wholesale titanium dioxide is a precipitate



Pure PVB is non-toxic and harmless to human body. In addition, ethyl acetate or alcohol can be used as solvent, so PVB is widely used in printing ink of food containers and plastic packaging in European and American countries.

Storage safety properties

PVB can be stored for two years without affecting its quality as long as it is not in direct contact with water; PVB shall be stored in a dry and cool place and avoid direct sunlight. Heavy pressure shall be avoided during PVB storage.

Solubility

PVB is soluble in alcohol, ketone, ester and other solvents. The solubility of various solvents changes according to the functional group composition of PVB itself. Generally speaking, alcohol solvents are soluble, but methanol is more insoluble for those with high acetal groups; The higher the acetal group, the easier it is to dissolve in ketone solvents and ester solvents;

PVB is easily soluble in cellosolve solvents; PVB is only partially dissolved in aromatic solvents such as xylene and toluene; PVB is insoluble in hydrocarbon solvents.

Viscosity characteristics of PVB solution

The viscosity of PVB solution is greatly affected by the formula of solvent and the type of solvent; Generally speaking, if alcohol is used as solvent, the higher the molecular weight of alcohol, the higher the viscosity of PVB solution;

Aromatic solvents such as xylene and toluene and hydrocarbon solvents can be used as diluents to reduce the viscosity of PVB solution; The effect of PVB chemical composition on viscosity is summarized as follows: under the same solvent and the same content of each base, the higher the degree of polymerization, the higher the solution viscosity; Under the same solvent and the same degree of polymerization, the higher the acetal group or acetate group, the lower the solution viscosity.

Dissolution method of PVB

Where mixed solvents are used, the dissolution step is to first put aromatic solvents (such as xylene, toluene, etc.) or ester solvents (such as n-butyl acetate, ethyl acetate, etc.) into the mixing, slowly put PVB into the mixing, and then add alcohol solvents (such as n-butanol, ethanol, etc.) after PVB is dispersed and expanded,

At this time, the dissolution time can be shortened by heating; Using this dissolution method, the formation of lumpy PVB can be avoided (because the dissolution time will be several times after the formation of lumpy PVB), so the dissolution speed can be accelerated. Generally, the ratio of aromatic and alcohol solvents is 60 / 40 ~ 40 / 60 (weight ratio), and PVB solution with low viscosity can be prepared.

The solvent composition contains 2 ~ 3wt% water, which can improve the hydrogen bonding strength of alcohol solvents and help the solubility of PVB.

Processing properties

Although PVB resin is a thermoplastic, it has little processability before plasticizer is added. Once plasticizer is added, its processability is very easy.

The purpose of general coatings and adhesives is to change the resin characteristics by adding plasticizers to meet the application requirements, such as film softness, reducing the TG point of the resin, reducing the heat sealing temperature, maintaining low-temperature softness, etc.

Compatibility

PVB can be compatible with a variety of resins, such as phenolic resin, epoxy resin, alkyd resin and MELAMINE resin.

B-08sy, b-06sy and b-05sy with high acetal degree can be mixed with nitrocellulose in any proportion. PVB and alkyd resin are partially compatible. General PVB is compatible with low molecular weight epoxy resin, while high molecular weight epoxy resin needs PVB with high acetal degree to be compatible with each other.

...
wholesale titanium dioxide is a precipitate2025-08-14 08:41
2501

Titanium dioxide's journey into the food industry began with its classification as Generally Recognized As Safe (GRAS) by the US Food and Drug Administration (FDA). This status is granted after rigorous scientific evaluation, ensuring that the substance does not pose any significant health risks when used as intended. In Europe, the European Food Safety Authority (EFSA) also approves its use, but with specific guidelines on maximum levels.

...
wholesale titanium dioxide is a precipitate2025-08-14 08:05
2000

Several suppliers globally offer lithopone pigments, each with their own price lists based on their production processes, raw material sources, and business strategies. China, being a major producer, houses several renowned manufacturers like Zhejiang Huayi Chemical Co., Ltd., Zibo Dongfang Jincheng Chemical Co., Ltd., and Shanghai Kangle Chemical Co, and Shanghai Kangle Chemical Co, and Shanghai Kangle Chemical Co, and Shanghai Kangle Chemical Colithopone pigment pricelist supplier., Ltd. These companies not only provide a wide range of lithopone grades but also ensure consistent quality and competitive pricing.

...
wholesale titanium dioxide is a precipitate2025-08-14 08:04
1001
{随机栏目} 2025-08-14 08:41 1758

    • Latest articles

  • 2. Durable Construction Heavy-duty machines are built to last, often featuring a metal frame that provides stability and reduces vibrations during sewing. This sturdiness ensures more precise stitching, even at high speeds, making it easier for quilters to create intricate designs.


  • Plastic bag closer machines are indispensable assets in the modern manufacturing landscape. Their ability to enhance efficiency, ensure product quality, and adapt to changing market demands positions them as vital components for businesses looking to thrive in a competitive environment. As technology continues to advance, so too will the capabilities and functionalities of these machines, proving that they are not just a temporary solution but a cornerstone of efficient packaging processes for years to come.


  • Creativity and Personalization


  • Moreover, the packaging sector has experienced significant growth due to increased consumerism and global trade. The rise in demand for various goods has led to a heightened need for efficient packaging solutions. The PP bag stitching machine not only addresses this demand but also plays a crucial role in various industries, from agriculture to construction, demonstrating its versatility and importance.


  • Saddle stitch machines are vital equipment in the printing and binding industry. Known for their ability to produce high-quality booklets, magazines, and brochures, these machines have transformed the way printed materials are bound together. With the increasing demand for efficient and cost-effective binding solutions, many businesses are turning to saddle stitch machines. However, one of the most common queries among potential buyers is the price of these machines. In this article, we will explore the factors that influence the price of saddle stitch machines and what you can expect when investing in one.


  • At its core, an overlocker uses multiple threads—typically three to five—working in unison to create a secure stitch that finishes the edges of the fabric. The primary purpose of an overlocker is to prevent fraying, which is particularly important in fabrics that tend to unravel, such as knits and some woven materials. By enclosing the raw edges of the fabric, the overlocker effectively protects the integrity of the material and enhances the lifespan of the garment.


  • Regarding accessibility, many manufacturers and retailers offer long arm walking foot sewing machines for sale online. This availability means that you have the opportunity to read reviews, compare features, and look for promotions that could give you a better deal. Plus, numerous sewing communities often share insights and recommendations, helping you make an informed decision.


  • - Budget Heavy-duty machines come in a range of prices. Determine your budget before researching models to find one that offers the best value for your needs.


  • One of the key factors that can affect the price of an industrial zigzag sewing machine is the type of stitching it can perform. Zigzag stitching is versatile and can be used for a wide range of applications, such as creating decorative seams, attaching elastic, and sewing stretch fabrics. Machines that offer a variety of stitching options, including zigzag, straight stitch, and overlock, may be more expensive but provide greater versatility and functionality.

  • One of the key advantages of stitch machine embroidery designs is their versatility. These designs can be used to embellish a wide range of items, from clothing and accessories to home décor and gifts. Whether you're looking to personalize a pair of jeans with a unique design or add a touch of elegance to a table runner, stitch machine embroidery designs can bring your vision to life with ease.


  • 4. Ease of Use Modern double needle walking foot sewing machines offer a range of features that enhance usability, including adjustable stitch length, tension control, and multiple needle sizes. Many models are user-friendly, making them suitable for both beginners and advanced sewists.


  • In conclusion, sewing with heavy canvas offers endless possibilities for both functional and creative projects. With the right tools and techniques, anyone can learn to master this versatile fabric. Whether you’re crafting bags, outdoor gear, or home décor, the sturdy nature of heavy canvas makes it a fantastic choice for those looking to create lasting and practical items. So grab your sewing machine, some heavy canvas, and let your creativity flow—there’s a world of projects waiting to be stitched!


  • What is a Needle Feed Sewing Machine?


  • One of the key features of the HD3000 sewing machine is its heavy-duty construction. This machine is built to last, with a strong metal frame that can withstand the rigors of daily use. Whether you are sewing thick fabrics like denim or leather, or delicate fabrics like silk or chiffon, the HD3000 sewing machine can handle it all.

  • I wanted a simple, mechanical, but stronger-than-regular sewing machine. An affordable, yet sturdy model for my sewing projects. I don't need a giant sew-through-everything industrial in my sewing corner (and most probably you neither).

  • There are many criteria to consider when choosing a heavy duty sewing machine. We will start with the beginning and make it a lot easier for you.

  • Tips for Sewing Vinyl


  • The Importance of Overlock Machine Rates


  • A double needle leather sewing machine is a specialized sewing machine designed to sew leather using two needles simultaneously. This configuration allows for parallel stitching, which creates a more robust seam that can withstand the stresses and strains typically associated with leather items. Commonly used in the production of bags, shoes, belts, and other leather goods, this machine enables artisans to produce high-quality results quickly and efficiently.


  • Jute bag closer machines are specialized equipment designed to seal the openings of jute bags securely. These machines come in various configurations, from manual to fully automatic systems, catering to different production scales. The primary function of these machines is to ensure that jute bags are tightly sealed, preventing the contents from spilling or being contaminated during transport and storage. This is particularly important for industries such as food, agriculture, and textiles, where product integrity is paramount.


  • Selecting the perfect upholstery sewing table requires careful consideration. Here are some tips to guide your decision


  • When selecting a leather needle for faux leather, be sure to choose the appropriate size based on the weight and thickness of the material. For medium-weight faux leather, a size 14 or 16 leather needle should work well. If you're working with heavier faux leather, consider using a size 18 leather needle for best results
    sewing
    sewing machine needle for faux leather. It's always a good idea to have a few different sizes on hand to test and see which one works best for your specific project.

  • A long upholstery needle is typically characterized by its extended length and robust build. Unlike regular sewing needles, upholstery needles are designed specifically for working with thick fabrics, multiple layers, and padding materials often found in furniture upholstery. The length of these needles allows for better reach into deep seams and tough-to-reach areas. They also come with a tapered point, making it easier to penetrate heavier materials without causing damage.


  • 4. Robust Build Industrial sergers are built for heavy-duty use, often featuring metal components that withstand the rigors of daily operation in a factory. This durability translates to longer lifespans and reduced maintenance needs.


    industrial serger machines

    industrial
  • If you're unsure of where to start looking for a double needle sewing machine for sale, consider checking out online retailers, sewing machine shops, or specialty sewing stores. Many retailers offer a wide selection of double needle sewing machines at various price points, so you're sure to find one that fits your needs and budget.

  • Additionally, there are different types of lock stitch needles designed for varied applications. For instance, needles with a rounded tip are ideal for sewing knit fabrics, as they slide between the fibers rather than piercing them, reducing the risk of snagging. Conversely, a sharp needle is perfect for woven fabrics, as it can easily penetrate the tight weave, creating clean and precise stitches. Specialty needles, such as twin needles for parallel stitching or quilting needles for multi-layered quilts, also contribute to the versatility of sewing projects.


  • 2. Adjustable Stitching Patterns Many baffle sewing machines offer adjustable stitch patterns that allow seamsters to customize the design according to the product's requirements. This flexibility is crucial for manufacturers aiming to create unique items that stand out in the marketplace.


    baffle sewing machine

    baffle
  • An industrial overlocker, also known as a serger, is a specialized sewing machine that is designed to create professionally finished seams on garments and other fabric projects. These machines are equipped with multiple threads and loopers that work together to trim, stitch, and overcast raw edges all in one quick and easy step. This results in strong, clean, and durable seams that are perfect for everything from clothing and home décor to bags and accessories.

  • Conclusion


  • Quilting has long been a cherished craft that allows individuals to express creativity through fabric and thread. With the advent of technology, traditional quilting has evolved, giving rise to innovative tools such as multi-needle quilting machines. These machines have revolutionized the quilting process, making it faster, more efficient, and accessible for quilters of all skill levels.


  • The Long Arm Sail Sewing Machine with Puller A Game Changer for Marine Canvas Projects


  • In terms of user experience, modern automatic button sewing machines are engineered to be user-friendly. Most models feature intuitive controls and detailed user guides, making them accessible even to those new to sewing. Many machines now include digital displays that provide step-by-step instructions and allow for easy adjustments to the settings. This ease of use encourages creativity, enabling users to experiment with different styles and techniques without fear of making mistakes.


  • Another factor that influences the price is the brand. Well-known brands with a reputation for quality and reliability, such as Brother, Singer, and Janome, may command higher prices. These brands often provide better customer support and warranties, which can be beneficial in the long run. Lesser-known or generic brands may offer more competitive pricing but could come with trade-offs in terms of quality and service.


  • One of the significant advantages of commercial zig zag sewing machines is their versatility. Sewists can easily switch between different stitch types—such as straight, zig zag, and various decorative stitches—to suit a wide range of projects. This flexibility is particularly beneficial in commercial settings where diverse tasks may be performed on a daily basis, such as tailoring, garment construction, or crafting intricate designs.


  • If you are a beginner or hobbyist, you may not need all the bells and whistles that come with a more expensive machine. In this case, you could opt for a more budget-friendly option that still offers a reliable performance for your sewing projects. On the other hand, if you are a professional seamstress or tailor, investing in a higher-end model with advanced features may be worth the extra cost.