WO2017177483A1 - 一种硅丝棉产品及其制备方法 - Google Patents

一种硅丝棉产品及其制备方法 Download PDF

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WO2017177483A1
WO2017177483A1 PCT/CN2016/081255 CN2016081255W WO2017177483A1 WO 2017177483 A1 WO2017177483 A1 WO 2017177483A1 CN 2016081255 W CN2016081255 W CN 2016081255W WO 2017177483 A1 WO2017177483 A1 WO 2017177483A1
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Prior art keywords
chemical fiber
silica gel
cotton
silicon silk
substrate
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PCT/CN2016/081255
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English (en)
French (fr)
Inventor
马汉永
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Guangdong Polysil Co Ltd
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Guangdong Polysil Co Ltd
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Priority to EP16898300.5A priority Critical patent/EP3444398A4/en
Publication of WO2017177483A1 publication Critical patent/WO2017177483A1/zh
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/643—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon in the main chain
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
    • C09D183/04—Polysiloxanes
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/693—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural or synthetic rubber, or derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/04—Polysiloxanes
    • C08G77/12—Polysiloxanes containing silicon bound to hydrogen
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/04—Polysiloxanes
    • C08G77/20—Polysiloxanes containing silicon bound to unsaturated aliphatic groups
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material

Definitions

  • the invention relates to a silicon silk cotton product and a preparation method thereof, and belongs to the technical field of daily consumer goods manufacturing.
  • the amount of silicone treatment agent used in this technology is small, generally less than 10% by weight of the chemical fiber material
  • the silicone treatment agents in this technology are all reacted with chemical fiber materials.
  • the silicone treatment agents themselves do not crosslink each other, and they do not form an elastic silica gel layer.
  • the above chemical fiber treatment technology has no obvious help for solving the problem of poor rebound of chemical fiber products and deformation of long-term use.
  • the present invention has been developed based on the deficiencies of the above products and the deficiencies of the prior art.
  • the object of the present invention is to overcome the deficiencies of the prior art and provide an environmentally friendly, lightweight, high physical property, high gas permeability silicon silk cotton product.
  • Another object of the present invention is to provide a method of preparing the above-described silicon silk cotton product.
  • a silicon silk cotton product characterized by comprising a network structured fibril substrate which is shaped by compression or weaving of chemical fiber fibers, wherein the chemical fiber cotton substrate has a silica gel layer coated on the surface of the chemical fiber.
  • the silica gel layer of the present invention fills a portion of the mesh of the sealed fibril substrate.
  • the micro-fleece filaments on the surface of chemical fiber will block air circulation (the same principle as cotton insulation), which is the main reason for the heat dissipation of existing chemical fiber products.
  • the silica gel solution of the invention enters the chemical fiber material, the microvilli filaments on the surface of the chemical fiber material are combed and bonded, the fine mesh holes are blocked and bonded, and the larger mesh holes are smooth and have no microvilli, so the gas permeable effect is obtained. improve. After this treatment, the heat dissipation of the product is greatly improved.
  • the weight ratio of the chemical fiber cotton substrate to the silica gel layer in the present invention is 1:0.2-4.
  • the weight ratio of the chemical fiber cotton substrate to the organic silica gel layer in the present invention is more preferably 1: (0.3 to 3).
  • the weight of the silica gel layer refers to the weight of the rubber layer after the liquid silicone gel is solidified and formed. If the weight of the silica gel layer is less than 20% of the weight of the filament, the silica gel can only be bonded to the chemical fiber because the amount of the silica gel is too small, and the silica gel layer can only crosslink into a network structure, and the silica gel layer can only have the hydrophobic property of the product. Can not provide resilience and recovery to the product. If the weight of the silica gel layer exceeds 4 times the weight of the chemical fiber material, it is easy to block the gas permeable network structure of the fibril yarn due to too much silica gel, and the gas permeability of the product is lowered.
  • the silica gel layer in the present invention is obtained by infiltrating the chemical fiber cotton substrate with an addition liquid silicone rubber (hereinafter referred to as silica gel) having a Shore hardness of 15 to 70 degrees. This hardness is the hardness of the silica gel after curing.
  • the silica gel is a blend of vinyl silicone oil, reinforcing material, hydrogen silicone oil and platinum.
  • the invention selects silica gel of different hardness to treat the chemical fiber cotton substrate, and under the same silica gel dosage condition, silicon wool cotton products with different hardness and resilience can be obtained.
  • the silica gel selected by the invention can simultaneously crosslink the hydrogen-containing group in the silica gel and the hydroxyl group on the surface of the chemical fiber by platinum catalysis during self-curing crosslinking, so that the two elastomers are tightly combined and combined into one. And the resilience of the network structure of the silica gel layer formed by this reaction is the best, and Provide better support and resilience to the product.
  • the silica gel in the present invention has an operating viscosity of ⁇ 150 mPa.s when the chemical fiber cotton substrate is impregnated, and the silica gel can be diluted with a solvent or emulsified with water to an operating viscosity.
  • the silica gel solution with a viscosity of ⁇ 150 mPa ⁇ s can uniformly enter the network structure of the chemical fiber material, and after the solvent or water is volatilized, the silica gel molecular chain itself shrinks and adheres to the chemical fiber material, and does not block the vent hole.
  • the viscosity is too large, the silica gel solution blocks the mesh, making it difficult to uniformly penetrate into the network structure of the chemical fiber, and it is not uniformly attached to all the fibers.
  • the invention adopts a specific viscosity silica gel solution, infiltrates the chemical fiber matrix, and then makes the silica gel solution enter the product interior, and a silica gel layer is adhered between the inner and outer chemical fiber surface and the network structure of the product, and the vinyl in the silica gel itself.
  • the silicone oil and the hydrogen-containing silicone oil are catalytically crosslinked by platinum to form a network elastic structure.
  • the present invention adjusts the uniformity of silica gel distribution in the product by adjusting the operating viscosity of the silica gel solution.
  • the chemical fiber fiber is shaped into a desired product shape by compression or weaving to obtain a chemical fiber cotton substrate;
  • the silica gel is diluted with a solvent or emulsified with water into a silica gel solution of suitable operating viscosity, and then the chemical fiber cotton substrate is infiltrated in a silica gel solution to uniformly pass the silica gel solution into the inside and outside of the shaped cotton fiber matrix;
  • the excess silica gel solution in the pores is discharged by extrusion, and only a proper amount of silicone is attached to the surface of the chemical fiber fiber, and then the product is heated to volatilize the solvent or water to solidify and crosslink the silica gel to form a silicone network.
  • the elastic structure can be used.
  • silica gel solution is carried out by a press roll or a die extrusion Pressing method to treat products that have been infiltrated with silica gel solution but have not been thermally cured, control the amount of silica gel in the chemical fiber structure according to the degree of extrusion, and adjust product resilience and permeability, hardness and other product specifications.
  • the present invention has the following advantages:
  • the invention adopts a cross-border design and manufacturing process, so that the silicon silk cotton product has two layers of completely synchronous mesh elastic structure, and the chemical fiber elastic structure provides sufficient strength to the silica gel structure, so that the tensile and tearing strength thereof is not high.
  • the excellent elastic structure of the silicone rebound is not easy to break, and the elastic structure of the silicone provides sufficient rebound and setting stability for the chemical fiber structure.
  • the invention solves the defects of long-term compression, long-term use and easy deformation of chemical fiber products after washing.
  • the liquid silicone rubber penetrates into the network structure of the fiber cotton matrix, adheres to all the chemical fiber fibers, and solidifies into a silica gel elastomer, thereby effectively improving the resilience and long-lasting deformation property of the chemical fiber cotton.
  • the silica gel layer fills a part of the mesh which is sealed with the chemical fiber cotton substrate, that is, a small mesh, while retaining the ventilation of the large mesh, reducing the heat retention of the meshed cotton fiber substrate, and improving the gas permeability.
  • FIG. 1 is a cross-sectional structural view showing a single-layered network structure of the present invention.
  • a silicon silk cotton product comprises a chemical fiber cotton substrate 2 which is formed by compressing or weaving a textured structure of a chemical fiber 1 , and the inner and outer portions of the chemical fiber cotton substrate 2 are coated on the surface of the chemical fiber 1 Silicone layer 3.
  • the chemical fiber cotton substrate 2 is compressed into a network structure by a plurality of chemical fiber fibers 1 and shaped into a desired shape, and then immersed in a silica gel solution to permeate it.
  • the mesh structure covers all the chemical fiber 1 and forms a silica gel layer 3 after curing, so that the chemical fiber cotton substrate 2 becomes a silicon silk cotton product.
  • the network structure coated with the silica gel layer 3 and the network structure of the chemical fiber cotton substrate 2 form a completely synchronized double-network elastic structure, but it is not a laminated double-mesh structure, and the silica gel layer 3 is firmly adhered to each chemical fiber.
  • the surface layer, the junction of the chemical fiber 1 is bonded, so that the chemical fiber cotton substrate 2 becomes the skeleton of the silicon silk cotton, and the silica gel layer 3 imparts a high degree of elasticity to the skeleton, and the two intersect to improve the resilience and deformation resistance of the silicon silk cotton product.
  • the plurality of chemical fiber 1 is compressed into a mesh structure, and the large mesh 21 and the small mesh 22 are randomly formed.
  • the silica gel layer 3 in the chemical fiber cotton substrate 2 fills a part of the mesh of the sealed cotton fiber substrate 2, and is filled with a sealed mesh.
  • the hole is smaller than the mesh which is not filled and sealed, that is, the small mesh 22 is filled and sealed, and the large mesh 21 is still ventilated and ventilated, so that the heat retention of the small mesh in the mesh structure can be reduced, and the large mesh in the mesh structure is retained.
  • the breathability thereby improving the breathability of the silicon silk product.
  • the invention is prepared by the following method:
  • the chemical fiber 1 (ie, the chemical fiber material) is shaped into a desired product shape by compression or weaving, at which time the network structure of the chemical fiber cotton substrate 2 of the product has been established;
  • silica gel addition liquid silicone rubber
  • a solvent or emulsified with water into a silica gel solution of suitable operating viscosity
  • the chemical fiber cotton substrate 1 is immersed in a silica gel solution to uniformly pass the silica gel solution into the shaped cotton fiber matrix.
  • the inner and outer parts of 1 are then discharged by extrusion to remove excess silica gel solution in the pores, and only a proper amount of silica gel is attached to the surface of the chemical fiber 1 and then the product is heated to volatilize the solvent or water, and the silica gel is solidified and crosslinked.
  • the mesh elastic structure silica gel layer can be used.
  • the mesh elastic structure of the silica gel layer is identical to the mesh elastic structure of the original compression-formed chemical fiber cotton substrate.
  • the calender roll grinds the pillow, drains the excess silicone solution, and adjusts the remaining amount of the silica solution by adjusting the crushing pressure.
  • the compression deformation test method (according to ISO1856 method A): compress the sample by 50%, compress it at a temperature of 70 ° C for 22 hours, take it out, and place it at room temperature for 30 minutes, then calculate it. The amount of deformation.
  • Example 2 The preparation conditions and parameters of Example 2 were the same as those in Example 1.
  • the hardness of the liquid silicone added was selected to be Shore A: 50 degrees.
  • the test method was also the same as in Example 1. The results are shown in Table 2:
  • Example 3 The preparation conditions and parameters of Example 3 were the same as those of Example 1.
  • the hardness of the liquid silicone for addition molding was selected to be Shore A: 70 degrees.
  • the test method was also the same as that in Example 1. The results are shown in Table 3:
  • Example 4 The preparation conditions and parameters of Example 4 were the same as those in Example 1, except that the operating viscosity of the silica gel solution was 80 mPa ⁇ s (the hardness of the silica gel was Shore A: 20 degrees), and the test method was also the same as in Example 1, and the results are shown in Table 4. Shown as follows:
  • Example 5 The preparation conditions and parameters of Example 5 were the same as those of Example 1, except that the operating viscosity of the silica gel solution was 150 mPa ⁇ s (the hardness of the silica gel was Shore A: 20 degrees), and the test method was also the same as in Example 1, and the results are shown in Table 5. Shown as follows:
  • Example 6 The preparation conditions and parameters of Example 6 were the same as those of Example 1, except that the weight of the silica gel layer was changed, and the test method was the same as that of Example 1, and the results are shown in Table 6:
  • Pillow 1 180g 12 degrees 8% 55%
  • Pillow 2 216g 12 degrees 12% 35% difference +36g +0 degrees +4% -20%
  • Example 7 The preparation conditions and parameters of Example 7 were the same as those of Example 1, except that the weight of the silica gel layer was changed, and the test method was the same as that of Example 1, and the results are shown in Table 7:
  • Example 8 The preparation conditions and parameters of Example 8 were the same as those of Example 1, except that the weight of the silica gel layer was changed, and the test method was the same as that of Example 1, and the results are shown in Table 8:
  • Example 9 The preparation conditions and parameters of Example 9 were the same as those of Example 1, except that the weight of the silica gel layer was changed, and the test method was the same as that of Example 1, and the results are shown in Table 9:
  • Example 10 The preparation conditions and parameters of Example 10 were the same as those of Example 1, except that the weight of the silica gel layer was changed, and the test method was the same as that of Example 1, and the results are shown in Table 10:

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  • Life Sciences & Earth Sciences (AREA)
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  • Wood Science & Technology (AREA)
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Abstract

本发明公开了一种硅丝棉产品及其制备方法，该硅丝棉产品包括由化纤纤维通过压缩或编织定型的网状结构化纤棉基体，所述的化纤棉基体内、外部渗有包覆在所述化纤纤维表面的硅胶层。化纤棉基体与硅胶层的重量比为1：0.2～4。本发明中液体硅橡胶深入化纤棉基体内的网状结构中，附着于所有的化纤纤维，固化成硅胶弹性体后有效提高了化纤棉的回弹性和持久不变形性能。本发明中，硅胶层填充密封了化纤棉基体的部分网孔即：小网孔，而保留了大网孔的通风性，降低了网状化纤棉基体的保温性，而提高了其透气性。

Description

一种硅丝棉产品及其制备方法 【技术领域】
本发明涉及一种硅丝棉产品及其制备方法，属于日用消费品制造技术领域。
【背景技术】
现在市面上很多使用各种化学纤维材料(化纤)制造的产品，大多的工艺是先将不同特性的化学纤维丝材料共配，然后通过压缩、定型形成不同形状与特性的产品。例如：内衣罩杯、枕头、床垫等。这类产品的优点是：环保、轻质(比重仅相当于普通海绵的30-50％)、高透气(透气性比海绵高3-5倍)，可以暴晒杀菌等优点。在众多消费者逐步认识到聚氨酯海绵对人体的危害后，人们越发的希望选择用化纤材料制造的弹性产品。
但化纤材料通过压缩、定型而成的产品的缺点也是同样突出：因化纤仅仅是通过压缩，然后通过高温定型而成，没有化学反应固定，仅通过化纤的压缩恢复性来保型，故此类产品的回弹性不好，经长时间压缩或长期使用后很容易变形，例如用聚酯纤维制造的床垫产品，使用一年后一般都会发生变形，无法恢复，失去使用价值。且经过水洗后化纤材料更容易散开，变形且失去支撑回弹力。例如使用聚酯纤维制作的内衣罩杯俗称直立棉罩杯，经水洗几次后很快发生变形，失去使用价值。
市场上有很多经过有机硅处理的化纤材料与布料等，也有很多科研报告介绍使用有机硅处理化纤材料的技术，但这些产品与技术都是使用含有氨基、羟基等反应基团的硅油或硅烷偶联剂，在化纤拉丝与制造的过程中对化纤表面进行处理，让处理剂中的氨基、羟基等反应基团与化纤材料表面的羟基等基团进行反应，提高其憎水性，减少化纤材料表面的摩擦力，从而提升化纤材料的触感与回弹性。这类处理技术的特征是：
1、此技术中的有机硅处理剂使用量很少，一般低于化纤材料重量的10％；
2、此技术中的有机硅处理剂都是与化纤材料反应，有机硅处理剂自身没有互相交联，更没能形成弹性的硅胶层。
以上化纤的处理技术对于解决化纤产品的回弹不好与长久使用的变形问题没有明显的帮助。
本发明正是基于以上产品的不足与现有技术的不足而产生的。
【发明内容】
本发明的目的是克服现有技术的不足，提供一种环保、轻质、高物性、高透气性的硅丝棉产品。
本发明的另一目的是提供一种上述硅丝棉产品的制备方法。
本发明为实现上述目的，采用以下技术方案：
一种硅丝棉产品，其特征在于包括由化纤纤维通过压缩或编织定型的网状结构化纤棉基体，所述的化纤棉基体内、外部渗有包覆在所述化纤纤维表面的硅胶层。
本发明中的硅胶层填充密封化纤棉基体的部分网孔。化纤纤维表面的微绒毛细丝会阻滞空气流通(与棉花保温的原理相同)，是导致现有化纤产品热量不容散发的主要原因。本发明硅胶溶液进入化纤材料的过程中，会将化纤材料表面的微绒毛细丝梳理粘结，细小的网孔被堵塞粘结，较大的网孔则通畅并且无微绒毛，因此透气效果得到提高。经此处理后产品的散热性得到很大的提升。
本发明中的化纤棉基体与硅胶层的重量比为1：0.2～4。
本发明中的化纤棉基体与有机硅胶层的重量比进一步优选为1：(0.3～3)。所述的硅胶层的重量是指液体硅胶固化成形后的胶层重量。若硅胶层的重量低于纤维丝重量的20％，则因为硅胶量太少，硅胶仅能与化纤纤维粘结，而自身无法交联成网状结构，硅胶层仅能使产品具备憎水特性，无法给产品提供回弹性与恢复性。若硅胶层的重量超过化纤材料重量的4倍，则会因为硅胶太多，很容易将原纤维丝的透气网状结构堵塞，使产品的透气性降低。
本发明中的硅胶层由邵氏硬度15～70度的加成型液体硅橡胶(以下简称硅胶)浸润所述的化纤棉基体后固化而成。该硬度为硅胶固化后的硬度。所述的硅胶为乙烯基硅油、补强材料、含氢硅油和铂金的共混物。本发明选择不同硬度的硅胶来处理化纤棉基体，在相同硅胶用量的条件下，可以得到不同硬度与回弹性的硅丝棉产品。本发明选用的硅胶在自身固化交联时能同时将硅胶中的含氢基团与化纤表面的羟基基团通过铂金催化进行交联反应，让这两个弹性体紧密结合，合二为一。且此反应形成的硅胶层的网状结构的回弹性最好，能 给产品提供更好的支撑与回弹力。
本发明中的硅胶浸润所述化纤棉基体时的操作粘度≤150mPa.s，该硅胶可以通过溶剂稀释或用水乳化至操作粘度。操作粘度≤150mPa.s的硅胶溶液才能均匀进入化纤材料的网状结构中，且在溶剂或水挥发后硅胶分子链自身产生收缩后附着在化纤材料上，不会堵塞透气孔。粘度过大时，则硅胶溶液会堵塞网孔，使其不容易均匀渗透入化纤纤维的网状结构中，无法均匀的附着于所有的纤维上。
本发明通过特定粘度的硅胶溶液，浸润化纤棉基体后，使硅胶溶液进入产品内部，在产品的内、外部的化纤纤维表面及网状结构之间附着一层硅胶层，硅胶自身中的乙烯基硅油和含氢硅油通过铂金催化交联形成网状弹性结构。本发明通过调节硅胶溶液的操作粘度来调整产品中硅胶分布的均匀性。
本发明硅丝棉产品的制备方法，其特征在于包括以下步骤：
a、先将化纤纤维通过压缩或编织定型成需要的产品形状，得化纤棉基体；
b、将硅胶用溶剂稀释或用水乳化成合适操作粘度的硅胶溶液，然后将化纤棉基体浸润在硅胶溶液中使硅胶溶液均匀进入已定型好的化纤棉基体的内、外部；
c、然后通过挤压的方式将孔隙中多余的硅胶溶液排出，仅余适量的有机硅附着于化纤纤维表面，再将产品加热，将溶剂或水挥发，使硅胶固化交联形成有机硅的网状弹性结构即可。
其中挤压去除多余加成型液体硅胶溶液时用压辊挤压或模具挤 压的方法来处理已经浸润了硅胶溶液但还没有进行热固化的产品，根据挤压的程度来控制化纤结构中硅胶的量，调整产品的回弹性与透气性、硬度等产品指标。
与现有技术相比，本发明有如下优点：
本发明通过一种跨界设计与制造工艺，让硅丝棉产品拥有了两层完全同步的网状弹性结构，化纤弹性结构给硅胶结构提供足够的强度，让本身拉伸与撕裂强度不高但回弹优异的硅胶弹性结构不容易破损，硅胶弹性结构给化纤结构提供足够的回弹与定型稳定性。解决了化纤产品长时间压缩、长期使用、水洗后容易变形的缺点。
本发明中液体硅橡胶深入化纤棉基体内的网状结构中，附着于所有的化纤纤维，固化成硅胶弹性体后有效提高了化纤棉的回弹性和持久不变形性能。本发明中，硅胶层填充密封了化纤棉基体的部分网孔即：小网孔，而保留了大网孔的通风性，降低了网状化纤棉基体的保温性，而提高了其透气性。
【附图说明】
图1是本发明单层网状结构的剖视结构示意图。
【具体实施方式】
以下结合说明书附图对本发明做进一步更详细的说明。
如图1所示，一种硅丝棉产品，包括由化纤纤维1通过压缩或编织定型的网状结构的化纤棉基体2，该化纤棉基体2内、外部渗有包覆在化纤纤维1表面的硅胶层3。化纤棉基体2由许多化纤纤维1压缩成网状结构，并定型为所需的形状，然后浸泡硅胶溶液使其渗透入 网状结构并包覆所有的化纤纤维1，固化后形成硅胶层3，使化纤棉基体2成为硅丝棉产品。
包覆有硅胶层3的网状结构与化纤棉基体2的网状结构形成完全同步的双网弹性结构，但又不是层叠式的双网结构，硅胶层3牢牢粘附在每条化纤纤维1表层，粘结化纤纤维1的交结处，使得化纤棉基体2成为硅丝棉的骨架，硅胶层3赋予骨架高度的弹性，二者交叉提高硅丝棉产品的回弹性和耐变形性。
多个化纤纤维1压缩成的网状结构，无规则形成大网孔21和小网孔22，化纤棉基体2内的硅胶层3填充密封化纤棉基体2的部分网孔，被填充密封的网孔小于未被填充密封的网孔，即：小网孔22被填充密封，大网孔21仍然通风透气，这样可以降低网状结构中小网孔的保温性，而保留网状结构中大网孔的透气性，从而提高硅丝棉产品的透气性。
本发明是通过以下方法制备的：
首先，将化纤纤维1(即化纤材料)通过压缩或编织定型成需要的产品形状，此时产品的化纤棉基体2的网状结构已经确立；
然后，将加成型液体硅橡胶(以下简称硅胶)用溶剂稀释或用水乳化成合适操作粘度的硅胶溶液，然后将化纤棉基体1浸润在硅胶溶液中使硅胶溶液均匀进入已定型好的化纤棉基体1的内、外部，然后通过挤压的方式将孔隙中多余的硅胶溶液排出，仅余适量的硅胶附着于化纤纤维1表面，再将产品加热，使溶剂或水挥发，硅胶固化交联后形成网状弹性结构硅胶层即可。
此硅胶层的网状弹性结构与原有的经过压缩定型的化纤棉基体的网状弹性结构完全相同。
实施例1：
a、压缩化纤纤维成密度为6kg/m3，厚度为6cm，回弹力8％的化纤板材，将化纤板材裁切至合适的尺寸，放入温度为190℃的一个枕头的模具中，用平板硫化机压制5分钟后取出冷却，定型成枕头的形状。(1号枕)
b、将定型好的1号枕浸入操作粘度为20mPa.S的硅胶溶液(硅胶的硬度为邵氏A:20度)中，1分钟后取出，放置5分钟，让多余的溶液流出，再用压延辊碾压枕头，排出多余的有机硅溶液，通过调整碾压力大小调整硅胶溶液的剩余量。
c、将处理过的枕头放入烘箱中，120℃烘烤30分钟取出即可。(2号枕)
在实验过程中，对1号枕和2号枕进行性能测试，结果如表1所示：
表1：
类别 重量 硬度(邵F) 回弹力 压缩变形
1号枕 180g 12度 8％ 55％
2号枕 300g 14度 18％ 22％
差别 +120g +2度 +10％ -33％
其中压缩变形测试方法(依据ISO1856方法A)：将试样压缩50％，温度70℃条件下压缩22小时后取出，常温放置30分钟后，计算其 变形量。
实施例2：
实施例2的制备条件与参数均与实施例1相同，选择加成型液体硅胶的硬度为邵氏A:50度，测试方法也同实施例1，结果如表2所示：
表2：
类别 重量 硬度(邵F) 回弹力 压缩变形
1号枕 180g 12度 8％ 55％
2号枕 300g 17度 25％ 15％
差别 +120g +5度 +17％ -40％
实施例3：
实施例3的制备条件与参数均与实施例1相同，选择加成型液体硅胶的硬度为邵氏A:70度，测试方法也同实施例1，结果如表3所示：
表3：
类别 重量 硬度(邵F) 回弹力 压缩变形
1号枕 180g 12度 8％ 55％
2号枕 300g 21度 20％ 25％
差别 +120g 9度 +12％ -30％
实施例4：
实施例4的制备条件与参数均与实施例1相同，只是硅胶溶液的操作粘度为80mPa.S(硅胶的硬度为邵氏A:20度)，测试方法也同实施例1，结果如表4所示：
表4：
类别 重量 硬度(邵F) 回弹力 压缩变形
1号枕 180g 12度 8％ 55％
2号枕 370g 16度 23％ 20％
差别 +190g +4度 +15％ -35％
实施例5：
实施例5的制备条件与参数均与实施例1相同，只是硅胶溶液的操作粘度为150mPa.S(硅胶的硬度为邵氏A:20度)，测试方法也同实施例1，结果如表5所示：
表5：
类别 重量 硬度(邵F) 回弹力 压缩变形
1号枕 180g 12度 8％ 55％
2号枕 480g 18度 22％ 16％
差别 +300g +6度 +18％ -39％
实施例6：
实施例6的制备条件与参数均与实施例1相同，只是硅胶层重量改变，测试方法同实施例1，结果如表6所示：
表6：
类别 重量 硬度(邵F) 回弹力 压缩变形
1号枕 180g 12度 8％ 55％
2号枕 216g 12度 12％ 35％
差别 +36g +0度 +4％ -20％
实施例7：
实施例7的制备条件与参数均与实施例1相同，只是硅胶层重量改变，测试方法同实施例1，结果如表7所示：
表7：
类别 重量 硬度(邵F) 回弹力 压缩变形
1号枕 180g 12度 8％ 55％
2号枕 234g 13度 13％ 30％
差别 +54g +1度 +5％ -25％
实施例8：
实施例8的制备条件与参数均与实施例1相同，只是硅胶层重量改变，测试方法同实施例1，结果如表8所示：
表8：
类别 重量 硬度(邵F) 回弹力 压缩变形
1号枕 180g 12度 8％ 55％
2号枕 540g 20度 30％ 14％
差别 +360g +8度 +22％ -41％
实施例9：
实施例9的制备条件与参数均与实施例1相同，只是硅胶层重量改变，测试方法同实施例1，结果如表9所示：
表9：
类别 重量 硬度(邵F) 回弹力 压缩变形
1号枕 180g 12度 8％ 55％
2号枕 720g 23度 34％ 10％
差别 +540g +11度 +26％ -45％
实施例10：
实施例10的制备条件与参数均与实施例1相同，只是硅胶层重量改变，测试方法同实施例1，结果如表10所示：
表10：
类别 重量 硬度(邵F) 回弹力 压缩变形
1号枕 180g 12度 8％ 55％
2号枕 360g 15度 22％ 20％
差别 +180g +3度 +14％ -35％

Claims (10)

  1. 一种硅丝棉产品，其特征在于：包括由化纤纤维通过压缩或编织定型的网状结构化纤棉基体，所述的化纤棉基体内、外部渗有包覆在所述化纤纤维表面的硅胶层。
  2. 根据权利要求1所述的一种硅丝棉产品，其特征在于所述硅胶层填充密封化纤棉基体的部分网孔。
  3. 根据权利要求1所述的一种硅丝棉产品，其特征在于所述的化纤棉基体与硅胶层的重量比为1：0.2～4。
  4. 根据权利要求1所述的一种硅丝棉产品，其特征在于所述的化纤棉基体与硅胶层的重量比为1：0.3～3。
  5. 根据权利要求1-4中任一项所述的一种硅丝棉产品，其特征在于所述的硅胶层由邵氏硬度15～70度的加成型液体硅橡胶浸润所述的化纤棉基体后固化而成。
  6. 根据权利要求5所述的一种硅丝棉产品，其特征在于所述的加成型液体硅橡胶为乙烯基硅油、补强材料、含氢硅油和铂金的共混物。
  7. 根据权利要求6所述的一种硅丝棉产品，其特征在于所述的加成型液体硅橡胶浸润所述化纤棉基体时的操作粘度≤150mPa.s。
  8. 根据权利要求7所述的一种硅丝棉产品，其特征在于所述的加成型液体硅橡胶通过溶剂稀释或用水乳化至操作粘度。
  9. 一种权利要求8所述硅丝棉产品的制备方法，其特征在于包 括以下步骤：
    a、先将化纤纤维通过压缩或编织定型成需要的产品形状，得化纤棉基体；
    b、将加成型液体硅橡胶用溶剂稀释或用水乳化成合适操作粘度的硅胶溶液，然后将化纤棉基体浸润在硅胶溶液中使硅胶溶液均匀进入已定型好的化纤棉基体的内、外部；
    c、然后通过挤压的方式将孔隙中多余的硅胶溶液排出，仅余适量的硅胶附着于化纤纤维表面，再将产品加热，使溶剂或水挥发，硅胶固化交联形成网状弹性结构硅胶层即可。
  10. 根据权利要求9所述的制备方法，其特征在于挤压去除多余硅胶溶液时用压辊挤压或模具挤压的方法。
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