Shanghai Sunland Industrial Co., Ltd is the top manufacturer of Personal Protect Equipment in China, with 20 years’experience. We are the Chinese government appointed manufacturer for government power,personal protection equipment , medical instruments,construction industry, etc. All the products get the CE, ANSI and related Industry Certificates. All our safety helmets use the top-quality raw material without any recycling material.
The safety helmet meets the national standard
We provide exclusive customization of the products logo, using advanced printing technology and technology, not suitable for fading, solid and firm, scratch-proof and anti-smashing, and suitable for various scenes such as construction, mining, warehouse, inspection, etc. Our goal is to satisfy your needs. Demand, do your best.
Professional team work and production line which can make nice quality in short time.
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and elastic modulus of the outer metallic ,shell, and inner poly-meric ,liner, are denoted by t; E and tp; Ep respectively. The radius of the cylinder, deﬁned as the ,distance between, center and the neutral surface, is denoted by R (see Fig. 1A). Ateach ,shell, cross section, the axes x, y and z are oriented along
1/7/2016, · A proper fit is typically defined as a small and uniform ,distance between, the ,helmet liner, and the wearer's head shape, with a broad coverage of the head area. This paper presents a novel method to investigate and compare fitting accuracy of helmets based on 3D anthropometry, reverse engineering techniques and computational analysis.
The inner lining of Samshield helmets is made of “shape memory”-material, which ensures a constant thickness over the years of use and the semi-rigid jugular cancels all risks of tipping the ,helmet, in case of a violent movement. This internal comfort foam is removable thanks to a strong clip system. It can therefore be washed at will in order to constantly be able to wear a clean and ...
The ,helmet, has a separate “3D” mesh ,liner, in-,between, the top of the regular ,liner, and the plastic vent tube assembly. This helps to create some space to enhance air flow. The system works well to flow air along the top ,of the helmet,, although we have to admit it doesn’t quite have the type of “Wow, I can feel it!” ventilation as, say, the Shoei GT Air (review) or the Caberg Ego ...
You strap the ,helmet, on the headform, turn it upside down so the ,helmet, hits the anvil first and drop it onto the anvil. The ,helmet, is oriented before each drop to test it's most vulnerable areas. The variables in the test include the drop height and the shape of the anvil: flat, round, ridge-shaped, pointy or in one case a shape that simulates a horseshoe.
Each M-1 ,helmet shell, was stamped from a single sheet of manganese steel. The ,helmet, has a chin strap "bail" or "bale" -- a rectangular wire loop -- on each side attached with either a hinge or welded directly to the ,helmet,. A second component was the M-1941 ,helmet liner,, a removable inner ,helmet, constructed of resin-impregnated cotton canvas.
Its hard ,shell, resists penetration by sharp objects. And its suspension system lessens the consequences of a localized blow by distributing the force over a broader area. The most common type of suspension system, a network of straps connected to a headband attached to the ,helmet,, holds the ,shell, at least 1.25 in (3 cm) away from the wearer's head.
Unlike the typical European ,helmet,, this one has a dearth of markings, only this single serial number appears lightly on the inside skirt. The typical drawstring adjustment in the crown of ,the liner, affords varible ,distance between, the top of the wearers head ,and the shell of the helmet,. This is the only adjustment point available on this ,liner,.