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UHMWPE
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Ultra-high-molecular-weight polyethylene (UHMWPE or sometimes shortened to UHMW), also known as high-modulus polyethylene (HMPE) or high-performance polyethylene (HPPE), is a subset of the thermoplastic polyethylene. It has extremely long chains, with molecular weight numbering in the millions, usually between 2 and 6 million. The longer chain serves to transfer load more effectively to the polymer backbone by strengthening intermolecular interactions. This results in a very tough material, with the highest impact strength of any thermoplastic presently made.[citation needed] It is highly resistant to corrosive chemicals, with exception of oxidizing acids. It has extremely low moisture absorption, has a very low coefficient of friction, is self-lubricating, and is highly resistant to abrasion (in some forms, 15 times more resistant to abrasion than carbon steel). Its coefficient of friction is significantly lower than that of nylon and acetal, and is comparable to that of polytetrafluoroethylene, but UHMWPE has better abrasion resistance than PTFE. It is odorless, tasteless, and nontoxic. Polymerisation of UHMWPE was commercialised in the 1950s by Ruhrchemie AG, which changed names over the years; today UHMWPE powder materials are produced by Ticona, Braskem, and Mitsui. UHMWPE is available commercially either as consolidated forms, such as sheets or rods, and as fibers. UHMWPE powder may also be directly molded into the final shape of a product. Because of its resistance to wear and impact, UHMWPE continues to find increasing industrial applications, including the automotive and bottling sectors, for example. Since the 1960s, UHMWPE has also been the material of choice for total joint arthroplasty in orthopedic and spine implants.[1] UHMWPE fibers, commercialised in the late 1970s by the Dutch chemicals company DSM, are widely used in ballistic protection, defense applications, and increasingly in medical devices as well.
Legal notice
By purchasing from compass armor, you agree to be bound by these terms and conditions (the "terms and conditions"); In addition, you represent, warrant and confirm the following:
The buyer's representative shall be at least 18 years old or of full age in the state or territory in which he lives.
The buyer is not a felony at the time of purchase.
We will not sell bulletproof vests to any citizen or resident of Connecticut.
Buyer is legally permitted to purchase, own and / or use the purchased items in buyer's state / territory, county / parish and city, and confirms that such purchase does not violate any federal, state or local law.
We do not state to the buyer the legality of purchasing bulletproof masks. We make no representation as to the consequences of buyer's purchase of a bulletproof mask in violation of any applicable federal, state or local law. If buyer has any questions about federal, state or local law, buyer is encouraged to seek qualified legal counsel in its jurisdiction.
We are not responsible for the buyer's purchase, use, resale or other distribution of any bulletproof masks obtained from our store in violation of any federal, state or local laws. This disclaimer applies to any redistribution within or outside the United States.
We will work with any federal, state or local law enforcement agency to investigate the purchase or use of bulletproof masks by buyers.
Buyer does not purchase bullet proof masks on behalf of others in order to avoid compliance with these terms and conditions or to circumvent any applicable federal, state or local laws.
We will ship from Hong Kong to the international market. International buyers, please confirm the legal purchase, use and other conditions. Cooperate with customs clearance. If the buyer does not cooperate with the customs to provide documents or does not pay customs duties, resulting in the failure to deliver goods, we will not bear the relevant responsibility.
Although our bulletproof masks have been tested to resist bullets, they are bulletproof, not bulletproof. Bullet proof masks do not protect people from injury or death under any circumstances. The body armor will not provide any protection for the parts not covered by the body armor. The buyer acknowledges that there is always a risk of injury, including serious injury or death, if he is hit by a bullet while wearing a body armor.
To the maximum extent permitted by law, the buyer and its successors, assigns, successors and agents agree that we shall not be liable for any injury, including serious injury or death, that may occur during the use of our body armor. To this end, the buyer and its successors, assignees, successors and agents release, release, compensate and hold us harmless from any liability for the purchase, possession or use of bulletproof masks. The buyer and its successors, assigns, successors and agents expressly waive any right to any damages to the seller, including compensatory damages, incidental damages, indirect damages, punitive damages, fees and attorneys' fees.
Legal notice
By purchasing from compass armor, you agree to be bound by these terms and conditions (the "terms and conditions"); In addition, you represent, warrant and confirm the following:
The buyer's representative shall be at least 18 years old or of full age in the state or territory in which he lives.
The buyer is not a felony at the time of purchase.
We will not sell bulletproof masks to any citizen or resident of Connecticut.
Buyer is legally permitted to purchase, own and / or use the purchased items in buyer's state / territory, county / parish and city, and confirms that such purchase does not violate any federal, state or local law.
We do not state to the buyer the legality of purchasing bulletproof masks. We make no representation as to the consequences of buyer's purchase of a bulletproof mask in violation of any applicable federal, state or local law. If buyer has any questions about federal, state or local law, buyer is encouraged to seek qualified legal counsel in its jurisdiction.
We are not responsible for the buyer's purchase, use, resale or other distribution of any bulletproof masks obtained from our store in violation of any federal, state or local laws. This disclaimer applies to any redistribution within or outside the United States.
We will work with any federal, state or local law enforcement agency to investigate the purchase or use of bulletproof masks by buyers.
Buyer does not purchase bullet proof masks on behalf of others in order to avoid compliance with these terms and conditions or to circumvent any applicable federal, state or local laws.
We will ship from Hong Kong to the international market. International buyers, please confirm the legal purchase, use and other conditions. Cooperate with customs clearance.
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