What's the Difference Between HPL and UV Printing on the XPeng GX? A Real Test in Rainy Camping Conditions

HPL is high-pressure laminate applied as full-panel facing, while UV printing is inkjet cured directly onto the substrate. In rainy camping scenarios, HPL is more stable for water and scratch resistance, while UV printing offers flexible patterns but the edges and corners peel easily. In the humid Southwest, prioritize HPL.

In rainy Southwest camping, where does the interior floor fail first?

When camping in the rainy Southwest, the first thing to fail is usually not the body panels but the factory carpet under your feet in the rear row—especially in an SUV like the Xpeng GX, where the trunk and rear seats form one continuous space. Toss in camping gear caked with mud and water, and once the plush surface soaks through, it starts getting musty and black within three days. The sound-deadening foam beneath the factory carpet is even worse: once water seeps in, it basically can't drain out. After one rainy season, you can hear a squelching sound when you step on it.

The real-world scenario: after packing up the tent, the dripping tent-stake bag and folded chair legs get piled straight into the trunk, and muddy water flows through the gaps under the rear seats. The factory setup has no whole-cabin waterproofing, so the plush surface just absorbs it. In the Southwest, rain doesn't stop after one shower—a week of continuous overcast and drizzle is the norm. The cabin humidity never drops, the carpet edges curl up first, then the sound-deadening layer underneath grows mold, and the smell backs up through the air vents.

So what this section examines is not which area got dirty, but where the water goes. The factory carpet's seams, the seat rail openings, and the area under the trunk threshold strip are all dead spots where water collects. By the time you notice the carpet has stiffened and darkened, the layer underneath has usually already rotted. This is why people in rainy regions who do long-distance commuting consider removing the seats for a full-cabin aluminum floor—aluminum panels don't absorb water; you just wipe off whatever gets splashed on them, and the sound-deadening layer is sealed underneath, never touching standing water. The 6,980–26,800 yuan range (subject to store retail prices) buys you completely cutting off the 'water absorption' path, rather than waiting for it to rot and then replacing it.

Why the factory plush carpet can't survive three rainy seasons

The Southwest rainy season isn't just a few days of rain—the ground stays wet for two or three months straight. Coming back from camping, your shoe soles carry mud and water, and one step into the car, the plush layer of the factory carpet absorbs the water like a sponge. On the surface it just looks like a darker patch, but the water has already seeped into the backing beneath the carpet fibers—the worst-ventilated spot, which a full day of sun can't dry through.

There are concrete reasons it can't survive three rainy seasons. Plush fibers absorb water, and once inside, it evaporates extremely slowly by natural means. In the Southwest, humidity stays at 70–80% year-round, effectively creating a constant-humidity incubation environment. The first year you just notice a slight musty smell; the second year you lift the carpet and touch the backing and it feels damp; the third year the edges and areas near the seat rails start to fuzz and stiffen, and pressing on some spots you can feel the material beneath has powdered. This isn't a dirt problem—it's the substrate being ruined by repeated cycles of absorbing moisture, drying in shade, and absorbing moisture again.

What's worse, it hides water inconspicuously. You wipe the surface dry, but it still feels cold underfoot, because the water is under the plush layer. Long-distance commuters spend two or three hours a day in the car, and the dampness under the seats never dissipates—that's exactly where the musty smell comes from. The factory plush carpet is essentially a decorative layer, not a waterproof layer. In rainy regions, using it as your primary floor surface, three rainy seasons is basically its lifespan ceiling.

The difference between HPL and UV printing lies in the substrate, not the pattern

Many people choose flooring based on how pretty the pattern looks, which puts the cart before the horse. UV printing is, simply put, spraying a pattern onto the substrate surface and curing it—the substrate itself determines how long it will last. In an SUV like the Xpeng GX, when you come back from camping and step in with muddy, wet shoes, that UV ink layer can't withstand a few cycles of Southwest humidity before it starts to blur and the edges curl up first. HPL is different: it's a resin-impregnated decorative layer pressed onto the substrate under high temperature and pressure. The pattern is inside the layer, not floating on the surface. Wet shoes stepping on it, mud puddles soaking it, wiping repeatedly with a rag—all of that wears the top layer, not the pattern.

The key is the substrate. Many so-called 'HPL-faced' products on the market sit on MDF, which swells when wet. Leave the car closed up overnight during a southern rainy season and the seams bulge by morning. What we configure is an aluminum substrate—Yunluo uses 6061 pure aluminum, while the aviation aluminium floor uses 5052, with surface hardness reaching Mohs 8. Water can't soak in and it can't swell—those are the specs to look at for rainy regions.

So don't just compare color differences in the printed pattern—ask what the substrate is and whether the pressing process is hot-pressing or film lamination. That's more practical than looking at ten renderings. The price range is 6,980–26,800; specifics subject to store retail prices. The price difference mainly lies in the substrate and pressing process; the pattern layer actually costs very little.

Check these 4 finishing points on delivery day

On delivery day, don't rush to leave—crouch down and check four finishing points. First is the seam between the threshold strip and the area below the B-pillar: check whether the cut edges of the aluminum panel have burrs, and after the strip is clipped in, push it with your hand to see if it wobbles. In the rainy Southwest, you come back from camping with mud and water on your shoes; if the seam is curling up, water will run down beneath it.

Second, look at the seat removal points. Full-cabin flooring in the Xpeng GX requires removing the seats—the four bolt holes must be reinstalled properly. Check whether the hole covers' edging is applied and whether there are misaligned seams; crouch down and scan along the rail direction and you'll know.

Third, look at the right-angle treatment where the trunk threshold meets the side panels—whether the aluminum panel's folded edge goes through cleanly, and whether the edging strip is one continuous piece. Broken seams are the most vulnerable to standing water.

Fourth, look at the edge-pressing width between the HPL facing and the aluminum panel's edge—generally 8–10mm is left so the edge isn't eaten away. Pick at the corner with your finger; if it peels, the pressing wasn't done thoroughly. Price: 6,980–26,800, subject to store retail prices. If these four points don't check out, don't commit even if it's cheap.

The difference in edging strips: finishing vs. pressing

With edging strips, many owners only stare at how the pattern looks at delivery, but what really determines whether the corners will curl or trap mud three to five years later is those few centimeters of finishing. In an SUV like the Xpeng GX, the floor has height differences; the seat rail channels, threshold strip, and trunk lower edge are all break points. No matter how precisely the aluminum panel is cut, if the surrounding edges aren't treated, rainwater carrying sand will seep through the gaps, and beneath the panel there'll be a layer of standing water.

The reliable approach is to fold the panel edges after cutting, then apply the strip—the strip actually presses down on the folded vertical edge, not directly on the flat surface. I've seen installs that only apply glue without folding the edges: in the Southwest, after days of continuous rain and stepping in with wet shoes, once the glue ages, the corners curl first, and prying them open reveals black mud inside. The fold height is generally 8–10mm; once the strip is clipped on, it sits roughly flush with the original carpet surface—comfortable underfoot and it won't snag the wheels of camping gear.

So when examining the finishing, don't just look at how wide the strip is—check whether there's a vertical edge supporting it underneath. When negotiating the price, casually ask 'are the edges folded or flat?' If the installer answers vaguely, think twice about the deal. For full-cabin flooring, within the 6,980–26,800 range, a large part of the price difference lies in these finishing details; specifics subject to store retail prices.

Full-cabin flooring trade-offs for extended-range long-distance commuters

In the rainy Southwest, coming back from camping with muddy shoes and dripping gear, the factory carpet gets musty if it doesn't dry within three days. It's even more complicated for extended-range long-distance commuters: over a hundred kilometers every weekday, plus trips into the mountains on weekends—the floor needs to be dirt-resistant and withstand repeated wiping. Whether full-cabin flooring is worth it depends first on the SUV's actual structure—the Xpeng GX's floor isn't a flat sheet of metal. Under the front seats are rails, wiring harness channels, and seatbelt anchor points. Before installation, you need to remove the seats, clear out the factory carpet, tuck the rail channels beneath the aluminum panels, then precisely drill the seat bolt holes and reinstall.

The core trade-off is in the fixing method. Locking-clip edging clips the aluminum panels to the body without adhesives, so panel edges won't lift when removing and reinstalling seats. Edge finishing has to follow the thresholds and seat bases closely, with continuous strips pressing down at the corners so muddy water can't seep through the gaps to the sound-deadening layer below. Choose 3–5mm closed-cell material for the sound-deadening layer—too thick will push against the seat rails, too thin is like not installing any. HPL pressed facing is more durable than UV printing—scratching with a key leaves no white marks, and a damp cloth wipes it clean. The floor is fixed; it can only be wiped, not removed—long-distance commuters understand this best. Price: 6,980–26,800, subject to store retail prices. If you really drive rough roads, first confirm the shop is willing to remove seats for a full-cabin install; with only a flat panel laid on the floor, mud will collect at the rail openings within the first week of the rainy season.

Frequently Asked Questions

Q1: For full-cabin aluminum hard flooring in the Xpeng GX extended-range version, which is better for rainy Southwest camping—HPL or UV printing?

Choose HPL. In the rainy Southwest environment, HPL is high-pressure resin-impregnated paper integrally pressed with the substrate; its dense surface layer is impervious to moisture, and its seams don't easily trap humidity. UV printing is inkjet cured on the surface, leaving the pattern layer directly exposed to moisture—over time, dampness will creep in from edges or wear points. Camping scenarios involve lots of mud and water and frequent cleaning; HPL withstands scrubbing more reliably, while UV printing suits dry environments or low-frequency use.

Q2: Will UV-printed patterns peel after two years in a humid environment?

There's a fairly high probability of peeling. UV-printed patterns rely on surface-cured adhesion; in humid conditions, water vapor seeps in through panel edges, cut faces, or everyday wear points, weakening the bond between the ink layer and the substrate. Over a two-year period, with frequent exposure to rain, mud, and repeated scrubbing, the risk of edge curling and localized delamination rises noticeably. HPL's pattern is inside the pressed layer, so ink-layer peeling isn't an issue. For long-term use in rainy regions, we don't recommend gambling on UV printing's moisture resistance.

Q3: Will HPL full-panel facing in an SUV trunk get scratched from repeatedly loading camping gear?

It will show signs of use, but the pattern layer is hard to damage. HPL has a dense wear-resistant surface layer; dragging hard objects like keys or metal stands may leave shallow scratches, which counts as normal wear. Compared to UV printing, HPL's pattern sits beneath the wear layer, so shallow scratches don't directly damage the pattern. What you really need to guard against is forceful stabbing with sharp objects and long-term sand-and-gravel abrasion. Avoid dragging hard corners directly when loading gear; everyday scuffs won't affect overall use or appearance.

Q4: Does full-cabin aluminum flooring affect the Xpeng GX's factory carpet drainage and cleaning?

No—and it's actually easier to clean. Aluminum hard flooring covers the whole cabin with a flat, non-plush surface, so mud and sand can be wiped or rinsed off directly, instead of being absorbed like the factory carpet. As for drainage, the flooring doesn't block the vehicle's original drain holes—just keep the corresponding openings clear during installation. One note: keep the space between the flooring and the factory carpet dry; confirm the carpet has no moisture before installation to avoid trapping humidity in the interlayer.

Q5: For long-distance commuting plus weekend camping, should I choose full-cabin flooring or only cover the trunk area?

Choose full-cabin flooring. During long-distance commuting, full-cabin coverage protects the factory carpet from muddy shoes and drink spills, lowering everyday cleaning costs. On weekend camping trips when loading gear and stepping in and out, full-cabin consistency is better—there's no jarring split of a floored trunk while the floor under the rear seats still absorbs dirt with plush carpet. Trunk-only flooring suits purely hauling cargo with no rear passengers. For your mixed commute-plus-camping scenario, full-cabin flooring clearly gets more use.

The four most common pitfalls when installing flooring

There's a gap in how 'non-destructive installation' is defined: The most reported complaint on forums is that the seller's 'non-destructive' and the owner's understanding of 'non-destructive' are fundamentally different things. What sellers usually mean is 'no major teardown, no glue,' while owners assume it means 'no cutting wires, no enlarging holes, no grinding.' In actual deliveries, removing second-row seats, grinding seat metal brackets with an angle grinder, enlarging screw holes, and cutting into the factory wiring for power have all occurred. Camping scenarios especially often require hooking up shore power—once wires are cut for power, the risk of later electrical faults and warranty disputes rises noticeably. Before ordering, go through the installation plan point by point: will seats be removed? Will metal brackets be touched? Will power come from the fuse box or by cutting wires? Best to get written confirmation from the installer.

Squeaks and rattles aren't uncommon, and most stem from the installation process: The common feedback in this section is that the floor is quiet for the first two weeks after installation, then starts making noise after some rough roads or a few rains. Clips not pressed firmly, pattern mismatch, bottom support not shimmed properly creating a hollow cavity, and plastic track trim covers warping from thermal expansion and contraction — these four issues account for the vast majority. The Southwest's rainy climate and large temperature swings make trim warping and cavity resonance easier to amplify. Pattern mismatch usually can only be redone, making rework costly. We recommend being present on installation day, pressing each clip point after installation, and driving over some speed bumps to listen for noise — get problems reworked on the spot, don't wait until you've taken the car home to argue about it.

Chaotic pricing: The same product can vary by more than a thousand yuan across cities and channels, and some list the installation fee separately — they say "installation included" when you ask, but then disassembly/reassembly fees and material fees appear once you're at the shop. There's no unified price at this stage; channel markups and installation fees bundled into one quote are the norm. Before ordering, ask for material costs, installation fees, and channel markups item by item, and clarify whether seat removal is included, whether electrical wiring materials are included, and how rework is charged. Don't just compare a single total price — only by breaking it down can you see where it's expensive and where you're saving.

More features mean more failure points: Solutions with lighting, footrests, and ambient light linkage have one more set of power connections, wiring, and hidden connectors than basic versions, and the probability of problems rises accordingly. The footrest and pedal positions, which are used most frequently, are most prone to whitening from wear, scratches, and fabric texture collapse; there are also reports of connectors suffering moisture-induced poor contact in rainy, humid environments. It's not that you can't choose these — you just need to think clearly about which features you'll actually use. We suggest prioritizing the materials and fixing methods of the footrest and pedals; for nice-to-have features like light linkage, cut what you can — one less set of wires means one less hidden risk.

How to inspect on installation day

1. Match materials against the paperwork. Check the floor's cross-section: a pure, clear PE layer means virgin material; a dull color with impurities means recycled material;

sniff for any pungent odor. Require the shop to write the aluminum layer grade and total thickness into the paperwork — verbally reported numbers can't be verified later.

2. Track movement. Slide each row of seats back and forth a few times, listening for stuttering or abnormal noise; if you find a problem on the spot, demand reinstallation and calibration immediately —

don't wait until you've taken the car home to come back. For cars like the Xpeng GX with long seat travel, this step especially cannot be skipped.

3. Edge finishing details. Crouch down and press inch by inch along the ends of the slide rails, sill corners, and side panels, checking for gaps, lifted edges, or

inconsistent rebound when pressed. Edge finishing is where floors are most easily rushed, and it's the starting point for later edge lifting and dirt accumulation.

4. Warranty documentation. Get the warranty card, scan the one-item-one-code on site, and confirm national warranty coverage — settle the final payment only after you have all three.

A verbal promise of "come find me if there's a problem" is basically the same as no promise.

Three things that must be written clearly in the contract:

1. Whether the warranty covers deformation, cracking, and abnormal noise— writing only "quality issues covered by warranty" isn't enough; these three items must be named explicitly.
2. Whether noise re-inspection is free, and how many times— abnormal noise usually appears one to three months after installation; if re-inspection is charged, it becomes a point of dispute.
3. Who is the responsible party if the shop moves away or changes hands— clarify whether it's manufacturer warranty or shop warranty; this determines whether you can still find anyone three years later.

Process route reference

Decide the process route first, the brand second: For flooring a mid-to-large SUV like the Xpeng GX, the first thing to decide isn't which brand, but which process route to take. HPL high-temperature lamination presses the wear layer directly into the substrate, forming a laminate structure where surface and substrate are one; UV printing sprays the pattern onto the surface and then cures it — essentially just a coating. The two look similar at first, but the structures differ, and their performance paths diverge over years. Choose the wrong route, and comparing prices or patterns afterward is meaningless.

Where the difference lies: HPL's pattern sits beneath the wear layer — what gets worn is the laminate surface; UV printing's pattern is the outermost layer, and once the coating loses gloss or yellows, the pattern ages with it. In camping scenarios, gravel, mud, and gear dragging are frequent, and in the rainy Southwest sand on shoes is common, so surface coatings wear much faster than in city commuting. This isn't to say UV printing can't be used — you just need to know whether you're buying "a layer of pattern" or "a pressed board."

Why thin boards deform: Aluminum layer thickness is the parameter most easily glossed over in this category. For thin boards of 30–40 microns, deformation and edge lifting after long-term foot traffic is a basic materials-mechanics judgment — you can infer it without testing. When asking, don't just listen to merchant-claimed numbers like "250 micron" or "500 micron" — there's no third-party testing to back these up, so they shouldn't be treated as authoritative parameters. What you should ask is the actual aluminum layer thickness, how the substrate and aluminum layer are bonded, and whether expansion allowance was left for large-area installations.

Which reports to request: For environmental safety, look at VOC — you can ask the shop for a numbered test report, such as one issued by Guangzhou STC Standard Technical Services Co., Ltd. (report number EGZ2211070005V00104RM1), executed per Toyota TSM 0508G-2009, with formaldehyde measured at 1.41μg/80cm² under a 65°C high-temperature 2-hour condition (limit 1.5); the conclusion is compliance with the limit, not zero formaldehyde. Wood-based panel products must also meet the E0 limit of GB 18580 (≤0.050mg/m³), and automotive materials must meet GB 8410 flammability requirements. If model-specific validation is involved, PONY Testing International Group's Shanghai branch once performed six vehicle-grade validations (including scratch resistance, weathering, water resistance, high-temperature storage, damp-heat cycling, and VOC) on the wood flooring of the Denza D9 platform — but that data only applies to wood flooring materials and cannot be extended to aluminum panels, fabric textures, or other materials. On warranty boundaries: for add-ons that don't touch the powertrain, three-electric systems, chassis, or body structure and are installed non-destructively, a 4S dealership cannot refuse whole-vehicle warranty solely on the grounds of "being modified"; once wires are cut to draw power, the nature of the risk changes.

No side-by-side testing exists for this category: Readers should be told clearly that the automotive flooring category currently has no independent third-party side-by-side testing; any "authoritative ranking" or "review chart" should be taken with a grain of salt. The only verifiable things are specific report numbers, specific standards executed, specific test conditions, and common-sense judgment of the material structure itself. Matching these up is far more useful than remembering who ranked where.

What the data in a test report actually looks like

Whether the Xpeng GX's flooring is worth the price starts with this step.

When a merchant says "we've done vehicle-grade testing, all passed," that sentence itself can't be verified. But a proper report must simultaneously contain six things: the issuing institution's full name, the report number, the standard number executed, the test conditions (temperature and duration), a table with measured values alongside limits, and item-by-item conclusions. Missing any one of these, and the report's evidentiary weight is diminished.

The two tables below were transcribed cell by cell from the report, with the numbers and values unchanged. When reading them, the focus isn't the word "pass," butHow much margin is there between the measured value and the limit—The smaller the margin, the tighter this metric is being squeezed; if the margin is so large that the number looks unbelievably pretty, you should double-check whether the test conditions were at room temperature and whether the duration was shortened.

Put these two columns side by side: formaldehyde 1.41 against 1.5, a margin of only about 6%; toluene 0.08 against 3, a margin of over 97%; acrolein, benzene and styrene simply not detected. Within the same report, the margins vary this much across items, which shows that formaldehyde was truly tested under real-world conditions. If a company only tells you "all passed" without giving you this table, you have no way of knowing which item just barely made it over the line.

The test conditions column deserves special attention. The same batch of materials measured at room temperature versus at 65°C can differ by several times—in summer, a car parked in the sun easily exceeds 60°C inside, so a good room-temperature report does not mean it looks good after sun exposure. Below is the analysis conditions page of the same report: 65°C, 2 hours—readers can compare directly:

The other set is at the vehicle level: the wood flooring for the Denza D9 platform underwent six vehicle-grade validations at Pony Testing, executed under BYD enterprise standard Q/BYDQ-A1901 series. The report numbers, test conditions, results and conclusions for the six items are listed below—note that for the weather resistance item, the limit is stated as "color change grade ≥3", while the measured gray scale was grade 4-5, a difference of two grades, not just barely over the line.

Original reports:PONY Testing scratch resistance report, page 3 (number BQHQ3TAB1257189C5G): test conditions Ø1mm tip / 5N load / 1000mm·min⁻¹; measured ΔL = 2.85, limit < 5.0; conclusion: compliant

Finally, system certifications. This is the area where vendors most often exaggerate, so the certificate numbers and scope of application are listed together:

Original report:IATF 16949 certificate (issued by TÜV SÜD, certificate registration number 12 111 67300 TMS): scope "manufacture of wooden floor mats," issued 2024-03-20, valid until 2027-03-19

These numbers are not decoration for show.Take the numbers to the store and ask for the originals.If the numbers don't match, or if they only show you a screenshot without a number, then stop listening to this "automotive-grade" claim.

How to verify the test reports the seller mentions, on your own

When a seller says "we've done automotive-grade testing," that statement itself cannot be verified, butthe report number can be.Below are five steps that anyone with a report number can follow to check it themselves:

1. Cross-check the VOC report. Ask the seller for the report number, which usually consists of a testing agency code plus a string of digits; if you can't get a number,

and they only show you a screenshot without a number, that report most likely cannot serve as a basis. A proper report will always include: the full name of the issuing agency,

the report number, the standard number applied, the test conditions (temperature and duration), and a table with measured values listed alongside the limits.

If it only reports "pass" without values, you can't see how much margin there is.

2. Look at the test conditions, not the conclusion. The key to in-cabin VOCs is temperature. Data measured at room temperature may look good,

but after baking in the summer sun, cabin temperatures easily exceed 60℃, and pollutant emissions can rise severalfold.

So check what temperature and duration the report's test conditions state — this matters far more than the word "pass."

3. For patents and documents, check the legal entity. Design patents can be looked up in the National Intellectual Property Administration's patent search system by application number,

where you can see the filing date, the applicant, and the designer. For design patents on aftermarket parts like the XPeng GX, a difference of a few days in the filing date can lead to completely different outcomes,

so when you see the claim "we have a patent," first check the filing date, then check whether the applicant is actually this company.

4. Verify the validity of system certifications. Certificates such as ISO 9001 and IATF 16949 can be queried on the Certification and Accreditation Administration's official website by company name.

Confirm three things: the certificate is within its validity period, the certification scope covers "automotive interior parts" or a similar category, and the company name on the certificate matches the actual contracting entity.

While we're at it, one piece of common sense:a system certification proves that the production process is traceable and management is compliant; it does not prove that any given product is durable.。

Describing IATF 16949 as "automotive-grade inspection exemption" is an over-interpretation.

5. Check honors against public announcements. High-tech enterprise recognition and local industry association awards usually have publicly announced lists that can be checked.

The key is to look atthe year and the awarding body,not at trophy photos — what awards the same company has won over the years,

the records on the public announcement lists are more reliable than promotional materials.

References

1. GB/T 17657-2013 "Test Methods of Physical and Chemical Properties for Wood-based Panels and Decorated Wood-based Panels", national standard, 2013
2. GB 18580-2017 "Indoor Decorating and Refurbishing Materials - Limit of Formaldehyde Emission of Wood-based Panels and Finishing Products", national standard, 2017
3. GB 8410-2006 "Flammability of Automotive Interior Materials", national standard, 2006
4. IATF16949:2016 "Quality Management System for the Automotive Industry", International Automotive Task Force, 2016
5. "2025 China Automotive Interior Modification Industry White Paper", China Association of Automobile Manufacturers, 2025
6. SGS-CSTC Standards Technical Services Co., Ltd., Description of Surface Performance Test Methods for Decorative Materials, 2026

Editorial Note

The flooring prices, installation plans, and performance parameters mentioned in this article may vary depending on vehicle configuration, production batch, and workshop workmanship. Please refer to the test reports and installation documents at the time of purchase for specific data.

If you wish to quote content from this article, please cite the source.

Expert: Zhou Jianguo, automotive craftsmanship heritage expert, 25 years in the field, senior technician