Custom Printable Adhesive Paper Materials Manufacturers

What is the lamination process of self-adhesive sticker materials? How to ensure the close fit between the surface material and the base paper (or release paper)?

Lamination process of self-adhesive sticker materials
1. Raw material preparation
The raw materials of self-adhesive stickers mainly include surface materials, adhesives and base paper (or release paper). The choice of surface materials depends on the purpose and printing effect of the sticker, such as paper, film, special paper, etc.; the adhesive is the core of the self-adhesive sticker, which is responsible for bonding the surface material and the base paper together, and sticking the surface material to the target object when in use; the base paper (or release paper) plays the role of supporting and protecting the adhesive, which is convenient for the storage, transportation and use of self-adhesive stickers.
Surface material selection: Select the appropriate surface material according to the application scenario and printing requirements of the self-adhesive sticker. For example, for application scenarios that require waterproof and oil-proof, synthetic paper or film surface materials can be selected; for application scenarios that require high gloss and printing effects, coated paper or coated coated paper surface materials can be selected.
Adhesive preparation: According to the properties of the surface material and base paper, as well as the use requirements of the self-adhesive sticker, prepare the appropriate adhesive. The selection and preparation of adhesives have an important influence on the stickiness, peeling performance and storage stability of self-adhesive stickers.
Preparation of base paper (or release paper): The base paper (or release paper) should have good smoothness, stiffness and moderate ink absorption to ensure the printing effect and peeling performance of self-adhesive stickers. At the same time, the base paper (or release paper) should also have a certain thickness and strength to support the surface material and adhesive, which is convenient for the storage and transportation of self-adhesive stickers.
2. Composite process
The composite process of self-adhesive stickers mainly includes three steps: gluing, compounding and curing.
Gluing: The prepared adhesive is evenly applied on the back of the surface material or the surface of the base paper (or release paper). The control of the amount of glue applied has an important influence on the stickiness and peeling performance of self-adhesive stickers. Too little glue application will result in insufficient stickiness, and too much glue application will result in difficulty in peeling or residual glue.
Gluing method: According to the production scale and gluing requirements, different gluing methods can be selected, such as roller coating, scraper coating, spraying, etc. Among them, the roller coating method is suitable for large-scale production, with the advantages of uniform glue coating and high efficiency; the scraping method is suitable for occasions with high requirements for the amount of glue coating, and the amount of glue coating can be accurately controlled; the spraying method is suitable for occasions with low requirements for glue coating accuracy, and has the advantages of simple equipment and convenient operation.
Composite: The surface material coated with adhesive is tightly bonded with the base paper (or release paper) to form a self-adhesive sticker. During the composite process, parameters such as temperature, pressure and speed need to be controlled to ensure the close fit between the surface material and the base paper (or release paper) and the full curing of the adhesive.
Composite method: Different composite methods can be selected according to different production equipment and material properties, such as hot pressing composite, cold pressing composite, etc. Among them, the hot pressing composite method is suitable for adhesives that require high temperature curing, which can increase the composite speed and bonding strength; the cold pressing composite method is suitable for temperature-sensitive occasions, which can avoid the deterioration or failure of the adhesive due to high temperature.
Curing: After the composite is completed, the self-adhesive sticker needs to be cured to fully cure the adhesive and form a stable adhesive layer. The control of curing time and temperature has an important influence on the viscosity and peeling properties of the self-adhesive sticker. Too short a curing time or too low a temperature will result in incomplete curing of the adhesive, affecting the stickiness and storage stability of the self-adhesive sticker; too long a curing time or too high a temperature will cause the adhesive to age or deteriorate, reducing the peeling performance of the self-adhesive sticker.

How to ensure the close fit of the surface material and the base paper (or release paper)
Ensuring the close fit of the surface material and the base paper (or release paper) is a key link in the production process of self-adhesive stickers. The following are some effective measures and methods:
1. Optimize the gluing process
Accurately control the amount of glue: Accurately control the amount of glue according to the properties of the surface material and the base paper (or release paper) and the use requirements of the self-adhesive sticker. Too little glue will result in insufficient stickiness, and too much glue will result in difficulty in peeling or residual glue. Therefore, the amount of glue needs to be regularly tested during the production process and adjusted according to actual conditions.
Choose a suitable gluing method: Choose a suitable gluing method according to the production scale and gluing requirements. For example, for large-scale production, roller coating can be selected to improve the efficiency and uniformity of glue coating; for occasions with high requirements for the amount of glue coating, scraping coating can be selected to accurately control the amount of glue coating.
2. Control of composite parameters
Temperature control: The temperature needs to be controlled during the composite process to ensure that the adhesive can fully cure and form a stable adhesive layer. Too low temperature will cause incomplete curing of the adhesive, affecting the viscosity and storage stability of the self-adhesive sticker; too high temperature will cause aging or deterioration of the adhesive, reducing the peeling performance of the self-adhesive sticker. Therefore, the composite temperature needs to be regularly tested during the production process and adjusted according to actual conditions.
Pressure control: Appropriate pressure needs to be applied during the composite process to ensure a close fit between the surface material and the base paper (or release paper). Too little pressure will result in loose fitting, affecting the printing effect and peeling performance of the self-adhesive sticker; too much pressure will cause deformation or rupture of the surface material. Therefore, the composite pressure needs to be regularly tested during the production process and adjusted according to actual conditions.
Speed ​​control: The speed needs to be controlled during the composite process to ensure that the adhesive can fully cure and form a stable adhesive layer. Too fast speed will lead to incomplete curing of adhesive, affecting the stickiness and storage stability of printable adhesive paper; too slow speed will reduce production efficiency and increase production costs. Therefore, it is necessary to regularly test the composite speed during the production process and adjust it according to the actual situation.
3. Strengthen quality inspection
Appearance inspection: Perform appearance inspection on printable adhesive stickers to check whether there are defects such as bubbles, wrinkles, scratches, etc. These defects will affect the printing effect and peeling performance of self-adhesive stickers, so they need to be discovered and handled in time.
Viscosity inspection: Perform viscosity inspection on self-adhesive stickers to check whether their viscosity meets the requirements. Too weak viscosity will cause the self-adhesive stickers to be unable to be firmly attached to the target object; too strong viscosity will cause difficulty in peeling or residual glue. Therefore, it is necessary to regularly test the viscosity during the production process and adjust it according to the actual situation.
Peeling performance inspection: Perform peeling performance inspection on self-adhesive stickers to check whether they are peeled smoothly and without residual glue. The quality of peeling performance directly affects the use effect and customer satisfaction of self-adhesive stickers, so it is necessary to strengthen inspection and control.
4. Use advanced technology and equipment
Introduce the Internet of Things and artificial intelligence technology: By introducing the Internet of Things and artificial intelligence technology, accurate control of the production process and optimal resource allocation can be achieved. For example, use sensors to monitor parameters such as temperature, pressure, speed, etc. in the production process in real time, and optimize and adjust them through intelligent algorithms; use machine vision technology for quality inspection to improve inspection efficiency and accuracy.
Use high-precision composite equipment: The use of high-precision composite equipment can ensure the close fit between the surface material and the base paper (or release paper) and the full curing of the adhesive. For example, the use of hot pressing composite equipment can achieve rapid composite and curing under high temperature and high pressure; the use of cold pressing composite equipment can avoid the deterioration or failure of the adhesive due to high temperature.
5. Strengthen raw material management
Strictly screen raw materials: Selecting raw materials with reliable quality and stable performance is the basis for ensuring the quality of self-adhesive stickers. Therefore, it is necessary to strictly screen raw materials during the production process, and test and evaluate their performance.
Reasonable storage of raw materials: Reasonable storage of raw materials can avoid moisture, deterioration or damage. For example, store raw materials in a dry, ventilated, and light-proof environment; regularly check and replace raw materials, etc.
The lamination process of printable adhesive sticker paper materials is a delicate process involving multiple procedures. By optimizing the gluing process, controlling the lamination parameters, strengthening quality inspection, adopting advanced technology and equipment, and strengthening the management of raw materials, we can ensure the close fit between the surface material and the base paper (or release paper) and the high-quality production of printable adhesive paper. As one of the earliest domestic companies producing self-adhesive sheets and paper materials, Shanghai Baozhongbao Adhesive Products Co., Ltd., relying on its advantages in scientific research, production, sales and service, continuously introduces new technologies and processes to improve product quality and production efficiency, and provide customers with better self-adhesive sticker products and services. At the same time, the company is also actively developing environmentally friendly products such as new bio-based adhesives and fully degradable label materials to help customers achieve environmental protection goals throughout the entire life cycle of packaging.