What is PBT? Polybutylene terephthalate (PBT) is a thermoplastic polyester and one of the five engineering plastics. PBT has excellent comprehensive performance, is one of the toughest engineering plastics, and has high dimensional stability, good chemical corrosion resistance, excellent electrical insulation, good mechanical properties and elasticity, low water absorption and so on. What is PBT-LGF? As one of the engineering plastics, most of the PBT needs to be modified to meet the corresponding requirements in the practical application field. PBT modification is mainly divided into: flame retardant PBT, glass fiber reinforced flame retardant PBT, glass fiber reinforced PBT. The modified PBT material is mainly used in the field of lighting (such as LED lamp shell), electronic and electrical fields (such as relay shell and spinner, socket, optical fiber connector, etc.) and automotive manufacturing (such as junction box, ignition system parts, external door handles, etc.). The difference between Long glass fiber & Short glass fiber Long glass fibers range in length from 6 to 25mm, while staple fibers are usually less than 6mm, or even between 0.2 and 0.6mm. Long glass fiber has more excellent performance in machanical properties. It is more suitable for large products and structural parts. It has 1-3 times higher (toughness) than short fiber, and the tensile strength (strength and rigidity) is increased by 0.5-1 times. What is the application of PBT-LGF? In the lighting industry, most of the lamp shell is used for enhanced flame retardant PBT material, whose performance requirements are easy to process and form, good mechanical properties, high and low temperature cycle resistance, flame retardant level UL94 3.0mm or 1.5mm V0, high temperature resistance, yellowing resistance effect is good. Its appearance requires transparent color or porcelain white shading, smooth surface, no floating fiber. В области автомобилестроения модифицированный PBT в основном используется в таких элементах, как кронштейн автомобильных стеклоочистителей, кольцо освещения автомобильных фар, коробка передач автомобильной коробки передач, стойка лобового стекла, корпус двигателя и так далее. TDS только для справки Литье под давлением О нас Композитный пластик Xiamen LFT Co., Ltd. является фирменной компанией, специализирующейся на LFT и LFRT. Серия длинного стекловолокна (LGF) и серия длинного углеродного волокна (LCF). Термопласт LFT компании можно использовать для литья под давлением и экструзии LFT-G, а также для литья LFT-D. Он может быть изготовлен в соответствии с требованиями заказчика: 5 ~ 25 мм в длину. Термопласты, армированные длинным волокном непрерывной инфильтрации компании, прошли сертификацию системы ISO9001 и 16949, а продукция получила множество национальных товарных знаков и патентов. Приходите и свяжитесь с нами

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) улучшить термическую стабильность ПБТ и уменьшить количество низкомолекулярных продуктов, образующихся в результате термического разложения во время обработки; Приложение ПБТ Широко используется в машиностроении, электронной и электрической, автомобильной промышл...

Класс продукта: Общий класс Спецификация волокна: 20%-60% Характеристика продукта: высокая прочность, низкая деформация Применение продукта: электронные приборы, детали машин и т. д.

PBT .Девственный пластиковый сырой Материал Заполнение длинного стекловолокна

pbt первичное пластмассовое сырье наполнение длинного стекловолокна

pbt первичное пластмассовое сырье наполнение длинного стекловолокна

литье под давлением pbt переработанный материал pbt соединение материал.

Гранулы смолы ку ку ку заводской смолы цены углеродного волокна и nbsp;уже хорошо и nbsp;характеристики, такие как и nbsp;легкий и сильнее.

Девы ПБТ ПБТ гранулы смолы lgf40 впрыски прессформы полимера для электронных приборов, который производит в себя завод.Производства очень дешевые и качество очень высокое.

ПБТ является одним из наиболее динамично развивающихся инженерных пластиков. улучшенный водонепроницаемый ПБТ ПБТ lgf40 гранулы пеллеты

пластмассы промышленности продуктов ПБТ lgf40 гранулы PBT материал полимер

длинные стеклянные волокна полибутилен терефталат ПБТ пластмасса материал lgf40