The utility model relates to a hollow elastic breathable crimped composite non-woven fabrics, including non-woven fabric, elastic film surface has many many air holes and air holes along the orifice of a convex apron and elastic membrane under tension of the elastic film on the surface of the convex stage and the bottom rebound after the hot pressing compound non-woven fabric made of elastic insulating breathable crimped composite non-woven fabric. The advantages are: without hot melt adhesive, can realize composite bottom non-woven fabrics with an elastic membrane, to ensure that the breathable elastic film and the influence of non-woven itself heating melt; two is the design of opening elastic film, not only makes the elastic membrane tensile rate is greatly increased, but also has high elasticity, high expansion rate features; the three is to design the orifice convex elastic membrane, the composite layer of non-woven fabric and elastic membrane boss mouth, not only the complex non woven fabric is on the left, before and after the ventilation function and excellent air permeability, and good flexibility, create more support transparent hollow composite non-woven precedent.
【技术实现步骤摘要】
弹性中空透气折绉式复合无纺布
本技术涉及一种既无需热熔胶,也无需拉伸无纺布,便能将底层无纺布复合在拉伸状态下弹性膜面凸台口部的弹性中空透气折绉式复合无纺布,主要用于医用绷带和卫生用品,属复合无纺布制造领域。
技术介绍
CN202213263U、名称“一种复合无纺布”,由至少一层弹性无纺布和至少一层弹性膜复合而成。所述弹性膜为聚氨酯薄膜。所述弹性无纺布和弹性膜藉由粘合剂复合而成。所述粘合剂为热熔胶。弹性无纺布和弹性聚氨酯透气膜在进行复合操作时均处于拉伸状态,在复合完成后自动回缩。其不足之处:一是该复合无纺布复合成型时需要弹性无纺布和弹性聚氨酯透气膜在处于拉伸状态完成复合,复合成型后的无纺布的弹性膜的弹性受弹性受弹性无纺布的制约,得到的是以弹性无纺布弹性为限的复合无纺布,其弹性非常有限;二是弹性无纺布与弹性聚氨酯透气膜的复合依赖于热熔胶,而热熔胶的基本树脂是乙烯和醋酸乙烯在高温高压下共聚而成的EVA树脂,而EVA树脂的粘性本身很低,需加入增粘剂,如改性松香(138或145),C5石油树脂,C9石油树脂,萜烯树脂等,这些成份的加入使得热熔胶的粘性增强,但其作为弹性无纺布与弹性聚氨酯透气膜的复合介质时,却大大堵塞了弹性无纺布的透气性,使复合成型后的复合无纺布的透气性大大降低,甚至很差。
技术实现思路
设计目的:避免
技术介绍
中的不足之处,设计一种既无需热熔胶,也无需拉伸无纺布,便能将面层无纺布和底层无纺布复合在拉伸状态下弹性膜两面的弹性中空透气折绉式复合无纺布。设计方案:为了实现上述设计目的。本技术在结构设计上:1、弹性膜的膜面有很多透气孔的设计,是本技术的技术特征之一。这 ...
【技术保护点】
一种弹性中空透气折绉式复合无纺布,包括无纺布,其特征是:弹性膜(2)的膜面有很多透气孔(4)且透气孔孔口沿呈凸台口(5),弹性膜(2)在拉伸状态下其弹性膜面上的凸台口(5)部与底层无纺布(3)热压复合后回弹构成弹性中空透气折绉式复合无纺布。
【技术特征摘要】
1.一种弹性中空透气折绉式复合无纺布,包括无纺布,其特征是:弹性膜(2)的膜面有很多透气孔(4)且透气孔孔口沿呈凸台口(5),弹性膜(2)在拉伸状态下其弹性膜面上的凸台口(5)部与底层无纺布(3)热压复合后回弹构成弹性中空透气折绉式复合无纺布。2.根据权利要求1所述的弹性中空透气折绉式复合无纺布,其特征是:所述弹性膜为弹性打孔透气膜。3.根据权利要求2所述的弹性中空透气折绉式复合无纺布,其特征是:所述底层无纺布(3)在弹性打孔透气膜(2)被拉伸的状态下通过凸凹辊组被热压复合在弹性膜(2)的凸台口(...
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