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D1029-95 – Standard Test Method Technical Guide
ASTM D1029-95 outlines a standard test method for evaluating the peeling resistance of paper and paperboard, focusing on linerboard intended for corrugated or solid fiber containers. This test assesses the material’s resistance to surface lifting and quill formation under controlled rubbing conditions.
📐 Specimen Preparation and Conditioning
According to Section 2.1, sampling must follow Practice D585 for a representative lot. Conditioning is performed per Practice D685 at standard atmospheric conditions (23°C ± 1°C and 50% ± 2% relative humidity) to stabilize moisture content. Test specimens should be cut to the required size (e.g., 6 x 6 in. or larger) and must be free of defects. Proper conditioning is vital as moisture content directly impacts peeling behavior.
⚙️ Test Apparatus and Procedure
The testing apparatus, described in Section 5, consists of a motor-driven machine with a reciprocating or circular arm attached to a smooth flat plate. The moving plate, weighing 12 lb (5.4 kg), slides over a fixed plate at 40 to 60 double strokes per minute. Each stroke is 6 in. (152 mm) in one direction, totaling 12 in. (305 mm) per double stroke. Clamps hold two specimens in contact, and both plates feature beveled edges to avoid cutting the paper.
Table 1 summarizes critical apparatus specifications:
| 🟦 Parameter | 📏 Value | 🎯 Unit |
|---|---|---|
| Cycle Rate | 40–60 | double strokes/min |
| Upper Plate Weight | 12 (5.4) | lb (kg) |
| Stroke Distance | 6 (152) | in. (mm) |
| Total Travel per Double Stroke | 12 (305) | in. (mm) |
A thin layer of sponge rubber is recommended for both plates to ensure uniform contact. The drive mechanism must minimize lateral movement, and a counter tracks the number of double strokes. The test is run until quill formation is observed or a specified number of cycles is reached.
📊 Key Measured Properties
The main property is peeling resistance, defined as the tendency of the paper surface to lift and roll into quills under rubbing action (see 3.1). This is distinct from abrasion. The test is not intended to determine failure but to identify quill formation. Factors such as pulp refining on the paper machine and moisture content at combining significantly influence results.
⚠️ Safety: Per Section 1.2, users must establish safety and health practices before use. Ensure the machine is operated in a well-ventilated area and that all safety guards are in place.
💡 Technical Note: Note 1 indicates that peeling tendency is often observed on corrugator combiners and conveyor systems. This test simulates such rubbing conditions to predict real-world performance.
❓ Frequently Asked Questions
🔍 What is the primary application of ASTM D1029-95?
This test is specifically designed for linerboard used in corrugated containers to evaluate its resistance to peeling during handling and conversion processes.
💡 How does the test apparatus simulate peeling conditions?
The motor-driven machine cycles a weighted plate over a fixed plate at a controlled rate, replicating rubbing forces that cause surface lifting in paperboard.
⚡ What distinguishes peeling from abrasion?
Peeling involves the formation of quills (rolled fibers) from surface lifting, while abrasion produces fine powdered fibers. This test focuses on peeling, not abrasion.
📌 Why are specimen dimensions important?
Specimens must be of sufficient size to fit the clamps and ensure consistent contact. If smaller specimens are used, the upper plate weight may need adjustment per Note 2.