Mainly through the surface to absorb water to complete dry or bonded. The raw solid starch in the binder gels on the paste line to absorb moisture. The bonding time is from a few seconds to a minute or so. The moisture is gradually absorbed by the surrounding air and paper fibers. This traditional type of adhesive is typically used in corrugated board production lines to provide a strong bond immediately.
In order to achieve a satisfactory bonding effect, a slightly viscous suspoemulsion containing pregelatinized starch is added to the starch and water emulsion. The suspoemulsion can suspend the raw starch in water and prevent it from being precipitated; the concentration is increased to be carried by the sizing roller and a suitable thickness of the paste is formed on the roller; the viscosity is adjusted so that the paper fiber is properly wetted and initially adhered; There is a lot of water around the starch molecules so that the starch can expand to the maximum when heated.
Complete gelation; caustic soda is added to adjust and control the gelatinization temperature of the starch until it is at a minimum.
In order to achieve a satisfactory bonding effect, borax must be added to make the raw starch absorb all the water that can be absorbed when heated; to make the starch gelatinized to produce appropriate viscosity and toughness; to act as a buffer to prevent caustic soda A portion of the raw starch is inflated below the minimum gelatinization temperature.
Hss Straight Shank Twist Drill Bit for metal
Drill Bits For Metal-Hss Straight Shank Twist Drill Bit for metal
Product Name Cobalt Metal Drill Bit
Material HSS M35Shank Straight Shank
Application Ideal For Drilling Soft Metal, Hard Metal And Stainless Steel
Surface Finish: Black Oxide (Bright, Amber Color, Titanium Black&Gold Black Bright are Available)
Package:10/5 Pcs in PVC Pouch, Plastic Box, Individually in Skin Card, Double Blister, Clamshell
Shank Type: straight Shank (Hex Shank, Trl-flats Shank, Double R Hex Shank, Reduced ShankThreaded Hex Shank, Taper Shank are Available)
Features
1 High-speed steel tools are good for most general purpose applicatons, ofering a combination of hardness and toughness for wear resistance
2. Universal 118"point shape for drilling a wide selection of materials
4. Ground nutes provide tast chip removal to maximize accuracy and emeny along the ul working
3 .Precision ground point nutes body clearance and dnll diameter for the ultimate in accuracy and performane of the bit
Hss Straight Shank Twist Drill Bit,Jobber Length Twist Drill Bit,Right Drill Bit For Metal Drilling,Straight Shank Fully Ground Right Drill
Changzhou Bomitools Co.,Ltd. , https://www.bomitools.com