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A kind of antistatic ultra-thin foam sheet and preparation method thereof

A foam sheet and ultra-thin technology, which is applied in the field of antistatic ultra-thin foam sheet and its preparation, can solve the difficulty of mixing antistatic agent and polyethylene resin, insufficient mechanical strength, uneven mixing, etc. question

Active Publication Date: 2020-10-23
HUBEI XIANGYUAN NEW MATERIAL TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual engineering practice, adding antistatic materials to the polymer raw material formula has a dispersion problem, and its uneven dispersion will cause uneven antistatic performance, especially for direct foaming with a thickness of several hundred microns. For sheets produced in the form of antistatic agents, uneven distribution of antistatic agents will have a serious impact on performance, resulting in product performance that cannot meet the use requirements at all
[0005] The application number of Sekisui Chemical Industry Co., Ltd. is 201610125944.0 patent application, which also discloses the problem of the difficulty in mixing antistatic agents and polyethylene resins. It limits the DSC curves of antistatic agents and polyethylene resins and selects those that meet the requirements. The specific requirements of the DSC curve of the polyethylene resin and antistatic agent are mixed to overcome the problems of uneven mixing, insufficient mechanical strength and the inability to prepare thinner sheets
[0006] However, the mechanical strength of thinner sheets (thickness below 0.15mm) is difficult to meet the requirements. More importantly, the requirements for antistatic agents limit the use of specific types of antistatic agents, which cannot meet the requirements. actual engineering needs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] The antistatic ultra-thin foam sheet prepared in this example has a sheet thickness of 0.24mm, and is directly prepared by foaming process using polyolefin resin and antistatic agent, and its resistance value is uniform and stable at 10 6 In the range of Ω, the crosslinking degree of the foamed sheet is 60%.

[0058] The specific foaming raw materials and the parts by mass of each component are: 100 parts of polyolefin resin, 5 parts of antistatic agent, 20 parts of foaming agent, 0.5 part of lubricant, 0.1 part of antioxidant, 2 parts of nucleating agent Agent, 10 parts of color masterbatch, 0.5 parts of dispersing agent, and its antistatic agent is selected from betaine type.

[0059] Wherein, the polyolefin resin comprises 25 parts of mLLDPE, 50 parts of LDPE, and 35 parts of EVA. The melting index of the mLLDPE is 0.2g / 10min, and its test condition is 190°C / 2.16KG / 10min. The melt index of the LDPE is 10.0g / 10min, and the test condition is 190°C / 2.16KG / 10min. The ...

Embodiment 2

[0071] The antistatic ultra-thin foam sheet prepared in this example has a sheet thickness of less than 0.20mm, and is directly prepared by foaming process using polyolefin resin and antistatic agent, and its resistance value is uniform and stable at 10 9 In the range of Ω, the crosslinking degree of the foamed sheet is 30%.

[0072] The specific foaming raw materials and the parts by mass of each component are: 100 parts of polyolefin resin, 10 parts of antistatic agent, 1 part of foaming agent, 1 part of lubricant, 0.3 part of antioxidant, 1 part of nucleating agent Agent, 2 parts of color masterbatch, 0.1 part of dispersing agent, and its antistatic agent is selected from sulfonic acid type.

[0073] Wherein, the polyolefin resin comprises 10 parts of mLLDPE, 30 parts of LDPE, and 35 parts of EVA. The melting index of the mLLDPE is 15g / 10min, and its test condition is 190°C / 2.16KG / 10min. The melt index of the LDPE is 0.1g / 10min, and the test conditions are: 190°C / 2.16KG / 1...

Embodiment 3

[0085] The antistatic ultra-thin foam sheet prepared in this example has a sheet thickness of less than 0.15mm, and is directly prepared by foaming process using polyolefin resin and antistatic agent, and its resistance value is uniform and stable at 10 8 In the range of Ω, the crosslinking degree of the foamed sheet is 50%.

[0086] The specific foaming raw materials and the mass parts of each component are: 100 parts of polyolefin resin, 6 parts of antistatic agent, 5 parts of foaming agent, 0.6 part of lubricant, 0.15 part of antioxidant, 1.5 parts of nucleating agent Agent, 5 parts of color masterbatch, 0.2 part of dispersing agent, and its antistatic agent is selected from carbon nanotubes and conductive carbon black. Among them, the antistatic agent is acetylene carbon black in the conductive carbon black. The conductive carbon black has been treated with a coupling agent. Carbon nanotubes are also added to the antistatic agent. The amount of carbon nanotubes added is 0....

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Abstract

The invention discloses an antistatic ultrathin foam sheet, and belongs to the field of antistatic foam materials. The thickness of the sheet is less than 0.25 mm, the sheet is directly produced by using polyolefin resin and an antistatic agent through a foaming process, the resistance of the sheet is uniformly stable in the range of 10<6> to 10<9> omega, the cross-linking degree of the foam sheetis 30-60%, raw materials of the foam sheet comprise, by mass, 100 parts of the polyolefin resin, 5-10 parts of the antistatic agent, 1-20 parts of a foaming agent, 0.5-1 part of a lubricant, 0.1-0.3part of an antioxidant, 1-2 parts of a nucleating agent, 2-10 parts of color master batches and 0.1-0.5 part of a dispersion promoter, and the antistatic agent is selected from betaine type, sulfonicacid type, carbon nanotube and conductive carbon black. The ultrathin antistatic sheet has a uniform antistatic property, the production method is simple, the antistatic agent has many kinds of options, the thickness can be less than 0.15 mm, and the antistatic performance and the thickness are taken into consideration simultaneously.

Description

technical field [0001] The invention belongs to the field of antistatic foaming materials, and more specifically relates to an antistatic ultra-thin foaming sheet and a preparation method thereof. Background technique [0002] As a soft material with smooth surface, closed cells, independent, uniform, infinite length, and non-absorbent, the foam material has good flame retardancy, heat insulation, water release and weather resistance. [0003] As a new type of foam material, ultra-thin anti-static foam material is widely used in the fields of ultra-thin adhesive tape and electronic components. The existing ultra-thin antistatic foaming material is coated with an antistatic agent. Due to the uneven coating thickness of the antistatic agent, the resistance value cannot be guaranteed to be uniform. At the same time, the external coating of the antistatic agent will cause the foaming material to The affinity of the glue is reduced, which makes the glue spreadability of the foam...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L23/08C08K9/04C08K7/24C08K3/08C08J9/10C08J3/28
Inventor 姚守文魏琼
Owner HUBEI XIANGYUAN NEW MATERIAL TECH INC