PVA sponge roller is an indispensable material in the manufacturing process of PCB machine, and its unique absorbent and liquid absorbent properties play an important role in the field of electronic manufacturing. As a highly absorbent material, absorbent quilts are widely used to clean, dry and maintain the working environment of equipment, thereby improving production efficiency and ensuring product quality.
According to the different use of the environment, in addition to PVA sponge, there are PU sponge roller, PVC sponge roller, PP sponge roller, PO sponge roller, EPDM sponge roller and brush materials to choose from, the following is the introduction of different materials of sponge roller, as well as their advantages and disadvantages and the difference between the use of the environment.
Function
Remove water: In the PCB production process, the circuit board may need to go through cleaning, welding or other wetting processes, then you need to use absorbent cotton to absorb excess water to avoid moisture residue affecting the quality of the circuit board.
Protect the surface of the circuit board: While absorbing water, absorbent cotton can reduce friction and damage to the surface of the circuit board, avoiding scratches or other physical damage during the cleaning process.
Improve production efficiency: Absorbent cotton can quickly absorb moisture, reduce drying time, and improve the efficiency of the production line.
Feature
Absorbent: Absorbent cotton is usually made of superabsorbent materials such as microfibers, non-woven fabrics, etc., which can quickly absorb water and keep it difficult to drip.
Soft and dust-free: In order to avoid secondary pollution during cleaning, absorbent cotton must be kept soft and dust-free to avoid tiny fiber particles sticking to the circuit board.
High temperature resistance: Because the production process of the circuit board often involves heat treatment, the absorbent cotton needs to have a certain high temperature resistance to ensure that it will not be damaged or release harmful substances under heating conditions.
Usage
PCB cleaning: In the PCB production process, after the cleaning process, it is necessary to use absorbent cotton to quickly clean up the residual water.
Cleaning after welding: In the process of wave soldering, reflow welding, etc., there may be excess flux and moisture on the surface of the circuit board, and absorbent cotton can be used to wipe and clean.
Storage and transportation protection: During the storage and transportation of the circuit board, absorbent cotton can be used to absorb moisture and prevent short circuit or corrosion of the circuit board due to wet environment.
Selection criteria
Absorbent capacity: Select the right absorbent cotton according to the production needs to ensure that it can quickly and effectively absorb water.
Size and shape: According to the actual application needs, the size and shape of absorbent cotton may be different, generally in roll, sheet, strip and other forms.
Harmlessness: The absorbent cotton material is non-toxic and does not contain components that may damage the circuit board, such as heavy metals and chemical solvents.
Type
- PVA Sponge Roller
Product introduction:
Sponges have good elasticity, water absorption rate of 8-10 times (self-weight), do not open glue, do not drop slag, solvent resistance and weak acid and alkali can be good, white and soft appearance, after special anti-mildew treatment, will not mold within 6 months.
Product Feature:
Our PVA sponge roller technology, process and management model are all from Taiwan, and the main raw material of PVA is imported from Japan and Taiwan. Its characteristics include strong toughness, resistance to friction and not easy to drop chips.
Product Note:
No moisture PVA sponge is dry and hard. Soak the foam roller in water for more than 2 hours before use, and squeeze the foam roller internal hard block completely, squeeze out too much water and then install it on the machine (do not put the dry and hard PVA sponge roller directly on the machine).
Product Data Sheet:
Physical Features | |
Specific Gravity | 0.1~0.15%/cm³ |
Pore Ratio | 90% |
Water-retention Ratio | 13 Times |
Hole Size | 60~130μ |
Stretchability | 4kg/c |
Extensibility | 300% |
- PU Sponge Roller
Product introduction:
The PU sponge roller is made from polyurethane and utilizes advanced Japanese continuous ultra-fine foaming technology.
Product Feature:
The material exhibits strong water absorption, is resistant to cracking, demonstrates excellent durability against abrasion, and does not shed particles.
Product Note:
Suitable for specialized cleaning sponges for semiconductor wafers.
Product Data Sheet:
Physical Features | |
Pore Diameter | 5~10μ |
Pore Ratio | 80% |
Water-retention Ratio | 300% |
Specific Gravity | 0.26/cm³ |
Max temperature | 120 |
Stretchability | 13.0kg/cm³ |
Ductility | 400% |
Hardness | 10° |
- PVC Sponge Roller
Product introduction:
PVC sponge roller adopts advanced ultrafine continuous foaming technique in Japan, which is not easy to drop chips, has high tensile strength and is not easy to deform. Good drug resistance, for general organic solvents have chemical resistance, long-term exposure to acid and alkali solution is not easy to change.
Product Feature:
With high foaming density and continuous foaming technology, it has excellent acid and alkali resistance and durability. In the dry state can maintain elasticity and softness, and not dry hard, no need to add water moisturizing.
Product Note:
The outer diameter error of the PVC sponge roller is 5% of the soil, more than 10 days of impregnation in water, there will be 10% expansion error of the soil, and the above test is 10 days of external roundness and elasticity.
Product Data Sheet:
Physical Features | |
Specific Gravity | 0.35~0.37g/cm³ |
Pore Ratio | 73%-75% |
Water-retention Ratio | 280% |
Hole Size | 2~50μ |
Temperature | 60 |
Extensibility | 125~131% |
- PO Sponge Roller
Product introduction:
PO sponge roller adopts Japan's advanced ultrafine continuous foaming process. Polyurethane is used as raw material. Mainly used in circuit board, inner board, liquid crystal display and etc.
Product Feature:
Corrosion resistance, no hardening, drug resistance, hydrophilicity.
Product Note:
After use, use a container (kettle) to pour tap water on the PO roller on the machine, and then squeeze the dirt on the PO sponge roller by hand. The roller does not need special water supply, will not dry in the state of no water, and will always maintain the roundness and elasticity of the roller appearance.
Product Data Sheet:
Physical Features | |
Pore Diameter | 60μ |
Pore Ratio | 75% |
Max temperature | 70 |
Tensile strength | 420 |
Ductility | 200% |
Hardness | 15° |
- PP Sponge Roller
Product introduction:
A new product specially developed for the chemical extrusion fluid of base plate. Using polyethylene as a chemical bridge, improved polymer structure of the micro foam.
Product Feature:
Heat resistance, alkali resistance, wear resistance, acid resistance.
Product Note:
When not in use, it should be often maintained in clean water to avoid deformation. The use environment should not exceed 80°C, which will shorten the use period. Daily squeeze cleaning with water can increase the service life of the sponge roller and maintain the roundness and elasticity of the roller.
Product Data Sheet:
Physical Features | |
Specific Gravity | 0.031g/cm³ |
Tensile strength | 1.6kg/c |
Ductility | 220% |
Max temperature | 60 |
Compression ratio | 7.8% |
- EPDM Sponge Roller
Product introduction:
Vertical plating line accessories can play a role in water retention.
Product Feature:
Acid and alkali resistance, corrosion resistance, good elasticity, no damage to the board durable. Customized according to user needs.
Product Note:
When not in use, it should be often maintained in clean water to avoid deformation. The use environment should not exceed 80°C, which will shorten the use period. Daily squeeze cleaning with water can increase the service life of the sponge roller and maintain the roundness and elasticity of the roller.
Product Data Sheet:
Physical Features | |
Specific Gravity | 0.033g/cm³ |
Tensile strength | 1.8kg/c |
Ductility | 220% |
Max temperature | 65 |
Compression ratio | 7.5% |
According to the different environment used, the selection of material requirements is also different, the following is the comparison between the advantages and disadvantages of different materials:
Material | Advantages | Disadvantages | Usage scenario |
PP | - Light weight, chemical resistance - Low cost - High temperature resistance | - Poor water absorption - Low elasticity, may wear faster | Scenarios that require chemical resistance but do not require high water absorption |
PVA | - Super absorbent - High softness, not easy to scratch the surface - Good antibacterial | - Poor chemical resistance - Easy to age at high temperatures | High water absorption required for cleaning purposes |
PU | - Excellent elasticity - Good wear resistance - Medium absorbent | - Medium chemical resistance - Drop may occur in some solvents | Multi-purpose water absorption and buffering scenarios |
PVC | - Good chemical resistance - Soft texture - Low cost | - Poor environmental protection (chlorine) - Low water absorption | A scenario with corrosion resistance but low water absorption requirements |
PO | - Good environmental protection - Water absorption and chemical tolerance are moderate | - Poor wear resistance - Poor high temperature performance | Neutral water absorption requirements and environmental protection requirements |
EPDM | - Excellent aging resistance - Strong chemical resistance - Good flexibility, moderate water absorption | - Higher cost - Heavier | High temperature and chemical corrosion environment |
Sponge roller, as a key consumable in circuit board equipment, has been widely used in modern electronic manufacturing because of its excellent absorbent ability, chemical resistance and environmental protection characteristics. The selection of high-quality absorbent cotton can not only improve the cleaning and maintenance efficiency of the equipment, but also effectively reduce the equipment loss and improve the stability of the production process. And how to choose the right choice of material, is a very important step.
