1. Water-based coating glue is made by emulsification of acrylic or polyurethane resin through special emulsification equipment using water as a solvent.
Its biggest advantages are: variety, environmental protection, low price, many coatings are now made of water-soluble glue, such as: general water-soluble PA, water-soluble PU and film glue, oily waxy, scratching paste And other functional pulp. Water solubility is the direction of coating in the future due to its functionality, environmental friendliness and low price. Disadvantages are poor film formation, poor washing fastness, and PU can not be attached to hot air adhesive.
2. Oily coating glue:
The oil-based coating gel is prepared by dissolving acrylic acid or polyurethane in an oil solvent (toluene, DMF, methyl ethyl ketone, etc.) as a solvent.
The advantage is that the film forming property is good, the fastness is good, and the PU can be attached with hot air glue, which is a coating glue commonly used at present. The disadvantage is that due to the use of oily solvents, there is a lack of environmental protection, especially the current price increase of oil, resulting in soaring oil solvent prices. Most of the coating glue is too expensive, so it uses a relatively poor oil solvent, resulting in Environmental protection is not up to standard, and with the further improvement of environmental standards in various countries, the environmental protection requirements for coated rubber are getting higher and higher.
3. Hot melt pressure sensitive adhesive
The hot melt pressure sensitive adhesive is a kind of pressure sensitive adhesive, which is mainly prepared by mixing and heating a synthetic rubber, a resin and a rubber oil into a molten state and then coating it on a substrate such as a cotton paper, a cloth or a plastic film. The new adhesive tape is the biggest advantage of its low cost. The defect is that the viscosity is more affected by temperature.
Mainly used in various types of sealing, sealing, paper packaging, beverage bottle labels, sealing aluminum foil, flexible packaging and other packaging; environmentally friendly paper pallets, etc., to adapt to various materials. Sealing adhesive for various types of glazing, polishing, calendering, PP compounding, PET, PP transparent box, film, non-woven products bonding, cosmetic box packaging, food box packaging, cigarette box packaging, Tetra Pak packaging, etc. , assembly furniture edge banding, electronics industry, automotive interior sealing, lamp manufacturing, windshield assembly, etc.), non-woven sanitary napkins, diapers, diapers, insoles, disposable household items, coated composite label paper, labels Double-sided tape, sticky mouse board, sticky fly paper, wooden floor, carpet rubber, band-aid, medical breathable tape, color box packaging, carton packaging glue, adhesive tape and other difficult materials have strong adhesion Good thermal stability, no impurities, good operability; excellent weather resistance; aluminum foil sealing hot melt adhesive has unique water and waterproof properties. Hot melt pressure sensitive adhesive is a plasticity adhesive. Its physical state changes with temperature in a certain temperature range, and its chemical properties remain unchanged. It is non-toxic and tasteless and is an environmentally friendly chemical product.