54results about How to "Anti-cracking" patented technology

The invention discloses a mutual assistance type lock system adopting an asymmetric encryption technology and a control method of the mutual assistance type lock system. The mutual assistance type lock system comprises a key generation device, a control panel, a key input device and one or more electromechanical locks, wherein the key generation device generates a locking key and an unlocking key in pairs; the control panel comprises a CPU (central processing unit) controller and an affiliated storage device thereof; the output end of the key input device is connected with the CPU controller; the CPU controller controls the electromechanical locks to be locked or unlocked; the electromechanical locks are arranged on various openable doors. According to the brand-new lock system provided by the invention, a set of lock can be locked and unlocked by one or more groups of different keys in pairs; in a pair of keys, one key is used for locking while the other key is used for unlocking, and a group comprises the two keys which are used in pairs; representation and carrier forms of the keys can be but not limited to cipher texts, bi-dimensional codes, keys, magnetic cards, IC (integrated circuit) cards and the like. By the flexible adoption of an asymmetric encryption algorithm, the mutual assistance type lock system has the characteristics of credibility, cracking prevention, repudiation prevention and the like and is safe and reliable.

The invention discloses an environment-friendly waterproof solid wood balance plate and a preparation method thereof. The environment-friendly waterproof solid wood balance plate comprises a base material made of dipterocarpaceae wood or Falcata wood. A board core is arranged in the base material and is a poplar mixed core. A face skin layer is arranged on the surface of the base material, a waterproof jointed board press paster is arranged on the face skin layer, and melamine veneering paper undergoing wear-resisting technology processing is arranged on the waterproof jointed board press paster. The solid wood balance plate is produced by selecting and using the best ring adhesive, the base material and the process, the release amount of harmful substances such as methanol and formaldehyde is zero, cracking, foaming and delamination and the like are avoided, and the environment-friendly waterproof solid wood balance plate has the advantages of being environment-friendly, waterproof, wear-resisting in surface and resistant to cracking and the like and can be applied to the fields of furniture, cupboards and bathrooms and the like.

The invention discloses ship environment-friendly water-based paint and a preparation method thereof. The ship environment-friendly water-based paint is prepared from the following ingredients in percentage by weight: 5-10% of unsaturated organic silicon, 5-15% of vinyl versatate, 10-25% of butyl acrylate, 10-35% of vinyl acetate, 10-20% of vinyl benzene and 30-50% of inorganic salt powder. The ship environment-friendly water-based paint is compounded to be emulsus paint by adopting a multielement polymerization emulsion mode, and is novel environment-friendly water-based paint being waterproof, rustproof, corrosion-proof, crack-proof and good in aging resistance.

The invention relates to anti-freezing and anti-cracking concrete in the field of building materials. The anti-freezing and anti-cracking concrete comprises following components in percentage by weight, 10-20% of cement, 25-30% of sand, 30-45% of gravel, 10-15% of water, 2.0-5.0% of additives, 1.0-2.0% of water-proof agent and 0.0-1.4% of anti-freezing agent, and is produced by burdening and stirring. Compared with the prior art, the anti-freezing and anti-cracking concrete has the advantages of high strength, good toughness, cracking resistance, leakage resistance, high stability and the like, is capable of effectively solving the problems of cracking, brittleness and water seepage caused by the fact that the concrete is subjected to repeated freezing and thawing due to change of temperature difference, and increasing the indexes such as strength, toughness and stability, and is especially suitable for high and cold areas in north.