Neoprene adhesive Status and Prospects - neoprene adhesive, shoe industry, shoe - footwear industrie

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Neoprene adhesive because of excellent low cost, versatility, applicability, since the 50s of last century has developed rapidly since the advent of the long ranks first in solvent-based rubber adhesives. Only began to slow down after 80 years, the reason is toxic and flammable solvents, adhesives feared the dangers and security, countries have already restricted. Some countries such as China until July 2002 Caidui neoprene adhesive limit of harmful substances.

Along with the increasingly stringent environmental regulations and increasing awareness of environmental protection, solvent based polychloroprene adhesive way out? Is necessary to analyze the status of neoprene adhesives and direction of development.

1 neoprene adhesive Status 1.1 philosophy of environmental protection to lead the development of neoprene adhesive

The national implementation of the mandatory standard GB18583-2001, before the harmful solvent-based polychloroprene adhesive substance content is out of control, poisoning or even death an accident occur. From July 1, 2002, after the implementation of standards, there are rules, manufacturers with restraint, as in the past no longer do whatever they want. Never to have control of control is undoubtedly a great improvement.

Should be clear, to GB18583-2001 standard neoprene adhesives market is only a minimum standard of people, not including environmental standards. Comply with environmental trends, there was no "toluene" neoprene, it seems environmentally friendly, it is not true, no "toluene" does not necessarily sound, may not fully comply with environmental requirements. Information is both environmentally friendly adhesives should not poison the human body, but also pollution to the environment, both before both genuine. The higher standard of green adhesives, absolutely can not just use the crown.

China has developed a small business environment symbol neoprene adhesive, adhesive with good results. Environmental Labeling Product Certification technical requirements (HBC18-2003) (adhesive) is more stringent limits on hazardous substances, the production process may not add benzene, toluene, xylene, halogenated hydrocarbons and other toxic organic solvents. But this environmentally friendly neoprene adhesive, because of their higher prices, but were praised.

1.2 compliance and shelf life can not go hand in hand
The so-called compliance is achieved GB18583-2001 standard, durability is the performance line HG/T3738-2004 "multi-purpose solvent-based neoprene adhesive" standards. As the GB18583 standard provides only limited harmful substances is hardly a performance bond requirements, simple compliance is not difficult, but the adhesion is low, the market will not be accepted. Compliance and the shelf life should go hand in hand, not difficult, but increased and the freezing of the cost variation is the bottleneck, resulting in some enterprises did not use GB18583 standard limited opportunity chlorinated solvents, heavy use of low quality, low-cost 1,2 a dichloroethane, although the standard test, but very toxic, in fact, is "BTX" standards of the toxicity of the transfer, harm can not be underestimated. Some adhesive per ton amount of 1,2-dichloroethane as high as a 300-400kg, great sense of dismay. GB19340-2003 "Adhesives for shoes and bags," standards, halogenated hydrocarbons and the total amount of n-hexane made more stringent requirements, be guided by the Executive.

Current solvent-based polychloroprene adhesive quality of a larger number of enterprises in order to reduce costs, still use prohibited by the state of benzene or benzene as the system glue mixed solvent benzene content higher than the standard, from the times to 70 times the completely inconsistent with national standards.

Some people think, to GB18583 standards of poor application performance neoprene adhesive, in fact, does not mean that compliance glue adhesion sent forth, only slightly higher solid content, and frost resistance is lower than that of benzene with mixed neoprene adhesive. Our results are a clear example. On commercially available low-cost, low solid content measured solvent based polychloroprene adhesive solid content was 16.8%, 45% with mixed benzene, solvents, oil> 35% of the adhesive layer of plywood, the glue to dry after the home 1Omin, stacked After co-hammer pressure, with the momentum built up in books do not open or board damage, in a place 7d 25 freezer ice-free. To achieve the above-mentioned non-compliance of the adhesive properties of rubber, plastic and compliance with a 10% 1,2-dichloroethane, 18.5% solid content to below 14 on a frozen; non-chlorinated solvents, plastic compliance , 20% solid content Ze Xu, freezing

Temperature 1 1190; environmental label adhesive solid content to 23%, freezing temperature of a 9 .
Objective, the benzene solvent is an integrated performance neoprene best solvent, with no other solvent can be comparable, but benzene is carcinogenic, toxic great, definitely can no longer be solvent benzene . Toluene toxicity smaller, only limited use in the United States and Europe in the regulations, the amount of not more than 5%.

1.3 does not mean that the most productive will be eliminated to reduce
Solvent based polychloroprene adhesive production at home and abroad are reducing year by year (see Table 1), which is normal, because they are SBS adhesive and white instead of part of the latex.

Annual production of chloroprene adhesive

Article Source: http://depositarticles.com/

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