The so-called roll bags are connected one after another with pre-cut perforations, and when rolled up, they form compact rolls. Roll bags are very common in daily life—they are widely used for packing vegetables and fresh produce in supermarkets, facilitating customers' shopping experience. The quality of roll bags directly determines whether they are suitable for food contact and household use. So how can we tell the good from the bad? Let supermarket roll bag manufacturers share some practical tips.

1. Judge by Appearance and Labeling

• Visual & Tactile Inspection: High-quality roll bags are usually transparent (natural color) with a smooth surface and a slippery feel when touched. In contrast, low-quality ones are often dark and opaque, featuring a cloudy, dull surface and a sticky texture. Therefore, opt for transparent, natural-color roll bags as they offer higher safety. Most dark, opaque roll bags are made from recycled waste plastic bags, which are unfit for food packaging.
• Quality Certification Mark: Look for the "QS" mark printed on the surface of the roll bags—this mark indicates the intended use scope, helping you identify qualified products easily.

2. Evaluate by Combustion Test

• Qualified Products: When burned, high-quality roll bags emit an odor similar to burning candles and produce dripping substances like candle wax. Such roll bags are safe for food contact and healthy to use.
• Unqualified Products: Poor-quality roll bags are difficult to ignite. When burned, they release black smoke with a pungent odor, indicating they are substandard and potentially harmful to human health.

3. Environmental Note

Plastic bags are inherently non-biodegradable and have low recycling rates, leading to resource waste and environmental pollution. Therefore, please prioritize environmental protection when using roll bags or other plastic products in daily life.

The above are professional insights from supermarket roll bag manufacturers. We hope this information helps you better understand how to select and use roll bags. If you have any needs or inquiries, feel free to contact Shenzhen Sayru Technology Co., Ltd.

Article Title: Supermarket Roll Bag Manufacturers Teach You How to Distinguish Roll Bag Quality URL: https://en.szxylp.com/technical-data/supermarket-roll-bag-manufacturers-teach-you-how-to-distinguish-roll-bag-quality.html