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郭老师说:“什么是PU皮” 2018-11-22

 
www.laundryhr.com
 
 
PU皮和超纤皮是同义词,已合并。
 
PU 是英文poly urethane的缩写,化学中文名称“聚氨酯”。

超纤皮全称是“超细纤维增强PU皮革”。它具有极其优异的耐磨性能,优异的透气、耐老化性能,柔软舒适,有很强的柔韧性。
 
超纤皮是最好的人造皮,皮纹与真皮十分相似,手感有点柔软,外人很难分辨是真皮还是再生皮。超纤皮,全称为超细纤维仿真沙发革,也叫再生皮,属于合成革中的一种新研制开发的高档皮革,不是真皮。因其具有耐磨、耐寒、透气、耐老化、质地柔软以及外观漂亮等优点,已成为代替天然皮革的理想选择。天然真皮是由许多粗细不等的胶原纤维“编织”而成,分粒面层和网状层两层,粒面层由极细的胶原纤维织而成,网状由较粗的胶原纤维编织而成。
 



 
PU是聚氨酯。聚氨酯皮革具有优异的性能。在国外,由于动物保护协会的影响,加之技术的发展,聚氨酯合成革的性能和应用面超过了天然皮革。加入超细纤维后,聚氨酯的韧性和透气性、耐磨性得到了进一步加强。这样的制成品毫无疑问,性能是相当优异的。
 
应用:箱包、服装、鞋、车辆、汽车坐垫、汽车脚垫、家具、仿皮沙发 
 
特点
超纤皮主要有以下特点:
1、耐折牢度可以和天然皮革相媲美。常温弯曲达到20万次无裂纹低温(-20℃)弯曲3万次无裂纹(耐温性、机械性好)。
2、伸长率适中(皮感好)。
3、撕裂强度和剥离强度较高(耐磨性、撕裂力、拉力强度高)。
4、从生产到使用不会有任何污染,环保性能优越。
 
超纤皮的外观效果最像真皮,其产品的厚薄均匀性、撕裂强度、色彩鲜艳度及革面利用率等方面还优于天然皮革,已经成为当代合成革的发展方向。超纤皮表面如有脏污,可用高标号汽油或清水擦洗,切不可用其它有机溶剂或带有碱性的物质擦洗,以防质量受损。超纤皮使用条件:热定型温度100℃时不超过25分 钟,120℃时不超过10分钟,130℃时不超过5分钟。
 
PU皮革与天然皮革
 
天然皮革由于具有优良的天然特性被人们广泛用于生产日用品和工业品,但随着世界人口的增长,人类对皮革的需求倍增,数量有限的天然皮革早已不能满足人们这种需求。为解决这一矛盾,科学家们几十年前即开始研究开发人造革、合成皮革,以弥补天然皮革的不足。50多年的研究历史过程就是人造革、合成革向天然皮革挑战的过程。
 
科学家们从研究分析天然皮革的化学成分和组织结构开始,从硝化纤维漆布着手,进入到PVC人造革,这是人工皮革的第一代产品。科学家在这一基础上,做了多方面的改进和探索,首先是基材方面的改进,随后是涂层树脂的改性和改进。到了20世纪70年代,合成纤维的无纺布出现针刺成网、粘结成网等工艺,使基材具有藕状断面、空心纤维状,达到了多孔结构,而符合天然革的网状结构要求;当时的合成革表层已能做到微细孔结构聚氨酯层,相当于天然革的粒面,从而使PU合成革的外观和内在结构与天然革逐步接近,其他物理特性都接近于天然革的指标,而色泽比天然革更为鲜艳;其常温耐折达到100万次以上,低温耐折也能达到天然革的水平。
 
继PVC人造革之后,PU合成革经过科技专家们30多年的潜心研究和开发,作为天然革的理想替代品,获得了突破性的技术进步。
 
PU涂于织物表面最早出现于20世纪50年代的市场上,到了1964年,美国杜邦公司开发出了一种用作鞋帮的PU合成革。经过20多年的不断研究开发,PU合成革无论在产品质量、品种,还是产量上都得到了快速地增长。其性能越来越接近天然皮革,某些性能甚至超过天然皮革,达到了与天然皮革真假难分的程度,在人类的日常生活中占据着十分重要的地位。
 
国内国际市场上出现了超细纤维聚氨酯合成革是第三代人工皮革。其三维结构网络的无纺布为合成革在基材方面创造了赶超天然皮革的条件。该产品结合新研制的具有开孔结构的PU浆料浸渍、复合面层的加工技术,发挥了超细纤维巨大表面积和强烈的吸水性作用,使得超细级PU合成革具有了束状超细胶原纤维的天然革所固有的吸湿特性,因而不论从内部微观结构,还是外观质感及物理特性和人们穿着舒适性等方面,都能与高级天然皮革相媲美了。此外,超细纤维合成革在耐化学性、质量均一性、大生产加工适应性以及防水、防霉变性等方面更超过了天然皮革。
 
实践证明,合成革的各项优良性能是天然皮革无法取代的,从国内外的市场来分析,合成革也已大量取代了资源不足的天然皮革。采用人造革及合成革做箱包、服装、鞋、车辆和家具的装饰,已日益得到市场的肯定,其应用范围之广,数量之大,品种之多,是传统的天然皮革无法满足的。
 
PU皮革制品保养方法
 
清洁方法:
1.沾水及洗涤剂清洗,忌汽油擦洗
2.不能干洗
3.只能水洗,且水洗温度不能超过40度
4.不能用阳光曝晒
5.不能接触一些有机溶剂
6.PU皮的外套需要挂装套袋收藏,不可以折装
 
PU与人造革的特性:
 

1.强度高,薄而有弹性,柔软滑润,透气透水性好,并可防水
2.低温下仍具有较好的抗张强度和曲 扰强度,有较好的耐光老化性和耐水解稳定性
3.不耐磨,外观和性能均接近天然皮革,易洗涤去污,易缝制
4.表面光滑紧密,可进行多种表面处理及染色,品种多样





PU leather and microfiber skin is a synonym, has been combined.
 
PU is the abbreviation of English urethane, chemical Chinese name "polyurethane".
Microfiber skin full name is "ultra-fine fiber reinforced PU leather." It has extremely excellent wear resistance, excellent breathable, anti-aging properties, soft and comfortable, has a strong flexibility.
 
Microfiber skin is the best artificial leather, striae and leather is very similar, feel a bit soft, it is difficult to distinguish between outsiders is leather or recycled skin. Microfiber skin, called the ultra-fine fiber simulation sofa leather, also known as recycled leather, synthetic leather is a new research and development of high-grade leather, not leather. Because of its wear, cold, breathable, anti-aging, soft texture and beautiful appearance, etc., has become an ideal alternative to natural leather. Natural dermis is composed of many different thickness of collagen fibers "woven" made of sub-surface layer and mesh layer of two layers, grain layer from the very fine collagen fibers woven from the coarse network of collagen fibers .
 
PU is a polyurethane. Polyurethane leather has excellent properties. In foreign countries, due to the impact of animal protection associations, coupled with the development of technology, polyurethane synthetic leather performance and application of more than natural leather. By adding ultra-fine fibers, the toughness and permeability of polyurethane, wear resistance has been further strengthened. There is no doubt that such a finished product, the performance is quite excellent.
 
Applications: luggage, clothing, shoes, vehicles, car cushion, car mats, furniture, imitation leather sofa

Features
Microfiber skin mainly has the following characteristics:
1, folding fastness and natural leather can be comparable. (-20 ℃) ​​bending 3 million times without cracks (temperature resistance, good mechanical).
2, elongation moderate (skin feeling good).
3, high tear strength and peel strength (abrasion resistance, tearing force, high tensile strength).
4, from production to use will not have any pollution, environmental performance superior.
 
The appearance of superfiber skin most like leather, the thickness of the product uniformity, tear strength, color and leather surface utilization rate is also superior to natural leather, synthetic leather has become the development direction of contemporary. Microfiber skin surface if dirty, available high-grade gasoline or water scrub, must not be used with other organic solvents or scrub with alkaline substances to prevent damage to quality. Use conditions: heat setting temperature is not more than 25 minutes at 100 ℃, 120 ℃, not more than 10 minutes, 130 ℃, not more than 5 minutes.
 
PU leather and natural leather
 
Natural leather has excellent natural properties because it is widely used in the production of daily necessities and industrial products, but with the world's population growth, human demand for leather doubled, a limited number of natural leather has long been unable to meet this demand. To solve this problem, scientists began to study a few decades ago to develop artificial leather, synthetic leather, to make up for the shortage of natural leather. More than 50 years of research process is the history of artificial leather, synthetic leather to natural leather challenge process.
 
Scientists from the analysis of natural leather chemical composition and structure of the beginning, from the start of nitrocellulose lacquer into the PVC artificial leather, which is the first generation of artificial leather products. Scientists on this basis, made a number of improvements and exploration, the first is the improvement of the substrate, followed by coating resin modification and improvement. To the 20th century, 70 years, non-woven synthetic fiber needle-forming network, bonding into the network and other technology, the substrate has a lotus-like section, hollow fiber-like, to a porous structure, and consistent with natural leather network structure Requirements; the surface of the synthetic leather has been able to do microporous structure of polyurethane layer, the equivalent of natural leather grain, so that the appearance and internal structure of PU synthetic leather and natural leather gradually close to other physical properties are close to the natural leather Indicators, and color than the natural leather is more bright; its temperature at room temperature to reach more than 1 million times, low temperature folding can achieve the level of natural leather.

Following the PVC artificial leather, PU synthetic leather after 30 years of technology experts with great concentration of research and development, as an ideal alternative to natural leather, access to a breakthrough in technological progress.
 
PU coating on the surface of the fabric first appeared in the 1950s on the market, to 1964, the United States DuPont developed a PU for the upper synthetic leather. After 20 years of continuous research and development, PU synthetic leather in terms of product quality, variety, or yield have been on the rapid growth. Its performance more and more close to the natural leather, some properties even more than natural leather, with natural leather to the level of true and false, in human daily life occupies a very important position.
 
Domestic and international markets have appeared on the ultra-fine fiber polyurethane synthetic leather is the third generation of artificial leather. Its three-dimensional structure of the network of non-woven synthetic leather in the substrate to create a catch-up natural leather conditions. The product, combined with newly developed PU slurry impregnated with composite structure, has played a huge surface area of ​​superfine fibers and strong water absorption, making the ultra-fine PU synthetic leather with a superfine beam Collagen fiber natural leather inherent moisture absorption characteristics, so no matter from the internal microstructure, or the appearance of texture and physical properties and people wearing comfort, and so on, and advanced natural leather can be comparable. In addition, the ultra-fine fiber synthetic leather in chemical resistance, quality uniformity, large production and processing adaptability and waterproof, mildew degeneration, etc. more than natural leather.
 
Practice has proved that the excellent performance of synthetic leather is a natural leather can not be replaced, from the domestic and international market analysis, synthetic leather has also been a large number of natural leather to replace the lack of resources. The use of artificial leather and synthetic leather bags, clothing, shoes, vehicles and furniture decoration, has been increasingly affirmed by the market, its wide range of applications, the large number of varieties, is the traditional natural leather can not be met.
 
PU leather products maintenance methods
 
Cleaning method:
1. Dip the water and detergent, avoid gasoline scrub
2. Can not dry-clean
3. Can only be washed, and washing temperature can not exceed 40 degrees
4. Do not use sun exposure
5. Do not touch some organic solvents
6.PU leather jackets need to wear bagging collection, not folding equipment
 
PU and artificial leather characteristics:
 
1. High strength, thin and flexible, soft and smooth, breathable and water-permeable, and waterproof
2. Low temperature still has good tensile strength and bending disturbance strength, good light resistance to aging and hydrolysis stability
3. Not wear-resistant, appearance and performance are close to natural leather, easy to clean decontamination, easy sewing
4. Smooth surface, can be a variety of surface treatment and dyeing, species diversity

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