FZ/T 54074-2014Polypropylene monofilament (English PDF)

4.1 Product Classification

4.1.1 Fine denier type. the nominal linear density is 9.0dtex~72.0dtex; the corresponding single filament equivalent diameter is 0.036mm~0.100mm.

4.1.2 Medium-denier type. the nominal linear density is >72.0dtex~446.5dtex; the corresponding monofilament equivalent diameter is >0.100mm~0.250mm.

4.1.3 coarse denier. the nominal linear density is >446.5dtex~7111.0dtex; the corresponding monofilament equivalent diameter is >0.250mm~1.000mm.

4.2 Product Identification

4.2.1 Fine denier and medium denier. expressed in terms of linear density and equivalent monofilament diameter. The linear density unit is dtex; the monofilament equivalent diameter the unit is millimeter (mm).

Example. The linear density is 55.5 dtex, corresponding to a monofilament equivalent diameter of 0.088 mm, and its product specification is expressed as 55.5 dtex/1f (0.088 mm).

4.2.2 Coarse denier. expressed in equivalent diameter of the corresponding monofilament. The monofilament equivalent diameter unit is in millimeters (mm).

Example. The corresponding monofilament equivalent diameter is 0.331 mm, and the product specification is expressed as 0.331 mm/1f.

4.2.3 Products are identified by product specifications and production processes.

Example. 55.5dtex/1f (0.088mm) has light, of which 55.5dtex represents the linear density of the wire, 0.088mm represents the equivalent diameter of the monofilament, and 1f represents a single Silk, light means great light.

5.1 Product Classification

Polypropylene monofilament products are divided into three grades. superior grade, first grade, and qualified grade, which are lower than qualified products.

5.2 Performance Projects and Indicators

See Table 1.

5.3 Appearance Projects and Indicators

Can be based on agreement between the supplier and the purchaser or according to Appendix B.

5.4 Shaped cross-section shapes and indicators

Determined by the supply and demand sides.

( net

Indeed

Indeed

Indeed

Indeed

6.1 Linear density test

Execute according to GB/T 14343, where.

--- Fine denier and medium denier, using skein method, sample length 100m;

---Coarse denier, using skein method, sample length 50m.

6.2 Test of breaking strength and elongation at break

Execute according to GB/T 14344.

6.3 Thermal Shrinkage Test

Execute according to GB/T 6505. The test temperature for dry heat shrinkage is recommended (120 ± 3) ° C for 15 min.

6.4 Oil content test

Execute according to GB/T 6504.

6.5 Tube weight test

Weigh the package with a weighing scale, electronic scale, etc., which is suitable for the weighing range. After deducting the known skin quality, the net mass is the weight of the package.

It is indeed 0.5% and recorded.

6.6 Appearance inspection

Performed in accordance with Appendix B.

6.7 Shaped degree

Execute according to FZ/T 50002 regulations.

7.1 Inspection items

7.1.1 The items in Table 1 are all inspection items and are inspected according to the corresponding test methods specified in Chapter 6.

7.1.2 Appearance inspection items may be inspected according to the agreement between the supplier and the purchaser or the test method specified in 6.6.

7.2 Group approval

Periodic sampling is used to form an inspection lot within a certain range. A production batch can consist of one inspection lot or several inspection lots composition.

7.3 Sampling regulations

7.3.1 The laboratory samples tested in each item in Table 1 shall be sampled according to GB/T 6502.

7.3.2 Full inspection of visual inspection.

7.4 Decision rules

7.4.1 The measured value or calculated value of the performance item is compared with the limit value of the performance index of Table 1 according to the comparison method of the repair value in GB/T 8170.

Rating level.

7.4.2 Appearance inspection items are assessed piece by piece.

7.4.3 The assessment of the comprehensive grade of the product shall be determined by the grade of the minimum performance index and the appearance index of the inspection batch.

7.5 Re-inspection rules

7.5.1 General

A batch of products can be re-inspected within three months of receipt of the goods as an acceptance or an objection to quality. If the quantity of the batch is used when more than one third of the time, no re-inspection may be applied. However, if the receiving party can produce relevant evidence that the batch of products does affect the post-processing when the quality of the product and serious losses are caused, the reasons should be analyzed, and the responsibilities of both parties should be clarified and negotiated.

7.5.2 Inspection items

Same as 7.1.

7.5.3 Group approval

Products that are batched according to the original production batch number, but with a production date interval of more than 90 days, cannot be batched by the same batch number.

7.5.4 Sampling regulations

7.5.4.1 Performance indicators The laboratory samples of the project shall be sampled in accordance with GB/T 6502 when the packaging is complete. When the packaging is incomplete, fine denier Type monofilament, peeling surface layer about.2000m; medium-denier monofilament, peeling surface layer about 1000m; then sampling according to GB/T 6502.

7.5.4.2 Appearance is a sampling test. Determine the sample size according to the general inspection level II in Table 1 of GB/T 2828.1-2012 (code).

7.5.5 Retest assessment

7.5.5.1 Performance indicators The measured values or calculated values are based on the comparison of the revised value in GB/T 8170 and the limit of the performance indicators in Table 1.

Value comparison, rating.

7.5.5.2 Appearance items According to the sample size of 7.5.4.2, according to the normal inspection sampling plan AQL in Table 2-A of GB/T 2828.1-2012 the value is 4.0 to determine the number of qualified judgments Ac and the number of failed judgments Rc, and is evaluated according to the contractual indicators of the supply and demand sides. When the number of unqualified packages is <= Ac the time is the original level. When the number of unqualified packages is >= Rc, one level is lowered according to the original level.

7.5.5.3 The assessment of the comprehensive grade of the product shall be assessed according to 7.4.3, if it is higher than or equal to the original grade, it shall be judged as conformity, and if it is lower than the original grade, it shall be judged as not.

meets the.

7.5.6 Public quality

The measured moisture regain rate was measured according to the provisions of GB/T 6503. The public mass is calculated according to formula (1).

m=m1×

1 R0

In the formula.

m --- batch product package quality, in kilograms (kg);

M1 --- the net mass of the package of the batch product, in kilograms (kg);

R0 --- polypropylene monofilament has a specified moisture regain, the value is 0.0%;

R --- polypropylene monofilament measured moisture regain, %;

Note. The net quality refers to the quality of the bobbin and the wrapping paper; the quality of the bobbin and wrapping paper is calculated as the average of the actual mass.

When the difference in the specified quality does not exceed 0.5%, no compensation will be given; if it exceeds, the actual excess will be compensated.

8.1 Mark

The package name should be marked with the product name, specification, grade, batch number, net weight, gross weight, number of packages, packaging date, product standard number, trademark, Relevant information such as the name of the manufacturer, the detailed address, and other warning signs such as moisture-proof and careless.

8.2 Packaging

8.2.1 Each package should be placed in a plastic bag (or plastic film) and placed in the package. The package should ensure that there is no friction and collision between the packages.

For example, the quality of the packaging should ensure that the package is not damaged.

8.2.2 The package size in each package should be as uniform as possible. Different varieties, specifications, batch numbers and grades must be boxed separately. Mixed mixing is strictly prohibited.

8.2.3 Each batch of products should be accompanied by a quality inspection form.

8.3 Transportation

It is forbidden to damage the packing box and get wet during transportation.

8.4 Storage

The boxes are stacked in batches and stored in a dry, clean, ventilated place.

Appendix A

(informative appendix) Conversion of polypropylene monofilament linear density and corresponding monofilament equivalent diameter A.1 monofilament equivalent diameter Calculate the equivalent diameter of the monofilament according to the theoretical value of the linear density, and calculate according to the formula (A.1).

pi×rho×104

×2 (A.1)

In the formula.

ED --- monofilament equivalent diameter in millimeters (mm);

Tl --- linear density of monofilament, in dtex (dtex);

The density of rho --- monofilament in grams per cubic centimeter (g/cm 3 ).

A.2 polypropylene monofilament equivalent diameter it is known that the linear density of the polypropylene monofilament can be derived by referring to the average density of polypropylene of 0.91 g/cm3, and is converted into a corresponding one according to the formula (A.2).

Monofilament equivalent diameter.

EDP = 0.9 × rhoPl × 0.0125 (A.2) in the formula.

EDP --- polypropylene monofilament corresponding to the equivalent diameter of the monofilament, the unit is mm (mm);

线Pl --- polypropylene monofilament linear density, the unit is dtex;

0.0125 --- a coefficient derived from the average density of polypropylene of 0.91 g/cm 3 .

Appendix B

(normative appendix) Appearance requirements, inspection, assessment B.1 Technical requirements B.1.1 The appearance is divided into three grades. superior, first-class and qualified.

B.1.2 Appearance items and indicators are shown in Table B.1.

Table B.1 Appearance items and indicators

No. Item Excellent Item First Class Qualified Product

1 Stretched insufficient yarn/(piece/cylinder) <= 0 0 0 2 knot/(piece/cylinder) <= 0 1 3 3 color difference a (gray card)/level >= 4-5 4 3-4 4 pollution b no slight light

5 Forming c is good and good a "Color difference" refers to the rating between the cylinder and the cylinder with reference to GB/T 250.

b "Pollution" first-class product "slightly" refers to light-colored fine-spotted stains whose total area does not exceed 0.5cm2; qualified products are "light" and refer to shallow or darker spots.

The total area does not exceed 1.0cm2.

c "Molding" superior product "better" means that the surface of the package is flat and unwinding smoothly; the first-class product is "good", which means that the surface of the package is relatively flat and does not affect the unwinding;

"General" means that the surface of the package has irregularities, but does not affect the unwinding.

B.2 Inspection

B.2.1 Inspection equipment Appearance inspection can be performed using a moving light source, a fixed light source or a classifying table.

--- Moving light source. requires illuminance greater than or equal to 600lx, no strong interference light source.

Note. The moving light source is selected according to the actual situation, and it can be a charging lamp or a flashlight or any other one that can meet the illumination requirement.

---Fixed light source. ordinary fluorescent lamps arranged in parallel, hanging at a height of 180cm~200cm from the ground, the wire car is directly below it is easy to observe the oil on the surface of the packaged wire.

---Classification table. black countertop, height 75cm~80cm. Two D65 high color fluorescent lamps (or ordinary fluorescent lamps) are mounted in parallel above, There should be no other scattered or reflected light in the surrounding environment. The illumination at the working point is greater than or equal to 600lx.

B.2.2 Inspection steps B.2.2.1 Rotate one turn on the classifying device to observe the two end faces of the package and one column surface.

B.2.2.2 Inspect each item to be inspected according to the requirements of B.1.2.

B.2.2.3 Check the difference of each package, and visually measure the abnormality of the forming and the thickness of the thread, and calculate the number.

B.2.2.4 Check the forming bevel of the straight tube conical package (H package, according to the production record), based on the visually visible interval, the interval is generally Must not be greater than 5mm, calculated in number.

B.2.2.5 Check the surface contamination to visually see the oil, rust and other stains that can be seen, and calculate the area.

B.2.2.6 Inspection Package molding refers to the winding of the wire layer of the wire, the package is not packaged too hard, too soft, three faces are uneven and packaged Improper position, do not press the test when testing.

B.2.2.7 The test color difference is based on the color difference between the package and the package, and the color difference between the deepest and the shallowest of each package end face is determined by the gray card.

Set, record.

B.2.2.8 Record the results.

B.3 Assessment rules B.3.1 Insufficient yarn refers to a strand that has not been fully stretched, has a significantly longer elongation than the drawn strand, and is significantly thicker in diameter. Inspection package the total surface of each cylinder is determined by the number of stretched filaments per cylinder.

B.3.2 The knot of the knot shall be at the end of the unwinding direction, without affecting the unwinding, and the length of the knot shall not exceed 5 mm. Inspection volume the total surface of the package is equal to the number of knots accumulated in each package.

B.3.3 Surface contamination refers to oil, rust and other stains. The total area of contamination on the surface of the barrel is determined.

B.4 Comprehensive classification the lowest grade in the appearance item is the grade of the package.