Four surface decoration processes of fiberglass back cover

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Following traditional plastic injection molding, glass, ceramics, composite panels, and transparent PC injection molding imitation glass, fiberglass boards, as a material with light weight, high strength, high toughness, good insulation, corrosion resistance, fatigue resistance, and designable structure and function, are made into electronic product back covers through punching/CNC (flat) or hot pressing (3D) and decorative effects. They are light, thin, and high-strength, making them an ideal material for thin back covers of electronic products such as mobile phones and tablets.

The surface decoration process of the back cover of the fiberglass board is diverse. In addition to simple spraying (without texture), there are also veneer, texture transfer, rubbing, film bonding, etc. Different surface treatment processes can give the product different visual and tactile effects.

Next, let's look at some common surface decoration processes for fiberglass back covers. (Fiberglass has two types: thermosetting and thermoplastic. The same surface treatment process has slightly different processes, so we will briefly distinguish them below.)

Fiberglass board A surface texture process

Since conventional fiberglass boards are opaque, the decorative effect of the fiberglass back cover is done on the surface, also called the A side. Different decorative layers are superimposed from bottom to top to achieve a colorful texture effect. The texture design can be an external texture or a combination of internal and external double textures.

外纹理工艺流程：

热固玻纤板裁切 → 3D压合 → 印刷底油 → UV转印纹理 → 表面硬化→ CNC精加工 → 成品

热塑玻纤板 → 印刷底油 → UV转印纹理 → 切割单体 → 热压成型 → 表面硬化 → CNC精加工 → 成品

双纹理+镀膜的工艺流程：

热固玻纤板裁切 → 3D压合 → 印刷底油 → 转印内纹理 → PVD镀膜 → 转印外纹理 → 表面硬化 → CNC精加工 → 成品

热塑玻纤板 → 印刷底油 → 转印内纹理 → PVD镀膜→ 转印外纹理 → 切割单体 → 热压成型 → 表面硬化 → CNC精加工 → 成品

Four surface decoration processes of fiberglass back cover

图聚龙高科展出的玻纤板双纹理+PVD镀膜示例

Fiberglass board + PU leather / silicone leather

PU leather or silicone leather can be laminated on the surface of fiberglass board, which can not only enhance the appearance of mobile phones, tablets and other consumer electronic products, but also bring excellent touch. Fiberglass board can be laminated after forming, or it can be formed in one piece at the same time of hot pressing.

成型后贴皮工艺流程：

热固玻纤板裁切 → 热压成型 → CNC切割 → 裁切皮革 → 覆热熔胶 → 贴合 → CNC精加工 → 油边 → 成品

一体成型工艺流程：

热固玻纤板裁切 → 玻纤+皮革模具内叠片 → 热压成型 → CNC精加工 → 油边 → 成品

热塑玻纤板 → 皮革贴合→ 切割单体 → 热压成型 → CNC精加工 → 成品

图 Redmi K60素皮·晴蓝版本外观

Fiberglass board spraying + rubbing process

The rubbing process can directly print textures on the coating liquid, reducing the cost of film transfer, and reducing the film sticking and tearing processes, reducing labor costs.

工艺流程：

热固玻纤板裁切 → 热压成型 → 喷涂primer+底气 → 喷涂UV → 3D拓印内纹理 → PVD镀膜 → 喷涂中涂 → 喷涂面漆UV → 3D拓印外纹理 → CNC精加工 → 成品

图华为Mate 60 Pro雅川青、白沙银采用玻纤板拓印工艺打造出独特纹理和触感

3D fiberglass board with transparent PU

.It can achieve the colorful effect of optical texture and the touch of leather. Transparent leather can also be combined with light to create a unique sense of technology.

工艺流程：

热固玻纤板裁切 → 热压成型 → 喷涂油墨 → 印刷logo → CNC加工 → 贴透明PU → CNC精加工 → 成品

热塑玻纤板 → 喷涂油墨 → 转印纹理 → 电镀 → 印刷光油 → 贴透明PU → 切割单体 → 热压成型 → CNC精加工 → 成品

图传音创新3D Lighting Leather技术，将彩色LED灯、玻纤板与半透明TPU皮革结合，该技术在Infinix Note 30 VIP Racing Edition上首发

除了上述工艺外，还有3D透明玻纤板背面贴纹理膜片、OMD模外装饰工艺等表面装饰工艺。

原文始发于微信公众号（雾化科技展）：Four surface decoration processes of fiberglass back cover

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