8 results about "Molding grade" patented technology

The invention relates to a yellowing test method of injection molding grade PVDF (Polyvinylidene Fluoride). The yellowing test method comprises the following steps: S1, preparing a PVDF sample strip from a PVDF material to be tested through an injection molding process; s2, the PVDF sample strip is placed in an aging test box to be subjected to aging treatment, the yellowing indexes YI0 and YI1 of the PVDF sample strip before and after aging are measured through a spectrocolorimeter, the yellowing index difference value YI = YI1-YI0 is obtained, and the injection molding grade PVDF yellowing degree is tested and evaluated. Compared with the prior art, the method has the advantages that the yellowing degree of the PVDF injection molded part can be accurately and objectively evaluated, and the testing efficiency and accuracy are improved, so that the yellowing performance of the PVDF material is better evaluated.

The application discloses a kind of high-temperature-resistant injection molding grade ultra-high molecular weight polyethylene composite material and modification method, it is related to composite material technical field, first with specific proportion fluorine-containing silane coupling agent, thermal initiator, crosslinking catalyst is mixed to ultra-high molecular weight polyethylene, then again with low molecular weight polyolefin flow modifier is compounded, the modification of high-temperature-resistant injection molding grade ultra-high molecular weight polyethylene composite material is realized.This method has the characteristics of simple process, low cost, mild reaction condition and wide application field, and has good development prospect.

The invention discloses a self-repairing PVC-U injection molding grade modified material and a control method, the self-repairing PVC-U injection molding grade modified material comprises a base material and a self-repairing microcapsule, the base material comprises the following components by mass: 80 parts of PVC resin; 20 parts of PVC with an ultralow polymerization degree; 5 parts of a calcium-zinc stabilizer; 1 part of a lubricant; 2 parts of ACR resin; 10 to 15 parts of nano calcium carbonate; the content of the self-repairing microcapsule is 5 to 10 weight percent. According to the invention, the material with the self-repairing effect can be obtained, so that the subsequently produced product has a certain self-repairing effect.

The invention relates to an injection molding grade nylon 6 slice and a preparation method and application thereof, and relates to the technical field of new materials. According to the injection molding grade nylon 6 slice, monobasic acid is added as a molecular weight stabilizer in the caprolactam hydrolysis ring-opening polymerization process, the finally prepared slice has better viscosity stability, and the flowing property of a nylon melt is improved.

The invention relates to the technical field of wood-plastic composite materials, and particularly discloses an injection molding grade high-corrosion-resistance wood-plastic composite material and a preparation method thereof.The injection molding grade high-corrosion-resistance wood-plastic composite material is prepared from, by weight, 43-75 parts of waste plastic, 10-25 parts of wood flour, 12-18 parts of pitaya peel particles, 3-7 parts of talcum powder and 4-6 parts of light calcium carbonate powder. 5-9 parts of chitosan, 2-8 parts of a coupling agent, 3-5 parts of an adhesive and 1-2 parts of an antioxidant. The injection molding grade wood-plastic composite material with high corrosion resistance, which has the characteristics of excellent injection molding property, high rigidity, high corrosion resistance, mechanical property and the like, is developed by modifying two mixed fillers, namely the pitaya peel particles and the wood flour, with a specific chitosan surface accelerant and mixing with a waste plastic matrix.

The invention discloses a scratch-resistant blow molding grade TPO (thermoplastic polyolefin) elastomer with smooth hand feeling and a preparation method of the scratch-resistant blow molding grade TPO elastomer. The TPO elastomer is prepared from the following components in parts by weight: 40 to 60 parts of polypropylene, 20 to 35 parts of ethylene propylene rubber, 5 to 15 parts of thermoplastic polyurethane, 2 to 5 parts of nano aluminum oxide, 1 to 3 parts of silicone master batch, 0.1 to 0.3 part of dynamic vulcanizing agent, 2 to 4 parts of compatilizer, 0.2 to 0.5 part of antioxidant and 0.1 to 0.3 part of light stabilizer. The preparation method comprises the following steps: carrying out surface modification on the nano aluminum oxide, pre-mixing the components, and carrying out dynamic vulcanization blending and granulation at a specific temperature and a specific rotating speed by using a double-screw extruder. Through multi-component cooperation and a dynamic vulcanization process, the material has excellent surface smooth hand feeling (the static friction coefficient is less than or equal to 0.4) and scratch resistance (the pencil hardness is greater than or equal to 3H) while keeping high toughness and high elasticity, and is particularly suitable for blow molding products with high requirements on touch feeling and surface durability, such as automotive interiors and household appliance shells.

The invention discloses a micro-pressure manned (oxygen) cabin body formed at a time based on a rotational molding process, and belongs to the technical field of medical care equipment. The cabin body is of a hollow structure integrally formed through a rotational molding process, rotational molding grade composite plastic (polyethylene and the like) is selected as a main body material, and the wall thickness is 3-10 mm and is uniform. And a reinforcing rib structure integrally formed with the main body is arranged inside or outside the cabin body. The cabin body is provided with a cabin door frame with a sealing structure, an air inlet connector, an exhaust connector and an observation window installation hole. The cabin body is integrally formed through the rotational molding process, no splicing seam exists, the structural strength is high, and the air tightness is excellent; the plastic material enables the cabin body to be light in weight and resistant to corrosion; the structural stability is further improved through the reinforcing rib design; production efficiency is high, cost is low, and the inner wall is smooth and convenient to clean. The micro-pressure manned (oxygen) cabin effectively overcomes the defects that an existing micro-pressure manned (oxygen) cabin is low in structural strength, low in air tightness, large in weight, prone to corrosion, high in cost, low in production efficiency and the like, and is applied to the health fields of relieving altitude stress, improving human body microcirculation, relieving fatigue, promoting rehabilitation and the like.

The application discloses an injection molding grade flame-retardant metal polymer composite material and a preparation method and application thereof. The composite material comprises the following components in parts by weight: 28-42 parts of polyolefin resin; 20-30 parts of metal iron powder; 15-25 parts of bromine flame retardant; 5-10 parts of inorganic magnesium compound; and 1-5 parts of interface modifier. The interface modifier is maleic anhydride graft and / or acrylic acid graft. In the application, the polyolefin resin is used as the base resin, the metal iron powder is added, the bromine flame retardant and the inorganic magnesium compound are used in cooperation, the good flame-retardant effect can be achieved, and the good magnetic strength and metal luster are also achieved.