1. Bubble diameter: generally, it is mainly 6mm, 10mm, 28mm. There are also 20mm (not very common) and cardioid bubbles (special appearance, not as compressive as round bubble).
Among them, the most common one is the one with a bubble diameter of 10 mm, which has a wide range of compressive capacity. 6mm is characterized by beautiful appearance and very neat bubble. It is suitable for telephone and other products with external packaging, mainly anti-wear and shock absorption.
20-28mm bubble diameter, all belong to big bubble, characterized by high bubble height, the thickness of general film will be thicker, and the bubble bag has the best cushioning and shockproof effect.
The following figure shows the bubble diameter of 6mm, 10mm and 28mm from left to right.
2. Thickness: this thickness is not the height of the bubble, but the thickness of the film (several threads). It's easy for new people to have ambiguity here. Because it is impossible to measure the thickness of bubble film directly with micrometer, it is generally used to say how many grams per square meter (similar to 70g, 80g for A4 paper). The bigger the weight, the stronger the pressure and the harder the hand feel. In the figure below, the size and height of the two bubble films are the same, that is, one is light and the other is heavy.
a) The common thickness of 10 mm bubble diameter ranges from 35g / ㎡ to 100g / ㎡. It can also be made thicker, such as 200g / ㎡, but for users, the cost is too high, so it is rare. According to experience, the thickness of 65g-85g / ㎡ is a good choice, with good compression resistance and low cost.
b) The common thickness of 6mm bubble diameter is also from 35g / ㎡ to 100g / ㎡. According to experience, this kind of vesicle is suitable for 50g-70g / ㎡.
c) The thickness of 20-28mm bubble diameter can be used from 100g-200g / ㎡. The most commonly used is 200g / ㎡. Because the bubble is big, if the thickness is too thin, it is easy to explode. Therefore, the common thickness is thicker than that in the vesicles.