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  • Analysis of hot melt adhesive and hot melt pressure sensitiv
  • Editor:Hangzhou Dawei adhesive Co., Ltd.Date:2017-02-16 10:40 Click:
Hot melt adhesive and hot melt pressure sensitive adhesive has 40 years of history and is widely used in the manufacturing industry. Almost all industries, including packaging, bookbinding, carpentry, DIY, health, construction, automotive, electronics, footwear, fabrics, multilayer composite product combination, tapes and labels, use a lot of hot melt adhesive and hot melt pressure sensitive adhesive.
Hot melt adhesive is a solid content of 100% adhesive glue that can be in the molten state, proper flow and wetting. Hot melt cools back to room temperature in order to get practical adhesive strength. Hot melt adhesive properties of thermoplastic always remain in the application before and after.
Pressure sensitive adhesive is a kind of adhesive that has the surface viscosity at room temperature and has an opening time of infinite length. As a result, it can be attached to another object at any time. HMPSA is a kind of hot melt adhesive at room temperature, only a slight pressure can form effective adhesive ability. They are often used to make labels and tapes.
Hot melt adhesive can be divided into two categories: non prescription and prescription type hot melt adhesive.
Non prescription type hot melt adhesive in the synthesis after is a kind of special adhesive, do not need to use the thickening agent or other material modification. Non prescription type hot melt adhesive with typical polyester (PET), polyamide (PA), polyurethane (PU) and polyolefin (PO).
Non prescription type hot melt adhesive under high temperature conditions can provide a cohesive strength of "heat" will be affixed temporarily sticky together to get the appropriate cooling after curing adhesive strength.
Formula of hot melt adhesive is a solid solution composed of thermoplastic elastomer, thickening agent and other ingredients together. Hot melt adhesive and non prescription is different, the thermoplastic elastomer or individual components at room temperature or higher temperature are unable to provide appropriate viscosity.
The three basic components of thermoplastic elastomers are styrene block copolymer (SBC), ethylene vinyl acetate copolymer (EVA) and amorphous polyolefin (APO).
Depending on the specific physical properties of the application market, various types of tackifier (natural and synthetic resins) can be used to modify these thermoplastic elastomers to produce a variety of special adhesive properties.
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