1. Research on raw material standards
The market supply of raw materials is very chaotic, good and bad, so far there is no technical quality standard of our country or industry. The specific performance is as follows:
(1) The name is confused;
Because of the wide variety of sand belt and its extension products, the variety of substrate used is also many, each enterprise takes its own name, is varied, which brings great inconvenience to users.
⑵ The material is confused;
Taking cloth as an example, the products on the market have pure cotton, blended, long-staple cotton, general cotton, and interwoven, and the proportion is also different, and there is no uniform standard to follow. Another example is the use of the most common water-soluble phenolic resin with the largest amount, so far there is no unified standard in China. As for the sandpaper belt emery cloth roll although there is a unified industry standard, but the sandpaper belt emery cloth roll manufacturers are strictly implement the standards, especially those small workshop sandpaper belt emery cloth roll factory, are hanging the brand of P sandpaper belt emery cloth roll, whether it meets the standard, no one to check.
(3) The fabric structure is chaotic;
At present, the fabric substrate supplied by the market has a variety of structures in its organizational density, the number of warp and weft yarns, twill plain, twill, and each manufacturer has its own set, and there is no standard at all.
(4) The intensity index is confused;
Since the strength of the fabric substrate is closely related to the organizational structure of the fiber material, a general strength data can not fully reflect the characteristics of the material, such as the strength of the steel paper if not linked with the thickness and softness, it will not be able to be used in production, such as cotton fabric with a little chemical fiber strength increased a lot, but the texture of the fabric has changed, the quality is not the same.
(5) Uniform standards shall be established for processed cloth.
To sum up, the material used in the sandpaper belt emery cloth roll must have a unified standard, so that users can easily choose the product. In order to standardize our country's sandpaper belt emery cloth roll products, we must start from the source to rectify, regulate the production of various materials, especially the three major materials - sandpaper belt emery cloth roll, substrate, binder.
Research content:
The existing sandpaper belt emery cloth roll products are classified, unified name, specifications, codes, and standards are formulated respectively.
Develop unified technical quality standards for the main raw materials used in sandpaper abrasive belt emery cloth rolls, including:
(1) Raw materials belonging to our industry, such as processed cloth, composite bases, etc., are formulated by industry standardization departments and industry associations.
(2) Raw materials that belong to the external supply of the industry, such as grey cloth, base paper, steel paper, phenolic resin, etc., by the industry organization to come forward, and negotiate with the relevant industry standardization organization, to develop the material standard dedicated to the sandpaper sand belt emery cloth roll.
