WO2021092712A1 - 一种电磁屏蔽复合导电薄膜及其制备方法 - Google Patents

一种电磁屏蔽复合导电薄膜及其制备方法 Download PDF

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WO2021092712A1
WO2021092712A1 PCT/CN2019/116955 CN2019116955W WO2021092712A1 WO 2021092712 A1 WO2021092712 A1 WO 2021092712A1 CN 2019116955 W CN2019116955 W CN 2019116955W WO 2021092712 A1 WO2021092712 A1 WO 2021092712A1
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electromagnetic shielding
composite conductive
conductive film
shielding composite
stainless steel
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PCT/CN2019/116955
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English (en)
French (fr)
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陈红辉
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常德鑫睿新材料有限公司
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Priority to PCT/CN2019/116955 priority Critical patent/WO2021092712A1/zh
Publication of WO2021092712A1 publication Critical patent/WO2021092712A1/zh

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
    • C08K13/04—Ingredients characterised by their shape and organic or inorganic ingredients
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C08K7/04—Fibres or whiskers inorganic
    • C08K7/06—Elements
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
    • C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08L27/06—Homopolymers or copolymers of vinyl chloride

Definitions

  • the invention relates to the technical field of electromagnetic shielding, in particular to an electromagnetic shielding composite conductive film and a preparation method thereof.
  • Electromagnetic shielding is the main technology to suppress electromagnetic interference.
  • the competition in the shielding material market is becoming increasingly fierce.
  • shielding composite materials have received increasing attention from researchers.
  • Many countries have invested a lot of manpower and material resources to conduct in-depth research on electromagnetic shielding materials.
  • the technical problem to be solved by the present invention is to provide an electromagnetic shielding composite conductive film, which has better shielding effectiveness at low frequencies and expands the application range of electromagnetic shielding materials.
  • An electromagnetic shielding composite conductive film using polyvinyl chloride resin and stainless steel fiber as raw materials, and the weight percentage of each component is as follows:
  • Coupling agent 5-10% Coupling agent 5-10%.
  • the thickness of the electromagnetic shielding composite conductive film is 20-50 ⁇ m.
  • the aspect ratio of the stainless steel fiber is 60-100:1.
  • the coupling agent is a silane coupling agent.
  • the invention also provides a preparation method of the electromagnetic shielding composite conductive film.
  • a preparation method of electromagnetic shielding composite conductive film includes the following steps:
  • Step S1 Disperse the stainless steel fiber in a solvent with ultrasonic for 60-120 minutes;
  • Step S2 the dispersed stainless steel fiber is fully mixed with the melted polyvinyl chloride resin
  • Step S3 ultrasonic vibration for 60-120min, and then vacuumize under the condition of 10 -2 -10 -3 Pa;
  • Step S4 curing at 80-110°C for 24-48h.
  • the electromagnetic shielding composite conductive film of the present invention uses polyvinyl chloride resin as a base material, filled with a certain amount of stainless steel fibers to form a conductive grid, has good shielding effectiveness, and has good damping and flame retardant properties. For electromagnetic waves in the frequency range of 1-100MHz, its shielding effectiveness reaches 50dB, which expands the application range of electromagnetic shielding materials.
  • An electromagnetic shielding composite conductive film including the following components in weight percentage:
  • the aspect ratio of the stainless steel fiber is 60:1; the thickness of the electromagnetic shielding composite conductive film is 30 ⁇ m; and the coupling agent is a silane coupling agent.
  • Step S1 Disperse the stainless steel fiber in a solvent with ultrasonic for 60-120 minutes;
  • Step S2 the dispersed stainless steel fiber is fully mixed with the melted polyvinyl chloride resin
  • Step S3 ultrasonic vibration for 60-120min, and then vacuumize under the condition of 10 -2 -10 -3 Pa;
  • Step S4 curing at 80-110°C for 24-48h.
  • the electromagnetic shielding composite conductive film prepared in this embodiment has a shielding performance of 50 dB for electromagnetic waves in the frequency range of 1-100 MHz.
  • An electromagnetic shielding composite conductive film including the following components in weight percentage:
  • the aspect ratio of the stainless steel fiber is 100:1; the thickness of the electromagnetic shielding composite conductive film is 50 ⁇ m; and the coupling agent is a silane coupling agent.
  • Step S1 Disperse the stainless steel fiber in a solvent with ultrasonic for 60-120 minutes;
  • Step S2 the dispersed stainless steel fiber is fully mixed with the melted polyvinyl chloride resin
  • Step S3 ultrasonic vibration for 60-120min, and then vacuumize under the condition of 10 -2 -10 -3 Pa;
  • Step S4 curing at 80-110°C for 24-48h.
  • the electromagnetic shielding composite conductive film prepared in this embodiment has a shielding performance of 45 dB for electromagnetic waves in the frequency range of 1-100 MHz.
  • An electromagnetic shielding composite conductive film including the following components in weight percentage:
  • the aspect ratio of the stainless steel fiber is 80:1; the thickness of the electromagnetic shielding composite conductive film is 20 ⁇ m.
  • Step S1 Disperse the stainless steel fiber in a solvent with ultrasonic for 60-120 minutes;
  • Step S2 the dispersed stainless steel fiber is fully mixed with the melted polyvinyl chloride resin
  • Step S3 ultrasonic vibration for 60-120min, and then vacuumize under the condition of 10 -2 -10 -3 Pa;
  • Step S4 curing at 80-110°C for 24-48h.
  • the electromagnetic shielding composite conductive film prepared in this embodiment has a shielding performance of 40 dB against electromagnetic waves in the frequency range of 1-100 MHz.
  • the electromagnetic shielding composite conductive film of the present invention uses polyvinyl chloride resin as a base material, filled with a certain amount of stainless steel fibers to form a conductive grid, has good shielding effectiveness, and has good damping and flame retardant properties. For electromagnetic waves in the frequency range of 1-100MHz, its shielding effectiveness reaches 50dB, which expands the application range of electromagnetic shielding materials.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

一种电磁屏蔽复合导电薄膜，以聚氯乙烯树脂、不锈钢纤维为原料，各成分重量百分比如下：聚氯乙烯树脂50-60％；不锈钢纤维35-45％；偶联剂5-10％。提供的电磁屏蔽复合导电膜，其在低频时具有较好的屏蔽效能，扩展了电磁屏蔽材料的应用范围。还提供一种电磁屏蔽复合导电膜的制备方法。

Description

一种电磁屏蔽复合导电薄膜及其制备方法 技术领域
本发明涉及电磁屏蔽技术领域，特别涉及一种电磁屏蔽复合导电薄膜及其制备方法。
背景技术
电磁屏蔽是抑制电磁干扰的主要技术，屏蔽材料市场竞争日趋激烈，屏蔽复合材料作为一种新型屏蔽材料，日益收到研究者们的高度重视。各国均投入了大量的人力和物力对电磁屏蔽材料进行深入研究。
目前的复合材料大多侧重于高频段电磁波的屏蔽，虽然获得了较好的屏蔽效果，但应用在低频时，屏蔽效果较差，不能达到环境要求的屏蔽效能。
鉴于此，有必要提供一种低频电磁屏蔽材料解决上述技术问题。
发明内容
本发明要解决的技术问题是提供一种电磁屏蔽复合导电薄膜，其在低频时具有较好的屏蔽效能，扩展了电磁屏蔽材料的应用范围。
为了解决上述问题，本发明的技术方案如下：
一种电磁屏蔽复合导电薄膜，以聚氯乙烯树脂、不锈钢纤维为原料，各成分重量百分比如下：
聚氯乙烯树脂 50-60％；
不锈钢纤维 35-45％；
偶联剂 5-10％。
进一步地，所述电磁屏蔽复合导电薄膜的厚度为20-50μm。
进一步地，所述不锈钢纤维的长径比是60-100:1。
进一步地，所述偶联剂为硅烷偶联剂。
本发明还提供一种电磁屏蔽复合导电薄膜的制备方法。
一种电磁屏蔽复合导电薄膜的制备方法，包括如下步骤：
步骤S1，将不锈钢纤维在溶剂中用超声波分散60-120min；
步骤S2，分散后的不锈钢纤维与熔融后的聚氯乙烯树脂充分混合；
步骤S3，超声波震荡60-120min，然后在真空度为10 -2-10 -3Pa条件下抽真空；
步骤S4，在80-110℃条件下固化24-48h。
本发明提供的电磁屏蔽复合导电薄膜及其制备方法，有益效果在于：
本发明的电磁屏蔽复合导电薄膜，以聚氯乙烯树脂为基材，在其中填充一定量的不锈钢纤维，形成导电网格，具有良好的屏蔽效能，并具有良好的阻尼和阻燃性能。对于1-100MHz频率范围内的电磁波，其屏蔽效能达50dB，扩展了电磁屏蔽材料的应用范围。
具体实施方式
为了使本技术领域的人员更好地理解本发明实施例中的技术方案，并使本发明的上述目的、特征和优点能够更加明显易懂，下面结合附图对本发明的具体实施方式作进一步的说明。
在此需要说明的是，对于这些实施方式的说明用于帮助理解本发明，但并不构成对本发明的限定。此外，下面所描述的本发明各个实施方式中所涉及的技术特征只要彼此之间未构成冲突就可以相互结合。
实施例1
一种电磁屏蔽复合导电薄膜，包括按重量百分比计的如下成分：
聚氯乙烯树脂 50％；
不锈钢纤维 45％；
偶联剂 5％。
本实施例中，不锈钢纤维的长径比是60:1；电磁屏蔽复合导电薄膜的厚度为30μm；偶联剂为硅烷偶联剂。
本实施例的电磁屏蔽复合导电薄膜的制备方法，包括如下步骤：
步骤S1，将不锈钢纤维在溶剂中用超声波分散60-120min；
步骤S2，分散后的不锈钢纤维与熔融后的聚氯乙烯树脂充分混合；
步骤S3，超声波震荡60-120min，然后在真空度为10 -2-10 -3Pa条件下抽真空；
步骤S4，在80-110℃条件下固化24-48h。
本实施例制备得到的电磁屏蔽复合导电薄膜，对于1-100MHz频率范围内的电磁波，其屏蔽性能为50dB。
实施例2
一种电磁屏蔽复合导电薄膜，包括按重量百分比计的如下成分：
聚氯乙烯树脂 60％；
不锈钢纤维 35％；
偶联剂 5％。
本实施例中，不锈钢纤维的长径比是100:1；电磁屏蔽复合导电薄膜的厚度为50μm；偶联剂为硅烷偶联剂。
本实施例的电磁屏蔽复合导电薄膜的制备方法，包括如下步骤：
步骤S1，将不锈钢纤维在溶剂中用超声波分散60-120min；
步骤S2，分散后的不锈钢纤维与熔融后的聚氯乙烯树脂充分混合；
步骤S3，超声波震荡60-120min，然后在真空度为10 -2-10 -3Pa条件下抽真空；
步骤S4，在80-110℃条件下固化24-48h。
本实施例制备得到的电磁屏蔽复合导电薄膜，对于1-100MHz频率范围内的电磁波，其屏蔽性能为45dB。
实施例3
一种电磁屏蔽复合导电薄膜，包括按重量百分比计的如下成分：
聚氯乙烯树脂 55％；
不锈钢纤维 35％；
偶联剂 10％。
本实施例中，不锈钢纤维的长径比是80:1；电磁屏蔽复合导电薄膜的厚度为20μm。
本实施例的电磁屏蔽复合导电薄膜的制备方法，包括如下步骤：
步骤S1，将不锈钢纤维在溶剂中用超声波分散60-120min；
步骤S2，分散后的不锈钢纤维与熔融后的聚氯乙烯树脂充分混合；
步骤S3，超声波震荡60-120min，然后在真空度为10 -2-10 -3Pa条件下抽真空；
步骤S4，在80-110℃条件下固化24-48h。
本实施例制备得到的电磁屏蔽复合导电薄膜，对于1-100MHz频率范围内的电磁波其屏蔽性能为40dB。
本发明的电磁屏蔽复合导电薄膜，以聚氯乙烯树脂为基材，在其中填充一定量的不锈钢纤维，形成导电网格，具有良好的屏蔽效能，并具有良好的阻尼和阻燃性能。对于1-100MHz频率范围内的电磁波，其屏蔽效能达50dB，扩展了电磁屏蔽材料的应用范围。
本说明书中的各个实施例均采用递进的方式描述，各个实施例之间相同相似的部分互相参见即可，每个实施例重点说明的都是与其它实施例的不同之处。
以上结合附图对本发明的实施方式作出详细说明，但本发明不局限于所描述的实施方式。对本领域的技术人员而言，在不脱离本发明的原理和精神的情况下对这些实施例进行的多种变化、修改、替换和变型均仍落入在本发明的保护范围之内。

Claims (5)

  1. 一种电磁屏蔽复合导电薄膜，其特征在于，以聚氯乙烯树脂、不锈钢纤维为原料，各成分重量百分比如下：
    聚氯乙烯树脂50-60％；
    不锈钢纤维35-45％；
    偶联剂5-10％。
  2. 根据权利要求1所述的电磁屏蔽复合导电薄膜，其特征在于，所述电磁屏蔽复合导电薄膜的厚度为20-50μm。
  3. 根据权利要求1所述的电磁屏蔽复合导电薄膜，其特征在于，所述不锈钢纤维的长径比是60-100:1。
  4. 根据权利要求1所述的电磁屏蔽复合导电薄膜，其特征在于，所述偶联剂为硅烷偶联剂。
  5. 一种如权利要求1所述的电磁屏蔽复合导电薄膜的制备方法，其特征在于，包括如下步骤：
    步骤S1，将不锈钢纤维在溶剂中用超声波分散60-120min；
    步骤S2，分散后的不锈钢纤维与熔融后的聚氯乙烯树脂充分混合；
    步骤S3，超声波震荡60-120min，然后在真空度为10 -2-10 -3Pa条件下抽真空；
    步骤S4，在80-110℃条件下固化24-48h。
PCT/CN2019/116955 2019-11-11 2019-11-11 一种电磁屏蔽复合导电薄膜及其制备方法 WO2021092712A1 (zh)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6142568A (ja) * 1984-08-03 1986-03-01 Fujikura Ltd 電磁波遮蔽用樹脂混和物
JPS6377971A (ja) * 1986-09-22 1988-04-08 Idemitsu Petrochem Co Ltd ステンレス繊維含有熱可塑性樹脂組成物
CN102093651A (zh) * 2010-12-27 2011-06-15 康泰塑胶科技集团有限公司 阻燃电磁屏蔽聚氯乙烯材料及其生产方法和电工套管
CN103467952A (zh) * 2012-06-06 2013-12-25 合肥杰事杰新材料股份有限公司 一种连续长导电纤维填充电磁屏蔽复合材料及其制备方法
CN106496918A (zh) * 2016-11-10 2017-03-15 过冬 一种复合型导电塑料的制备方法
CN109370205A (zh) * 2018-10-15 2019-02-22 中广核高新核材科技（苏州）有限公司 含不锈钢纤维的电磁屏蔽复合材料

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6142568A (ja) * 1984-08-03 1986-03-01 Fujikura Ltd 電磁波遮蔽用樹脂混和物
JPS6377971A (ja) * 1986-09-22 1988-04-08 Idemitsu Petrochem Co Ltd ステンレス繊維含有熱可塑性樹脂組成物
CN102093651A (zh) * 2010-12-27 2011-06-15 康泰塑胶科技集团有限公司 阻燃电磁屏蔽聚氯乙烯材料及其生产方法和电工套管
CN103467952A (zh) * 2012-06-06 2013-12-25 合肥杰事杰新材料股份有限公司 一种连续长导电纤维填充电磁屏蔽复合材料及其制备方法
CN106496918A (zh) * 2016-11-10 2017-03-15 过冬 一种复合型导电塑料的制备方法
CN109370205A (zh) * 2018-10-15 2019-02-22 中广核高新核材科技（苏州）有限公司 含不锈钢纤维的电磁屏蔽复合材料

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