结论:面料要同时满足安全和耐久两组要求,两者常有冲突
轮椅上的面料——座面、靠背、坐垫套、扶手垫——看起来是个外观件,实际涉及两类要求:
安全方面主要是阻燃。 使用者多数行动不便,火灾时自主逃离困难,所以面料的燃烧特性直接关系到逃生时间。
耐久方面包括耐磨、抗撕裂、抗起球、色牢度、以及耐清洁消毒。
这两组要求常常冲突:阻燃处理可能影响手感和透气性;高耐磨的材料可能较硬、透气差;柔软舒适的材料往往不耐磨。所以面料选型也是权衡。
阻燃要求的由来与测试
阻燃要求针对的是一个具体场景:坐着的使用者接触到火源(香烟、明火)时,面料会不会迅速燃烧扩散。
测试的基本方式是用规定的引燃源接触试样,观察燃烧行为:是否持续燃烧、燃烧多久、蔓延多远、有无熔滴。
要注意的是面料与填充材料是一起考察的。 面料本身阻燃但填充物易燃时,整体仍不安全;反过来也存在。所以试验通常用面料加填充的组合试样,而不是单独测面料。
还有一点:阻燃性能可能随清洗而下降。 如果阻燃靠后整理获得,多次清洗后整理剂流失,性能会衰减。这种情况下应当做清洗后的复测。
耐磨与其他物理性能
| 性能 | 为什么重要 | 常见问题 |
|---|---|---|
| 耐磨 | 转移、摩擦造成磨损 | 座面前缘、扶手处先磨破 |
| 抗撕裂 | 局部破损后是否扩展 | 小口子迅速撕大 |
| 抗起球 | 影响外观与舒适 | 摩擦部位起球明显 |
| 色牢度 | 掉色污染衣物、外观劣化 | 汗渍、摩擦、光照导致 |
| 透气与透湿 | 影响接触面微气候 | 密不透气导致闷热 |
| 尺寸稳定 | 清洗后是否变形 | 缩水导致套不上 |
耐磨的薄弱位置是可以预判的:座面前缘(转移时摩擦)、靠背两侧(与推手接触)、扶手(手肘长期摩擦)。这些位置可以考虑局部加强或者用更耐磨的材料。
清洁消毒的影响
机构使用的轮椅需要定期清洁消毒,这对面料是严苛条件:
消毒剂可能使面料褪色、变硬、强度下降;反复高温清洗会加速老化;某些涂层或复合结构可能分层。
所以面向机构市场的产品,应当按实际的清洁方式做耐受性验证: 按说明书规定的清洁剂和频次反复处理,之后重新测量强度、色牢度、阻燃性能。
验证结果应当反映到说明书——允许用什么清洁剂、不能用什么、清洁频次的建议。写得含糊,使用者会用手头方便的清洁剂,结果面料提前损坏。
与皮肤接触的考虑
面料直接接触皮肤,所以还涉及生物相容性方面的考虑:刺激性、致敏性。对于长时间接触的部位(座面、靠背),这一项不应当被跳过。
另外,面料的化学整理剂(阻燃剂、抗菌剂、防污整理)是潜在的刺激源。做生物相容性评价时,试样应当是经过全部整理工序的最终状态,而不是坯布。
选型上的权衡
把主要的权衡关系列出来:
阻燃性能与手感透气性;耐磨性与柔软度;防水防污与透气性;成本与综合性能;清洁耐受性与舒适性。
判断依据应当是使用场景:机构使用优先考虑清洁耐受和耐磨;居家长时间使用优先考虑透气和舒适;户外使用要考虑耐光照和防水。没有一种面料适合所有场景。
面套的结构设计
坐垫面套的结构对性能影响不小,几个常见问题:
拉链位置。 拉链如果在受压区域,会形成硬点。应当设计在侧面或后部。
接缝走向。 接缝处较硬,走向应当避开骨性突起对应的位置。
面料的拉伸方向。 双向拉伸的面料贴合性好;不拉伸的面料会在坐垫变形时产生张力,反而增加局部压力,这个现象叫做吊床效应。
防水层的位置。 防水膜如果在面料内侧且不透气,会使接触面闷热。可以考虑透气防水材料。
更换的便利性。 面套是消耗品,应当便于拆洗和更换,并且能单独购买。
标识与信息
面料相关的信息应当在产品上或说明书中体现:
材料成分;清洁与消毒的方法和限制;是否可机洗、水温上限;是否可烘干;更换件的规格与订购信息;以及阻燃性能的相关信息(如适用)。
其中清洁限制最应当醒目标注。 使用者看不到这条信息时,默认会用常规方式处理,而常规方式可能损坏面料或破坏阻燃性能。建议在面套上缝制永久标签,而不只是写在说明书里——说明书容易丢,标签跟着产品走。
测试试样的准备
面料测试对试样有具体要求,准备不当会影响结果:
取样位置。 应当从实际生产的面料上取,且避开边缘。不同批次的面料可能有差异,必要时多批取样。
试样的状态。 需要按标准规定的条件预调湿,因为纺织材料的强度受含湿量影响明显。这一步省略会导致结果偏差。
试样数量。 纺织材料的离散性较大,单个试样的结果代表性不足,通常需要多个试样取平均。
方向性。 机织面料的经向和纬向性能不同,测试时要分别取样并注明方向。针织面料还要考虑线圈方向。
这几点如果没控制,同一块面料在不同实验室测出不同结果是很正常的,而问题往往出在试样准备上而不是设备上。
我们的做法
做面料相关测试时,我们建议用最终状态的试样——经过全部整理工序、并且按实际结构组合(面料加填充)。单独测面料的数据,反映不出整体表现。
对于面向机构市场的产品,建议补做清洁消毒耐受性验证,并在之后复测阻燃和强度。这项数据既支撑说明书里的清洁指引,也能在采购方比较时体现差异。
有需要可以把面料规格和使用场景发过来一起确定测试项目,或者直接联系:132 4819 8029。检测能力见服务介绍,产品分类见手动轮椅检测与电动轮椅检测,标准信息见标准查询。
English version
Conclusion. Textiles on a wheelchair, covering the seat, backrest, cushion covers and armrest pads, look like trim while carrying two sets of requirements. Safety, principally flammability, matters because users are largely unable to move quickly and self-evacuation during a fire is difficult, so the burning behaviour of the fabric bears directly on escape time. Durability covers abrasion resistance, tear strength, pilling, colourfastness and tolerance of cleaning and disinfection. The two sets often conflict: flame-retardant treatment can affect handle and breathability, highly abrasion-resistant materials tend to be stiffer and less breathable, and soft comfortable materials tend to wear quickly. Fabric selection is therefore another balance.
Flammability: purpose and testing. The requirement addresses a specific scenario: a seated user encountering an ignition source such as a cigarette or naked flame, and whether the fabric burns and spreads rapidly. Testing applies a specified ignition source to a specimen and observes burning behaviour, including whether burning is sustained, for how long, how far it spreads and whether molten drips form.
Note that fabric and filling are assessed together. Flame-retardant fabric over flammable filling is still unsafe, and the reverse also occurs, so testing normally uses a composite specimen of fabric and filling rather than fabric alone. Note also that flammability performance can decline with laundering: where flame retardance comes from a finishing treatment, repeated washing depletes it, and retesting after washing is then appropriate.
Abrasion and other physical properties. Abrasion resistance matters because transfers and rubbing wear the fabric, with the seat front edge and armrests wearing first. Tear strength determines whether a small puncture propagates. Pilling affects appearance and comfort at rubbing points. Colourfastness affects whether dye transfers to clothing and how appearance holds up against perspiration, rubbing and light. Breathability and moisture transmission affect the microclimate at the interface. And dimensional stability determines whether covers still fit after washing.
Wear locations are predictable: the front edge of the seat where transfers cause rubbing, the sides of the backrest where push handles contact, and armrests where elbows rest. Local reinforcement or more abrasion-resistant material can be considered for these.
Effects of cleaning and disinfection. Institutional chairs are cleaned and disinfected regularly, which is demanding on fabric: disinfectants can fade, stiffen and weaken it, repeated hot washing accelerates ageing, and some coatings or laminates may delaminate. Products for institutional markets should therefore be verified against the actual cleaning regime: repeated treatment with the specified agents at the specified frequency, followed by remeasurement of strength, colourfastness and flammability. The results should feed into the instructions, stating which cleaning agents are permitted, which are not, and the recommended frequency. Vague wording leads users to reach for whatever is at hand, and the fabric fails prematurely.
Skin contact. Fabric contacts skin directly, so biological considerations of irritation and sensitisation apply, and for prolonged-contact areas such as seat and backrest they should not be skipped. Note also that chemical finishes, including flame retardants, antimicrobials and soil-release treatments, are potential irritants, so specimens for biological evaluation should be in final finished condition rather than greige fabric.
Selection trade-offs. Flame retardance against handle and breathability. Abrasion resistance against softness. Water and soil resistance against breathability. Cost against overall performance. And cleaning tolerance against comfort. Judge by the use scenario: institutional use prioritises cleaning tolerance and abrasion resistance; prolonged domestic use prioritises breathability and comfort; outdoor use requires light and water resistance. No single fabric suits every scenario.
How we handle it. We suggest testing specimens in final condition, having been through all finishing operations, and assembled as in the product with fabric over filling. Data from fabric alone do not reflect assembled behaviour. For institutional products we suggest adding cleaning and disinfection tolerance verification with remeasurement of flammability and strength afterwards, which supports the cleaning guidance in the instructions and differentiates the product in procurement comparison.
Send us the fabric specification and intended use and we will define the test items. Phone or WeChat: +86 132 4819 8029.