Nissha has developed a new injection molding technology called Pulp-Injection – using pulp instead of plastics. Pulp-Injection products have similar features and functions as injection molded plastic parts.
Initially Nissha started to produce trays for self-injection-devices, e.g. Tremfya/SelfDose. Now, Nissha has developed functional components, e.g. caps of self-injection pens.
As a first prototype of components, Nissha has developed a cap for Haselmeier’s D-Flex pen. The pulp-injection cap has the same design. Thin walls and inner undercut structure contribute to a detailed and complex product design with high dimensional accuracy.
The cap fits well on the original pen, with a tight fit ensuring it stays well on the main device. The pulp-injection cap is rigid and has high impact strength, with a tactile, silky material.
Pulp-Injection consists of mainly pulp and starch, which contributes to the reduction of usage of petroleum-based plastics. The products are recyclable in a paper recycling system and can be mixed with other used paper (according to PTS RH-021 standard test).
We carried out environmental tests under three conditions (Ⅰ.-40℃ 96h Ⅱ. 85℃ 96h Ⅲ.60℃90%RH 96h). We find no critical dimensional change and colour degradation on tested samples after these acceleration tests.
The Pulp-Injection has lower specific gravity by approx. 5.5% compared to Polypropylene material. This contributes to the reduction of CO2 emissions during transportation and in its cost.
