Chain-store category planners frequently ask whether to lead with 豆腐, ベントナイト, 、または キャッサバ — and how to balance all three in a single 20GP container. This article gives a substrate-by-substrate comparison covering dust, clumping, biodegradability, flushability, freight cost, and consumer positioning — so you can choose the right SKU mix for your market.
The three substrates at a glance
| Property | Tofu (soybean residue) | Bentonite (sodium clay) | Cassava (tapioca starch) |
|---|---|---|---|
| Origin | Food-grade soybean residue (by-product of tofu / soy milk production) | Mined Wyoming-grade sodium bentite | Cassava root starch (food industry by-product) |
| 粉塵含有量 | < 3.0% (post-extraction) | < 0.5% (low-dust grade) | < 0.3%（抜歯後） |
| 凝集速度 | 3秒（硬質、速硬化型） | 3 seconds (rock-hard) | 3–5 seconds (firm) |
| 凝集強度 | 290～480 g/cm² | 290～480 g/cm² | 290～480 g/cm² |
| 脱臭率 | 88–92% | 88–92% | 88–92% |
| 吸水性 | > 600% | > 300% | > 650% |
| トイレに流せる | Yes — small clumps, residential plumbing | No — mineral clay | Yes — small clumps, residential plumbing |
| 生分解性（OECD 301B） | 92–98% | 0% (mineral, not biodegradable) | 92–98% |
| 堆肥化可能 | Yes (industrial) | いいえ | Yes (industrial) |
| pH | 6.5–7.5 (cat-safe) | 8.5–9.5 (alkaline) | 6.0–7.5 (cat-safe) |
| かさ密度 | 0.45–0.60 kg/L (lightweight) | 0.75–0.88 kg/L (heavy) | 0.75–0.88 kg/L (medium) |
| Track behaviour | Low (lightweight pellets) | 低（重い粒が足から落ちてしまう） | 低（重い粒が足から落ちてしまう） |
| Scent profile | Light natural soybean + 7 fragrance options | 8 fragrance options (no natural scent) | Light natural + 7 fragrance options |
| こんな場合に最適 | Eco-positioning, sensitive cats, multi-cat households, all-region export | Heavy-clump performance, low dust, traditional clumping market | Eco-positioning, flushable claim, lightweight freight |
Which substrate wins on each metric
- Lowest dust: Cassava (<0.3%) > Bentonite (<0.5%) > Tofu (<3.0%)
- Strongest clump: Bentonite (rock-hard) > Tofu ≈ Cassava (290–480 g/cm²)
- Best deodorization: Tofu ≈ Bentonite ≈ Cassava (all 88–92%)
- Most flushable: Tofu & Cassava (residential plumbing) > Bentonite (not flushable)
- Best biodegradability: Tofu & Cassava (92–98%) > Bentonite (0%)
- Cat-safest pH: Tofu (6.5–7.5) & Cassava (6.0–7.5) > Bentonite (8.5–9.5)
- Lightest freight: Tofu (0.45–0.60 kg/L) — more product per cubic meter
- Best for kittens / seniors / post-surgery cats: Tofu & Cassava (gentle pH, no phenols)
How to balance all three in a single 20GP container
For a chain-store category reset that covers eco-positioning + traditional clumping + sensitive-cat households, the typical split is:
- 12 T tofu (≈65% of 20GP) — flagship eco SKU, fastest-growing export line
- 6 T bentonite (≈30% of 20GP) — traditional clumping SKU, anchor for chain-store shelves
- 2 T cassava (≈10% of 20GP) — secondary eco SKU, flushable claim
This mix gives you the broadest consumer coverage — eco-conscious buyer pulls tofu, traditional buyer pulls bentonite, flushable buyer pulls cassava — under one Cat Global label and one document set.
Market positioning by region
- South America (Brazil, Chile, Argentina): tofu leads growth; bentonite still anchors traditional shelves. 12 T tofu / 6 T bentonite split.
- Southeast Asia (Philippines, Thailand, Indonesia): tofu dominates new SKU launches; bentonite and cassava split the remainder. 10 T tofu / 6 T bentonite / 4 T cassava.
- Middle East (Saudi Arabia, UAE): bentonite + tofu (rose / lavender fragrance SKUs). 10 T bentonite / 10 T tofu.
- Europe (Germany, France, UK): tofu + cassava for eco-positioning; bentonite on a smaller SKU. 8 T tofu / 8 T cassava / 4 T bentonite.
- Oceania (Australia, NZ): tofu + cassava for eco + flushable claim; bentonite for traditional buyers. 10 T tofu / 6 T cassava / 4 T bentonite.
Which one should you lead with?
Three rules of thumb:
- If your market is eco-conscious (Germany, Australia, urban Brazil, Singapore): lead with tofu, support with cassava.
- If your market is traditional clumping (most of Middle East, much of South America, parts of Southeast Asia): lead with bentonite, support with tofu for new SKU launches.
- If your market is premium / multi-cat / sensitive-cat (UK, France, urban Saudi Arabia, urban Australia): lead with tofu, support with bentonite and cassava for full category coverage.
Cat Globalは、 豆腐猫砂メーカー そして 豆腐猫砂のサプライヤー that runs all three substrates on one Dalian factory floor — and ships mixed-SKU containers to all 5 core regions. For the full SKU matrix and pricing per lane.
