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Polyvinyl alcohol PVA

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Polyvinyl alcohol PVA

PVA is a water-soluble, biodegradable synthetic polymer known for its excellent film-forming properties, emulsifying ability, and high tensile strength. It is widely used in packaging, textile, paper, adhesive, and construction industries. Unlike most thermoplastics, PVA can be dissolved in water depending on its degree of hydrolysis and polymerization, making it an environmentally friendly choice for various applications.

PVA (Polyvinyl Alcohol) – Product Specifications

PVA is a water-soluble, biodegradable synthetic polymer known for its excellent film-forming properties, emulsifying ability, and high tensile strength. It is widely used in packaging, textile, paper, adhesive, and construction industries. Unlike most thermoplastics, PVA can be dissolved in water depending on its degree of hydrolysis and polymerization, making it an environmentally friendly choice for various applications.

Key Parameters:

  • Degree of Hydrolysis: 85% – 99% (partially or fully hydrolyzed)

  • Viscosity (4% solution at 20°C): 2 – 60 mPa·s (grade dependent)

  • pH Value (4% solution): 5.0 – 7.0

  • Volatile Content: ≤ 5%

  • Ash Content: ≤ 1%

  • Tensile Strength (film): 30 – 80 MPa (depending on grade and humidity)

  • Elongation at Break (film): 150 – 400%

  • Solubility in Water: Soluble in hot or cold water based on hydrolysis degree

  • Melting Point: 180 – 230°C (decomposes before melting in some grades)

  • Processing Methods: Film casting, extrusion (with plasticizers), solution coating

  • Typical Applications: Water-soluble packaging films (laundry pods, agrochemical bags), textile sizing agents, paper coatings, adhesives, emulsifiers, and biodegradable injection molded products


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PVC Compound

1. Cost Efficiency 2. Ease of Installation 3. Durability and Strength 4. Resistance to Weatherization

PP

PP is a lightweight, semi-crystalline thermoplastic known for its excellent chemical resistance, high melting point, and good fatigue resistance. It is widely used in packaging, automotive parts, household goods, and industrial applications. PP is easy to process and recyclable, making it a popular choice for both injection molding and extrusion.

HDPE

HDPE is a strong, durable, and lightweight thermoplastic known for its high tensile strength, excellent chemical resistance, and low moisture absorption. It has a linear structure with minimal branching, giving it higher density and greater crystallinity compared to LDPE and LLDPE. HDPE is widely used in rigid packaging, piping, and industrial applications where strength and durability are required.

GPPS

GPPS is a transparent, rigid, and brittle amorphous thermoplastic known for its excellent optical clarity, good dimensional stability, and ease of processing. It has low water absorption and good electrical insulation properties. Unlike HIPS, GPPS does not contain rubber impact modifiers, so it offers high stiffness and gloss but lower impact resistance. GPPS is widely used in applications requiring transparency and rigidity, such as disposable tableware, packaging, and consumer goods.

TPU

TPU is a high-performance elastomer combining the strength of plastic with the flexibility of rubber. It offers excellent abrasion resistance, oil and grease resistance, and good low-temperature flexibility. TPU is widely used in injection molding, extrusion, and blow molding applications across automotive, industrial, and consumer goods sectors.

PC

PC is a high-performance amorphous engineering thermoplastic known for its exceptional impact strength, high transparency, and good heat resistance. It offers excellent dimensional stability and electrical insulation properties. PC is widely used in applications requiring optical clarity and mechanical toughness, such as automotive components, electronic housings, medical devices, and protective equipment.

PLA

Polylactic acid (PLA) is a new type of biodegradable material made from starch raw materials proposed from renewable plant resources such as corn. Starch raw materials are fermented to produce lactic acid, which is then converted into polylactic acid through chemical synthesis. It has good biodegradability and can be completely degraded by microorganisms in nature after use, ultimately generating carbon dioxide and water without polluting the environment. This is very beneficial for protecting the environment and is recognized as an environmentally friendly material.

POM

POM is a high-performance engineering thermoplastic known for its excellent dimensional stability, high stiffness, low friction, and good wear resistance. It is commonly used as a metal replacement in precision parts that require high mechanical strength and low moisture absorption. POM performs well in applications involving moving components and exposure to fuels or solvents.

PBS

1. Natural fibrous by-product of Powder Straw Material Resin processing, a renewable plant-based material 2. Fine, compact fibers ideal for molding, delivering high strength and deformation resistance 3. Fully biodegradable and compostable, no plastic pollution 4. Free of plastic, heavy metals and fluorescent agents, food-safe 5. Abundant supply, low-carbon, and a sustainable agricultural waste reuse solution

ABS

ABS is a tough, rigid, and impact-resistant engineering thermoplastic with good mechanical strength, excellent surface finish, and high dimensional stability. It is a terpolymer that combines the rigidity of styrene, the chemical resistance of acrylonitrile, and the toughness of butadiene rubber. ABS is widely used in automotive, electronics, consumer goods, and industrial applications where a balance of strength, aesthetics, and processability is required.

EPS

EPS is a rigid, lightweight cellular foam material produced from polystyrene beads that expand when exposed to steam. It offers excellent thermal insulation, high shock absorption, and low moisture uptake. EPS is widely used in construction, protective packaging, and disposable food containers due to its durability, weight savings, and cost-effectiveness. It is fully recyclable and can be reprocessed into new polystyrene products.

PBAT

PBAT is a thermoplastic biodegradable plastic, which is a copolymer of butylene adipate and butylene terephthalate. It has the characteristics of PBA and PBT, and has good ductility and elongation at break, as well as good heat resistance and impact performance. In addition, it also has excellent biodegradability and is one of the best degradable materials for biodegradable plastics research and market application.

PBT

PBT is a semi-crystalline engineering thermoplastic known for its excellent mechanical strength, high heat resistance, good electrical insulation properties, and fast crystallization rate. It offers low moisture absorption and good dimensional stability, making it an ideal material for precision components in automotive, electrical, and electronic applications. PBT is often reinforced with glass fiber to further enhance strength and stiffness.

LDPE

LDPE is a soft, flexible, and lightweight thermoplastic known for its excellent clarity, good chemical resistance, and ease of processing. It has a high degree of branching, which gives it lower density and less crystallinity compared to HDPE and LLDPE. LDPE is widely used in film extrusion, coating, and molding applications where flexibility and transparency are important.

HIPS

HIPS is a modified version of GPPS (general purpose polystyrene) with added rubber (polybutadiene) to significantly improve impact resistance while maintaining good processability and dimensional stability. It offers a balanced combination of mechanical strength, stiffness, and ease of fabrication. HIPS is widely used in applications requiring moderate strength and good surface finish for printing or painting.

EVA

EVA is a flexible, rubber-like thermoplastic copolymer of ethylene and vinyl acetate. It offers excellent toughness, low-temperature flexibility, good transparency (in certain grades), and strong adhesion properties. As the vinyl acetate (VA) content increases, EVA becomes softer, more flexible, and more elastic, with improved clarity and lower melting point. EVA is widely used in foam, film, adhesive, and extrusion coating applications where flexibility, impact resistance, and transparency are valued.

PA Pa6 Pa66

PA6 is a widely used engineering thermoplastic known for its good mechanical strength, high impact resistance, excellent wear resistance, and good chemical stability. It absorbs moisture more readily than PA66, which can affect dimensional stability but also improves toughness. PA6 is easy to process and suitable for a variety of injection molding and extrusion applications.

PET

PET is a strong, lightweight thermoplastic known for its excellent clarity, high tensile strength, good chemical resistance, and recyclability. It is widely used in packaging, fiber, and engineering applications. PET is one of the most common plastics for food-contact applications due to its safety and barrier properties against moisture and oxygen.

PLA

Polylactic acid (PLA) is a new type of biodegradable material made from starch raw materials proposed from renewable plant resources such as corn. Starch raw materials are fermented to produce lactic acid, which is then converted into polylactic acid through chemical synthesis. It has good biodegradability and can be completely degraded by microorganisms in nature after use, ultimately generating carbon dioxide and water without polluting the environment. This is very beneficial for protecting the environment and is recognized as an environmentally friendly material.

LLDPE

LLDPE is a flexible, durable thermoplastic known for its high tensile strength, excellent puncture resistance, and good environmental stress crack resistance. Compared to LDPE, LLDPE offers better impact strength and elongation properties while maintaining good flexibility. It is widely used in film extrusion applications and is compatible with most conventional polyethylene processing equipment.
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