Based on our original technology, we will use YUPO's unique high performance and high functionality
to create new value.
YUPO manufacturing method
Our proprietary manufacturing method has acquired many related patents in Japan and overseas
YUPO is a film-type synthetic paper. The main raw materials are a polypropylene resin and an inorganic filler, and a small amount of additives are added to the raw materials. In principle, the film is formed by generating microvoids through biaxial stretching.
The most distinctive feature is that YUPO has a multilayer structure consisting of a base layer and paper-like layers laminated on both sides, for all products from thick to thin. This manufacturing process is shown in the flow sheet in Figure 1.
This unique YUPO manufacturing method is based on our unique technology, and various patents related to YUPO have been issued in countries such as Japan, China, the United States and Europe.
Realization of strength in the base layer and characteristics in the surface layer.
The base layer of YUPO is stretched and oriented in the vertical and horizontal directions, and is mainly responsible for the mechanical properties such as strength and rigidity. Meanwhile, the surface layers constituting the front and back of YUPO are paper-like layers that are stretched and oriented only in the horizontal direction.
In other words, light is irregularly reflected by the large number of microvoids generated in the stretching process, so that a high level of whiteness and opacity can be obtained. Further, printing and writing properties are improved, giving paper-like properties. In addition, the specific gravity is reduced by the large number of microvoids, contributing to weight reduction. The base layer is oriented in both the vertical and horizontal directions, but the paper-like layers on the front and back are oriented only in the horizontal direction, meaning that YUPO has directionality.
Figure 2 shows a structural diagram, and Figure 3 shows electron micrographs of the surface and cross section of YUPO, coated paper, and high-quality paper, and a three-dimensional diagram of the surface.
YUPO's basic technologies and development of various applications
The properties of YUPO are not limited to those commonly found in synthetic paper, such as durability, water resistance, printability, and opacity. As shown in the conceptual diagram below, various basic technologies combine to give distinctive functions to the products.
Through synergies with the Mitsubishi Chemical Group in selection and blending of raw materials to maximize performance and functions through YUPO's proprietary manufacturing method, and synergies with the Oji Group in areas such as surface treatment and printing performance evaluation, we have accumulated a high level of technology that cannot be realized by a synthetic paper manufacturer alone.
In addition, we are expanding YUPO's functions through close technical exchanges based on long-standing relationships of trust with partner companies outside the Group that perform secondary processing for YUPO products.
Expression function (example)
|Fast drying||Light reflection||Insulation||Destruction||Absorption|
|Air permeability||Translucent||Solvent absorption||Water absorption||Against tears|
|Heat seal||Insulation||Cutting of fingers||Design||Oil absorption|
Using these functions, we design products according to customer needs and provide a wide variety of solutions.
YUPO has many achievements not only in printing applications but also in non-printing applications such as industrial films.
Please contact us for details.
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