Wet kraft tape is a special type of tape which is covered with a layer of wet kraft paper on the back. Wet kraft has excellent flexibility and tear resistance, making wet kraft tape widely used in packaging and sealing applications. Here is a detailed description of the production process of wet kraft tape.
Raw material preparation:
The main raw materials for wet kraft tape include adhesive, wet kraft paper and auxiliary materials. The adhesive is usually a sticky bonding agent and can be made of natural rubber, synthetic rubber or acrylic. Wet kraft paper is a cellulosic material derived from buffalo hides, which is highly resilient and abrasion resistant. Auxiliary materials include plasticisers, fillers and stabilisers.
Wet kraft paper treatment:
Wet buffalo kraft paper needs to be treated to improve its workability and bonding properties. Firstly, the buffalo hide is cleaned and soaked to remove impurities and dirt. The buffalo hides are then soaked in a specific chemical solution to soften the cellulose fibres and improve their flexibility. Next, the treated buffalo hides are cut and ground to obtain the desired wet buffalo kraft paper.
Coating:
In the coating process, the adhesive is applied evenly to the back side of the wet buffalo kraft paper. This is achieved by means of a coater, in which the wet buff kraft paper is transported on a set of rolls on which the adhesive is applied and then rolled onto the back of the wet buff kraft paper. The applicator has a precise control system to ensure even application of the adhesive.
Drying (continued):
The drying process for wet kraft tapes requires special attention to ensure that the quality of the paper and adhesive is not compromised. The control of drying temperature and time is very important; too high a temperature may cause the paper to become brittle or the adhesive to lose its adhesion, while too long a drying time may cause the wet kraft paper to lose its flexibility.
Cutting:
The dried wet kraft tape will be cut by a cutting machine. The cutter uses a sharp blade to cut the tape to the required width and length. The cutter usually has an automated control system that allows for accurate cutting according to preset specifications.
Packaging:
Once cut, the wet kraft tape needs to be packaged for storage, transport and sale. The packaging process usually involves the following steps:
Reeling: The cut wet kraft tape is wound on a specific reel or mandrel. This can be done by placing the tape on a large reel and winding it up using an automatic or semi-automatic device.
Packaging material preparation: Prior to packaging, packaging materials such as plastic film, cardboard boxes or plastic bags need to be prepared. These packaging materials are used to protect the wet kraft tape from contamination, moisture and physical damage.
Packaging: The rolls of wet kraft tape are placed in the pre-prepared packaging material. Usually, a roll of tape is packaged into a small roll or placed into a tape box. This process can be carried out either manually or using an automatic packaging machine.
Marking and labelling: After packaging, the wet kraft tape may come with a number of markings and labels, such as product type, specification, date of manufacture and brand information. These markings and labels help the user to better understand the properties and uses of the tape.
Quality control:
Quality control during the production of wet kraft tape is very important. Manufacturers usually carry out rigorous quality checks, including inspection of raw materials, wet water quality control (continued):
inspection of the kraft paper, sampling for coating quality, testing for drying effectiveness and inspection of the appearance and performance of the final product. These controls are designed to ensure that wet-water kraft tapes have a consistent quality standard and meet the needs and expectations of our customers.
Special treatments (optional):
Some wet kraft tapes may require additional special treatments to enhance their performance or to meet specific requirements. For example, the tape may be treated for water resistance, heat resistance or increased weather resistance. These treatments are usually applied according to the specific application area or customer requirements.
The production process for wet kraft tapes involves a number of steps including raw material preparation, wet kraft treatment, coating, drying, cutting and packaging. Through strict quality control and possibly special treatments, manufacturers can ensure that wet kraft tapes have high quality adhesive properties and durability. Wet kraft tapes are used in a wide range of applications and are particularly suitable for packaging and sealing tasks where flexibility and tear resistance are required. Manufacturers are constantly improving and innovating their production processes in order to meet market demands and provide better product performance.