GB/T 18146.1-2000Hemp fibre--Part 1:Raw white degummed hemp (English PDF)

1 Scope

This document specifies technical requirements, sampling, test methods, quality assessment, handover acceptance, packaging, labeling, transportation and storage for raw white degummed hemp. This Standard applies to raw white degummed hemp.

2 Normative references

The provisions in following documents become the provisions of this Standard through reference in this Standard. For dated references, the subsequent amendments (excluding corrigendum) or revisions do not apply to this Standard, however, parties who reach an agreement based on this Standard are encouraged to study if the latest versions of these documents are applicable. For undated references, the latest edition of the referenced document applies.

GB/T 2828-1987, Sampling procedures and tables for lot-by-lot inspection by attributes (Apply to inspection of successive lots or batches)

GB/T 8170-1987, Rules for rounding off of numerical values

GB/T 9995-1997, Determination of moisture content and moisture regain of textile - Oven-drying method

GB/T 18147.1-2000, Test method for hemp fibre - Part 1: Test method for oil content in hemp fibre

GB/T 18147.2-2000, Test method for hemp fibre - Part 2: Test method for residual gum content in hemp fibre

GB/T 18147.5-2000, Test method for hemp fibre - Part 5: Test method for breaking strength of hemp fibre Hemp fibre - Part 1: Raw white degummed hemp

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

4 Technical requirements

4.1 The raw white degummed hemp is divided into first-class, second-class, and third-class products. The product lower than the third class are substandard products.

4.2 Carry out rating according to sensory characteristics, gummy fibre content, oil content, residual gum content, breaking strength.

4.3 See Table 1 for technical requirements.

6 Test methods

6.4.3 Calculate the gummy fibre content according to formula (2): Where, S - The gummy fibre content, %; G1 - The specimen mass, g;

G2 - The mass of the specimen after removing the hard strips and hemp skin.

7 Quality assessment

The raw white degummed hemp is rated according to Tables 1 and 2. Where,

a) The degree of failure of this product to contain defects shall not be lower than the technical requirements of the next level. If it is lower than the technical requirements of the next level, the defect is counted twice;

b) For the batch that fails in the relaxing inspection, the inspection results must be re-judged according to the number of acceptances and rejections of the corresponding extra-relaxing inspection. The next batch shall be transferred for normal inspection.

8 Handover acceptance

8.1 When the purchaser accepts the acceptance, it will receive the whole batch if the batch is determined as accepted. In principle, if the batch is determined as rejected, it shall be returned to the supplier, or shall be resolved through negotiation between the supplier and the purchaser.

8.2 Rejected non-conforming products can be repaired and submitted for inspection again in the prescribed manner after the purchaser agrees.

8.3 Rejected batches have been fully inspected by the supplier. After rejecting or repairing non-conforming products, it is allowed to submit for inspection again. The inspection method is determined by the purchaser.

8.4 If moisture regain and impurity content do not meet the regulations or are mixed and mixed in batches, it will be resolved through negotiation between the two parties.

8.5 The public quantity of hemp fiber is calculated according to formula (3):

Public quantity = weigh net quantity × (1 + official moisture regain) / (1+ measured moisture regain)...................... (3)

The calculation result is rounded off according to GB/T 8170, to one decimal place.

8.6 During acceptance by the purchaser, if the quality and quantity of hemp fibers are found to be inconsistent with the product quality inspection list or the delivery list, re-inspection shall be submitted within one month of arrival. After the supplier is notified, he shall reply within 15 days. If it is overdue, it will be dealt with according to the opinions of the purchaser.

8.7 When any party in production, supply, sale and use has any objection to the quality and quantity of the product, re-inspection can be submitted, or a re-inspection arbitration can be submitted to a professional fiber inspection agency. The results of the re-inspection shall be subject to one time.

9 Packaging, labeling, transportation and storage

9.1 The weight of each hemp handle is about 0.5kg. Bind 8~10 handles into a simple bundle. Bind two strands with the same fine hemp.

9.2 The mass of each hemp piece is about 80kg. The volume is about 0.48m³. It is […]