Recycled paper pulp is the most used molded pulp material in the world, and egg packaging is the reason. Made from 100% post-consumer recovered paper, its fibers have already been through several use cycles, which leaves them short at 0.8 to 1.5 mm. Short fiber is usually described as a weakness. In molded pulp it is an advantage: it flows into mold detail, drains predictably on the forming screen, and produces the most dimensionally consistent parts at the lowest cost in the range.
The characteristic gray-brown color comes from mixed recovered stock rather than from any pigment, and it varies with the incoming waste stream. For the applications this material suits, that variation is irrelevant. For anything appearance-critical, it is the reason to choose a different base.
The honest limitation is strength. Each repulping cycle shortens fibers and reduces bonding, so recycled pulp sits at the lower end of the strength range. Parts compensate through geometry rather than through fiber: ribs, cones, and curves carry load that a flat wall cannot, which is why a well-designed recycled part outperforms a poorly designed virgin one.
Egg packaging. Cartons and trays are the single largest molded pulp application worldwide and this is the material behind almost all of it. Detail reproduction, dimensional consistency, moisture regulation, and cost all align with what egg packaging needs. See 成形パルプ製の卵パック そして molded pulp egg trays.
High volume protective inserts. Where a part ships in millions and is discarded at receiving, cost per unit governs and this material wins on it.
Parts with complex internal geometry. Counterintuitively, the cheapest fiber reproduces intricate features best, because short fibers conform where long ones bridge.
Buyers reporting post-consumer recycled content. A 100% PCR claim is simple to substantiate and increasingly appears as a procurement requirement rather than a preference.
Where recycled pulp is the wrong call: direct food contact, which needs 晒しパルプ; load-critical structural parts, which need 堆肥化クラフト紙; and anything needing a pale or precisely reproduced color, which needs 晒しパルプ as a base. For color work generally, see カラーパルプ.
The nearest alternative is 段ボール紙, which draws from recovered board specifically rather than mixed paper. OCC gives more strength and a browner tone; mixed recycled gives finer detail.
プラスチックや発泡スチロールに代わる成型パルプ製品は、リサイクル可能で生分解性のオプションを提供します。特注の形状、色、環境に優しい表面加工も可能です。社内で試作と製造を行い、手頃な価格で持続可能なパッケージを提供します。
100%の再生材料から作られたドライプレス紙パルプトレーは、プラスチックに代わる環境にやさしく、費用対効果の高い製品です。クッション性、耐熱性、積み重ねが可能で、最大20%のスペースを節約できます。
ボニトパックは、95%の色精度で、ホワイト、ナチュラル、ブラックを含む6色の成形パルプを提供しています。環境にやさしい方法で、安全な漂白を実現しています。ナチュラルとホワイトは食品に最適で、その他はトレイ包装に適しています。
