Foam sealant, also known as polyurethane foam sealant, is widely used as an energy-saving, environment-friendly and convenient building decoration material for sealing, sealing, word filling and other aspects. However, the product characteristics, efficacy, and how to use of foam sealant are not very clear. As a person in the manufacturing industry, the web editor will tell you today just for your reference.

1. Introduction to foam sealant

1.1 Definition and efficacy

Foam adhesive (also known as foam jointing agent of polyurethane material) is a kind of one component, moisture curing, multi-functional foamed polyurethane filling and ductile rubber seal. The polyurethane foam joint sealer is a unique polyurethane product that is filled with polyurethane prepolymer, foam adhesive, metal catalyst and other components in a compression aerosol tank. During construction, the aerosol solution is sprayed onto the construction site using a glue gun or manual nozzle according to the supporting facilities, and the entire process of forming, polyurethane foaming, bonding, and sealing is carried out in a short period of time. Its cured foam polyurethane elastomer has excellent characteristics such as bonding, moisture-proof, heat resistance, expansion and contraction, heat insulation, heat insulation, sound insulation, noise reduction and even flame retardancy (limited to flame retardancy). It is widely used for filling and sealing at the edge joints of building glass, deformation joints of prefabricated components and holes.

1.2 Characteristics

The general drying time is within ten minutes (at an indoor temperature of 20 ℃ in a natural environment), and the full drying time varies depending on the working temperature and environmental humidity. In general, the full drying time is about 4-6 hours in summer, and 24 hours or longer in winter when the temperature is around zero degrees Celsius. Under all normal application standards (and when there is a soil layer on its surface), the service life of its service items is estimated to be no less than ten years, and the solidified foam body maintains stable ductility and cohesiveness within the temperature range of -10 ℃~80 ℃.

1.3 Operation method of foam sealant

① Eliminate wall or material surface waste, vegetable oil, and spray a small amount of mist water on the area to be filled

② Construction and application should be carried out within the temperature range of 0 ℃ to 40 ℃. If construction is carried out in severe cold seasons, it is proposed to heat the storage tank in a natural environment of 30 ℃ to ensure practical application results

③ Shake vigorously for at least one minute before construction, and keep the storage tank upside down continuously during construction

④ After each construction is completed, please use a specialized cleaning agent to clean a part of the external thread of the glue gun. After each continuous construction is completed, please use a specialized cleaning agent to clean all the rifling of the glue gun barrel to prevent solidification and blockage

⑤ Repair and laser cutting should be carried out after the foam is completely solidified and formed. Special attention should be paid to the fact that cutting off the skin of foam will reduce the compressive strength of foam and reduce the actual effect of sealing and moisture-proof of foam

This product is not resistant to ultraviolet light. It is suggested to further apply glue for covering and spraying.

1.4 Safety precautions

It is strictly prohibited to puncture or ignite fuel tanks and empty tanks. During construction, open flames and heat sources must be avoided. Fire is strictly prohibited during transportation and storage to prevent collisions and direct sunlight. The temperature of the fuel tank must not exceed 45 ℃;

Cannot be reversed. Under normal circumstances, the feeding tank contains working pressure, and improper handling can also pose a risk of explosion (or cracking);

Wear protective goggles and rubber gloves during construction, and ensure good natural ventilation;

If the foam accidentally touches your eyes and skin, please be careful to clean it with detergent immediately, and then clean it with cold water. If necessary, please see a doctor. Generally, the cured foam can only eliminate the reflectivity;

This product contains acrylic ester components, and the uncured colloidal solution is irritating. Keep the container and empty container out of reach of children to prevent accidents and risks. This product belongs to flammable and explosive dangerous goods. Transportation and storage should be carried out in accordance with relevant requirements. Please store the goods in a cool and dry place below 25 ℃, and the shelf life is generally around 9-12 months.

2. Machinery and equipment for production of foam sealant

At present, China has thoroughly grasped the secret formula and production technology of this type of product, and widely used fluorine free foam adhesive that does not damage the atmosphere. Except for some manufacturers who still use imported valve accessories, the raw materials for other supporting facilities have been domestically produced and manufactured.

The production of foam sealant is divided into two stages, one is the production stage (reaction tank shall be used), and the other is the canning stage

(To use filling machines, air compressors, and blocking vibration machines), please provide detailed introductions for each of them as follows:

2.1 Production Stage (Reaction Tank)

Machinery and equipment for production of foam sealant

The production machinery and equipment of polyurethane foam sealant are divided into two parts, one is the production of foam glue white material secret recipe, and the other is the canning of raw materials. Companies with large-scale production can choose to produce their own white materials to save costs, while companies with small-scale taxpayers can immediately purchase white materials. The production machinery and equipment for white materials are mainly based on reaction tanks, also known as tank trucks, to maintain the heating, volatilization, cooling, and low-speed mixing functions specified in the processing technology. Add various raw materials of white material to the feeding vessel for sufficient mixing to obtain white material finished products. The machine equipment is shown in the diagram:

The emulsification reaction kettle is a machine equipment board structure, with an inner cylinder and business outsourcing. It is constructed by adding insulation materials in the middle and can be heated to 200 ℃. The raw materials for the machinery and equipment are all environmentally friendly stainless steel plates, cooled by circulating water cooling, and heated by cylinder clamps. The overall design is very personalized and highly executable. The transition section of the barrel body wall is connected in an arc shape to ensure that there are no blind spots in the environmental hygiene. It is widely used in the manufacturing industries of daily chemical products, pharmaceuticals, food, etc., such as the production and processing of detergents, shower gels, shampoos, cream skincare products, and food based apple sauce.

2.2 Canned stage (air compressor, fully automatic filling machine, barrier shaking machine)

2.2.1 Piston engine air compressor

An air compressor is a simple mechanical device that converts mechanical kinetic energy (electric motors, diesel engines) into aerodynamic energy.

This piston engine air compressor is a mechanical device that uses a crankshaft, engine crankshaft, and piston rod to produce high-pressure air in a closed container, resulting in air compression. Features: Items with a capacity of less than 4 cubic meters usually have built-in high-pressure vessels with simple fully automatic shutdown and start-up functions.

2.2.2 Model and specification of foam sealant production machine

This machine and equipment is specialized in filling polyurethane foam jointing agent for construction windows and doors, which can be divided into tubular type and gun type. This equipment is composed of 7 sets of equipment, including one white material automatic filling machine, one black history automatic filling machine, one gate sealing valve machine, dimethyl ether air pumping station, one propylene butane inflator, one raw material vibrator, and external thread capping machine. This machine equipment can be set up into any 1-6 workstations and composed according to industrial plant and employee standards.

This equipment is a pneumatic machine that does not require electricity and is driven by an air compressor. It has a high safety factor and only requires natural ventilation in industrial plants. But I need to pay attention to the safety of my production and not be careless.

Regulations on Production Industrial Plants

Fully automatic machine equipment can be set up with 1-6 workstations according to the specific regulations of the customer's processing plant, at least two people must be able to actually operate, and 5-6 people must actually operate. The more manual services there are, the higher the corresponding specific production volume will be. All the machinery and equipment do not take up much space, mainly for stacking raw materials, packaging, and finished products, which require indoor space. In fact, a total area of one or two hundred square meters can be built and put into operation.

2.2.3 Barrier type oscillating machine

The key structural types of the machine include a silo frame, a rubber support frame, a cylinder, and pneumatic components. The bin rack of the shaking machine can automatically perform repetitive movements under the control of air compression and pneumatic components. In this way, the goods in the bin rack will vibrate and shake under the push of the shaking machine, and the various raw materials in the commodity tank will immediately undergo sufficient mixing and reflection.