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A low melting point valve pocket and its manufacturing method

A production method and technology of valve pockets, which are applied in the field of packaging bags, can solve problems such as inability to stack, poor physical strength, and unstable quality, and achieve the effects of convenient stacking and transportation, good impact resistance, and good anti-skid effect

Active Publication Date: 2022-03-15
仲铂新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. The production process is backward, the labor intensity is high, the output is low, and the quality is unstable
[0007] 2. The melting point of the valve bag with low melting point is not suitable. Since the temperature of the carbon black filling is 70-80°C, the valve bag will be thermally deformed after being filled with carbon black, and will be squeezed and deformed after stacking, resulting in collapse
[0008] 3. The physical strength is poor, and the heat sealing strength is not enough to easily cause material leakage
[0009] 3. When carbon black is filled, a large amount of gas enters the valve pocket, and the gas in the bag cannot be removed. It will be squeezed and deformed during transportation, which will easily cause collapse or bag breakage and material leakage.
[0010] 4. The anti-skid effect of the valve pocket is poor, and it is difficult to stack and cannot be stacked, which affects the transportation

Method used

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  • A low melting point valve pocket and its manufacturing method
  • A low melting point valve pocket and its manufacturing method
  • A low melting point valve pocket and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Example 1: See Figure 1 ~ 3 A low melting point valve pocket comprising a valve pocket bag body, the valve port body 1 is provided with a valve port 2, the valve port 2 including the outer valve port 21 and the inner valve port 22, the outer valve port. 21 is provided on the right side of the top end on the valve pocket bag 1, the inner valve port 22 is disposed at a position corresponding to the outer valve port 21, the inner valve port 22 and the outer valve port 21. Connect each other.

[0052] The carbon black material is filled into the valve pocket bag 1 through the valve port 2, and the valve port 2 is folded to the valve body in the valve port, and the carbon black material is filled in the valve pocket bag body 1 Automatic sealing under gravity.

[0053]The valve bag 1 bag body cross section may be various shapes, such as circles, etc., square or rectangular.

[0054] The overall length of the outer port 21 is 220mm, the entire length of the inner valve port 22 is ...

Embodiment 2

[0087] Example 2: Example 2, the overall configuration of the present embodiment of the low melting point valve bag same as in Example 1, the manufacturing method of the low melting point of the valve bag, the specific preparation valve port and preparation bag comprising:

[0088] Wherein the valve bag preparation includes the following steps:

[0089] 1) mixing by weight: Take ethylene - vinyl acetate copolymer, 87.5%, 12.5% linear low density polyethylene material as the bag, and placed into the mixer sufficiently stirred and mixed.

[0090] In step 1) was stirred mixer mixing time was 35min, the mixing temperature is room temperature.

[0091] The ethylene Step 1) - VA vinyl acetate copolymer content was 12%.

[0092] Said step 1) is linear low density polyethylene produced by a metallocene catalyst is a metallocene linear low density polyethylene.

[0093] 2) blown film: the mixed material was poured into blown film, the film-blowing machine and the heat-melted blend was extr...

Embodiment 3

[0108]Example 3: The overall structure of the low melting point valve pocket in this Example 3 was the same as in Example 1, and the method of manufacturing the low melting point valve pocket, specifically includes a valve pocket preparation and a valve preparation:

[0109] Among them, the valve pocket system includes the following steps:

[0110] 1) EtOAc EtOAc EtOAc EtOAc.

[0111] The mixing machine is stirred in the mixing machine in the mixing machine in step 1) to 40 min, and the mixing temperature is normal temperature.

[0112] The VA content of the ethylene-vinyl acetate copolymer in step 1) is 10%.

[0113] The linear low-density polyethylene in the step 1) is a metallocene linear low density polyethylene produced by a metallogenic catalyst.

[0114] 2) Blow film: Pour the mixed material into the blown film, the blown film is heated and extruded and extruded into a raw material film, and the raw material film is cooled to obtain a low melting point package.

[0115] The...

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Abstract

The invention discloses a method for making a valve pocket with a low melting point. The valve pocket with a low melting point has the following indicators: melting point 98-102°C; transverse tensile strength 23-25Mpa; longitudinal tensile strength 24-27Mpa; transverse elongation at break 750-820%; longitudinal elongation at break 730-760%; upper and lower heat-sealing strength 38-45N / 15mm; four-corner heat-sealing strength 38-45N / 15mm. Putting it into the internal mixer, it will not produce packaging waste when used, it is an environmentally friendly green product, and it is embossed when blowing the film to facilitate opening, the overall anti-slip effect of the bag body is good, the melting point of the low melting point valve bag is 98 ~ 102 ° C, and The melting point is stable; no thermal deformation will occur after injecting carbon black, and it will automatically fill up into a cuboid after being filled with materials, and the stacking will be neat. And the valve port is perforated to exhaust, breathable and no material leakage. The valve pocket has good compatibility with rubber, and can be quickly integrated into the rubber without affecting the performance of the rubber.

Description

Technical field [0001] The present invention relates to the field of packaging bags, and in particular, to a low melting point valve pocket and a method of making it. Background technique [0002] With the environmental protection requirements, carbon black is used as the main raw material in the rubber industry, and the carbon black packaging needs to be dressed in the valve pocket, and the valve pocket is used as a packaging bag. When the carbon black material is packaged, it feeds from the top or bottom valve port. After filling materials, there is an advantage of having a stack of neat, beautiful, high packaging efficiency, convenient transportation, low damage rate. [0003] However, the type of existing valve pocket includes a kraft paper valve pocket, a woven bag, a PE valve pocket, and the like, and the valve pocket is filled with a carbon black material, and does not make the valve pocket and materials when it is transported to a closed refining machine. It is put into t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B65D30/24C08L23/08C08J5/18B29C55/28B31B70/00B31B70/20B31B70/64B31B70/74B31B70/84
CPCB65D31/14C08J5/18B29C55/28B31B70/00B31B70/20B31B70/64B31B70/74B31B70/84C08J2323/08C08J2423/08
Inventor 周中华任世强张德刚
Owner 仲铂新材料有限公司
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