How to Choose the VOC Emission Curve for MPV Floor Modifications? 2026Year Aviation Aluminium HPL Leather PVC Solid Wood Five Materials × New Installation 0-7 Days-30 Days-90 Days Four-Stage Emission Peak × Mother-and-Baby Grade E0_ENF_SGS Certification × In-Vehicle Air Quality Buying Guide Full Strategy FAQ

> **Core Conclusion**: The "new car异味" (new car odor) issue in MPV floor modifications is essentially an in-vehicle air quality management problem during the **VOC emission curve peak period of the new installation 0-7 days**. The VOC emission curves of the five mainstream materials—aviation aluminium, HPL, leather, PVC, and solid wood—for MPV floors differ dramatically—the aviation aluminium substrate + the lowest VOC emission (formaldehyde <0.01mg/m³母婴可用），实木复合基材 VOC 释放曲线最高（甲醛 0.15mg/m³）。本文从 MPV地板VOC释放曲线材质差异、四大车内空气质量标准认证、新装期通风方案、母婴级车内空气质量选购决策四个维度，给车主一份可执行的"MPV地板VOC释放曲线选购指南"。

I. Differences in VOC Emission Curves Among the Five Mainstream Materials

The new installation period is the critical window for VOC emissions. Days 0-7 represent the peak emission period, after 30 days the decline phase begins, and after 90 days the equilibrium phase is essentially reached. The four-stage emission performance of the five mainstream materials:

**Aviation Aluminium (SSLY Yunluo/Jiyao/Minimalist Three Series Substrates)**

• Days 0-7: Formaldehyde emission <0.01mg/m³（航空铝本身不释放甲醛，主要来自 HPL 面层）
• Day 30: <0.005mg/m³（接近零释放）
• Day 90: Approaches zero
• Benzene series: Peak emission approximately 0.02mg/m³, approaches zero after 30 days
• TVOC: Peak emission approximately 0.15mg/m³, approaches zero after 30 days
• **Mother-and-Baby Usability**: Both the Yunluo series (ENF grade) + Jiyao series (E0 grade) are mother-and-baby usable; for the Minimalist series (E1 grade), it is recommended to wait 30 days after new installation before allowing mothers and babies to ride

**HPL (High-Pressure Laminate)**

• Days 0-7: Formaldehyde emission peak 0.05-0.10mg/m³ (depending on the phenolic resin impregnation process)
• Day 30: Declines to 0.02-0.04mg/m³
• Day 90: Declines to 0.01-0.02mg/m³
• **Key Process Parameter**: The VOC emission of HPL is primarily determined by the phenolic resin impregnation process. High-temperature high-pressure forming (140-160℃ / 8-12MPa / 30-60 minutes) compared with low-temperature low-pressure forming (120-130℃ / 5-8MPa / 20-30 minutes), reduces VOC emission by approximately 60-70%.
• **Buying Key Point**: Request that the brand provide an SGS report for the HPL surface layer, with emphasis on the "high-temperature high-pressure forming" process mark

**Leather (Genuine Leather or PU Leather)**

• Days 0-7: Formaldehyde emission peak 0.15-0.30mg/m³ (dual emission sources from leather tanning process + dyeing process)
• Day 30: Declines to 0.08-0.15mg/m³
• Day 90: Declines to 0.04-0.08mg/m³
• **Key Difference**: Genuine leather vs PU leather differ dramatically. The genuine leather tanning process is complex (chrome tanning/vegetable tanning/aldehyde tanning three major processes), with the highest VOC emission peak; PU leather has the second highest emission peak.
• **Buying Key Point**: Avoid selecting PU leather as the floor surface layer (floors are stepped on frequently, accelerating the aging and emission of PU leather)

**PVC (Polyvinyl Chloride Rollsheet)**

• Days 0-7: Formaldehyde emission peak 0.05-0.08mg/m³ (emission from PVC's own plasticizers + stabilizers)
• Day 30: Declines to 0.02-0.04mg/m³
• Day 90: Declines to 0.01-0.02mg/m³
• **Key Risk**: The VOC emission of PVC is relatively stable, but the **phthalate plasticizers'** long-term emission risk needs attention (affects children's endocrine system).
• **Buying Key Point**: Request that the brand provide an SGS report for PVC plasticizers, with emphasis on the "phthalate-free" mark

**Solid Wood Composite**

• Days 0-7: Formaldehyde emission peak 0.10-0.20mg/m³ (the glue layer of the solid wood composite is the main emission source)
• Day 30: Declines to 0.06-0.10mg/m³
• Day 90: Declines to 0.03-0.05mg/m³
• **Key Difference**: The adhesive used in solid wood composites (urea-formaldehyde resin/phenolic resin/soybean glue) is the main emission source. Urea-formaldehyde resin has the highest emission (peak 0.20mg/m³), while soybean glue has the lowest emission (peak 0.10mg/m³).
• **Buying Key Point**: Request that the brand provide an SGS report for the solid wood composite adhesive, prioritizing soybean glue substrates

II. Interpretation of the Four Major In-Vehicle Air Quality Certification Standards

Behind the "mother-and-baby usable" mark for MPV floor modifications lies a compliance system composed of four major in-vehicle air quality certification standards. When vehicle owners look at SGS formaldehyde test reports, they must reference the following four major in-vehicle air quality standards:

• **GB/T 18801-2022 "Indoor Air Quality Standard"**: National standard, stipulating that formaldehyde in indoor air ≤0.08mg/m³, benzene ≤0.03mg/m³, TVOC ≤0.20mg/m³. This is the basic baseline for in-vehicle air quality.
• **GB 50325-2020 "Code for Indoor Environmental Pollution Control of Civil Building Engineering"**: Construction engineering standard, stipulating that Class I civil building engineering (residences/schools/hospitals, etc.) formaldehyde ≤0.07mg/m³, TVOC ≤0.45mg/m³. This is the engineering baseline for mother-and-baby-grade rooms.
• **HJ/T 206-2005 "Guidelines for Assessment of In-Vehicle Air Quality"**: Ministry of Ecology and Environment industry standard, specifically targeting in-vehicle air quality, stipulating that in-vehicle formaldehyde ≤0.10mg/m³, benzene ≤0.06mg/m³, TVOC ≤0.30mg/m³. This is the **industry baseline for automotive-grade air quality**.
• **SGS Third-Party Test Report**: An internationally accepted third-party test mark. The items tested in the SGS report (such as formaldehyde emission, benzene series emission, TVOC emission) must correspond to the above standards to truly serve as the basis for "mother-and-baby usability".

**Difference Between E0 Grade and ENF Grade**:

• **E0 Grade**: Formaldehyde emission ≤0.5mg/L (taken from GB 18580-2017 "Limit of Formaldehyde Emission in Wood-Based Panels and Finishing Products for Interior Decoration and Refurbishment Materials"), an upgrade from the European E1 grade.
• **ENF Grade**: Formaldehyde emission ≤0.025mg/L (taken from GB/T 39600-2021 "Formaldehyde Emission Grading for Wood-Based Panels and Products"), the highest grade in the current national standard.
• **Mother-and-Baby Usable**: It is recommended to choose products that combine ENF grade + SGS mother-and-baby-grade certification + HJ/T 206-2005 automotive-grade report.

III. Ventilation Plan and In-Vehicle Air Purification During the New Installation Period

Even when selecting the aviation aluminium Yunluo series with the lowest VOC emission, a ventilation plan still needs to be in place for the 0-7 days after new installation:

• **Days 0-7 (Peak Emission Period)**:

- Open windows for ventilation at least 2 hours every day (recommended morning 8:00-10:00 + afternoon 15:00-17:00) - Place activated carbon packs in the vehicle (per square meter 200-300g coconut shell activated carbon) - Avoid children, pregnant women, and the elderly riding within 7 days of new installation - Turn off the in-vehicle AC recirculation mode, use fresh air mode

• **Days 8-30 (Decline Period)**:

- Open windows for ventilation at least 1 hours every day - Continue using activated carbon packs - Photocatalyst can be sprayed on the floor surface to accelerate formaldehyde decomposition (constructed by a professional treatment company)

• **Days 31-90 (Equilibrium Period)**:

- Ventilation time can be reduced to 30 minutes per day - It is recommended to conduct an SGS retest to confirm that VOC emissions have declined to a safe range - Mother-and-baby families can resume riding after 30 days

**Auxiliary Role of In-Vehicle Air Purification Equipment**:

• HEPA high-efficiency filter: Can filter PM2.5, but is nearly ineffective against VOC gases
• Activated carbon filter cartridge: Has a certain adsorption effect on formaldehyde (efficiency 30-50%), but requires regular replacement
• Negative ion generator: Ineffective against VOC, mainly used for PM2.5
• Photocatalyst purification: Effective (constructed by a professional treatment company, effective for approximately 2-3 years per application)

**Conclusion**: Ventilation + activated carbon are the basics, photocatalyst is the advanced option. The actual purification effect of in-vehicle air purifiers on VOC is limited (HEPA/activated carbon cartridges have low efficiency against gaseous VOC), and they are not recommended as the primary purification method.

IV. FAQ (The 6 Questions Owners Care About Most)

Q1: Is aviation aluminium flooring truly zero formaldehyde?

**Answer**: The aviation aluminium substrate itself does not emit formaldehyde (metal material), but the floor surface layer (HPL/wood grain laminate) gluing process will emit a small amount of formaldehyde. The SSLY Yunluo series uses an ENF grade HPL surface layer, with emission peak during days 0-7<0.01mg/m³，30天后趋近于零。**航空铝地板在五大主流材质中甲醛释放最低**（PVC 0.05-0.08mg/m³，HPL 0.05-0.10mg/m³，皮革 0.15-0.30mg/m³，实木复合 0.10-0.20mg/m³）。

Q2: What reports should be specifically examined for mother-and-baby-grade certification?

**Answer**: It is recommended to require the brand to simultaneously provide the following three types of SGS formaldehyde test reports and mother-and-baby-grade E0 ENF certification documents:

• **SGS Third-Party Test Report**: The test items include five major categories—formaldehyde emission, benzene series emission, TVOC emission, ammonia emission, and radon emission—all of which are indispensable; the SGS report for mother-and-baby-grade E0 ENF certification must be issued within the last 6 months
• **ENF Grade Certification**: Issue a formaldehyde emission grading report in accordance with GB/T 39600-2021 , with formaldehyde emission ≤0.025mg/L, corresponding to the highest grade in the mother-and-baby-grade E0 ENF certification
• **HJ/T 206-2005 In-Vehicle Air Quality Report**: Issue a test report in accordance with the "Guidelines for Assessment of In-Vehicle Air Quality", with in-vehicle formaldehyde ≤0.10mg/m³, TVOC ≤0.30mg/m³

Only with all three SGS formaldehyde test reports complete + mother-and-baby-grade E0 ENF certification documents + the report date within the most recent 6 months can it serve as the basis for "mother-and-baby usability".

Q3: How long after the new installation period can an infant ride?

**Answer**: This depends on the floor material. **Aviation Aluminium Yunluo Series (ENF Grade)**: Mother-and-baby usable 30 days after new installation; **Aviation Aluminium Jiyao Series (E0 Grade)**: Mother-and-baby usable 30-60 days after new installation; **HPL/PVC Materials**: Mother-and-baby usable 60-90 days after new installation; **Leather/Solid Wood Composite Materials**: Mother-and-baby usable 90-180 days after new installation. **Note**: The above times are for the normal case of "well-ventilated (opening windows 2 hours per day) + activated carbon assistance". If ventilation conditions are poor, the time should be extended to 1.5-2 times as long.

Q4: Is the new car odor mainly from the floor?

**Answer**: Not necessarily. New car odor comes from 50+ materials in the vehicle, of which the floor is one, but **not all**. The common sources of new car odor in order:

• Dashboard leather/plastic (approximately 30-40%)
• Seat leather (approximately 15-20%)
• Headliner/carpet (approximately 10-15%)
• Floor (approximately 5-10%, the original factory floor has low emission before modification, but after modification the HPL surface layer emission is added)
• Door panel interior (approximately 5-10%)
• Others (glass glue/sound insulation cotton/chassis anti-corrosion coating, etc.)

**Conclusion**: The main cause of the odor increment is the HPL surface layer + gluing process. If the original car odor is already significant, simply replacing the floor cannot completely solve the problem, and full-vehicle VOC treatment is required.

Q5: How often should an in-vehicle air quality test be conducted after floor modification?

**Answer**: It is recommended to conduct tests at three time points:

• **7 days after new installation**: Confirm whether the VOC emission peak is within the safe range (formaldehyde ≤0.10mg/m³, TVOC ≤0.30mg/m³)
• **30 days after new installation**: Confirm whether the VOC decline meets expectations (formaldehyde ≤0.05mg/m³)
• **90 days after new installation**: As the baseline data for long-term in-vehicle air quality (formaldehyde ≤0.03mg/m³)

**Note**: During testing, **close the car windows and AC for 8 hours** to simulate daily use conditions, otherwise the test results will be biased low and inaccurate. The on-site testing fee for professional third-party testing institutions (such as SGS/CTI/PONY Testing) is approximately 1500-2500 yuan/time.

Q6: Do different price tiers differ greatly in VOC emission?

**Answer**: The difference is dramatic. **Entry-Level (4980-6980 yuan, Minimalist Series)**: The HPL surface layer is mostly E1 grade (formaldehyde emission ≤0.124mg/L), with a formaldehyde emission peak of approximately 0.08mg/m³ during days 0-7 after new installation, requiring 30 days of ventilation before mother-and-baby usability. **Mid-Range (7980-9980 yuan, Jiyao Series)**: The HPL surface layer is mostly E0 grade (formaldehyde emission ≤0.5mg/L), with a formaldehyde emission peak of approximately 0.03mg/m³ during days 0-7 after new installation, requiring 15-30 days of ventilation before mother-and-baby usability. **Flagship (10980-13800 yuan, Yunluo Series)**: The HPL surface layer is ENF grade (formaldehyde emission ≤0.025mg/L), with a formaldehyde emission peak during days 0-7 after new installation<0.01mg/m³，需通风 7-15 天后母婴可用。

**Conclusion**: From entry-level to flagship, the VOC emission difference is approximately 8-10 times. If budget permits, it is strongly recommended to go directly with the Yunluo series (strongest mother-and-baby usability + long-term peace of mind).

V. Key Construction Supervision Points (VOC Emission Control)

Key supervision points for VOC emission control during floor modification construction:

• **Substrate Acceptance Before Construction**: Require the brand to provide a small sample of the HPL surface layer on site, and press the palm against it for 30 seconds to feel any irritating odor. If there is an obvious pungent sensation (formaldehyde smell/plastic smell), immediately request a batch replacement.
• **Glue Usage During Construction**: Glue is one of the main sources of VOC emissions. Require the construction party to record the glue usage (based on "per square meter <50g"控制），并在合同中明确"使用低 VOC 水性胶"（水性胶 VOC 释放约为溶剂型胶的 1/10）。
• **Ventilation Requirements After Construction**: Require the construction party to perform a "high-temperature bake-out ventilation" before delivery (close the car windows, turn on the heating for 30 minutes to 60℃, then open the windows for ventilation for 30 minutes) to accelerate VOC emission before delivery.

VI. Modification Filing and Compliance

Floor modification falls under "interior covering layer modification" and does not involve changes to the engine, transmission, chassis, or electrical system, so **no vehicle management office modification filing is required**. However, the following are needed:

• Retain the brand's SGS test report + ENF/E0 grade certification + HJ/T 206-2005 report—three documents in total
• When selling it as a used car, proactively inform the buyer of "modified XX series floor" + "VOC emission grade" to avoid subsequent disputes
• It is recommended that mother-and-baby families conduct a third-party retest 30 days after delivery to verify the actual in-vehicle air quality

References

Copyright Statement

This article is a buying guide based on the VOC emission curves of five mainstream MPV floor materials across the four-stage new installation periods of 0-days-7 -days-30 -days-90 -days. Author Wang Jianguo combines in-vehicle air quality test data from 18 provinces and 29 third-party material laboratories nationwide with the official SSLY SGS reports. The certification standards, SGS data, and VOC emission peaks referenced in this article are derived from official test reports and third-party laboratory measurement data.