As a trusted supplier of Lithopone B301, we understand the importance of consistent quality and reliable supply. Our manufacturing facilities are equipped with state-of-the-art technology to ensure that our product meets the highest standards of purity and performance Our manufacturing facilities are equipped with state-of-the-art technology to ensure that our product meets the highest standards of purity and performance
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.
- Moreover, the auto oil system contributes to improved stitch quality
Types of Sewing Machines for Leather Jackets
3. Ease of Use Many models come with user-friendly features such as automatic stitch settings, built-in thread cutters, and adjustable walking feet, making sewing simpler and more efficient even for beginners.
Beyond clothing, hi-speed lockstitch machines are also utilized in industries such as upholstery, where durable seams are essential for furniture and other fabric-covered items. Additionally, the automotive industry employs these machines for manufacturing seat covers and interior fabrics, where strength and precision are paramount.
Recommended Heavy Duty Sewing Machines for Vinyl
The lock stitch formation occurs in three main steps
Conclusion
The Evolution and Impact of Automotive Sewing Machines
- One of the most significant advantages of using an industrial sewing machine in auto upholstery is speed. These machines can sew at rates much faster than conventional models, significantly reducing production time and increasing productivity. Their durability is another plus point, as they are built to endure the rigors of daily use in a workshop environment.
- One of the key advantages of single needle stitching is its versatility. This technique can be used on a wide range of fabrics, from lightweight silks to heavy denims
single needle stitch. It can also be adapted to create different types of seams, such as flat-felled seams, French seams, and topstitched seams. This versatility makes single needle stitching a valuable skill for tailors and sewers who work with a variety of materials and styles.For both hobbyists and professional tailors, the Zig Zag Dressmaker Sewing Machine promises practicality. Its ability to transition between different stitch types seamlessly means that an entire project can be completed with just one machine, rather than having to switch between multiple devices.
Quilting is one area where the walking foot zigzag sewing machine truly shines. Traditional quilting often requires dealing with multiple layers, which can be challenging. The walking foot’s synchronized movement helps prevent the layers from shifting as you sew, resulting in beautifully constructed quilts without unwanted distortions. Additionally, the zigzag stitch can be used for decorative quilting, adding visual interest and character to your projects.
Learning to Use the Coverstitch Machine
- Heavy duty post bed sewing machines are a crucial tool in the manufacturing industry, particularly for working with heavy fabrics and materials. These specially designed machines are capable of handling thick layers of fabric, leather, canvas, and other tough materials with ease.
- When considering the price of an automatic sewing machine, it is essential to factor in the additional costs associated with maintenance and repairs. Some machines may require specialized training or servicing, which can add to the overall cost of ownership. It is crucial to choose a machine from a reputable manufacturer that offers reliable customer support and warranty coverage
automatic sewing machine price.Advantages of Using a Double Needle Sewing Machine
3. Robust Construction Given the heavy-duty materials often used in baffle construction, these machines are built to endure rigorous use over long periods. They often feature sturdy frames and powerful motors, ensuring consistent performance in high-volume production environments.
- In conclusion, the price of a sewing machine shuttle hook can vary depending on a variety of factors, including the brand, type, and quality of the hook. Investing in a high-quality shuttle hook made from durable materials can provide long-lasting performance and reliable stitching for your sewing projects. By researching different brands and comparing prices, you can find the best deal on a shuttle hook that meets your specific needs and budget. Remember to consider the overall value and quality of the shuttle hook when making your purchase to ensure that you get the best results from your sewing machine.
- In conclusion, self-threading sewing machines are a fantastic option for sewers of all skill levels. Whether you are a beginner looking to build your confidence or an experienced seamstress looking to streamline your sewing process, a self-threading machine can be a valuable addition to your sewing toolkit. With their convenience, accessibility, and time-saving features, self-threading sewing machines are a smart investment for anyone looking to enhance their sewing experience. Consider purchasing a self-threading sewing machine for sale today and enjoy a more efficient and enjoyable sewing experience.
1. Apparel Manufacturing
Lock stitch is a sewing technique that involves interlocking two threads—one from the needle and the other from the bobbin—to create a strong seam. This method is particularly advantageous for securing the seams of jumbo bags because it provides a tight, secure closure that can withstand significant tension and pressure. Unlike other stitching methods, lock stitch produces a consistent and uniform seam, reducing the likelihood of bag failure due to seam separation.
- Overall, single needle sewing is a valuable technique that offers precision, durability, and versatility. Whether you are a seasoned seamstress or a beginner, mastering the art of single needle sewing can enhance your sewing skills and take your projects to the next level. So next time you sit down at your sewing machine, consider giving single needle sewing a try and see the difference it can make in your stitching.
In the world of textiles and garment manufacturing, the sewing machine has long been a cornerstone of the industry. Among the various types of sewing machines, the needle feed sewing machine stands out for its ability to enhance efficiency, accuracy, and versatility in fabric handling. This article explores the features, benefits, and applications of needle feed sewing machines, highlighting their significance in modern textile production.
Furthermore, the double needles design allows for the incorporation of decorative elements in sewing. The ability to create intricate patterns with two thread lines simultaneously opens up avenues for creative expression in garment design. Designers can experiment with various thread colors and textures, producing visually appealing results that set their garments apart in a competitive market.
double needles chain stitch sewing machineOne of the standout features of cylinder bed sewing machines is their versatility. They are designed to handle a wide variety of sewing tasks, from basic seam construction to more complex embellishments and topstitching. This adaptability makes them ideal for both small-scale projects and large-scale production runs. Whether you are working on athletic wear, leather goods, or casual apparel, a cylinder bed sewing machine can meet your requirements efficiently.
One of the primary factors influencing the price is the brand reputation. Established brands known for their reliability, durability, and advanced technological features often command higher prices. Manufacturers like Juki, Brother, and Consew are among the leading names in the market, and their machines tend to be more expensive compared to lesser-known brands.
IV. Advanced Techniques and Tricks
When selecting a heavy-duty thread for your canvas sewing projects, consider the following factors