wholesale blank canvas makeup bag factory

Factory production of canvas cosmetic bags can be divided into six core steps:

1. Material Pretreatment

Main Material Cutting

Canvas fabric is pre-shrunk according to the order weight (commonly 300D-600D Oxford fabric). A laser cutter precisely cuts custom-shaped pieces, and a hydraulic cutter handles straight lines. When cutting multiple layers of fabric, they must be secured with locating pins to prevent shifting and dimensional errors.

Supplementary Material Sorting

Zippers are selected with resin teeth for rust resistance. Hardware (magnetic buckles, D-rings) are inspected for plating integrity. The lining mesh undergoes a light transmittance test to prevent color variation.

2. Process

Main Structure Sewing

Industrial lockstitch machines use double-thread reinforcement to sew the main frame of the bag body. The speed is reduced at corners to prevent skipped stitches. Key stress points (such as the base of the handles) are reinforced with a triangular cross stitch.

Functional Component Integration

Inner pockets require a backstitched edge. Zippers are installed using a dedicated presser foot to ensure a 1.5mm gap between the seam and the zipper teeth for smooth operation.

III. Decorative Process

Surface Treatment

The hot stamping unit uses a heat transfer machine (180°C ± 5°C) to print the design, adjusting the pressure according to the canvas thickness to prevent burning. During the embroidery process, the stitch density is randomly inspected every 30 designs.

Three-Dimensional Binding

A bias-cut binding strip is used at the bag's hem to eliminate rough edges. High-frequency heat pressing ensures a tight fit between the binding strip and the canvas, enhancing edge wear resistance.

IV. Quality Control

Triple Inspection System

Initial Inspection: The first 20 products are fully inspected for dimensional tolerances and thread tension.

Process Inspection: 5 products are randomly inspected every hour, and the zipper durability is tested using a dynamometer.

Final Inspection: A light inspection station is used to check for thread ends ≥ 0.2mm and stains.

Physical Performance Testing: An oscillation impact test verifies handle firmness, and a friction test verifies print color fastness.

V. Packaging and Warehousing

Tiered Packaging Strategy

High-end products are individually packaged in PE film and corrugated boxes (with built-in desiccant). Regular products are packaged in 5-piece OPP bags, with moisture-proof labels marked on the outer boxes.

Intelligent Warehousing Management

Heavy-duty shelves are used for compartmentalized storage, and the system schedules items based on a first-in, first-out principle. Logistics documents and actual quantities are double-checked before shipment.

Process Warning: Canvas must be pre-shrinked before cutting, otherwise the finished product will easily deform when exposed to moisture. Exceeding the specified temperature for thermal transfer can cause carbonization of the fabric.

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