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. 자동차 제조 분야에서 수정된 PBT는 주로 자동차 와이퍼 브래킷, 자동차 전조등 조명 링, 자동차 변속기 기어 박스, 앞 유리 기둥, 모터 쉘 등에 사용됩니다. 참조용 TDS 사출 성형 회사 소개 Xiamen LFT composite plastic Co., Ltd.는 LFT&LFRT에 주력하는 브랜드 회사입니다. 긴 유리 섬유 시리즈(LGF) 및 긴 탄소 섬유 시리즈(LCF). 이 회사의 열가소성 LFT는 LFT-G 사출 성형 및 압출에 사용할 수 있으며 LFT-D 성형에도 사용할 수 있습니다. 그것은 고객 요구에 따라 생성될 수 있습니다: 길이 5~25mm. 회사의 장섬유 연속 침투 강화 열가소성 플라스틱은 ISO9001&16949 시스템 인증을 통과했으며 제품은 많은 국가 상표 및 특허를 획득했습니다. 와서 저희에게 연락

PBT-LGF 폴리부탄디올 테레프탈레이트(PBT)는 높은 결정화도, 신속한 프로토타이핑, 내후성, 낮은 마찰 계수, 높은 열 변형 온도, 우수한 전기적 특성, 우수한 기계적 특성, 내피로성과 같은 우수한 종합 특성을 가지며 초음파 용접이 가능합니다. 그러나 노치 충격 강도가 낮고 성형 수축률이 크며 가수 분해 저항이 좋지 않고 유리 섬유 보강 후 할로겐화 탄화수소에 의해 침식되기 쉽습니다. 우수한 종합 성능으로 PBT는 전자 및 전기 제품, 자동차 산업, 기계, 기기 및 가전 제품 및 기타 분야에서 널리 사용됩니다. 일반적인 문제 및 해결 방법 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. Related information Colour Length Sample Package Port of Loading Shiping time Natural 5mm~12mm Available 25kg/bag Xiamen Port 7

제품 등급: 일반 등급 섬유 사양: 20%-60% 제품특징 : 고인성, 저휨 제품적용 : 전자제품, 기계부품 등

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와 펠렛 와 수지 공장을 엿 수지 가격 긴 탄소 섬유  좋 기능，그런  라고 강하다.

virgin pbt 펠렛 pbt 수지 lgf40 폴리머 사출 성형을 위한 전자 기구는 어느 하나에 해결할 공장도 있습니다.생산는 것은 매우 저렴하고 품질이 매우 높습니다.

PBT 은 하나의 가장 빠르게 성장하는 엔지니어링 플라스틱입니다. 우수한 방수 pbt 과립 lgf40PBT 펠렛

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