manual leather stitcher

The single needle stitch, often hailed as one of the fundamental techniques in sewing and embroidery, epitomizes precision and craftsmanship. Rooted in centuries of tradition, this method has transcended time, finding relevance in both contemporary fashion and classic artisanal workmanship. While sewing might seem like a simple task to some, the single needle stitch embodies a level of detail and finesse that can elevate any fabric creation.

The Brother ST371HD is another highly rated option that shines in durability and ease of use. This machine is specifically designed for heavier fabrics and comes with 37 built-in stitches, including 1-step auto-size buttonholes. It features a metal needle plate, which is essential for sewing thicker materials, and an adjustable presser foot pressure that allows you to tackle different fabric thicknesses effortlessly. Users love its lightweight design, making it easy to transport to sewing classes or workshops.

A heavy-duty sewing machine is a specialized sewing machine designed for handling heavy fabrics, thick layers, and tough sewing tasks. It is commonly used in professional sewing environments, such as industrial settings, or for heavy-duty home sewing projects. Here are some key features and information about heavy-duty sewing machines:

Jumbo bags, also known as flexible intermediate bulk containers (FIBCs), are robust bags designed to hold large quantities of materials, typically ranging from 500 kg to 2000 kg. Their construction often includes durable woven polypropylene fabric that provides excellent strength and resilience. However, the effectiveness of these bags largely depends on how well they are sealed, which is where the lock stitch technique comes into play.

Recently, Yanagisawa et al. reported that the transdermal exposure (mimicking skin-barrier dysfunction or defect) of NC/Nga mice to TiO₂ NPs (15, 50, or 100 nm), in combination with allergen, aggravated atopic dermatitis-like lesions through a T-helper type 2 (Th2) dominant immune response. The study also indicated that TiO₂ NPs can play a role in the initiation and/or progression of skin diseases, since histamine was released, even in the absence of allergen.

EU ban on titanium dioxide

④ Ink industry: titanium dioxide is also an indispensable white pigment in advanced ink. The ink containing titanium dioxide is durable and does not change color, has good surface wettability and is easy to disperse. The titanium dioxide used in the ink industry includes rutile and anatase.

It is opaque and glossy, and provides bright whiteness with blue undertones.

Below 10% substitution, 1 kg of TiO2 should be replaced by 1 kg of Lithopone 30%.  

Variations of titanium dioxide are added to enhance the whiteness of paint, plastics, and paper products, though these variations differ from the food-grade ones for things we eat (1Trusted Source, 2Trusted Source).

4. Refractive index: 1.70~2.25

At present, the equipment and manufacturing process of domestic manufacturers of polyvinyl butyral are constantly getting closer to those abroad. For example, the wonderful use of polyvinyl butyral (PVB) has occurred in the printing industry and ceramic industry. Therefore, the domestic application of polyvinyl butyral (PVB) has an obvious upward trend in recent years.

For example, in the glass industry, it is because polyvinyl butyral (PVB) has good low-temperature impact strength, windability, light transmittance, light resistance, weather resistance, sound insulation, UV insulation and other properties, so that once the laminated glass is sealed together, the glass sandwich (i.e. laminated material) will appear as a whole and look like ordinary glass. For example, in the porcelain industry, polyvinyl butyral is made into a film and used for printing paper film of ceramic (or enamel) products. First, it reduces the original glue small paper Decal process, reduces the production cycle and production cost, and second, it makes its ceramic (or enamel) patterns bright in color and smooth in texture.

With the rapid development of science and technology in recent years, more and more industries have found the characteristics of polyvinyl butyral (PVB): high strength, high toughness, fatigue resistance, corrosion resistance and so on. Compared with traditional materials, polyvinyl butyral (PVB) is more and more widely used because of its larger development space and wider application fields!

Application field of polyvinyl butyral -- safety glass

The membrane made of polyvinyl butyral (PVB) is a special product used to manufacture safety glass and bulletproof glass. Safety glass is a special glass made of a layer of PVB diaphragm sandwiched between two layers of ordinary glass. It has good low-temperature impact strength, windability, light transmittance, light resistance, weather resistance, sound insulation, ultraviolet insulation and other properties. When subjected to strong external impact, PVB diaphragm can absorb impact energy, so that the glass will not break or prevent debris from hurting people. Moreover, the safety glass added with PVB diaphragm has the characteristics of high transparency, water resistance and aging resistance, and can be used in the environment of - 60 ℃. In addition, it can also be used as transparent material to replace plexiglass.

Application field of polyvinyl butyral -- ceramic film flower paper 

Jinan Yuxing Chemical Co., Ltd. Affiliated to China National Chemical New Materials Co., Ltd., it is a tertiary company under China National Chemical Corporation, the largest comprehensive chemical manufacturer in China. It is also one of the most modern manufacturers of sulfuric acid titanium dioxide manufacturers in the Asia-Pacific region. This TiO2 factory has more than 50 years of experience in the development and manufacture of titanium dioxide, and the “Shengsheng” brand titanium dioxide is well-known at home and abroad.

While IARC listed titanium dioxide as “possibly carcinogenic to humans,” they also add that “there is inadequate evidence in humans for the carcinogenicity of titanium dioxide.” Of the four human studies that they reviewed, only one showed a potential risk for occupational workers inhaling titanium dioxide particles and lung cancer, while the other three showed no risk for cancer at all. And it’s key to note that IARC did not assess the effects of titanium dioxide found in foods.

The so-called “barrier effect” makes it possible to achieve good anti-corrosion protection in primers.