40results about How to "Eliminate flow marks" patented technology

The invention discloses a spraying-free nylon resin composition with special aesthetic effect and a preparation method and application thereof. The composition comprises the following components: 70-98 wt% of nylon resin, 1-25 wt% of polymer coated powder microspheres with special effect, 0-10 wt% of a compatibilizer, 0.1-1 wt% of an antioxidant and 0.1-0.5 wt% of a processing aid. The powder with special effect coats with an aqueous polymer dispersion liquid to form microspheres which are then dispersed into nylon resin, so as to significantly improve the compatibility of the powder with special effect and nylon resin, and eliminate the flow mark formed on the surface of products in the extrusion or injection molding process and reduce the weld line. The prepared spraying-free nylon resin composition has aesthetic effects of obvious metal texture and pearly flashing, and greatly improves the scope of market application of spraying-free materials.

The invention discloses a spraying-free polyolefin composition with special aesthetic effect and a preparation method and application thereof. The composition comprises the following components: 70-98 wt% of polyolefin, 1-25wt% of polymer coated powder microspheres with special effect, 0-10 wt% of a compatibilizer, 0.1-1 wt% of an antioxidant and 0.1-0.5wt% of a processing aid. The powder with special effect coats with an aqueous polymer dispersion liquid to form microspheres which are then dispersed into polyolefin, so as to significantly improve the compatibility of the powder with special effect and polyolefin, and eliminate the flow mark formed on the surface of products in the extrusion or injection molding process and reduce the weld line. The prepared spraying-free polyolefin composition has aesthetic effects of obvious metal texture and pearly flashing, and greatly improves the scope of market application of spraying-free materials.

The invention discloses a spray-free PC composition with special aesthetic effects and its preparation method and application, comprising the following components: PC 70-98wt%; polymer-coated special effect powder microspheres 1-25wt%; compatible Antioxidant 0-10wt%; Antioxidant 0.1-1wt%; Processing aid 0.1-0.5wt%; The present invention can be obviously Improve the compatibility of special effect powder and PC, eliminate the flow mark formed on the surface of the product during extrusion or injection molding, and reduce the weld line. The aesthetic effect greatly improves the market application range of spray-free materials.

The invention discloses a polyurethane foaming machine, which comprises a casing, a silo and a driving shaft. A silo is arranged above the casing, and the number of silos is multiple groups. The bottom of the silo is connected with a feed pipe. , the bottom of the feed pipe is communicated with a first pressure pump. According to the density of different raw materials, the present invention can place high-density raw materials in high-position bins through the connection of multiple sets of silos and shells. When raw materials are mixed in an inclined shell, gravity factors can be avoided to cause higher densities. Large raw materials are concentrated under the inner cavity of the shell to prevent uneven mixing of raw materials. At the same time, the inclined shell makes it neither the same nor tangent to the incoming direction of raw materials, which increases the degree of confusion when raw materials enter the shell. The gap between the driving shaft and the driven shaft is large, and the blades have grooves, which increases the throughput of raw materials, improves the distribution and mixing effect of raw materials in the shell, and is beneficial to the mixing of raw materials in the foaming machine. It is suitable for a wide range of promotion and use.

The invention discloses a steam type highlight and traceless injection-molding and forming process for a complex precise product. The process sequentially comprises the following steps of: selecting raw materials, baking, pre-heating, combining a die, then quickly heating, adjusting speed and pressure, injecting in sections, maintaining the pressure, cooling quickly, blowing out cold air, opening the die and cleaning the die. An advanced pressure-regulation and speed-regulation staging injection process and an automatic blowing and impurity-removing technology are adopted in the invention. A special heating and cooling technology is that the shapes, the widths and the arrangement density of water passages are designed according to nonuniform heat and cold of the complex precise product in the injection-molding and forming course and the overall shape variation of the product. The steam type highlight and traceless injection-molding and forming process for the complex precise product has the advantages that the residual stress of the product is effectively decreased, various defects generated in the course of producing the plastic product are greatly reduced, the surface quality and the precision of the product are remarkably improved, and the life of the product is remarkably prolonged at the same time because the special process ensures heating and cooling rates of each part of the complex product in the injection-molding and forming course tend to be consistent.

The invention discloses a sharp cooling and sharp heating highlight forming die, belonging to the technical field of injection moulding. The invention comprises a cavity insert and is characterized in that the inside of the cavity insert is provided with a plurality of cooling water channels transversely and a steam line; the steam line contains a main gas inlet pipe, shunts and a main gas outletpipe; the main gas inlet pipe extends in the upper right of the cavity insert and extends to the middle part of the cavity insert; four shunts are connected on the main gas inlet pipe side by side and extend downwards; the tail parts of the four shunts are connected with the main gas outlet pipe; and the main gas outlet pipe is arranged transversely and extends out of the lower left of the cavityinsert. The invention solves the problem of the prior art that the injection moulding equipment can not realize the fast heating and fast cooling of the mould, thus the product has the appearance quality defects such as weld marks and flow marks, and provides the sharp cooling and sharp heating highlight forming die which has simple structure and can realize fast heating and fast cooling and achieve better injection moulding effect.

The invention discloses a spray-free ABS composition with special aesthetic effects and its preparation method and application, comprising the following components: ABS resin 70-98wt%; polymer-coated special effect powder microspheres 1-25wt%; Compatibilizer 0-10wt%; Antioxidant 0.1-1wt%; Processing aid 0.1-0.5wt%; The present invention disperses the special effect powder into microspheres with water-based polymer dispersion and then disperses them into ABS resin Among them, it can significantly improve the compatibility of special effect powder and ABS resin, eliminate the flow mark formed on the surface of the product during extrusion or injection molding, and reduce the weld line. The prepared spray-free ABS composition has a more obvious metallic texture Special aesthetic effects such as , pearlescent flashing, etc., have greatly improved the market application range of spray-free materials.

The invention discloses a PVC compound which produces 0.03mm to 1.5mm hard piece and semi-hard piece sheets through a rolling method. The compound is characterized in that good toughness effect is achieved through the combination of PVC with different polymerization degree without impact modifier, and largely saves cost; the elasticity and physical property of the obtained PVCD compound are equalto that got by using the impact modifier, the granulation and flow mark are basically removed, and the light transmittance is better; therefore, the compound is applicable to relevant industries, such as shrinked plastics, blow molding, printing, gluing, etc.

The invention relates to a surfactant used for workpieces, a preparation method thereof, and a workpiece surface spraying type pre-treatment method. The surfactant comprises deionized water, an interface complexing agent, a composite low-foam surfactant, an antistatic agent, a water film spreading agent, and an adhesion promoter at a mass ratio of 60-80:0-10:5-15:1-15:1-10:0.5-5. The antistatic agent is one or a composition of a plurality of ingredients selected from ethoxylated amines, ionic quaternary ammonium salts, tertiary amines, and carboxylates; the water film spreading agent is one ora composition of a plurality of ingredients selected from condensation products of alcohol ethers with ethylene oxide, fluorine containing surfactants, and carbon hydrogen surfactants. The surfactantcan be used for spraying at normal temperature, is capable of eliminating water stains and flow stains on the surfaces of workpieces, increasing the adhesion force of workpieces with paint. The preparation method and the workpiece surface spraying type pre-treatment method are simple in operation, and are suitable for large batch production.