This standard specifies the classification, technical indicators, test methods, inspection rules and packaging, sampling, storage and transportation requirements of precipitated hydrated silica (also known as precipitated white carbon black). This standard applies to precipitated hydrated silica used as a rubber compound. HG/T 3061-1999 Technical conditions for precipitated hydrated silica for rubber compound HG/T3061-1999 Standard download decompression password: www.bzxz.net

1 ScopeWww.bzxZ.net
Chemical Industry Standard of the People's Republic of China
Precipitated Hydrated
Rubber Compounding Ingredients--Silica,precipitated,hydrated-SpecificationsHG/T 3061-1999
neqIso5794-1：1994
Replaces HG/T2197-91
HG/T 3061-1989
HG/T3074--1989
This standard specifies the classification, technical indicators, test methods, inspection rules and packaging, sampling, storage and transportation requirements of precipitated hydrated silica (also known as precipitated white carbon black).
This standard applies to precipitated hydrated silica used as a rubber compounding ingredient. 2 Reference Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T528--1992 Determination of tensile properties of vulcanized rubber and thermoplastic rubber Rubber compounding ingredients Test formula and physical property determination of precipitated hydrated silicon dioxide in rubber (eqvHG/T2404-1992
ISO5794-2:1982)
HG/T3062—1999
3063--1999
3064-1999
3065-1999
3066-1999
30671999
3068--1999
3069--1999
3070-1999
30721999
HG/T 3073—1999
3 Definitions
Rubber compounding ingredients-Determination of the silicon dioxide content of dried samples of precipitated hydrated silicon dioxide (eqvISO5794-1:1994)
Rubber compounding ingredients
Precipitated hydrated silicon dioxide-Comparison method for the color of precipitated hydrated silicon dioxide (eqvISO5794-1:1994)
Rubber compounding ingredients
Rubber compounding ingredients
1:1994)
Rubber compounding ingredients
Rubber compounding ingredients Compound
Rubber compound
Rubber compound
Rubber compound
Determination of 45μm sieve residue of precipitated hydrated silicon dioxide (eqvISO5794-1: Determination of heating loss of precipitated hydrated silicon dioxide (eqvISO5794-1:1994) Determination of ignition loss of dried sample of precipitated hydrated silicon dioxide (eqvISO5794-1:1994) Determination of pH value of aqueous suspension of precipitated hydrated silicon dioxide (eqvISO5794-1: Determination of total copper content of precipitated hydrated silicon dioxide (eqvIS ISO5794-1:1994) Determination of total manganese content of precipitated hydrated silica (eqvISO5794-1:1994) Determination of total iron content of precipitated hydrated silica (eqvISO5794-1:1994) Determination of dibutyl phthalate absorption value of precipitated hydrated silica Nitrogen adsorption method (eqv
Determination of specific surface area of ​​precipitated hydrated silica ISO4652:1994)
This standard adopts the following definitions:
Approved by the State Administration of Petroleum and Chemical Industry on August 12, 1999 2 000-10-01 Implementation
D:V Xiaoniu Road
HG/T3061-1999
Silica, precipitated, hydrated is a material composed of amorphous particles obtained by precipitation from a soluble silicate aqueous solution. Classification
According to the specific surface area of ​​precipitated hydrated silica, it is divided into six categories (see Table 1). Table 1 Classification of precipitated hydrated silica
5 Requirements
5.1 Chemical formula: Si0,·nH0.
Specific surface area, m2/g
161~190
136~160
5.2 Appearance: white powder or granular.
5.3 The chemical and physical properties of the product shall meet the technical requirements listed in Table 2. Table 2 Technical requirements for precipitated hydrated silica
Silicon dioxide content (dry product), %
Sieve residue (45μm), %
Heating loss, %
Ignition loss (dry product), %
Total copper content, mg/kg
Total manganese content, mg/kg
Total iron content, mg/kg
Dibutyl phthalate (DBP) absorption value, cm/g500% tensile stress, MPa
Tensile strength, MPa
Elongation at break, %
1The standard sample for color comparison shall be agreed upon by the supply and demand parties. Mesh
Specific surface area, m2/g
106~135
71~105
Better than, equal to standard sample
2.00～3.5023
2500% The tensile stress, tensile strength and elongation at break are measured by using the type 1 dumbbell cutter specified in GB/T528 and the positive vulcanization point test piece cutting sample.
Instructions for use:
1) Appendix E of ISO5794-1:1994 stipulates that the total iron content shall not exceed 500mg/kg. 2) ISO'5794-1:1994 does not have this provision. 3] ISO5794-1:1994 stipulates that it shall be agreed upon by both the supply and demand parties. 4
6 Determination method
6.1 Determination of silicon dioxide content
According to HG/T3062.
6.2 Comparison of color
According to HG/T3063.
6.3 Determination of 45μm sieve residue
According to HG/T3064.
6.4 Determination of heating loss
According to HG/T3065.
6.5 Determination of ignition loss
According to HG/T3066.
6.6 Determination of pH value
According to HG/T3067.
6.7 Determination of total copper content
According to HG/T3068.
6.8 Determination of total manganese content
According to HG/T3069.
6.9 Determination of total iron content
According to HG/T3070.
6.10 Determination of DBP absorption value
According to HG/T3072.
6.11 Determination of specific surface area
According to HG/T3073.
HG/T3061-1999
6.1 Determination of 2500% tensile stress, tensile strength and elongation at break shall be carried out in accordance with HG/T2404.
7 Inspection regulations
7.1 Inspection classification
Product inspection is divided into factory inspection and type inspection. 7.1.1 The factory inspection items are as follows:
Silicon dioxide content (dry product), color, 45μm sieve residue, heating loss, ignition loss (dry product), pH value, DBP absorption value. 7.1.2 Type inspection is to conduct full inspection of the technical requirements specified in the product standard. Type inspection should be carried out in any of the following situations: a. Trial production and identification of new products or old products transferred to the factory for production. b. After formal production, if there are major changes in raw materials and processes, which may affect product performance. During normal production, an inspection should be carried out periodically or after a certain amount of accumulation to assess the stability of product quality. c.
d When the product is resumed after a long-term suspension of production. e.
When the factory inspection results are significantly different from the last type inspection. When the national quality supervision agency proposes a type inspection requirement. Imported products.
When there is a conflict between the supply and demand parties and arbitration is required. 5
7.2 Sampling 1
7.2.1 Sampler
HG/T3061—-1999
Sampling tube or stainless steel spoon with semicircular or C-shaped cross section. 7.2.2 Sample container
, a suitable container that can be sealed, moisture-proof and will not contaminate the sample. 7.2.3 Sampling method
Randomly select sampling bags from the overall material according to the number of sampling bags in Table 3, open the bag mouth of the sampling bag, use a sampler to sample near the center of the bag, and take an equal portion from each sampling bag. The mixed sample should be more than 500g. Table 3 Provisions for selecting the number of sampling bags
Total number of material bags
26～100
101~500
501~1000
1001～3000
3001~10000
≥10001
7.2.4 Sample label
Minimum number of sampling bags
After the sample is placed in the container, a label shall be immediately affixed to the outer wall of the container. The label shall include the following contents: sample name and number;
Overall material batch number and quantity;
c production unit;
d sample quantity;
e sampling location;
f sampling date;
g name of sampler.
7.2.5 Sample Storage
7.2.5.1 Samples should be stored in a sample room with appropriate temperature and humidity. 7.2.5.2 The effective storage period of samples is 6 months. 7.3 Judgment Rules
Both factory inspection and type inspection shall be judged according to the requirements. If one item does not meet the index, it shall be judged as a defective product. 7.4 Acceptance
7.4.1 Product acceptance shall be carried out in accordance with the factory inspection regulations. 7.4.2 The acceptance period shall be completed within 30 days from the date the product is delivered to the consignee's station or port. 7.4.3
Arbitration.
When a quality dispute occurs between the supply and demand parties, both parties shall jointly collect samples according to this standard and send (or mail) them to the National Carbon Black Quality Inspection Center for adoption. Instructions:
1) ISO5794-1:1994 adopts the method of ISO842 "Raw Materials for Paints and Varnishes - Sampling", using a sampling tube with a semicircular or C-shaped cross section for sampling. According to the actual situation in my country, this standard adds sampling with a stainless steel sampling spoon. 6
8 Packaging, marking, storage and transportation
8.1 Packaging
HG/T3061--1999
8.1.1 At the end of the production process, the net content of each package is multiples of 5.0kg or according to the user's requirements, and the allowable error of weighing is ±0.2kg.
8.1.2 When the product is packaged in a bag, the bag mouth should be sealed. The packaging material must have sufficient strength to prevent damage during storage and transportation, and have moisture-proof and anti-pollution capabilities.
When polyethylene bags and plastic woven bags are used, a. Inner bag: polyethylene bag with a thickness of not less than 0.04mm; b. Outer bag: plastic woven bag.
8.2 Marking
Each packaging bag has a striking logo on the front, which includes the following: product name;
Registered trademark;
Product standard code;
Category;
Net content;
Manufacturer name and address;
Production date or batch number;
Warning mark;
1 Product certificate.
8.3 Storage and transportation
8.3.1 Products should be stored in ventilated and dry warehouses. 8.3.2 Avoid mixed storage and transportation with items that may deteriorate the product or damage the packaging bag. 8.3.3 During storage and transportation, the product packaging must be kept clean and intact, and any product that leaks out of the package must not be put back into the package.
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.