ASO Co., Ltd.

Common materials used for manufacturing plastic bags include low-density polyethylene (LDPE) and linear low-density polyethylene (LLDPE).

LDPE is a highly pure polymer immediately after polymerization. 

In contrast, LLDPE, which is produced by ion polymerization, inevitably generates additive-derived particles. In addition, to improve film productivity and the efficiency of bag manufacturing processes, various additives such as antioxidants (BHT), fatty acid-based lubricants, and silica-based anti-blocking agents are typically added in amounts ranging from hundred to several thousand ppm.

As a result, after the inflation and bag manufacturing processes, these additives bleed out from within the film, leading to the formation of agglomerated particles on both the inner and outer surfaces of the bag. Since these surfaces come into contact with the packaged products, one of the major challenges with standard polyethylene is how to suppress the formation of additive particles that may contaminate the products during filling or packaging.

These particles continue to bleed out from the plastic film over time. For example, you may have noticed white powder adhering to the surface of plastic bags stored for about a year, which is caused by this bleed-out phenomenon.

To address these concerns, our High Clean Poly Bags are made from additive-free LDPE. 

This allows safe use without concern for contamination of the contents due to bleed-out.

The table below compares the number of particles measured on standard plastic bags and our Bags.

Packaging is an important factor in maintaining the cleanliness of clean plastic bags. As the inner packaging bag of clean bags, which comes in contact with them, we use a clean bag of the same material to keep them clean. We can also deliver our clean bags in double or triple inner packaging so that they can be unpackaged in order in an anteroom.

As the outmost package, "UV Cut Clean Cloth Sheet" is used. With its excellent shock resistance, 

"UV Cut Clean Cloth Sheet" protects Clean Poly Bags in transit securely. This UV protection sheet cuts 99% of 380 nm and shorter wavelengths, which promote ultraviolet degradation, and protects plastic bags in storage from degradation by ultraviolet light from ultraviolet germicidal lamps.

The combustion catalysis effect of the sheet makes it an environmentally friendly, hybrid packaging material that, when incinerated, inhibits the production of dioxins from other waste (of course, this product does not produce dioxins) or reduces NOX in exhaust gas.