10results about How to "Reduce processing temperature" patented technology

The invention discloses an optimization process for preparing hydrolysis-resistant PET (polyethylene terephthalate) master batch. The optimization process comprises the following steps: S1, pretreating raw materials; s2, low-temperature pre-dispersion: adding the dried raw materials weighed according to the formula proportion into a high-speed mixer, so that the anti-hydrolysis agent and the auxiliary agent are uniformly attached to the surface of the PET base material to form a premix; s3, mild extrusion granulation: melting and mixing the premix through a twin-screw extruder, and extruding the premix into filaments through a die head; s4, the filaments are rapidly cooled and shaped through a cooling water tank, and secondary cross-linking is avoided; s5, pelletizing by adopting a pelletizer to obtain primary master batches; s6, the primary master batch is subjected to vacuum drying, surface moisture is removed, and the anti-hydrolysis PET master batch is obtained.The thermal degradation of a PET base material and the advanced reaction of an anti-hydrolysis agent are reduced, the intrinsic viscosity of the master batch is stable, and the anti-hydrolysis efficiency is improved.

This invention relates to the field of shape memory material preparation technology, specifically to a bio-based shape memory Eucommia ulmoides gum composite material and its preparation method. All components of the composite material are of entirely bio-based origin, using natural Eucommia ulmoides gum as the matrix. Nano-hybrid seed crystals composed of cellulose nanocrystals and carbon quantum dots are introduced. The cellulose nanocrystals act as nucleating agents, guiding and accelerating the cooling crystallization of the Eucommia ulmoides gum, while the carbon quantum dots form the shell, improving heat transfer efficiency. In the preparation process, this application uses triacylglycerol lipase as a biocatalyst, which can initiate an in-situ esterification reaction between the filler and the matrix at a low temperature of 65-75℃. This not only reduces energy consumption but also avoids the thermal degradation and damage to the Eucommia ulmoides gum macromolecular chains caused by high-temperature strong shear, achieving high performance and batch-to-batch stability of the material.

The application belongs to the field of engineering plastics, and particularly relates to long-chain polyamide resin with easy processing and high tensile property, and a preparation method and application thereof. The long-chain polyamide resin comprises the following raw material components: component a: aliphatic carboxylic acid compound component; component b: polyamine compound component; and component c: a compound with a structure shown in the following formula (1), wherein n and m can be any number between 1 and 10. The long-chain polyamide resin of the application introduces structural diacid with an asymmetric benzene ring structure, utilizes the asymmetric structure to reduce the crystallinity of the material, and introduces the benzene ring structure to improve the mechanical property of the polyamide material, so that the low processing temperature is realized from the polyamide material component itself, the energy consumption is reduced, and the mechanical property of the polyamide material is ensured. The problem that the processing temperature and mechanical property of the polyamide material and the processing energy consumption are difficult to be considered in the prior art is solved.

The application provides a pultrusion process, product and application of a thermoplastic resin composite material, the pultrusion process comprising the following steps: preheating a prepreg tape and then feeding the prepreg tape into a pultrusion forming die for pultrusion forming, wherein the pultrusion forming die comprises a heating die and a cooling die, the heating die comprises a first heating zone and a second heating zone, the temperature of the second heating zone is less than the temperature of the first heating zone, the temperature at which the thermoplastic resin is decomposed by 10 wt% in an air atmosphere is denoted as T a ℃, the temperature of the first heating zone is denoted as T1℃, 95≤T a -T1≤150. The product obtained by the pultrusion forming process of the application has a good appearance, and the mechanical properties of the product are good. Different structural parts can be produced, and the application has the advantages of low processing temperature, low energy consumption, fast manufacturing speed, simple processing technology and continuous production. The continuous fiber reinforced thermoplastic resin prepreg tape is used as a base material to endow the product with recyclable processing performance.

The invention relates to a processing method of a single crystal quartz material. And determining a to-be-processed area in which the single crystal quartz material is easy to generate bicrystal. The to-be-processed area on the single crystal quartz material is modified by using the modifier, so that the processing difficulty of the to-be-processed area is reduced. And processing the single crystal quartz material in the modified to-be-processed area by using a processor.

This invention belongs to the field of high-performance fiber composite materials technology, specifically relating to a method for preparing low-dielectric ramie fiber reinforced polycarbonate composite materials. First, ramie fibers with acrylate-type double bonds modified on their surface are prepared. Then, poly(styrene-isoprene) modified ramie fibers are prepared by copolymerizing the acrylate-type ramie fibers with styrene and isoprene. Next, polyphenylene ether and the poly(styrene-isoprene) modified ramie fibers are mixed evenly and added to a hopper. A polyphenylene ether / ramie fiber alloy is prepared using a twin-screw extruder. Finally, the polyphenylene ether / ramie fiber alloy is mixed evenly with polycarbonate and added to a hopper. A low-dielectric ramie fiber reinforced polycarbonate composite material is prepared using a twin-screw extruder. The molecular weight of the modified ramie fiber polymer is adjustable, as is the ratio of styrene to isoprene. The polystyrene segments effectively improve the compatibility between ramie fibers and polyphenylene ether, while the polyisoprene segments effectively enhance the toughness of the polyphenylene ether / ramie fiber alloy.

The invention discloses a flexible PET-based copolyester and a preparation method thereof, and relates to the technical field of high polymer materials, and the flexible PET-based copolyester is prepared from dibasic acid and dihydric alcohol through esterification and condensation polymerization; the binary acid comprises aliphatic flexible binary acid and terephthalic acid; the dihydric alcohol comprises ethylene glycol and flexible dihydric alcohol; the flexible dihydric alcohol comprises diethylene glycol and polyethylene glycol; the feeding amount of the diethylene glycol accounts for 1.0%-5.0% of the total molar weight of the dihydric alcohol; the feeding amount of the polyethylene glycol accounts for 3.0%-8.0% of the total molar weight of the dihydric alcohol. The copolyester has the advantages of high flexibility and low melting point.

This invention relates to the field of polyurethane adhesive technology, specifically to a thermoplastic polyurethane resin for bonding water-repellent fabrics, its preparation method, and its application. It is prepared from the following raw materials: polyol, isocyanate, blocked isocyanate, chain extender, bonding accelerator, water-repellent synergist, and catalyst; the bonding accelerator is a compound of γ-aminopropyltriethoxysilane and tetrabutyl titanate; the water-repellent synergist is epoxy-terminated polydimethylsiloxane. This invention, through optimized formulation, solves the technical problems of insufficient bonding strength and poor resistance to damp heat aging of existing polyurethane resins for water-repellent fabrics, while also considering the synergistic effect of resin processing fluidity and water-repellent performance. It is suitable for composite processing of water-repellent fabrics in high-frequency use scenarios and has broad industrial application prospects.

The invention relates to the technical field of high polymer material assistants, in particular to a preparation method and application of an anti-reflection polypropylene nucleation assistant.The anti-reflection polypropylene nucleation assistant.The anti-reflection polypropylene nucleation assistant.The anti-reflection polypropylene nucleation assistant.The anti-reflection polypropylene nucleation assistant.The anti-reflection polypropylene nucleation assistant.The anti-reflection polypropylene nucleation assistant.The anti-reflection polypropylene nucleation assistant.The anti-reflection polypropylene nucleation assistant.The preparation method has the advantages that the anti-reflection polypropylene nucleation assistant.The anti-reflection the surface lipophilicity is improved, the compatibility with a polypropylene matrix and a sorbitol nucleating agent is remarkably improved, and the problem of poor dispersity is solved; the sorbitol nucleating agent provided by the invention and an inorganic nanoparticle compounded system generate a synergistic effect, and compared with a single nucleating agent, the sorbitol nucleating agent provided by the invention can reduce fog of a polypropylene product, improve impact strength and improve flexural modulus; the composite nucleating agent provided by the invention can stably play a role at 180-200 DEG C, compared with a traditional nucleating agent, the processing temperature is reduced, the processing energy consumption is reduced, and the composite nucleating agent has a wide application prospect.

The utility model belongs to the technical field of stamping processing, and particularly relates to an iron chip stamping part with a positioning bulge, which comprises a working table, a servo motor is arranged in an inner cavity of the working table, the top of the servo motor is fixedly connected with an output rod, the top of the output rod penetrates through the top of the working table, and the top of the output rod is fixedly connected with a stamping part; the servo motor drives the stamping part through the output rod, high-precision position adjustment can be achieved, the precision machining requirement of the positioning protrusion is met, stamping size errors are reduced, the cooling pipe is matched with the nozzle to accurately spray cooling liquid to a stamping area, the machining temperature is lowered in time, the situation that the material performance of an iron chip is changed due to high temperature is avoided, and stable work of the cooling pipe is guaranteed through the fixing part. Cooling liquid is stored in the liquid storage tank and continuously supplied to the cooling pipe through the water pump and the hose, cooling continuity is guaranteed, redundant cooling liquid on the top of the workbench is recycled to the liquid storage tank, the cooling liquid utilization rate is increased, and meanwhile the workbench top is kept clean and tidy.