WO2016188107A1 - 电子产品用屏蔽保护膜 - Google Patents

电子产品用屏蔽保护膜 Download PDF

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WO2016188107A1
WO2016188107A1 PCT/CN2015/099354 CN2015099354W WO2016188107A1 WO 2016188107 A1 WO2016188107 A1 WO 2016188107A1 CN 2015099354 W CN2015099354 W CN 2015099354W WO 2016188107 A1 WO2016188107 A1 WO 2016188107A1
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layer
parts
absorbing
adhesive layer
wave
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PCT/CN2015/099354
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English (en)
French (fr)
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金闯
梁豪
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苏州斯迪克新材料科技股份有限公司
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/082—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising vinyl resins; comprising acrylic resins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/06—Unsaturated polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/212—Electromagnetic interference shielding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2571/00—Protective equipment
    • 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
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives

Definitions

  • the invention belongs to the technical field of electronic materials, and in particular relates to a shielding protective film for electronic products.
  • a sheet or a net of metal which is widely used as a shielding material is heavy, and there is a problem in that it requires labor and time to be disposed in a casing of the apparatus.
  • the metal sheet or the web tends to have a large anisotropy in electromagnetic wave absorbing ability, that is, the electromagnetic wave absorbing ability tends to decrease remarkably when the incident angle of the electromagnetic wave is increased.
  • the electromagnetic waves emitted by electronic products will cause electromagnetic interference to other electronic devices around them, making them work abnormally; it will also cause harm to human health.
  • miniaturization and high integration are the mainstream trends in the development of electronic products, and the internal space of these products is relatively small.
  • the patch type absorbing material has a thin thickness and is convenient to use, and has a good effect on reducing electromagnetic radiation and preventing electromagnetic interference, and is suitable for application in an electronic product. Therefore, designing and developing a patch type electromagnetic wave absorbing material which is thin in thickness, light in weight, and suitable for use in a narrow space has become a direction of efforts of those skilled in the art.
  • the invention provides a shielding protective film for an electronic product.
  • the shielding protective film for the electronic product improves the utilization ratio of the reflected electromagnetic field of the metal layer, significantly improves the absorbing property of the protective tape, and avoids excessive concentration of heat, which is beneficial to heat. Diffusion also avoids the film upturn due to temperature rise, which improves the stability of product performance.
  • the technical solution adopted by the present invention is: a shielding protective film for electronic products, a metal layer, an absorbing layer, and a release material layer; a first adhesive layer disposed between the PET insulating layer and the metal layer, and a second adhesive layer disposed between the metal layer and the absorbing layer, the suction a third adhesive layer, a polypropylene film layer and a fourth adhesive layer are disposed between the wave layer and the release material layer; the surface of the fourth adhesive layer contacting the release material layer has a plurality of bumps;
  • the absorbing layer consists of components:
  • the absorbing powder consists of the following components:
  • the thickness of the first adhesive layer is smaller than the thickness of the second adhesive layer, and the thickness of the second adhesive layer is smaller than that of the third adhesive layer.
  • the thickness ratio of the PET insulating layer to the polypropylene film layer is 10:4-6.
  • the barium ferrite powder, the nickel oxynitride, the nanographite powder and the cobalt chloride in the absorbing powder are mixed in a ratio of 10:2:1:1 by weight.
  • the present invention has the following advantages over the prior art:
  • the composite film with the function of shielding electromagnetic field, the absorbing layer adopts composite absorbing powder carbonyl iron powder, nickel oxynitride, nano graphite powder, cobalt chloride and butyl acrylate 20-35 parts, acrylic acid 10 ⁇ 20 parts, 20-35 parts of isooctyl acrylate, 10-30 of methyl methacrylate, 1-3 of vinyl acetate, 0.1-1 part of 2-hydroxyethyl methacrylate synergistically, with strong electromagnetic wave absorption characteristics
  • the attenuation rate of electromagnetic waves at 2 to 10 GHz is 87%, and further 0.5 to 2 parts of sodium polyacrylate and 0.4 to 1 part of methyl ethyl ketone peroxide are beneficial to the adhesion of the polymer and the uniform dispersion of the mixed powder in the polymer.
  • the formulation is further formulated with an unsaturated polyester, sodium dodecylbenzenesulfonate to improve the thermal conductivity of the entire absorbing layer, and is advantageous for spreading the heat generated by the electromagnetic wave. Improved performance stability and product life.
  • the shielding protective film for electronic products of the invention improves the utilization ratio of the reflected electromagnetic field of the metal layer, and the setting of the metal layer can form multiple absorptions, which significantly improves the absorbing property of the film; secondly, the absorbing layer and the release layer thereof
  • a third adhesive layer, a polypropylene film layer and a fourth adhesive layer are sequentially disposed between the material layers, thereby greatly improving the voltage breakdown resistance and the strength of the absorption film; again, the fourth
  • the surface of the adhesive layer in contact with the release material layer has a plurality of bumps, which facilitates the discharge of gas during the bonding, thereby avoiding the generation of bubbles.
  • FIG. 1 is a schematic view showing the structure of a shielding protective film for an electronic product according to the present invention.
  • Embodiments 1 to 4 a shielding protective film for an electronic product, comprising a metal layer 2, an absorbing layer 3, and a release material layer 4; a first adhesive layer 5 is disposed between the PET insulating layer 1 and the metal layer 2, A second adhesive layer 6 is disposed between the metal layer 2 and the absorbing layer 3; a third adhesive layer 7 and a polypropylene film layer 5 are sequentially disposed between the absorbing layer 3 and the release material layer 4. And a fourth adhesive layer 8; the surface of the fourth adhesive layer 8 in contact with the release material layer 4 has a plurality of bumps 1.
  • composition and content of the absorbing layer 3 are shown in Table 1:
  • the absorbing powder consists of the content components shown in Table 2:
  • Example 1 Example 2 Example 3
  • Example 4 Barium ferrite powder 100 copies 100 copies 100 copies 100 copies 100 copies 100 copies Nickel oxide 20 copies 22 copies 20 copies 25 copies
  • Nano graphite powder 10 copies 8 servings 10 copies 9 copies
  • the thickness of the first adhesive layer 5 is smaller than the thickness of the second adhesive layer 6, and the thickness of the second adhesive layer 7 is smaller than that of the third adhesive layer 7.
  • the thickness ratio of the PET insulating layer 1 to the polypropylene film layer 10 is 10:4 to 6.
  • the above unsaturated polyester is synthesized from maleic anhydride, phthalic anhydride and propylene glycol.
  • the thickness ratio of the PET insulating layer 1 to the polypropylene film layer 5 is 10:6; the average height of the bump 1 is 8 ⁇ m.
  • the PET insulating layer 1 has a thickness of 6 ⁇ m; the thickness ratio of the PET insulating layer 1 to the polypropylene film layer 5 is 10:5.
  • the preparation process of the absorbing layer 3 of the above embodiment comprises the following steps:
  • the first step 100 parts of barium ferrite powder, 18-25 parts of nickel oxynitride, 8-12 parts of nano graphite powder, 8-12 parts of cobalt chloride, 60-70 parts of unsaturated polyester, dodecane 40-50 parts of sodium benzenesulfonate is uniformly mixed, and stirred at 84-86 ° C to form a mixed powder;
  • the second step 25 to 35 parts of butyl acrylate, 12 to 15 parts of acrylic acid, 20 to 35 parts of isooctyl acrylate, 10 to 30 methyl methacrylate, 1 to 3 of vinyl acetate, and 2-hydroxy methacrylate 0.1 to 1 part of ethyl ester, 0.5 to 2 parts of sodium polyacrylate, 2 to 3 parts of polyacrylate emulsion are mixed with the mixed powder of the first step, and dispersed by a high-speed stirrer for 1 to 2 hours, thereby uniformly mixing to form a mixture;
  • the third step heating the mixture of the second step to 80-85 ° C in the reaction kettle, and then adding 0.4 to 1 part of methyl ethyl ketone peroxide in the heat preservation process to obtain an absorbing mixture. 4 to 10 hours;
  • the fourth step applying the absorbing mixture obtained in the third step to the substrate;
  • Step 5 Baking the absorbing mixture in the fourth step to form an absorbing layer.
  • the above shielding film for electronic products it is advantageous for the adhesion of the polymer, and the dispersion powder is uniformly dispersed in the polymer, thereby ensuring the reliability of the electromagnetic performance; secondly, the formulation is further compounded with the unsaturated poly
  • the ester, sodium dodecylbenzene sulfonate improves the thermal conductivity of the entire absorbing layer, facilitates the diffusion of heat generated by electromagnetic waves, and improves performance stability and product life.

Abstract

一种电子产品用屏蔽保护膜，包括PET绝缘层（1）、金属层（2）、吸波层（3）和离型材料层（4）；PET绝缘层（1）与金属层（2）之间设置有第一胶粘层（5），所述金属层（2）与吸波层（3）之间设置有第二胶粘层（6），所述吸波层（3）由以下组分组成：吸波粉体100份、丙烯酸丁酯25～35份、丙烯酸12～15份、丙烯酸异辛酯20～35份、甲基丙烯酸甲酯10～30份、醋酸乙烯1～3份、甲基丙烯酸-2-羟乙酯0.1～1份、聚丙烯酸钠0.5～2份、过氧化甲乙酮0.4～1份，吸波粉体由以下组分组成：钡铁氧体粉100份、三氧化二镍18～25份、纳米石墨粉8～12份、氯化钴8～12份、不饱和聚酯60～70份，十二烷基苯磺酸钠40～50份，这种屏蔽保护膜显著提高了保护胶带的吸波性能，且避免了热量的过于集中，有利于热量扩散。

Description

电子产品用屏蔽保护膜 技术领域
本发明属于电子材料技术领域，尤其涉及一种电子产品用屏蔽保护膜。
背景技术
目前，作为屏蔽材料而广泛使用的金属的片或网较重，有配置在设备的壳体内需要花费劳力和时间的问题。而且，金属的片或网存在电磁波吸收能力具有大的各向异性的倾向，即当电磁波的入射角增大时电磁波吸收能力显著下降的倾向。电子产品释放出的电磁波，会给周围的其它电子设备带来电磁干扰，使其工作异常；同时也会对人体健康造成危害。目前来说，微型化、高度集成化是电子产品发展的主流趋势，这些产品的内部空间相对狭小。吸波材料中，贴片型吸波材料厚度薄，使用方便，对于降低电磁辐射、防止电磁干扰有很好的效果，比较适合应用在电子产品中。因此，设计开发厚度薄、质量轻、适用于狭小空间的贴片型电磁波吸收材料，成为本领域技术人员努力的方向。
发明内容
本发明提供一种电子产品用屏蔽保护膜，此电子产品用屏蔽保护膜提高了金属层反射电磁场的利用率，显著提高了保护胶带的吸波性能，且避免了热量的过于集中，有利于热量扩散，也避免由于温升导致膜上翘，提高了产品性能的稳定性。
为达到上述目的，本发明采用的技术方案是：一种电子产品用屏蔽保护膜， 包括金属层、吸波层和离型材料层；PET绝缘层与金属层之间设置有第一胶粘层，所述金属层与吸波层之间设置有第二胶粘层，所述吸波层与离型材料层之间依次设置有第三胶粘层、聚丙烯薄膜层和第四胶粘层；所述第四胶粘层与离型材料层接触的表面具有若干个凸点；
所述吸波层由组分组成：
Figure PCTCN2015099354-appb-000001
所述吸波粉体由以下组分组成：
Figure PCTCN2015099354-appb-000002
上述技术方案中进一步改进的技术方案如下：
1、上述方案中，所述第一胶粘层的厚度小于第二胶粘层的厚度，所述第二胶粘层的厚度小于第三胶粘层。
2、上述方案中，所述PET绝缘层与聚丙烯薄膜层的厚度比为10：4～6。
3、上述方案中，所述吸波粉体中钡铁氧体粉、三氧化二镍、纳米石墨粉和氯化钴按照10：2：1：1重量份比例混合。
由于上述技术方案运用，本发明与现有技术相比具有下列优点：
1、本发明具有屏蔽电磁场功能的复合贴膜，其吸波层采用复合吸波粉体羰基铁粉、三氧化二镍、纳米石墨粉、氯化钴与丙烯酸丁酯20～35份、丙烯酸10～20份、丙烯酸异辛酯20～35份、甲基丙烯酸甲酯10～30、醋酸乙烯1～3、甲基丙烯酸-2-羟乙酯0.1～1份协同作用，具有较强的电磁波吸收特性，在2～10GHz电磁波的衰减率达到87％，进一步添加聚丙烯酸钠0.5～2份、过氧化甲乙酮0.4～1份，既有利于聚合物胶粘，也使得混合粉体在聚合物中分散均匀，从而保证了电磁性能的可靠性；其次，配方中进一步配以不饱和聚酯、十二烷基苯磺酸钠提高了整个吸波层的导热性能，有利于将电磁波产生的热量扩撒，改善了性能的稳定性和产品使用寿命。
2、本发明电子产品用屏蔽保护膜，其提高了金属层反射电磁场的利用率，金属层的设置可以形成多次吸收，显著提高了贴膜的吸波性能；其次，其吸波层与离型材料层之间依次设置有第三胶粘层、聚丙烯薄膜层和第四胶粘层，大幅度提高了其耐电压击穿的效果，也提高了吸波膜的强度；再次，其第四胶粘层与离型材料层接触的表面具有若干个凸点，有利于贴合时气体的排出，从而避免了气泡的产生。
附图说明
附图1为本发明电子产品用屏蔽保护膜结构示意图。
以上附图中：1、凸点；2、金属层；3、吸波层；4、离型材料层；5、聚丙烯薄膜层；6、第二胶粘层；7、第三胶粘层；8、第四胶粘层。
具体实施方式
下面结合附图及实施例对本发明作进一步描述：
实施例1～4：一种电子产品用屏蔽保护膜，包括金属层2、吸波层3和离型材料层4；PET绝缘层1与金属层2之间设置有第一胶粘层5，所述金属层2与吸波层3之间设置有第二胶粘层6；所述吸波层3与离型材料层4之间依次设置有第三胶粘层7、聚丙烯薄膜层5和第四胶粘层8；所述第四胶粘层8与离型材料层4接触的表面具有若干个凸点1。
所述吸波层3的组分和含量如表1所示：
表1
Figure PCTCN2015099354-appb-000003
Figure PCTCN2015099354-appb-000004
所述吸波粉体的由表2所示的含量组分组成：
表2
  实施例1 实施例2 实施例3 实施例4
钡铁氧体粉 100份 100份 100份 100份
三氧化二镍 20份 22份 20份 25份
纳米石墨粉 10份 8份 10份 9份
氯化钴 10份 12份 10份 12份
不饱和聚酯 60份 68份 65份 62份
十二烷基苯磺酸钠 40份 50份 48份 42份
上述第一胶粘层5的厚度小于第二胶粘层6的厚度，所述第二胶粘层7的厚度小于第三胶粘层7。
上述PET绝缘层1与聚丙烯薄膜层10的厚度比为10：4～6。
上述不饱和聚酯由顺丁烯二酸酐、邻苯二甲酸酐及丙二醇合成而成。
实施例1～4在2～18GHz频段的最大反射系数和有效带宽如表3所示：
表3
Figure PCTCN2015099354-appb-000005
上述PET绝缘层1与聚丙烯薄膜层5的厚度比为10：6；上述凸点1的平均高度为8微米。
上述PET绝缘层1厚度为6微米；所述PET绝缘层1与聚丙烯薄膜层5的厚度比为10：5。
上述实施例吸波层3的制备工艺，包括以下步骤：
第一步：将钡铁氧体粉100份、三氧化二镍18～25份、纳米石墨粉8～12份、氯化钴8～12份、不饱和聚酯60～70份、十二烷基苯磺酸钠40～50份混合均匀，并在84～86℃条件搅拌形成混合粉体；
第二步：将丙烯酸丁酯25～35份、丙烯酸12～15份、丙烯酸异辛酯20～35份、甲基丙烯酸甲酯10～30、醋酸乙烯1～3、甲基丙烯酸-2-羟乙酯0.1～1份、聚丙烯酸钠0.5～2份、聚丙烯酸酯乳液2～3份与第一步的混合粉体混合，并经高速搅拌器分散1～2小时，从而混合均匀形成混合物；
第三步：在反应釜中将第二步的混合物加热至80～85℃后保温，在保温过程中分1～3次加入过氧化甲乙酮0.4～1份获得吸波混合液，所述保温时间为4～10小时；
第四步：将第三步获得的吸波混合液涂布于基板上；
第五步：对第四步中的吸波混合液进行烘烤形成吸波层。
采用上述电子产品用屏蔽保护膜时，，既有利于聚合物胶粘，也使得混合粉体在聚合物中分散均匀，从而保证了电磁性能的可靠性；其次，配方中进一步配以不饱和聚酯、十二烷基苯磺酸钠提高了整个吸波层的导热性能，有利于将电磁波产生的热量扩撒，改善了性能的稳定性和产品使用寿命。
上述实施例只为说明本发明的技术构思及特点，其目的在于让熟悉此项技术的人士能够了解本发明的内容并据以实施，并不能以此限制本发明的保护范围。凡根据本发明精神实质所作的等效变化或修饰，都应涵盖在本发明的保护范围之内。

Claims (4)

  1. 一种电子产品用屏蔽保护膜，其特征在于：包括金属层(2)、吸波层(3)和离型材料层(4)；PET绝缘层(1)与金属层(2)之间设置有第一胶粘层(5)，所述金属层(2)与吸波层(3)之间设置有第二胶粘层(6)，所述吸波层(3)与离型材料层(4)之间依次设置有第三胶粘层(7)、聚丙烯薄膜层(5)和第四胶粘层(8)；
    所述吸波层(3)由以下组分组成：
    Figure PCTCN2015099354-appb-100001
    所述吸波粉体由以下组分组成：
    Figure PCTCN2015099354-appb-100002
    Figure PCTCN2015099354-appb-100003
  2. 根据权利要求1所述的电子产品用屏蔽保护膜，其特征在于：所述吸波粉体中钡铁氧体粉、三氧化二镍、纳米石墨粉和氯化钴按照10：2：1：1重量份比例混合。
  3. 根据权利要求1所述的电子产品用屏蔽保护膜，其特征在于：所述第一胶粘层(5)的厚度小于第二胶粘层(6)的厚度，所述第二胶粘层(7)的厚度小于第三胶粘层(7)。
  4. 根据权利要求1所述的电子产品用屏蔽保护膜，其特征在于：所述PET绝缘层(1)与聚丙烯薄膜层(5)的厚度比为10：4～6。
PCT/CN2015/099354 2015-05-26 2015-12-29 电子产品用屏蔽保护膜 WO2016188107A1 (zh)

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