WO2016165208A1 - 一种复合型硅胶马桶坐垫及其制备工艺 - Google Patents

一种复合型硅胶马桶坐垫及其制备工艺 Download PDF

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Publication number
WO2016165208A1
WO2016165208A1 PCT/CN2015/081378 CN2015081378W WO2016165208A1 WO 2016165208 A1 WO2016165208 A1 WO 2016165208A1 CN 2015081378 W CN2015081378 W CN 2015081378W WO 2016165208 A1 WO2016165208 A1 WO 2016165208A1
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Prior art keywords
silica gel
toilet seat
cushion
component
cushion bracket
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PCT/CN2015/081378
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English (en)
French (fr)
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谢方奎
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谢方奎
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Publication of WO2016165208A1 publication Critical patent/WO2016165208A1/zh

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K13/00—Seats or covers for all kinds of closets
    • A47K13/14—Protecting covers for closet seats
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/53—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston
    • B29C45/54—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston and plasticising screw

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  • the invention belongs to the field of sanitary ware, and particularly relates to a composite silicone toilet seat cushion and a preparation process thereof.
  • the toilet is an indispensable sanitary device in the daily life of modern people.
  • the toilet is composed of a toilet cover, a toilet seat cushion and a base.
  • the toilet seat cushion is directly in contact with human skin, and most of them are injection molded from plastic materials.
  • the disadvantages are as follows: 1. The human body feels cold when sitting on the toilet seat in winter; 2. The toilet seat cushion material is too hard and is not comfortable to sit. Third, when the toilet seat is lowered, the toilet seat cushion is easy to collide with the base, thereby emitting noise; Fourth, the plastic material is easy to yellow and aging, resulting in indecent appearance and degraded performance. Therefore, some toilet seats are made of polyurethane to overcome the above disadvantages.
  • the conventional polyurethane toilet seat cushion has poor adhesion to the seat cushion bracket, and not only the polyurethane material is expensive, the time is long and easy to peel off, the service life is short, and the second is molding, the process is complicated, and the steps are numerous. Undoubtedly increase the cost of use, thereby reducing the overall quality of the product.
  • the inventors have specially designed a composite silicone toilet seat cushion and a preparation process thereof, and the present invention is produced.
  • One of the objects of the present invention is to provide a composite silicone toilet seat cushion, which can save the use cost, increase the adhesion fastness of the product, improve the quality and comfort of the product, and meet the ergonomic requirements.
  • Another object of the present invention is to provide a process for preparing a composite silicone toilet seat cushion to optimize the processing technology and realize a composite molding of the silicone toilet seat cushion.
  • the utility model relates to a composite silicone toilet seat cushion, which comprises a surface coating layer, a positioning structure and a cushion bracket.
  • the surface coating layer is made of silica gel, and the surface coating layer is seamlessly coated on the outer surface of the cushion bracket by the positioning structure.
  • the positioning structure is an end portion of the surface covering layer integrally provided with a first turning portion and a first beam, the first turning portion is connected with the first beam, and the first beam extends upward to form a first hook structure, and the end of the cushion bracket
  • the upper side is integrally provided with a second beam, and the second beam extends downward to form a second hook structure, and the first hook structure and the second hook structure are engaged with each other.
  • a preparation process of a composite silicone toilet seat cushion which comprises the following steps:
  • Step 1 uniformly mixing the raw materials of the silica gel
  • Step 2 adding the silica gel raw material to the plasticizing system
  • Step 3 using industrial alcohol to clean the surface of the cushion bracket
  • Step 4 performing surface treatment on the cushion bracket, and blowing dust on the surface of the treated cushion bracket;
  • Step 5 placing the cleaned cushion bracket into the mold
  • Step 6 the silica gel raw material in the plasticizing system is fully plasticized, and is injected into the mold;
  • Step 7 After the product is solidified and cooled, the mold is opened and the product is taken out.
  • the silica gel raw material is injected into the mold under the conditions of a pressure of 100-180 Kg/cm 2 .
  • the silica gel raw material is plasticized under the condition that the screw rotation speed is 40-100 rpm.
  • the raw materials of the silica gel include: component A (base glue and catalyst) and component B (base glue, hydrogen-containing silicone oil and inhibitor), mass ratio of component B/component A is 1; component A and B The components are mixed at a temperature of 170 to 250 ° C.
  • the present invention has the following advantages:
  • the surface coating layer of the invention is coated on the outer surface of the cushion bracket, and on the basis of ensuring the comfort of the toilet seat cushion, the use cost of the material is reduced, the processing cost of the product is saved, and the marketing value is greatly increased;
  • the invention produces a composite silicone toilet seat by a composite forming process, which saves the process of secondary molding, and makes the whole process flow simpler and more convenient;
  • the invention adopts a processing process of composite molding, so that the surface coating layer is seamlessly coated on the cushion bracket through the positioning structure, thereby eliminating the delamination between the surface coating layer and the cushion bracket, and avoiding the weather being too cold, Overheating or frequent use causes the surface coating to be detached from the cushion bracket, which greatly increases the adhesion between the surface coating and the cushion bracket, and significantly improves the quality and comfort of the product.
  • Figure 1 is a bottom plan view of the present invention
  • FIG. 2 is a schematic structural view of a surface coating layer and a cushion support of the present invention
  • Figure 3 is a schematic view showing the structure of the present invention placed in a mold
  • Figure 4 is a schematic illustration of the polyurethane foaming process of the present invention.
  • the composite silicone toilet seat cover comprises a surface coating layer 1, a positioning structure and a cushion support 2, and the surface coating layer 1 is made of silica gel, and the surface coating layer 1 is provided.
  • the outer surface of the cushion bracket 2 is seamlessly wrapped by the positioning structure.
  • the positioning structure may be various. Specifically, the end portion of the surface covering layer 1 is integrally provided with the first turning portion 12 and the first beam 13 .
  • the first turning portion 12 is connected to the first beam 13 , and the first beam 13 extends upward.
  • Forming a first hook-like structure 11, the upper side of the end portion of the cushion bracket 2 is integrally provided with a second beam 22, and the second beam 22 extends downward to form a second hook-shaped structure 21, the first hook-shaped structure 11 and the second hook-shaped structure
  • the structures 21 are engaged with each other.
  • the cushion holder 2 has a plurality of materials, specifically, a plastic material, wood, or a metal material.
  • the plastic is preferably PP polypropylene, soft PVC polyvinyl chloride, ABS acrylonitrile-butadiene-styrene copolymer or urea formaldehyde.
  • PP polypropylene has good surface stiffness and scratch resistance, and there is no environmental stress cracking problem.
  • Soft PVC has good mechanical properties, high tensile strength and impact strength, and excellent dielectric properties.
  • ABS is a thermoplastic polymer structure with high strength, good toughness and easy processing. It has good formability, and the surface of the processed product is smooth and easy to dye and electroplate.
  • Urea-formaldehyde has low cost, light color, high hardness, oil resistance, mildew resistance, good insulation and temperature resistance, and has the advantages of environmental protection, non-toxicity and tastelessness.
  • the invention provides a process for preparing a composite silicone toilet seat cushion, which comprises the following steps:
  • Step 1 uniformly mixing the raw materials of the silica gel
  • Step 2 adding the silica gel raw material to the plasticizing system
  • Step 3 using industrial alcohol to clean the surface of the cushion bracket
  • Step 4 performing surface treatment on the cushion bracket, and blowing dust on the surface of the treated cushion bracket;
  • Step 5 placing the cleaned cushion bracket into the mold
  • Step 6 The silica gel raw material in the plasticizing system is plasticized sufficiently, and is injected into the mold; wherein the silica gel raw material is injected into the mold under the condition of a pressure of 100-180 Kg/cm 2 , and the screw rotation speed is 40-100 rpm. Plasticizing under the conditions
  • Step 7 After the product is solidified and cooled, the mold is opened and the product is taken out.
  • the silica gel of the present invention is plasticized and coated on the outer surface of the cushion support 2 in the mold 3, and it is not necessary to separately process the surface coating layer 1 and the cushion support 2, and it is not necessary to bond the two, that is, through one-time composite molding.
  • the processing method can produce a composite silicone toilet seat cushion, which eliminates the delamination between the surface coating layer 1 and the cushion support 2, and increases the adhesion fastness between the surface coating layer 1 and the cushion support 2, which is obtained. The performance of the product is beyond the reach of traditional processes.
  • the raw materials of the silica gel include: component A (base glue and catalyst) and component B (base glue, hydrogen-containing silicone oil and inhibitor), component B/group A
  • component A base glue and catalyst
  • component B base glue, hydrogen-containing silicone oil and inhibitor
  • the mass ratio of the fraction is 1; the components A and B are mixed and reacted at a temperature of 170 to 250 ° C to obtain a silica gel of this example.
  • the surface coating layer 1 made of the silica gel has the following performance indexes.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the A component is prepared from the following raw materials in parts by weight: 100 parts of vinyl silicone rubber, 25 parts of silica, 0.5 parts of catalyst; B component is 100 parts of vinyl silicone rubber, 25 parts of white carbon black, cross-linking 1 part of the agent, 0.5 part of the inhibitor, and a mass ratio of the B component/A component was 1.
  • a process for preparing a composite silicone toilet seat cushion which comprises the following steps:
  • Step 1 uniformly mixing the raw materials of the silica gel
  • Step 2 adding the silica gel raw material to the plasticizing system
  • Step 3 using industrial alcohol to clean the surface of the cushion bracket
  • Step 4 performing surface treatment on the cushion bracket, and blowing dust on the surface of the treated cushion bracket;
  • Step 5 placing the cleaned cushion bracket into the mold
  • Step 6 The silica gel raw material in the plasticizing system is fully plasticized and injected into the mold; wherein the silica gel raw material is injected into the mold under the condition of a pressure of 140 Kg/cm 2 and molded under the condition of a screw rotation speed of 60 rpm. At this time, the mold temperature was controlled at 185 °C.
  • Step 7 After the product is solidified and cooled, the mold is opened and the product is taken out.
  • Product test results are as follows:
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the A component is prepared from the following raw materials in parts by weight: 100 parts of vinyl silicone rubber, 40 parts of white carbon black, 1.0 part of catalyst; B part is 100 parts of vinyl silicone rubber, 40 parts of white carbon black, cross-linking 1.5 parts of the agent, 0.5 parts of the inhibitor, and a mass ratio of the B component/A component was 1.
  • a process for preparing a composite silicone toilet seat cushion which comprises the following steps:
  • Step 1 uniformly mixing the raw materials of the silica gel
  • Step 2 adding the silica gel raw material to the plasticizing system
  • Step 3 using industrial alcohol to clean the surface of the cushion bracket
  • Step 4 performing surface treatment on the cushion bracket, and blowing dust on the surface of the treated cushion bracket;
  • Step 5 placing the cleaned cushion bracket into the mold
  • Step 6 the silica gel raw material in the plasticizing system is fully plasticized, and is injected into the mold; wherein, the silica gel raw material is injected into the mold under the condition of a pressure of 160 Kg/cm 2 , and is molded under the condition that the screw rotation speed is 60 rpm. At this time, the mold temperature was controlled at 200 °C.
  • Step 7 After the product is solidified and cooled, the mold is opened and the product is taken out.
  • Product test results are as follows:
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • the A component is prepared from the following raw materials in parts by weight: 100 parts of vinyl silicone rubber, 45 parts of white carbon black, 1.5 parts of catalyst; B part is 100 parts of vinyl silicone rubber, 45 parts of white carbon black, cross-linking 2 parts of the agent, 1 part of the inhibitor, and the mass ratio of the B component/A component was 1.
  • a process for preparing a composite silicone toilet seat cushion which comprises the following steps:
  • Step 1 uniformly mixing the raw materials of the silica gel
  • Step 2 adding the silica gel raw material to the plasticizing system
  • Step 3 using industrial alcohol to clean the surface of the cushion bracket
  • Step 4 performing surface treatment on the cushion bracket, and blowing dust on the surface of the treated cushion bracket;
  • Step 5 placing the cleaned cushion bracket into the mold
  • Step 6 The silica gel raw material in the plasticizing system is fully plasticized and injected into the mold; wherein the silica gel raw material is injected into the mold under the condition of a pressure of 170 Kg/cm 2 , and is molded under the condition of a screw rotation speed of 65 rpm. At this time, the mold temperature was controlled at 210 °C.
  • Step 7 After the product is solidified and cooled, the mold is opened and the product is taken out.
  • Product test results are as follows:
  • the surface coating layer of the invention is coated on the outer surface of the cushion bracket, and on the basis of ensuring the comfort of the toilet seat cushion, the use cost of the material is reduced, the processing cost of the product is saved, and the marketing value is greatly increased;
  • the invention produces a composite silicone toilet seat by a composite forming process, which saves the process of secondary molding, and makes the whole process flow simpler and more convenient;
  • the invention adopts a processing process of composite molding, so that the surface coating layer is seamlessly coated on the cushion bracket through the positioning structure, thereby eliminating the delamination between the surface coating layer and the cushion bracket, and avoiding the weather being too cold, Overheating or frequent use causes the surface coating to be detached from the cushion bracket, which greatly increases the adhesion between the surface coating and the cushion bracket, and significantly improves the quality and comfort of the product.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Toilet Supplies (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

一种复合型硅胶马桶坐垫，包括表面包覆层（1）、定位结构和坐垫支架（2），表面包覆层（1）由硅胶所制，表面包覆层通过定位结构无缝包覆在坐垫支架（2）的外表面。其制备工艺包括以下步骤：步骤1，均匀混合硅胶的原料；步骤2，将硅胶原料加入塑化系统中；步骤3，采用工业酒精清洗坐垫支架表面；步骤4，对坐垫支架进行表面处理，并对处理后的坐垫支架表面的粉尘进行吹气；步骤5，将清洗完毕的坐垫支架放入模具中；步骤6，待塑化系统中的硅胶原料塑化充分，将其注射到模具；步骤7，产品固化冷却后开模，并将产品取出。以上工艺节约成本，增加产品的粘合牢度，提高产品的使用质量和舒适度。

Description

一种复合型硅胶马桶坐垫及其制备工艺 技术领域
本发明属于卫生洁具领域，特指一种复合型硅胶马桶坐垫及其制备工艺。
背景技术
马桶为现代人日常生活中不可或缺的卫浴设备，马桶由马桶盖、马桶坐垫和底座三部分组成。其中，马桶坐垫作为与人体皮肤直接接触的部件，大多都是由塑料材料注塑成型，其缺点是：一、冬天坐上马桶坐垫时人体感觉冰冷；二、马桶坐垫材质太硬，坐着不舒适；三、在放下马桶坐垫时，马桶坐垫易与底座发生碰撞，从而发出噪声；四、塑料材质容易泛黄老化，造成产品外观不雅和性能下降。因此，部分马桶坐垫采用聚氨酯所制，以克服上述缺点。
现有技术中，习知的聚氨酯马桶坐垫，与坐垫支架的粘合性差，不仅聚氨酯材料花费较大，时间长久容易剥离，使用寿命较短，而且多为二次成型，工艺复杂，步骤繁多，无疑增加了使用成本，从而降低产品的整体质量。
有鉴于此，本发明人专门设计了一种复合型硅胶马桶坐垫及其制备工艺，本案由此产生。
发明内容
本发明的目的之一在于提供一种复合型硅胶马桶坐垫，以节约使用成本，增加产品的粘合牢度，提高产品的使用质量和舒适度，并符合人体工学的要求。
本发明的目的之二在于提供一种制备复合型硅胶马桶坐垫的工艺，以优化加工工艺，实现硅胶马桶坐垫的一次复合成型。
为了实现上述目的，本发明的技术方案如下：
一种复合型硅胶马桶坐垫，包括表面包覆层、定位结构和坐垫支架，表面包覆层由硅胶所制，表面包覆层通过定位结构无缝包覆在坐垫支架的外表面。
所述定位结构是表面包覆层的端部一体设有第一转折部和第一横梁，第一转折部与第一横梁连接，第一横梁向上延伸形成第一钩状结构，坐垫支架端部的上侧一体设有第二横梁，第二横梁向下延伸形成第二钩状结构，第一钩状结构与第二钩状结构相互咬合。
一种复合型硅胶马桶坐垫的制备工艺，它包括以下步骤：
步骤1，均匀混合硅胶的原料；
步骤2，将硅胶原料加入塑化系统中；
步骤3，采用工业酒精清洗坐垫支架表面；
步骤4，对坐垫支架进行表面处理，并对处理后的坐垫支架表面的粉尘进行吹气；
步骤5，将清洗完毕的坐垫支架放入模具中；
步骤6，待塑化系统中的硅胶原料塑化充分，将其注射到模具；
步骤7，产品固化冷却后开模，并将产品取出。
所述步骤6中，硅胶原料在压力为100-180Kg/cm2的条件下注射到模具中。
所述步骤6中，硅胶原料在螺杆转速是40-100rpm的条件下塑化。
所述硅胶的原料包括：A组分(基础胶和催化剂)和B组分(基础胶、含氢硅油和抑制剂)，B组分/A组分的质量比为1；A组分和B组分在温度为170-250℃的条件下混合反应。
采用上述方案后，本发明具有以下几个优点：
一、本发明的表面包覆层包覆在坐垫支架的外表面，在确保马桶坐垫舒适度的基础上，减少了材料的使用耗费，节约了产品的加工成本，大大增加了市场推广价值；
二、本发明通过一次复合成型的加工工艺制得复合型硅胶马桶坐垫，节省了二次成型的工序，使得整个加工工艺流程更为简单且便捷；
三、本发明采用一次复合成型的加工工艺，使得表面包覆层通过定位结构无缝包覆在坐垫支架，消除了表面包覆层与坐垫支架之间的分层，避免了因天气过冷、过热或是使用频繁而造成表面包覆层与坐垫支架脱离开裂的情况，大大增加了表面包覆层与坐垫支架的粘合牢度，显著提高了产品的使用质量和舒适度。
以下结合附图和具体实施方式对本发明做进一步说明。
附图说明
图1是本发明的仰视图；
图2是本发明表面包覆层与坐垫支架的的结构示意图；
图3是本发明放入模具的结构示意图；
图4是本发明聚氨酯发泡过程的示意图。
标号说明
表面包覆层1，第一钩状结构11，第一转折部12，第一横梁13，坐垫支架2，第二钩状结构21，第二横梁22，模具3。
具体实施方式
如图1至图4所示，本发明揭示的一种复合型硅胶马桶坐垫，包括表面包覆层1、定位结构和坐垫支架2，表面包覆层1由硅胶所制，表面包覆层1通过定位结构无缝包覆在坐垫支架2的外表面。
定位结构可以有多种，具体可以是表面包覆层1的端部一体设有第一转折部12和第一横梁13，第一转折部12与第一横梁13连接，第一横梁13向上延伸形成第一钩状结构11，坐垫支架2端部的上侧一体设有第二横梁22，第二横梁22向下延伸形成第二钩状结构21，第一钩状结构11与第二钩状结构21相互咬合。
在本实施例中，坐垫支架2的材料有多种，具体可以是塑料材料、木材或者金属材料所制。塑料优选为PP聚丙烯、软质PVC聚氯乙烯、ABS丙烯腈-丁二烯-苯乙烯共聚物或脲醛。PP聚丙烯的表面刚度和抗划痕特性很好，不存在环境应力开裂问题。软质PVC聚氯乙烯有较好的机械性能，抗张强度和冲击强度较高，有优异的介电性能。ABS是一种强度高、韧性好、易于加工成型的热塑型高分子材料结构，有很好的成型性，加工出的产品表面光洁，易于染色和电镀。脲醛成本低廉，颜色浅，硬度高，耐油，抗霉，有较好的绝缘性和耐温性，具有绿色环保和无毒无味等优点。
本发明制备复合型硅胶马桶坐垫的工艺，它包括以下步骤：
步骤1，均匀混合硅胶的原料；
步骤2，将硅胶原料加入塑化系统中；
步骤3，采用工业酒精清洗坐垫支架表面；
步骤4，对坐垫支架进行表面处理，并对处理后的坐垫支架表面的粉尘进行吹气；
步骤5，将清洗完毕的坐垫支架放入模具中；
步骤6，待塑化系统中的硅胶原料塑化充分，将其注射到模具；其中，硅胶原料在压力为100-180Kg/cm2的条件下注射到模具中，并在螺杆转速是40-100rpm的条件下塑化
步骤7，产品固化冷却后开模，并将产品取出。
本发明的硅胶在模具3内塑化包覆于坐垫支架2的外表面，既无需分别对表面包覆层1和坐垫支架2进行加工，也无需对二者进行粘接，即通过一次复合成型的加工工艺便可制得复合型硅胶马桶坐垫，消除了表面包覆层1与坐垫支架2之间的分层，增加了表面包覆层1与坐垫支架2的粘合牢度，其制得的产品性能是传统工艺所不及的。
为了使表面包覆层1具有更好的性能指标，硅胶的原料包括：A组分(基础胶和催化剂)和B组分(基础胶、含氢硅油和抑制剂)，B组分/A组分的质量比为1；A组分和B组分在温度为170-250℃的条件下混合反应得到此实施例的硅胶。由该硅胶制得的表面包覆层1具有以下性能指标。
表1 表面包覆层的性能指标
项目 单位 性能指标
硬度 HSA ≥25
密度 Kg/m3 1000-1200
拉伸强度 Mpa ≥7.0
断裂伸长率 ％ ≥500
撕裂强度 N/mm ≥25
实施例一：
A组分由下列原料按重量份数配制而成：乙烯基硅橡胶100份，白炭黑25份，催化剂0.5份；B组分为乙烯基硅橡胶100份，白炭黑25份，交联剂1份，抑制剂0.5份，B组分/A组分的质量比为1。
制备复合型硅胶马桶坐垫的工艺，它包括以下步骤：
步骤1，均匀混合硅胶的原料；
步骤2，将硅胶原料加入塑化系统中；
步骤3，采用工业酒精清洗坐垫支架表面；
步骤4，对坐垫支架进行表面处理，并对处理后的坐垫支架表面的粉尘进行吹气；
步骤5，将清洗完毕的坐垫支架放入模具中；
步骤6，待塑化系统中的硅胶原料塑化充分，将其注射到模具；其中，硅胶原料在压力为140Kg/cm2的条件下注射到模具中，并在螺杆转速是60rpm的条件下塑化，此时，模具温度控制在185℃。
步骤7，产品固化冷却后开模，并将产品取出。产品测验结果如下：
表2 表面包覆层的性能指标
项目 单位 性能指标
硬度 HSA 40
密度 Kg/m3 1120
拉伸强度 Mpa ≥7.0
断裂伸长率 ％ ≥500
撕裂强度 N/mm ≥25
实施例二：
A组分由下列原料按重量份数配制而成：乙烯基硅橡胶100份，白炭黑40份，催化剂1.0份；B组分为乙烯基硅橡胶100份，白炭黑40份，交联剂1.5份，抑制剂0.5份，B组分/A组分的质量比为1。
制备复合型硅胶马桶坐垫的工艺，它包括以下步骤：
步骤1，均匀混合硅胶的原料；
步骤2，将硅胶原料加入塑化系统中；
步骤3，采用工业酒精清洗坐垫支架表面；
步骤4，对坐垫支架进行表面处理，并对处理后的坐垫支架表面的粉尘进行吹气；
步骤5，将清洗完毕的坐垫支架放入模具中；
步骤6，待塑化系统中的硅胶原料塑化充分，将其注射到模具；其中，硅胶原料在压力为160Kg/cm2的条件下注射到模具中，并在螺杆转速是60rpm的条件下塑化，此时，模具温度控制在200℃。
步骤7，产品固化冷却后开模，并将产品取出。产品测验结果如下：
表3 表面包覆层的性能指标
项目 单位 性能指标
硬度 HSA 60
密度 Kg/m3 1200
拉伸强度 Mpa ≥8
断裂伸长率 ％ ≥550
撕裂强度 N/mm ≥30
实施例三：
A组分由下列原料按重量份数配制而成：乙烯基硅橡胶100份，白炭黑45份，催化剂1.5份；B组分为乙烯基硅橡胶100份，白炭黑45份，交联剂2份，抑制剂1份，B组分/A组分的质量比为1。
制备复合型硅胶马桶坐垫的工艺，它包括以下步骤：
步骤1，均匀混合硅胶的原料；
步骤2，将硅胶原料加入塑化系统中；
步骤3，采用工业酒精清洗坐垫支架表面；
步骤4，对坐垫支架进行表面处理，并对处理后的坐垫支架表面的粉尘进行吹气；
步骤5，将清洗完毕的坐垫支架放入模具中；
步骤6，待塑化系统中的硅胶原料塑化充分，将其注射到模具；其中，硅胶原料在压力为170Kg/cm2的条件下注射到模具中，并在螺杆转速是65rpm的条件下塑化，此时，模具温度控制在210℃。
步骤7，产品固化冷却后开模，并将产品取出。产品测验结果如下：
表4 表面包覆层的性能指标
项目 单位 性能指标
硬度 HSA 75
密度 Kg/m3 1200
拉伸强度 Mpa ≥11
断裂伸长率 ％ ≥550
撕裂强度 N/mm ≥35
本发明具有以下几个优点：
一、本发明的表面包覆层包覆在坐垫支架的外表面，在确保马桶坐垫舒适度的基础上，减少了材料的使用耗费，节约了产品的加工成本，大大增加了市场推广价值；
二、本发明通过一次复合成型的加工工艺制得复合型硅胶马桶坐垫，节省了二次成型的工序，使得整个加工工艺流程更为简单且便捷；
三、本发明采用一次复合成型的加工工艺，使得表面包覆层通过定位结构无缝包覆在坐垫支架，消除了表面包覆层与坐垫支架之间的分层，避免了因天气过冷、过热或是使用频繁而造成表面包覆层与坐垫支架脱离开裂的情况，大大增加了表面包覆层与坐垫支架的粘合牢度，显著提高了产品的使用质量和舒适度。
上述实施例和图式并非限定本发明的产品形态和式样，任何所属技术领域的普通技术人员对其所做的适当变化或修饰，皆应视为不脱离本发明的专利范畴。

Claims (6)

  1. 一种复合型硅胶马桶坐垫，其特征在于：包括表面包覆层、定位结构和坐垫支架，表面包覆层由硅胶所制，表面包覆层通过定位结构无缝包覆在坐垫支架的外表面。
  2. 如权利要求1所述的复合型硅胶马桶坐垫，其特征在于：所述定位结构是表面包覆层的端部一体设有第一转折部和第一横梁，第一转折部与第一横梁连接，第一横梁向上延伸形成第一钩状结构，坐垫支架端部的上侧一体设有第二横梁，第二横梁向下延伸形成第二钩状结构，第一钩状结构与第二钩状结构相互咬合。
  3. 如权利要求1所述的一种复合型硅胶马桶坐垫的制备工艺，其特征在于：它包括以下步骤：
    步骤1，均匀混合硅胶的原料；
    步骤2，将硅胶原料加入塑化系统中；
    步骤3，采用工业酒精清洗坐垫支架表面；
    步骤4，对坐垫支架进行表面处理，并对处理后的坐垫支架表面的粉尘进行吹气；
    步骤5，将清洗完毕的坐垫支架放入模具中；
    步骤6，待塑化系统中的硅胶原料塑化充分，将其注射到模具；
    步骤7，产品固化冷却后开模，并将产品取出。
  4. 如权利要求3所述的复合型硅胶马桶坐垫的制备工艺，其特征在于：所述步骤6中，硅胶原料在压力为100-180Kg/cm2的条件下注射到模具中。
  5. 如权利要求3所述的复合型硅胶马桶坐垫的制备工艺，其特 征在于：所述步骤6中，硅胶原料在螺杆转速是40-100rpm的条件下塑化。
  6. 如权利要求3所述的复合型硅胶马桶坐垫的制备工艺，其特征在于：所述硅胶的原料包括：A组分(基础胶和催化剂)和B组分(基础胶、含氢硅油和抑制剂)，B组分/A组分的质量比为1；A组分和B组分在温度为170-250℃的条件下混合反应。
PCT/CN2015/081378 2015-04-13 2015-06-12 一种复合型硅胶马桶坐垫及其制备工艺 WO2016165208A1 (zh)

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