heat stabilizers, introduced species and their uses

PVC plastic profiles recipes, heat stabilizers, introduced species and their uses
PVC plastic profiles design principles formulation Formulation PVC plastic profiles mainly composed of PVC resin and additives, wherein the additives according to the functions are one pack stabilizer  divided into: a heat stabilizer,
Lubrication agents, processing modifier, impact modifiers, fillers, anti-aging agents, coloring agents. Before the design PVC formulation
Should first understand the PVC resin and various additives performance.
Raw materials and additives
PVC resin
Below the surface rule, solid, table tennis was like, easy to absorb plasticizers, loose type currently used more.
PVC can be divided into ordinary level (toxic PVC) and sanitary '(non-toxic PVC). Sanitary requirements of vinyl chloride (VC) content is low
At lOXl0-6, can be used for food and medicine. Synthesis process is different, PVC can be divided into suspension PVC and emulsion PVC. Root
According to the national standard GB/T5761-93 "general purpose PVC resin suspension test" provisions into suspension PVC
PVC-SGl to PVC-SG8Jk resins, wherein the smaller the number, the greater the degree of polymerization, the greater the molecular weight, the higher the strength, but
Melt flow more difficult, the processing is more difficult. Specific choice when doing soft products, the general use of PVC-SGl, PVC-SG2
PVC-SG3-type, who need to add a lot of plasticizer. Such as polyvinyl chloride resin film for SG-2, 50 to 80 parts of plasticizer
Agent. The machining of hard products, generally without adding a plasticizer or a very small amount, so use PVC-SG4, VC-SG5, PVC-SG6PVC-SG7, PVC-SG8 type. Such as rigid PVC pipes with SG-4 resin, plastic window profiles using the SG-5 resin, rigid transparent
Next sink using SG-6 resin, rigid foam profile with SG-7, SG-8 resin. And Emulsion PVC paste mainly used for artificial leather,
Wallpaper and floor covering and dipped plastic products. Some manufacturers factory PVC resin PVC resin by plastic lubricant  polymerization degree (degree of polymerization unit chain
The number of times the molecular weight of PEG degree of polymerization of the polymer molecular weight equal to) classification, such as Shandong Qilu Petrochemical Plant production PVC
Resin, manufactured products for the SK-700; SK-800; SK-1000; SK-1100; SK-1200 and so on. SG-5 resin, which corresponds to
The polymerization degree of 1000-1100. Physical and chemical properties of PVC resin see Part IV.
PVC powder as a white powder, density of 1.35-1.45g/cm3, the densities at 0.4-0.5g /
cm3. Depending on the size of the plasticizer content can be as soft and hard wares, usually 0-5 parts plasticizer content of 5 to 25 parts of hardware products for the semi-hard products, more than 25 parts of soft products. PVC is a non-crystalline, polar polymers, softening temperature and melting temperature is higher, pure PVC generally required
Energy. Moreover, PVC compound containing  Acrylic processing aid chlorine group, and when the temperature reaches 120 ~ C, the pure PVC began unraveling HCl to cause PVC heat
Degradation. Therefore, in the processing to add various additives modification and processing of PVC impact modifier, so that it can be processed into
Useful products.
PVC resin is mainly used to produce various types of film (such as daily printing film, industrial packaging film, agricultural greenhouse film and shrink film