Functionality and testing analysis of coated fabrics for tents

Abstract: This article tests and analyzes the conventional performance properties such as light fastness, water fastness, breaking strength, and tear strength of the selected coated fabrics for tents. In addition, it focuses on analyzing the moisture absorption, quick-drying, and waterproof properties of the coated fabrics for tents. Functional principles and testing conditions such as breathability and flame retardancy. The commonly used testing methods and evaluation indicators of coated fabrics at home and abroad were compared and analyzed, providing a reference for the formulation of standards for coated fabrics used in tents.

Functionality; the detection tent may be the earliest textile used in building materials. It is simple and lightweight, and has the functions of windproof, rainproof, snowproof, coldproof, dustproof, and mosquitoproof. Today’s tourism development has promoted tourism The development of textiles has directly driven the substantial growth of tent sales in my country. The main domestic testing standards related to tent fabrics include: international standard ISO 10966:2005 “Textiles – Fabrics for awnings and camping tents – Specification” (Sports and recreational equipment—Fabrics for awnings and camping tents—Specification), national standard GB/ T 24139-2009 “Specification for PVC-coated fabric tarpaulins”, national standard GB/T 20463.1-2006 “Rubber or plastic-coated fabrics for waterproofing Part 1: Polyvinyl chloride-coated fabrics”, Ministry of Civil Affairs industry standard MZ/T 011-2001 “12m2 Single Tent for Disaster Relief”. However, there is currently no national standard for coated fabrics for tents in China [2].

There are large differences in the items and indicator levels assessed by various standards at home and abroad, each with its own focus and limited scope of application. This makes tent manufacturing companies confused and restricts the healthy and orderly development of the industry to a certain extent. Based on the actual use of tent fabrics in my country, this article selects 10 different styles of tent coated fabric samples classified into light tents and heavy tents, and analyzes the fabric characteristics and testing, aiming to provide a reference for the formulation of standards.

1 Materials and methods 1.1 Test materials The samples used in this test mainly include tourist tent cloth, disaster relief tent cloth and military tent tarpaulin. According to the mass per unit area of the fabric, it is divided into: heavy tent fabrics (mass per unit area greater than 150g/m2), light tent fabrics (mass per unit area less than 150g/m2). The test weight is shown in 1. 1.2 Test method The tent is an outdoor product and needs to meet Requirements for complex outdoor environments such as sunlight and rain. Therefore, in addition to regular performance, functionality also needs to be assessed. On the basis of referring to relevant domestic and foreign standards, this article extracts the assessment indicators of coated fabrics for tents from both conventional and functional aspects, including breaking strength, tearing strength, light color fastness, water color fastness, and hydrostatic pressure , surface moisture resistance, flame retardancy, and anti-aging properties, a total of 8 indicators. The method used in the test is shown in 2.

2 Results and Discussion 2.1 Conventional performance The conventional performance of coated fabrics for tents mainly considers four indicators: breaking strength, tearing strength, light color fastness, and water color fastness. 2.1.1 Breaking strength and tearing strength Since the coated fabric for tents is in a covering or hanging state during use, it has to withstand various tensions from metal brackets, ropes, etc., so the fabric must have greater strength, mainly considering breakage Two indicators: strength and tearing strength. Breaking strength refers to the strength when the yarn is completely broken when directional stretching is applied to the warp or weft direction of the fabric. Tear strength refers to the large external force required for the yarns to break sequentially when the fabric has tears. The greater the breaking strength and tearing strength, the stronger and more durable the fabric will be, and the better its wind and pressure resistance will be. Breaking strength and tearing strength test strength of heavy-duty tent fabrics: the warp direction is in the range of 1150N to 1280N, and the weft direction is in the range of 1050N to 1250N; the breaking strength of the test sample is much greater than the requirement of general fabrics ≥ 150N.

It can be seen from the test data of 2 that the tearing strength of lightweight tent fabrics (1#~5#): the warp direction is in the range of 5N to 8N, and the weft direction is in the range of 4N to 8N; heavy-duty tent fabrics (6#~10#) Tear strength: The warp direction is between 43N and 83N, and the weft direction is between 42N and 78N. The tearing strength of lightweight tent fabrics is poor, and the tearing strength of heavy-duty tent fabrics is much higher than the requirement of ≥10N for general fabrics. 2.1.2 Color fastness to light and color fastness to water No matter what type of product it is made from, the coated fabric for tents will be washed by light and rain during use, and the coated fabric for tents does not come into direct contact with the human body, so It mainly assesses two indicators: color fastness to light and color fastness to water. The specific test methods are GB/T 8427 method 3 and GB/T 5713. See 3 for the test results. From the test data, it can be seen that the color fastness of the coated fabrics for tents is relatively good. The light color fastness of the 10 samples tested is not lower than level 4~5, and the water fastness is not lower than level 3~4. The light fastness and water fastness test samples of lightweight tent fabrics (1#~5#) and heavy tent fabrics (6#~10#) are all at a high level, with no obvious difference, and are both higher than ordinary textile products. Standard first-class product requirements. 2.2 Functionality 2.2.1 Waterproof tent coated fabrics are exposed to the outside and are often affected by rainwater, so they are required to have good waterproof properties. There are many test methods for measuring the waterproof properties of textiles at home and abroad, but the main ones are Divided into two aspects, on the one hand��Measures the resistance of the textile surface to being wetted by water – surface moisture resistance. On the other hand, it measures the resistance of the textile surface to water penetration – hydrostatic pressure.

2.2.1.1 Hydrostatic pressure Hydrostatic pressure is measured in accordance with the test standard: GB/T 4744-1997 “Hydrostatic Pressure Test for Determination of Water Permeability Resistance of Textile Fabrics”. The water pressure rise rate is 6k Pa/min. The coated fabric for tents will often be damaged by wind, sun, rain, etc. during use, and the coating will be damaged or peeled off, affecting its durable use. Therefore, in addition to considering the original hydrostatic pressure, it must also be assessed Humidity resistance after low temperature and aging. The test results are shown in 3. 3 Hydrostatic pressure test case No. 1# 2# 3# 4# 5# 6# 7# 8# 9# 10# Unit area mass/(g/m2) 89 93 105 78 115 212 220 196 200 2341 Unit area of different fabrics The quality test index test adopts the standard index type Breaking strength GB/T 3923.1 Conventional tearing strength GB/T 3917.1 Conventional color fastness to light GB/T 8427-2008 Conventional color fastness to water GB/T 5713 Conventional hydrostatic pressure GB/T 4744-1997 Functional surface moisture resistance GB/T 4745 Functional flame retardant GB/T 5455 Functional aging resistance FZ/T 01008 Functional 2 test method were32

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