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Infrared Spectroscopy: Quality Control and Component Identification in the Rubber Industry
Date: 2025-11-28Read: 2

In the entire chain of the rubber industry, from raw material storage to finished product delivery, from formula development to fault tracing,Rubber component identification has always been the core link in determining product performance and ensuring production safety.GB/T 7764-2017The "Rubber Identification Infrared Spectroscopy Method" provides a standardized solution, and infrared spectroscopy technology, with its fast and non-destructive advantages, is becoming a "key tool" for the rubber industry to solve the problem of component identification.


01 Say goodbye to the 'ingredient fog' and solve the rubber industry3 Big core pain points

pain point 1Raw materials are 'inferior for good', making it difficult to control production risks

Rubber raw materials come in a variety of categories, with raw rubber, vulcanized rubber, and thermoplastic elastomers having similar appearances that are difficult to distinguish solely by naked eye or simple testing. If low performance rubber is mistakenly mixed into the production of products, it may result in substandard product performance or serious safety accidents. Infrared spectroscopy scheme: using transmission method orATRReflection method,30 Testing can be completed within minutes - raw rubber can be directly molded into film, vulcanized rubber does not require complex pre-treatment, relying on4000cm⁻¹-600cm⁻¹ Feature wavenumber range, capturing the "spectral fingerprint" of different rubbers (such as fluororubber)FKMofC-Fkey1000-1400cm⁻¹ absorption peak, nitrile rubberNBRofCNkey2240cm⁻¹ absorption peak), the authenticity and purity of the raw material are clear at a glance.

pain point 2Difficult to identify with rubber and verify formula consistency

Rubber products often use a binary combination system (such as SBR/BRTheNBR/PVC)Small proportion polymer(10%-20%)The component deviation will directly affect key indicators such as product elasticity and aging resistance. Traditional detection methods are difficult to accurately identify and use components, which can easily lead to performance fluctuations between batches. Infrared spectroscopy scheme: referenceGB/T 7764-2017AppendixBChinese71 The standard reference spectrum of rubber can be clearly distinguished and used in conjunction with the laboratory's self built and used rubber spectrum library to identify the characteristic absorption peaks of each component in the system (such as...)EPDMandCSMWhen used together,EPDMof720cm⁻¹-(CH₂)ₙ-Peak andCSMof1160cm⁻¹-SO₂ClPeaks can be identified simultaneously to ensure consistency in formula execution.

pain point 3Unknown samples are difficult to trace, and the efficiency of troubleshooting is low

Faced with market feedback on substandard products and unknown sources of recycled rubber, traditional testing takes several days and is difficult to determine the specific composition. Infrared spectroscopy technology can quickly identify unknown sample components, providing key basis for fault tracing and quality accountability. Infrared spectroscopy scheme:ATRThe reflection method does not require film formation and can be directly attached to the surface of the sample for detection,10 Obtain spectra within minutes; By comparing with the standard spectral library, the unknown rubber series can be quickly determined (such asQSilicone rubber likeREven accurately distinguish microstructural differences (such as natural rubber), such as butyl rubberNRSynthetic isoprene rubberIRof1,4 -cis-/Trans polyisoprene characteristic peak).


02 Full scene coverage, running through the rubber industry4 Key links

1. Raw material storage inspection: guarding the quality "one checkpoint"

Applicable scenarios: Acceptance of raw materials such as raw rubber, vulcanized rubber, and additives upon arrival

Operation process: Sampling 2-5g→ Solvent extraction for impurity removal →ATRRapid detection (or transmission method film detection) → Comparison with standard spectral library

Value: Eliminating 'Adulterated raw materials' flow into the production line, reducing the cost of subsequent production rework

2. Production process quality control: Real time monitoring of formula stability

Applicable scenarios: Batch testing of rubber compounds, monitoring of component changes during vulcanization process

Operation process: From the mixer/Sampling of vulcanizing machine →ATRQuick on-site analysis → Compare standard spectra to confirm component consistency

Value: Real time detection of formula deviations, avoiding batch non conformities caused by ingredient fluctuations

3. Finished product quality traceability: escorting compliance

Applicable scenarios: Factory inspection of finished products, traceability of customer quality complaints

Operation process: Sampling of finished productsSelect the transmission method (thin film) orATRMethod → Issuing standardized testing reports (compliant)GB/T 7764-2017Requirement)

Value: ProvidingreliableTraceable ingredient data for customer review and market regulation

4. Research and Innovation Support: Accelerating the Development of New Rubber Materials

Applicable scenarios: Research and development of new composite rubber formulas, analysis of unknown rubber sample components

Operation process: Prepare samples with different ratios→ Obtain spectra separately → Analyze the changes in characteristic peaks → Optimize the formula

Value: Shorten R&D cycle, help enterprises quickly launch high-performance rubber products

03 Standardization implementation makes testing more professional and reliable

This plan is based onGB/T 7764-2017/ISO 4650:2012Standard development, from equipment selection to operation process, all comply with industry standards:

Equipment configuration: Fourier transform infrared spectrometer (wavenumber range) 4000-600cm⁻¹, resolution ≥4cm⁻¹)+ ATRAttachment (Diamond)/ ZnSeCrystal)+Controllable thermal hydrolysis device to meet the detection needs of different types of rubber;


04 Choosing infrared spectroscopy means choosing "cost reduction and efficiency enhancement"

Time cost reduction 70%:ATRThe method does not require film making,10 Complete single sample testing in minutes;

The testing cost is more controllable: no expensive consumables are required, the solvent can be recycled, and the cost of a single test is only the same as traditional methods 1/3;

Minimizing risk costs: Avoiding the risk of misjudgment of ingredients from the source, reducing order losses and brand reputation damage caused by quality issues.

In today's high-quality development of the rubber industry, infrared spectroscopy is no longer just The "component identification tool" is a "strategic partner" for enterprises to enhance their quality control capabilities and strengthen their market competitiveness. rely onGB/T 7764-2017Standard, let infrared spectroscopy technology safeguard your entire rubber production process, accurately identify every rubber part, and build every quality defense line!