Updated on July 15, 2025 06:37:47 PM
Rubber micro-cellular sheets have specific applications in footwear manufacturing, especially for the production of soles and heels. These sheets are highly cellular in structure and offer the right measure of both stiffness and flexibility that is required to make comfortable shoes. The Bureau of Indian Standards (BIS) has laid down certain standards that are followed to maintain the quality and safety of these rubber sheets and they are covered under IS 6664:1992. This standard also contains information regarding the requirements for the production of a product that meets the standards for backlighting technology, methods for conducting the tests, and steps used to certify a product.
It is to be noted that in the contemporary world, it has become more or less essential or at least advantageous to have the BIS certification for the manufacturers to gain access to the Indian market. This certification thus represents an important mark of origin, which strengthens the consumer perception, and makes sure to meet national rules. The process comprises documentation, testing, and payment of the official government-set fees. It is for these reasons that appreciating these requirements is very vital as the manufacturers in the market struggle to comply with requirements that are always altering.
In this blog, the reader will come to know about the Performance Requirements of IS 6664:1992, the testing methods, BIS Certification, and the BIS Charges that are involved in the same.
IS 6664:1992 is one of the important standards that deal with the requirements of rubber micro-cellular sheets in manufacturing soles and heels for footwear. This standard was first published in with a new version published in 1992 to guarantee that rubber sheets provided conform to some key characteristics that are appropriate for use in the production of shoes.
The standard outlines the physical characteristics that micro-cellular sheets of rubber must exhibit, such as rubber hardness, density and tensile strength. It enjoins that these sheets should be made from natural or synthetic rubber or both, commonly referred as NR or SR and must be vulcanized to increase the durability of the material. As well, there should not be any imperfections like cavities, blisters or any other that may be found on the surface of the sheets.
Key Specifications
These specifications help manufacturers to arrive at the best quality products that fit various applications in the footwear industry.
The series of rubber micro-cellular sheets can be divided according to their functions and special performance. It assists the manufacturers in identifying which type of sheet is appropriate for a given type of footwear production.
There are two categories of rubber micro-cellular sheets they are as follows:
It also provides knowledge and capabilities to the manufacturers on the choice of the right materials that are suitable to address the consumer’s demand as well as conforming to the set legal standards.
It is evident from this IS 6664:1992 that the performance requirements offered for rubber microcellular sheets are vital in making sure that the sheets can cope with the structural demands required in their daily use. Key performance indicators include:
Key Performance Requirements
These tests are very important since they will prove that the rubber sheets will be able to give a good account of themselves when placed in the real environment.
The testing methods developed in IS 6664:1992 can be considered as a guide that would lay down a methodical procedure that would be aimed at the assessment of rubber micro-cellular sheets on the basis of their performance characteristics. Each test simulates conditions that materials will encounter during their lifecycle. Each test simulates conditions that materials will encounter during their lifecycle:
These methods help to make the right conclusions regarding the conformity of products to BIS standards.
For these tests, the manufacturer has to have a laboratory with standard testing equipment as laid down by IS 6664:1992. This facility should be very clean and well-run because accuracy of the results should always be a priority.
Organizational members involved in laboratory testing have to be trained in testing and know about BIS standards to be complied with in the assessment. This may also include periodic checks and/ or annual assessments by the BIS standard aimed at ascertaining if the testing practice is meeting the set regulation.
As usual, the rubber micro-cellular sheets should be labeled or marked in the right manner so as to fit the provisions of IS 6664:1992. Each product must carry specific information, including:
Key Labeling Requirements
It helps in traceability and enables the consumers to have confidence that their products are safe and have met the required standards.
The BIS certification process for rubber micro-cellular sheets involves several steps:
Applications are filled including relevant documents that outline the production processes of the manufacturers.
A BIS officer pays a visit to the manufacturing company in order to assess the levels of compliance with set regulations.
The samples from the production batches are analyzed at the BIS-accredited laboratories.
As a result of the evaluation of these facilities and products, BIS grants permission to the manufacturers to use the ISI mark on their products.
To sustain the standards practice, normal assertions are carried out.
This is a process that the manufacturers need to understand so that they can get an efficient certification process.
To obtain BIS certification for spoke wheel rims, manufacturers must prepare and submit several essential documents:
| General Documents | Technical documents |
|---|---|
| GST Certificate | Raw Material List |
| MSME Or Udyam Certificate (Not applicable for large-scale industries) | Raw Material Test Certificate |
| Manufacturing land details (Lease Deed/ Rent agreement) | Plant Layout (Lab, Office, Raw material area, Finished Goods area) |
| MOA/AOA (If Private Limited) | Machinery List |
| Electricity Bill | Location Layout |
| Authorization Letter | Equipment List |
| QCI Adhaar Card | Process Flow Chart and Description |
| QCI Appointment Letter | NABL approved Calibration |
| QCI Degree Certificate | Product Specific Declaration as per clause no |
| Owner’s Pan Card | |
| Factory License |
BIS certification serves multiple purposes:
As the marketplace becomes more saturated, a BIS certificate can work wonders to any manufacturing company or brand in the market
The government-approved fees for BIS certification of molded solid rubber soles and heels under IS 6664:1992 are as follows:
| Category | Fee(INR) |
|---|---|
| BIS Application Fees | 9000 |
| BIS Marking Fees | Micro Scale - 13,200 |
| Small Scale - 33,000 | |
| Medium Scale - 52,800 | |
| Large Scale - 66,000 |
NOTE: BIS testing charge fees are subject to changes from time to time depending on the circulating governments’ policies on fee structure.
Thus, it is recommended to visit the official site of BIS or consult with a BIS registration consultant like Professional Utilities.
The compliance of the manufacturers with the laid down standards such as IS 6664:1992 grants bearings manufacturers market entrée and also saves manufacturers from the wrapped ramifications of law for negligence in compliance with the standard. By adhering to these standards:
All in all, compliance with this standard is crucial for continued business in the existing footwear environment within India.
Conclusion
The use of rubber micro-cellular sheets cannot be overemphasized in the footwear industry hence the need for compliance with the IS 6664:1992 standards for producers who want to excel. Through the BIS certification process, these types of materials are checked for quality and this assures the overall safety of the consumer as well as satisfies him. By knowing and abiding by these regulations one is in a position to gain markets besides developing a reputation in the market as a reliable manufacturer of quality products.
As businesses continue to confront this tangled web, they may wish to consider utilizing compliance specialists for documentation of testing and certification. In the long run, it will be highly beneficial for an organization to allocate time and money to go through the BIS certification because the returns will include increased competitiveness in the market and consumer trust.
At Professional Utilities, we leverage our industry knowledge and expertise to help businesses navigate complex regulations, minimize risks, and optimize operations for maximum efficiency and profitability.
It is an Indian Standard that lays a standard for the use of rubber micro-cellular sheets in the soles and heels of footwear.
From the above analysis, it is evident that it fosters product quality, consumer confidence, and market entry in the Indian market.
Some of them are hardness test, compression set test, split tear strength test, shrinkage test, and water absorption test.
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