Composite core in China, which first appeared in 2008, mainly has three-tier and five tier structures. 2019 is a year for it to move towards a new milestone, including the launch of online composite core diapers by many domestic and foreign brands. The introduction of the newly improved rubber free core means that the structure of absorbent paper has been improved again.

1.Equipment and process of composite core

In terms of equipment and process, the application and production process of composite core have evolved from the original single hanging and single feeding to the current multi-element feeding, automatic receiving and multi-element combined feeding. The equipment and process flow have undergone fundamental changes. The early core equipment was a single material compounding machine. Due to the simplicity of product requirements and the limitations of matching materials, it failed to achieve the desired application effect. Its packaging method has also evolved from the original single roll type to roll type, winding type and box type. On the basis of the original, the core is coated to reduce the scattering of high absorption resin (SAP).

2.Material matching of composite core

In terms of the collocation of materials, composite core has gone from the basic collocation method composed of dry paper, fluffy non woven fabric, hot melt adhesive and SAP to the current reasonable collocation according to the characteristics of different materials and the advantages of different brands of SAP. The proportion of its various materials has been improved and upgraded for many times, from ordinary materials produced solely for composite products to unique core materials concerned by the whole industry chain, which has also promoted the development of special materials for it in many material fields, laying a good foundation for its further development.

3.Product requirements of composite core

As for the requirements of core products, composite core, as the core material of diapers, has been widely accepted by the market in recent years, and the requirements of various manufacturers for its materials have gradually increased. In the process of its development, the market has gradually formed the standards of its physical and chemical properties and safety performance. The physical and chemical performance indicators include quantitative, width, absorption ratio, water retention and back osmosis, absorption time, moisture, whiteness, etc. the safety performance includes pH value, microorganisms, black spot impurities, foreign matters, metals, needles, etc. While the standards are becoming more and more perfect, production enterprises also put forward higher requirements for the thin, soft and dry products, prompting their manufacturers to be more refined to meet the market demand.

4.Final product of composite core

From the perspective of final products, it is gradually changing from the initial offline production to online production, and some domestic diaper equipment manufacturers have been at the forefront of the industry. With the increasingly fierce competition in the industry, online production of composite core is the future development trend.

Composite core is the core material in the process of diaper product quality leap and process improvement in the past 10 years. Because it is not easy to lump, continuous layer, light and breathable, it has been concerned and recognized by the majority of consumers. Its products are also constantly improving, from the original single composite products to the current composite of various materials and processes. Diaper manufacturers and material factories have invested in the R & D and process adjustment of absorbent paper, making it the core material of diapers.