31results about How to "Help eliminate" patented technology

The invention provides a low-temperature heat-seal acrylic emulsion and a preparation method of the low-temperature heat-seal acrylic emulsion. The preparation method comprises the steps of adopting seeded emulsion polymerization and adding a defined amount of microcrystalline wax before a vacuum degassing and absorbing after-treatment. The parts of the components by weight are 100 parts, including 25 parts of monomer mixture which comprises 75-90 percent of crylic acid -2- ethyl acid ester, 5-20 percent of acrylonitrile and 5-10 percent of methacrylic acid, an initiating agent which comprises organic peroxides, methanal and sodium hydrogen sulfate, a mixed emulsifying agent which comprises a non-ionic surface active agent and secondary chain alkyl sodium sulfonate, a seeded emulsifying agent which comprises secondary chain alkyl sodium sulfonate and MA-80, an auxiliary agent which comprises ammonium acetate and ferrous chloride, and a potential of hydrogen (PH) conditioning agent. The heat-seal temperature of the low-temperature heat-seal acrylic emulsion is 40-48 DEG C. The low-temperature heat-seal acrylic emulsion is good in stability, good in particle evenness, and good in heat-seal evenness. The preparation method of the low-temperature heat-seal acrylic emulsion is used for high-speed packaging of food such as candies and chocolates with the requirement of low temperature and heat seal.

The invention discloses a welding waveform control method for gas metal arc welding of a nickel-based alloy. The method comprises the following steps: a basic value stage: setting a basic valve voltage, a basic valve current and a duration t1; an earlier stage of a pulse stage: setting a first voltage, a first current and a duration t2; a later stage of the pulse stage: setting a second voltage, asecond current and a duration t3; finish of the pulse stage: setting a basic value voltage, a basic value current and a duration t4; a short-circuit current inhibiting stage: setting a third voltage,a third current and a duration 5; and an arcing stage: setting an arcing voltage, an arcing current and a duration t6. The method can solve the problem that it is difficult for P-GMAW globular transfer and it is difficult to pave a molten bath and also can overcome the defect that the side wall is not fused and the root is not penetrated incompletely. The method is favorable for all-position welding and is automatically, and is relatively high in deposition efficiency.