Cantonera cardboard, and process for manufacturing it

摘要

Cantonera elongated protective (10) for applying against a portion of a product during transport or packaging in order to protect that part of the product, the recoil pad comprising: at least two layers (20) of cardboard uncrimped combined together, being each layer folded in a series of sections (28) of the layers to create a first and second wings (16, 18) intersecting substantially perpendicularly at an apex (19), characterized in that each layer (20) comprises at least a first, a second, a third, a fourth and fifth sections of the layers, and is configured such that at least the first and fifth sections of the layers are superimposed and completely overlap, and the first and second wings (16, 18) have a thickness in the range from about 2.5 mm (100 points) to about 6.25 mm (250 points) and each layer (20) is made of a paperboard having a grammage about 120 to about 380 g / m2, so that the vertex (19) has a resisting force of about 45 kg (100 lbs) to about 227 kg (500 lbs), the resisting force of the apex and the thickness of the wings being related exponentially, the resisting force can be obtained by mounting the corner fitting (10) on two blocks, both having blocks (40) approximately 3.81 cm (1.5 inch) wide and being spaced approximately 25.4 cm (10 inches) and applying a force to the apex (19) in the center of the butt plate (10) until a fracture is detected, the resistive force being the force to the corner fitting is broken.