What materials are generally used for tea bag packaging?
1.PE bag (plastic bag)
Polyethylene bags, or PE bags, are currently a widely used packaging material. There are generally two types: low-density PE bags and high-density PE bags. Low-density PE bags are more moisture-permeable and air-permeable, while high-density PE bags are smaller.
The advantages of PE bags are that they are economical, cheap, and have good moisture-proof properties. However, their disadvantages are that they have poor light transmission and gas-proof properties, so they cannot be used individually for tea bag packaging. When using polyethylene bags for packaging, it is best to add a layer of external packaging that can block light and have low air permeability, such as synthetic paper cans, iron cans, etc.: PE bags have greater air permeability, and it is difficult to solve the oxygen problem in the packaging bags, which is not ideal. packaging material.
2.Metal tin can
The advantages of metal tin cans are extrusion resistance and good texture. In the early days, they were mainly used with PE bag inner packaging for tea bag outer packaging. However, due to their high price and easy corrosion, rust and deformation, they have been gradually eliminated. The paint smell inside the metal can and the lid is not tight enough and should not be used alone.
3.Synthetic paper can
Synthetic paper cans are currently the most widely used packaging material. They have the advantages of being economical, lightweight, and beautiful. However, they are still highly breathable and moisture permeable. They are not suitable for use alone. They are best used with PE bags or aluminum foil laminated bags for inner packaging. This article is reproduced from: West Lake Longjing Information Platform.
4.Aluminum foil laminated bags
Aluminum foil laminated bags are beautiful and elegant. Their advantages are that they are opaque, moisture-proof and oxygen-barrier. However, they are more expensive than PE bags and may cause extrusion problems when used alone. Aluminum foil laminated bags can be vacuumed or filled with nitrogen or treated with deoxidizer. When used with packaging cartons or synthetic paper cans, the moisture-proof, air-blocking, light-proof and oxygen-free storage of tea can be perfectly solved. Low-temperature storage is the best solution for tea. Perfect preservation method.
5.Glass jars, magnetic jars, wooden boxes, paper boxes
Although glass jars have excellent air and moisture resistance, they are light-transmissive, fragile, heavy, and expensive. Magnetic jars or earthenware jars can protect from light but are fragile and heavy like glass jars. If wooden boxes are not handled properly, they can easily cause the tea to absorb odors and absorb moisture. Paper boxes or paper bags can easily absorb moisture and break. These materials are not ideal tea packaging materials. .
6.Nitrogen filling or vacuum bag packaging
Since the packaging bag will shrink in vacuum packaging, in order to avoid further extrusion and collision and for aesthetic reasons, outer packaging protection should be added. Nitrogen-filled packaging will cause the bag to swell and cannot be squeezed to avoid bursting the bag. Both require outer packaging and have good preservation effects, but the investment is more expensive.
Food bag paper plastic composite bag.
