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Anti-static irradiation crosslinked polyethylene foam material and preparation method thereof

A technology of cross-linked polyethylene and foamed materials, applied in the field of foamed polyethylene products, can solve the problems of complicated preparation process of foamed sheets, and achieve the effects of reducing loss, excellent mechanical properties and saving processing costs

Pending Publication Date: 2021-10-22
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

However, the preparation process of the foamed sheet of this scheme is also relatively complicated. It is necessary to obtain a variety of masterbatches through mixing and granulation, and then mix and extrude the masterbatch and resin substrate to obtain a foamed substrate. The foam base sheet is irradiated and cross-linked, heated and foamed to obtain a foamed sheet

Method used

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  • Anti-static irradiation crosslinked polyethylene foam material and preparation method thereof

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Comparison scheme
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Embodiment 1~3

[0040] Embodiment 1~3: Preparation of antistatic radiation cross-linked polyethylene foam material

[0041] This embodiment provides an antistatic radiation cross-linked polyethylene foam material and a preparation method thereof, comprising the following steps:

[0042] Step 1: Mixing

[0043] According to the formula in Table 1, first stir low-density polyethylene, olefin block copolymer, foaming agent, foaming aid, crosslinking agent, polyethylene wax and antioxidant in an internal mixer for 1 minute, and mix well , and then add conductive carbon black and fillers, heat and banbury to 120°C.

[0044] Step 2: One-step molding to obtain the master chip

[0045] Put the materials mixed in step 1 directly into the main feeding hopper of the single-screw extruder. There is a feeding section in the middle section of the single-screw extruder. A die head that meets the requirements is installed at the end of the extruder to extrude the mother sheet.

[0046] Step 3: Irradiatio...

Embodiment 1

[0053] In embodiment 1: the melting index MI=1.5g / 10min of low-density polyethylene; Foaming auxiliary agent is zinc oxide; The particle diameter of conductive carbon black is 15-25nm, pH=6-7.5; Antioxidant is main antioxidant Oxygen 1076 + auxiliary antioxidant DSTP; cross-linking agent is a mixture of TAIC and TAC.

Embodiment 2

[0054] In embodiment 2: the melting index MI=2g / 10min of low-density polyethylene; Foaming aid is zinc oxide and stearic acid mixture, and mass ratio is 1:5; The particle diameter of conductive carbon black is 15-25nm, pH =6-7.5; antioxidant main antioxidant 1076 + auxiliary antioxidant DSTP; cross-linking agent is a mixture of TAIC and TMPTMA.

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Abstract

The invention discloses an anti-static irradiation crosslinked polyethylene foam material. The foam material comprises, by weight, 25-35 parts of low-density polyethylene, 10-15 parts of an olefin block copolymer, 5-8 parts of a foaming agent, 5-8 parts of a foaming aid, 1-5 parts of a cross-linking agent, 0.5-3 parts of a sensitizing aid, 2-5 parts of polyethylene wax, 3-10 parts of conductive carbon black, 0.1-0.5 part of an antioxidant and 4-8 parts of a filler, wherein the melt index MI of the low-density polyethylene under the condition of 190 DEG C * 2.16 kg is equal to 1-3 g / 10 min; and the olefin block copolymer is an ethylene-octylene copolymer, the octylene content is 20-30%, and the density is 0.865-0.895 g / cm<3>. The invention also discloses a preparation method of the antistatic irradiation crosslinked polyethylene foam material. According to the anti-static irradiation crosslinked polyethylene foam material, master slices to be cross-linked can be prepared through one-step forming, the technological process is greatly simplified, and the obtained product is stable in conductivity, light in weight, free of toxicity and peculiar smell and excellent in mechanical property.

Description

technical field [0001] The invention relates to the technical field of foamed polyethylene products, in particular to an antistatic radiation cross-linked polyethylene foam material and a preparation method thereof. Background technique [0002] Anti-static foaming materials can be used in the field of consumer electronics, such as mobile phones, computers, mobile phone accessories and other electronic devices, as well as the packaging of various electronic products such as small household appliances and large household appliances, to cushion shock and prevent static electricity. effect. The current anti-static foaming materials have poor overall performance, short anti-static timeliness and low production efficiency. [0003] The anti-static foaming materials currently used in the market mainly include anti-static pearl foam, molded block polyethylene or EVA conductive foaming materials. Among them, anti-static pearl foam is uncrosslinked polyethylene, and its foaming is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L53/00C08K5/098C08K3/26C08K3/34C08K3/04C08K5/3492C08K5/103C08J9/10
CPCC08J9/103C08J9/102C08J9/0023C08J9/0028C08J9/0066C08J9/0095C08J2203/04C08J2323/06C08J2423/06C08J2453/00
Inventor 潘洋史丛丛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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