decabromodiphenyl ethane, 1-10 parts of antimony trioxide, 4-8 parts of magnesium hydroxide, 1-10 parts of talcum powder and 1-5 parts of a compatibilizer, wherein under the condition of 190 DEG C*2.16 kg, the melt index of the low-density polyethylene is 1-3 g / 10 min, the melt index of the linear low-density polyethylene is 2-6 g / 10 min, and the melt index of the high-density polyethylene is 7-22 g / 10 min. According to the invention, the flame-retardant irradiation cross-linked polyethylene foam material is simple in preparation process, and the obtained product is good in size stability, cell compactness and uniformity, non-toxic, free of peculiar smell and excellent in flame retardance.

Description

technical field [0001] The invention relates to the technical field of foamed polyethylene products, in particular to a flame-retardant radiation cross-linked polyethylene foam material (IXPE) and a preparation method thereof. Background technique [0002] Polyethylene foam material is a plastic with countless micropores in the whole. Due to the existence of the gas phase, it has the advantages of low density, heat insulation, sound absorption, and shock resistance. It is widely used in automobiles, navigation, construction, heat insulation, and packaging. And civil and other fields, because this kind of material has the characteristics of low cost, good performance, wide application, etc., so the market prospect is good. [0003] Adding flame retardants to polyethylene foam is the most common method to improve its flame retardancy. Most of the flame retardants currently used are halogen-containing flame retardants, which not only significantly improve the flame retardant e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08K5/03C08K3/22C08J9/10C08J3/24C08J3/28
CPCC08J9/103C08J9/0061C08J9/0019C08J9/0066C08J3/24C08J3/28C08J2203/04C08J2323/06C08J2423/08C08J2423/06
Inventor 史丛丛潘洋陆毅峰黄志杰徐红岩
Owner 中广核高新核材科技(苏州)有限公司
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