Introduction of the composition of hot melt pressure sensitive adhesive
The hot melt adhesive 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 release paper, a cloth or a plastic film. A new type of adhesive tape, mainly used for various types of sealing, sealing, paper packaging, beverage bottle label Source: Network Editor: Glue Dots Hot melt pressure sensitive adhesive hot melt adhesive pressure sensitive adhesive, is pressure sensitive adhesive a new type of adhesive tape mainly prepared by mixing and heating a synthetic rubber, a resin and a rubber oil into a molten state and then applying it on a substrate such as a release paper, a cloth or a plastic film, and is mainly used for each of the adhesive tapes. Class sealing, sealing, paper packaging, beverage bottle label, sealing aluminum foil, flexible packaging and other packaging and environmentally friendly paper pallets, etc., to adapt to various materials. Hot melt pressure sensitive adhesives are usually composed of the following main components: 1. Styrene block copolymer (SBC) SBC provides cohesion, strength and heat resistance for hot melt pressure sensitive adhesives. The styrene phase forms a physically crosslinked network in the adhesive at room temperature. The SBC melts above the glass transition temperature of the styrene phase and can flow, which is about 90 to 110 °C. There are four commonly used SBCs in the market for hot melt pressure sensitive adhesives: styrene-isoprene-styrene (SIS), styrene-butadiene-styrene (SBS), styrene-(ethylene-butene). Styrene (SEBS, hydrogenated SBS) and styrene-(ethylene-propylene)-styrene (SEPS, hydrogenated SIS). Each SBC has its own unique molecular structure that can be used in a wide variety of special applications. The styrene content, the coupling ratio and the melt flow rate in the SBC are three key molecular structural parameters that affect the hot melt pressure-bonding properties and processing properties. 2, plasticizer plasticizer can effectively reduce the hardness and viscosity, improve the low temperature resistance of hot melt pressure sensitive adhesive, while also reducing the formulation cost of the adhesive. There are two types of plasticizers commonly used in hot melt pressure sensitive adhesive formulations. Mineral oils are chelates containing different proportions of alkyl (Cp), cycloalkyl (Cn) and aryl (Ca) components. Mineral oils with different solubility parameters have different degrees of compatibility with the selected SBC and therefore have a certain degree of influence on the subsequent properties, especially low temperature and high temperature resistance. Polybutene oil has a very low polarity and is therefore less compatible with the rubber blocks of most SBCs. The degree of hydrogenation and molecular weight of polybutene oil is an important parameter for two compatibility when used in combination with SBC. The higher the degree of hydrogenation, the lower the polarity and the poorer compatibility with the rubber midblock. The lower the molecular weight, the better the compatibility with SBC. Replacing mineral oil with polybutene oil can greatly improve the cohesion and heat resistance of hot melt pressure sensitive adhesives. 3. Antioxidants There are many different types of antioxidants in the chemical market. In general, suitable antioxidants should be effective in terminating reactive free radicals generated during heat aging, mechanical shearing, and long-term storage to prevent or reduce cracking of the hot melt pressure sensitive adhesive. The ingredients used in the hot melt pressure sensitive adhesive formulation are 100% solids free of volatile organic compounds. Hot melt pressure sensitive adhesives are safe during production, storage and gluing without the risk of fire and explosion. This article is edited by Glue Dots hot melt pressure sensitive adhesive. If there is any infringement, please contact! Original link: http://?ID=53&SortID=http://news.chinawj.com.cn Edit: (Hardware Business Network Information Center) http://news.chinawj.com.cn Alcohol Hose,Alcohol Resistant Hose,Food Grade Flexible Hose,Food Grade Transfer Hose Changxing VACUFLEX Hose Technology Co., Ltd. , https://www.vacuflex-cn.com