CN104159742B - 防水传声片材及其生产方法 - Google Patents

防水传声片材及其生产方法 Download PDF

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CN104159742B
CN104159742B CN201380012039.9A CN201380012039A CN104159742B CN 104159742 B CN104159742 B CN 104159742B CN 201380012039 A CN201380012039 A CN 201380012039A CN 104159742 B CN104159742 B CN 104159742B
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transaudient
layer
sheet material
waterproof
coating layer
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CN104159742A (zh
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徐寅踊
李承勋
黄俊植
丁榕湜
金京秀
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Amogreentech Co Ltd
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Abstract

本发明公开了一种防水传声片材及其生产方法的技术，该防水传声片材具有改进的传声效率和进一步改进的防水性。为此，本发明的防水传声片材包括：传声层，该传声层由聚合物材料形成并且形成为具有多个气孔的网；以及涂布层，该涂布层形成在传声层的至少一侧上并且被涂布以堵塞形成于传声层的表面上的气孔。

Description

防水传声片材及其生产方法
技术领域
本发明涉及一种防水传声片材及其生产方法。更具体地，本发明涉及一种具有高传声效率和优异的防水性的防水传声片材，及其生产方法。本申请要求于2012年12月11日提交的韩国专利申请10-2012-0143371号的权益，和于2013年12月11日提交的韩国专利申请10-2013-0154023号的权益，它们通过全文引用而以此被并入本申请中。
背景技术
最近，已经越来越多地使用移动电子设备，诸如便携式终端、数码相机和笔记本电脑。由于这样的移动电子设备是在携带的同时进行使用的，因此需要具有防水特性。然而，这样的移动电子设备被配置成音孔形成在待设置有扬声器或麦克风的部分中，并且水或灰尘会通过音孔渗透进入移动电子设备。
因此，在音孔中设置防水传声片材，用于传声但阻断水或灰尘。生产这样的防水传声片材必须考虑到防水特性和传声效率。
与此相关，韩国专利申请公开10-2010-0041839号(2010年4月22日)公开了由多孔的聚四氟乙烯膜制成的防水传声片材。然而，这种传统的防水传声片材的问题在于：由于它仅由多孔的聚四氟乙烯膜构成，随着片材使用时间的增加，多孔聚四氟乙烯膜的微孔通过外部施加的冲击力或声压而被扩大，从而使其防水性能变差。
发明内容
技术问题
因此设计了本发明以解决上述问题，并且本发明旨于提供一种防水性能改进的无孔的防水传声片材及其生产方法。
另外，本发明旨于容易调整防水传声片材的厚度。具体地，本发明旨于通过简单地使传声层变薄来使防水传声片材的传声性能最大化。
技术方案
为了实现上述目的，本发明的一个方面提供了一种防水传声片材，该防水传声片材包括：传声层，所述传声层由聚合物材料制成并且形成为具有多个孔的网的形状；以及，涂布层，所述涂布层形成在所述传声层的至少一侧上以阻塞存在于所述传声层的表面上的孔。
在这里，传声层可以是通过对聚合物材料进行电纺丝而形成的。
另外，聚合物材料可包括聚偏二氟乙烯(PVDF)。
另外，涂布层可以是使用选自凹版涂布法、浸渍法和喷涂法中的任一种而形成在传声层的至少一侧上，以便阻塞存在于传声层的表面上的孔。
另外，涂布层可包括：第一涂布层，该第一涂布层形成在传声层的一侧上以阻塞存在于传声层的一侧的表面上的孔；以及，第二涂布层，该第二涂布层形成在传声层的另一侧上以阻塞存在于传声层的另一侧的表面上的孔。
另外，传声层和涂布层在125psi下的总透气性可小于0.1cfm。
本发明的另一个方面提供了一种生产防水传声片材的方法，该方法包括以下步骤：对聚合物材料进行电纺丝以形成具有多个孔的网状的传声层；以及，使涂布层形成在传声层的至少一侧上以阻塞存在于传声层的表面上的孔。
在这里，在形成涂布层的步骤中，可使用选自凹版涂布法、浸渍法和喷涂法中的任一种来使涂布层形成在传声层的至少一侧上，以便阻塞存在于传声层的表面上的孔。
另外，聚合物材料可包括聚偏二氟乙烯(PVDF)。
有益效果
根据本发明的防水传声片材具有改进的防水性能。
另外，因为防水传声片材是通过电纺丝形成的，因此能够容易地对它的总厚度进行调整。具体地，通过使传声层变薄能够改进防水传声片材的传声性能。而且，因为能够容易地调整防水传声片材的厚度，所以能够容易地调整防水传声片材的透气性，从而实现优异的声特性。
附图说明
图1是示出根据本发明的实施方式的防水传声片材的结构的截面图。
图2是解释生产根据本发明的实施方式的防水传声片材的方法的流程图。
图3是解释在生产根据本发明的实施方式的防水传声片材的方法中的凹版涂布法的示意图。
图4是解释在生产根据本发明的实施方式的防水传声片材的方法中的浸渍法的示意图。
图5是示出设置有根据本发明的实施方式的防水传声片材的电子设备的示意图。
具体实施方式
在下文中，参照附图对本发明的优选实施方式进行详细描述。在这里，当确定相关领域的详细描述会掩盖本发明的主旨时，其描述将被省略。提供本发明的实施方式以向本领域技术人员更清楚地解释本发明。因此，为了更清楚地解释本发明，可能扩大附图中元件的形状、尺寸等。
在下文中，将详细描述根据本发明的实施方式的防水传声片材。
图1是示出根据本发明的实施方式的防水传声片材的结构的截面图。
参照图1，根据本发明的实施方式的防水传声片材100包括传声层10、第一涂布层20以及第二涂布层30。
传声层10由聚合物材料制成，并且形成为具有多个孔的网的形状。在此情况下，形成传声层10的聚合物材料包括聚偏二氟乙烯(PVDF)。
而且，聚合物材料可包括：聚酰胺；聚酰亚胺；聚酰胺酰亚胺；聚(间亚苯基异酞酰胺)；聚砜；聚醚酮；聚醚酰亚胺；芳族聚酯，诸如聚对苯二甲酸乙二醇酯、聚对苯二甲酸丙二醇酯和聚萘二甲酸乙二醇酯；聚四氟乙烯；聚磷腈，诸如聚二苯氧基磷腈和聚(双(2-(2-甲氧基乙氧基)磷腈))；聚氨酯及其共聚物；乙酸纤维素；乙酸丁酸纤维素；以及乙酸丙酸纤维素。另外，聚合物材料也可包括：聚偏氟乙烯(polyvinylidenefluoride，PVDF)、聚(偏氟乙烯-共-六氟丙烯)、全氟聚合物、聚氯乙烯或聚偏氯乙烯及其共聚物、包括聚乙二醇二烷基醚和聚乙二醇二烷基酯的聚乙二醇衍生物、聚(氧化亚甲基-低聚-氧化亚乙基)、包括聚环氧乙烷和聚环氧丙烷的聚氧化物、聚乙酸乙烯酯、聚(乙烯基吡咯烷酮-乙酸乙烯酯)、聚苯乙烯和聚苯乙烯-丙烯腈共聚物、聚丙烯腈(polyacrylontrile)、聚丙烯腈-甲基丙烯酸甲酯共聚物、聚甲基丙烯酸甲酯、聚甲基丙烯酸甲酯共聚物，以及它们的混合物。
可通过对聚合物材料进行电纺丝而形成传声层10。同样地，由于传声层10是通过电纺丝形成的，因此易于对它的厚度进行调整。具体地，因为传声层10的厚度通过电纺丝工艺而易于被降低，所以防水传声片材100的总传声性能变得优异。也就是说，因为声音是通过孔进行传递的，所以多孔的防水传声片材对其厚度的程度相对有些敏感。相比之下，无孔的防水传声片材100只有当使它变薄时才能有效地将声振动从其一侧传递至另一侧。
另外，与包括多孔的传声片材相比，无孔的防水传声片材100因它包括无孔类型的传声层10而能够展示出高防水性能。
第一涂布层20形成在传声层10的一侧上。另外，第一涂布层20被配置为阻塞存在于传声层10的表面上的孔。此第一涂布层20可通过凹版涂布而形成在传声层10的表面上。
第二涂布层30形成在传声层10的另一侧上。此第二涂布层30可由与第一涂布层20相同的聚合物材料制成，所不同的是：第二涂布层30相对于传声层10的位置与第一涂布层20不同。因此，由第一涂布层20的详细描述取代第二涂布层30的详细描述。
根据本发明的实施方式的防水传声片材100被配置为第一涂布层20和第二涂布层30形成在传声层10的两侧上，但也可以根据其设备的种类而被配置为涂布层仅形成在传声层10的一侧上。在此情况下，可形成在125psi下具有0.1cfm透气性的防水传声片材100，该防水传声片材100包括第一涂布层20、传声层10和第二涂布层30。
该防水传声片材100是无孔的防水传声片材，且被配置为空气不得从其一侧传递到另一侧。
在下文中，将详细描述生产根据本发明的实施方式的防水传声片材的方法。
图2是解释生产根据本发明的实施方式的防水传声片材的方法的流程图。图3是解释在生产根据本发明的实施方式的防水传声片材的方法中的凹版涂布法的示意图。图4是解释生产根据本发明的实施方式的防水传声片材的方法中的浸渍法的示意图。
参照图2，在生产根据本发明的实施方式的防水传声片材的方法中，首先，制备包括聚合物材料的纺丝溶液(S10)。在此情况下，聚合物材料可包括聚偏二氟乙烯(PVDF)。
随后，通过电纺丝涂覆在步骤S10中制备的纺丝溶液，以形成网状的传声层(S20)。
之后，对在步骤S20中形成的传声层的表面进行凹版涂布，以在传声层的至少一侧上形成涂布层(S30)。在此情况下，涂布层被配置为阻塞存在于传声层的表面上的孔。参照图3详细解释凹版涂布法，首先，使传声层10在第一辊(R1)和第二辊(R2)之间穿过。在此情况下，第一辊(R1)部分地浸没在涂布液(P)中，并且第一辊(R1)在其表面上设置有多个凹槽(RG)。通过第一辊(R1)的旋转使涂布液(P)渗透到凹槽(RG)中，并且通过在第一辊(R1)与第二辊(R2)接触部分处的热和压力使传声层10的表面涂布有涂布液(P)。
同时，参照图4，可使用浸渍法代替凹版涂布法来进行步骤S30。也就是说，使卷绕在供应辊1上的传声层穿过涂布液(P)，经干燥机2进行干燥并且随后经挤压辊3进行挤压，以形成用于阻塞存在于传声层的表面上的孔的涂布层。
而且，也可以使用喷涂法代替凹版涂布法来进行步骤S30。也就是说，通过喷嘴将涂布液(P)涂覆到传声层的表面上，以形成用于阻塞存在于传声层的表面上的孔的涂布层。
在步骤S30之后，还可以对无孔的防水传声片材进行疏油处理。
图5是示出设置有根据本发明的实施方式的防水传声片材的电子设备的示意图。
参照图5，示出了电子设备(即，移动终端)的壳体(C)的内部。在移动终端的壳体(C)中，将根据本发明的实施方式的防水传声片材100a或100b施加到音孔(即，麦克风孔或扬声器孔)上。在这种情况下，用于支撑形状的支撑框架100a'可形成在防水传声片材100a的周边。在图5中，壳体(C)中的实线指示在移动终端中形成的电路、壳体等。
虽然为了说明目的而公开了本发明的优选实施方式，但是本领域技术人员应理解在没有脱离所附权利要求书所公开的本发明的范围和精神的情况下，各种修改、增加和替换都是可能的。

Claims (9)

1.一种防水传声片材，包括：
传声层，所述传声层由聚合物材料制成并且形成为具有多个孔的网的形状；以及
涂布层，所述涂布层形成在所述传声层的至少一侧上以阻塞存在于所述传声层的表面上的孔，
其中，所述传声层是通过对所述聚合物材料进行电纺丝而形成的。
2.根据权利要求1所述的防水传声片材，其中，所述聚合物材料包含聚偏二氟乙烯。
3.根据权利要求1所述的防水传声片材，其中，所述涂布层是使用选自凹版涂布法、浸渍法和喷涂法中的任一种而形成在所述传声层的至少一侧上的，以便阻塞存在于所述传声层的表面上的孔。
4.根据权利要求1所述的防水传声片材，其中，所述涂布层包括：
第一涂布层，所述第一涂布层形成在所述传声层的一侧上以阻塞存在于所述传声层的一侧的表面上的孔；以及
第二涂布层，所述第二涂布层形成在所述传声层的另一侧上以阻塞存在于所述传声层的另一侧的表面上的孔。
5.根据权利要求1所述的防水传声片材，其中，所述传声层和所述涂布层在125psi下的总透气性小于0.1cfm。
6.一种生产防水传声片材的方法，包括以下步骤：
对聚合物材料进行电纺丝以形成具有多个孔的网状的传声层；以及
在所述传声层的至少一侧上形成涂布层以阻塞存在于所述传声层的表面上的孔。
7.根据权利要求6所述的方法，其中，在形成所述涂布层的步骤中，使用选自凹版涂布法、浸渍法和喷涂法中的任一种来使所述涂布层形成在所述传声层的至少一侧上，以便阻塞存在于所述传声层的表面上的孔。
8.根据权利要求6所述的方法，其中，所述聚合物材料包含聚偏二氟乙烯。
9.一种电子设备，包括根据权利要求1至5中任一项所述的防水传声片材，所述防水传声片材附接到所述电子设备的音孔上。
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