brown paper shopping bags

Why use sealable paper bags? Because they can be resealed and reused multiple times.

1. The core advantage of sealable paper bags lies in their "resealing" function. Through structures such as self-sealing strips, zipper seals, and snap seals, they achieve a cycle of "opening - taking out - sealing": ① Self-sealing strips can be reapplied ≥10 times. After each seal, the oxygen permeability is ≤5cc/m²・24h, and the water vapor permeability is ≤3g/m²・24h, effectively isolating air and moisture; ② Zipper seals (metal or biodegradable PLA plastic zippers) can be opened and closed ≥50 times, with a sealing strength ≥8N/25mm. Even when containing granular or powdery items (such as coffee beans or flour), leakage will not occur due to compression. This solves the cumbersome problem of traditional paper bags requiring clips or ropes to seal after opening, and is suitable for the consumption habit of "repeated use" (such as taking 1-2 cookies per day or 50g of flour each time). Long-lasting freshness preservation, extending product shelf life

 

2. For food applications, the sealable function can significantly extend product shelf life: ① For moisture-absorbing foods (such as biscuits and bread), sealing can extend the crispness retention time by 2-3 times (ordinary paper bags become soft after 3 days, while sealable paper bags remain crisp for 7-10 days); ② For easily oxidized foods (such as coffee beans and nuts), high-barrier sealing can reduce oxygen contact, increasing the flavor retention rate of coffee beans to over 90% (ordinary paper bags lose 30% of their flavor after 1 month, while sealable paper bags only lose 10%); ③ For foods that need to be protected from light (such as tea and traditional Chinese medicine slices), a customized "kraft paper + light-blocking coating" structure can be used to seal and block ultraviolet rays, preventing nutrient loss and meeting the core needs of the food industry for "freshness preservation and flavor protection". 3. The sealable structure effectively isolates external dust, insects, and pollutants: ① In home storage scenarios, using sealable paper bags to store clothes and stationery can avoid the hassle of cleaning and wiping caused by dust accumulation; ② In outdoor scenarios (such as picnics and camping), sealing can prevent ants and insects from coming into contact with food; ③ In industrial scenarios (such as electronic component storage), it can block workshop dust from entering, ensuring the cleanliness of components and reducing the risk of subsequent assembly failures.