product name |
Loctite 680 glue, Loctite 680 component retaining glue, 680 glue |
Region oriented |
|
Place of Origin |
Yantai, Shandong |
Hot melt adhesive type |
Hot melt adhesive for plywood |
Type of bonding material |
Metal |
model |
Loctite 680 |
Letai Kunming/Zhengzhou Letai 680 glue nationwide supply anaerobic adhesive 50ml
Letai Kunming/Zhengzhou Letai 680 glue nationwide supplies 50 ml anaerobic adhesive
：1-8-0-2-8-2-6-9-8-1-9
Compared with other adhesives, epoxy adhesive has the following advantages:
(1) Epoxy resin contains a variety of polar groups and highly reactive epoxy groups, so it has strong adhesion with metal, glass, cement, wood, plastic and other polar materials, especially materials with high surface activity. At the same time, the cohesive strength of epoxy cured products is also very high, so its adhesive strength is very high. (2) When the epoxy resin is cured, there is basically no low molecular volatile matter. The volume shrinkage of adhesive layer is small, about 1-2%, which is one of the varieties with small curing shrinkage in thermosetting resins. After adding filler, it can be reduced to below 0.2%. The linear expansion coefficient of epoxy cured products is also very small. Therefore, the internal stress is small and has little impact on the bonding strength. In addition, the creep of epoxy curing material is small, so the dimensional stability of adhesive layer is good. (3) There are many kinds of epoxy resin, curing agent and modifier. The adhesive can have the required process through reasonable and ingenious formula design
Properties (such as rapid curing, room temperature curing, low temperature curing, water curing, low viscosity, high viscosity, etc.), and the required performance (such as high temperature resistance, low temperature resistance, high strength, high flexibility, aging resistance, conductivity, magnetic conductivity, heat conduction, etc.). (4) It has good compatibility and reactivity with a variety of organic compounds (monomer, resin, rubber) and inorganic compounds (such as fillers), and is easy to be modified by copolymerization, cross-linking, blending, filling, etc. to improve the performance of the rubber layer. (5) Good corrosion resistance and dielectric property. It can resist the corrosion of acid, alkali, salt, solvent and other media. The volume resistivity is 1013-1016 Ω· cm, and the dielectric strength is 16-35kV ／ mm. (6) Universal epoxy resin, curing agent and additives have many origins, large output, simple preparation, contact press molding, and large-scale application.
Loctite 680 part fixing glue, model: 680, packaging specification: 50ml/250ml, color: green, large filling gap: 0.381mm
, viscosity: 750-1750 mpa. s, shear strength: 2800 psi, curing speed: 10 min-24 h; Loctite 680 glue, high strength application
Fit with clearance or interference. Repair holes, shaft fittings and out of tolerance parts; Initial curing within 10 minutes. For steel, after 24 hours, provide more than
2.7N/mm2 shear strength, large radial filling gap of 0.25mm, used for bonding cylindrical mating parts.
Where's the toilet paper? The large roll of toilet paper used up in the public toilet of the mall in less than an hour
On March 3, a citizen was drawing free toilet paper from the Temple of Heaven Park. Photographed by Peng Ziyang, a reporter of Beijing News
Recently, a group of photos of excessive use of free toilet paper in the toilets of the Temple of Heaven Park caused heated discussion. Yesterday, the Temple of Heaven Park held a press conference to report that the park mainly discourages excessive paper use. In fact, the amount of paper used has declined in the past two years. In the future, the park will continue to provide free toilet paper.
Although the topic of waste of toilet paper has been hotly discussed recently, as for the use of toilet paper, the reporter visited several public toilets in Beijing yesterday and found that some public toilet managers launched saving measures, but the phenomenon of excessive use of paper is not common.
"We all know what they look like"
Yesterday morning, in the public toilet at the north gate of the Temple of Heaven, an old man wrapped paper in his hands for five or six circles, put it in his bag and left the public toilet. This kind of "retaliation" to cleaners has become a common practice.
The public toilets in the park with few people use more than 10 rolls of paper a day, but at the north and east gates, there are more than 20 rolls of paper a day. The cleaner said, "There are many people here at the North Gate, and there are also many people 'picking up paper'. Basically, the paper has to be renewed every 20 minutes."
In the words of cleaners, these people who use too much paper are called "paper takers". "They are basically older, and we all know what they look like."
The cleaner recalled, "There was an old man in his 60s who took a bag with him every day. He went to any bathroom every day, more than 8:00 in the morning and more than 2:00 in the afternoon. He rolled paper in his bag every day. Last night, there were two old ladies who took out the paper one by one and dragged the whole roll of new paper away at one time."
Toilet paper has been provided for 10 years
Yesterday, the management office of the Temple of Heaven Park held a press conference on the waste of toilet paper, which was discussed by the public recently. It has been 10 years since 2007 when the park launched free toilet paper services to welcome the Olympic Games.
Dong Yali, Deputy Secretary of the Party Committee of the Temple of Heaven Park, said that at the beginning of the implementation, there was a problem of "excessive" use of toilet paper, but the park has always insisted on the supply of toilet paper. "Employees will persuade, but some others will still go their own way, and sometimes they will attract scorn or abuse."
"Because it's free, many people take away a large stack of toilet paper after going to the toilet, and even come here for paper, once a day or even several times, to fill a cloth bag with toilet paper and take it home for private use."
According to reports, the visitors to the Temple of Heaven Park can be divided into two categories: one is pure tourists, about 7 million every year, and the other is local residents, who mainly do morning exercises and evening tours, up to 10 million people every year. "The latter is the majority of people who use too much paper."
Although the excessive use of paper is concerned, Dong Yali said that the total number of visitors to the Temple of Heaven Park has been rising in recent years, but the amount of toilet paper has declined year by year. Data shows that the number of toilet paper has declined by 8% and 14% respectively in the past two years. "It should be said that the quality of most tourists is good," said the person in charge of the Temple of Heaven Park.
The Temple of Heaven Management Office said that according to relevant regulations, Beijing municipal parks, including the Temple of Heaven, should provide free toilet paper.
It is considered to assign special personnel to take care of toilet paper
Yesterday, in the public toilet at the north gate of the Temple of Heaven Park, a new poster of "saving paper" was posted above the toilet paper box, and several volunteers handed out leaflets of saving paper to tourists on the spot.
Han Jie, head of the Garden Appearance and Greening Section of the Temple of Heaven Park, said: "At present, there are no mandatory laws and regulations on the excessive use of toilet paper, and we can only rely on dissuasion."
"There are 14 toilets in the park, each with a male and a female cleaner, who are mainly responsible for cleaning. The cost of having someone look after them may be higher than the cost of toilet paper, but it is also in our consideration," said Han Jie.
Some citizens suggested that the "electric paper extractor" used in public toilets in Taoranting Park could be used as a reference. Everyone could only take a fixed amount of paper at a time by pressing the button. Han Jie said: "For public service products, the technical protection is not good, but depends on the improvement of quality".
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