Melt gear pumps, as the core equipment in the polymer production process, can convey a wide range of materials, and can be used for a variety of low-temperature, low-viscosity polymers to high-temperature, high-viscosity polymers under different pressure conditions. The materials conveyed by melt gear pumps are collectively known as melts, which are made up of polymer compounds as the base, together with other additives (auxiliaries).

According to the material application function classification, polymer materials are divided into general polymer materials, special polymer materials and functional polymer materials three categories.

General polymer materials refers to large-scale industrial production, has been widely used in construction, transportation, agriculture, electrical and electronic industry and other major areas of the national economy and people's daily life of polymer materials. This is divided into plastics, rubber, fibers, adhesives, coatings and other different types. Special polymer materials are mainly a class of polymer materials with excellent mechanical strength and heat resistance, such as polycarbonate, polyimide and other materials, has been widely used in engineering materials. Functional polymer materials are polymer compounds that have specific functional roles and can be used as functional materials, including functional separation membranes, conductive materials, medical polymer materials, liquid crystal polymer materials and so on.

Melt gear pumps can transport the melt with viscosity 1mPa.s~40000Pa.s, from water-like medium until rubber-like ultra-high viscosity medium, covering a variety of polymers.

I. General Plastics

1.PE

Low-density polyethylene (LDPE), high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE)

2.PP

Polypropylene (PP)

3.PS

Transparent polystyrene (hard rubber) GPPS (PS), high impact polystyrene (HIPS)

4.ABS

Acrylonitrile-butadiene-styrene copolymer (shell material) (ABS), acrylonitrile-styrene copolymer (AS)

2, engineering plastics

1.PA polyamide

Polycaprolactam / nylon 6 / single 6 (PA6), polyhexanediamine adipic anhydride / nylon 66 / double 6 (PA66), polyundecanamide / nylon 11 (PA11), polyundecanamide / nylon 12 (PA12)

2.POM Polyoxymethylene

Homopolymerization of formaldehyde / racemic steel (POM)

3.Saturated Polyester

Polyethylene terephthalate / polyester (PET), polybutylene terephthalate (PBT)

4.Polyphenylene ether

Polyphenylene ether resin (PPO)

III. Degradable Plastics

1. Polylactic Acid (PLA)

Polylactic acid (PLA), polyglycolic acid (PGA)

2. Polyalkylene alkanoate

Poly 3 hydroxybutyrate (PHB)

3. Polyaliphatic esters

Polybutylene glycol succinate (PBS), Polybutylene glycol succinate-terephthalate (PBAT), Polybutylene glycol succinate-adipate (PBSA)

4. Polycaprolactone

Poly-ε-caprolactone (PCL)

5. Carbon dioxide copolymer (APC)

Carbon dioxide - ethylene oxide copolymer (PPE), carbon dioxide - propylene oxide copolymer (PPC), carbon dioxide - epoxy butane copolymer (PPB)

IV. thermoplastic elastomers

1. styrene (TPS)

2. polyolefin elastomers

Polyethylene - olefin copolymer (POE), polypropylene - rubber dynamic vulcanization elastomer (TPV), polypropylene - rubber (TPO)

3. Chlorine-based

Polyvinyl chloride thermoplastic elastomer (PVC)

4. TPU thermoplastic polyurethane elastomers

5. Polyamide elastomers - TPA

6. TPEE elastomers - thermoplastic polyester elastomers - TPEE

V. General Plastics

1. Thermoset Plastics

Phenolic resins (PF electrician), epoxy resins (EP sludge), amino resins - urea-formaldehyde resins (UF)

2. Polyurethane (PU)

Elastomer-thermoplastic (TPU), Foam-soft (PU sponge)

3. polymethyl methacrylate (PMMA)

4. Cellulose plastic

5. Polyolefin

Polybutylene (PB)

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VI, rubber

1. natural rubber - NR

2. Synthetic rubber

Silicone (SI), nitrile rubber (NBR), fluoroelastomer (FPM), ethylene propylene diene trioxide (EPDM)

VII. Chemical Fiber

1. Polyamides

Polyamide 6 (PA6 nylon), polyamide 56 (PA56 Sylon)

2. Polyester

Polyethylene terephthalate (PET polyester)

3. Polyacrylonitrile

Polyacrylonitrile/Acrylic (PA)

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