Ultrathin high porosity film and preparation method thereof

Abstract

The invention discloses an ultrathin high porosity film and a preparation method thereof. The film comprises the following components by weight percent: 40-50% of : PE(LLDPE / LDPE), 45-55% of calcium carbonate and 3-5% of modified additives (plastic additive and film forming additive). The preparation method of the invention comprises the following steps: (1) breathable film master batch process flow and (2) breathable film process flow. The product of the invention can replace imported products, thus reducing the production cost of the breathable film, improving the current dilemma of foreignmonopoly, filling the domestic blank to develop and produce the breathable film material with independent intellectual property rights and having practical and great economic benefit and social benefit.

Description

Technical field: [0001] The invention belongs to the technical field of new materials, and more specifically relates to an ultra-thin, highly air-permeable film and a preparation method thereof. Background technique: [0002] A breathable film is a thin film that allows air and gas to pass through, but blocks liquids such as water. It has the characteristics of a fabric that is easy to ventilate and is soft, and it also has the characteristics of a plastic bag that blocks water without getting wet; it is a functional material, also known as a "breathable film", usually used in Both breathable and waterproof occasions are required. This special function makes it occupy a position that other films cannot replace. The application of breathable film covers all fields of human activities: in daily life, it is used for personal hygiene products (such as baby diapers, women's sanitary napkins, etc.), and the waterproof and breathable bottom layer used in diapers and sanitary napk...

AI Technical Summary

Problems solved by technology

[0006] At present, all the breathable membrane manufacturers in my country are relying on imported breathable membrane masterbatch, which increases the cost of the product and makes it difficult for the product to open the market

Moreover, most of the imported breathable membrane masterbatches rely on sea transportation. The long-term transportation process increases the water content of the breathable membrane masterbatch, which is easy to absorb moisture, and is prone to halogenation, which may easily lead to quality problems of the finished breathable membrane.

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