Pinching and squeezing toysPinch and pinch was a kind of stress relief toy. It was soft and elastic. Through squeezing and pinching, one could feel its slow rebound characteristics, which not only increased the fun of the toy, but also reduced stress and anxiety. Squeezing and relaxing could train the muscles of the fingers and improve the flexibility and strength of the fingers. While focusing on the squeezing and recovery process of the toy, it could distract attention from other things and improve concentration. In addition, frequent finger movements could also help promote blood circulation and improve the poor blood circulation in the hands. As a new type of stress relief toy, pinching music had many benefits in relieving stress, exercising muscles, improving concentration, and promoting blood circulation.
The reaction of toothpaste squeezing into waterThe surface of toothpaste usually contains a surfacing agent. When the toothpaste is squeezed into water, the water molecules will form a thin layer on the surface of the toothpaste. This is a phenomenon of surface tension, which will cause the water droplets to form a spherical shape on the surface of the toothpaste instead of spreading out. Due to the effect of the surface active agent in the toothpaste, the force between the water droplets and the surface of the toothpaste would change, and the water droplets would float for a while. Moreover, there were chemical components in the toothpaste that would react with water to produce gas, pushing the small pieces of toothpaste to "swim" on the water surface.
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The applicable scope of the squeezing methodThe squeezing method can be used to adjust the uneven settlement of non-saturated soil and to reinforce the adjacent soil during large-scale excavation or tunnel excavation. It can also be used to reinforce the foundation of existing buildings in the reconstruction of storeys. It can also be used to reinforce the foundation of sand, silt, clay, artificial fill, etc.
The preparation of nylon6 by the method of reaction squeezingThe principle of the preparation of nylon6 by the reaction squeezing method was that in the presence of a catalyst (which promoted the production of the initiator) and a cocatalyst (which promoted the formation of the growth center of the reaction), the initiator could produce nylon6 with a relatively high molecular weight in a few minutes with a conversion rate of 90% - 95%. firstly, the caprylane reacted with the base to generate caprylane anionates, then caprylane reacted with the amine ester to generate caprylane amine ester, then the caprylane anionates attacked caprylane amine ester to generate a ring-opening reaction to generate another active anionates, the caprylane reacted with the active anionates to generate active caprylane amine ester to realize chain extension, then the caprylane ester ester was attacked by caprylane anionates to generate a ring-opening reaction, and the cycle continued. Finally, the desired relative molecular mass of the compound was obtained. Water was generated when the Caprolene reacted with the base to form the Caprolene ions. This water must be removed, otherwise the synthesis reaction would be difficult. The conversion of Caprolene to nylon6 was an exothermic reaction, and the heat of the synthesis was about 125kJ/kg.
The technological process was as follows: after the apped was melted, a certain amount of base was added for dehydration, and then it was put into a twin-screw excavator together with a catalyst for reaction and squeezing. After stretching, water-cooling, air-cooling, slicing, extraction and drying, the finished product was obtained. The main equipment of the pre-experiment treatment system included a reaction kettle, a buffer tank, a vacuum pump, a main measuring pump, an auxiliary measuring pump, a heat-conducting oil circulating pump, a mixing tank, a high-level tank, etc. The heat of the reaction kettle was supplied by the heat conducting oil of the reaction kettle jacket. It was heated by an electric heating rod with a heating power of 8 Kilowatt, and the temperature was controlled by two thermocouples. The temperature control range was 150 - 180 ° C, with an error of about 2 ° C. The temperature in the reaction kettle was maintained at 140 ° C. In addition, the temperature of the vacuum pipeline and the material pipeline was also controlled. The electric heating belt was used to maintain the temperature at 150 ° C. There were 6 temperature measuring points distributed in the reaction kettle, the reaction kettle jacket, the vacuum tube, the material tube and other parts to monitor the whole process. This control system could be used for both on-site control and remote control.
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Stayed hooked to this story. Paid more than I shi lol ild have to keep buying access to it over the last month or too, lol! Wish the chapters were longer and less qty chapters as it felt like squeezing money from readers. Still.. worth the read.