A plastic strainer manufacturer moulds the small baskets, sieves and stoppers that keep food scraps and hair out of kitchen and bathroom drains. Also sold as sink strainers or waste baskets, these drop-in polypropylene accessories are not plumbed fittings, and the kitchen drain strainer pp programs split into two designs: a plain perforated sink strainer basket and a basket with a silicone sealing ring that doubles as a stopper. This guide covers materials, sizing and what to confirm.
What a Plastic Strainer Manufacturer Moulds
The mainstream product is a one-piece injection moulded PP basket sized for a standard sink waste: outer diameters of 60, 70 and 90 mm are the workhorse sizes, with 35 and 45 mm inner diameters and 10 to 12 mm depths. Perforations or a fine mesh around 2 mm capture debris while letting water through, and a lift tab eases removal. The stopper variant adds a silicone ring that seals against the waste flange when pressed down, so one accessory strains during washing and holds water when filling. Because the parts sit in constant contact with hot water and food acids, material choice is about heat resistance and compliance, not strength.
- Outer diameter 60 / 70 / 90 mm to match standard sink wastes
- Food-grade PP body, BPA-free, with optional silicone seal ring
- Dishwasher safe and rust-proof, unlike metal alternatives
Materials for a Kitchen Drain Strainer PP Program
Polypropylene is the default because it handles normal kitchen temperatures, resists food acids and alkalis, will not rust like metal strainers and costs a fraction of stainless at volume. Plants supplying retail and foodservice channels specify food-contact-grade, BPA-free resin with FDA or LFGB migration-test documentation on request, which also matters when a pp kitchen strainer is sold into the EU. Silicone rings are moulded separately and press-fitted or over-moulded, and colour is matched across batches; finishes run from gloss white to metallised chrome-look plating.
Sizing and Fit
Fit is the number-one return reason in this category. The basket must clear the waste flange without falling through, seal evenly when used as a stopper, and leave enough open area that a full sink still drains at a practical rate. Buyers should match the outer diameter to the waste size — 90 mm wastes with a 40 mm outlet are common in UK and EU kitchens, while North American standards use 3 1/2 inch openings.
What to Confirm with a Plastic Strainer Manufacturer
Ask for the resin grade and food-contact documentation, the seal-ring material and its compression set, and a fit sample against your actual waste fitting. MOQ for stock sizes starts near 1,000 pieces with 15 to 20 working-day delivery; custom colours, metallised finishes or bespoke perforation patterns raise MOQ and add tooling time. Request a wash-and-drain test report plus colour masters before volume. Adjacent kitchenware sits in our plastic products range, custom molding services cover bespoke shapes, the food contact compliance guide explains FDA and LFGB documentation, and the company directory lists partner plants.
Related product categories
The materials and part types discussed above are grouped in our sourcing directory:
