The roller material of the roller mixer directly affects the adaptability, durability, and sample safety of the equipment, and needs to be selected based on the experimental scenario (such as sample type, container specifications, temperature requirements). The following are the characteristics, applicable scenarios, and selection suggestions of mainstream roller materials: 1. Mainstream roller materials and core characteristicsSiliconeFlexible material, Shore hardness 40-60 °, temperature resistance range -50 ℃~200 ℃, strong chemical inertness

advantage

1. Anti slip and shock-absorbing, fitting the outer wall of the centrifuge tube/blood collection tube to avoid container sliding;

2. Resistant to weak acids and bases, not easy to adsorb sample residues;

3. Does not harden in low temperature environment, suitable for refrigeration mixing experiment

局限性

1. Not resistant to strong solvents (such as acetone and toluene), prone to swelling and aging;

2. Long term high temperature (>150 ℃) use is prone to deformation | Polyurethane (PU) | Moderate elasticity, Shore hardness of 60-80 ° C, temperature resistance range of -20 ℃~120 ℃, excellent wear resistance

1. Tear resistant, wear-resistant, long service life, suitable for high-frequency continuous operation;

2. Resistant to oil and weak solvents, suitable for mixing samples containing oils and fats

1. It is prone to brittleness at low temperatures (<-10 ℃) and may scratch the container;

2. Easy to age in strong acid and alkali environments | Stainless steel (304/316L) is a rigid material with a temperature resistance range of -200 ℃~600 ℃ and a high corrosion resistance level

advantage

1. High temperature resistance, strong acid and alkali resistance, strong solvent resistance, suitable for harsh experiments such as chemical synthesis and digestion;

2. The surface is smooth and easy to clean, and can be sterilized at high temperatures;

3. Good load-bearing capacity, suitable for large volume containers (such as 50mL centrifuge tubes, reagent bottles)

shortcoming

1. Non elastic, needs to be used with anti slip rubber sleeve, otherwise the container is prone to slipping;

2. Metal has fast thermal conductivity, and is prone to condensation during low-temperature experiments. It is also prone to scalding containers during high-temperature experiments

|Fluororubber (FKM/Viton) | High performance elastomer, temperature resistance range -20 ℃~250 ℃, chemical stabilitygood

advantage

1. Resistant to strong oxidants and solvents (such as strong acids, bases, ketones, esters), suitable for special chemical experiments;

2. Resistant to high temperature aging, with a service life far exceeding that of silicone/PU|

shortcoming

1. High hardness (Shore 70-90 °), slightly inferior to silicone in terms of slip resistance;
2. High cost, only used for special scenarios

Hard plastic (POM/PA66) | Rigid material, temperature resistance range -40 ℃~120 ℃, lightweight design

advantage

1. Low cost, suitable for routine laboratory basic mixing operations;

2. Good insulation and no risk of metal thermal conductivity

shortcoming

1. Poor wear resistance, prone to wear and chip formation after long-term use;

2. Not resistant to strong solvents, prone to cracking and deformation | 2. Core principles for selection 1 Select based on the chemical properties of the sample - biological samples (blood, serum, nucleic acid), conventional aqueous solution ->silica gel: non slip and no dissolved substances to avoid contaminating the sample. -Oil and fat samples, weak solvent samples → Polyurethane: wear-resistant and oil resistant, not easily aged. -Strong acid, strong alkali, strong solvent samples (such as chemical digestion solution, organic solvent) → 316L stainless steel (with silicone sleeve) or fluororubber: strong corrosion resistance. 2. Select according to temperature requirements - low-temperature mixing (such as enzyme preservation, plasma separation,<0 ℃) → Silica gel: maintains elasticity at low temperatures and does not harden. -High temperature mixing (such as constant temperature incubation,>100 ℃) → Fluororubber or stainless steel: resistant to high temperatures and not easily deformed. -Normal temperature routine experiment → Silicone/Polyurethane/Hard Plastic: High cost-effectiveness. 3. Choose a small volume container (0.5mL/1.5mL centrifuge tube) according to the container specifications ->Silicone: Flexible fit small caliber container with good anti slip effect. -Large volume container (50mL centrifuge tube, reagent bottle) → Stainless steel: Strong load-bearing capacity, matched with rubber sleeve to prevent slipping. 4. Select based on usage frequency - high-frequency continuous operation (such as clinical batch testing) → Polyurethane/stainless steel: good wear resistance and long service life. -Low frequency intermittent use → Silicone/hard plastic: Low cost, meets basic needs. 3、 Additional precautions 1 Some models support roller replacement and can be equipped with multiple sets of rollers made of different materials according to different experimental needs, improving equipment versatility. 2. Silicone/polyurethane rollers should be cleaned promptly after use to avoid residual samples corroding the material; Stainless steel rollers can be sterilized at high temperatures (121 ℃, 30min), suitable for sterile experiments. 3. Avoid prolonged contact with strong solvents, such as silicone rollers that come into contact with acetone and need to be cleaned immediately, otherwise it will accelerate aging and cracking.

Guoli Tian Company adapts different rollers on different models based on the characteristics of these commonly used rollers and the needs of public users. We provide specialized treatment for customers according to their bottle rolling materials and specific experimental requirements.