Non-woven fabrics composite economical master batch and its producing method and device

Abstract

The present invention relates to a non-woven composite economical master batch and the production method and equipment. The formula of the master batch is: 12 to 18 shares of polypropylene resin with the melt index between 60 and 90, 6 to 10 shares of polypropylene resin with the melt index between 3 and 30, 55 to 65 shares of nanometer-level active calcium carbonate, 8 to 10 shares of polyethylene wax, 0.5 to 0.7 share of composite antioxidant, 1.5 to 2.5 shares of zinc stearate, 1.5 to 2.5 shares of zinc titanate, 1.5 to 2 shares of white oil, and 1.5 to 2 shares of white powder of the rutile titanium dioxide. The production method of the master batch is: the materials are mixed well and sent into the twin-screw extruder; then the materials are sent into the single-screw extruder, aftermelting, extruding, pelletizing, and screening, the non-woven product can be made; the production equipment is a ladder-type screw extruder, including a first-stage twin-screw extruder and a second-stage single-screw extruder; the two extruders are arranged in a T shape. The nanometer-level active calcium carbonate used in the present invention can partially replace the non-woven PP material; addthe present invention into the non-woven PP material; under the premise that the fiber is guaranteed not to be broken when melted and extruded, the material cost can be greatly reduced and a large amount of energy can be saved.

Description

Technical field: [0001] The invention relates to a nonwoven fabric. In particular, it relates to a non-woven composite economical masterbatch used as non-woven fabric, which partially replaces PP, and a production method and equipment thereof. The invention belongs to the technical field of materials for nonwoven fabrics and special production equipment thereof. Background technique: [0002] The raw materials for making non-woven fabrics used to be PP (polypropylene). PP is a by-product of petroleum, which is expensive and consumes a lot of energy. [0003] At present, the processing technology of filling modification, functional masterbatch, and color masterbatch is generally: use a high-speed rotary mixer to fully mix the mediator and various additives with inorganic substances, dehydrate and activate to form a semi-dissolved mass, and then use crushing After the extruder is crushed, the granulation process is completed with a single-screw or twin-screw extruder. With ...

AI Technical Summary

Problems solved by technology

In addition, some processes require the use of low-boiling substances that are immiscible with the mediator to dissolve and separate the additives required in the product from the blend. If the current usual process and equipment are used, the process will be complicated and costly. Time-consuming and labor-intensive, there are constraints on production, for which these processes require the use of new processes and equipment modifications

[0004] The currently used single-screw extruder usually compresses the material entering the feeding section according to a certain compression ratio according to the direction of screw rotation, and then mixes and disperses in the mixing section. The devolatilization effect is poor, and it needs to go through two or The dispersion and devolatilization requirements of the final performance can be completed only after three times of repeated processing

The twin-screw extruder used is an effective equipment that can complete the blending and homogenization and devolatilization process of various blending logistics systems, but the co-rotating twin-screw extrusion has a large shearing effect on the material. The period is under high temperature and high pressure, especially after the material has completed various properties, its fluid is still extruded at a very high temperature, which will have an adverse effect on certain properties of the product, and the high temperature extruded product has poor density. , easy to absorb water twice

At the same time, the self-cleaning property of the twin-screw extruder is poor, resulting in a long residence time of the material, poor dispersion and mixing, and extremely high requirements on the production process, which limits their respective applications in production.

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