As a polymer or prepolymer of plastic substrate, resin plays an important role in the fields of plastic products, coating products, and handicraft manufacturing. Therefore, resin is generally used as a processing raw material to participate in the production of these products. Therefore, in the process of incoming material inspection, resin quality inspection becomes a necessary step. However, there are many types of resins, and the testing standards are not relatively complete. Therefore, we are often confused about resin testing items. Today we will introduce the knowledge of resin testing by analogy. First of all, although there are many types of resins and the testing standards are complex, there are always some common testing items that can be used to evaluate the quality of resins. Such as apparent density, haze, yellowness, whiteness, swelling ratio, water content, acid value, melting point, hardness, impact strength, tensile properties, etc. are all very common testing indicators. If we want to test the production parameters of the resin, we can test the melt index, viscosity, mold shrinkage, melting temperature, etc. of the resin. In fact, there are many more inspection items for resin. Generally, the inspection items can be divided into four categories, mainly physical properties, combustion properties, thermal properties, applicability and other test items. The specific testing indicators are as follows: 1. Test items of resin physical properties: apparent density, light transmittance, haze, yellow index, whiteness, expansion ratio, water content, acidity hardness2. Resin combustion performance test items: vertical combustion, ignitio Phenibut Manufacturers n temperature, oxygen index, horizontal combustion, hot rod3, resin thermal performance test items: heat distortion temperature, thermal decomposition temperature, Vicat softening Point, high and low temperature impact, glass transition temperature, melting temperature4. Resin suitability testing items: electrical conductivity, corrosion resistance, low temperature resistance, hydraulic resistance, insulation performance, moisture permeability, Food and drug safety performanceTest items are the focus of resin testing, but it is a prerequisite to know the products suitable for resin testing. The following six categories are products suitable for resin testing. 1. Plastic raw material resin testing products: polyvinyl chloride, polypropylene, polystyrene, polyethylene, polytetrafluoroethylene, polycarbonate, ABS resin, polyamide, polyurethane, epoxy resin, Polyethylene terephthalate, polybutylene terephthalate, polyarylate, phenolic molding compound, copolyformaldehyde resin, polyamide 1010 resin, polycarbonate and other resins2 , Alkyd resin testing products: alkyd resin for industrial baking paint, alkyd resin for air-drying paint, alkyd resin for polyurethane paint, alkyd resin for nitro paint, alkyd resin for polyester paint, high-performance polyester Alkyd resin for paint, alkyd resin for industrial amino baking paint3. Epoxy resin and supporting testing products: ordinary bisphenol A epoxy resin, flame-retardant brominated epoxy resin, heat-resistant Type phenolic epoxy resin, epoxy reactive diluent, waterborne epoxy resin, cycloaliphatic amine curing Phenibut Suppliers agent, epoxy ester resin, epoxy resin curing agent4. Amino resin testing products: D Etherified amino resin, methyl etherified amino resin, urea-formaldehyde resin, mixed etherified amino resin, polyurethane curing agent, universal curing agent, quick-drying curing agent, trimer curing agent, moisture curing (prepolymer) curing Agent, low free TDI polyurethane curing agent5. Acrylic resin testing products: thermoplastic acrylic resin, thermosetting acrylic resin, acrylic resin for wood paint, solvent-based acrylic pressure-sensitive adhesive, woodware, rattan paint Thermoplastic acrylic resin, acrylic resin for solvent-based exterior wall coatings, hydroxy acrylic resin6. Saturated polyester resin testing products: alkyd resins for automotive paints and general industrial baking paints, light curing resins and their monomers , Oligomer epoxy acrylate, urethane acrylate, oligomer amino acrylate, monomer (hexafunctional monomer), monomer (trifunctional monomer), monomer (difunctional monomer), Monomer (monofunctional monomer)After understanding resin testing products and resin testing items, it is natural to talk about resin testing standards. There are many and complicated resin testing standards. Below we just extracted some common resin testing standards for your reference:GB/T13657-1992 Bisphenol A epoxy resinGB/T 12007.1-1989 Epoxy resin Color determination method Gardner colorimetric methodGB/T 12007.2-1989 Epoxy resin sodium ion determination methodGB/T 12007.3-1989 Epoxy resin total chlorine content determination method GB/T 12007.4-1989 Epoxy resin viscosit Phenibut Suppliers y determination methodGB/T 12007.5-1989 Epoxy resin density determination method, pycnometer GB/T 12007.6-1989 Determination of the softening point of epoxy resinGB/T 12007.7-1989 Determination of the gel time of epoxy resinGB/T 2567-2008 Resin casting General rules of test methods for mechanical properties of resin bodiesGB/T 2568 1995 Tensile test methods for resin casting bodiesGB/T 2569 1995 Compression test methods for resin casting bodiesGB/T 2570 1995 Resin casting body bending test methodGB/T 2571 1995 Resin casting body impact test methodGB/T 4726 1984 Resin casting body torsion Test methodGB 7193. 1-87 Unsaturated polyester resin viscosity determination methodGB 7193. 3-87 Unsaturated polyester resin solid content determination methodGB 7193. 6 87 Unsaturated polyester resin 25℃ gel time determination methodGB 2895 82 Unsaturated polyester resin acid value determinationQ/5S69 94 Determination of epoxy equivalent of epoxy compounds hydrogen bromide-glacial acetic acid non-aqueous titration methodDL/T1077-2007 styrene ion exchange resin organic leaching method (dynamic method)>FZ/T01080-2009 resin finishing fabric cross-linking degree test method dyeing methodGB/T11991-2008 ion exchange resin transformation expansion rate determination methodGB/T11992- 2008 Determination of Exchange Capacity of Chlorine Type Strongly Basic Anion Exchange ResinThe wide application of resins in modern industry determines that resin testing is bound to be a key consideration for resin products. Through the general understanding of resin testing products, resin testing items, and resin testing standards. We can have a basic understanding of resin testing. However, when it comes to specific types of resin products, we still need to analyze specific problems and find test items in a targeted manner to provide quality resin test reports.