Water Resistance Kraft Bubble Mailers Shipping Envelopes Size 1 / 7.25"X12"
Commercial Kraft Bubble Mailers Padded Envelopes Size 1 / 7.25"X12"
Also named: kraft paper envelope / express bag
Material: kraft paper /PE
Structure: the outer layer is kraft paper (white, yellow, or native), lined with bubble film
Effect: the outer layer of kraft paper (white, yellow or grey) smooth surface, easy writing; can not infringe intellectual property rights in the case of different printing patterns, trademarks and text according to customer requirements; lined with bubble film, buffer shock, to prevent the goods due to pressure, touch, drop and damage; do not use any adhesive each layer of material, non-toxic environmental protection; self-adhesive envelope design, safe and convenient;
Advantage:
Durability and outstanding tear strength.
High-slip film material allows faster, easier product insert.
Clean ,safe and easy to use, the kraft surface is easy for writing
Lightweight and small volume for postage savings
| Data Sheet | |
| Materials Classification : | AL |
| Melting Point : | 660℃ |
| Working Temperature : | -180~240℃ |
| Material Density : | 2.7g/cm³ |
| Conventional Size : | 7.25"X12" #1 |
| Sample Color : | Gray |
| Basic Material : | Aluminum Foil |
| Protruding Characteristics : | Barrier |
| Application Industry : | Promotion |
| Shape Style : | Drawstring |
| Materials introduction | |
| Aluminum is a silvery white light metal. Ductility. The products are usually columnar, rod, flake, foil, powder, ribbon and filiform. A layer of oxide film to prevent metal corrosion can be formed in humid air. The acid treated aluminum powder heated in the air can burn violently and emit a dazzling white flame. Soluble in dilute sulfuric acid, dilute nitric acid, hydrochloric acid, sodium hydroxide and potassium hydroxide solution, insoluble in water, but can react with hot water slowly to produce aluminum hydroxide, the relative density of 2.70, elastic modulus 70Gpa, Poisson's ratio 0.33. Melting point 660. Boiling point 2327. It is widely used for its light, good conductivity and thermal conductivity, high reflectivity and oxidation resistance. Do the daily dish aluminum is usually called "steel" or "steel". The thermal expansion coefficient of Al at (25) Shi Wen is 0.0000236mm/ C or 23.6ppm*k-1. | |
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