The glue with good performance also has a large change in melt viscosity with temperature. Specifically: when the use temperature rises above 150 degrees, the melt viscosity of the glue can be quickly reduced, so that the coating can maintain proper permeability; and when the temperature of the glue is lowered, the viscosity of the glue can quickly increase. , and quickly solidifies, thus ensuring the effect of rapid limb binding. Hot melt adhesives can maintain good permeability only if they have a suitable melt viscosity, which is very important for glue binding. But too low melt viscosity will cause insufficient amount of glue on the back of the book. The melting degree of hot melt adhesive is more suitable in the range of 4000-5000 centipoise. Good adhesion and penetration performance, that is, when the equipment is running at high speed, the glue must be able to quickly infiltrate the spine of the book, and have excellent cohesion, which can ensure "no wire drawing", and will not crack or fall apart after cooling. In order to achieve this goal, changing the composition of the glue is one aspect. The key is to improve the cohesion and toughness of the base resin, and to introduce strong adhesive force, hard quality, low melt viscosity into the composition, and when the temperature changes up and down, Resins that dissolve or set rapidly. Adhesives with good performance should also have good tensile strength. The phenomenon of loose pages, falling pages, and breaking during the use of adhesive books is directly related to the tensile strength of hot melt adhesives. The tensile strength is usually 20-30kg/cm2. Hot melt adhesives must have good elongation. The elongation at break is high, and the toughness of the hot melt adhesive is good; only with good toughness can the book not be easily broken. The elongation requirement is greater than 300%
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The car was broken when it was far from the repair point. It was really a headache. If you have equipment, you should pay attention to the maintenance of the car after you have a car.
When it comes to car maintenance, chassis care is most likely to be ignored by driver friends, but the importance of the maintenance of the chassis in winter or wet weather is obvious. In the winter, it is necessary to thoroughly clean the chassis and prevent rust. First of all, the chassis should be thoroughly cleaned. If there is too much mud on the chassis, it must be washed again with an oil-removing detergent to expose the chassis to the original “natural†color so that the rust preventive care can be started. In a professional beauty shop, the car can be lifted to a lifting rack for chassis cleaning, wiping, and rust prevention. In the middle of this should pay attention to, after the cleaning must be sure to wait until the water on the plate after the dry, in order to carry out anti-rust care. When performing care, be sure to maintain a uniform spray coating to form a durable layer of uniform anti-rust coating. After the completion of all the natural air drying 5-10 minutes, the chassis rust treatment is completed.
Vehicle Chassis Damage Emergency Maintenance Tips After completing professional chassis care, it does not mean that it is completely foolproof. One misunderstanding is that people often wash their cars themselves for the purpose of car love, and often add some detergents. Please do not use alkaline cleaners? Washing powder and so on? Rinse the body and chassis, otherwise it will affect the anti-rust effect and shorten the anti-rust time.
It is recommended that you go to a professional beauty shop to do card care. There is a simple way to check out the quality of the product. After the high-pressure water jet washing, the chassis of the rust-proofing care is almost not hung. This effect means that it is genuine. Care can play a very good rust protection effect.
Vehicle Chassis Parts Damage First Aid When the vehicle is damaged in the field or away from the vehicle repair location and the chassis components are damaged, the following emergency methods can be used to drive the vehicle to the conditions for repairing the vehicle.
Brake cylinder leakage brake fluid or the branch pipeline broken, can be used in the branch of the pump pipe with tin, copper skin to be a small mat, block the pipeline, and then tighten the screws, or the fracture flat, The curling is blocked, so that the wheel can not be used as a brake. However, doing so may cause unilateral braking, and should pay attention to safety when driving.
The brake master cylinder lacks brake fluid and can be replaced with alcohol or liquor. In special cases, fresh water can be used instead. Brake cups rise and the soaked skin cups are soaked in hot water for 10 minutes to 20 minutes to remove the oily components from the bowl so that the cups can be restored to their original size.
The clutch friction plate is ablated and slippery, and the friction plate that is less severe for ablation can be turned over. If the ablation is severe, several layers of cotton or canvas can be used, with steel wire or wire passing through the holes in the steel sheet to fix it. When driving a vehicle, it should be done steadily and the gear shifts quickly.
The tie rod ball joint is broken. In the bumper or other places that do not affect the driving, remove a screw with a total length similar to the ball joint to replace the broken ball joint. After installing the knuckle arm and nut, expose the screw. Partially riveted with a hammer. Damage to the triaxial automobile differential gear, such as damage to the differential in the rear axle and the rear axle, can remove the driveshaft and the axle from the axle and continue driving. If the front differential is damaged, the hub splint can be removed and continued. 
Chassis Damage Emergency Repair Tips