Unveiling The Core Technology Of Type I Baby Diaper Manufacturing Machinery: Automation From Raw Materials To Finished Products

I. Raw Material Processing: Precise Proportioning and Pretreatment Technology
1.Raw Material Screening and Storage System
The first category of equipment uses intelligent warehousing system that use RFID technology to track the inventory and quality parameters of raw materials such as pulp, superabsorbent polymer, nonwoven fabric, PE membranes and more in real time. For example, a feedstock testing module in a branded device automatically removes batches of pulp containing excessive impurities, ensuring that the purity of the feedstock is over 99.9%. At the same time, the particle size distribution of SAP is monitored online by a laser diffractometer to ensure stable absorption.
2.Pulp Preparation and Static Electricity Elimination
After the pulp is processed by pulping machine, the static electricity in the pulp is removed by electrostatic elimination device to prevent caking in subsequent mixing process. In a certain company's production line, its electrostatic elimination module uses high-voltage ionization technology to reduce the surface charge density of pulp fibers to ± 5μC/g, significantly increasing the mixing uniformity of SAP and pulp.
3.Vacuum Mixing of SAP and pulp
The mixing chamber uses a a double-spiral stirrer and a vacuum negative pressure system to evenly mix SAP and pulp at a ratio of 1: 4 in a -80kPa environment. The angle of stirring blade is optimized by CFD simulation, and the stirring time is shortened to 8 seconds.
ii. Core Forming: Three-Dimensional Structure and Absorption Performance Control
1. Vacuum Adsorption Forming Technology
Blend pulp is used to form a thin core plate with a thickness of only 2mm by a vacuum adsorption mold. A certain company's equipment adopts a porous ceramic adsorption plate, combined with dynamic vacuum adjustment system, can adjust the adsorption pressure according to the liquid absorption needs of different regions of the core, and realize the gradient structure of ``fast absorption and then water retention ''.
2. Hot-press lamination and conduction layer implantation: the core material is welded to the conduction layer non-woven cloth by ultrasonic wave after 180 ° C thermal roller pressing. The guide layer uses a 3D conical perforation technology with pore diameter of 0.3mm and pore density of 500 pores/ square cm, which can increase the rate of liquid diffusion by 3 factor of three. One brand of equipment uses a visual inspection system to monitor the pore position deviation of the diversion layer in real time, ensuring an error ≤0.05mm.
3. Elastic waistband and 3D Leakproof Edge Processing: Belt is a point-like coating made from spandex yarn and non-woven fabric bonded to hot melt adhesive, achieving a 200% elongation and > 95 95% rate. Ultrasonic welding is used to prevent leakage, forming a 3-D protective barrier of 8mm high and 15mm wide, effectively preventing side leakage. A certain type of equipment adopts tension control system to match 98% elastic modulus between belt and leakproof edge.
III. Composite Assembly: Precise Bonding of Multi-Layer Structures
1. High-Speed ​​Lamination Positioning Technology: servo motor-driven roller groups cores, surface nonwoven cloth and PE substrate are used to synchronize a lamination accuracy ± 0.1mm. One company's equipment uses laser positioning system to dynamically correct each layer during layering, avoiding the risk of leakage due to dislocation.
2. Hot Melt Adhesive Spraying: using spiral spray gun, hot melt molding at 0.5g/m2 speed evenly coated. The peel strength of the hot roller reached 15N/25mm after 120 ℃. One device is equipped with a closed-loop control adhesive system that uses infrared sensors to monitor the thickness of the adhesive layer in real time and automatically adjusts the spray pressure to ensure that the adhesive fluctuates less than5 percent.
3. Intelligent cutting and size control: The cutting module uses a high-precision laser or ultrasonic cutter with a cutting speed of 500 pieces perminute and a size deviation ≤0.5mm. One brand's equipment uses a machine vision system to detect burrs at the cut edges, automatically marking defective products and triggering a rejection device. IV. INTRODUCTION Finished Product Inspection: traceability of full process quality
1. Online Water Absorption Performance Testing
Finished product was tested using a simulated urine injection device. water absorption rate, reabsorption, leakage and other parameters are collected by sensor in real time. One company's equipment use artificial intelligence algorithms to analyze test data and automatically adjust production parameters to optimize performance. For example, when reabsorption is greater than 0.5g, the system increases the heat pressure temperature to enhance core density.
2. Metal Detection and foreign body removal
Finished products are passed through a high-sensitivity metal detector (detection accuracy φ0.8mm). When a metal foreign object is detected, a pneumatic removal device can isolate defective product in 0.2 seconds. One model is also equipped with an X-ray foreign object detection system to identify non-metallic impurities with a density greater than 1.5g/cm3.
3. Packaging and Information Traceability
The finished products is packaged in an automatic packaging machine and printed with a unique traceability code on a jet. The code includes production batch, raw material information and test data. One brand's equipment uses blockchain technology to store traceability information, allowing consumers to scan code to view the product's entire lifecycle data.
V. Technological Trends: Smart, Sustainable Upgrades
Currently, the first category of devices is moving towards AI + IoT. one company's intelligent production line, for example, comes with a digital twin system that simulates production status in real time and predicts equipment failures. another brand's equipment uses a biodegradable material processing module to support automated production of environmentally friendly raw materials such as PLA and bamboo fiber. In the future, as 5G merges deeply with the industrial internet, Type I baby diaper manufacturing machines will achieve more efficient, flexible production and full chain quality control.
From the selection of raw materials to the packaging of finished products, Type I baby diaper production machinery has built an efficient, stable and sustainable production chain through precise mechanical design, intelligent control system and rigorous quality testing. Its core technology reflects not only the precision and automation level of modern manufacturing, but also the high concern for infant health and environmental protection.