Factors Affecting Carboxyl End Groups in Textile-Grade Polyester Chips
An important influencing factor in textile-grade polyester chips is the carboxyl end group (-COOH). These groups form mainly during the esterification and polycondensation stages. Incomplete esterification reactions can leave carboxyl groups in the final product. Side reactions such as thermal degradation, thermo-oxidative degradation, and etherification in the polycondensation reaction will also produce carboxyl end groups. […]
Application of Polyester Fiber in Non-woven Fabrics
Polyester, scientifically known as polyethylene terephthalate (PET). It is a thermoplastic polymer widely utilized in various applications. It is a pivotal material in the production of non-woven fabrics through the spun-bond method. In China, the output accounts for about 6% of the total output of spun-bond non-woven fabrics. 1. Molecular Structure of PET PET molecules […]
Enhancing Packaging Efficiency with Durable Puncture-Resistant Aluminum Coating Films
In recent years, driven by economic growth, there has been an increasing demand for high-quality packaging for various goods. Irregularly shaped and sharp-edged items, such as those containing bones or fish bones, often encounter damage during the vacuum packaging process due to the stretching of aluminum layers in conventional aluminum-coated composite films. This necessitates the […]
Understanding the Differences Between DTY, FDY, and POY
When it comes to synthetic fibers like polyester, there are three main types to know about DTY, FDY, and POY. 1. DTY DTY for Draw Textured Yarn. It is made by intertwining single fibers through a process involving compressed air. It results in long strands with periodic network points. These fibers often have some elasticity […]
Difference Between PET and PBT Plastics
Polyethylene terephthalate (PET) and polybutylene terephthalate (PBT) are two types of aromatic polyester plastics. PET has a highly symmetrical molecular structure, which gives it good crystal orientation capabilities. As a result, it has excellent film-forming and molding properties.The molecular chain structure of PBT is similar to that of PET, and most of its properties are […]
Application of luminescent pigments in plastics
The main component of luminescent pigments is aluminate. It is a new type of long afterglow luminescent material. Compared with traditional ZnS luminescent materials, their afterglow time after short-term illumination is more than ten times longer. Additionally, they have excellent lightfastness and durability. It is non-toxic and non-radioactive. No toxic chemicals are introduced or produced […]
Understanding Flame Retardancy: Oxygen Index vs. UL94 Ratings
The Oxygen Index (OI) refers to the minimum concentration of oxygen needed for a material to sustain flame combustion in a mixture of oxygen and nitrogen gases under specific conditions. It is expressed as a percentage of oxygen volume. 1. What is the Oxygen Index (LOI)? The Oxygen Index indicates the oxygen concentration required for […]
Barium sulfate flame retardant powder
Barium sulfate flame retardant, known as barium sulfate FR. It is a white powder with small particle size and high hydrophobicity. It is a phosphorus-containing organoaluminum salt flame retardant. It is widely used in engineering plastics like PET, PBT, nylon (including glass fiber reinforced), thin adhesives, flexible epoxy laminates, and TPE (TPEE, TPU, and PEBA). […]
Understand high oxygen resistance BOPET film and its production method
This article introduces a new technology for producing high oxygen barrier BOPET films. The film consists of a BOPET base film with a PVA coating on one side. The crystallinity of the PVA coating is 60% to 80%, and the orientation degree is 10% to 15%. This production method adds a coating step between the […]
A Simple Guide to Weft Yarn Sizing for Color Woven Fabrics
The article introduces a new method for treating weft yarn in color-woven fabrics. It involves three steps: dyeing the yarn, applying a liquid sizing agent, and drying it. Let’s break it down: Step 1: Dyeing the Yarn First, we dye the yarn in the usual way. Then, we add a softening agent and dye the […]
