CN109291404B - Double-screw combination for extrusion molding processing of nylon and glass fiber and processing method thereof - Google Patents
Double-screw combination for extrusion molding processing of nylon and glass fiber and processing method thereof Download PDFInfo
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- CN109291404B CN109291404B CN201811043284.7A CN201811043284A CN109291404B CN 109291404 B CN109291404 B CN 109291404B CN 201811043284 A CN201811043284 A CN 201811043284A CN 109291404 B CN109291404 B CN 109291404B
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Abstract
The invention provides a double-screw combination for extrusion processing of nylon and glass fiber and a processing method thereof. The invention comprises two intermeshing screws, each screw comprising a plurality of thread elements and a plurality of kneading elements; each screw is divided into a conveying section, a conveying compression section, a plasticizing mixing section, a first dispersing mixing section, a natural exhaust side feeding and glass fiber adding section, a glass fiber distributing and mixing section, a second dispersing mixing section, a vacuum exhaust section and a conveying homogenizing section which are connected in sequence; the screw elements include 22/11, 22/22, 32/32, or 48/48, and the kneading elements include 45/5/22, 45/5/32, or 90/5/32; the invention also provides a method for carrying out nylon extrusion molding processing on the double-screw combination. The double-screw combination has good matching performance, the surface of the extruded material strip is smooth, the interior of the extruded material strip is compact, the strip breaking phenomenon does not occur in the extrusion process, the extrusion pressure of a machine head is normal, the material strip is uniformly granulated, and the product performance is good.
Description
Technical Field
The invention relates to the technical field of nylon extrusion molding processing, in particular to a double-screw combination for nylon and glass fiber extrusion molding processing and a processing method thereof.
Background
Nylon is the most various and widely applied engineering plastics in the world, and the main varieties are as follows: nylon 6(PA6), nylon 66, nylon 610, etc., nylon 6 is used in many fields, but nylon 6 is flammable, so it is necessary to develop flame retardant nylon 6 with high electrical insulation performance. At present, most people of flame retardant modification of nylon 6 adopt a method of adding a halogen flame retardant; however, the potential hazard of the traditional halogen flame retardant to human bodies and the environment is more and more known and understood, and the use of the halogen-free flame retardant is increasingly becoming a development hotspot and an important direction of the current flame retardant materials. The glass fiber reinforced halogen-free flame retardant PA6 is an important halogen-free flame retardant engineering plastic and is mainly used in the fields of electronic appliances, electrical switches and the like.
In the prior art, the extrusion molding processing of the glass fiber reinforced halogen-free flame retardant PA6 is carried out in a common screw extruder, and because the screw combination of the extruder is greatly different from the formula of the glass fiber reinforced halogen-free flame retardant PA6, the screw combination cannot be well matched with the formula of the glass fiber reinforced halogen-free flame retardant PA6, so that the raw material mixing and extrusion molding quality is low, and the performance of the obtained nylon product is seriously influenced.
Disclosure of Invention
The invention provides a double-screw combination for extrusion molding processing of nylon and glass fiber and a processing method thereof, which solve the problem that the quality of products is reduced because the screw combination in the prior art cannot well meet the requirement of extrusion molding processing of nylon and glass fiber.
The invention relates to a double-screw combination for extrusion processing of nylon and glass fiber, which adopts the technical scheme that: comprises two screws which are mutually meshed, and each screw comprises a plurality of thread elements and a plurality of kneading elements; each screw is divided into 9 sections including a conveying section, a conveying compression section, a plasticizing mixing section, a first dispersing mixing section, a natural exhaust side feeding and glass fiber adding section, a glass fiber distributing mixing section, a second dispersing mixing section, a vacuum exhaust section and a conveying homogenizing section which are connected in sequence; the plurality of screw elements comprise a plurality of forward screw elements and a plurality of reverse screw elements, the plurality of kneading elements comprise a plurality of forward kneading elements and a plurality of reverse kneading elements, the screw elements comprise any one or more of 22/11, 22/22, 32/32 or 48/48, and the kneading elements comprise any one or more of 45/5/22, 45/5/32 or 90/5/32.
The meshed co-rotating double-screw extruder is the type with the widest application range in the double-screw extruder, and is widely applied to modification, toughening, strengthening, filling and reactive extrusion of polymers; compared with a single-screw extruder, the meshed co-rotating double-screw extruder has the advantages of good mixing and plasticizing effects, easiness in feeding, short retention time of materials in the screw, good exhaust performance and the like; however, the screw operation parameters such as the feeding method, the feeding amount, the screw configuration, and the like are large. The double-screw combination designed by the invention has good matching performance, free running, powerful extrusion on the raw materials, smooth extrusion of the raw materials in the extrusion process and no influence on the performance of the raw materials; the multi-section sectional control can be realized, compared with other double-screw combination modes, the design has better shearing effect on the glass fiber, so that the glass fiber and the material are better melted, the mixing is more uniform, the surface of the extruded material strip is smooth, the inside of the extruded material strip is dense, the strip breaking phenomenon is avoided in the extrusion process, the extrusion pressure of a machine head is normal, the material strip is uniformly cut into granules, and the product performance is good.
The invention relates to a screw combination designed for flame-retardant reinforced nylon materials, the color of the flame-retardant reinforced nylon materials extruded by the screw combination does not turn yellow, the decomposition of components does not occur, the shearing temperature is low, nylon can not be decomposed and can be smoothly formed by drawing strips, the screw combination has very good effect in producing common reinforced nylon, the obtained nylon materials have high tensile strength, bending strength, elongation, bending modulus and impact property, one set of screw combination can be used for producing a plurality of nylon materials, and the production efficiency is improved.
As a preferred embodiment, the conveying section comprises the following elements in sequence: 32/32a, 48/48, 48/48, 48/48; the conveying compression section sequentially comprises the following elements: 32/32, 32/32, 22/22, 22/22; the plasticizing mixing section comprises the following elements in sequence: 45/5/32, 45/5/32, 32/32, 32/32, 22/22; the first dispersive mixing section comprises the following elements in sequence: 45/5/32, 90/5/32, 45/5/32, 22/11L; the natural exhaust side feeding and glass fiber adding section sequentially comprises the following elements: 48/48, 48/48, 48/48; the glass fiber distribution mixing section sequentially comprises the following elements: 32/32, 22/22, 22/22; the second dispersing and mixing section comprises the following elements in sequence: 45/5/32, 45/5/32, 90/5/32, 48/48, 48/48, 32/32, 32/32, 22/22, 45/5/32, 90/5/32, 45/5/32L, 22/11L; the vacuum exhaust section comprises the following elements in sequence: 48/48, 48/48, 48/48; the conveying homogenizing section sequentially comprises the following elements: 32/32, 32/32, 32/32, 32/32, 22/22, 22/22. 32/32A denotes a forward-direction screw element having a lead of 32mm and a length of 32mm, A in 32/32A denotes that the screw element is the starting element of the screw, 48/48 denotes a forward-direction screw element having a lead of 48mm and a length of 48mm, 22/11L denotes a reverse-direction screw element having a lead of 22mm and a length of 11mm, 45/5/32 denotes a forward-direction kneading element having a stagger angle of 45 DEG and a lead of 32mm composed of 5 kneading blocks, and so on; 45/5/32L shows a reverse kneading element consisting of 5 kneading blocks with a lead of 32mm with a stagger angle of 45, and so on.
As a preferred embodiment, the conveying section comprises the following elements in sequence: 32/32a, 48/48, 48/48; the conveying compression section sequentially comprises the following elements: 32/32, 32/32, 32/32, 22/22, 22/22; the plasticizing mixing section comprises the following elements in sequence: 45/5/32, 45/5/22, 32/32; the first dispersive mixing section comprises the following elements in sequence: 45/5/32, 45/5/32, 45/5/32L, 32/32, 45/5/22, 45/5/22, 45/5/32, 22/11L; the natural exhaust side feeding and glass fiber adding section sequentially comprises the following elements: 48/48, 48/48, 32/32, 32/32; the glass fiber distribution mixing section sequentially comprises the following elements: 48/48, 48/48, 32/32, 32/32; the second dispersing and mixing section comprises the following elements in sequence: 48/48, 48/48, 32/32, 22/22, 45/5/32, 45/5/22, 22/22, 45/5/32, 90/5/32, 45/5/32L, 22/22, 45/5/22, 45/5/22, 22/11L; the vacuum exhaust section comprises the following elements in sequence: 48/48, 48/48, 32/32; the conveying homogenizing section sequentially comprises the following elements: 32/32, 32/32, 32/32, 22/22, 22/22, 22/22. The designed double-screw combination has good shearing performance and high shearing efficiency, the length of the glass fiber is reasonably controlled, and the performance of the obtained product is better.
As a preferred embodiment, the conveying section comprises the following elements in sequence: 32/32a, 48/48, 48/48, 48/48; the conveying compression section sequentially comprises the following elements: 32/32, 32/32, 22/22, 22/22; the plasticizing mixing section comprises the following elements in sequence: 45/5/32, 45/5/32, 32/32, 32/32, 22/22; the first dispersive mixing section comprises the following elements in sequence: 45/5/32, 90/5/32, 45/5/32, 22/11L; the natural exhaust side feeding and glass fiber adding section sequentially comprises the following elements: 48/48, 48/48, 32/32, 32/32; the glass fiber distribution mixing section sequentially comprises the following elements: 22/22, 22/22; the second dispersing and mixing section comprises the following elements in sequence: 45/5/32, 45/5/32, 45/5/22, 48/48, 48/48, 32/32, 32/32, 45/5/32, 90/5/32, 45/5/32L, 32/32, 22/11L; the vacuum exhaust section comprises the following elements in sequence: 48/48, 48/48, 48/48; the conveying homogenizing section sequentially comprises the following elements: 32/32, 32/32, 22/22, 22/22, 22/22, 22/22, 22/22. The screw combination of the invention can be properly adjusted, thereby achieving the effect of the invention.
As a preferred embodiment, the conveying section comprises the following elements in sequence: 32/32a, 48/48, 48/48, 32/32; the conveying compression section sequentially comprises the following elements: 32/32, 22/22, 22/22, 22/22; the plasticizing mixing section comprises the following elements in sequence: 45/5/32, 45/5/32, 32/32, 90/5/32, 45/5/22, 45/5/22, 45/5/32L, 22/22; the first dispersive mixing section comprises the following elements in sequence: 90/5/32, 45/5/32, 22/11L; the natural exhaust side feeding and glass fiber adding section sequentially comprises the following elements: 48/48, 48/48, 48/48, 32/32, 32/32; the glass fiber distribution mixing section sequentially comprises the following elements: 48/48, 48/48, 32/32, 32/32; the second dispersing and mixing section comprises the following elements in sequence: 48/48, 32/32, 45/5/22, 45/5/22L, 22/22, 22/22, 45/5/22, 90/5/32, 32/32, 45/5/22, 45/5/22, 22/11L; the vacuum exhaust section comprises the following elements in sequence: 48/48, 48/48; the conveying homogenizing section sequentially comprises the following elements: 32/32, 32/32, 32/32, 32/32, 22/22, 22/22, 22/22.
As a preferred embodiment, the conveying section comprises the following elements in sequence: 32/32a, 48/48, 48/48, 48/48; the conveying compression section sequentially comprises the following elements: 32/32, 32/32, 22/22, 22/22; the plasticizing mixing section comprises the following elements in sequence: 45/5/32, 45/5/32, 32/32, 22/22, 22/22; the first dispersive mixing section comprises the following elements in sequence: 45/5/32, 90/5/32, 45/5/32, 22/11L; the natural exhaust side feeding and glass fiber adding section sequentially comprises the following elements: 48/48, 48/48, 32/32; the glass fiber distribution mixing section sequentially comprises the following elements: 32/32, 22/22, 22/22; the second dispersing and mixing section comprises the following elements in sequence: 45/5/32, 45/5/32, 45/5/32, 48/48, 48/48, 32/32, 32/32, 45/5/32, 90/5/32, 45/5/32L, 32/32, 22/11L; the vacuum exhaust section comprises the following elements in sequence: 48/48, 48/48, 48/48; the conveying homogenizing section sequentially comprises the following elements: 32/32, 32/32, 22/22, 22/22, 22/22, 22/22, 22/22.
The double-screw combination of the invention is composed of functional sections of conveying, conveying compression, plasticizing mixing, exhausting and the like, wherein the conveying section generally adopts a large lead and a forward screw conveying element and the like, the conveying compression section generally changes the lead in a sectional manner or changes the lead gradually, the plasticizing mixing section generally adopts meshing blocks with different shearing actions, and a glass fiber feed opening generally adopts a large lead, so that a polymer melt is in a half-full state when reaching the position to reserve glass fibers added in a space; the exhaust section comprises a natural exhaust side feeding glass fiber adding section and a vacuum exhaust section, wherein the exhaust section is provided with an exhaust hole, raw materials can overflow from the exhaust hole if a shear block and a reverse screw block are added in the exhaust section, the exhaust hole of the natural exhaust side feeding glass fiber adding section is a position for adding glass fibers, the glass fibers cannot be added if other screw elements are adopted, the exhaust hole of the vacuum exhaust section is connected with a vacuum device to extract small molecular substances in the materials, and the overflow of the materials can cause vacuum blockage, so that the drawn materials are hollow in the middle.
In a preferred embodiment, each of the screws has a length of 1440mm and a diameter of 35 mm. The length and the diameter of the screw are controlled, so that the matching performance of the screw is better, and the screw can be extruded smoothly; the use efficiency and the production efficiency of the screw combination are improved, and the production cost is greatly reduced.
The invention relates to a method for extrusion processing of nylon and glass fiber, which adopts the technical scheme that the method comprises the following steps: the method comprises the following steps: 1) weighing the following raw materials in parts by weight: 50-75 parts of PA6 resin, 20-35 parts of glass fiber, 2-4 parts of antimony trioxide, 8-12 parts of brominated styrene, 0.1-0.8 part of antioxidant and 0.1-0.8 part of lubricant; 2) mixing the PA6 resin, antimony trioxide, brominated styrene, an antioxidant and a lubricant in the raw materials weighed in the step 1); 3) adding the uniformly mixed material obtained in the step 2) into the double-screw combination for nylon and glass fiber extrusion processing according to any one of claims 1-6, extruding, adding glass fiber into a side feeding port, and co-extruding; the temperature of the conveying section is 210-220 ℃, the temperature of the conveying compression section is 260 ℃, the temperature of the plasticizing mixing section is 265 ℃, the temperature of the first dispersing mixing section is 275 ℃, the temperature of the natural exhaust side feeding and glass fiber section is 275 ℃, the temperature of the glass fiber distribution mixing section is 275 ℃, the temperature of the second dispersing mixing section is 275 ℃, the temperature of the vacuum exhaust section is 265 ℃ and the temperature of the conveying homogenizing section is 280 ℃; 4) and 3) cooling and granulating the extruded material strips obtained in the step 3) to obtain the product.
According to the extrusion processing method of the nylon and the glass fiber, various performances of PA6 and glass fiber extrusion processing materials can be improved without changing a raw material formula or a processing technology and the like through the design of the double-screw combination, the shearing efficiency of the glass fiber can be improved, the fiber length can be reasonably controlled, the extrusion effect is improved, the surface of an extruded material strip is smooth, the inside of the extruded material strip is compact, the strip breaking phenomenon does not occur in the extrusion process, the extrusion pressure of a machine head is normal, the material strip is uniformly cut into granules, the use efficiency and the production efficiency of the screw combination are improved, and the production cost is greatly reduced.
In a preferred embodiment, in the step 4), the cooling is performed to room temperature. The extruded material strips are further shaped and aged in the cooling process, so that the structure of the extruded material strips is more stable, and the extruded material strips are cooled to room temperature, thereby being beneficial to subsequent processing and ensuring that the performance of the extruded material strips is not influenced in the subsequent processing process.
In a preferred embodiment, the cooling in step 4) is performed in a water tank, the granulation is performed by a granulator, and the mixing in step 2) is performed in a mixer. The water tank is used, so that the cooling speed is improved, and meanwhile, the performance of the extruded material strip is not influenced; the use of the mixer improves the mixing efficiency, and the mixing is uniform and has better mixing effect; the granulator is convenient for granulation and use.
Compared with the prior art, the invention has the beneficial effects that: the double-screw combination designed by the invention has good matching performance, free running, powerful extrusion on the raw materials, smooth extrusion of the raw materials in the extrusion process and no influence on the performance of the raw materials; the multistage sectional control can be realized, so that the materials are better melted and more uniformly mixed; the shearing efficiency of the glass fiber can be improved, the fiber length is reasonably controlled, the surface of the extruded material strip is smooth, the interior of the extruded material strip is compact, the strip breaking phenomenon is avoided in the extrusion process, the extrusion pressure of a machine head is normal, the material strip is uniformly granulated, the shearing effect is good, and the product performance is good; the various properties of the PA6 and glass fiber extrusion molding processing material can be improved without changing the raw material formula or the processing technology, and the like, thereby not only improving the use efficiency and the production efficiency of the screw combination, but also greatly reducing the production cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a screw structure according to a first embodiment of the present invention;
in the figure: 1-a conveying section; 2-conveying the compression section; 3-plasticizing and mixing section; 4-a first dispersive mixing section; 5-feeding on a natural exhaust side and adding a glass fiber section; 6-glass fiber distribution mixing section; 7-a second dispersive mixing section; 8-vacuum exhaust section; 9-conveying the homogenization section.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention relates to a double-screw combination for extrusion processing of nylon and glass fiber, which comprises two screws, wherein the two screws are mutually meshed, and each screw comprises a plurality of thread elements and a plurality of kneading elements; each screw is divided into 9 sections of a conveying section, a conveying compression section, a plasticizing mixing section, a first dispersing mixing section, a natural exhaust side feeding and glass fiber adding section, a glass fiber distributing mixing section, a second dispersing mixing section, a vacuum exhaust section and a conveying homogenizing section which are connected in sequence; the plurality of threaded elements comprises a plurality of forward threaded elements and a plurality of reverse threaded elements, the plurality of kneading elements comprises a plurality of forward kneading elements and a plurality of reverse kneading elements, the threaded elements comprise any one or more of 22/11, 22/22, 32/32 or 48/48, and the kneading elements comprise any one or more of 45/5/22, 45/5/32 or 90/5/32.
Preferably, the conveying section comprises the following elements in sequence: 32/32a, 48/48, 48/48, 48/48; the conveying compression section sequentially comprises the following elements: 32/32, 32/32, 22/22, 22/22; the plasticizing mixing section comprises the following elements in sequence: 45/5/32, 45/5/32, 32/32, 32/32, 22/22; the first dispersive mixing section comprises the following elements in sequence: 45/5/32, 90/5/32, 45/5/32, 22/11L; the natural exhaust side feeding and glass fiber adding section sequentially comprises the following elements: 48/48, 48/48, 48/48; the glass fiber distribution mixing section sequentially comprises the following elements: 32/32, 22/22, 22/22; the second dispersing and mixing section comprises the following elements in sequence: 45/5/32, 45/5/32, 90/5/32, 48/48, 48/48, 32/32, 32/32, 22/22, 45/5/32, 90/5/32, 45/5/32L, 22/11L; the vacuum exhaust section comprises the following elements in sequence: 48/48, 48/48, 48/48; the conveying homogenizing section sequentially comprises the following elements: 32/32, 32/32, 32/32, 32/32, 22/22, 22/22.
Preferably, the conveying section comprises the following elements in sequence: 32/32a, 48/48, 48/48; the conveying compression section sequentially comprises the following elements: 32/32, 32/32, 32/32, 22/22, 22/22; the plasticizing mixing section comprises the following elements in sequence: 45/5/32, 45/5/22, 32/32; the first dispersive mixing section comprises the following elements in sequence: 45/5/32, 45/5/32, 45/5/32L, 32/32, 45/5/22, 45/5/22, 45/5/32, 22/11L; the natural exhaust side feeding and glass fiber adding section sequentially comprises the following elements: 48/48, 48/48, 32/32, 32/32; the glass fiber distribution mixing section sequentially comprises the following elements: 48/48, 48/48, 32/32, 32/32; the second dispersing and mixing section comprises the following elements in sequence: 48/48, 48/48, 32/32, 22/22, 45/5/32, 45/5/22, 22/22, 45/5/32, 90/5/32, 45/5/32L, 22/22, 45/5/22, 45/5/22, 22/11L; the vacuum exhaust section comprises the following elements in sequence: 48/48, 48/48, 32/32; the conveying homogenizing section sequentially comprises the following elements: 32/32, 32/32, 32/32, 22/22, 22/22, 22/22.
Preferably, the conveying section comprises the following elements in sequence: 32/32a, 48/48, 48/48, 48/48; the conveying compression section sequentially comprises the following elements: 32/32, 32/32, 22/22, 22/22; the plasticizing mixing section comprises the following elements in sequence: 45/5/32, 45/5/32, 32/32, 32/32, 22/22; the first dispersive mixing section comprises the following elements in sequence: 45/5/32, 90/5/32, 45/5/32, 22/11L; the natural exhaust side feeding and glass fiber adding section sequentially comprises the following elements: 48/48, 48/48, 32/32, 32/32; the glass fiber distribution mixing section sequentially comprises the following elements: 22/22, 22/22; the second dispersing and mixing section comprises the following elements in sequence: 45/5/32, 45/5/32, 45/5/22, 48/48, 48/48, 32/32, 32/32, 45/5/32, 90/5/32, 45/5/32L, 32/32, 22/11L; the vacuum exhaust section comprises the following elements in sequence: 48/48, 48/48, 48/48; the conveying homogenizing section sequentially comprises the following elements: 32/32, 32/32, 22/22, 22/22, 22/22, 22/22, 22/22.
Preferably, the conveying section comprises the following elements in sequence: 32/32a, 48/48, 48/48, 32/32; the conveying compression section sequentially comprises the following elements: 32/32, 22/22, 22/22, 22/22; the plasticizing mixing section comprises the following elements in sequence: 45/5/32, 45/5/32, 32/32, 90/5/32, 45/5/22, 45/5/22, 45/5/32L, 22/22; the first dispersive mixing section comprises the following elements in sequence: 90/5/32, 45/5/32, 22/11L; the natural exhaust side feeding and glass fiber adding section sequentially comprises the following elements: 48/48, 48/48, 48/48, 32/32, 32/32; the glass fiber distribution mixing section sequentially comprises the following elements: 48/48, 48/48, 32/32, 32/32; the second dispersing and mixing section comprises the following elements in sequence: 48/48, 32/32, 45/5/22, 45/5/22L, 22/22, 22/22, 45/5/22, 90/5/32, 32/32, 45/5/22, 45/5/22, 22/11L; the vacuum exhaust section comprises the following elements in sequence: 48/48, 48/48; the conveying homogenizing section sequentially comprises the following elements: 32/32, 32/32, 32/32, 32/32, 22/22, 22/22, 22/22.
Preferably, the conveying section comprises the following elements in sequence: 32/32a, 48/48, 48/48, 48/48; the conveying compression section sequentially comprises the following elements: 32/32, 32/32, 22/22, 22/22; the plasticizing mixing section comprises the following elements in sequence: 45/5/32, 45/5/32, 32/32, 22/22, 22/22; the first dispersive mixing section comprises the following elements in sequence: 45/5/32, 90/5/32, 45/5/32, 22/11L; the natural exhaust side feeding and glass fiber adding section sequentially comprises the following elements: 48/48, 48/48, 32/32; the glass fiber distribution mixing section sequentially comprises the following elements: 32/32, 22/22, 22/22; the second dispersing and mixing section comprises the following elements in sequence: 45/5/32, 45/5/32, 45/5/32, 48/48, 48/48, 32/32, 32/32, 45/5/32, 90/5/32, 45/5/32L, 32/32, 22/11L; the vacuum exhaust section comprises the following elements in sequence: 48/48, 48/48, 48/48; the conveying homogenizing section sequentially comprises the following elements: 32/32, 32/32, 22/22, 22/22, 22/22, 22/22, 22/22.
Specifically, each screw had a length of 1440mm and a diameter of 35 mm.
The invention relates to a method for extrusion processing of nylon and glass fiber, which comprises the following steps: 1) weighing the following raw materials in parts by weight: 50-75 parts of PA6 resin, 20-35 parts of glass fiber, 2-4 parts of antimony trioxide, 8-12 parts of brominated styrene, 0.1-0.8 part of antioxidant and 0.1-0.8 part of lubricant; 2) mixing the PA6 resin, antimony trioxide, brominated styrene, an antioxidant and a lubricant in the raw materials weighed in the step 1); 3) adding the uniformly mixed material obtained in the step 2) into the double-screw combination for nylon and glass fiber extrusion processing according to any one of claims 1-6, extruding, adding glass fiber into a side feeding port, and co-extruding; the temperature of the conveying section is 210-220 ℃, the temperature of the conveying compression section is 260 ℃, the temperature of the plasticizing mixing section is 265 ℃, the temperature of the first dispersing mixing section is 275 ℃, the temperature of the natural exhaust side feeding and glass fiber section is 275 ℃, the temperature of the glass fiber distribution mixing section is 275 ℃, the temperature of the second dispersing mixing section is 275 ℃, the temperature of the vacuum exhaust section is 265 ℃ and the temperature of the conveying homogenizing section is 280 ℃; 4) and 3) cooling and granulating the extruded material strips obtained in the step 3) to obtain the product.
Preferably, in step 4), cooling to room temperature is performed while cooling.
Specifically, in step 4), cooling is performed in a water tank, granulation is performed by using a granulator, and in step 2), mixing is performed in a mixer.
Example one
Referring to FIG. 1, a twin screw assembly for extrusion processing of nylon and glass fibers according to the present invention comprises two screws intermeshing, each screw comprising a plurality of thread elements and a plurality of kneading elements; each screw is divided into 9 sections including a conveying section 1, a conveying compression section 2, a plasticizing mixing section 3, a first dispersing mixing section 4, a natural exhaust side feeding and glass fiber adding section 5, a glass fiber distributing mixing section 6, a second dispersing mixing section 7, a vacuum exhaust section 8 and a conveying homogenizing section 9 which are connected in sequence; the plurality of threaded elements comprises a plurality of forward threaded elements and a plurality of reverse threaded elements, the plurality of kneading elements comprises a plurality of forward kneading elements and a plurality of reverse kneading elements, the threaded elements comprise any one or more of 22/11, 22/22, 32/32 or 48/48, and the kneading elements comprise any one or more of 45/5/22, 45/5/32 or 90/5/32;
wherein, the conveying section 1 comprises the following elements in sequence: 32/32a, 48/48, 48/48, 48/48;
the conveying and compressing section 2 comprises the following elements in sequence: 32/32, 32/32, 22/22, 22/22;
the plasticization and mixing section 3 comprises the following elements in sequence: 45/5/32, 45/5/32, 32/32, 32/32, 22/22;
the first dispersive mixing section 4 comprises the following elements in sequence: 45/5/32, 90/5/32, 45/5/32, 22/11L;
the natural exhaust side feeding and glass fiber adding section 5 sequentially comprises the following elements: 48/48, 48/48, 48/48;
the glass fiber distribution mixing section 6 comprises the following elements in sequence: 32/32, 22/22, 22/22;
the second dispersive mixing section 7 comprises the following elements in sequence: 45/5/32, 45/5/32, 90/5/32, 48/48, 48/48, 32/32, 32/32, 22/22, 45/5/32, 90/5/32, 45/5/32L, 22/11L;
the vacuum exhaust section 8 comprises the following elements in sequence: 48/48, 48/48, 48/48;
the conveying and homogenizing section 9 comprises the following elements in sequence: 32/32, 32/32, 32/32, 32/32, 22/22, 22/22.
The invention relates to a method for extrusion processing of nylon and glass fiber, which comprises the following steps:
1) weighing the following raw materials in parts by weight: 57 parts of PA6 resin, 30 parts of glass fiber, 3 parts of antimony trioxide, 10 parts of brominated styrene, 0.5 part of antioxidant and 0.5 part of lubricant;
2) adding the PA6 resin, antimony trioxide, brominated styrene, an antioxidant and a lubricant in the raw materials weighed in the step 1) into a mixer, and mixing;
3) adding the uniformly mixed material obtained in the step 2) into the double-screw combination for extrusion processing of nylon and glass fiber, extruding, adding glass fiber into a side feeding port, and co-extruding; the temperature of the conveying section is 210-220 ℃, the temperature of the conveying compression section is 260 ℃, the temperature of the plasticizing mixing section is 265 ℃, the temperature of the first dispersing mixing section is 275 ℃, the temperature of the natural exhaust side feeding and glass fiber feeding section is 275 ℃, the temperature of the glass fiber distributing mixing section is 275 ℃, the temperature of the second dispersing mixing section is 275 ℃, the temperature of the vacuum exhaust section is 265 ℃ and the temperature of the conveying homogenizing section is 280 ℃;
4) and 3) cooling and granulating the extruded material strips obtained in the step 3) to obtain the product.
Example two
The invention relates to a double-screw combination for extrusion processing of nylon and glass fiber, which comprises two screws, wherein the two screws are mutually meshed, and each screw comprises a plurality of thread elements and a plurality of kneading elements; each screw is divided into 9 sections of a conveying section, a conveying compression section, a plasticizing mixing section, a first dispersing mixing section, a natural exhaust side feeding and glass fiber adding section, a glass fiber distributing mixing section, a second dispersing mixing section, a vacuum exhaust section and a conveying homogenizing section which are connected in sequence; the plurality of threaded elements comprises a plurality of forward threaded elements and a plurality of reverse threaded elements, the plurality of kneading elements comprises a plurality of forward kneading elements and a plurality of reverse kneading elements, the threaded elements comprise any one or more of 22/11, 22/22, 32/32 or 48/48, and the kneading elements comprise any one or more of 45/5/22, 45/5/32 or 90/5/32;
wherein, the conveying section includes the following component in proper order: 32/32a, 48/48, 48/48;
the conveying compression section sequentially comprises the following elements: 32/32, 32/32, 32/32, 22/22, 22/22;
the plasticizing mixing section comprises the following elements in sequence: 45/5/32, 45/5/22, 32/32;
the first dispersive mixing section comprises the following elements in sequence: 45/5/32, 45/5/32, 45/5/32L, 32/32, 45/5/22, 45/5/22, 45/5/32, 22/11L;
the natural exhaust side feeding and glass fiber adding section sequentially comprises the following elements: 48/48, 48/48, 32/32, 32/32;
the glass fiber distribution mixing section sequentially comprises the following elements: 48/48, 48/48, 32/32, 32/32;
the second dispersing and mixing section comprises the following elements in sequence: 48/48, 48/48, 32/32, 22/22, 45/5/32, 45/5/22, 22/22, 45/5/32, 90/5/32, 45/5/32L, 22/22, 45/5/22, 45/5/22, 22/11L;
the vacuum exhaust section comprises the following elements in sequence: 48/48, 48/48, 32/32;
the conveying homogenizing section sequentially comprises the following elements: 32/32, 32/32, 32/32, 22/22, 22/22, 22/22.
The invention relates to a method for extrusion processing of nylon and glass fiber, which comprises the following steps:
1) weighing the following raw materials in parts by weight: 57 parts of PA6 resin, 30 parts of glass fiber, 3 parts of antimony trioxide, 10 parts of brominated styrene, 0.5 part of antioxidant and 0.5 part of lubricant;
2) adding the PA6 resin, antimony trioxide, brominated styrene, an antioxidant and a lubricant in the raw materials weighed in the step 1) into a mixer, and mixing;
3) adding the uniformly mixed material obtained in the step 2) into the double-screw combination for extrusion processing of nylon and glass fiber, extruding, adding glass fiber into a side feeding port, and co-extruding; the temperature of the conveying section is 210-220 ℃, the temperature of the conveying compression section is 260 ℃, the temperature of the plasticizing mixing section is 265 ℃, the temperature of the first dispersing mixing section is 275 ℃, the temperature of the natural exhaust side feeding and glass fiber feeding section is 275 ℃, the temperature of the glass fiber distributing mixing section is 275 ℃, the temperature of the second dispersing mixing section is 275 ℃, the temperature of the vacuum exhaust section is 265 ℃ and the temperature of the conveying homogenizing section is 280 ℃;
4) and (3) cooling the extruded material strips obtained in the step 3) through a water tank, cooling to room temperature, and granulating to obtain the product.
EXAMPLE III
The invention relates to a double-screw combination for extrusion processing of nylon and glass fiber, which comprises two screws, wherein the two screws are mutually meshed, and each screw comprises a plurality of thread elements and a plurality of kneading elements; each screw is divided into 9 sections of a conveying section, a conveying compression section, a plasticizing mixing section, a first dispersing mixing section, a natural exhaust side feeding and glass fiber adding section, a glass fiber distributing mixing section, a second dispersing mixing section, a vacuum exhaust section and a conveying homogenizing section which are connected in sequence; the plurality of threaded elements comprises a plurality of forward threaded elements and a plurality of reverse threaded elements, the plurality of kneading elements comprises a plurality of forward kneading elements and a plurality of reverse kneading elements, the threaded elements comprise any one or more of 22/11, 22/22, 32/32 or 48/48, and the kneading elements comprise any one or more of 45/5/22, 45/5/32 or 90/5/32;
wherein, the conveying section includes the following component in proper order: 32/32a, 48/48, 48/48, 48/48;
the conveying compression section sequentially comprises the following elements: 32/32, 32/32, 22/22, 22/22;
the plasticizing mixing section comprises the following elements in sequence: 45/5/32, 45/5/32, 32/32, 32/32, 22/22;
the first dispersive mixing section comprises the following elements in sequence: 45/5/32, 90/5/32, 45/5/32, 22/11L;
the natural exhaust side feeding and glass fiber adding section sequentially comprises the following elements: 48/48, 48/48, 32/32, 32/32;
the glass fiber distribution mixing section sequentially comprises the following elements: 22/22, 22/22;
the second dispersing and mixing section comprises the following elements in sequence: 45/5/32, 45/5/32, 45/5/22, 48/48, 48/48, 32/32, 32/32, 45/5/32, 90/5/32, 45/5/32L, 32/32, 22/11L;
the vacuum exhaust section comprises the following elements in sequence: 48/48, 48/48, 48/48;
the conveying homogenizing section sequentially comprises the following elements: 32/32, 32/32, 22/22, 22/22, 22/22, 22/22, 22/22.
The invention relates to a method for extrusion processing of nylon and glass fiber, which comprises the following steps:
1) weighing the following raw materials in parts by weight: 57 parts of PA6 resin, 30 parts of glass fiber, 3 parts of antimony trioxide, 10 parts of brominated styrene, 0.5 part of antioxidant and 0.5 part of lubricant;
2) adding the PA6 resin, antimony trioxide, brominated styrene, an antioxidant and a lubricant in the raw materials weighed in the step 1) into a mixer, and mixing;
3) adding the uniformly mixed material obtained in the step 2) into the double-screw combination for extrusion processing of nylon and glass fiber, extruding, adding glass fiber into a side feeding port, and co-extruding; the temperature of the conveying section is 210-220 ℃, the temperature of the conveying compression section is 260 ℃, the temperature of the plasticizing mixing section is 265 ℃, the temperature of the first dispersing mixing section is 275 ℃, the temperature of the natural exhaust side feeding and glass fiber feeding section is 275 ℃, the temperature of the glass fiber distributing mixing section is 275 ℃, the temperature of the second dispersing mixing section is 275 ℃, the temperature of the vacuum exhaust section is 265 ℃ and the temperature of the conveying homogenizing section is 280 ℃;
4) and 3) cooling the extruded material strips obtained in the step 3) to room temperature through a water tank, and granulating through a granulator to obtain the product.
Example four
The invention relates to a double-screw combination for extrusion processing of nylon and glass fiber, which comprises two screws, wherein the two screws are mutually meshed, and each screw comprises a plurality of thread elements and a plurality of kneading elements; each screw is divided into 9 sections of a conveying section, a conveying compression section, a plasticizing mixing section, a first dispersing mixing section, a natural exhaust side feeding and glass fiber adding section, a glass fiber distributing mixing section, a second dispersing mixing section, a vacuum exhaust section and a conveying homogenizing section which are connected in sequence; the plurality of threaded elements comprises a plurality of forward threaded elements and a plurality of reverse threaded elements, the plurality of kneading elements comprises a plurality of forward kneading elements and a plurality of reverse kneading elements, the threaded elements comprise any one or more of 22/11, 22/22, 32/32 or 48/48, and the kneading elements comprise any one or more of 45/5/22, 45/5/32 or 90/5/32;
wherein, the conveying section includes the following component in proper order: 32/32a, 48/48, 48/48, 32/32;
the conveying compression section sequentially comprises the following elements: 32/32, 22/22, 22/22, 22/22;
the plasticizing mixing section comprises the following elements in sequence: 45/5/32, 45/5/32, 32/32, 90/5/32, 45/5/22, 45/5/22, 45/5/32L, 22/22;
the first dispersive mixing section comprises the following elements in sequence: 90/5/32, 45/5/32, 22/11L;
the natural exhaust side feeding and glass fiber adding section sequentially comprises the following elements: 48/48, 48/48, 48/48, 32/32, 32/32;
the glass fiber distribution mixing section sequentially comprises the following elements: 48/48, 48/48, 32/32, 32/32;
the second dispersing and mixing section comprises the following elements in sequence: 48/48, 32/32, 45/5/22, 45/5/22L, 22/22, 22/22, 45/5/22, 45/5/22, 90/5/32, 32/32, 45/5/22, 45/5/22, 22/11L;
the vacuum exhaust section comprises the following elements in sequence: 48/48, 48/48;
the conveying homogenizing section sequentially comprises the following elements: 32/32, 32/32, 32/32, 32/32, 22/22, 22/22, 22/22.
The invention relates to a method for extrusion processing of nylon and glass fiber, which comprises the following steps:
1) weighing the following raw materials in parts by weight: 57 parts of PA6 resin, 30 parts of glass fiber, 3 parts of antimony trioxide, 10 parts of brominated styrene, 0.5 part of antioxidant and 0.5 part of lubricant;
2) adding the PA6 resin, antimony trioxide, brominated styrene, an antioxidant and a lubricant in the raw materials weighed in the step 1) into a mixer, and mixing;
3) adding the uniformly mixed material obtained in the step 2) into the double-screw combination for extrusion processing of nylon and glass fiber, extruding, adding glass fiber into a side feeding port, and co-extruding; the temperature of the conveying section is 210-220 ℃, the temperature of the conveying compression section is 260 ℃, the temperature of the plasticizing mixing section is 265 ℃, the temperature of the first dispersing mixing section is 275 ℃, the temperature of the natural exhaust side feeding and glass fiber feeding section is 275 ℃, the temperature of the glass fiber distributing mixing section is 275 ℃, the temperature of the second dispersing mixing section is 275 ℃, the temperature of the vacuum exhaust section is 265 ℃ and the temperature of the conveying homogenizing section is 280 ℃;
4) and 3) cooling the extruded material strips obtained in the step 3) to room temperature through a water tank, and granulating through a granulator to obtain the product.
EXAMPLE five
The invention relates to a double-screw combination for extrusion processing of nylon and glass fiber, which comprises two screws, wherein the two screws are mutually meshed, and each screw comprises a plurality of thread elements and a plurality of kneading elements; each screw is divided into 9 sections of a conveying section, a conveying compression section, a plasticizing mixing section, a first dispersing mixing section, a natural exhaust side feeding and glass fiber adding section, a glass fiber distributing mixing section, a second dispersing mixing section, a vacuum exhaust section and a conveying homogenizing section which are connected in sequence; the plurality of threaded elements comprises a plurality of forward threaded elements and a plurality of reverse threaded elements, the plurality of kneading elements comprises a plurality of forward kneading elements and a plurality of reverse kneading elements, the threaded elements comprise any one or more of 22/11, 22/22, 32/32 or 48/48, and the kneading elements comprise any one or more of 45/5/22, 45/5/32 or 90/5/32;
wherein, the conveying section includes the following component in proper order: 32/32a, 48/48, 48/48, 48/48;
the conveying compression section sequentially comprises the following elements: 32/32, 32/32, 22/22, 22/22;
the plasticizing mixing section comprises the following elements in sequence: 45/5/32, 45/5/32, 32/32, 22/22, 22/22;
the first dispersive mixing section comprises the following elements in sequence: 45/5/32, 90/5/32, 45/5/32, 22/11L;
the natural exhaust side feeding and glass fiber adding section sequentially comprises the following elements: 48/48, 48/48, 32/32;
the glass fiber distribution mixing section sequentially comprises the following elements: 32/32, 22/22, 22/22;
the second dispersing and mixing section comprises the following elements in sequence: 45/5/32, 45/5/32, 45/5/32, 48/48, 48/48, 32/32, 32/32, 45/5/32, 90/5/32, 45/5/32L, 32/32, 22/11L;
the vacuum exhaust section comprises the following elements in sequence: 48/48, 48/48, 48/48;
the conveying homogenizing section sequentially comprises the following elements: 32/32, 32/32, 22/22, 22/22, 22/22, 22/22, 22/22.
The invention relates to a method for extrusion processing of nylon and glass fiber, which comprises the following steps:
1) weighing the following raw materials in parts by weight: 57 parts of PA6 resin, 30 parts of glass fiber, 3 parts of antimony trioxide, 10 parts of brominated styrene, 0.5 part of antioxidant and 0.5 part of lubricant;
2) adding the PA6 resin, antimony trioxide, brominated styrene, an antioxidant and a lubricant in the raw materials weighed in the step 1) into a mixer, and mixing;
3) adding the uniformly mixed material obtained in the step 2) into the double-screw combination for extrusion processing of nylon and glass fiber, extruding, adding glass fiber into a side feeding port, and co-extruding; the temperature of the conveying section is 210-220 ℃, the temperature of the conveying compression section is 260 ℃, the temperature of the plasticizing mixing section is 265 ℃, the temperature of the first dispersing mixing section is 275 ℃, the temperature of the natural exhaust side feeding and glass fiber feeding section is 275 ℃, the temperature of the glass fiber distributing mixing section is 275 ℃, the temperature of the second dispersing mixing section is 275 ℃, the temperature of the vacuum exhaust section is 265 ℃ and the temperature of the conveying homogenizing section is 280 ℃;
4) and 3) cooling the extruded material strips obtained in the step 3) to room temperature through a water tank, and granulating through a granulator to obtain the product.
Comparative example 1
A traditional double-screw combination comprises two screws which are mutually meshed, wherein each screw comprises 7 sections which are a feeding section, a conveying and compressing section, a plasticizing and dispersing and mixing section, a natural exhaust side feeding and glass fiber section, a glass fiber melting and mixing section, a vacuum exhaust section and a conveying and homogenizing section which are sequentially connected from left to right;
wherein, the feed section includes following component in proper order: 32/32a, 48/48, 48/48, 48/48;
the conveying compression section sequentially comprises the following elements: 32/32, 32/32, 32/32, 32/32, 22/22, 22/22;
the plasticizing dispersion mixing section comprises the following elements in sequence: 45/5/32, 45/5/32, 45/5/32L, 32/32, 45/5/32, 90/5/32, 45/5/22, 22/11L;
the natural exhaust side feeding and glass fiber adding section sequentially comprises the following elements: 48/48, 48/48, 32/32, 32/32;
the glass fiber melt mixing section comprises the following elements in sequence: 45/5/32, 45/5/22, 45/5/22, 32/32, 32/32, 22/22, 45/5/32, 45/5/22, 45/5/22, 32/32, 32/32, 45/5/22, 45/5/22, 45/5/22, 22/22, 22/11L;
the vacuum exhaust section comprises the following elements in sequence: 48/48, 48/48;
the conveying homogenizing section sequentially comprises the following elements: 32/32, 32/32, 32/32, 32/32, 32/32, 22/22, 22/22.
And extruding and granulating in the traditional screw combination by adopting raw materials with the same formula and the same extrusion process to obtain a control sample.
The extruded nylon products obtained in examples one to five were subjected to respective performance test tests with respect to a control, wherein the test results were shown in Table 1, and the tensile strength, elongation at break, flexural strength, notched Izod impact strength and flame retardancy were obtained, the tensile strength was measured according to the method specified in ASTM/D638, the elongation at break was measured according to the method specified in ASTM/D638, the flexural strength was measured according to the method specified in ASTM/D790, the notched Izod impact strength was measured according to the method specified in ASTM/D256, and the flame retardancy was measured according to the method specified in UL 94.
TABLE 1 Performance test results for materials extruded from conventional screw combinations and screw combinations of the present invention
As can be seen from Table 1, the notched impact strength of the nylon material processed in the twin-screw combination of the invention is 164-178J/m, which is significantly higher than that of the control sample; the tensile strength of the nylon material processed in the double-screw combination is 165-178MPa, which is also obviously higher than that of a control sample; the elongation at break of the nylon material processed in the double-screw combination is 3.2-3.5%, which is not much different from a control sample; the bending strength of the nylon material processed in the double-screw combination is 181-196MPa, which is obviously higher than that of a control sample; although the flame retardant formulations of examples one through five of the present invention were the same as the control, the nylon materials processed in the twin screw combination of the present invention had better flammability ratings than the control because the materials were more uniformly mixed and the interaction between the materials was stronger during processing. Meanwhile, the screw combination in the invention can uniformly shear the glass fiber, and has good blending and melting effects with the material. Therefore, the mechanical property of the nylon material processed by the double-screw combination of the invention is obviously improved.
The processing conditions in the extrusion processing of the nylon plastic material of examples one to five and the processing conditions in the extrusion processing of the plastic material of the conventional screw combination, i.e., the processing conditions of comparative example one, are summarized in Table 2. As can be seen from Table 2, when the screw combination is used for processing nylon plastic materials by extrusion molding, the screw combination has the advantages of stable operation, smooth extrusion, smooth surface of material strips, compact interior of the material strips, no strip breakage phenomenon in the extrusion process, normal extrusion pressure of a machine head, uniform grain cutting of the material strips, good shearing effect of the screw combination on glass fibers and good material performance. When the traditional screw combination is used for processing plastic materials by extrusion molding, the glass fibers are sheared too scattered, the blending and melting effects with materials are poor, and the influence on the properties of the materials is small.
TABLE 2 processability of conventional screw combinations and screw combinations of the invention for extrusion processing of nylon materials
Compared with the prior art, the invention has the beneficial effects that: the double-screw combination designed by the invention has good matching performance, free running, powerful extrusion on the raw materials, smooth extrusion of the raw materials in the extrusion process and no influence on the performance of the raw materials; the multistage sectional control can be realized, so that the materials are better melted and more uniformly mixed; the shearing efficiency of the glass fiber can be improved, the fiber length is reasonably controlled, the surface of the extruded material strip is smooth, the interior of the extruded material strip is compact, the strip breaking phenomenon is avoided in the extrusion process, the extrusion pressure of a machine head is normal, the material strip is uniformly granulated, the shearing effect is good, and the product performance is good; the various properties of the PA6 and glass fiber extrusion molding processing material can be improved without changing the raw material formula or the processing technology, and the like, thereby not only improving the use efficiency and the production efficiency of the screw combination, but also greatly reducing the production cost.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A method for extrusion molding processing of nylon and glass fiber is characterized in that: the method comprises the following steps:
1) weighing the following raw materials in parts by weight: 50-75 parts of PA6 resin, 20-35 parts of glass fiber, 2-4 parts of antimony trioxide, 8-12 parts of brominated styrene, 0.1-0.8 part of antioxidant and 0.1-0.8 part of lubricant;
2) mixing the PA6 resin, antimony trioxide, brominated styrene, an antioxidant and a lubricant in the raw materials weighed in the step 1);
3) adding the uniformly mixed materials in the step 2) into a double-screw combination, extruding, adding glass fibers into a side feeding port, and co-extruding;
the twin screw combination comprises two screws, the two screws being intermeshed, each of the screws comprising a plurality of thread elements and a plurality of kneading elements;
each screw is divided into 9 sections including a conveying section, a conveying compression section, a plasticizing mixing section, a first dispersing mixing section, a natural exhaust side feeding and glass fiber adding section, a glass fiber distributing mixing section, a second dispersing mixing section, a vacuum exhaust section and a conveying homogenizing section which are connected in sequence;
the temperature of the conveying section is 210-220 ℃, the temperature of the conveying compression section is 260 ℃, the temperature of the plasticizing mixing section is 265 ℃, the temperature of the first dispersing mixing section is 275 ℃, the temperature of the natural exhaust side feeding and glass fiber section is 275 ℃, the temperature of the glass fiber distribution mixing section is 275 ℃, the temperature of the second dispersing mixing section is 275 ℃, the temperature of the vacuum exhaust section is 265 ℃ and the temperature of the conveying homogenizing section is 280 ℃;
the plurality of screw elements comprise a plurality of forward screw elements and a plurality of reverse screw elements, the plurality of kneading elements comprise a plurality of forward kneading elements and a plurality of reverse kneading elements, the screw elements comprise any one or more of 22/11, 22/22, 32/32 or 48/48, and the kneading elements comprise any one or more of 45/5/22, 45/5/32 or 90/5/32;
the conveying section comprises the following elements in sequence: 32/32a, 48/48, 48/48, 48/48;
the conveying compression section sequentially comprises the following elements: 32/32, 32/32, 22/22, 22/22;
the plasticizing mixing section comprises the following elements in sequence: 45/5/32, 45/5/32, 32/32, 32/32, 22/22;
the first dispersive mixing section comprises the following elements in sequence: 45/5/32, 90/5/32, 45/5/32, 22/11L;
the natural exhaust side feeding and glass fiber adding section sequentially comprises the following elements: 48/48, 48/48, 48/48;
the glass fiber distribution mixing section sequentially comprises the following elements: 32/32, 22/22, 22/22;
the second dispersing and mixing section comprises the following elements in sequence: 45/5/32, 45/5/32, 90/5/32, 48/48, 48/48, 32/32, 32/32, 22/22, 45/5/32, 90/5/32, 45/5/32L, 22/11L;
the vacuum exhaust section comprises the following elements in sequence: 48/48, 48/48, 48/48;
the conveying homogenizing section sequentially comprises the following elements: 32/32, 32/32, 32/32, 32/32, 22/22, 22/22;
4) and 3) cooling and granulating the extruded material strips obtained in the step 3) to obtain the product.
2. A method for extrusion molding processing of nylon and glass fiber is characterized in that: the method comprises the following steps:
1) weighing the following raw materials in parts by weight: 50-75 parts of PA6 resin, 20-35 parts of glass fiber, 2-4 parts of antimony trioxide, 8-12 parts of brominated styrene, 0.1-0.8 part of antioxidant and 0.1-0.8 part of lubricant;
2) mixing the PA6 resin, antimony trioxide, brominated styrene, an antioxidant and a lubricant in the raw materials weighed in the step 1);
3) adding the uniformly mixed materials in the step 2) into a double-screw combination, extruding, adding glass fibers into a side feeding port, and co-extruding;
the twin screw combination comprises two screws, the two screws being intermeshed, each of the screws comprising a plurality of thread elements and a plurality of kneading elements;
each screw is divided into 9 sections including a conveying section, a conveying compression section, a plasticizing mixing section, a first dispersing mixing section, a natural exhaust side feeding and glass fiber adding section, a glass fiber distributing mixing section, a second dispersing mixing section, a vacuum exhaust section and a conveying homogenizing section which are connected in sequence;
the temperature of the conveying section is 210-220 ℃, the temperature of the conveying compression section is 260 ℃, the temperature of the plasticizing mixing section is 265 ℃, the temperature of the first dispersing mixing section is 275 ℃, the temperature of the natural exhaust side feeding and glass fiber section is 275 ℃, the temperature of the glass fiber distribution mixing section is 275 ℃, the temperature of the second dispersing mixing section is 275 ℃, the temperature of the vacuum exhaust section is 265 ℃ and the temperature of the conveying homogenizing section is 280 ℃;
the plurality of screw elements comprise a plurality of forward screw elements and a plurality of reverse screw elements, the plurality of kneading elements comprise a plurality of forward kneading elements and a plurality of reverse kneading elements, the screw elements comprise any one or more of 22/11, 22/22, 32/32 or 48/48, and the kneading elements comprise any one or more of 45/5/22, 45/5/32 or 90/5/32;
the conveying section comprises the following elements in sequence: 32/32a, 48/48, 48/48;
the conveying compression section sequentially comprises the following elements: 32/32, 32/32, 32/32, 22/22, 22/22;
the plasticizing mixing section comprises the following elements in sequence: 45/5/32, 45/5/22, 32/32;
the first dispersive mixing section comprises the following elements in sequence: 45/5/32, 45/5/32, 45/5/32L, 32/32, 45/5/22, 45/5/22, 45/5/32, 22/11L;
the natural exhaust side feeding and glass fiber adding section sequentially comprises the following elements: 48/48, 48/48, 32/32, 32/32;
the glass fiber distribution mixing section sequentially comprises the following elements: 48/48, 48/48, 32/32, 32/32;
the second dispersing and mixing section comprises the following elements in sequence: 48/48, 48/48, 32/32, 22/22, 45/5/32, 45/5/22, 22/22, 45/5/32, 90/5/32, 45/5/32L, 22/22, 45/5/22, 45/5/22, 22/11L;
the vacuum exhaust section comprises the following elements in sequence: 48/48, 48/48, 32/32;
the conveying homogenizing section sequentially comprises the following elements: 32/32, 32/32, 32/32, 22/22, 22/22, 22/22;
4) and 3) cooling and granulating the extruded material strips obtained in the step 3) to obtain the product.
3. A method for extrusion molding processing of nylon and glass fiber is characterized in that: the method comprises the following steps:
1) weighing the following raw materials in parts by weight: 50-75 parts of PA6 resin, 20-35 parts of glass fiber, 2-4 parts of antimony trioxide, 8-12 parts of brominated styrene, 0.1-0.8 part of antioxidant and 0.1-0.8 part of lubricant;
2) mixing the PA6 resin, antimony trioxide, brominated styrene, an antioxidant and a lubricant in the raw materials weighed in the step 1);
3) adding the uniformly mixed materials in the step 2) into a double-screw combination, extruding, adding glass fibers into a side feeding port, and co-extruding;
the twin screw combination comprises two screws, the two screws being intermeshed, each of the screws comprising a plurality of thread elements and a plurality of kneading elements;
each screw is divided into 9 sections including a conveying section, a conveying compression section, a plasticizing mixing section, a first dispersing mixing section, a natural exhaust side feeding and glass fiber adding section, a glass fiber distributing mixing section, a second dispersing mixing section, a vacuum exhaust section and a conveying homogenizing section which are connected in sequence;
the temperature of the conveying section is 210-220 ℃, the temperature of the conveying compression section is 260 ℃, the temperature of the plasticizing mixing section is 265 ℃, the temperature of the first dispersing mixing section is 275 ℃, the temperature of the natural exhaust side feeding and glass fiber section is 275 ℃, the temperature of the glass fiber distribution mixing section is 275 ℃, the temperature of the second dispersing mixing section is 275 ℃, the temperature of the vacuum exhaust section is 265 ℃ and the temperature of the conveying homogenizing section is 280 ℃;
the plurality of screw elements comprise a plurality of forward screw elements and a plurality of reverse screw elements, the plurality of kneading elements comprise a plurality of forward kneading elements and a plurality of reverse kneading elements, the screw elements comprise any one or more of 22/11, 22/22, 32/32 or 48/48, and the kneading elements comprise any one or more of 45/5/22, 45/5/32 or 90/5/32;
the conveying section comprises the following elements in sequence: 32/32a, 48/48, 48/48, 48/48;
the conveying compression section sequentially comprises the following elements: 32/32, 32/32, 22/22, 22/22;
the plasticizing mixing section comprises the following elements in sequence: 45/5/32, 45/5/32, 32/32, 32/32, 22/22;
the first dispersive mixing section comprises the following elements in sequence: 45/5/32, 90/5/32, 45/5/32, 22/11L;
the natural exhaust side feeding and glass fiber adding section sequentially comprises the following elements: 48/48, 48/48, 32/32, 32/32;
the glass fiber distribution mixing section sequentially comprises the following elements: 22/22, 22/22;
the second dispersing and mixing section comprises the following elements in sequence: 45/5/32, 45/5/32, 45/5/22, 48/48, 48/48, 32/32, 32/32, 45/5/32, 90/5/32, 45/5/32L, 32/32, 22/11L;
the vacuum exhaust section comprises the following elements in sequence: 48/48, 48/48, 48/48;
the conveying homogenizing section sequentially comprises the following elements: 32/32, 32/32, 22/22, 22/22, 22/22, 22/22, 22/22;
4) and 3) cooling and granulating the extruded material strips obtained in the step 3) to obtain the product.
4. A method for extrusion molding processing of nylon and glass fiber is characterized in that: the method comprises the following steps:
1) weighing the following raw materials in parts by weight: 50-75 parts of PA6 resin, 20-35 parts of glass fiber, 2-4 parts of antimony trioxide, 8-12 parts of brominated styrene, 0.1-0.8 part of antioxidant and 0.1-0.8 part of lubricant;
2) mixing the PA6 resin, antimony trioxide, brominated styrene, an antioxidant and a lubricant in the raw materials weighed in the step 1);
3) adding the uniformly mixed materials in the step 2) into a double-screw combination, extruding, adding glass fibers into a side feeding port, and co-extruding;
the twin screw combination comprises two screws, the two screws being intermeshed, each of the screws comprising a plurality of thread elements and a plurality of kneading elements;
each screw is divided into 9 sections including a conveying section, a conveying compression section, a plasticizing mixing section, a first dispersing mixing section, a natural exhaust side feeding and glass fiber adding section, a glass fiber distributing mixing section, a second dispersing mixing section, a vacuum exhaust section and a conveying homogenizing section which are connected in sequence;
the temperature of the conveying section is 210-220 ℃, the temperature of the conveying compression section is 260 ℃, the temperature of the plasticizing mixing section is 265 ℃, the temperature of the first dispersing mixing section is 275 ℃, the temperature of the natural exhaust side feeding and glass fiber section is 275 ℃, the temperature of the glass fiber distribution mixing section is 275 ℃, the temperature of the second dispersing mixing section is 275 ℃, the temperature of the vacuum exhaust section is 265 ℃ and the temperature of the conveying homogenizing section is 280 ℃;
the plurality of screw elements comprise a plurality of forward screw elements and a plurality of reverse screw elements, the plurality of kneading elements comprise a plurality of forward kneading elements and a plurality of reverse kneading elements, the screw elements comprise any one or more of 22/11, 22/22, 32/32 or 48/48, and the kneading elements comprise any one or more of 45/5/22, 45/5/32 or 90/5/32;
the conveying section comprises the following elements in sequence: 32/32a, 48/48, 48/48, 32/32;
the conveying compression section sequentially comprises the following elements: 32/32, 22/22, 22/22, 22/22;
the plasticizing mixing section comprises the following elements in sequence: 45/5/32, 45/5/32, 32/32, 90/5/32, 45/5/22, 45/5/22, 45/5/32L, 22/22;
the first dispersive mixing section comprises the following elements in sequence: 90/5/32, 45/5/32, 22/11L;
the natural exhaust side feeding and glass fiber adding section sequentially comprises the following elements: 48/48, 48/48, 48/48, 32/32, 32/32;
the glass fiber distribution mixing section sequentially comprises the following elements: 48/48, 48/48, 32/32, 32/32;
the second dispersing and mixing section comprises the following elements in sequence: 48/48, 32/32, 45/5/22, 45/5/22L, 22/22, 22/22, 45/5/22, 90/5/32, 32/32, 45/5/22, 45/5/22, 22/11L;
the vacuum exhaust section comprises the following elements in sequence: 48/48, 48/48;
the conveying homogenizing section sequentially comprises the following elements: 32/32, 32/32, 32/32, 32/32, 22/22, 22/22, 22/22;
4) and 3) cooling and granulating the extruded material strips obtained in the step 3) to obtain the product.
5. A method for extrusion molding processing of nylon and glass fiber is characterized in that: the method comprises the following steps:
1) weighing the following raw materials in parts by weight: 50-75 parts of PA6 resin, 20-35 parts of glass fiber, 2-4 parts of antimony trioxide, 8-12 parts of brominated styrene, 0.1-0.8 part of antioxidant and 0.1-0.8 part of lubricant;
2) mixing the PA6 resin, antimony trioxide, brominated styrene, an antioxidant and a lubricant in the raw materials weighed in the step 1);
3) adding the uniformly mixed materials in the step 2) into a double-screw combination, extruding, adding glass fibers into a side feeding port, and co-extruding;
the twin screw combination comprises two screws, the two screws being intermeshed, each of the screws comprising a plurality of thread elements and a plurality of kneading elements;
each screw is divided into 9 sections including a conveying section, a conveying compression section, a plasticizing mixing section, a first dispersing mixing section, a natural exhaust side feeding and glass fiber adding section, a glass fiber distributing mixing section, a second dispersing mixing section, a vacuum exhaust section and a conveying homogenizing section which are connected in sequence;
the temperature of the conveying section is 210-220 ℃, the temperature of the conveying compression section is 260 ℃, the temperature of the plasticizing mixing section is 265 ℃, the temperature of the first dispersing mixing section is 275 ℃, the temperature of the natural exhaust side feeding and glass fiber section is 275 ℃, the temperature of the glass fiber distribution mixing section is 275 ℃, the temperature of the second dispersing mixing section is 275 ℃, the temperature of the vacuum exhaust section is 265 ℃ and the temperature of the conveying homogenizing section is 280 ℃;
the plurality of screw elements comprise a plurality of forward screw elements and a plurality of reverse screw elements, the plurality of kneading elements comprise a plurality of forward kneading elements and a plurality of reverse kneading elements, the screw elements comprise any one or more of 22/11, 22/22, 32/32 or 48/48, and the kneading elements comprise any one or more of 45/5/22, 45/5/32 or 90/5/32;
the conveying section comprises the following elements in sequence: 32/32a, 48/48, 48/48, 48/48;
the conveying compression section sequentially comprises the following elements: 32/32, 32/32, 22/22, 22/22;
the plasticizing mixing section comprises the following elements in sequence: 45/5/32, 45/5/32, 32/32, 22/22, 22/22;
the first dispersive mixing section comprises the following elements in sequence: 45/5/32, 90/5/32, 45/5/32, 22/11L;
the natural exhaust side feeding and glass fiber adding section sequentially comprises the following elements: 48/48, 48/48, 32/32;
the glass fiber distribution mixing section sequentially comprises the following elements: 32/32, 22/22, 22/22;
the second dispersing and mixing section comprises the following elements in sequence: 45/5/32, 45/5/32, 45/5/32, 48/48, 48/48, 32/32, 32/32, 45/5/32, 90/5/32, 45/5/32L, 32/32, 22/11L;
the vacuum exhaust section comprises the following elements in sequence: 48/48, 48/48, 48/48;
the conveying homogenizing section sequentially comprises the following elements: 32/32, 32/32, 22/22, 22/22, 22/22, 22/22, 22/22;
4) and 3) cooling and granulating the extruded material strips obtained in the step 3) to obtain the product.
6. A method of extrusion processing of nylon and glass fibers according to any of claims 1-5, characterized in that:
the length of each screw is 1440mm, and the diameter is 35 mm.
7. A method of extrusion processing of nylon and glass fibers according to any of claims 1-5, characterized in that:
and in the step 4), cooling to room temperature during cooling.
8. A method of nylon and glass fiber extrusion processing according to claim 7, wherein:
in the step 4), cooling is performed in a water tank, granulation is performed by using a granulator, and in the step 2), mixing is performed in a mixer.
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| CN112592534B (en) * | 2020-11-30 | 2022-12-06 | 金发科技股份有限公司 | Preparation method of toughened and reinforced polypropylene composite material |
| CN113895016B (en) * | 2021-09-07 | 2024-03-15 | 广州华新科智造技术有限公司 | Double-screw combination and processing technology for melting modification processing of polyvinyl alcohol material |
| CN113977908A (en) * | 2021-11-26 | 2022-01-28 | 中化泉州能源科技有限责任公司 | Combined screw of double-screw extruder and process for producing low-odor polyolefin |
| CN116178844A (en) * | 2023-03-24 | 2023-05-30 | 湖南恒屹新材料有限公司 | PPE/PP alloy material for compatibilization and toughening and preparation method thereof |
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