Intelligent Insect Control, 118 Ch Alouettes, Castelnau le Lez, France.
Malar J. 2011 Apr 14;10:87. doi: 10.1186/1475-2875-10-87.
Bursting strength is a standard method for evaluating mosquito net strength. This article suggests that tension strength with one grab and one hook better represent how holes are generated in bed nets in real life.
Measurements of bursting strength and tension strengths in the two directions are analysed for eight model nets created for the study. The nets were made in the most commonly used denier (75 and 100 D) and mesh (156 holes/inch(2)) for multifilament polyester yarns, texturized or not, and with 4 or 6 sided holes. All were made from one polyester quality. Data was arranged in a randomized, complete block design and analysed for significant variables and their interactions. Data was then subjected to regression analyses using net square metre weight as a weighting factor with stepwise removal of variables. This revealed how the four textile variables interacted and allowed for making predictions for the strength of commercial nets in polyester or polyethylene.
For the model nets, higher denier provided higher bursting strength and tension strengths, texturizing weakened nets and four-sided holes were stronger than six-sided holes. Even when compensating for square metre weight, 100 D nets are stronger than 75 D nets. Results for the commercial polyester net nets are less clear, probably because of different qualities of polyester. Tensile strength: a 75 denier net knitted tightly to provide the same square metre weight as a standard 100 denier net therefore does not obtain the same strength. Polyethylene nets are made of mono-fibre yarns and, therefore, have higher tension strength in both directions than multifilament polyester nets. For bursting strength results overlap for 100 denier yarns of both yarn types. As a class, commercial polyethylene nets are stronger than commercial polyester net whatever method is used for evaluation.
Tension strength measured in the length and width directions of the net using one hook and one clamp provide new relevant data as this method more closely imitates the cause of tear holes in nets as they occur in real life use. Using this methodology, the commercial monofilament yarn polyethylene nets are significantly stronger than the commercial multifilament polyester nets. This test method should be applied for nets used for years in the field.
爆破强度是评估蚊帐强度的标准方法。本文提出，单钩单夹的张力强度更能代表实际生活中蚊帐上的孔是如何产生的。
对为研究制作的 8 种模型网的爆破强度和两个方向的张力强度进行分析。这些网使用最常用的旦尼尔数（75 和 100 D）和网孔（每英寸 156 孔）制造，由多股聚酯纱线制成，有无变形，以及有 4 或 6 边孔。所有网都由一种聚酯质量制成。数据以随机、完整块设计排列，并对显著变量及其相互作用进行分析。然后，使用网平方米重量作为加权因子，对数据进行逐步回归分析，去除变量。这揭示了四个纺织变量如何相互作用，并允许对聚酯或聚乙烯商业网的强度进行预测。
对于模型网，较高的旦尼尔数提供了更高的爆破强度和张力强度，变形削弱了网的强度，四边孔比六边孔更强。即使补偿平方米重量，100 D 网也比 75 D 网更强。商业聚酯网的结果不太明确，可能是因为聚酯的质量不同。拉伸强度：紧密编织的 75 旦尼尔网，提供与标准 100 旦尼尔网相同的平方米重量，因此不会获得相同的强度。聚乙烯网由单纤维纱线制成，因此在两个方向上的张力强度都比多股聚酯网高。对于爆破强度结果，两种纱线类型的 100 旦尼尔纱线重叠。作为一个类别，无论使用哪种评估方法，商业聚乙烯网都比商业聚酯网强。
使用单钩单夹在网的长度和宽度方向测量的张力强度提供了新的相关数据，因为这种方法更能模拟实际使用中蚊帐上的撕裂孔的形成原因。使用这种方法，商业单丝纱聚乙烯网明显比商业多股纱聚酯网强。这种测试方法应适用于多年来在实地使用的网。
