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Ultra-thin electron radiation crosslinked polyolefin foamed sheet and preparation method thereof

A technology of cross-linked polyolefin and electron radiation, which is applied in the field of ultra-thin electron radiation cross-linked polyolefin foam sheet and its preparation, can solve the problem that it has not yet been sold, the degree of foaming is difficult to control, and the production process cannot be produced. Ultra-thin sheets, etc.

Active Publication Date: 2014-04-09
HUBEI XIANGYUAN NEW MATERIAL TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there is an urgent need in the market for an ultra-thin electronic radiation cross-linked polyolefin foam sheet with a thickness of only 0.1-0.3 mm, but the traditional formula and production process cannot produce this ultra-thin sheet, so there is no such thing as yet. There are sales of this model
The technical difficulty in the development of this type of electron radiation cross-linked polyolefin foam sheet is: since this type of product is a chemical foam, it is difficult to control the degree of foaming during the foaming process. Currently, the thinnest thickness that can be controlled is 0.5mm

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0014] An ultra-thin (0.1-0.3 mm) electron radiation crosslinked polyolefin foam sheet and a preparation method thereof, comprising the following steps:

[0015] Step 1: Preparation of graft base material: Take 5-20KgLLDPE, 2-10Kg EPDM, 30-60KgEVA, 1-2Kg A171, 0.1-0.3KgDCP, 1-2Kg PE wax, 0.3-0.5Kg1010# into the banburying Fully banburying in the machine for 8-10 minutes, the banburying temperature is 70-100°C, in which A171 is added in the last minute, and then discharged into the two-stage mixing and granulating machine for mixing, grafting, and granulation. The working temperature of the cascade mixing and granulating machine is: 135±5℃ in the first zone, 145±5℃ in the second zone, 165±5℃ in the third zone, 175±5℃ in the fourth zone, 185±5℃ in the fifth zone, 170 in the sixth zone ±5°C.

[0016] The second step: Extrusion of the sheet: Take 80-10Kg of graft base material, 2-3Kg of AC foaming agent, 1-2Kg of TMPTMA, 1-2Kg of zinc stearate, and 3-5Kg of talcum powder into the...

Embodiment 1

[0020] Example 1: An ultra-thin (0.1-0.3 mm) electron radiation crosslinked polyolefin foam sheet and its preparation method,

[0021] The preparation method comprises the following steps in turn:

[0022] An ultra-thin (0.1-0.3 mm) electron radiation crosslinked polyolefin foam sheet and a preparation method thereof, comprising the following steps:

[0023] Step 1: Preparation of graft base material: Take 5KgLLDPE, 2Kg EPDM, 30KgEVA, 1Kg A171, 0.1KgDCP, 1Kg PE wax, 0.3Kg1010# into the internal mixer, fully banbury for 8-10 minutes, the banbury temperature 70-100℃, in which A171 is added at the last minute, and then discharged into the two-stage mixing and granulating machine for mixing, grafting, and granulating. The working temperature of the two-stage mixing and granulating machine is: 1 Zone 135±5℃, zone 2 145±5℃, zone 3 165±5℃, zone 4 175±5℃, zone 5 185±5℃, zone 6 170±5℃.

[0024] The second step: Extrusion of the sheet: take 80Kg of graft base material, 2Kg of AC foami...

Embodiment 2

[0044] With embodiment 1, difference is: the first step: get 20KgLLDPE, 10Kg EPDM, 60KgEVA, 2Kg A171, 0.3KgDCP, 2Kg PE wax, 0.5Kg1010#; Second step: get 10Kg graft base material, 3KgAC foaming agent, 2KgTMPTMA, 2Kg zinc stearate, 5Kg talcum powder.

[0045] Main performance data: product thickness, 0.3mm; service temperature -50-150°C; tensile strength ≥ 3Mpa; elongation at break ≥ 350%; compression set ≤ 1%; average cell diameter ≤ 20μm.

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Abstract

The invention relates to an ultra-thin electron radiation crosslinked polyolefin foamed sheet and a preparation method thereof. The preparation method comprises the following steps: step 1: adding LLDPE (Linear Low Density Polyethylene), EPDM (Ethylene-Propylene-Diene Monomer), EVA (Ethylene Vinyl Acetate), A171, DCP (Dibasic Calcium Phosphate), PE (Polyethylene) wax and an antioxidant 1010 to an internal mixer for fully internal mixing for 8-10 minutes at the internal mixing temperature of 70-100 DEG C, and then discharging the mixture into a double-stepped mixing granulator for mixing, grafting and granulation to obtain a grafting base material; step 2: adding the grafting base material, an AC foaming agent, a crosslinking agent, zinc stearate and talcum powder into a high-speed mixer for mixing, and then discharging the mixture into a single screw extruder to be extruded into a sheet; step 3: adding the extruded sheet in the step 2 to an electronic accelerator for radiation crosslinking; step 4: adding the sheet subjected to radiation crosslinking to a foaming furnace for foaming; and step 5: directly adding the formed sheet to a double-roll calender for calendering to obtain the electron radiation crosslinked polyolefin foamed sheet with the thickness of 0.1-0.3mm.

Description

technical field [0001] The invention relates to an ultra-thin electron radiation crosslinked polyolefin foam sheet and a preparation method. Background technique [0002] Electron radiation cross-linked polyolefin foam sheet, that is, IXPE (Irradiation crpsslinked polyethylene foam) foam material, is a polyolefin polymer and various additives blended and extruded, cross-linked by electron accelerator radiation, high temperature foaming Polymer foam material made by technology. The main features of the product are: thin thickness, light weight, smooth and delicate surface, uniform and closed cells, excellent heat and sound insulation performance, light weight, moisture-proof, environmental protection, good physical properties, and easy secondary processing. The main application scope is: a. In the field of packaging, the product of the invention has excellent cushioning performance, shockproof and shatterproof, and is often used for packaging precision instruments and optica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L51/06C08F255/02C08F255/06C08K13/02C08K5/103C08K5/098C08K3/34C08J9/10B29C47/00B29C59/04B29C71/04B29C44/00
Inventor 魏琼段贤安
Owner HUBEI XIANGYUAN NEW MATERIAL TECH INC
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