33results about How to "Reduce volume shrinkage" patented technology

The invention provides a preparation method of a cationic ultraviolet light and heat dual deep curing adhesive and relates to a preparation method of a curing adhesive. The method aims at solving the problems that an existing ultraviolet light curing adhesive cannot be rapidly cured deeply, and after ultraviolet light irradiation is used, following heating is still needed. The cationic ultraviolet light and heat dual deep curing adhesive is prepared from, by weight, 60-100 parts of oligomeric resin mixture, 5-30 parts of diluent, 5-15 parts of coupler, 0.75-3 parts of photoinitiator, 075-3 parts of photosensitizer, 0.075-0.5 part of thermal initiator and 0-0.2 part of heat stabilizer. The method includes the steps of 1, weighing; 2, mixing. The cationic ultraviolet light and heat dual deep curing adhesive is obtained. The cationic ultraviolet light and heat dual deep curing adhesive and the preparation method thereof can be obtained.

An organic-inorganic composite filler contains: inorganic aggregate particles formed by aggregation of inorganic primary particles with an average particle diameter of 10 to 1000 nm; an organic resin phase including a cured polymer of a polymerizable monomer covering surfaces of the inorganic primary particles and bonding the inorganic primary particles to each other, and a water absorbing resin; and aggregation gaps with a volume of micropores formed between parts of the organic resin phase of 0.01 to 0.30 cm3 / g in pore volume measurement within a pore diameter range of 1 to 500 nm, as measured by a mercury intrusion technique. In a cross section passing through the centers of the inorganic aggregate particles, based on 100 measured inorganic particles, there are 10 or less inorganic aggregate particles having a macro void with a maximum width of at least 1 μm.

The production method for an optical fiber connector includes the steps of: injecting and hardening a first resin (26) into a resin-injection portion (29) of a connector body (22), the first resin (26) being a light hardening resin or a heat hardening resin; forming a pre-lens by further injecting a second resin (27) on the hardened first resin (26), the second resin (27) being the light hardening resin or the heat hardening resin; and forming a lens by hardening the second resin (27). In this way, it is possible to provide a production method for an optical lens by which influences by volume shrinkage of a resin are decreased, a lens surface can be formed with high accuracy and the product can be made with high quality.

The invention discloses a volume control device for improving the processability of microwave expansion tobacco stems, aiming at providing the volume control device for improving the processability of the microwave expansion tobacco stems, which is simple in structure. The device comprises a barrel, a bracket, a rotating shaft, a helical blade, a steam jacket, a drain valve, a heat preservation layer, a compressed air pipeline and a plurality of compressed air nozzles, wherein a feeding opening is formed in one end of the barrel, a discharging opening is formed in the other end of the barrel, the bracket is used for supporting the barrel, the rotating shaft is rotatably arranged in the barrel, the helical blade is fixedly arranged on the rotating shaft, the steam jacket sleeves the outer wall of the barrel, the drain valve is arranged on the steam jacket, the heat preservation layer is arranged on the outer wall of the steam jacket, the compressed air pipeline penetrates into the barrel, and the plurality of compressed air nozzles are located in the barrel and communicate with the compressed air pipeline; a feeding cross valve is arranged on the feeding opening of the barrel, a discharging cross valve is arranged on the discharging opening of the barrel, and a pressure gauge and a humidity eliminating hole are arranged on the barrel. With the volume control device, the volume shrinkage degree of the microwave expansion tobacco stems after moisture regaining treatment can be greatly reduced, and thus the subsequent slicing processing is facilitated.