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Water-blocking foam and its preparation method and application

A technology of water foam and foam, which is applied in the field of foam, can solve problems such as damage, unsatisfactory water resistance and cushioning performance, and failure of mobile phones and other equipment, so as to improve mechanical strength, excellent transparency and dimensional stability, and save energy. the effect of time

Active Publication Date: 2020-07-24
ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the water resistance and cushioning properties of the foam used in the market are not ideal, which may easily lead to malfunction or damage of mobile phones and other equipment.

Method used

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  • Water-blocking foam and its preparation method and application
  • Water-blocking foam and its preparation method and application
  • Water-blocking foam and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] see figure 1 , which is a schematic structural view of the water-blocking foam of the embodiment of the present invention. The water-blocking foam of this embodiment includes a PET layer 1 , a PVDC layer 2 and a foam layer 3 in contact with each other in sequence. The thicknesses of the PET layer 1 , the PVDC layer 2 and the foam layer 3 are 10 μm, 10 μm and 80 μm respectively. The water-blocking foam is 0.1mm thick.

[0061] In this embodiment, the foam layer 3 is prepared by blending polyethylene and additive masterbatch at a mass ratio of 10:1. The auxiliary agent masterbatch is prepared from polyethylene, carbon nanotubes and azodicarbonamide in a mass ratio of 100:1:1. The average molecular weight of described polyethylene is 80000, and density is 0.965g / cm 3 , The melt index is 1.5g / 10min. The carbon nanotubes are single-wall carbon nanotubes (the model is XFQ045, and the manufacturer is Nanjing Xianfeng Nano Material Technology Co., Ltd.).

[0062] The avera...

Embodiment 2

[0074] The water-blocking foam of this embodiment includes a PET layer, a PVDC layer and a foam layer in contact with each other in sequence. The thicknesses of the PET layer, PVDC layer and foam layer are 5 μm, 15 μm and 80 μm respectively. The water-blocking foam is 0.1mm thick.

[0075] In this embodiment, the foam layer is prepared by blending polyethylene and additive masterbatch at a mass ratio of 10:0.8. The auxiliary agent masterbatch is prepared from polyethylene, carbon nanotubes and azodicarbonamide in a mass ratio of 80:1.2:1.2. The average molecular weight of the polyethylene is 100000, and the density is 0.975g / cm 3 , The melt index is 1.2g / 10min. The carbon nanotubes are single-wall carbon nanotubes (the model is XFQ045, and the manufacturer is Nanjing Xianfeng Nano Material Technology Co., Ltd.).

[0076] The average molecular weight of the PET masterbatch of the PET layer is 10000, and the density is 1.25g / cm 3 , The melt index is 13g / 10min.

[0077] The...

Embodiment 3

[0087] The water-blocking foam of this embodiment includes a PET layer, a PVDC layer and a foam layer in contact with each other in sequence. The thicknesses of the PET layer, PVDC layer and foam layer are 15 μm, 5 μm and 80 μm respectively. The water-blocking foam is 0.1mm thick.

[0088] In this embodiment, the foam layer is prepared by blending polyethylene and additive masterbatch at a mass ratio of 10:1.2. The auxiliary agent masterbatch is prepared from polyethylene, carbon nanotubes and azodicarbonamide in a mass ratio of 120:0.8:0.8. The average molecular weight of described polyethylene is 200000, and density is 1.0g / cm 3 , Melt index is 1g / 10min. The carbon nanotubes are single-walled carbon nanotubes.

[0089] The average molecular weight of the PET masterbatch of the PET layer is 20000, and the density is 1.32g / cm 3 , The melt index is 10g / 10min.

[0090] The PVDC masterbatch of the PVDC layer has an average molecular weight of 70,000 and a density of 0.78g / c...

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Abstract

The invention relates to the technical field of foam, in particular to water blocking foam, and a preparation method and application thereof. The water blocking foam comprises a PET layer, a PVDC layer and a foam layer. The water blocking foam compounds the PET layer, the PVDC layer and the foam layer, thereby having a high barrier property, and further having excellent water resistance and bufferperformance, the moisture permeability can be smaller than 0.5g / (m<2>.24h), and a three-dimensional network structure of the foam layer and uniform and dense foam holes can effectively protect electronic equipment and prolong the service life.

Description

technical field [0001] The invention relates to the technical field of foam, in particular to a water-blocking foam and its preparation method and application. Background technique [0002] With the development of society, mobile electronic devices such as mobile phones and tablet computers have become commonly used communication devices, especially mobile phones have become an indispensable and practical tool in life. [0003] At present, OLED technology has been widely used in mobile phone display, and its penetration in mobile phones shows a trend of increasing year by year. Since the development trend of mobile phones is thinning, in order to meet the needs of the public, OLED mobile phone screens are also becoming thinner and thinner. However, the thin and light OLED mobile phone screen has risks such as being easily broken. Therefore, during the design process, foam is often pasted on the back of the OLED screen to protect the screen. At the same time, with the rapi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/36B32B27/30B32B27/32B32B27/08B32B33/00C09J7/29B29C69/00B29C41/32B29C55/12B29C71/04
CPCB29C41/32B29C55/12B29C69/00B29C71/04B32B5/18B32B27/08B32B27/304B32B27/32B32B27/36B32B33/00B32B2266/025B32B2307/306B32B2307/412B32B2307/7244B32B2307/7246B32B2307/7265B32B2307/734C09J2301/122C09J2301/162C09J2301/302
Inventor 李长顺
Owner ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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