Comfortable high-breathability composite material and preparation method thereof

Abstract

The invention discloses a comfortable high-breathability composite material which comprises a soft cotton layer, a melt-blown layer and a carrier layer. According to a preparation method of the composite material, polypropylene master batch is extracted, heating, melting and molding are conducted, the molded raw material is extruded into filaments, hot-air stretching is conducted, a non-woven fabric is taken as the carrier layer and is glued, the stretched raw material is sprayed on the carrier layer, supporting net cooling is conducted, the raw material is cooled into the melt-blown layer, the melt-blown layer is covered with the soft cotton layer, then pressing is conducted together, and finally rolling, slitting and packaging are conducted. The moisture permeability of the formed composite material can reach 4000 g / m / 4 hr, the water pressure resistance can reach 30 mbar or above, and the formed composite material has the advantages of being high in waterproofness, breathability, light and softness. The composite material is suitable as a base film composition material of disposable hygienic products such as protective clothing, diapers, sanitary towels, breast pads and the like.

Description

technical field [0001] The invention relates to a breathable composite material, in particular to a comfortable and highly breathable composite material and a preparation method thereof. Background technique [0002] In real life, sanitary / protective products such as diapers, sanitary napkins, and protective clothing are daily necessities that are often encountered in daily life. , The safety requirements are getting higher and higher. Among them, the air permeability of the product is also one of the important indicators to measure its quality. Products with poor air permeability will cause consumers to easily feel the water vapor when using it. Humidity can also easily cause a large number of microorganisms to grow, affecting the physical and mental health of consumers. [0003] In order to improve the air permeability of products, disposable sanitary products such as diapers, sanitary napkins and breast pads currently on the market generally use PE breathable film as the...

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Problems solved by technology

[0002] In real life, sanitary / protective products such as diapers, sanitary napkins, and protective clothing are daily necessities that are often encountered in daily life. , The safety requirements are getting higher and higher. Among them, the air permeability of the product is also one of the important indicators to measure its quality. Products with poor air permeability will cause consumers to easily feel the water vapor when using it. Stuffy and humid, it is also easy to cause a large number of microorganisms to grow, affecting the physical and mental health of consumers

[0003] In order to improve the air permeability of products, disposable sanitary products such as diapers, sanitary napkins and breast pads currently on the market generally use PE breathable film as the material of the bottom film, while disposable non-woven protective clothing will have certain air permeability. PE breathable film and spunbonded non-woven fabric are used as composite materials; because PE breathable film is composed of calcium carbonate mixed with various polyethylenes, and micropores are produced by stretching, if the process is not properly controlled, calcium carbonate powder is prone to precipitation. , leading to foreign matter pollution, and the moisture permeability of this type of breathable material is generally between 1500-3000g / m2 / 24hr. If you want to increase the moisture permeability, you must increase the stretching ratio. If you stretch too much, it is easy to cause breathability. Irregular changes such as the enlargement of the local pores of the membrane can easily lead to leakage of the produced product

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