HG/T 2350-1992 Nomenclature of polyamide (PA) homopolymers for molding and extrusion
Some standard content:
Chemical Industry Standard of the People's Republic of China
Nomenclature of polyamide (PA) homopolymers for molding and extrusion
This standard is equivalent to the international standard ISO1874/1--85 "Plastics-1 Subject Content and Scope of Application
HG 2350-92
Nomenclature of polyamide (PA) homopolymers for molding and extrusion". 1.1 This standard specifies the naming method of polyamide materials. This nomenclature is based on the type of polyamide, main purpose, characteristic properties, and main additives.
1.2 This nomenclature applies to all polyamide homopolymers for molding and extrusion. 1.3 This standard does not provide engineering data and performance data required for the specific use or processing of the material. 2 Reference standards
GB1040 Plastic tensile test method
GB1844 Plastic and resin abbreviation codes
GB12006.1 Determination method of polyamide viscosity number 3 Naming method
The naming method of polyamide materials is: abbreviation code + model. 3.1 Abbreviation code
The abbreviation code of polyamide is PA according to the provisions of GB1844. 3.2 Model
The model of polyamide material consists of the following five parts: 1st digital group: polyamide type
-2nd digital group: 1st digit: main purpose or processing method, expressed in English letters 2nd to 4th digits: main additives, expressed in English letters 3rd digital group: 1st digit: viscosity number, expressed in 2 Arabic numerals 2nd digit: tensile elastic modulus, expressed in 3 Arabic numerals
3rd digit: crystal nucleation additive, expressed in the English letter N The fourth digital group: The first position: filler, expressed in English letters The second position: physical state, expressed in English letters The third position: nominal content, expressed in two Arabic numerals The fourth position: nominal content of the second filler, expressed in two Arabic numerals
3.2.1 The first digital group
- The fifth digital group: special needs
Approved by the Ministry of Chemical Industry of the People's Republic of China on July 20, 1992 and implemented on January 1, 1993
HG 2350-92
This digital group indicates the type of polyamide, and its code and chemical composition are shown in Table 1. Polyamide type, code and chemical composition
PA 612
PA10107
PA MXD 6
Polyamide 6
Polyamide 66
Polyamide 69
Polyamide 610
Polyamide 612
Polyamide 11
Polyamide 1010
Polyamide 12
Polyamide MXD6
e-Caprolactam homopolymer
Hexamethylenediamine and adipic acid homogeneous polycondensate
Hexamethylenediamine and nonane Homogeneous polycondensation of dicarboxylic acid
Homogeneous polycondensation of hexamethylenediamine and sebacic acid
Homogeneous polycondensation of hexamethylenediamine and dodecanediol acid11-aminoundecanoic acid homopolymer
Homogeneous polycondensation of decanediamine and sebacic acid
-aminododecanoic acid homopolymer
Homogeneous polycondensation of meta-xylene diamine and adipic acidMaterials containing plasticizers may be indicated by the English letter "P" after the abbreviation code and separated by a short dash. 3.2.2, the second group of digits
The English letter in the first position of this group of digits indicates the main use or processing method, and the English letters in the second to fourth positions indicate the main additives, see Table 2.
Table 2 Main uses or processing methods, additive codes Code
Instructions for use:
1st
Pipes, profiles and sheets
Cable coating
17 There is no PA1010 in the international standard IS01874/1-85.366
Processing stabilizer
Anti-adhesive agent
Coloring agent
Powder, dry blend
Foaming agentbzxZ.net
Flame retardant
Pellets
Heat aging stabilizer
2nd~ 4th digit
1st digit
Rotational molding
Powder coating or sintering
Not specified
HG2350-92
Continued Table 2
Natural color (uncolored)
Improved impact properties
Mold release agent
Lubricant
Improved transparency
Hydrolysis resistance
Antistatic
2nd to 4th digit
If there is a specification in the 2nd to 4th digits, but not in the 1st digit, the letter Y should be added to indicate the 1st digit. 3.2.3 The 3rd digit group
The 1st digit of this digit group is the grading code for the viscosity number, and the viscosity number should be determined by the method specified in GB12006.1. The viscosity number is divided into grades according to its nominal value, and each grade code is represented by a two-digit Arabic numeral close to the arithmetic mean of each limit value, see Table 3. Table 3 Viscosity grade code and range
Viscosity range 96% (m/m) sulfuric acid, mL/g
≥90～110
>110～130
≥130～160
>160～200
>200～240
>240~～290
>290～340
99～116
Instructions for use:
Applicable to
PA MXD 6
PA10103
1) There is no PA1010 in the international standard ISO1874/1-85. Code
Viscosity range (m-cresol), mL/g
>110～130
>130~150
>150～170
>170～200
>200～240
Applicable to
HG 2350—92
The second digit of this digital group is the grading code of the tensile elastic modulus. The tensile elastic modulus should be determined by the method specified in GB1040. The tensile elastic modulus is graded according to its nominal value, and each grade code is represented by a 3-digit Arabic numeral close to the arithmetic mean of each limit value, see Table 4.
Table 4 Code and range of tensile elastic modulus
>150～250
>250～350
>350~450
>450～600
600～800
>800~1 500
Range, N/mm2
>1 500～2 500
>2 500~～3 500
>3 500~4 500
>4 500～5 500
>5 500~6 500
Range, N/mm2
>6 500~7 500
>7 500~8 500
8 500~9 500
>9 500~10 500
>10 500～11 500
>11 500~13 000
>13 000~~15 000
>15 000~17 000
>17 000~20 000
≥20 000~23 000
>23000
The third digit of this number group indicates whether it contains nucleation additives. Materials containing nucleation additives that can solidify rapidly (nucleate) can be indicated by the letter N at the last position of the third digit group.
If the performance value is at or close to the grading value, the manufacturer shall determine whether it belongs to this grade or another adjacent grade. In the first and second digits of this digital group, if any performance is not specified, "0" shall be added in the corresponding position. The codes of the first and second digits are separated from each other by a short line.
3.2.4 The fourth digital group
The English letter on the first digit of this digital group indicates the type of filler, the English letter on the second digit indicates its physical state, and the third and fourth digits are represented by two Arabic numerals to indicate the mass content. The filler type, physical state and content are shown in Table 5. Table 5 Filler types, physical states and their contents Code Code
Filler types
Physical states
Pearls, spheres
Powder, dry blend
Content (m/m), %
> 7.5~~12.5
>12.5 ~~17.5
>17.5~22.5
>22. 5~～27. 5
Material type
White (Caco)
Extension
Organic composite material#
Not specified
HG2350-
Continued Table 5
Physical state
Granular, milled
Irregular
Content (m/m)%
27.5~32.5
232.537.5
737. 5~~42. 5
242. 5-47. 5
765-75
Note: 1) Carbon organic synthetic materials and other materials can be indicated by chemical symbols or other codes agreed upon by both parties after the fourth digit. Mixed materials can be indicated by a plus sign in parentheses in conjunction with the relevant codes. For example, 25% (m/m) glass fiber (Cr) and 10% (m/m) mineral powder (M0) can be indicated as (G+M) in the first digit, F+D) in the second digit, and (25+10) in the third and fourth digits. 3.2.5 The fifth digital group
This standard does not specify the specific content of the fifth digital group. If there is a special need, it can be agreed upon by the relevant parties. 3.3 Digital groups should be separated by commas. If a digital group is not specified, it should be indicated by two commas. When the last group of digits is not specified, the two numbers *,, are omitted. 4 Naming examples
4.1 A certain polyamide material (PA6), for injection molding (M), containing a release agent (R), a viscosity of 150 mL/g (14), a tensile elastic modulus of 2700 N/mm (030), and a crystal nucleating additive (N) should be named: PA6, MR, 14--030N 4.2 A certain polyamide material (PA66), for injection molding (M), containing a flame retardant (F) and a heat aging stabilizer (H), a viscosity of 140 mL/g (14), a tensile elastic modulus of 10200 N/mm (100), and reinforced with 37% (35) glass fiber (GF) should be named: PA66, MFH, 14-- 100,GF35
4.3 A certain polyamide (PA12-P) containing plasticizer, for extrusion (E), containing heat aging stabilizer (H) and weathering stabilizer (L) with viscosity of 210m1./g22), tensile elastic modulus of 280N/mm2 (003) should be named: PA12-P, EHL, 22--003 Additional remarks:
This standard is proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is promoted by the Plastic Products Branch of the National Technical Committee for Standardization of Materials (SC4). This standard is drafted by the First Branch of the Zhanguang Chemical Research Institute of the Ministry of Chemical Industry. The main drafters of this standard are Zhao Shuzhen, Zheng Daode and Lu Qingyun. 369
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