Puncture- and rupture-resistant special-purpose sheet aluminum-plastic packaging film

Abstract

The invention relates to a puncture- and rupture-resistant special-purpose sheet aluminum-plastic packaging film which belongs to the field of novel packaging materials for medicine, food and other irregular-shaped objects. The film is characterized by being a composite of polyester film and hard aluminum foil. The film comprises, by weight percentage, 25% of polyester film and 75% of hard aluminum foil. The outer surface of the hard aluminum foil is evenly coated with a heat-sealing adhesive (VC), and the polyester film and the hard aluminum foil are bonded together by an adhesive. The amount of air permeability is largely reduced; the rupture strength is improved as well as the toughness and the rigidity; and the heat seal strength is reinforced. Compared with common aluminum-plastic composite materials, the film is substantially improved in performance, as the film obtains puncture-resistant and rupture-resistant features. Compared with composite materials of nylon, soft aluminum foil and polyethylene, the film is not much different in performance indices, while the cost is much lower.

Description

technical field [0001] The invention relates to a puncture-resistant and anti-crack special sheet-shaped aluminum-plastic packaging film, which belongs to the field of new materials for packaging medicine, food and other irregular items. Background technique [0002] Aluminum-plastic composite film is composed of soft aluminum foil (alloy grade 8011-O), polyester film (PET) and polyethylene film (PE). It is widely used in medicine, food, etc. The packaging of the product, but the product itself has poor toughness and rigidity. If it encounters a blocky or irregular hard product, it is prone to cracking and cannot guarantee the safety of the product. Nylon composite soft aluminum foil composite polyethylene formula is commonly used in foreign countries. This product has the performance of puncture resistance and crack resistance, but its tear resistance is high, it is not convenient to take, and it is not convenient for the packaging of medicines and foods. The product needs...

AI Technical Summary

Problems solved by technology

[0002] Aluminum-plastic composite film is composed of soft aluminum foil (alloy grade 8011-O), polyester film (PET) and polyethylene film (PE). It is widely used in medicine, food, etc. The packaging of the product, but the product itself has poor toughness and rigidity. If it encounters a blocky or irregular hard product, it is prone to rupture and cannot guarantee the safety of the product.

Nylon composite soft aluminum foil composite polyethylene formula is commonly used in foreign countries. This product has the performance of puncture resistance and crack resistance, but its tear resistance is high, it is not convenient to take, and it is not convenient for the packaging of medicines and foods. The product needs to go through secondary compounding and secondary curing. The production cycle is long and the process is complicated, resulting in high product cost.