Synonymous with polyester hot-melt fiber-Malti
Melti is a core-sheath composite hot-melt short fiber composed of a core of ordinary polyester and a sheath of low-melting point copolymer polyester or polyethylene fiber. In most cases, after mixing with high-melting point short fibers as the main body to form a fiber aggregate, only the sheath portion is heat-treated at the melting temperature to bond the fibers, impart strength and rigidity to the fiber aggregate, and then shape it into How to use a certain shape.
The warp and weft developed by Malti
Previously, nonwoven fabrics were sprayed with a resin solution or resin emulsion, and then impregnated with a high-temperature dryer. A method of manufacturing nonwoven fabrics by drying and bonding the fibers with resin (resin bonding method).
However, the resin bonding method has problems such as scattered resin liquid and volatilized solvent polluting the working environment, and it is difficult to spread the resin into the fiber web in the prescribed amount.
The manufacturing methods of nonwoven fabrics include carding method, air flow method, wet papermaking method, etc. No matter which method is used, it is easy to uniformly mix two or more kinds of short fibers. When manufacturing the main high-melting point short fiber nonwoven web, if hot-melt short fibers are mixed and the step of adding resin is omitted, there will be no problems with resin liquid scattering and solvent volatilization. In addition, the high temperature used only by the resin method can be eliminated. By using a dryer, it is possible to produce nonwoven fabrics that are uniformly bonded by a specified amount of adhesive. This method is now called thermal bonding.
Malti originally started manufacturing single-component copolymer polyester fiber with a low melting point. However, the polymer used is amorphous, cannot be drawn, and is a fiber with low strength. The original product sometimes smoked on the user’s carding machine. After investigation, it was found that because the fibers were brittle, it looked like smoke when the fibers were cut on the carding machine. Therefore, ordinary polyester was placed in the core to achieve high strength by being drafted, thus completing the development of a core-sheath composite type polyester hot-melt fiber.
The use of Malti is expanded
Malti is a short fiber nonwoven fabric using the thermal bonding method using polyester hot-melt fiber. It was started in 1981 Official production. Since then, almost all major nonwovens manufacturers have developed applications, and the short fiber nonwovens market has continued to expand, and Melti’s sales have also expanded. In addition, for applications requiring a soft style, such as hygienic surface material nonwovens, a type using ordinary polyester for the core and polyethylene fiber for the sheath has been developed. As the baby diaper market expands, this type has also been expanded. of hot melt fiber sales.
Subsequent situation and current situation
The market for short fiber nonwovens using the Melti thermal bonding method continues to expand. About 10 years after the start of production In 1999, polyester hot-melt fiber was basically exclusive in the market. Later, synthetic fiber manufacturers in Japan and abroad joined in. Now, there are 7-8 companies producing this fiber. However, Melti still ranks first in market share and has become synonymous with polyester hot-melt fiber in the Internet. It has a high brand status and its name has deeply penetrated into users. Moreover, its high quality and brand strength have gained high trust from users.
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