Polyvinyl alcohol (PVA ) is a versatile and widely used polymer used in various industries such as construction, textile, paper and agriculture. Polyvinyl alcohol (PVA) is a heavy polymer that usually appears as a non-toxic, tasteless and non-polluting white or pale yellow flocculent, flaky, granular or powder. This polymer is a water-soluble resin with good chemical stability and has good adhesion, film-forming, insulation, oil resistance, and wear resistance. However, does PVA have the necessary performance or not? In this comprehensive guide, we examine the various aspects of purchasing polyvinyl alcohol, its properties and uses.
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Polyvinyl alcohol is a nonionic polymer with high molecular weight and soluble in water. It is known for its excellent solubility and adhesive properties. “” in its name indicates its average polymerization degree and hydrolysis level. It is in the normal molecular weight range of 20,000 to 30,000. Next, let’s check the features of PVA .
Due to its relatively low molecular weight, PVA exhibits excellent solubility in water. For this reason, it allows easy formation of uniform solutions. This feature is preferred for its safety in water-based solution applications.
Polyvinyl alcohol can be dissolved in some organic solvents such as methanol and ethanol. Because it offers more flexibility and application choices. This feature is useful in scenarios where water-based solutions may not be suitable.
During the drying process, PVA forms colloidal solutions rapidly and exhibits strong adhesive properties. This property makes it suitable for adhesive preparation and ensures safety in bonding applications.
An important safety feature of PVA is its ability to rapidly hydrolyze and degrade in the natural environment, which minimizes its risk to the ecosystem.
Polyvinyl alcohol is a special type of polyvinyl alcohol polymer with unique properties. PVA is a water-soluble synthetic polymer obtained by polymerization of vinyl acetate. PVA has properties that make it suitable for various industrial applications. Here are several uses of polyvinyl alcohol:
Polyvinyl alcohol is widely considered a key component in the formulation of adhesives. This adhesion is used on different levels and often in woodworking, paper gluing and packaging. PVA adhesives are recognized for their strong bonding capabilities, flexibility, and user-friendliness.
PVA is a surface measuring agent in the paper industry. It improves the surface properties of paper and increases its printing ability, smoothness and ink absorption. Papers coated with PVA are often used for high quality printing.
In the textile industry, PVA is a measuring agent for yarns. It gives strength and flexibility to the thread and facilitates the weaving process. In addition, the size of PVA increases the fabric’s resistance to wear.
Polyvinyl alcohol is used in the construction industry as an additive in cement and mortar formulations. It increases the adhesion of these materials to different surfaces and improves their strength and durability. PVA is often added to tile adhesives, joint compounds, and plaster.
PVA is a precursor in the production of polyvinyl acetate (PVAc) through emulsion polymerization. PVAc is used in the manufacture of various products including paints, coatings and adhesives.
PVA films derived from PVA are used in the packaging industry. These films are water soluble and are used to package water soluble detergent pods, agrochemicals and other products where controlled release or easy dissolution capability is required.
Water-soluble PVA films are used in the medical and pharmaceutical industries for applications such as dissolvable packaging for drugs and capsules. These films offer a convenient and safe method for administering specific types of medications.
PVA is used in the formulation of coatings and resins and contributes to their film-forming properties. This is especially important in the production of water-based paints, varnishes and other coating materials.
Polyvinyl alcohol can be used instead of a mold release agent in the production of some molded products. Its water-soluble nature makes it easy to release from the mold and facilitates the manufacturing process.
Polyvinyl alcohol is one of the most widely used types of synthetic resins. Due to its unique characteristics, it is used in various industries including textiles, adhesives, polymer films and paper products. This material is particularly important with its high adhesive strength, resistance to solvents and water solubility. In the following, we will examine the key points for purchasing this product to ensure that you choose the best quality and most affordable options.
Polyvinyl alcohol is used in textile, adhesive, paper, cosmetics, construction and many other industries. If you need more information to buy polyvinyl alcohol, contact our experts at Aref Shimi.
Polyvinyl alcohol is used in various laboratories and industries. The supply of this material is in powder form and has unique characteristics. When buying polyvinyl alcohol, pay attention to the quality and purity of the product and the price. When shopping for polyvinyl alcohol, consider the following points to ensure you choose the right product for your needs.
Characteristics (structure and formula): white powder
Formula: (C₂H₄O)ₓ soluble in water (vinyl polymer soluble in water)
Density: 1.19 g/cm³
Boiling temperature: 200 degrees Celsius
Solvent: water
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Other features:
Thermal stability: melting point and thermal decomposition temperature are close (about 180 degrees Celsius or higher).
If you're up for the challenge of making slime from scratch, or if commercial Clear PVA Glue feels too generic for your creative experiments. This post will guide you in choosing the PVA powder and achieving a one-of-a-kind clear slime texture.
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Table of content
Making slime is a chemical reaction process. However, we must first know the physical properties of various materials to make slime of better quality.
We can see these parameters on the PVA packaging bag:
PVA glue manufacturers will not publish these data, as they are confidential. Kinda sounds like me.
We are mainly concerned about Hydrolysis % and Viscosity Mpa.s, which determine the slime's thickness, viscosity (stick add-ins), and transparency.
Volatile % and Ash %. We just need to remember that the smaller their values, the better. The value of Volatile % is generally 5, and the value of Ash % is generally 0.7
Conclusion in one sentence: Choose around 88% hydrolysis PVA. Such as PVA, PVA.
The above picture shows a series of PVA hydrolysis %. We can find that the hydrolysis % is roughly divided into 88% and 99%.
88% hydrolysis PVA is easily soluble in water and has good transparency.
So, how about 99% hydrolysis？
Theoretically, slime made from 99% hydrolysis PVA is clearer than that of slime made from 88% hydrolysis PVA.
99% hydrolysis PVA is more difficult to dissolve in water and requires processing temperature.This post is only a beginner's guide and does not detail the use of 99% hydrolysis PVA.
Conclusion in one sentence: Choose large numbers of Viscosity PVA, such as PVA.
The picture above shows the stickiness of PVA, which reflects the ability to catch Add-ins, such as glitter, foam balls, crunch bombs, and other materials. Also, it will "catch" your hand and make you feel sticky.
Hover the point, find the PVA item you want
If you have tried PVA and PVA, you may find they have similar transparency, but the slime made by PVA is thicker and stickier.
Maybe you found some patterns.
Typical format: PVA-XYCC
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