
Tailoring Our Medical Injection Molding Services to Meet ... - all american inje
Author:gly Date: 2024-10-15
In recent years, PBT plastic, as the “rising star” of engineering plastics, has gained widespread use in the automotive, electronics, home construction, and medical fields due to its excellent performance.
Polybutylene terephthalate (abbreviated as PBT), belongs to the polyester family. It is formed by the polycondensation of 1,4-butylene glycol and terephthalic acid (PTA) or dimethyl terephthalate (DMT), and is processed through a blending procedure to produce a milky white, semi-transparent to opaque, crystalline thermoplastic polyester resin.Alongside PET, it is commonly referred to as a thermoplastic polyester or saturated polyester.
PBT material it uses, such as adding 15% glass fiber PBT material used as energy-saving lamp base and shell, PBT/PC alloy as the sole of ice skates, others such as relay shells, sockets, switches, tuner shells, food processing blades, vacuum cleaner components, fans, hair dryer shells, coffee utensils and so on.
As a big manufacturing country, China has many excellent companies and manufacturers that are fruitful in the field of injection moulding.
The rheological curve of PBT is relatively steep, the temperature range of the moulding is relatively narrow, the temperature requirement during the moulding process is relatively strict, the temperature will be too high to overflow, the temperature will be too low to block the nozzle.
In 1970, they introduced it to the market as a 30% glass fiber reinforced plastic under the name X-917, which was later renamed CELANEX.
PBT in electronic products in the second largest use as a cooling fan, cooling fan is placed in the machine for a long time rotating to help dissipate heat, the physical requirements of the plastic is heat-resistant, flame retardant, insulating and mechanical strength, PBT is usually used to add 30% glass fiber modified as a cooling fan outside the frame and fan blades.
Connector is a bridge between the signals, is to transmit electronic signals and power connections indispensable components, PBT balanced physical properties and prices are in line with the needs of the connector.
The products should have uniform wall thickness to prevent internal stresses caused by uneven cooling or shrinkage, which can lead to warping and deformation.
Additionally, PBT is commonly blended with other polymers, like pc/pbt or abs/pbt, resulting in plastic alloys tailored for specific application needs.
The physical requirements of the bobbin winding, including insulation, heat resistance, resistance to welding, mobility, strength, etc., the applicable materials are phenolic resin, PBT, PA6, PET.
To delve deeper into the potential of innovative materials, follow along as we further research and uncover the prominence of PBT material in the realm of injection molding.
At the same time, cooling in the mold is crucial. The mold’s cooling channel design must be optimal to minimize product warping. Heat dissipation should be rapid and uniform.
Subsequently, renowned global manufacturers such as Germany’s BASF and Bayer, America’s GE and Ticona, Japan’s Toray and Mitsubishi Chemical, Taiwan’s Shin Kong Synthetic Fibers, Chang Chun Plastics, and Nan Ya Plastics, among others, entered into production, totaling over thirty producers worldwide.
Furthermore, PBT is resilient to hot water, bases, acids, and oils. However, it’s vulnerable to corrosion by halogenated hydrocarbons and lacks in hydrolytic resistance.
Short and thick runners are preferred. The sprue diameter should be on the larger side; if too small, it results in significant pressure loss.
Half of the PBT consumed in the automobile industry is formed with PC as PBT/PC alloy, which can be used as automobile bumper. In addition, PBT can also be used for window motor shells, locomotive motor parts, automotive transmission gear box, radiator window, body panels, wheel covers, door and window parts.
In conclusion, polybutylene terephthalate (PBT) is a high-quality plastic material that makes its mark in injection moulding, and if you want to try to start a PBT injection molding project, it is especially important to choose a good injection moulding manufacturer.
At the same time, PBT molecules contain ester bonds, which will decompose under the action of strong acid, strong alkali and water vapour, which will easily cause performance defects and discolouration problems of PBT parts.
The third use of PBT is as a transformer, relay winding shaft, generally to PBT plus 30% glass fiber reinforced injection molding.
PBT usually add 30% glass fiber blended as a connector, PBT because of mechanical properties, solvent resistance, good forming and processing and low prices are widely used.
With the refinement of PBT’s polymerization techniques, molding PBT has become increasingly straightforward. In injection molding, PBT plastic displays these processing features:
Downtime treatment: PBT downtime within 30min, the temperature can be reduced to 200 ℃ when the shutdown. When producing again after a long shutdown, the material in the barrel should be emptied, and then add new material to carry out normal production.
PBT was originally developed by German scientist P. Schlack in 1942. Later, the American company Celanese (now Ticona) carried out industrial development and launched it under the brand name Celanex.
It’s essential to incorporate exhaust grooves or holes in the mold to prevent poor mold filling, prominent weld lines, and burn marks due to inadequate venting.
First,PBT boasts attributes like high toughness, thermal resistance, and fatigue resistance. It provides self-lubrication, a low coefficient of friction, and retains many of its physical characteristics even in humid settings, although it does exhibit higher volume resistivity and dielectric loss.
To address these challenges, PBT material often undergoes modification through the addition of specific ratios of glass fiber reinforcements or inorganic mineral fillers, enhancing its tensile and bending strengths, as well as its thermal deformation temperature.
The modification of PBT is mainly divided into: flame retardant PBT, glass fiber reinforced flame retardant PBT, glass fiber reinforced PBT, PBT co-mingled gold.
ACIS®, Autodesk Inventor®, CATIA® V5,Creo™ Parametric, IGES, Parasolid®, Pro/ENGINEER®,Siemens PLM Software’s NX™, SolidEdge®, SolidWorks®, STEP
In addition , FOWMOULD’s physical plant is equipped with professional injection moulding equipment to ensure the quality and precision of PBT products while ensuring that production is completed within the agreed deadlines.
Additionally, PBT products, along with PPE, PC, POM, and PA, are collectively referred to as the five major general-purpose engineering plastics.
It quickly crystallizes at cooler temperatures and is known for its favorable moldability, though it does suffer from low notch impact strength and a significant molding shrinkage rate.
FOWMOULD, located in Taizhou, Zhejiang Province, has 40 years of experience in mould injection moulding and a professional design and manufacturing team, which is able to provide customers with comprehensive one-stop PBT injection moulding services.
Use of mould releasing agent: Normally no mould releasing agent is used, if necessary, silicone mould releasing agent can be used.
In 1971, Eastman introduced glass-fiber reinforced and unreinforced products under the brand name Tenite (PTMT); that same year, GE also developed similar products, offering unreinforced, reinforced, and flame-retardant varieties.
FOWMOULD boasts 40 years of mold manufacturing experience, providing professional insights into optimizing PBT mold design.
As one of the engineering plastics, in the actual application field, most of the PBT need to be modified to meet the corresponding requirements.
Due to PBT’s properties, including heat resistance, weather resistance, chemical resistance, excellent electrical characteristics, low moisture absorption, and good gloss, it is widely used in electronics, automotive parts, machinery, household items, and more.
Finally, in order to avoid the problem of design leakage, FOWMOULD provides the service of signing NDA confidentiality agreement to maximise the protection of customer’s design.
FOMWMOULD’s manufacturing experts and production capabilities are at your disposal to create high-quality injection moulded PBT parts.
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