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Definition and common scenarios of hand-held vest bags
Hand-held vest bags, also known as vest bags and supermarket hand-held bags, are one of the most common plastic packaging bags in daily life. Its design features are handles on both sides, which resemble a vest, hence the name. This type of bag is widely used in supermarkets, convenience stores, shopping malls and other scenes. It is mainly used for packaging and carrying goods. It is usually printed with the brand logo of the merchant having both practicality and advertising functions.
Material and characteristics: the difference between PE and PO
The main materials of hand-held vest bags are PE or PO. The physical properties and application scenarios of the two are slightly different:
PE material: soft texture, high transparency, commonly used in thinner bags (such as lightweight bags used in fresh food areas). PE bags have good toughness and ductility, suitable for goods with smaller load-bearing capacity.
PO material: low gloss, hard texture with a "rustling" sound when shaken. PO vest bags are usually made of new materials, non-toxic and odorless, with high hardness and strong tear resistance. They are the preferred materials for medium and thick packaging bags in supermarkets.
It is worth noting that some merchants will use mixed materials (such as BOPP/CPP composite film) to enhance the sealing and moisture resistance of the bag. This type of design is mostly used for food packaging or goods that need to be stored for a long time.
Specifications and classification: Standardization of size and thickness
The specifications of supermarket hand-held vest bags are usually divided into three categories:
- Small size: about 25-30 cm wide, suitable for small items such as snacks and daily necessities.
- Medium size: about 35-40 cm wide, commonly seen in fresh fruit and vegetable areas.
- Large size: more than 45 cm wide, mostly used for large items or family bulk purchases.
The thickness of the bag is generally about single-layer 3 silk (0.03 mm), and some high-end brands (such as Sam's Club) may use thicker materials to increase the load-bearing capacity.
Quality and transparency: from function to environmental protection
The transparency of a hand-held vest bag is closely related to its material and purpose:
- Fully transparent: mostly used to display the appearance of goods, such as clothing and electronic product packaging.
- Translucent milky white: commonly seen in PO material bags, it takes into account both privacy and product recognition, such as the thick milky white vest bag of Sam's Club.
In recent years, environmental protection policies have pushed supermarkets to reduce the use of disposable plastic bags, and some merchants have turned to degradable materials (such as PLA) or non-woven materials. For example, Walmart once proposed a "zero waste plan" to gradually promote recyclable environmentally friendly bags, but its traditional PE/PO vest bags still occupy the mainstream market.
International supermarket case: Walmart and Sam's packaging bag design
Taking Walmart and its Sam's Club as an example, its vest bag design reflects the brand characteristics and functional requirements:
Sam's Club: uses thick PO vest bags with milky white translucent design,printed with a conspicuous brand logo. This kind of the bags can bear a load of more than 10 kilograms, which is in line with its bulk purchase consumption scenario.
Walmart's regular stores: mainly made of PE material, with a variety of sizes available. Some stores implement a paid bag policy in response to environmental protection initiatives.
Future trends: Functionalization and sustainability
With technological advances, hand-held vest bags are gradually developing towards functionalization. For example, special bags for fresh produce with antibacterial coatings, resealable zipper bags, etc. At the same time, international supermarket brands are exploring the marketing strategy of "bags as a medium" to enhance the interaction between consumers and brands through customized designs.
From material selection to size classification, the design of hand-held vest bags shows a balance between function, cost and environmental protection concepts. As consumers, understanding its characteristics can not only help us use it more rationally, but also promote the industry to move towards sustainable development. Next time you go shopping, you might as well pay more attention to the vest bag in your hand - it is not only a carrier of goods, but also a microcosm of modern retail.
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