印刷折叠盒如何选择PET片材

01 What Does a Printed Folding Box Require from PET Sheet?

Transparent plastic folding boxes are used for cosmetics, gift packaging, stationery, toys and retail product displays. Their main attraction is simple: customers can see the product while the packaging still carries printed graphics, branding and product information.

For the printing and converting company, however, a good-looking transparent sheet is only the starting point. The material must also pass through printing, die-cutting, creasing and folding without creating unacceptable appearance or processing problems.

我们通常关注五个与表格相关的要求： 光学透明度、表面清洁度、印刷附着力、 合适的刚度和一致的厚度。 如果忽略其中一项，问题可能就不会出现 变得可见，直到纸张到达 转换线。

02 为什么我们推荐原始 APET 用于印刷折叠盒

对于这个特定的应用，我们的建议 很简单：从原始 APET 开始 而不是将所有 PET 片材等级视为可互换。

优质透明折叠盒即使很小也能暴露出来 板材外观的差异。轻微的颜色变化， 可见颗粒、凝胶或表面缺陷可能很多 在这里比在应用程序中更引人注目 片材不透明或被其他包装材料覆盖。

Virgin APET给了我们一个更合适的起点 用于控制这些外观要求。 它也是一种实用的印刷材料， 模切和折叠时的片材等级和 加工条件匹配得当。

为什么我们这里一般不推荐RPET？

RPET can be a useful material in many packaging applications, including thermoformed trays and containers. But for premium transparent printed folding boxes, our material preference is different.

Depending on the recycled feedstock and production controls, RPET may introduce additional challenges with color consistency, visible particles, gels and surface appearance. These differences matter when a customer expects transparent packaging to look consistent across repeated orders.

这并不意味着每个 RPET 等级都不适合 用于打印。这意味着，对于折叠盒 这里讨论的应用程序，通常是 DESU 建议使用原始 APET 更合适 材料方向。

03 使表面处理与印刷工艺相匹配

最常见的购买错误之一是 仅指定 “清除宠物纸” 当材料 实际上会被打印。

片材可以具有出色的透明度，但仍然 需要额外的表面处理 选择的墨水系统。这就是为什么我们询问 确认单张前的打印方法 规格。

DESU 可以讨论可定制的电晕处理 在规定的范围内 38–52 达因/厘米，取决于 项目要求。目标治疗水平 应根据墨水系统进行选择， 印刷工艺和加工商的附着力标准。

Corona treatment is not a permanent guarantee of printability. Surface condition may change during storage, and the treatment level alone cannot predict how every ink will perform.

因此，我们建议检查实际情况 具有代表性的印刷和附着性能 批准生产订单之前的材料。

04 清晰度、表面清洁度和划痕控制

Transparent folding boxes leave little room to hide material defects. Fine scratches, surface marks, haze or visible particles can become obvious under retail lighting, particularly against dark products or printed backgrounds.

For this reason, surface quality should be treated as part of the purchasing specification, not merely as a visual preference.

We pay attention to sheet appearance, surface finish and appropriate slip behavior because these factors influence handling during printing, stacking and die-cutting.

However, no sheet grade can completely eliminate scratching during conversion. Machine contact, stacking pressure, protective measures and handling practices also affect the finished result.

If a project has particularly demanding appearance requirements, buyers should discuss surface protection options and confirm their compatibility with printing and folding.

05 Choosing APET Thickness for Die-Cutting and Folding

For the folding-box and printing applications discussed here, our recommended starting thickness range is 0.25–0.50 mm。

准确的厚度应反映成品的厚度 箱体尺寸、所需刚性和 转换器的切割和压痕过程。 选择最厚的板材并不总是 最好的解决方案。

较厚的 APET 片材可以提供更好的面板 刚度，但它也可以增加折叠性 阻力并对折痕提出更高的要求 设计。较薄的纸张可能更容易折叠 但可能无法提供足够的刚性 较大的盒子或较重的内容。

Virgin APET 是合适的原材料 用于干净的模切和折叠，但是 折痕外观取决于 材料和转换器的过程。

我们宁愿查看样品盒或 推荐前折叠要求 特定的规格而不是假设的厚度 适用于每种设计。

06 卷材宽度、平整度和供应格式也很重要

即使材料等级正确， 不合适的卷筒规格可能会造成 打印过程中出现不必要的问题 转换。

Sheet curl, thickness variation and inconsistent winding can affect feeding, registration and cutting performance. For printed packaging, these issues may also influence the alignment of graphics and die-cut positions.

Before placing an order, confirm the required width, thickness tolerance, roll core, winding direction and any roll diameter restrictions. If the process uses cut sheets, specify the dimensions and flatness requirements.

For treated material, the treated-side orientation should also be included in the supply specification.

DESU 供应卷状 PET 材料和 图纸格式。最实用的货源 格式取决于转换器的方式 供给和加工材料。

07 试生产时应检查哪些内容？

对于一个新的印刷折叠盒项目， 我们建议通过以下方式评估该工作表 实际的转换顺序 而不是仅仅从外表上认可它。

印刷及粘合

检查所需的墨水系统 指定的处理表面。检查附着力 经过相关干燥、固化后 和处理条件。

模切和压痕

确认切割一致性和外观 对于不可接受的泛白或开裂 沿着预期的折叠。

表面外观

打印后检查材料， 不仅可以堆叠和折叠 加工前。

生产投料

检查平整度、卷曲度和进给行为 使用供应格式代表 预期的生产订单。

08 为您的折叠盒项目索取原始 APET 板材

如果您生产透明印刷 折叠盒，最有用的入门 要点是对您的清晰描述 材料和印刷要求。

您无需敲定每一个细节 在联系我们之前。我们可以讨论 基于合适的 APET 片材方向 根据您的应用和加工需求。

If you already have a sample or drawing of the folding box, sharing it can help us understand the required stiffness, surface appearance and converting conditions.

For more product information, see our 印刷用 PET 片材 或者 可印刷的 PET 片材卷 pages.

Looking for virgin APET sheet rolls for printing and folding boxes? Contact DESU Plastic with your material requirements to discuss specifications and samples.

09 常见问题