PBT-LGF Polybutanediol terephthalate (PBT) has excellent comprehensive properties, such as high crystallinity, rapid prototyping, weather resistance, low friction coefficient, high thermal deformation temperature, good electrical properties, excellent mechanical properties, fatigue resistance, can be ultrasonic welding. However, its notched impact strength is low, forming shrinkage rate is large, hydrolysis resistance is poor, easy to be eroded by halogenated hydrocarbons, after glass fiber reinforcement, because of the product longitudinal and horizontal shrinkage is inconsistent easy to warping products. With its excellent comprehensive performance, PBT is widely used in electronic and electrical appliances, automobile industry, machinery, instruments and household appliances and other fields. Common problem & Solvement Glass fiber reinforced PBT material warps easily Reasons: Warping is the result of uneven shrinkage of the material. The warping of the product can be caused by the orientation and crystallization of the components in the material, the improper technological conditions used in the injection molding, the wrong shape and position of the gate in the mold design, and the uneven thickness of the wall in the product design. The warping of PBT/GF composites is mainly due to the fact that the orientation of the glass fiber in the flow direction restricts the shrinkage of the resin, and the induced crystallization of PBT around the glass fiber strengthens this effect, making the longitudinal (flow direction) shrinkage of the product less than the transverse (perpendicular to the flow direction). This uneven shrinkage leads to the warping of PBT/GF composites. Solution: 1. Add minerals and use the shape symmetry of mineral fillers to reduce the anisotropy caused by the glass fiber orientation; 2. Add amorphous materials to reduce the crystallinity of PBT and reduce the uneven shrinkage caused by crystallization, such AS ASA or AS, but they have poor compatibility with PBT, so appropriate compatibilizers need to be added; 3. Adjust injection molding process, such as increasing mold temperature and increasing injection cycle appropriately. Glass fiber reinforced PBT surface floating fiber problem Reasons: The causes of floating fiber are more complex, in short, there are mainly the following aspects 1. The compatibility of PBT and glass fiber is very poor, resulting in the two can not effectively bond together; 2. The viscosity of PBT and glass fiber is very different, resulting in a tendency of separation between the two in the flow process. When the separation effect is greater than the adhesive force, the separation will occur, and the glass fiber will float to the outer layer and leak out; 3. The existence of shear force will not only lead to local viscosity differences, but also destroy the interface layer melt viscosity on the glass fiber surface, the smaller the interface layer is damaged, the smaller the bonding force on the glass fiber. When the viscosity is low to a certain degree, the glass fiber will get rid of the PBT resin matrix and gradually accumulate to the surface and expose. 4. Influence of mold temperature. Due to the low temperature of the mold surface, the glass fiber with light weight and fast condensation is frozen instantaneously. If it is not fully surrounded by melt in time, it will be exposed and form "floating fiber". Solution: 1) Add compatibilizers, dispersants and lubricants to improve the floating fiber problem. For example, the use of special surface treatment of glass fiber, or adding compatibilizers (such as: SOG, a well-flowing PBT modified compatibilizer) through the "bridge" effect, increase the adhesion of PBT and glass fiber. 2) Optimize the molding process to improve the floating fiber problem. Higher injection molding temperature and mold temperature, larger injection molding pressure and back pressure, faster injection molding speed, lower screw speed, can improve the floating fiber problem to a certain extent. The glass fiber reinforced PBT injection molding process is easy to produce more mold scale Reasons: The formation of mold scale is caused by the high content of small molecules or the poor thermal stability of materials. Compared with other materials, PBT is easy to generate mold scale due to its oligomer and small molecule residue rate usually in the range of 1%-3%. And after the introduction of glass fiber, more obvious. This will lead to the continuous processing process, the need to clean the mold regularly, resulting in low production efficiency. Solution: 1) Reduce the amount of small molecule additives (such as lubricant, coupling agent, etc.), try to choose polymer additives; 2) Improve the thermal stability of PBT and reduce the small molecular products produced by thermal degradation during processing; PBT Application Widely used in machinery, electronic and electrical, automotive industry and household appliances and other fields. Rel...

PPS information The resin matrix of thermoplastic composites involves general and special engineering plastics, and PPS is a typical representative of special engineering plastics, commonly known as "plastic gold". Performance advantages include the following aspects: excellent heat resistance, good mechanical properties, corrosion resistance, self-flame retardant up to UL94 V-0 level. Because PPS has the advantages of the above properties, and compared with other high performance thermoplastic engineering plastics and has the characteristics of easy processing, low cost, so it becomes an excellent resin matrix for manufacturing composite materials. PPS composite material PPS filling short glass fiber (SGF) composite material has the advantages of high strength, high heat resistance, flame retardant, easy processing, low cost, and has been applied in automotive, electronics, electrical, machinery, instruments, aviation, aerospace, military and other fields. PPS filling long glass fiber (LGF) composite material has the advantages of high toughness, low warpage, fatigue resistance, good product appearance and so on. It can be used in water heater impeller, pump shell, joint, valve, chemical pump impeller and shell, cooling water impeller and shell, household appliance parts and so on. What are the specific differences between short glass fiber (SGF) and long glass fiber (LGF) reinforced PPS composites? 1. Mechanical property analysis The reinforcement fiber added in the resin matrix can form a supporting skeleton, and the reinforcement fiber can effectively bear the external load when the composite is subjected to external force. At the same time, energy can be absorbed by fracture, deformation and other ways to improve the mechanical properties of resin. The tensile strength and bending strength of the composites are gradually increased by increasing the amount of glass fiber. The main reason is that when the glass fiber content increases, more glass fiber in the composite material can withstand the action of external force. Meanwhile, due to the increase in the number of glass fibers, the resin matrix between the glass fibers becomes thinner, which is more conducive to the construction of glass fiber reinforced frame. Therefore, with the increase of glass fiber content, more stress is transferred from resin to glass fiber under external load, which effectively improves the tensile and bending properties of composite materials. The tensile and bending properties of PPS/LGF composites are higher than those of PPS/SGF composites. When the glass fiber mass fraction is 30%, the tensile strength of PPS/SGF and PPS/LGF composites is 110MPa and 122MPa, respectively. The bending strength was 175MPa and 208MPa, respectively. The flexural elastic modulus were 8GPa and 9GPa, respectively. The tensile strength, bending strength and bending elastic modulus of PPS/LGF composites are increased by 11.0%, 18.9% and 11.3% compared with PPS/SGF composites, respectively. PPS/LGF composites have higher length retention rate of glass fiber. Under the condition of the same glass fiber content, the composites have stronger load resistance and better mechanical properties. When the glass fiber content is low, the impact strength of the composite decreases. The main reason is that the lower glass fiber content cannot form a good stress transfer network in the composite material, so that the glass fiber exists in the form of defects under the impact load of the composite material, resulting in the overall impact strength of the composite material is reduced. With the increase of the glass fiber content, the glass fiber in the composite can form an effective spatial network, and the reinforcement effect is greater than that of the glass fiber tip. Under the action of external load, the external load can be transferred to the reinforced fiber better, thus improving the overall performance of the composite. In the PPS/LGF system, the length of the glass fiber is longer and the spatial network is more dense. The reinforced glass fiber has greater bearing capacity and better impact strength. When the mass fraction of glass fiber is 30%, the impact strength of PPS/LGF is increased by 19.4% from 31kJ/m2 to 37kJ/m2, and the notch impact strength is increased by 54.5%(from 7.7kJ/m2 to 11.9kJ/m2). 2. Thermal properties analysis of PPS/SGF and PPS/LGF composites When the mass fraction of glass fiber is 30%, the thermal deformation temperature of PPS/SGF composite and PPS/LGF composite reaches 250℃ and 275℃, respectively. The thermal deformation temperature of PPS/LGF composite is 10% higher than that of PPS/SGF composite. The main reason is that the introduction of glass fiber makes the network skeleton of reinforced fiber formed inside the composite material, which greatly improves the heat resistance of the composite material. The size of glass fiber in PPS/LGF is longer, and the heat resistance improvement advantage is more obvious....

PP(polypropylene) as one of the general plastic materials, large output, low price, at the same time has excellent comprehensive performance, good chemical stability, better processing performance.

HPP is Homopolymer polypropylene

What is MXD6? Conventional aliphatic nylon is easy to process but has strong water absorption and low glass conversion temperature. Although all-aromatic nylon has solved the shortcomings of aliphatic products to a large extent, the processing difficulty has increased exponentially. After 1972, Toyo Textile and Mitsubishi Gas Chemical synthesized a new kind of semi-aromatic nylon MXD6, which not only overcame the disadvantages of aliphatic and all-aromatic resins to a large extent, but also had some advantages of all-aromatic resins. It is widely used in packaging materials with high gas barrier and engineering structural materials. In summary, MXD6 has the following advantages: High strength and elastic modulus; The high glass transition temperature is 237℃ for Tm and 85℃ for Tg. Low water absorption and moisture permeability; Fast crystallization speed, easy to form and manufacture; Excellent gas barrier performance. Why add Long Glass Fiber? Long glass fiber reinforced composite can solve your problems when other methods of reinforced plastics do not provide the performance you need or if you want to replace matal with plastic. Long Glass Fiber reinforced composites can cost-effectively reduce the cost of goods and effectively improve the mechanial properties of engineering internal skeleton network. Performance is preserved in a wide range of environments. MXD6 performance and application Compared with other materials, MXD6 has the advantages of high strength and elastic modulus, high glass transition temperature, low water absorption and moisture permeability, fast crystallization speed, convenient molding and manufacturing, excellent gas barrier properties, and can also be a good barrier to carbon dioxide and oxygen even under high humidity. In the end market, MXD6 is rarely used alone and is generally added to other polymers as a modified component. Materials containing MXD6 are mainly used in automotive and packaging fields. As an engineering plastic, MXD6 can replace the use of metal materials in the automotive industry, such as power tools, magnetic materials, automotive shell, chassis, girders, engine accessories, etc. We will offer you: 1) LFT & LFRT material technical parameters and leading edge design; 2) Mold front design and recommendations； 3)Provide technical support such as injection molding and extrusion molding. System Certification Quality Management System ISO9001/1949 Certification National Laboratory Accreditation Certificate Modified Plastics Innovation Enterprise Honorary Certificate Heavy metal REACH & ROHS testing

PEEK can also be called polyether ether ketone, as a kind of high-performance semi-crystalline plastic, this kind of plastic has excellent chemical resistance, large mechanical strength, good dimensional stability and a series of excellent properties, according to the performance of the PEEK material is divided into a variety of series of materials, the most common classification of PEEK material is peek original material, glass fiber or carbon fiber modification.

PPA (Polyphthalamide) is polyphthalamide.PPA is a kind of thermoplastic functional nylon with both semi-crystalline structure and non-crystalline structure. It is prepared by polycondensation of phthalic acid and phthalenediamine. It has excellent thermal, electrical, physical and chemical resistance and other comprehensive properties.

Product number: PPS-NA-LGF Fiber specification: 20%-60% Feature: 94-VO Flame retardant, high toughness, low warpage, fatigue resistance, good appearance of the product Application: Water heater impeller, pump shell, joint, valve, chemical pump impeller, shell, cooling water impeller, shell, home appliances parts

Product number: TPU-NA-LGF Fiber filling: 20%~60% Product feature: High toughness, High rigidity, Low water absorption, High dimensional stability, Chemical resistance, Good product appearance Product application: Car doors and windows, Safty toe, Mechanical parts, Pneumatic nail gun boxes, Professional power tools, Nuts and bolts, etc.

Product number: PA12-NA-LGF Fiber specification: 20%-60% Product feature: High strength, High toughness and durability Product application: Suitable for automotive, sports parts, solar energy, photovoltaic industry and other industries.

Product number: PA66-LGF Fiber specification: 20%~60% Product grade: General grade, Toughen resistance grade

Product grade: General grade, Toughen resistant grade Fiber specification: 20%-60% Product feature: High toughness, Low warpage, Light texture, etc Product application: Automotive, Electronic appliances, Sports equipment, Power tools, etc.