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of hardening agent

 
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PostPosted: Mon 2 Jul - 03:58 (2018)    Post subject: of hardening agent Reply with quote

three points about how to solve the tensile strength of Rubber Joint How to solve the tensile strength of Rubber Joint ?

(1) selection of hardening agent used alkyl phenolic resin hardener with system hardening nike air force 1 mens for sale , the effect is very significant. The resin is added to the compound after curing agent role, with rubber generate three-dimensional network structure, so that RAE vulcanized rubber joints Shore A hardness of 95. Phenolic resins are commonly used in phenol-formaldehyde resins, resorcinol-formaldehyde resin and an alkyl group resorcinol epoxy. The curing agents are used hexamethylene tetramine, RU-modified agent and anhydrous formaldehyde, nitrogen-containing heterocyclic compounds such as aniline.

For example nike air force 270 mens usa for sale , in the same dosage, the modified phenolic resin reinforced BQ-205A instead of general BQ-205 phenolic resin reinforced tire rubber core can increase the hardness of rubber 4-5, and other physical properties remained unchanged.

Acid hardening agent can uncured soft, easy to operate, leaving the vulcanized rubber hardens, a large number of fillers which plastic material is very useful nike air force 270 usa for sale , but also to prevent rubber scorching. In the hard tire apex added 3 parts of benzoic acid, vulcanized rubber hardness can be increased 5-6. Furthermore, oligoester, MMg (magnesium methacrylate) is excellent hardening agent.

Nitrile rubber in the rubber joints using a multifunctional acrylate oligomer and thermofusible phenol resin and used, can effectively improve the hardness of vulcanized rubber. In addition, activation of the filler surface modification nike air force 270 black gold for sale , but also a certain degree of hardening effect.

(2) Certain ingredients other methods can effectively improve the hardness of rubber, CR rubber compound such as calcium silicate and 4% of diethylene glycol (dipropylene glycol) and a silica gel compound by adding 2% to 3% of Si-69, can make to increase the hardness of rubber 3-4.

To obtain low hardness, low modulus, the first to use polynorbornene, poly-hexene (pure rubber hardness of only 12) and other low hardness of rubber nike air force 270 gold standard for sale , and secondly, with the anti-its Daoxing can achieve their goals, especially in less filler, to reduce the total degree of crosslinking and type of crosslinks adjusted, for example, M nike air force 270 mens black hyper jade for sale , DM, reducing the amount of active agent Zn0. But the key lies in selecting the right plasticizer to soften and take a variety of softening plasticizers and use. For example, IIR each added 10 parts of naphthenic oils, hardness (Shore A) decreases by approximately 6, the use of Coumarone, but increased modulus. Preparation of 15 or 30 (ie Shore A) hardness CR rubber roller nike air force 270 hyper jade for sale , often using ointment spindle oil DBP or ointment white mineral oil oil and use system.

(3) A more convenient way is to adjust the hardness of the maximum hardness (hereinafter referred to as PS) and minimum hardness (hereinafter referred to as soft) preparation of two out of the first plastic material, and then press the two different rubber compound mixing ratio after taking tablets cure, you can get the film medium hardness. This method is a simplified procedure that can improve work efficiency. Donald Trump speaks to the Trask Coliseum at University of North Carolina in Wilmington, North Carolina. REUTERSEric Thayer
WILMINGTON, N.C. - Republican presidential nominee Donald Trump suggested on Tuesday that gun rights activists could act to stop his Democratic rival Hillary Clinton from nominating liberal U.S. Supreme Court justices, igniting yet another firestorm of criticism just as he sought to steer clear of controversy.

"If she gets to pick her judges nike air force 270 red white for sale , nothing you can do folks," Trump said at a rally. "Although the Second Amendment people, maybe there is, I don’t know," he continued. The U.S. Constitution's Second Amendment guarantees a right to bear firearms.

Until Trump made the remark, he had been trying to rally Republican voters behind him and against Clinton nike air force 270 ream red for sale , who is leading in national opinion polls in the race for the Nov. 8 election. Some in the audience who were seated behind Trump could be seen wincing when he made the comment.

Clinton's campaign called the remark "dangerous."

"A person seeking to be the president of the United States should not suggest violence in any way,” it said.

When asked to clarify what Trump meant, his campaign said Trump was referring to getting supporters of the Second Amendment to rally votes for Trump in the election.

                    
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