oxide black quotes factory



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.

...
oxide black quotes factory2025-08-14 04:52
2178
{随机栏目} 2025-08-14 04:18 2861

    • Latest articles

  • 1. Brother CS7000X This versatile model is excellent for beginners and experienced sewers alike. It features 70 built-in stitches, a large LCD display, and an automatic needle threader. It also includes a wide table, perfect for larger projects, making it a fantastic choice for quilting.


  • In conclusion, a double needle sewing machine is a great investment for anyone who values efficiency and precision in their sewing projects. With so many options available for sale, you're sure to find the perfect machine for your needs and budget. Just remember to do your research, set a budget, and take proper care of your machine to ensure it lasts for years to come. Happy sewing!

  • Automatic button sewing machines are not limited to traditional clothing applications. They can also be utilized in creating custom crafts, upholstery work, and even in the production of accessories. With the ability to handle various button sizes and styles, from basic plastic to decorative metal buttons, these machines can cater to a wide range of projects.


  • Overall, hi-speed lockstitch machines are a must-have tool for any serious seamstress or tailor. Their combination of speed, strength, and precision make them perfect for a wide range of sewing projects, from simple alterations to complex garment construction. With a hi-speed lockstitch machine in your sewing room, you can take your sewing skills to the next level and create beautiful, professional-looking garments with ease.

  • - Select the Right Stitch Settings Before you start, adjust your sewing machine’s settings to match the fabric type and intended use of the stitching. Experiment with different widths and lengths to achieve the desired effect.


  • Overall, our special sewing machine has become an indispensable tool in our workshop. Its advanced technology, precision stitching capabilities, and user-friendly design have made it a favorite among our team of designers and creators. Whether we are working on a simple hem or a complex couture garment, this machine is always up to the task, delivering professional results with every stitch.
  • Maintenance is also an important consideration when investing in a long arm upholstery sewing machine. Regular cleaning and oiling of the machine's moving parts will help ensure smooth operation and prolong its lifespan. Additionally, it is recommended to have the machine serviced by a professional technician annually to address any potential issues and keep it running smoothly.

  • 3. Cost-Effectiveness Investing in gunny bag sewing machines can yield substantial cost savings in the long run. The durability of the stitched bags reduces losses due to spillage or contamination, while the speed of operation allows businesses to scale up production without a significant increase in labor costs.


  • Another advantage of using a durable sewing machine belt is that it helps reduce the risk of slippage during operation. A worn-out or inferior quality belt can slip or break during sewing, causing disruptions and potentially damaging the machine. By investing in a high-quality sewing machine belt, you can ensure that your machine runs smoothly and efficiently with minimal interruptions.


    leather sewing machine belts

    leather

  • To get the most out of sewing machine quilt patterns, mastering key techniques is vital. Here are a few essential tips


  • Ultimate Guide to Heavy Duty Sewing Machines

  • Stitching automatic machines have revolutionized the textile industry by streamlining the sewing process and increasing efficiency. These machines are equipped with advanced technology that allows them to automatically stitch fabric together with precision and speed. With the rise of fast fashion and the need for quick turnarounds, stitching automatic machines have become essential tools for manufacturers looking to stay competitive in the market.

  • Conclusion

  • Conclusion


  • 4. Sew Slowly Heavy canvas can be challenging to maneuver. Taking your time will help you control the fabric and prevent mistakes.


  • Key Features of Beginner Heavy Duty Sewing Machines


  • One of the most significant advantages of using jute bag closer machines is the increased efficiency in the packaging process. Manual sealing can be time-consuming and prone to errors, which can lead to increased labor costs and material waste. Automated jute bag closer machines can handle high volumes of bags in a fraction of the time, enabling businesses to meet growing demand without compromising on quality. This efficiency not only improves productivity but also contributes to a more streamlined supply chain.


    jute bag closer machine

    jute

  • The Pricing Spectrum


  • 1. Brother PQ1500SL This machine is often praised for its speed and capability to sew thick materials. It has a powerful motor, a wide table for large projects, and the ability to handle multiple layers of fabric without any hassle.


  • When we want to buy a sewing machine, always will face a problem, you should choose a shuttle hook sewing machine, or choose a rotary hook sewing machine. I list this two types of sewing machine characteristics you will know how to choose.

  • In addition to their efficiency and sustainability, automatic template sewing machines have also democratized sewing. Hobbyists and aspiring fashion designers who may not have had the technical skills to operate complex sewing machines can now create professional-quality garments with relative ease. Many models come equipped with user-friendly interfaces and tutorial modes that guide users through the sewing process, making it accessible to a broader audience.


  • In conclusion, a seaming machine is a versatile and essential tool for anyone working with textiles. Whether you are a professional seamstress in a garment factory or a hobbyist working on DIY projects at home, a seaming machine can help you achieve professional-looking results in less time. With the right machine and a bit of practice, you can create beautiful and durable seams on a wide range of fabrics and projects.

  • What to Consider When Purchasing an Industrial Overlocker


  • In the world of carpet manufacturing and retail, efficiency and quality are paramount. One of the essential tools for ensuring a high-quality finish and durability in carpet production is the carpet overlocking machine. As the demand for professional-looking carpets continues to rise, the need for advanced overlocking machines has become increasingly significant. This article will explore what carpet overlocking machines are, their benefits, and what to consider when looking for one for sale.


  • 2. Perfect for Quilting Quilters will find the double needle walking foot machine invaluable. The even feed mechanism helps maintain fabric alignment while quilting, helping to avoid puckering and ensuring that every layer is stitched evenly. This machine allows quilters to experiment with various patterns while achieving flawless results.


    double needle walking foot sewing machine for sale

    double
  • Overall, sewing machine specials can be a great way to save money on a new machine. Whether you're looking for a basic model to get started or a high-end machine with all the bells and whistles, there are deals to be found if you know where to look. So keep an eye out for specials and sales events, and you could find the perfect sewing machine at a price you can afford.

  • Creativity and Personalization


  • 5. Maintenance With simpler mechanics, single stitch leather sewing machines tend to require less maintenance than their more complicated counterparts. This ease of maintenance allows users to focus on their craft rather than troubleshooting mechanical issues.


  • 4. Jeans/Denim Needles These needles have a thicker shaft and a strong, sharp point, making them perfect for piercing through heavy fabrics like denim.


  • In addition to its durable construction, the HD3000 sewing machine also offers a wide range of stitching options. With 18 built-in stitches, including basic stitches like straight stitch and zigzag stitch, as well as decorative stitches like scallop and satin stitch, you have plenty of options to choose from. The machine also has a one-step buttonhole feature, making it easy to create perfect buttonholes every time.

  • Selecting the appropriate sewing machine is crucial for making car seat covers effectively. Unlike standard fabric, upholstery materials such as canvas, leather, or heavy-duty polyester require machines that possess enough power and durability to handle thick fabrics. Look for a machine that offers


  • Size and Portability

  • An auto oil sewing machine, as the name suggests, is designed with an automatic oiling system. This feature not only ensures optimal performance but also prolongs the lifespan of the machine by lubricating its moving parts consistently and efficiently. Unlike traditional sewing machines that require manual oiling, which can be time-consuming and often overlooked, the auto oil system operates seamlessly, reducing the risk of wear and tear and potential breakdowns.

  • 4. Ease of Use Modern zig zag industrial sewing machines come equipped with user-friendly features such as automatic tension adjustment, programmable stitch length and width, and easy threading mechanisms. These features can simplify the sewing process, allowing users of all skill levels to produce professional-quality results.


  • Moreover, automatic machine sewing allows for greater design complexity. With the incorporation of computerized technology, designers can create intricate patterns and unique styles that were previously challenging to achieve with manual sewing. These machines can execute elaborate designs with precision, allowing for a wide range of creative possibilities. As a result, fashion brands can experiment with diverse fabrics, textures, and designs, pushing the boundaries of traditional garment construction.


    automatic machine sewing

    automatic

  • At the heart of the chain stitch machine is its ability to produce a stitch that resembles a chain. This is achieved through a looping mechanism involving one or two needles and at least one looper. The needle threads penetrate the fabric, while the looper captures the thread to create the characteristic loop. This innovative approach allows for greater elasticity in the seam, making it ideal for materials that require flexibility, such as stretch fabrics.


  • In terms of cost, overlockers can vary significantly in price, depending on their features and brand. For beginners, entry-level models are available that offer essential functions without the bells and whistles of higher-end counterparts. These budget-friendly options are perfect for those looking to dip their toes into the world of advanced sewing without making a significant financial commitment. On the other hand, more advanced users may opt for professional machines that offer a wider range of capabilities, including differential feed for improved control over fabric feeding.


  • Sewing machines have come a long way since their invention, and among the myriad types, the Zig Zag Dressmaker sewing machine stands out as a versatile and essential tool for both novice and experienced seamstresses. This machine not only enhances creativity but also brings functionality to the forefront, making it a go-to choice for anyone delving into the world of sewing.


  • Overall, there are plenty of options available for those looking for an inexpensive leather sewing machine. By considering the features that are most important to you, and shopping around for the best deals, you can find a quality machine that fits your budget. Whether you're a beginner looking to get started in leather sewing, or a more experienced sewer in need of a budget-friendly option, there are plenty of choices out there to suit your needs.