SU1467125A1 - Pulp for making packing material - Google Patents

Abstract

The invention relates to the pulp and paper industry and reduces the cost of material while maintaining its quality. Paper pulp for the manufacture of packaging material contains sulfate unbleached softwood pulp with a degree of delignification of 50-70 units as a fibrous material. Kappa, mass content of hardwood pulp in. it is 15-30% and the degree of grinding 30-35 SR. White rosin glue is used for mass sizing, and alumina or alum is used as a coagulant. 3 tab.

Description

one

The invention relates to the pulp and paper industry.

The purpose of the invention is to reduce the cost of material while maintaining its quality.

The essence of the invention is that paper pulp for making sack paper as cellulose contains sulphate unbleached softwood pulp with a delignification degree of 50-70 units. Kapp, the mass content of hardwood pulp in it is 15-30% and the degree of grinding is 30-35 ° ShR.

Paper stock is prepared as follows.

Sulphate pulp entering the paper pulp is produced by boiling a mixture of softwood and hardwood chips, followed by hot grinding. Then the pulp is broken in disc mills at

concentration of 3-5% to the degree of help. la 30-35 ° ShR. White Rosin Glue

injected into the mass in the engine pool: in an amount of 0.2-0.5%. Coagulite (clay alumina or alum) is fed into the pipeline in front of the mixing pump in an amount of 2.0-5.0%. Then the paper pulp is fed to the mixing pump for dilution with circulating water to a concentration of 0.2-0.5%.

Diluted pulp under pressure is fed to cleaning equipment for cleaning from sand and heavy particles. The cleaned pulp is sent to the pressure box of the papermaking machine. From the pressure box, the paper pulp enters the grid dewatering table, then passes the pressing and drying parts, the refrigerator, the calender and the peripheral roll. Cook the paper is cut into rolls of the required sizes for longitudinal-.

EU

.

O5

sd

3-1

not-cutting machine. Paper H1 pipe machines make second-hand bags.

 Table 1 shows the quality indicators, paper weighing 78 g / m and | prepared from the proposed paper stock.

The data in the table shows that the paper according to specifications. OP has a slightly higher index of resistance to tearing (0.85 against o |, 98), however, the comprehensive quality indicator equal to 0.97 is close to | 1, i.e. the use of the proposed paper pulp allows reducing the amount of qecTOHMOCTb paper by using a larger amount of hardwood while maintaining its quality,

 To increase the strength of paper, ae is made of increased weight: 0 to 100 g / m, which allows for the manufacture of three-layer bags, instead of g | h

I P r and m in p 1, Bag paper u1 | ottlelivayut of mass containing,

YasL:

Coniferous-deciduous unbleached sulphate pulp

; White rosin-. glue

; Alumina (alum)

: Hardwood unbleached content

sulphate pulp is 15

PRI mme R 2. Bag paper Is made from a mass containing,

wt%:

Coniferous-deciduous unbeli

sulphate celu- "

vine

White Rosin

glue

Alumina (alum)

The content of hardwood unbleached sulphate pulp is 20%.

PRI me R 3 Bag paper is made from a mass containing, in May,%;

Coniferous-deciduous unbeli

97,8

0.2 2.0

96.1

0.4 3.5

five .

sulphate pulp 94 5 White rosin glue 0.5 Alumina (alum) 5.0 The content of hardwood unbleached sulphate pulp is 30.0%.

Table 2 shows the quality indicators of the resulting paper.

Table 3 shows the mass capacity of paper bags from known and proposed paper pulp.

The results presented in Table 2 show that the sack paper from the proposed paper pulp is used to produce three-layer open and closed bags instead of five-layer open and closed bags from known paper pulp (GOST 2226-75) while ensuring the same consumer properties of the same level. . In this case, the consumption of packaging material for the manufacture of 1000 pieces is significantly reduced. bags (instead of 365.2, 0 and 351.0 kg are consumed depending on the weight of 1 m of paper used from the proposed paper pulp), which is a saving of 49.2 and 1A kg per 1000 pcs. paper bags.

five

0

five

0

F. formula

Paper pulp for the manufacture of packaging material containing sulphate unbleached softwood pulp, white rosin glue and coagulant, which means that, in order to reduce the cost price of the material while maintaining its quality, it contains sulphate unbleached hardwood pulp With a degree of dilcification of 50-70 units. Kappa, the mass content of hardwood pulp is 15-30% and the degree of grinding is 30-35 ° SHR in the following ratio of components, wt.%: Sulfate unbleached softwood-leafed cellulose 94.5-97.8

White rosin glue; 0.2-0.5

Coagul nt2.0-5.0

Table 1

Weight of paper with the area of 1 m, g Breaking force when released in the transverse direction, N, not less than

Relative lengthening when pulling in the transverse direction,%, not less

Absolute tearing resistance in machine direction, mN, not less

Air permeability, ml / 60 s

 Comprehensive quality indicator. Sack paper using softwood pulp. Data from the draft TU OP.

44.0

1.04

4.0

0.93

850830

200-600, 0

40

tvvlitz g

 The specific consumption of bag paper from a known mass was adopted according to the Kotlas pulp and paper mill for 1984.

Table 3

Claims (2)

Claim Pulp for the manufacture of packaging material containing sulfate unbleached softwood pulp, white gum rosin and coagulant, characterized by 4θ in that, in order to reduce the cost of the material while maintaining its quality, it contains sulfate unbleached softwood softwood pulp with a degree of dilignification 50-70 units White rosin glue 0.4 Alumina (alum) 3.5 The content of deciduous unbleached sulfate pulp is 20%. Example Z. Bag paper is made from a pulp containing Kappa, the mass content of hardwood pulp 15-30% and the degree of grinding 30-35 ° SR in the following ratio of components, wt.%: May sulfate unbleached softwood pulp 94.5-97.8. %: Coniferous deciduous White rosin glue Coagulant 0.2-0.5 2.0-5.0 'table 1 Parameters Norm on Norm on Relative GOST TU OP ** show 2228-81E (offers tel ka (famous) gay) honest The mass of paper with an area of 1 μ ² ·, g ⁷⁸ -3 ^{78 s} 1,0 tear at break in the transverse direction, N, not less Elongation at break in the transverse direction,%, not 42.1 44.0 1, 04 less Absolute tear resistance in the machine direction, mN, not 4.3 4.0 0.93 less Breathable 980 850 830 bridge, ml / 60 s Absorbable with one-sided wetting, for 200-600 200-600 1,0 60 s, g / m 27 22-27 1,0 Humidity% 8-1 1 8-11 K * = 0.97 1,0 * A comprehensive indicator of quality. hk Bag paper using softwood pulp. Data from the project TU OP. I table 2 Paper mass Component Content £ paper With With Quality Indicators mousse , mas, X her " stump howling paper HvSIMO- Lmstvo- Coniferous White Glyco nnfy- Yes. Hassa Raspy- Relative ACso- sheet- May whole sulfate - cann hey capnn 4ίΡ boomers Jamme e yoye ud / lske- twotmo venous lolosa feces int folk (kvass- Cav um an effort when CODpO cellulose lulose ny Yes) 4" captivity in rastaghek tivle loea glue LYS list of across MRI 1 and ¹ , g nom wok wrong section and in full pen, T equally le cues, N mn An lime (GOST 2228CH1Zh brand M-78A) - 10 87.8 0.2 2.0 35-50 20-25 "'4 No less 42.1 No less 4.3 No less 980 Offered for dressing to 97.8 fifteen 0.2 2.0 fifty thirty 100 57.4 5." H4 & 2 9B, 1 20 • 0.4 5.5 60 33 95 54.0 4.8 1070 3 94.9 thirty • 0.5 5,0 70 35 90 51.2 4.6 1030 ____ Ί Table 3 Paper pulp Weight If-, Specific Dynamic Weight bag honest consumption cheskaya zatari- Noah in bag other of the paper eve ev noisy nost product area in the mesh magicians on in accordance with GOST kg YES% ke fabricated 2226-75, 1 m, g laziness number 1,000 pcs blows bags kg No less Famous 78 5 365.2 * 16 5 50 Proposed 90 3 316.0 16 40 100 3 351,0 16 fifty * Specific consumption sack paper from famous masses adopted Kotlas PPM data for J 984