A nyloc nut, also referred to as a nylon-insert lock nut, polymer-insert lock nut, or elastic stop nut, is a kind of locknut with a nylon collar that increases friction on the screw thread. Nylon Lock Nut,Nylock Style Nuts,Nylon Lock Nuts And Bolts,Stainless Steel Nylon Lock Nuts Taizhou Risco Stainless Steel Products Co.,Ltd , https://www.riscofastener.com
Methanol mainly acts on the nervous system and has obvious anesthetic effects, which can cause brain edema. It has a special selection effect on the optic nerve and retina, which is easy to cause optic nerve atrophy, leading to blindness in both eyes. Methanol vapor has a strong stimulating effect on the respiratory mucosa. The toxicity of methanol is related to the accumulation of formaldehyde and formic acid in its metabolites.
one. Clinical manifestation
The main target organs damaged by acute methanol poisoning are the central nervous system, optic nerve and retina. The incubation period of inhalation poisoning is generally 1 to 72 hours, and there are also 96 hours; oral poisoning is mostly 8 to 36 hours; if ethanol is taken at the same time, the incubation period is longer.
1. Irritating symptoms Inhalation of methanol vapor can cause eye and respiratory mucosal irritation.
2. Patients with mild poisoning often have dizziness, headache, dizziness, fatigue, gait, insomnia, indifferent expression; digestive system and other symptoms such as nausea, vomiting, and upper abdominal pain.
3. Moderate poisoning before the eyes, flashing, blurred vision, eye pain, photophobia, diplopia, etc.; pupil dilation or shrink, slow response or disappearance of light, papilledema, peripheral retinal congestion, hemorrhage, edema; Can be complicated by liver damage. Oral poisoning can be complicated by acute pancreatitis; convulsions, coma and epilepsy-like convulsions; a few cases with tachycardia, myocarditis, acute renal failure.
4. Severe severe poisoning, severe headache, nausea, vomiting, and sharp decline in vision can cause persistent blindness. There are optic atrophy; severe poisoning may have symptoms of extracorporeal damage or Parkinson's syndrome; consciousness, convulsions, convulsions and coma, severe cases of purpura, deep and rapid breathing, and finally death due to respiratory failure.
two. first-aid
1. Immediately leave the scene, rinse the contaminated skin with water, and take the stomach thoroughly with 3% ~ 5% sodium bicarbonate solution.
2. Antidote: Ethanol is an antagonist of methanol poisoning. The use of ethanol can prevent methanol oxidation and promote methanol excretion, but patients with obvious inhibition are hanged. 50% ethanol aqueous solution or high concentration white wine 30ml orally or gastric tube, 3 ~ 4h once; or 10% glucose solution into a 5% ethanol solution, intravenous infusion.
3. Blood or peritoneal dialysis removes absorbed methanol and its metabolites.
4. Support and symptomatic treatment: Actively prevent and treat cerebral edema according to the condition, reduce intracranial pressure, improve fundus blood circulation, and prevent optic neuropathy. Maintains respiratory and circulatory functions and maintains electrolyte balance. Give a lot of B vitamins.
5. According to blood gas analysis or carbon dioxide binding force determination and clinical manifestations, early administration of sodium bicarbonate solution or sodium lactate solution to correct acidosis
The nylon collar insert is placed at the end of the nut, with an inner diameter (ID) slightly smaller than the major diameter of the screw. The screw thread does not cut into the nylon insert, however, the insert deforms elastically over the threads as tightening pressure is applied. The insert locks the nut against the screw as a result of friction, caused by the radial compressive force resulting from the deformation of the nylon. Nyloc nuts retain their locking ability up to 250 °F (121 °C)
                                        Â