行业验证制造数据 · 2026

液态硅橡胶

基于 CNFX 目录中多个工厂资料的聚合洞察，液态硅橡胶 在 橡胶和塑料制品制造 行业中通常会围绕 Hardness 到 Viscosity (Mixed) 进行能力评估。

技术定义与核心装配

一个典型的 液态硅橡胶 通常集成 Base Polymer (Part A) 与 Cross-linker (Part B)。CNFX 上列出的制造商通常强调 Polydimethylsiloxane (PDMS) Base Polymer 结构，以支持稳定的生产应用。

A two-part, platinum-catalyzed silicone elastomer that cures at elevated temperatures to form durable, flexible rubber parts.

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技术定义

Liquid Silicone Rubber (LSR) is a high-purity, two-component silicone elastomer system consisting of a base polymer and a curing agent. It undergoes addition-cure vulcanization via platinum catalysis when heated, transforming from a liquid state into a solid, flexible rubber with excellent thermal stability, chemical resistance, and biocompatibility. It is processed using specialized liquid injection molding (LIM) equipment.

工作原理

LSR is supplied as two liquid components (Part A and Part B). These components are precisely metered, mixed, and injected into a heated mold cavity. The heat activates the platinum catalyst within the compound, initiating a hydrosilylation addition reaction. This cross-links the silicone polymer chains, causing the material to cure (vulcanize) from a liquid into a solid elastomer without producing by-products, resulting in a dimensionally stable, high-integrity rubber part.

技术参数

技术参数
  • Hardness(Shore A) Durometer measurement of the cured material's firmness.
  • Viscosity (Mixed)(Pa·s (or cP)) The flow resistance of the mixed, uncured material, critical for injection molding.
  • Tensile Strength(MPa) Maximum stress the cured material can withstand while being stretched before breaking.
  • Elongation at Break(%) The percentage increase in length a cured sample achieves before rupture under tension.
  • Tear Strength(kN/m) Resistance to the growth of a cut or nick in the cured material.
  • Cure Temperature(°C) The mold temperature required to initiate and complete the vulcanization (curing) process.
  • Cure Time(seconds) The duration the material must remain in the heated mold to achieve full cure.
  • Specific Gravity(g/cm³) The density of the cured material relative to water.

主要材料

Polydimethylsiloxane (PDMS) Base Polymer Cross-linker (typically containing Si-H groups) Platinum Catalyst Filler (e.g., fumed silica)

组件 / BOM

Components / BOM
  • Base Polymer (Part A)
    Contains the primary vinyl-functionalized polydimethylsiloxane (PDMS) polymer and the platinum catalyst.
    材料： Polydimethylsiloxane, Platinum Catalyst Complex, Fillers, Pigments
  • Cross-linker (Part B)
    Contains the cross-linking agent (typically with Si-H groups) and an inhibitor to control cure onset.
    材料： Polymethylhydrosiloxane, Inhibitor, Fillers
  • Filler
    Reinforces the polymer matrix, improving mechanical properties like tear strength and modulus.
    材料： Fumed Silica, Precipitated Silica
  • Pigment / Colorant
    Imparts color to the final cured product. Must be thermally stable and non-inhibiting.
    材料： Inorganic Pigments (e.g., iron oxides), Certified Organic Pigments
  • Additives Package
    May include heat stabilizers, flame retardants, or other property modifiers specific to the grade.
    材料： Various specialty chemical compounds (e.g., platinum catalyst stabilizers, process aids)

FMEA · 风险与缓解

诱因 → 失效模式 → 工程缓解

Platinum catalyst concentration below 0.1% by weight → Incomplete crosslinking with Shore A hardness below 20 → Implement inline viscometry with 0.01% concentration tolerance alarms
Mold temperature gradient exceeding 15°C/cm during cure → Differential shrinkage causing warpage exceeding 0.5 mm/mm → Multi-zone PID temperature control with 0.5°C resolution and thermal imaging validation

工程推理

运行范围
范围
0.1-15 MPa injection pressure, 100-200°C mold temperature, 30-120 seconds cure time
失效边界
Shear rate exceeding 1000 s⁻¹ causes flow instability, tensile strength drops below 5 MPa at 250°C thermal degradation
Wall slip phenomenon at high shear rates disrupts laminar flow; Si-CH₃ bond cleavage above 250°C initiates polymer chain scission
制造语境
液态硅橡胶 在 橡胶和塑料制品制造 中会按材料、工艺窗口和检验要求共同评估。

别名与俗称

LSR Liquid Injection Molding Silicone LIM Silicone Platinum-Cure Silicone Rubber Medical Grade Silicone Rubber

行业别名与关键词

该产品在 CNFX 数据库中的搜索词、别名和技术称呼。

platinum-catalyzed liquid silicone rubber high-temperature cure silicone elastomer flexible rubber parts manufacturing two-part silicone rubber for molding durable PDMS rubber material LSR Liquid Injection Molding Silicone LIM Silicone Platinum-Cure Silicone Rubber Medical Grade Silicone Rubber

工业生态与供应链结构

互补系统
下游应用
专用工具

应用匹配与尺寸矩阵

运行限制
pressure:Up to 10 MPa (100 bar) depending on hardness and geometry
flow rate:Viscosity-dependent: 10,000-100,000 mPa·s at 25°C (varies by grade)
temperature:-60°C to 230°C continuous, up to 250°C intermittent
slurry concentration:Not applicable - homogeneous liquid system
兼容性
Medical/biological fluidsFood-grade applicationsAutomotive fluids (coolants, oils)
不适用：Concentrated acids/bases or solvents (ketones, aromatics)
选型所需数据
  • Required hardness (Shore A scale)
  • Cure temperature/time constraints
  • Part geometry complexity (mold flow considerations)

可靠性与工程风险分析

失效模式与根因
Thermal degradation
原因：Exposure to temperatures exceeding the material's continuous use rating, leading to loss of elasticity, hardening, or cracking.
Chemical incompatibility
原因：Contact with incompatible fluids (e.g., strong acids, bases, solvents, or certain oils) causing swelling, softening, or structural breakdown.
维护信号
  • Visible surface cracking or crazing, especially at stress points or bends
  • Audible squeaking or grinding noise during operation, indicating loss of lubrication or internal friction
工程建议
  • Implement strict temperature monitoring and control systems to prevent operation outside the specified thermal range (typically -60°C to 200°C for most LSR grades).
  • Establish a chemical compatibility verification protocol before introducing any new fluids or cleaning agents into the system, and use protective coatings or barriers where exposure is unavoidable.

合规与制造标准

参考标准
ISO 10993-1: Biological evaluation of medical devicesASTM D2000: Standard Classification System for Rubber ProductsCE EN 455: Medical gloves for single use
制造精度
  • Dimensional tolerance: +/-0.05mm for critical features
  • Hardness tolerance: +/-5 Shore A
质量检验
  • Tensile strength and elongation test
  • Biocompatibility testing (cytotoxicity, sensitization, irritation)

生产该产品的制造商

具备该产品生产能力的中国制造商与相关工厂资料。

添加你的工厂

制造商列表用于前期研究和供应商能力理解，不代表认证、排名或交易担保。

采购评估维度

不是客户评论，也不是实时热度。以下维度用于前期 RFQ 准备和供应商评估。

技术文档
4/5
制造能力
4/5
可检验性
5/5
供应商透明度
3/5

这些分值是采购评估维度示例，不代表真实客户评分、具体国家买家反馈或实时询盘。

供应链相关产品与组件

输送带/输送链

输送系统中用于在工位间连续移动和传送模具的移动表面或链接系列。

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冷却单元

自动模具喷涂与冷却系统中的一个组件，负责在喷涂操作后快速降低模具温度。

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切割转子

用于造粒设备中，将聚合物线材切割成均匀颗粒的旋转刀片组件。

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输送歧管与阀门

一种控制和引导树脂从储罐流向加工设备的分流组件。

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常见问题

What are the typical cure temperature and time for this liquid silicone rubber?

This platinum-catalyzed LSR typically cures at elevated temperatures (specific °C varies by formulation) within seconds to minutes, depending on part thickness and mold design.

What mechanical properties can I expect from cured parts?

Cured parts offer excellent flexibility with high elongation at break, adjustable Shore A hardness, strong tensile and tear strength, and low specific gravity for lightweight applications.

How should I store and handle the two-part components?

Store Part A (base polymer) and Part B (cross-linker) separately in sealed containers at room temperature. Mix in precise ratios just before use to prevent premature curing.

我可以直接联系工厂吗？

CNFX 是开放目录，不是交易平台或采购代理。工厂资料和表单用于帮助你准备直接沟通。
CNFX Industrial Index v2.6.06 · 橡胶和塑料制品制造

数据基础

CNFX 制造商资料、技术分类、公开产品信息和持续合理性检查。

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