国产精品午夜福利,免费精品久1免费9,97免费国产视频,国产福利社视频,久久久人人人婷婷婷,re久久久,在线超碰人人妻,日韩欧美在线观看91,大香蕉官网在线观看

Laminating machine used adhesive: Borax

Borax is also divided into powdery and granular, fine grained borax best. According to the two levels of intensity of borax. 10 moles of borax with 10 water molecules, called 10 stage water borax. 5 moles of borax with 5 water molecules, called 5 stage water borax. The higher the concentration of 5 mol of borax. 5 moles of borax 0.35 kg is equivalent to 0.454 kg of 10 mol of borax. Using the wrong two borax the same amount of words, the consequences are serious. If the borax added raw starch and water emulsion, and then the mixture is heated, starch to absorb the water expanded quickly, and become more viscous than not add borax at.

Add the amount of borax must be limited, otherwise, will affect the starch swelling, gel paste will become brittle, a powder dry.

Laminating machine used glue: adhesive binder

Different water resistant adhesive and ordinary adhesive is usually more less raw starch, caustic soda, containing no or little containing borax, of course, waterproof agent, water resistant adhesive added a certain amount of. A lot of waterproof agent can be used, are water soluble resin. After this kind of resin and formaldehyde chemical crosslinking, become insoluble binder in water, has a certain water resistance in line heating will paste.

Most water-resistant adhesive of life have a certain limit. Some are with the passage of time gradually thickening, even also cannot be avoided in the case of agitation. Some mechanical operation performance is good, but water resistance degree is reduced greatly.