What factors affect the transparency of clothing bags in Zhejiang?

Many customers when choosing garment bags often use transparency as one of the criteria for judging quality. They usually use their eyes to compare two garment bags to see which one is more garment bags transparent Better transparency indicates better quality. However, the transparency of a garment bag does not necessarily represent its quality, because garment bags the bag's bag does not necessarily represent transparency is affected by many factors. For example, different materials will result in different transparency. So different ， materials will lead to Zhejiang garment bags having different levels of transparency depending on better quality. what factors affect ? it? Shunxingyuan Packaging, a professional soft packaging manufacturer, will explain this below.

The transparency of Zhejiang garment bags is affected by the following factors:

1. Material:

OPP material packaging bags are more transparent than PE plastic bags, and LDPE plastic bags are more transparent than HDPE plastic bags.

2. Composition:

Taking PE plastic bags as an example, if recycled materials are added, the plastic bags will turn black, affecting transparency. If fillers are added, the plastic bags will turn white, also affecting transparency.

3. Technology:

Key control points or methods during film blowing will also affect the transparency of plastic bags.

4. Raw material grade:

Even if it is the same PE material, and the same LDPE raw material, the transparency of plastic bags from different manufacturers and different grades will vary.

5 Improper adhesive selection.

The adhesive itself is dark in color; the adhesive has insufficient fluidity and poor leveling, and cannot be fully spread on the base film.

6 Process problems.

（1） The temperature at the entrance of the drying tunnel is too high or there is no temperature gradient. If the entrance temperature is too high, the drying is too fast, causing the solvent on the surface of the adhesive layer to evaporate quickly, forming a skin. Then, when the heat penetrates into the adhesive layer, the solvent below the skin vaporizes, breaking through the adhesive film to form ring-shaped objects like volcanic vents, layer by layer, making the adhesive layer opaque.

（2） Defects in the composite rubber roller or scraper, resulting in a lack of pressure at a certain point, causing opacity.

（3） Too much dust in the ambient air, and dust in the hot air blown into the drying tunnel after gluing. The dust sticks to the surface of the adhesive layer and is trapped between the two base films during lamination, creating many small spots and causing opacity.

（4） Insufficient adhesive application, resulting in blank spaces and small air bubbles, causing mottling or opacity. The amount of adhesive should be checked to ensure it is sufficient and uniform.

（5） No spreading roller or unclean spreading roller.

7 Substrate reasons.

The packaging transparency is affected by many factors. surface tension is not high enough, and the adhesive does not wet it sufficiently, resulting in an uneven adhesive film after drying, with spots, commonly known as “rough film”.

The above is an introduction to the factors affecting the transparency of Zhejiang garment bags. However, transparency cannot be the sole criterion for judging the quality of Zhejiang garment bags, but only one of the reference standards.

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