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Preparation method of high performance expanded polyethylene product

A foamed polyethylene, high-performance technology, applied in the field of the preparation of foamed polyethylene products, can solve the problems of poor collision resistance, intolerant of vacuum and high temperature, unable to meet the protection requirements of high-end electrical appliances and precision instruments, etc. The effect of scratch resistance and puncture resistance, excellent heat and low temperature resistance, good market development potential

Active Publication Date: 2012-07-11
XIAMEN SANDEXIN SCI&TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the density and surface hardness of EPE materials widely used in the market are relatively low. The density can only reach 20-30g / m3, and the hardness can only reach 30-40 Shore hardness. Poor collision performance, unable to meet the protection requirements of high-end electrical appliances and precision instruments
[0004] In addition, the existing blister products are made of ordinary plastic sheets. Due to the high density of the sheet, the surface after molding is hard and has no cushioning performance. After the product is placed, it is easily damaged by impact.
Ordinary EPE, due to its low density and low hardness, cannot be made into a blister product by blistering. After blistering, the product is fragile and easy to recover due to the large difference in shape of the product; generally through the embossing process, only Textures are processed on the surface of the material, and the forming accuracy is low
[0005] In addition, the existing blister trays are made of ordinary plastic sheets, which have not been foamed, have high density, have hard surfaces after molding, and have no cushioning properties.
After the product is placed in the tray, it is vulnerable to impact and damage
Ordinary EPE, due to its low density, low hardness, resistance to vacuum and high temperature, cannot be formed through the blister process, so it is generally flat, and a few of them are processed by embossing on the surface of the material, and the forming accuracy is low.

Method used

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  • Preparation method of high performance expanded polyethylene product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1) 40kgLDPE, 10kgLLDPE, 0.01kgDCP and 0.3kg talc powder are sucked into the hopper of the extruder through a vacuum feeder, and then fall into the barrel of the extruder, and then enter the homogenization section after being transported and melted.

[0037] 2) Add 100ml of butane and 24g of glyceryl monostearate (melted) before the homogenization section with a high-pressure metering pump, and the various materials are fully contacted and mixed in the homogenization section, so that the additives and butane are evenly dispersed in the melt.

[0038] 3) Extrude through the filter, foam, cool, shape, flatten, pull, and roll to obtain the product.

[0039] 4) Density measurement: cut the foamed polyethylene sheet, measure its length (l), width (w), height (h), and then measure its weight (m), then the density ρ=m / (l*w*h)

[0040] Surface hardness measurement: measured by Shore hardness tester.

[0041] The experimental results are shown in the table.

[0042] Table 1

...

Embodiment 2

[0045] As described in Example 1, step 1) is changed to: 45kgLDPE, 5kgLLDPE, 0.01kgDCP and 0.5kg talcum powder are sucked into the hopper of the extruder through a vacuum feeder to make it fall into the barrel of the extruder. The melt enters the homogenization section. The experimental results are shown in Table 2:

[0046] Table 2

[0047] Density (g / m 3 )

Embodiment 3

[0049] As described in Example 1, step 1) is changed to: 30kgLDPE, 20kgLLDPE, 0.015kgDCP and 0.6kg light calcium carbonate are sucked into the hopper of the extruder through a vacuum feeder to make it fall into the barrel of the extruder. Conveying and melting into the homogenization section. The experimental results are shown in Table 3:

[0050] table 3

[0051] Density (g / m 3 )

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Abstract

The invention relates to a preparation method of a high performance expanded polyethylene product. The material of the invention comprises the following component in parts by weight: 50 parts of LDPE (low-density polyethylene) and LLDPE (linear low-density polyethylene), 0.01-1 parts of peroxide, 0.3-2 parts of talcum powder and / or calcium carbonate, 0.02-0.06 parts of antishrinking agent and 0.1-0.4 parts of foaming agent. In the invention, butane is used as the foaming agent, and the LDPE and the LLDPE are used as resin raw materials. The expanded polyethylene prepared by the preparation method of the invention has the advantages of high density and high surface hardness, the density of the expanded polyethylene is 60-400g / m<3> and the surface hardness is 40-70 degrees. The high performance expanded polyethylene product has good anti-scraping performance and puncture resistance as well as good rebound resilience and anti-quake effect. The high performance expanded polyethylene product meets the requirements of high performance of current packaging materials and fully protecting the substances being packaged. In addition, the high performance expanded polyethylene product has theadvantage of long sustainable using time as a panel and good market potential.

Description

technical field [0001] The invention relates to a material and a manufacturing method thereof, in particular to a manufacturing method of a high-performance foamed polyethylene product. Background technique [0002] With the rapid development of my country's national economic construction, a large number of high-sensitivity and high-precision electronic equipment, optical instruments, instrumentation appliances and other equipment require high-quality packaging with good protection performance. At the same time, protective materials with excellent heat insulation, heat preservation, cushioning and buoyancy properties are also very much needed in the fields of railway, navigation, aviation packaging and transportation that are matched with the transportation of the above products. The research on expanded polyethylene (EPE) that has arisen in my country in recent years is just the beginning of solving this problem, and has achieved results so far. EPE is a light-weight prote...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08K13/02C08K5/14C08K3/34C08K3/26C08K5/103C08J9/14B29C69/00B29B7/00
Inventor 吴雪和宋刚刘达
Owner XIAMEN SANDEXIN SCI&TECH CO LTD
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