Since the 1980s, non-woven packaging materials gained great progress, mainly because it has the following features and wide range of uses.

Woven packaging material characteristics

1. Light weight, high strength. One of the main features of non-woven packaging materials are lightweight, high strength, such as the United States developed by DuPont Tyvek, a density of 0.38g / cm³, its weight is only 1/2 of the same thickness kraft paper, but the intensity is as high as 2 times the above. Anti puncture strength kraft 6 times, 3 to 4 times as plastic film. When used as a heavy bags, four-layer kraft paper and physical properties as shown in Table 2 Comparison.

2. relatively wide temperature range, such as HDPE nonwoven fabric does not produce shrink at 110 ℃,. 135 ℃ when not melt, minus 73 ℃ still maintain the original understanding and flexibility.

3. moisture, good corrosion resistance, lint, not mildew.

4. with other substrates such as composite paper, film, foil, plastic foam sheet, etc., to improve the physical properties of the material.

The main purpose

Non-woven fabric mainly used for packaging applications severity of packaging materials, light packaging such as e-mail package, rare books store packaging, precision instruments packaging, medical equipment sterilization packaging; re-packaging is mainly used for cement, chemicals, fertilizers, pesticides , grain, sugar, salt, ores, textile and other packaging. Layer kraft paper and non-woven fabric bag, when used for packing cement, its broken package was only 1%, while cement sack kraft paper, damaged up to 25%, woven cement bags, breakage rate of 3 %. Non-woven and woven cement bags comparative technical and economic indicators are shown in Table 3. (Source: off road Baba)

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