CN110696444A - 一种绝缘导热布 - Google Patents
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Abstract
本发明公开了一种绝缘导热布，所述绝缘导热布包括：绝缘保护层、中间热扩散层和表面热传导层；所述绝缘保护层由柔性树脂组成，所述中间热扩散层由碳纤维织物构成，所述表面热传导层由导热树脂构成，所述中间热扩散层嵌入在表面热传导层内。通过上述方式，本发明兼具以碳纤维织物为主干的高强度和快速热扩散能的同时，还具有优秀的绝缘性能，可以防止使用中产生漏电。
Description
技术领域
本发明涉及碳纤维技术领域，特别是涉及一种绝缘导热布。
背景技术
导热布可以将热源发出的热量迅速引导出来，一方面可以防止热量积聚在热源位置产生火灾，另一方面可以实现均匀加热的目的，因此在电子产品生产加工业和电热毯、按摩装置等生活用品上取得广泛应用，目前常用的纤维布主要有两种，一种是以铝箔为导热面的铝基导热布，但是铝箔本身太薄，折弯时容易受到损伤，影响导热效果而且容易导电，另一种是以碳纤维为基材的碳纤维布，所述碳纤维编织成布后本身也具有良好的导热性能，但是也具有较好的导电性能，因此这两种导热布应用在一些特殊环境中容易引起漏电等问题。
发明内容
本发明主要解决的技术问题是提供一种导热绝缘布，能够实现快速热扩散的同时防止漏电。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种绝缘导热布，所述绝缘导热布包括：绝缘保护层、中间热扩散层和表面热传导层；所述绝缘保护层由柔性树脂组成，所述中间热扩散层由碳纤维织物构成，所述表面热传导层由导热树脂构成，所述中间热扩散层嵌入在表面热传导层内。
在本发明一个较佳实施例中，所述碳纤维织物为大孔碳纤维增强布。
在本发明一个较佳实施例中，所述的大孔碳纤维增强布中间的织孔直径为0.2~0.6mm。
在本发明一个较佳实施例中，所述绝缘保护层为硅橡胶保护层。
在本发明一个较佳实施例中，所述绝缘保护层的厚度为0.5~1.5mm。
在本发明一个较佳实施例中，所述的导热树脂为中间掺杂了导热粉体的硅橡胶。
在本发明一个较佳实施例中，所述的导热粉体为氧化铝、氧化锌、银粉或者铝粉中的一种以及任意比例的混合物。
本发明的有益效果是：本发明的技术方案是将具有空洞结构的碳纤维织物嵌入到柔性导热树脂内，制成导热布后将导热布的外侧使用耐热绝缘的硅树脂覆盖，从而使该物品兼具以碳纤维织物为主干的高强度和快速热扩散能力的同时，还具有优秀的绝缘性能，可以防止使用中产生漏电。
附图说明
图1是本发明一较佳实施例的立体结构示意图；
附图中各部件的标记如下：
1.中间热扩散层、2.表面热传导层、3.绝缘保护层。
具体实施方式
下面结合附图对本发明的较佳实施例进行详细阐述，以使本发明的优点和特征能更易于被本领域技术人员理解，从而对本发明的保护范围做出更为清楚明确的界定。
请参阅图1，本发明实施例包括：
一种绝缘导热布，所述绝缘导热布包括：绝缘保护层3、中间热扩散层1和表面热传导层2；所述绝缘保护层3由柔性树脂组成，所述中间热扩散层1由碳纤维织物构成，所述表面热传导层2由导热树脂构成，所述中间热扩散层1嵌入在表面热传导层2内。
所述碳纤维织物为大孔碳纤维增强布，所述的大孔碳纤维增强布中间的织孔直径为0.2~0.6mm。一方面大孔碳纤维增强布可以给绝缘导热布整体提供支撑作用，提高绝缘增强布的强度，防止所述绝缘增强布在使用过程中损坏，另一方面又可以利用碳纤维的特性快速将表面热传导层从特源表面吸收的热量通过碳纤维快速传导到所述绝缘导热布的每个位置，防止热量积聚，中间较大的孔径可以供嵌入过程中导热树脂。
所述柔性树脂为硅橡胶，所述硅橡胶层的厚度为0.5mm，可以在快速扩散热量的同时有效防止漏电击穿绝缘层。
所述的导热树脂为中间掺杂了导热粉体的硅橡胶，所述的导热粉体为纳米氧化锌粉体，所述导热粉体将热量从热源表面吸收后通过树脂内形成的立体纤维网络传导到碳纤维网络上，通过碳纤维快速传导到整个导热绝缘布上。
在本发明的另一个实施例中，
一种绝缘导热布，所述绝缘导热布包括：绝缘保护层3、中间热扩散层1和表面热传导层2；所述绝缘保护层3由柔性树脂组成，所述中间热扩散层1由碳纤维织物构成，所述表面热传导层2由导热树脂构成，所述中间热扩散层1嵌入在表面热传导层2内。
所述碳纤维织物为大孔碳纤维增强布，所述的大孔碳纤维增强布中间的织孔直径为0.2~0.6mm。一方面大孔碳纤维增强布可以给绝缘导热布整体提供支撑作用，提高绝缘增强布的强度，防止所述绝缘增强布在使用过程中损坏，另一方面又可以利用碳纤维的特性快速将表面热传导层从特源表面吸收的热量通过碳纤维快速传导到所述绝缘导热布的每个位置，防止热量积聚，中间较大的孔径可以供嵌入过程中导热树脂。
所述柔性树脂为硅橡胶，所述硅橡胶层的厚度为1mm，可以在快速扩散热量的同时有效防止漏电击穿绝缘层。
所述的导热树脂为中间掺杂了导热粉体的硅橡胶，所述的导热粉体为氧化铝，所述导热粉体将热量从热源表面吸收后通过树脂内形成的立体纤维网络传导到碳纤维网络上，通过碳纤维快速传导到整个导热绝缘布上。
在本发明的又一个实施例中：
一种绝缘导热布，所述绝缘导热布包括：绝缘保护层3、中间热扩散层1和表面热传导层2；所述绝缘保护层3由柔性树脂组成，所述中间热扩散层1由碳纤维织物构成，所述表面热传导层2由导热树脂构成，所述中间热扩散层1嵌入在表面热传导层2内。
所述碳纤维织物为大孔碳纤维增强布，所述的大孔碳纤维增强布中间的织孔直径为0.2~0.6mm。一方面大孔碳纤维增强布可以给绝缘导热布整体提供支撑作用，提高绝缘增强布的强度，防止所述绝缘增强布在使用过程中损坏，另一方面又可以利用碳纤维的特性快速将表面热传导层从特源表面吸收的热量通过碳纤维快速传导到所述绝缘导热布的每个位置，防止热量积聚，中间较大的孔径可以供嵌入过程中导热树脂。
所述柔性树脂为硅橡胶，所述硅橡胶层的厚度为1.5mm，可以在快速扩散热量的同时有效防止漏电击穿绝缘层。
所述的导热树脂为中间掺杂了导热粉体的硅橡胶，所述的导热粉体为氧化铝、氧化锌的1：1混合物，所述导热粉体将热量从热源表面吸收后通过树脂内形成的立体纤维网络传导到碳纤维网络上，通过碳纤维快速传导到整个导热绝缘布上。
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。
Claims (7)
1.一种绝缘导热布，其特征在于，所述绝缘导热布包括：绝缘保护层、中间热扩散层和表面热传导层；
所述绝缘保护层由柔性树脂组成，所述中间热扩散层由碳纤维织物构成，所述表面热传导层由导热树脂构成，所述中间热扩散层嵌入在表面热传导层内。
2.根据权利要求1所述的绝缘导热布，其特征在于，所述碳纤维织物为大孔碳纤维增强布。
3.根据权利要求1所述的绝缘导热布，其特征在于，所述的大孔碳纤维增强布中间的织孔直径为0.2~0.6mm。
4.根据权利要求1所述的绝缘导热布，其特征在于，所述绝缘保护层为硅橡胶保护层。
5.根据权利要求4所述的绝缘导热布，其特征在于，所述绝缘保护层的厚度为0.5~1.5mm。
6.根据权利要求1所述的绝缘导热布，其特征在于，所述的导热树脂为中间掺杂了导热粉体的硅橡胶。
7.根据权利要求6所述的绝缘导热布，其特征在于，所述的导热粉体为氧化铝、氧化锌、银粉或者铝粉中的一种以及任意比例的混合物。
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