ما هو الـ PBT؟ البولي بيوتيلين تيريفثاليت (PBT) هو بوليستر لدن بالحرارة وواحد من خمسة أنواع من اللدائن الهندسية. تتميز PBT بأداء شامل ممتاز ، وهي واحدة من أصعب اللدائن الهندسية ، ولديها ثبات عالي الأبعاد ، ومقاومة جيدة للتآكل الكيميائي ، وعزل كهربائي ممتاز ، وخصائص ميكانيكية جيدة ومرونة ، وامتصاص منخفض للماء ، وما إلى ذلك. ما هو PBT-LGF؟ كواحد من اللدائن الهندسية ، يحتاج معظم PBT إلى تعديل لتلبية المتطلبات المقابلة في مجال التطبيق العملي. ينقسم تعديل PBT بشكل أساسي إلى: مثبطات اللهب PBT ، مثبطات اللهب المقوى بالألياف الزجاجية PBT ، الألياف الزجاجية المقواة PBT. تُستخدم مادة PBT المعدلة بشكل أساسي في مجال الإضاءة (مثل غلاف مصباح LED) ، والمجالات الإلكترونية والكهربائية (مثل غلاف المرحل والدوران ، والمقبس ، وموصل الألياف الضوئية ، وما إلى ذلك) وتصنيع السيارات (مثل صندوق التوصيل ، أجزاء نظام الإشعال ، مقابض الأبواب الخارجية ، إلخ). الفرق بين الألياف الزجاجية الطويلة والألياف الزجاجية القصيرة يتراوح طول الألياف الزجاجية الطويلة من 6 إلى 25 مم ، بينما عادة ما تكون الألياف الأساسية أقل من 6 مم ، أو حتى بين 0.2 مم و 0.6 مم. 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. In the field of automobile manufacturing, the modified PBT is mainly used in such as automobile wiper bracket, automobile headlight lighting ring, automobile transmission gear box, windshield pillar, motor shell and so on. TDS for reference only Injection molding About us Xiamen LFT composite plastic Co., Ltd. is a brand-name company that focuses on LFT&LFRT. Long Glass Fiber Series (LGF) & Long Carbon fiber Series (LCF). The company's thermoplastic LFT can be used for LFT-G injection molding and extrusion, and can also be used for LFT-D molding. It can be produced according to customer requirements: 5~25mm in length. The conpany's long-fiber continuous infiltration reinforced thermoplastics have passed ISO9001&16949 system certification, and the products have obtained lots of national trademarks and patents. Come and contact us

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) تحسين الاستقرار الحراري لـ PBT وتقليل المنتجات الجزيئية الصغيرة الناتجة عن التدهور الحراري أثناء المعالجة ؛ تطبيق PBT تستخدم على نطاق واسع في الآلات والأجهزة الإلكترونية والكهربائية وصناعة السيارات والأجهزة المنزلية وغيرها من المجالات. معلومات ذات صله لون طول عين...

درجة المنتج: الدرجة العامة مواصفات الألياف: 20٪ -60٪ ميزة المنتج: صلابة عالية ، منخفضة انفتال تطبيق المنتج: الأجهزة الإلكترونية ، قطع غيار الآلات إلخ.

PBT .عذراء البلاستيك الخام المواد ملء الألياف الزجاجية الطويلة

pbt خام بلاستيكي بكر ملء الألياف الزجاجية الطويلة

pbt خام بلاستيكي بكر ملء الألياف الزجاجية الطويلة

قولبة بالحقن pbt إعادة تدوير المواد pbt مركب مادة

نظرة خاطفة الكريات نظرة خاطفة الراتنج مصنع خاطفة الراتنج سعر طويلة من ألياف الكربون على  ؛   ؛   ؛ الميزات, مثل هذا  ؛   ؛ خفيفة الوزن وأقوى.

العذراء pbt الكريات pbt الراتنج lgf40 البوليمر حقن الأجهزة الإلكترونية التي واحد مصنوع في مصنع بنفسي.إنتاج رخيص جدا وجودة عالية جدا.

PBT هي واحدة من الأسرع نموا في هندسة البلاستيك. متفوقة للماء pbt حبيبات lgf40 PBT الكريات

صناعة البلاستيك المنتج pbt lgf40 حبيبات pbt المواد البوليمر

طويلة الألياف الزجاجية بيوتيلين تيريفثاليت pbt المواد البلاستيكية lgf40