CN-122013446-A - Scene-adaptive color MPM non-woven fabric and production method and system thereof

Abstract

The invention provides a scene-adaptive color MPM non-woven fabric and a production method and a system thereof, belonging to the technical field of new materials. The invention successfully provides the MPM non-woven fabric with flexibly designed colors and the efficient production mode thereof, and abundant color series can be prepared by only needing a small amount of primary color raw materials, so that the supply chain and the production flow are greatly simplified, the economy is improved, the color of the obtained product is uniform, stable, safe and nontoxic, the excellent fluffiness and the liquid absorption performance of the material are maintained, and meanwhile, the specific visual properties and the scene recognition function can be directly given to the product through accurate color language, thereby breaking through the bottleneck of the traditional non-woven fabric in the competition of the homogeneous market, and providing key support for the advanced high-end mother and infant, professional medical treatment, personal exercise, industrial wiping and other high added value fields.

Inventors

• LI SHENGLIN
• CHEN BING
• MA JINLIANG

Assignees

• 青岛天一木素机械科技有限公司
• 青岛天一木素新材料科技有限公司

Dates

Publication Date

20260512

Application Date

20260324

Claims (10)

1. 1. A method for producing a colored MPM nonwoven fabric, comprising the steps of: using at least two independent melt-blowing extrusion systems, wherein each system respectively melt-spins polypropylene raw materials added with different types or concentrations of color master batches to form at least two melt-blowing superfine fiber streams with different colors; Simultaneously, defibrating the wood pulp sheet to form a stream of wood pulp fibers; co-three-dimensionally in-line mixing and interweaving the at least two streams of differently colored meltblown microfibers with the stream of wood pulp fibers in a space above the forming wire; And (3) carrying out thermal bonding reinforcement on the mixed fiber web by virtue of the self-adhesion of melt-blown polypropylene fibers, and carrying out one-step molding to obtain the color MPM non-woven fabric.
2. 2. The method of claim 1, wherein one of the at least two sets of melt blown extrusion systems is configured as a dominant color generation unit with spun fibers comprising a color substrate and at least another set is configured as a shade correction unit with spun fibers for shade fine tuning the color substrate.
3. 3. The production method according to claim 1, wherein the addition ratio of the color master batch to the polypropylene raw material is 0.5-5%, and the mass ratio of the wood pulp fiber to the final non-woven fabric is 40-80%.
4. 4. The production method according to claim 1, wherein continuous control of the overall color brightness or saturation of the nonwoven fabric is achieved by dynamically adjusting the mass ratio of the wood pulp fibers to be in the range of 40 to 80%.
5. 5. The method of claim 1, wherein in the three-dimensional in-line mixing step, the degree of mixing of the different fibers is controlled by independently adjusting at least one of the parameters of the injection angle of each of the melt-blowing dies, the vertical distance of the fiber outlet to the forming wire curtain, the melt-blown fiber air flow rate, and the wood pulp fiber air flow rate; the injection angles of at least two meltblowing dies are adjusted to deflect toward each other; the angles of the opposing deflections are each independently 10 ° to 60 °.
6. 6. The production method according to claim 5, wherein the vertical distance from the fiber outlet to the forming wire curtain is set to 150mm to 800mm.
7. 7. The colored MPM nonwoven fabric produced by the production method of any one of claims 1 to 6.
8. 8. The use of the colored MPM nonwoven of claim 7 in the manufacture of a sanitary article, wherein the color of said nonwoven is configured to indicate or adapt the function or use scenario of said disposable sanitary article.
9. 9. The use according to claim 8, wherein the sanitary product comprises a wipe, a sanitary towel, a pad, a diaper, a medical dressing or a surgical gown.
10. 10. A system for producing colored MPM nonwoven fabrics, comprising: at least two independent melt-blown extrusion devices, each device is provided with an independent masterbatch adding and metering module, a melt extrusion module and a precise spinning die head; A set of wood pulp fiber treatment device, which comprises a wood pulp fiber splitting machine and a wood pulp fiber conveying channel connected with an outlet of the splitting machine; a common forming screen disposed below the spinning die of the at least two sets of melt-blown extrusion apparatus and the outlet of the wood pulp fiber conveying channel; wherein the system is configured to: controlling the operation of a first melt-blown extrusion device to enable the first melt-blown extrusion device to operate according to a first color masterbatch formula, wherein the formula comprises one or more color masterbatch, each color masterbatch has a first concentration, and the first melt-blown extrusion device is used for spinning and spraying a first fiber stream forming a color substrate; Simultaneously controlling the operation of a second melt-blown extrusion device to enable the second melt-blown extrusion device to operate according to a second color master batch formula, wherein the formula is different from the first formula in the type of the contained color master batch and/or the concentration of at least one color master batch, and spinning and spraying a second fiber stream for fine tuning the color of the color substrate; Simultaneously controlling the operation of the wood pulp fiber treatment device to defibrate the wood pulp plate and convey a wood pulp fiber flow; The first fiber stream, the second fiber stream and the wood pulp fiber stream are three-dimensionally interwoven and composited in air before reaching the forming wire curtain.

Description

Scene-adaptive color MPM non-woven fabric and production method and system thereof Technical Field The invention relates to the technical field of new materials, in particular to a scene-adaptive color MPM non-woven fabric and a production method and system thereof. Background The MPM (Melt-Pulp-Melt) production process is an innovative dry non-weaving technology, and is characterized in that two Melt-blown (Meltblown) systems and one Pulp (Pulp) fiber system are utilized to work cooperatively on line, namely two Melt-blown superfine fiber flows and one Pulp fiber flow are instantly mixed in the air in the forming process, and fiber compounding and reinforcement are completed in one step by virtue of the self-adhesion of the Melt-state PP fibers, and the whole process does not need water or chemical adhesives. Currently, the main stream is mainly made of composite materials of polypropylene (PP) and wood pulp. The material produced based on the process, namely MPM non-woven fabric, is a composite material with the environment-friendly flushability of wood pulp and the soft high-strength characteristic of melt-blown superfine fibers, and is mainly applied to the field of cleaning and nursing, such as wet tissues, dry tissues, makeup removing tissues and the like. The production process skillfully combines the melt-blown technology and the pulp fiber crushing technology, namely, the natural wood pulp fiber raw material wood pulp is fully dispersed into a single fiber state through a fiber-separating machine to ensure excellent liquid absorption performance and environmental protection property, and meanwhile, after the melt-blown material PP is melted at high temperature, superfine fibers are sprayed through a precise die head, and the fibers are molded in one step in air flow by virtue of self-adhesion property and are tightly combined with a fluffy wood pulp fiber layer. The finally formed MPM non-woven fabric not only has the special superfine structure and self-adhesive advantage of melt-blown fibers, but also has the high liquid absorption characteristic of wood pulp fibers, and the whole structure presents unique fluffy soft texture and particularly has outstanding water absorption performance. However, with the continuous increase of the demands of the consumer market for individualization and functionality, the limitations of such MPM nonwoven fabrics in color expression are increasingly highlighted. The primary color (white) non-woven fabrics of the current mainstream have strong practicability, but are difficult to meet the different requirements of different fields on color differentiation. In fact, colors become important carriers of product functions and emotion values, and through accurate color positioning, the non-woven fabric can not only promote visual attractiveness, but also establish deep association with specific use scenes, so that the current situation of homogenization competition is broken through. For example, a high-end mother and infant product needs soft macarons to transfer safety, medical protection relies on cool blue-green tone to build professional images, and sports care pursues high-saturation activity color system enhancement use experience and the like. Disclosure of Invention The invention aims to provide a scene-adaptive color MPM non-woven fabric, a production method and a production system thereof, which solve the problem that the current MPM non-woven fabric is single in color and cannot meet the functional and emotional requirements of different application scenes on products through own colors. In order to achieve the above object, the present invention provides the following technical solutions: the invention provides a method for producing a color MPM non-woven fabric, which comprises the following steps: using at least two independent melt-blowing extrusion systems, wherein each system respectively melt-spins polypropylene raw materials added with different types or concentrations of color master batches to form at least two melt-blowing superfine fiber streams with different colors; Simultaneously, defibrating the wood pulp sheet to form a stream of wood pulp fibers; co-three-dimensionally in-line mixing and interweaving the at least two streams of differently colored meltblown microfibers with the stream of wood pulp fibers in a space above the forming wire; And (3) carrying out thermal bonding reinforcement on the mixed fiber web by virtue of the self-adhesion of melt-blown polypropylene fibers, and carrying out one-step molding to obtain the color MPM non-woven fabric. Preferably, one of the at least two sets of melt blown extrusion systems is configured as a primary color generating unit, the spun fibers of which constitute a color substrate, and at least one other set is configured as a shade modifying unit, the spun fibers of which are used to fine tune the shade of the color substrate. Preferably, the addition ratio of the color master batch in the poly