Research and development analysis of non-woven environmental protection bag testing

As people's awareness of environmental protection has increased, the 'white pollution' caused by plastic bags has attracted the attention of various countries. Countries around the world have formulated regulations for shopping plastic bags to restrict or prohibit their use. Various relevant mandatory policies and regulations in my country have been promulgated one after another. 

From June 1, 2008, all major supermarkets across the country have stopped providing plastic shopping bags for free [1]. How to develop alternative products that are conducive to environmental protection and generally accepted by low-income groups has become a research hotspot in solving the problem of plastic bags. Among several alternatives, non-woven shopping bags are considered to be the best alternatives to plastic bags due to their short process flow, high output, rapid variety change, wide source of raw materials, long service life, and degradability. 

This article mainly discusses the bursting strength and abrasion resistance of non-woven eco-friendly shopping bags, in order to encourage people to use eco-friendly bags to protect the earth and humans.

First, The concept of non-woven fabrics. 

1. The concept of non-woven fabrics. The production of non-woven fabrics breaks through the conventional textile processing principles. The filaments are oriented or randomly arranged to form a web structure, which can then be reinforced by mechanical, thermal bonding or chemical methods. 

2. The main properties of non-woven fabrics Non-woven fabrics are made of filaments stacked into a net shape, with high porosity, good light permeability, strong moisture permeability, high air permeability, non-toxic and non-irritating characteristics[ 2]; In addition, it can be recycled for many times, can be degraded or recycled, and has the advantages of light, soft, elastic, corrosion-resistant, and washable. Non-woven fabrics have fast production speed, short process flow, low cost, high output, wide raw material sources and uses, and rich colors. 

3. The production process of non-woven fabrics. According to different processing technologies, the production process of non-woven fabrics can be divided into: needle-punched non-woven fabrics, spunlace non-woven fabrics, wet-laid non-woven fabrics, stitch-bonded non-woven fabrics, and heat-bonded non-woven fabrics. Fabric, meltblown non-woven fabric, spunbonded non-woven fabric, pulp air-laid non-woven fabric, etc. Among them, non-woven environmental protection bags are mostly heat-sealed non-woven fabrics. 

Second, the characteristics of non-woven shopping bags. 

Plastic bags commonly used in daily life are not degradable, or the degradation period will take decades or even hundreds of years. Due to the non-degradable properties of ordinary plastic bags, soil and groundwater are contaminated. In addition, a complete plastic bag can only be used to store garbage or throw away after the items are carried from the supermarket to the residence. There is still a serious waste problem. The environmentally friendly shopping bags are safe and hygienic during use, and can be recycled many times; the used shopping bags can be degraded, or can be recycled and reused [3]. 

Three, Performance test of non-woven shopping bags 

1. Test materials: Several samples of non-woven bags and polyester fiber, polypropylene fiber, and polyethylene plastic bags. 

2. The testing instrument adopts YG(B)026 electronic fabric strength machine, according to FZ/T 60005-1991 to test the bursting strength of fabric; adopts YG(B)522 disc type fabric wear-resistant machine, according to FZ/T 60019 —1994 Test the friction resistance of fabrics.

3. Test principle and steps ①. Bursting strength test method: Cut 4 pieces of non-woven bag samples with Ru003d5 cm, and mark them as 1#, 2#, 3#, 4#, the same, the other is the same 

4 pieces of ordinary polyethylene plastic bags of different sizes, marked as 5#, 6#, 7#, 8#, uniformly adjust the humidity under laboratory conditions for 3 hours; put 8 samples into the cloth clip ring and tighten them , And then place it flat on the cloth chuck holder; press the start button, after the sample is completely capped, the instrument restores to its original state and retrieves the sample backup and records the data. Complete 8 samples according to this method one by one. 

② Test method for abrasion resistance: Cut 4 pieces of non-woven bag samples with Ru003d 5cm, and mark them as 1#, 2#, 3#, 4#. Similarly, take another ordinary polyethylene plastic of the same size. 4 bags, marked as 5#, 6#, 7#, 8#, uniformly adjust the humidity for 3 hours under laboratory conditions, put 8 samples into the cloth clip ring and screw them tightly, and place them On the disc type fabric wear-resistant machine; press the start button and observe the degree of abrasion of the sample. When the sample is broken, press the stop button and record the data.　　

Four, Results and discussion 

1. Bursting strength test results are shown in Table 1. The average breaking strength of non-woven bags is higher than 170.0N, while the maximum breaking strength of ordinary plastic bags is less than 2.0N. This strength reflects the relationship between their strength and carrying capacity. From the above data, it can be seen that the carrying capacity of a non-woven environmental protection bag is equivalent to more than 100 ordinary plastic bags. 

2. Wear resistance The wear resistance of the non-woven environmental protection bag is very good, about 169 times on average, while the ordinary polyethylene plastic bag is about 4 times, the difference is more than 40 times. In terms of wear resistance, a non-woven environmental protection bag is equivalent to dozens of ordinary polyethylene plastic bags.

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